Zhejiang Jida Metal Co., Ltd. was founded in 2015, formerly known as Yueqing Jida Accessories Factory, specializing in the production of DZ47-60, C65, C60, NC, DPN and other adjustment screws and various fastening screws. Products such as adjusting screw wires used on C45 switches cover most of the country's markets. The company's customers include Panasonic, Chint, Shanghai Liangxin and other leading enterprises in the industry. With advanced production equipment and testing equipment, the various adjusting screws produced are of reliable quality, complete specifications and thoughtful service, which are well received by customers.      "Quality first, customer first" is the business tenet of Jeddah. The production attitude of keeping improving, rigorous technological process and strict inspection standards all reflect their attitude towards product quality. For a long time, Zhejiang Jida Metal Co., Ltd. regards quality as the life of the enterprise, regards sincerity and trust as its own development goals, and continuously improves product quality.       The quality control of our products is quite strict, because we rely on quality as our survival. Only when the quality is good, will more customers come to our door and the golden phoenix will fly in. There is also service. Outside Zhejiang Province, we deal with the suggestions or opinions put forward by customers 24 hours a day; in Wenzhou City, we must reply within 8 hours, which is the characteristic of our brand.   ——Wen Jinpu, General Manager of Zhejiang Jida Metal Co., Ltd.     How to combine business success with social responsibility, and balance the relationship between the pursuit of profit and social responsibility, is an unavoidable problem in the growth process of every enterprise. The fulfillment of corporate social responsibility not only has positive social value for the protection of the ecological environment, rational use of resources, and regional economic development, but also helps to enhance corporate image and brand competitiveness, and promote business success. All along, Jeddah has actively fulfilled its social obligations, built bridges and roads for the village, and participated in various charitable activities. In terms of corporate culture, it also attaches great importance to the humanistic care for employees. During the Chinese New Year in 2018, the company leaders also specially went to Guizhou to visit the company's old employees, so that employees can fully feel the warmth brought by the company.              We have come to this day step by step. Originally, it started with two people and three of myself, and now there are 140 people. Step by step, we have reached today. The original intention is to fulfill social responsibilities. Someone once asked me, he said we have so many medals, he asked me which one is the heaviest, and then I told him without thinking that Delixi gave me a medal, which is the award for fulfilling social responsibility. I think this is the heaviest weight for me.   ——Wen Jinpu, General Manager of Zhejiang Jida Metal Co., Ltd.       Integrity, cooperation, responsibility and gratitude are the core values that Jeddah has always followed. Wen Jinpu told us that facing the future, we will develop in a higher direction, keep advancing on the road of intelligent manufacturing, keep up with the pace of the times, keep pace with the times, become bigger and stronger, and go further.    

        One yuan resumes, and all phenomena are renewed. On the evening of January 15, 2019, the "Innovation, Development, Cooperation, and Win-win" 2018 Summary and Commendation Conference was held in the restaurant on the fifth floor. The company's shareholders, all employees and more than 100 employees' family members gathered together to witness this reunion. , a festive feast. At the annual meeting, Mr. Wen first, on behalf of the company's board of directors, extended his high respect and heartfelt thanks and New Year greetings to all Jeddah employees and their families.          Mr. Wen said that through the concerted efforts of all employees, all the tasks designated in 2018 were completed, and the marketing output value reached 65 million! It has increased by 20.7% year-on-year in 2017, and has won the title of excellent supplier awarded by many companies! The development history of Jeddah in the past 20 years: one step at a time, it has finally become the current scale, and the Jeddah brand is well-known in the industry! As a private enterprise, we present to the 40th anniversary of reform and opening up with outstanding achievements! As Jeddahs, we can't be more proud and proud. In the past 2018, in the face of increasingly strict quality requirements and fierce competition in the external market, we Jeddah people have made a lot of efforts in the following three aspects:         First: Increase the investment in hardware and greatly increase the production capacity. 1: A total of more than 3 million yuan has been invested to purchase 13 multi-station cold forging machines and 10 spring needle rolling machines; 2: Improve the quality of the iron core: re- Purchase machine tool slotting equipment with higher precision; 3: Invest more than 3.6 million yuan to build a new workshop to completely solve the crowded situation in the production workshop.         Second: Vigorously improve product quality to better meet market demand, 1: Invest more than 1 million to purchase advanced equipment such as optical picking machines and optical image measuring instruments; 2: Eliminate 14 outdated nut cutting machines and replace them all Use a higher performance automatic lathe.       Third: Vigorously improve the management level and strive to build a modern enterprise, 1: Invest a huge amount of money to completely update the existing ERP system, so that the data statistics will be more accurate and timely; 2: After painstaking and meticulous work and continuous Improvement: In 2018, the company has successfully passed the "safety production standardization" assessment and obtained the certificate; and also passed the audit of high-tech enterprises in Zhejiang Province; 3: The 2015 version of ISO9001 has been successfully renewed and passed the ISO18000 occupational health and safety system Certification; the 16949 system certification of the automotive industry has passed the preliminary review.        Fourth: Improve the humanized management mode: 1: In order to protect the physical and mental health of employees, the company invested more than 200,000 to install industrial range hoods in the cold heading workshop; 2: In order to reduce labor intensity and enhance safety, the multi-station workshop has A large trolley is installed.        Mr. Wen said that all Jeddah people will adhere to the core values ​​of "integrity, cooperation, responsibility, and gratitude", adhere to the main purpose of "innovation, development, cooperation, and win-win", and take "Jeda's ten points" as work requirements, doubly Work hard, make progress, and strive to "become the best fastener supplier in China, and make Jeddah the most respected enterprise in the industry!" This Jeddah people's dream is moving forward bravely!        The program of the annual meeting is splendid, divided into 3 sections: award ceremony, cultural performance and lottery. At the meeting, the company awarded the Excellent Manager Award, Excellent Team Leader Award, Excellent Team Award, Excellent Employee Award, Employee Loyalty Award and other awards. , an atmosphere of joy and gratitude permeates every space in the hall.       The company is full of talents and versatile. The party scene, self-editing, self-directing and self-acting. Created songs, dances, calligraphy and other wonderful programs. Happy to win the jackpot!

    At 18:00 on September 26, 2014, hosted by Zhejiang Chint Electric Co., Ltd. and undertaken by Chint Terminal Electrical Appliance Manufacturing Department, the thematic evening party celebrating the 30th anniversary of Chint "Welcome to the National Day, set sail with a dream" was held in North White Elephant, Wenzhou The basketball court in Chint Hi-Tech Industrial Park was grandly held.       As a green supplier of Chint, our company was invited by Chint Terminal Electrical Appliance Manufacturing Department and was honored to be the only supplier of Chint to participate in this theatrical performance.       At 18:45 in the evening, with the loud announcement of the host: "Next, let us give the warmest applause to the Chint supplier Wenzhou Jida Technology Co., Ltd. Qiu Qinlai and others to perform calligraphy and ink dance, please enjoy !" accompanied by the Tai Chi music of a classic old song "Men should be self-improvement"... On the stage, I saw a white-robed man in a Tang suit that looked like a hawk fighting a rabbit, and his spirit was like a cat catching a mouse. Quiet like a mountain, moving like a river. Accumulating energy is like opening a bow, and sending energy is like releasing an arrow. . . . This man in white is Qiu Qinlai, the leader of the cleaning team of my Jeddah company, and the people from Jianghu sent the beautiful names "Master Qiu" and "Master Qiu". Under the stage, applause, shouts, and screams continued.       After 1 minute and 30 seconds of Taijiquan performance of "Men should be self-improvement", Qiu Daxia began to splash ink, and at 3 minutes and 50 seconds, the refreshing fragrance of ink rushed to his face, and the red couplet had 10 characters "Harmonious Chint People, Beautiful Chinese Dream". into sight. At this time, the applause and shouting from the audience continued one after another, ups and downs.

    In order to implement the spirit of quality development of the country and Zhejiang Province, effectively promote the cultivation of the "Made in Zhejiang" brand, and continue to lead the construction of "Quality Wenzhou". At the same time, in order to connect with Chint Electric, respond to Chint's "Quality Year" activities in 2015, continue to deepen cooperation and continuously improve product quality, the company held the 2015 "Quality Month" activity mobilization meeting in the restaurant on the fifth floor on the afternoon of July 1. The conference was attended by more than 130 employees of the company, and a total of seven agendas were held at the conference.       At the meeting, Li Shicai, manager of the company's quality department, made a summary report on the quality work in the first half of 2015, and proposed quality control goals and new measures for quality management in the second half of the year. Only when there is quality can there be a market, and when there is improvement, there can be progress. Quality is the common responsibility and obligation of our employees. To produce high-quality products, we need all of us to work together. Then Zeng Tao, manager of the company's production department, made a production improvement report.       The third item of the meeting, the general manager of the company, Mr. Wen, gave a keynote mobilization speech and announced the launch of Jeddah's 2015 Quality Month. Mr. Wen talked about three opinions on "why to carry out quality month activities" and "what are the benefits of carrying out quality month activities":   1. To unify thinking and raise awareness, we must fully realize the necessity and significance of carrying out the quality month activities, and further enhance the sense of urgency and responsibility for the work of "prospering enterprises with quality".   2. Clarify tasks, strengthen measures, and carry out "Quality Month" activities well   3. Carefully organize and cooperate closely to ensure that the "Quality Month" activities are effective       In the whole mobilization speech report, Mr. Wen also emphasized some specific problems in our actual work, especially the management measures of mixing prevention. Mr. Wen also said that the quality activity month is only a point of the quality activity, and it is hoped that the improvement of the point will lead to the improvement of the overall quality! Quality work is a long-term job, and it is not an immediate result of a quality month. We will take this quality month event as an opportunity to focus on quality with great fanfare. Establish the quality awareness of "quality year by year, quality month by month, quality day by day", further improve the level of quality management, and increase the popularity and influence of the "Jida" brand.       In the fourth item of the meeting, Comrade Wang Yongxin, the company's administrative vice president, made an introduction to the quality month activities. Manager Wang said that 2015 was a crucial year for Jeddah's marketing transformation, developing new products and opening up new markets, improving quality and developing, and laying the foundation for the realization of the "Jeddah Dream". It is hoped that all employees will take this quality month activity as a new starting point, not only strengthen quality awareness, further standardize quality management, and strive to improve physical quality, so as to promote quality work to a new level.       In the fifth item of the meeting, the general manager Wen Zong personally announced the "list of authorized inspectors" and issued the inspector qualification certificate.       In the sixth item of the meeting, all the inspectors read the inspector's oath.       At the end of the meeting, a signing ceremony for launching the Quality Month activities was held. All participants sign their shining names on the red banner, sign a responsibility and dignity, and sign the determination and confidence to do a good job in quality.The mobilization of the whole quality month activities will be carried out in a harmonious and solemn atmosphere.       The meeting concluded with the beautiful conclusion of the host Ma Minna, "Everyone cares about quality, and everyone attaches importance to quality; keep quality in mind every day, and always pay attention to quality; create high-quality products and achieve satisfactory users. Quality awareness is in my heart, and product quality is in my hands. Let us be strict To control the quality, start from now, start from me. I wish our Jeddah will continue to surpass, and tomorrow will be better!" The middle ended successfully.

        At 14:30 pm on January 30, 2015, Wenzhou Jida Technology's 2014 Summary Conference and 2015 Work Mobilization Conference with the theme of "meeting new challenges together through thick and thin, and sailing to create a new situation" was successfully held in the company's restaurant. Company bosses Wen Jinpu, Wen Yongwei, Wen Xiaoqin, Wen Xiaoyan, Wu Zundeng, Huang Heling, Ni Yongsheng and all the staff, a total of 110 people (35 resigners and those who have asked for leave to go home) attended the conference. Mr. Wen Jinpu, general manager, Mr. Li Xiaoyang, assistant to general manager, and Mr. Wang Yongxin, deputy general manager of administration, made important reports and speeches at the conference respectively.       On behalf of the company's board of directors, Mr. Wen first extended his high respect and heartfelt thanks to all Jeddah employees and their families and their New Year greetings. He said that the development of Jeddah for more than ten years is inseparable from the collective labor and wisdom of the majority of employees. The future of Jeddah depends on everyone's joint efforts, standing together through thick and thin, and united as one. He sent a message to all Jeddah people to always maintain the spirit of learning and innovation, focusing on cooperation, coordination, complementarity, humility, and identity, so as to build a strong team. Excellent cohesive team. In the end, the employees were most concerned about the welfare policies (20 items in total), which were changed and added to all employees.       The whole conference was carried out in a peaceful and joyful atmosphere. This conference is another conference that unites people's hearts and gathers strength after the 2013 annual conference.       During the conference, all employees read the Company management philosophy; the team leader and workshop director swore their determination and made a letter of commitment to return to the factory in the New Year in 2015; in the award ceremony, the annual outstanding team award and outstanding employee award were awarded , Quality Award, Proposal Improvement Award, and this time also added the "Couple Concentric Award", "Thank Parents Award" and so on. The lucky draw session was even more exciting. Originally, there were 1 first prize, 1 second prize, 1 third prize, and 5 lucky prizes. Due to the harmonious and cheerful atmosphere on the scene, General Manager Wen decided on the spot to add another 1,000 yuan to the lucky draw. In the lottery, the employees who won the lottery draw lottery tickets for everyone. The lucky relay is on the scene, and all employees are filled with happy smiles. At the end of the event, the interesting content of "see the picture and guess the idiom and answer correctly, there will be a prize", and there are many prizes, so that most of the employees return with a full reward, and the sound of joy reverberated over the whole of Jeddah for a long time...       After the conference, all the staff went to the White Elephant Jiangnan Hotel for a New Year's dinner. During the New Year's dinner, the handsome men and beauties who love literature and art are more than enough star addiction, singing and dancing, and it is very lively.       Gongs and chips were staggered, laughter was loud, and everyone took pictures with their mobile phones, and the joyful atmosphere permeated the entire banquet hall.

Abstract The utility model discloses a hand-tightening screw, which comprises a screw head and a screw rod. The utility model is characterized in that: a fixing hole is arranged on the screw head, a hanging plate is matched in the fixing hole, and a connecting section is integrally arranged on one side of the hanging plate, and the connecting section is in the fixing hole. The hand screw can be easily tightened by hand.   Description hand screw technical field [0001] The utility model relates to screws, in particular to a hand screw. Background technique [0002] A hand screw is a type of screw that can realize the normal disassembly and assembly of the screw without tools, and is generally used in places that require rapid disassembly and assembly. At present, the Chinese patent of publication number CN204175749U discloses a kind of captive screw that can be disassembled and assembled quickly, and it comprises a press-fit screw sleeve, a screw, a spring and a hand-twisted lifting ring; the bottom of the press-fit screw sleeve It is provided with straight knurling, the straight knurling part is press-fitted into the opening of the connected piece, the spring is sleeved on the screw, the screw is screwed into the press-fitting screw sleeve, and the screw head is provided with a hand Screw the mounting hole of the lifting ring, and connect the lifting ring by hand to the screw head through the mounting hole. Although this kind of quick detachable captive screw can be tightened without using tools, the lifting ring is arc-shaped, and the force area of ​​the fingers is small when tightening by hand, so it is not easy to tighten. Utility model content [0004] For the deficiencies existing in the prior art, the purpose of this utility model is to provide a hand screw, which can be easily tightened by hand. The above-mentioned technical purpose of the present utility model is achieved through the following technical solutions: a kind of hand screw, including screw head and screw rod, it is characterized in that: screw head is provided with fixing hole, and in the fixing hole, there is a hanger One side of the hanging plate is integrally provided with a connecting section, and the connecting section is located in the fixing hole. [0006] Through the above-mentioned technical scheme, using the hanging plate to replace the hanging ring, when the finger is in contact with the hanging plate, there can be a larger contact area, so that the finger is relatively evenly stressed, and a large torque can be provided, which is convenient for tightening the screw. [0007] The hanger plate can be rotated along the axis of the fixing hole, and the hanger plate is provided with a circular arc groove that prevents interference with the screw head when the hanger plate rotates. Through the above-mentioned technical scheme, when do not need to use the hanging plate, the hanging plate can be made to rotate along the axis of the fixing hole, so that the hanging plate and the screw head are in the same plane, avoiding when the hanging plate keeps the vertical state and collides with the human body , causing the body to be injured. [0009] The height a of the end face of the connecting section is greater than the width b of the connecting section, and below the fixing hole is an elastic piece that interferes with the connecting section and limits the rotation range of the hanging plate. [0010] Through the above-mentioned technical scheme, when the connecting section and the hanging plate are rotated together, the shrapnel is always in a state of conflict with the connecting section. Because the height of the end face of the connecting section is greater than the width of the connecting section, when the hanging plate is rotated to be in the same plane as the screw head Due to the large contact length between the shrapnel and the end face of the connecting section, a large blocking force will be generated between the two to prevent further rotation of the hanging plate. At the same time, due to the small width of the connecting section, when the hanging plate is parallel to the screw head When it rotates to the plane perpendicular to the screw head, it will not have a large jamming force, and the normal rotation of the hanging plate can be realized. Preferably, the two surfaces parallel to the width direction of the connecting section and the hanging plate are arc surfaces. [0012] Through the above-mentioned technical solution, when the hanger plate is rotated from a state parallel to the screw head to a state perpendicular to the screw head, the clamping force generated between the connecting section and the elastic piece is small, which is convenient for the hanger plate to rotate within this range. [0013] Preferably, the hanging plate is a rectangle, and each corner of the hanging plate is a rounded corner. By above-mentioned technical scheme, the length of the hanging plate is greater than the height, and the hanging plate is generally placed between the index finger and the thumb when the hanging plate is twisted by hand, and the index finger and the thumb are respectively placed at the ends of the two surfaces of the hanging plate. The larger the length of the hanging plate, the larger the force arm between the force application point and the axis of the screw rod, which is convenient for screwing the screw. All corners of the hanging plate are rounded to avoid scratching hands when scratched. [0015] Preferably, the upper end face of the screw head is provided with a cross slot or a slot for screwing the screw with a screwdriver. [0016] Through the above technical solution, when the screw cannot be screwed out using the hanger plate, the screw can be screwed out with a screwdriver. [0017] Preferably, the head of the screw rod is provided with a threaded section, and the diameter of the threaded section is greater than the diameter of the screw rod. [0018] Through the above-mentioned technical scheme, the diameter of the threaded section is greater than the diameter of the screw rod, the strength of the threaded section can be increased, and the threaded section is prevented from being damaged due to the small threaded section, ensuring the connection strength. To sum up, the beneficial effect of the present utility model in contrast to the prior art is: by using the hanging plate to twist the screw, the contact area between the hand and the hanging plate is increased, and when the screw is screwed, more Large torque, easy to screw the screw. At the same time, a connecting section is arranged on one side of the hanging plate, and a circular arc groove is arranged in the hanging plate, so that the hanging plate can be rotated on the screw head, which is convenient for the storage of the hanging plate when the hanging plate does not need to be twisted. Set the shrapnel to limit the rotation range of the hanging plate to prevent the thread on the hanging plate and the screw from interfering and destroying the thread during transportation. Description of drawings Fig. 1 is the perspective view of embodiment; Fig. 2 is the front view of embodiment hanger; Fig. 3 is the sectional view at A-A place in Fig. 2; [0023] FIG. 4 is an outline view of the top perspective of the embodiment. Reference sign: 11, screw head; 111, shrapnel; 12, screw rod; 121, thread segment; 2, hanging plate; 21, connecting segment; 22, arc groove; 23, arc surface; 3, cross groove. Detailed ways Below in conjunction with accompanying drawing, the utility model is described in further detail. This specific embodiment is only the explanation to the present utility model, it is not the limitation of the present utility model, those skilled in the art can make the modification without creative contribution to the present embodiment as required after reading this specification, but as long as Within the scope of the claims of the present utility model, it is protected by the patent law. As shown in Figure 1, a kind of hand screw, comprises screw head 11 and screw rod 12, is provided with fixing hole on screw head 11, is matched with hanging plate 2 in the fixing hole, and one side of hanging plate 2 is integrally provided with The connecting section 21, the connecting section 21 is located in the fixing hole. In this way, the hanging plate 2 is used to replace the hanging ring, and the fingers and the hanging plate 2 can have a larger contact area, so that the fingers are more evenly stressed, and a large torque can be provided, which is convenient for tightening the screw. The hanging plate 2 can rotate along the fixed hole axis at the same time, and the hanging plate 2 is provided with an arc groove 22 that interferes with the screw head 11 when the hanging plate 2 is rotated, and the hanging plate 2 can be made when the hanging plate 2 is not needed. 2. Rotate along the axis of the fixing hole, so that the hanging plate 2 and the screw head 11 are in the same plane, so as to avoid the human body being injured when the hanging plate 2 is kept vertical and collides with the human body. [0029] In addition, as shown in FIG. 2 and FIG. 3, the height a of the end face of the connecting section 21 is set to be greater than the width b of the connecting section 21, and there is an elastic piece 111 under the fixing hole that interferes with the connecting section 21 to limit the rotation range of the hanging plate. In this way, when the connecting section 21 and the hanging plate 2 are rotated together, the elastic piece 111 is always in a state of conflict with the connecting section 21. Since the height of the end face of the connecting section 21 is greater than the width of the connecting section 21, when the hanging plate 2 rotates to the position where the screw head 11 is connected When the elastic sheet 111 and the end face of the connecting section 21 are in the same plane, the contact length is relatively large, so a large blocking force will be generated between the two, preventing further rotation of the hanging plate 2. At the same time, the width of the connecting section 21 is small, so When the hanging plate 2 rotates from a state parallel to the screw head 11 to a plane perpendicular to the screw head 11 , there will be no large jamming force, and the normal rotation of the hanging plate 2 can be realized. [0030] As shown in FIG. 1 and FIG. 4 , the two surfaces parallel to the width direction of the connecting section 21 and the hanging plate 2 are arc surfaces 23 . In this way, when the hanger plate 2 rotates from a state parallel to the screw head 11 to a state perpendicular to the screw head 11, the blocking force generated between the connecting section 21 and the elastic piece 111 is small, which is convenient for the hanger plate 2 to rotate within this range . At the same time, when the hanging plate 2 rotates, the elastic pieces 111 basically remain in a stationary state, so as to prevent the elastic pieces 111 from being repeatedly deformed, causing the elastic pieces 111 to be broken and unable to limit the position. [0031] As shown in Figure 2, the hanging plate 2 is preferably a rectangle, and each corner of the hanging plate 2 is set to be rounded. Hanging plate 2 is a rectangle, and the length of hanging plate 2 is greater than the height. When screwing hanging plate 2 by hand, generally place hanging plate 2 between the index finger and the thumb, and make the index finger and thumb respectively on the two sides of hanging plate 2. The longer the length of the hanger plate 2, the larger the force arm between the force application point and the axis of the screw rod 12, which is convenient for screwing the screw. All corners of the hanging plate 2 are rounded, so that scratches can be avoided when scratching occurs. [0032] In addition, as shown in FIG. 4 , the upper end surface of the screw head 11 is provided with a cross groove 3 that cooperates with a screwdriver to turn the screw. In this way, when the screw cannot be screwed out by using the hanging plate 2, the screw can be screwed out with a screwdriver. The screw head 11 can also be a slotted slot or a slot that combines the slotted slot and the cross slot 3 . [0033] At the same time, the head of the screw rod 12 is provided with a threaded section 121, and the diameter of the threaded section 121 is larger than the diameter of the screw rod 12. In this way, the strength of the threaded section 121 can be increased, and the threaded section 121 can be prevented from being damaged due to the small size of the threaded section 121, thereby ensuring the connection strength. [0034] The above is only an exemplary embodiment of the present utility model, rather than being used to limit the scope of protection of the present utility model, the scope of protection of the present utility model is determined by the appended claims. Claims (5) Hide Dependent 1. a hand screw, comprising screw head (11) and screw rod (12), it is characterized in that: screw head (11) is provided with fixing holes, the fixing holes are equipped with hanger plate (2), hanger plate ( 2) One side is provided with a connecting section (21), the connecting section (21) is located in the fixing hole, the hanger plate (2) can be rotated along the axis of the fixing hole, and the hanger plate (2) is provided with an avoidance hanger plate (2). 2) The circular arc groove (22) that interferes with the screw head (11) during rotation, the connecting section

Abstract The utility model discloses an adjusting screw. The adjusting screw comprises a head provided with an external thread and a tail without an external thread. The outer diameter of the tail without an external thread is larger than the bottom diameter of the head provided with the external thread or outer diameter. The end surface of the tail is spherical or conical, and the end surface of the head is provided with an adjustment groove for adapting the adjustment tool. The adjustment groove is an inner hexagonal groove, a straight-shaped groove, a cross-shaped groove, a quadrangular groove, a triangular groove, a five-star-shaped groove or a quincunx-shaped groove. In the utility model, since the outer diameter of the tail without external thread is larger than the bottom diameter or the outer diameter of the head provided with external thread, a blocking ring is formed at the junction of the tail and the head, so that the nut matched with it is formed. It cannot fall off from the tail, which improves the safety and reliability of the adjusting screw during use. adjusting screw technical field [0001] The utility model relates to a screw, in particular to an adjustment screw. Background technique In mechanical equipment, adjusting screw is often used to adjust and locate the position of elastic part, for example, in small circuit breaker, the position of bimetal and elastic steel sheet is adjusted by adjusting screw. However, due to the limitation of the space of the use occasion, the length of the adjustment screw is generally short. During installation and use, due to vibration or improper adjustment, the tail of the adjustment screw is easy to fall off from the nut, resulting in adjustment and positioning failure. In addition, the falling off Leaving the adjusting screw in the circuit breaker also creates a safety hazard. Utility model content The technical problem to be solved by this utility model is to solve the problem that the adjustment screw is easy to fall off from the nut. In order to solve the above-mentioned technical problem, the technical scheme adopted in the present utility model is to provide a kind of adjustment screw, and this adjustment screw comprises the head part that is provided with external thread and the tail part that is not provided with external thread, and the outer diameter of tail part is larger than head part bottom or outer diameter. In above-mentioned scheme, the front end face of described tail is in spherical shape, conical shape or stepped shaft shape with small outside and inside big. [0006] In the above-mentioned scheme, the tail end face of the head is provided with an adjustment groove for adapting the adjustment tool. In such scheme, described adjustment groove is inner hexagonal groove, in-line groove, cruciform groove, quadrangular groove, triangular groove, five-star groove or quincunx groove. The utility model, because the outer diameter of the tail that is not provided with external thread is greater than the bottom diameter or the outer diameter of the head that is provided with external thread, therefore at the junction of the tail that is not provided with external thread and the head that is provided with external thread A blocking ring is formed at the top, so that the matching nut cannot fall off from the tail, which improves the safety and reliability of the adjusting screw during use. Description of drawings Fig. 1 is the structural representation of the present utility model. Detailed ways Below in conjunction with accompanying drawing, the utility model is described in detail. As shown in Figure 1, the adjusting screw 1 that the utility model provides comprises the head 12 that is provided with external thread and the tail 11 that is not provided with external thread, and the outer diameter of the tail 11 that is not provided with external thread is greater than that provided with external thread The bottom or outer diameter of the head 12. The end portion of the tail portion 11 is spherical, conical or stepped shaft shape with a small outside and a large inside, and the end surface of the head 12 is provided with an adjustment groove 14 for adapting the adjustment tool. Described adjustment groove 14 is a hexagonal groove, a straight groove, a cross groove, a quadrangular groove, a triangular groove, a five-star groove or a quincunx groove. The utility model, because the outer diameter of the tail part 11 that is not provided with external thread is greater than the bottom diameter or the outer diameter of the head 12 that is provided with external thread, therefore in the tail part 11 that is not provided with external thread and the head that is provided with external thread The junction of the part 12 forms a blocking ring 13, so that the matching nut cannot fall off from the tail part 11, but can only be screwed in and out from the head in one direction, which solves the problem of the adjusting screw 1 falling off from the nut, even if It will not fall off when working on machines with high-speed vibration. [0013] The specific application of the adjusting screw in the circuit breaker is described below. After the utility model is combined with the nut, it is installed in the circuit breaker, wherein the nut is installed in the positioning slot corresponding to its shape and size and uses the nut as a positioning, and the adjustment screw is not provided with an external thread tail and the metal in the circuit breaker. The elastic sheet is tight and has elastic contact, and the metal elastic sheet is always applied to the end of the adjusting screw with a kind of elastic force. Therefore, under normal conditions, the adjusting screw will not move and fall out from the head with external threads, but can only move in the direction of the tail without external threads. The outer diameter of 11 is larger than that of the head 12 provided with external threads, so that a blocking ring 13 is formed at the junction of the tail 11 without external threads and the head 12 with external threads, preventing the nut from continuing to move and preventing The nut comes off the tail, which ensures the safe use of the circuit breaker. Beneficial effect of the present utility model is: (1), can make product meet different customer demands by the mode of changing thread specification and pitch specification, and the scope of application of product is more extensive; (2), adjusting screw and nut combination can provide better adjustment and anti-dropping function, even if working on the machine of high-speed vibration, it will not fall off, ensuring the working stability of circuit breaker; (3), because this adjusting screw shape only realizes by changing mould, therefore does not increase the manufacturing cost of product, has good development prospect. The present utility model is not limited to above-mentioned best embodiment, anyone should know the structural change made under the enlightenment of the present utility model, all have identical or similar technical scheme with the present utility model, all fall into the present utility model within the scope of the new protection. Claims (4) Hide Dependent The adjusting screw is characterized in that the adjusting screw comprises a tail part with an external thread on the head and without external thread, and the outer diameter of the tail part is larger than the bottom diameter or the outer diameter of the head part. 2. The adjusting screw according to claim 1, characterized in that the front end surface of the tail is in the shape of a spherical surface, a conical shape, or a stepped shaft shape with a small outside and a large inside. 3. The adjusting screw according to claim 1 or 2, characterized in that an adjusting groove for fitting an adjusting tool is provided on the rear end face of the head. 4. The adjusting screw according to claim 3, wherein the adjusting groove is an inner hexagonal groove, a straight-line groove, a cross-shaped groove, a quadrangular groove, a triangular groove, a five-star groove or a quincunx-shaped groove groove.