Adjustable length forceps

Abstract

This utility model discloses an adjustable-length pliers, relating to the field of pliers technology. It includes a pliers body and a pliers head. The pliers head is detachably connected to the front end of the pliers body, and a locking block is fixed to the top of the pliers body. This adjustable-length pliers utilizes a nested design of a T-shaped slide rail and a matching groove, allowing the extension handle to slide precisely along the longitudinal direction of the pliers bar. The lateral limiting structure on both sides of the slide rail effectively prevents axial displacement or disengagement of the extension handle, ensuring a smooth and reliable adjustment process. The evenly distributed third threaded holes on the slide rail surface and the corresponding fourth threaded holes in the groove, combined with the through-locking of second hexagonal socket bolts, achieve rigid fixation of the extension handle at multiple length settings. This facilitates adjustment of the pliers bar length according to the needs of different working environments, thereby meeting the flexible adaptation requirements of different working depths and significantly improving the practicality and operational efficiency of the pliers.

Description

Technical Field

[0001] This utility model relates to the field of pliers technology, specifically to a pair of pliers with adjustable length. Background Technology

[0002] Pliers are a common hardware tool widely used in industry, agriculture, maintenance and other fields. They are mainly used to clamp, bend and cut metal wires and other items.

[0003] However, existing pliers still have some problems when used: For example, a pair of pliers with application number CN99224464.1 has a component that makes up the gripping jaws that is a frustum shape that tapers outwards, and another component that has a face made into a concave arc shape to match the frustum shape. This type of pliers not only has the function of gripping objects and cutting metal wires, but it can also directly bend smooth metal wires with large arcs, such as circles, and ensure that the bent metal wires are smooth and without marks. Most existing pliers have a fixed length. In actual operation, the required length of pliers varies depending on the working environment and the object being worked on. Shorter pliers are needed when working in a confined space, while longer pliers are needed when performing long-distance clamping or operation. Fixed-length pliers cannot meet the needs of different scenarios, and users often need to equip themselves with a variety of pliers of different lengths, which not only increases costs but also makes them inconvenient to carry. Therefore, we propose an adjustable-length pair of pliers to address the problems mentioned above. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable-length pair of pliers to solve the problem mentioned in the background art that most pliers have a fixed length. In actual operation, the required length of the pliers varies depending on the working environment and the object being worked on. Shorter pliers are needed when working in a narrow space, while longer pliers are needed when performing long-distance clamping or operation. Fixed-length pliers cannot meet the needs of different scenarios, and users often need to equip themselves with a variety of pliers of different lengths, which not only increases costs but also makes them inconvenient to carry.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an adjustable-length pliers, comprising a pliers body and a pliers head, wherein the pliers head is detachably connected to the front end of the pliers body, a locking block is fixed to the top end of the pliers body, and a locking groove is provided at the end of the pliers head to engage with the locking block. A slide rail is fixed to the outer side of the pliers bar of the pliers body, and a plurality of third threaded holes are evenly provided on the outer surface of the slide rail. An extension handle is fitted onto the outer surface of the pliers bar of the pliers body, and a sliding groove adapted to the slide rail is provided on the outer side of the extension handle. A plurality of fourth threaded holes corresponding to the third threaded holes are evenly provided on the inner surface of the sliding groove. A plurality of second internal hex bolts are threaded through and threadedly connected to the middle of the third threaded holes and the fourth threaded holes.

[0006] By adopting the above technical solution, the extension handle can be adjusted by sliding the slide rail and the slide groove. Then, the second internal hex bolt passes through the third threaded hole on the slide rail surface and the fourth threaded hole on the extension handle to lock the threads, thereby fixing the effective working length of the pliers. It can quickly adapt to the needs of different working depths and avoid frequent tool changes. At the same time, the detachable design of the locking block and the locking groove makes it easy to replace the pliers head, improving the versatility of the tool and the efficiency of operation.

[0007] Preferably, the card block has a first threaded hole in the middle, and the pliers head has a second threaded hole in the middle and at the card slot. The first threaded hole and the second threaded hole are threaded through and connected to a first internal hex bolt.

[0008] By adopting the above technical solution, by setting the first threaded hole and the second threaded hole at the corresponding positions of the card block and the card slot, and using the first internal hex bolt to connect through the thread, the pliers head and the pliers body form a rigid fixed structure, which avoids the pliers head from loosening or falling off due to force during operation. The connection stability between the pliers head and the pliers body is strengthened by bolt locking, and at the same time, it is convenient to disassemble and replace the pliers head according to the usage needs, thereby improving the usage efficiency of the pliers body.

[0009] Preferably, the slide rail has a T-shaped structure, and the slide groove is adapted to the slide rail and is in a close sliding connection.

[0010] The above technical solution uses a T-shaped slide rail and a matching slide groove to form a nested sliding connection. Its lateral flange can restrict the axial disengagement of the extension handle, allowing it to slide linearly along the longitudinal direction of the clamp bar, thereby ensuring the structural stability during telescopic adjustment. The T-shaped slide rail design prevents the extension handle from shifting or loosening through mechanical limiting, while the fitted sliding structure reduces frictional resistance during adjustment, making length adjustment smoother and more precise, taking into account both ease of operation and connection reliability.

[0011] Preferably, the third threaded holes are evenly distributed laterally along the surfaces of the two flanges of the slide rail, and the fourth threaded holes are designed to correspond one-to-one with the third threaded holes.

[0012] Using the above technical solution, the third threaded hole is evenly distributed laterally along both sides of the slide rail flange to form a multi-position positioning point. The fourth threaded hole is designed accordingly, so that the second internal hex bolt can be accurately inserted into any pair of threaded holes. The extension handle is fixed at the preset length position by thread locking. The horizontal multi-hole layout provides more refined length adjustment positions to meet the precise adaptation requirements of different working depths. At the same time, the symmetrical design on both sides enhances the structural stability during locking and avoids the extension handle from deflecting or loosening under force.

[0013] Preferably, the four corners of the extension handle are rounded.

[0014] By adopting the above technical solution, the four corners of the extension handle are designed with rounded corners. The smooth transition of the arc structure eliminates the stress concentration points that are easy to be generated by traditional right-angled edges. At the same time, it reduces the risk of sharp collisions when the tool comes into contact with the human body or the working environment. The rounded corner design not only improves the grip comfort and avoids scratching the hand or scratching other objects during operation, but also reduces the probability of damage caused by bumps when the tool is working in a confined space, extending its service life and enhancing safety.

[0015] Preferably, the outer surface of the extension handle is inlaid with an anti-slip pad made of rubber, and the outer surface of the anti-slip pad is provided with a grid-like anti-slip texture.

[0016] By adopting the above technical solution, the rubber anti-slip pad increases the static friction between the hand and the extended handle through its high coefficient of friction. Combined with the grid-like anti-slip texture, it further expands the contact area and wicks away sweat, forming a multi-directional anti-slip structure. This significantly improves the grip stability when hands are wet or under heavy load, preventing tools from slipping and causing safety hazards. At the same time, the elastic cushioning properties of rubber can also reduce the pressure on the hands during long-term use and improve operating comfort.

[0017] Compared with the prior art, the beneficial effects of this utility model are: 1. The nested design of the T-shaped slide rail and the matching slide groove allows the extension handle to slide precisely along the longitudinal direction of the pliers bar. The lateral limiting structure on both sides of the slide rail effectively prevents the extension handle from shifting axially or coming off, ensuring a smooth and reliable adjustment process. The evenly distributed third threaded holes on the slide rail surface and the corresponding fourth threaded holes in the slide groove, together with the through locking of the second internal hex bolt, achieve rigid fixation of the extension handle at multiple length positions. This allows for adjustment of the handle length of the pliers body according to the usage requirements of different working environments, thereby meeting the flexible adaptation requirements of different working depths and significantly improving the practicality and operating efficiency of the pliers. 2. The clamping block at the top of the pliers body engages with the groove at the end of the pliers head, achieving quick positioning and initial fixation. This, combined with the threaded locking of the first hexagonal socket bolt through the first and second threaded holes, effectively limits the lateral displacement of the pliers head using the clamping structure. Furthermore, the axial preload of the bolt eliminates connection gaps, ensuring that the pliers head remains rigidly synchronized with the pliers body when subjected to high-intensity shearing or torsional forces, preventing loosening or detachment. Simultaneously, the detachable design allows for quick replacement of different pliers head sizes according to operational needs, significantly improving the tool's applicability and efficiency, and meeting the diverse operational requirements of various scenarios. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of this utility model from the front view; Figure 2 This is a schematic diagram of the pliers body structure of this utility model; Figure 3 This is a schematic diagram of the connection structure between the pliers head and the pliers body of this utility model; Figure 4 This is a schematic diagram of the connection structure between the extension handle and the pliers body of this utility model.

[0019] In the diagram: 1. Pliers body; 2. Pliers head; 3. Clamping block; 4. First threaded hole; 5. Clamping groove; 6. Second threaded hole; 7. First hex bolt; 8. Slide rail; 9. Third threaded hole; 10. Extension handle; 11. Slide groove; 12. Fourth threaded hole; 13. Second hex bolt; 14. Anti-slip pad. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Please see Figures 1-4 This utility model provides a technical solution: an adjustable-length pair of pliers, including a pliers body 1 and a pliers head 2. The pliers head 2 is detachably connected to the front end of the pliers body 1, and a locking block 3 is fixed to the top end of the pliers body 1. The end of the pliers head 2 has a locking groove 5 that engages with the locking block 3. A first threaded hole 4 is formed in the middle of the locking block 3, and a second threaded hole 6 is formed in the middle of the pliers head 2, located at the locking groove 5. A first internal hex bolt 7 is threaded through the middle of the first threaded hole 4 and the second threaded hole 6.

[0022] The locking block 3 fixed at the top of the pliers body 1 and the locking groove 5 at the end of the pliers head 2 are initially positioned by an embedded engagement. After the first threaded hole 4 in the middle of the locking block 3 is precisely aligned with the second threaded hole 6 at the locking groove 5, the first internal hex bolt 7 passes through both and is threaded and locked. This not only uses the engagement structure to limit the lateral displacement of the pliers head 2, but also eliminates the connection gap through the axial preload of the bolt, ensuring that the pliers head 2 remains rigidly synchronized with the pliers body 1 when subjected to shearing or torsional forces. At the same time, the countersunk design of the first internal hex bolt 7 avoids the exposed parts from hooking foreign objects in the working environment, taking into account the connection strength, ease of disassembly and assembly, and safety of use. Ultimately, it realizes the quick replacement and stable fixation of the pliers head 2, enhances the applicability of the pliers body 1, and facilitates the replacement of different specifications of pliers head 2 according to actual use needs, improving usage efficiency and meeting the needs of different scenarios.

[0023] The pliers body 1 has a slide rail 8 fixed to the outer side of the pliers bar. The outer surface of the slide rail 8 has several evenly spaced third threaded holes 9. An extension handle 10 is fitted onto the outer surface of the pliers bar. The outer side of the extension handle 10 has a groove 11 that matches the slide rail 8. The inner surface of the groove 11 has several evenly spaced fourth threaded holes 12 corresponding to the third threaded holes 9. Several second hexagon socket head cap screws 13 are threaded through and connected to the middle of the third threaded holes 9 and fourth threaded holes 12. The slide rail 8 has a T-shaped structure, and the groove 11 fits and slides snugly against the slide rail 8. The third threaded holes 9 are evenly distributed laterally along the two flange surfaces of the slide rail 8, and the fourth threaded holes 12 correspond one-to-one with the third threaded holes 9. The four corners of the extension handle 10 are rounded. The outer surface of the extension handle 10 is inlaid with an anti-slip pad 14 made of rubber, and the outer surface of the anti-slip pad 14 has a grid-like anti-slip texture.

[0024] The outer side of the pliers body 1 is nested and slidably connected to the extension handle 10 via a T-shaped slide rail 8 and a matching groove 11. The transverse flange structure of the slide rail 8 restricts the axial disengagement of the extension handle 10, ensuring that it can only slide linearly along the longitudinal direction of the pliers body. The third threaded holes 9 evenly distributed on the surface of the two flanges of the slide rail 8 are aligned with the corresponding fourth threaded holes 12 in the groove 11 and locked through by the second internal hex bolt 13, achieving rigid fixation of the extension handle 10 at multiple length positions to meet the precise adjustment requirements of different working depths. The rounded corners of the extension handle 10 eliminate sharp edges, preventing hand scratches or scraping of the working surface during operation. At the same time, the rubber anti-slip pad 14 and its grid pattern significantly improve the grip stability under wet hands or high-load conditions by increasing the coefficient of friction and sweat-wicking function. Finally, a multi-functional pliers structure is formed that integrates adjustable length, stable connection, safe operation and comfort.

[0025] Working principle: For this type of adjustable-length pliers, when the pliers are in operation, the locking block 3 at the top of the pliers body 1 engages with the locking groove 5 of the pliers head 2 to achieve initial positioning. The first hex socket bolt 7 passes through the first threaded hole 4 and the second threaded hole 6 to lock, ensuring that the pliers head 2 and the pliers body 1 are rigidly synchronized. When the length needs to be adjusted, the extension handle 10 slides longitudinally along the T-shaped slide rail 8 of the pliers bar through the slide groove 11. The lateral flange of the slide rail 8 restricts its axial disengagement. When the extension handle 10 slides to the target position, the second hex socket bolt 13 passes through the corresponding third threaded hole 9 on the slide rail 8 and locks with the fourth threaded hole 12 in the slide groove 11 to achieve multiple fixed length positions. The rounded corner design of the extension handle 10 avoids scratching the hands, and the grid pattern of the rubber anti-slip pad 14 increases the friction to improve grip stability. Finally, through the coordinated use of the marked components, the pliers head 2 can be quickly replaced, the length can be accurately adjusted, and safe and comfortable operation can be achieved.

[0026] This completes a series of tasks. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pincer with adjustable length of use, comprising a pincer body (1) and a pincer head (2), characterized in that: The front end of the pliers body (1) is detachably connected to a pliers head (2). A locking block (3) is fixed to the top of the pliers body (1). A locking groove (5) is opened at the end of the pliers head (2) to engage with the locking block (3). A slide rail (8) is fixed to the outside of the pliers bar of the pliers body (1). Several third threaded holes (9) are evenly opened on the outer surface of the slide rail (8). An extension handle (10) is sleeved on the outer surface of the pliers bar of the pliers body (1). A slide groove (11) that matches the slide rail (8) is opened on the outside of the extension handle (10). Several fourth threaded holes (12) corresponding to the third threaded holes (9) are evenly opened on the inner surface of the slide groove (11). Several second internal hex bolts (13) are threaded through and threaded to the middle of the third threaded holes (9) and the fourth threaded holes (12).

2. The adjustable-length pliers according to claim 1, characterized in that: The card block (3) has a first threaded hole (4) in the middle, and the pliers (2) has a second threaded hole (6) in the middle and located in the card slot (5). The first threaded hole (4) and the second threaded hole (6) are connected by a first internal hex bolt (7).

3. The adjustable-length pliers according to claim 1, characterized in that: The slide rail (8) has a T-shaped structure, and the slide groove (11) is adapted to the slide rail (8) and is in a close sliding connection.

4. The adjustable-length pliers according to claim 1, characterized in that: The third threaded hole (9) is evenly distributed laterally along the two sides of the flange surface of the slide rail (8), and the fourth threaded hole (12) is designed to correspond one-to-one with the third threaded hole (9).

5. The adjustable-length pliers according to claim 1, characterized in that: The four corners of the extension handle (10) are rounded.

6. The adjustable-length pliers according to claim 1, characterized in that: The outer surface of the extension handle (10) is inlaid with an anti-slip pad (14) made of rubber material, and the outer surface of the anti-slip pad (14) is provided with a grid-like anti-slip pattern.

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