An adjustable pliers

Abstract

The present invention discloses an adjustable pliers, comprising a first handle and a second handle, both of which are provided with a clamping part at the front end, the two clamping parts forming a jaw, the first handle and the second handle being arranged to intersect and relatively fixed by a connecting mechanism, characterized in that the second handle has a long strip tooth groove at the position of the connecting mechanism, the inner side of the tooth groove has a tooth belt, the connecting mechanism comprises a positioning clamping tooth arranged in the tooth groove and a linkage mechanism connected to the positioning clamping tooth, the positioning clamping tooth has a side tooth, which is engaged with the tooth belt on the tooth groove, the linkage mechanism is arranged to drive the positioning clamping tooth to rotate, so that the side teeth on the positioning clamping tooth are disengaged from the engagement with the tooth belt, so that the first handle can move along the tooth groove relative to the second handle through the movement of the connecting mechanism, the linkage mechanism comprises a trigger shaft connected to the positioning clamping tooth, and the trigger shaft has a trigger part. The adjustable pliers of the present invention have the advantages that the right handle can be directly pushed, and the one-way quick adjustment is performed, which is convenient and labor-saving compared with ordinary water pump pliers which need to be adjusted with both hands.

Description

Technical Field

[0001] The invention relates to a pair of pliers, and more particularly to a pair of pliers with jaw sizes that can be quickly adjusted. Background Art

[0002] Conventional pliers have two intersecting arms that can rotate around a pivot at the intersection to clamp an object. A jaw for clamping an object is formed above the intersection, and a gripper handle is formed below the intersection. However, the size of the jaw opening of such pliers is fixed, and the size range of objects that can be clamped is limited.

[0003] Therefore, a pair of pliers with adjustable jaw size has emerged, as disclosed in US Pat. No. 5,845,551. In the pair, a hollow long tooth groove is formed at the middle position of one pliers arm at the intersection, and the inner wall of the tooth groove has teeth distributed along the inner wall. The other pliers arm can gradually move a certain distance along the teeth on the inner wall of the tooth groove at the intersection, and can be fixed to any tooth, so that the size of the jaws can be adjusted.

[0004] However, this type of pliers is bidirectionally adjustable, that is, the pivot at the intersection has an adjustment switch, and when the switch is turned on, the two pliers arms can move relative to each other. When the switch is turned off, the positions of the two pliers arms are relatively fixed, reaching a state that can be used normally. The disadvantage of this design is that it is inconvenient to use. When using, first turn on the switch and keep the switch in the open state, open the jaws larger than the size of the clamped object, and then keep the switch in the open state to gradually narrow the jaws to a position that can just clamp the object. The process of expanding and shrinking the jaws requires that the switch be maintained in the open state so that the size of the jaws can be adjusted. This is very inconvenient for the user, so further improvements need to be made. Not only does it not need to hold the switch all the time during the process of changing the jaws, but the design of the switch is also simpler and more convenient. Summary of the invention

[0005] The purpose of the present invention is to provide a pair of pliers that only require an adjustment switch to adjust the size of the jaws in one direction, while the size of the jaws can be adjusted in the other direction without using an adjustment switch, thereby stabilizing the jaws on the object to be clamped.

[0006] Another object of the present invention is to provide a pair of pliers with adjustable jaw size, wherein the adjustment switch is simple in design and easy to use.

[0007] 14. The adjustable pliers as claimed in claim 13, wherein the first handle and the second handle are provided with a first clamping part at the front end thereof, and the second clamping part is provided at the front end of the second handle, the first clamping part and the second clamping part form a jaw, the first handle and the second handle are arranged to intersect and are relatively fixed by a connecting mechanism, characterized in that the second handle has a long strip of tooth groove at the position of the connecting mechanism, the inner side of the tooth groove has a tooth belt, the connecting mechanism includes a positioning tooth arranged in the tooth groove and a linkage mechanism connected to the positioning tooth groove, the positioning tooth has side teeth that mesh with the tooth belt on the tooth groove, the linkage mechanism is arranged to drive the positioning tooth groove to rotate so that the side teeth on the positioning tooth groove are disengaged from the meshing with the tooth belt, so that the first handle can move along the tooth groove relative to the second handle through the movement of the connecting mechanism, and the linkage mechanism includes a trigger shaft connected to the positioning tooth shaft, and the trigger shaft has a trigger part.

[0008] Furthermore, the toothed belt is provided with one-way ratchet teeth.

[0009] Furthermore, the trigger shaft is arranged in the through hole of the positioning latch, and the trigger portion is a pressing portion of the trigger shaft extending to the outside of the surface of the first handle.

[0010] Furthermore, the linkage mechanism also includes a needle roller, which is arranged on the trigger shaft at the position of the positioning tooth, one end of the needle roller extends from the side of the trigger shaft, and the other end of the needle roller extends to the inclined surface of the positioning tooth.

[0011] Furthermore, the inclined surface is located at the upper side of the positioning latch through hole, and the side teeth of the positioning latch are located at one side of the lower side of the positioning latch through hole.

[0012] Furthermore, the inclined surface gradually decreases from one side of the side teeth of the positioning latch gear toward the other side.

[0013] Furthermore, the needle roller may be fixedly connected to or integrated with the trigger shaft.

[0014] Furthermore, one end of the needle roller extends into a hole on the side of the trigger shaft and is fixedly connected to the trigger shaft.

[0015] Furthermore, the cross-sectional shape of the trigger shaft is a circle with a notch.

[0016] Furthermore, the linkage mechanism also includes a sheet body having a hollow hole so that it can be sleeved on the trigger shaft, and the hollow hole is adapted to the cross-sectional shape of the trigger shaft.

[0017] Furthermore, the first handle has a side hole on the side wall at the connecting mechanism, which can accommodate the corresponding position of the second handle to pass through it, forming a first part of the first handle located on the second handle, and a second part of the first handle located under the second handle, wherein the trigger shaft passes through the first part of the first handle and then through the tooth groove of the second handle, and then through the second part of the first handle.

[0018] Furthermore, the first end of the trigger shaft extends to a first part on one side of the first handle, and the second end extends to a second part on the other side of the first handle, wherein the trigger part is located outside the first part and is fixed to the trigger shaft through a fixing element on the outside of the second part.

[0019] Furthermore, the positioning latch has a fixing portion and an elastic member on the other side of the lower side of the through hole opposite to the side teeth, and the elastic member is connected to the fixing portion and abuts against the second handle.

[0020] Furthermore, the fixing portion is a spring hole, the elastic member is a spring, and the spring is arranged in the spring hole.

[0021] Furthermore, the planes on the inner sides of the first clamping part and the second clamping part intersect at an angle, forming a gap between the first clamping part and the second clamping part, and the inner sides of the first clamping part and the second clamping part are provided with stripes to facilitate clamping and biting.

[0022] Furthermore, the first clamping portion or the second clamping portion may be integrally formed with the first handle or the second handle, or may be connected together by connecting means.

[0023] Furthermore, the sheet is arranged between the positioning latch and the fixing element.

[0024] Furthermore, the sheet body is located inside the tooth groove, and the outer edge of the sheet body is square and matches the inner edge of the tooth groove.

[0025] Furthermore, the linkage mechanism also includes a compression spring, which is arranged in the outer recess of the first part of the first handle and contacts the trigger part.

[0026] Another jaw shape is that the first clamping part and the second clamping part are both set as planes, and the inner sides are provided with stripes, and the inner planes of the first clamping part and the second clamping part are parallel.

[0027] The invention has the advantages that the right handle can be directly pushed for one-way quick adjustment, which is more convenient and labor-saving than ordinary water pump pliers which require both hands to adjust. The button can be integrally formed with the needle roller, which can save processing costs and improve production efficiency.

[0028] The new jaw shape of the present invention is more consistent with the shape of the hexagonal nut. Compared with ordinary water pump pliers (which cannot better fit larger-sized hexagonal nuts), this product can better fit all sizes of hexagonal nuts within the gear range; one-way quick gear adjustment, compared with ordinary water pump pliers that require both hands to adjust, is convenient and labor-saving; with this structure, the product tooth engagement is more stable and more convenient in operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of a preferred embodiment of the present invention.

[0030] Figure 2 It is an exploded view of a preferred embodiment of the present invention.

[0031] Figure 3 It is an exploded view from another angle of a preferred embodiment of the present invention.

[0032] Figure 4 It is an exploded view of a positioning latch tooth of a preferred embodiment of the present invention.

[0033] Figure 5 It is a synthetic diagram of the positioning latch teeth of a preferred embodiment of the present invention.

[0034] Figure 6 It is a stereoscopic diagram of a trigger shaft according to a preferred embodiment of the present invention.

[0035] Figure 7 It is a cross-sectional view of a preferred embodiment of the present invention, wherein the trigger shaft is in an initial state.

[0036] Figure 8 It is a cross-sectional view of a preferred embodiment of the present invention, wherein the trigger shaft is in a pressed down state.

[0037] Fig. 9 It is a schematic diagram of jaw opening of a preferred embodiment of the present invention.

[0038] Fig.10 It is a schematic diagram of the jaws clamping an object according to a preferred embodiment of the present invention.

[0039] Fig.11 It is a side view of a preferred embodiment of the present invention, wherein the side teeth of the positioning latch are in a meshing state.

[0040] Fig.12 It is a side view of a preferred embodiment of the present invention, wherein the side teeth of the positioning latch are in a non-engaged state.

[0041] Fig.13 It is a schematic diagram of a second specific embodiment of the present invention.

[0042] Fig.14It is an exploded view of a second specific embodiment of the present invention.

[0043] Fig.15 It is an exploded view from another angle of the second specific embodiment of the present invention.

[0044] Fig.16 It is a partially enlarged exploded view of the second specific embodiment of the present invention. DETAILED DESCRIPTION

[0045] like Figure 1-12 As shown, the present invention provides a preferred embodiment. An adjustable pliers includes a first handle 5 and a second handle 9, wherein the first handle 5 is provided with a first clamping portion 2 at the front end, and the second handle 9 is provided with a second clamping portion 1 at the front end, wherein the first clamping portion 2 and the second clamping portion 1 form a jaw, wherein the first handle and the second handle are arranged to intersect and are relatively fixed by a connecting mechanism, wherein the second handle has a long strip tooth groove 91 at the position of the connecting mechanism, and the inner side of the tooth groove 91 has a tooth belt 92, wherein the connecting mechanism includes a positioning tooth 6 arranged in the tooth groove 91 and a linkage mechanism connected to the positioning tooth 6, wherein the positioning tooth 6 has a side tooth 61, which is engaged with the tooth belt 92 distributed on the tooth groove 91, and the linkage mechanism drives the positioning tooth 6 to rotate and disengage from the engagement with the tooth belt 92, so that the first handle 5 can move along the tooth groove 91 relative to the second handle 9 by following the movement of the connecting mechanism to change the size of the jaw, wherein the teeth on the tooth belt 92 are one-way ratchet teeth, that is, the teeth are all obliquely oriented in one direction, such as Figure 1 In this way, when the force is applied in the opposite direction of the tooth inclination, that is, the opposite direction of the arrow, the toothed belt 92 and the positioning latch 6 have a barb between them, and the two need to be separated by external force to make the positioning latch 6 slide in the tooth groove 91. In the direction of the tooth inclination, that is, in the direction of the arrow, the toothed belt 92 will push the positioning latch 6 to overcome the elastic force and automatically disengage from the teeth on the toothed belt 92 without the intervention of external force, thereby achieving unidirectional rapid sliding.

[0046] Specifically, the one-way ratchet means that the teeth of the toothed belt 92 extend from the groove edge to the oblique upward direction, such as Figure 1 When the jaws need to be enlarged, that is, the first handle 5 is pulled downward from the top of the tooth groove 91 (i.e., moves in the opposite direction of the arrow), the trigger part 71 of the linkage mechanism needs to remove the engagement of the positioning tooth 6 with the tooth belt 92. When the first handle 5 is pulled upward from the bottom of the tooth groove 91 (i.e., moves in the direction of the arrow), due to the one-way ratchet, even if the positioning tooth 6 and the tooth belt 92 are in the engaged state, the positioning tooth 6 can move freely along the tooth groove. In this way, when the jaws are pulled open, the object is placed in the jaws, and then the jaws are easily reduced to a state where the object is just clamped.

[0047] The adjustable pliers can be water pump pliers, pipe pliers or other pliers. The planes on the inner sides of the first clamping part and the second clamping part intersect at an angle, forming a gap between the first clamping part and the second clamping part. This jaw shape is more consistent with the shape of the hexagonal nut. Compared with ordinary water pump pliers (which do not better fit the hexagonal nuts of larger sizes), this product can better fit all sizes of hexagonal nuts within the gear range. The first clamping part 2 and the second clamping part 1 can be integrally formed with the first handle 5 and the second handle 9 respectively, or can be connected together by connecting means.

[0048] The positions of the first handle 5 and the connecting mechanism are relatively fixed, and the linkage mechanism includes a trigger shaft 7 connected to the positioning latch 6, and the trigger shaft 7 has a trigger portion 71. The trigger portion 71 is a pressing portion of the trigger shaft 7 extending to the outer surface of the first handle 5, which is convenient for holding the pliers body and triggering the trigger shaft 7 to move through the trigger portion 71, so that the size of the jaws can be adjusted at any time. The trigger portion 71 drives the trigger shaft 7 to move, and the trigger shaft 7 drives the positioning latch 6 to rotate, so that the toothed belt 92 on the tooth groove 91 can be disengaged, so that the first handle 5 can move relative to the second handle 9 in the opposite direction of the arrow, so that the jaws can be enlarged.

[0049] The first handle 5 has a first through hole at the position of the trigger shaft 7. The trigger shaft 7 passes through the first through hole and continues to pass through the tooth groove 91 of the second handle 9 to fix the first handle 5 and the second handle 9 relatively. Further, the first handle 5 has a side hole 51 on the side wall at the connection mechanism, which can accommodate the corresponding position of the second handle 9 to pass through it, forming a first part 52 of the first handle 5 located on the second handle 9, and a second part 53 of the first handle located under the second handle. The trigger shaft 7 passes through the first part of the first handle 5 and then passes through the tooth groove 91 of the second handle, and then passes through the second part of the first handle 5. The positioning latch 6 is located inside the tooth groove 91 of the second handle 9 and engages with the tooth belt 92.

[0050] Specifically, in this embodiment, the trigger shaft 7 is arranged in the through hole of the positioning latch 6, the first end of the trigger shaft 7 extends to the first part on one side of the first handle 5, and the second end extends to the second part on the other side of the first handle 5. The trigger shaft 7 is connected to or integrated with the trigger part 71 on the outside of the first part, and the trigger part 71 also has a fixing function, and is fixed to the trigger shaft 7 on the outside of the second part through a fixing element 10. The fixing element can be a cover body, which fixes the trigger shaft 7 to the second part on the other side of the first handle 5. It can also be a nut, which is rotated to the rotating thread on the other end of the trigger shaft 7, so as to fix the trigger shaft 7. The trigger shaft 7, the trigger part 71 and the cover body can move along the tooth groove 91 of the second handle 9 with the first handle.

[0051] The linkage mechanism further includes a needle roller 72, which is arranged on the trigger shaft 7 at the position of the positioning latch 6, one end of the needle roller 72 extends from the side of the trigger shaft 7, and the other end of the needle roller 72 extends to the inclined surface 64 of the positioning latch 6. The needle roller 72 can be fixedly connected to the trigger shaft 7 or be integrated. In this specific embodiment, one end of the needle roller 72 extends into the hole 76 on the side of the trigger shaft 7 and is fixedly connected to the trigger shaft 7, and the other end extends to the inclined surface 64 on the positioning latch 6. The inclined surface 64 is located on the upper side of the through hole of the positioning latch 6, and the side tooth 61 of the positioning latch 6 is located on one side of the lower side of the through hole of the positioning latch 6. The inclined surface 64 gradually decreases from one side of the side tooth 61 of the positioning latch 6 to the other side. In this way, when pressure is applied to the trigger portion 71, the trigger shaft 7 moves downward, and the needle roller 72 moves downward with the trigger shaft 7, forcing the positioning tooth 6 to rotate toward the higher side of the inclined surface 64 at the upper side of the through hole, so that the lower part of the inclined surface 64 on the positioning tooth 6 can accommodate the needle roller 72. At the same time, the positioning tooth 6 at the lower side of the through hole will move in the opposite direction to the axial direction of the trigger shaft 7, that is, the side teeth 61 on the positioning tooth 6 are separated from the tooth belt 92 on the tooth groove 91, so that the first handle 5 can move along the second handle in the direction opposite to the arrow.

[0052] Furthermore, the cross-sectional shape of the trigger shaft 7 is non-circular, specifically, a circle with a notch in the present embodiment. The linkage mechanism of the present invention further comprises a sheet 74 having a hollow hole 75 so that it can be sleeved on the trigger shaft 7. The hollow hole is adapted to the cross-sectional shape of the trigger shaft 7. Thus, when the trigger shaft 7 receives a downward pressure, the sheet 74 can achieve the purpose of limiting the rotation of the trigger shaft 7, thereby forcing the positioning latch 6 to rotate around the trigger shaft 7. The lateral hole of the trigger shaft 7 is located at the circular notch of the cross section, and one end of the needle roller 72 is also arranged in the hole at the notch on the side of the trigger shaft 7. Specifically, the sheet 74 is arranged at the rear of the positioning latch 6, between the positioning latch 6 and the fixing element, i.e., the cover body, and is arranged inside the tooth groove 91 together with the positioning latch 6. The outer edge of the sheet 74 is square and matches the inner edge of the tooth groove 91, and will not rotate around the trigger shaft 7, thereby limiting the rotation of the trigger shaft 7 and fixing the trigger shaft 7 in the direction of rotation.

[0053] As mentioned above, the side teeth 61 of the positioning latch 6 are located on one side of the lower part of the through hole of the positioning latch 6, and a fixing portion 62 and an elastic member 63 are provided on the other side of the lower side of the through hole of the positioning latch 6 opposite to the side teeth 61, and the elastic member 63 is connected to the fixing portion 62 and abuts against the second handle 9. Specifically, the fixing portion 62 can be a spring hole, and the elastic member 63 is specifically a spring, which is arranged in the spring hole and abuts against the second handle 9. In this way, when the trigger portion 71 is released, due to the action of the spring, the side teeth 61 of the positioning latch 6 can resume the bite state with the teeth on the toothed belt 92, so that it can be used normally.

[0054] The linkage mechanism also includes an elastic element, specifically a spring 73, which is disposed in the outer recess of the first portion of the first handle 5 and contacts the inner side of the trigger portion 71. In this way, when no pressure is applied to the trigger portion 71, the spring can lift the trigger portion 71 and drive the linkage mechanism to return to its original position and return to the initial state. In this preferred embodiment, the outer peripheral surface of the trigger portion 71 is circular, such as Figure 6 As shown, in other embodiments, the outer peripheral surface of the trigger portion 71 may also be a polygonal shape or other shape suitable for installation.

[0055] The structural function implementation process of the preferred embodiment of the present invention is as follows: Figure 8 As shown in FIG. 1 , pressure is applied to the trigger shaft 7 to drive the needle roller 72 to move in the force application direction. When the needle roller 72 touches the inclined surface 64 of the positioning latch 6, the positioning latch 6 rotates around the axis of the trigger shaft 7 under the action of the force, and the positioning latch 6 and the side teeth 61 are in a non-meshing state, thereby realizing rapid gear shifting; wherein the bottom guide piece 74 limits the rotation of the trigger shaft 7, thereby offsetting the reaction force of the inclined surface 64 on the needle roller 72; the pressure on the trigger shaft 7 is removed, and under the action of the elastic member 63 and the tower spring 73, the entire structure is reset to the initial state, as shown in FIG. Figure 7 shown.

[0056] In this embodiment, the right handle can be directly pushed to achieve Figure 9 to Figure 10 The parallel jaw distance a is greater than the parallel jaw distance b) and can be adjusted quickly in one direction. Compared with ordinary water pump pliers, which require both hands to adjust, it is more convenient and labor-saving. The button can be integrally formed with the needle roller, which can save processing costs and improve production efficiency.

[0057] like Figure 11-12 As shown, the jaws of this embodiment can also be adjusted to parallel planes, that is, the inner sides of the first clamping part and the second clamping part are both set as planes, and the inner side edges are provided with stripes. The planes of the inner sides of the first clamping part and the second clamping part are parallel. This jaw shape can also match the shape of the hexagonal nut. Compared with ordinary water pump pliers (which do not better match larger sized hexagonal nuts), this product can better match all sizes of hexagonal nuts within the gear range; the adjustable pliers of the present invention can be quickly adjusted in one direction, which is convenient and labor-saving compared to ordinary water pump pliers that require both hands to adjust; with this structure, the product tooth engagement is more stable and more convenient in operation.

[0058] like Figure 13-16As shown, the present invention provides a second specific embodiment, an adjustable pliers, including a first handle 5 and a second handle 9, the first handle 5 is provided with a first clamping portion 2 at the front end, the second handle 9 is provided with a second clamping portion 1 at the front end, the first clamping portion 2 and the second clamping portion 1 form a jaw, the first handle and the second handle are arranged to intersect and are relatively fixed by a connecting mechanism, wherein the second handle has a long strip tooth groove 91 at the position of the connecting mechanism, the inner side of the tooth groove 91 has a tooth belt 92, the connecting mechanism includes a tooth block 3 arranged in the tooth groove 91 and engaged with the tooth belt 92 distributed on the tooth groove 91, and a linkage mechanism connected to the tooth block, the linkage mechanism drives the tooth block 3 to rotate and disengage from the tooth groove 91, so that the first handle 5 can move along the tooth groove 91 relative to the second handle 9 by following the movement of the connecting mechanism to change the size of the jaw, wherein the teeth on the tooth belt are one-way ratchet teeth, that is, the teeth are all obliquely oriented in one direction, such as Fig.13 The tooth belt is tilted in the direction of the arrow in the tooth groove. In this way, when the force is applied in the opposite direction of the tooth tilt, that is, the opposite direction of the arrow, the tooth belt and the tooth block have barbs between them, and external force is required to separate the two to allow the tooth block to slide in the tooth groove. In the direction of the tooth tilt, that is, the direction of the arrow, the tooth belt will push the tooth block to overcome the elastic force and automatically detach from the teeth on the tooth belt without the intervention of external force, thereby achieving one-way rapid sliding.

[0059] Specifically, the one-way ratchet means that the teeth of the toothed belt extend from the edge of the groove to the oblique upward direction, such as Fig.13 The first handle is inclined in the direction of the arrow in the tooth groove. When the jaws need to be enlarged, that is, the first handle is pulled downward from the top of the tooth groove (i.e., moving in the opposite direction of the arrow), the engagement of the tooth block and the tooth belt needs to be removed by the trigger element. When the first handle is pulled upward from the bottom of the tooth groove (i.e., moving in the direction of the arrow), due to the one-way ratchet, the tooth block can move freely along the tooth groove even if the tooth block and the tooth belt are in the engaged state. In this way, when the jaws are pulled open, the object is placed in the jaws, and then the jaws can be easily reduced to a state where the object is just clamped.

[0060] The adjustable pliers can be water pump pliers, pipe pliers or other pliers. The two clamping parts are both hook-shaped, and the inner side edges are provided with teeth for easy clamping and biting. The clamping part can be integrally formed with the handle, or connected together by a connecting means.

[0061] The positions of the first handle 5 and the connecting mechanism are relatively fixed. The linkage mechanism includes a pivot 11 arranged in the through hole of the tooth block 3 and a trigger mechanism connected to the pivot. The pivot is driven to rotate by the trigger mechanism, and the pivot further rotates with the tooth block, so that the tooth block is separated from the toothed belt, making relative movement possible.

[0062] The first handle 5 has a first through hole at the position of the pivot. The pivot is cylindrical with a circular cross section. The pivot passes through the first through hole and continues to pass through the tooth groove of the second handle 9 to fix the first handle 5 and the second handle 9 relatively.

[0063] More specifically, the first handle has a side hole on the side wall at the connection mechanism, which can accommodate the corresponding position of the second handle to pass through, forming a first part of the first handle located on the second handle, and a second part of the first handle located under the second handle. The pivot passes through the first part of the first handle and then through the tooth groove of the second handle, and then through the second part of the first handle. The tooth block is located inside the tooth groove of the second handle and engages with the tooth groove.

[0064] One side of the tooth block has teeth that can be engaged with the toothed belt, and the other side opposite thereto has a fixed portion and an elastic member, the elastic member being connected to the fixed portion and abutting against the second handle. Specifically, the fixed portion can be a spring hole, and the elastic member, specifically a spring 8, is arranged in the spring hole and abuts against the second handle. In this way, when the trigger element is released, due to the action of the spring, the teeth of the tooth block can resume the engaged state with the teeth on the toothed belt, so that the device can be used normally.

[0065] In the second embodiment, if Figure 13-16 As shown, the outer side of the pivot 11 has a spiral second groove 12, on which a guide pin 31 is arranged, and the other end of the guide pin extends from the side into the interior of the tooth block. The trigger mechanism 4 also includes a trigger switch 41. When the trigger switch generates a downward force, the guide pin 31 rotates along the spiral second groove 12, thereby driving the tooth block 3 to rotate, so that the tooth block is disengaged from the tooth groove, so that the first handle can move along the tooth groove relative to the second handle.

[0066] The trigger mechanism also includes a toothed ring 42 with internal teeth fixedly arranged in the outer recess of the first part of the first handle and a spring 43 arranged in the toothed ring below the trigger switch and in the outer recess of the first part of the first handle. The trigger switch has external teeth that can be engaged with the internal teeth of the toothed ring. Under normal circumstances, the trigger switch and the toothed ring are in a separated state. Under the action of the spring, the trigger switch is lifted by the spring, and the external teeth of the trigger switch are separated from the internal teeth of the toothed ring. After the trigger switch is pressed down, the external teeth of the trigger switch enter the internal teeth of the toothed ring. Since the toothed ring is fixed, when the internal teeth of the toothed ring are engaged with the internal teeth of the trigger switch, the trigger switch stops rotating, and the guide pin 31 rotates along the spiral second groove 12, thereby driving the tooth block 3 to rotate. The inner diameter of the spring gradually decreases from the bottom to the direction of the trigger switch. The bottom is arranged in the toothed ring 42 with internal teeth in the outer recess of the first part of the first handle, and the top is in contact with the bottom of the trigger element.

[0067] The pivot has a smaller head on the trigger element outside the first part of the first handle at the upper part of the second handle, so that it can be fixed inside the trigger element outside the first handle. The other end, that is, the outside of the second part of the first handle, is fixed by a fixing element 10. The other end of the pivot can be a thread, and the fixing element 10 is a nut. The pivot is fixed by rotating the thread to the nut.

[0068] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. An adjustable pliers, comprising a first handle and a second handle, wherein the front end of the first handle is provided with a first clamping portion, the front end of the second handle is provided with a second clamping portion, the first clamping portion and the second clamping portion form a jaw, the first handle and the second handle are arranged to intersect and are relatively fixed by a connecting mechanism, characterized in that: The second handle has a long strip tooth groove at the position of the connecting mechanism, and the inner side of the tooth groove has a tooth belt. The connecting mechanism includes a positioning latch tooth arranged in the tooth groove and a linkage mechanism connected to the positioning latch tooth, the positioning latch tooth has side teeth that mesh with the tooth belt on the tooth groove, and the linkage mechanism is configured to drive the positioning latch tooth to rotate so that the side teeth on the positioning latch tooth are disengaged from the meshing with the tooth belt, so that the first handle moves along the tooth groove relative to the second handle through the movement of the connecting mechanism, and the linkage mechanism includes a trigger shaft connected to the positioning latch tooth, and the trigger shaft has a trigger part; wherein, the tooth belt is provided with a one-way ratchet; the trigger shaft is arranged in the through hole of the positioning latch tooth, and the trigger part is an extension of the trigger shaft A pressing portion extending to the outside of the surface of the first handle; the linkage mechanism also includes a needle roller, which is arranged on the trigger shaft at the position of the positioning tooth, one end of the needle roller extends from the side of the trigger shaft, and the other end of the needle roller extends to the inclined surface of the positioning tooth; the inclined surface is located on the upper side of the positioning tooth through hole, and the thickness of the inclined surface gradually decreases from one side of the side teeth of the positioning tooth to the other side; when pressure is applied to the trigger part, the trigger shaft moves downward, and the needle roller moves downward with the trigger shaft, forcing the positioning tooth to rotate toward the side with a higher inclined surface on the upper side of the through hole, so that the lower part of the inclined surface on the positioning tooth accommodates the needle roller, and at the same time, the positioning tooth on the lower side of the through hole will move in the opposite direction to the axial direction of the trigger shaft.

2. The adjustable pliers according to claim 1, characterized in that: The side teeth of the positioning latch are located on one side of the lower side of the positioning latch through hole.

3. The adjustable pliers according to claim 1, characterized in that: The needle roller is fixedly connected to or integrated with the trigger shaft.

4. The adjustable pliers according to claim 1, characterized in that: One end of the rolling needle extends into the lateral hole of the trigger shaft and is fixedly connected to the trigger shaft.

5. The adjustable pliers according to claim 1, characterized in that: The cross-sectional shape of the trigger shaft is a circle with a notch.

6. The adjustable pliers according to claim 5, characterized in that: The linkage mechanism also includes a sheet body having a hollow hole so as to be sleeved on the trigger shaft, and the hollow hole is adapted to the cross-sectional shape of the trigger shaft.

7. The adjustable pliers according to claim 6, characterized in that: The first handle has a side hole on the side wall at the connecting mechanism, through which the corresponding position of the second handle is accommodated, forming a first part of the first handle located above the second handle, and a second part of the first handle located below the second handle, wherein the trigger shaft passes through the first part of the first handle and then through the tooth groove of the second handle, and then through the second part of the first handle.

8. The adjustable pliers according to claim 7, characterized in that: The first end of the trigger shaft extends to a first part on one side of the first handle, and the second end extends to a second part on the other side of the first handle, wherein the trigger part is located outside the first part and is fixed to the trigger shaft through a fixing element outside the second part.

9. The adjustable pliers according to claim 1, characterized in that: The positioning latch has a fixing portion and an elastic member on the other side of the lower side of the through hole opposite to the side teeth. The elastic member is connected to the fixing portion and abuts against the second handle.

10. The adjustable pliers according to claim 9, characterized in that: The fixing portion is a spring hole, the elastic member is a spring, and the spring is arranged in the spring hole.

11. The adjustable pliers according to claim 1, characterized in that: The planes on the inner sides of the first clamping part and the second clamping part intersect at an angle, forming a gap between the first clamping part and the second clamping part, and the inner sides of the first clamping part and the second clamping part are provided with stripes to facilitate clamping and biting.

12. The adjustable pliers according to claim 1, characterized in that: The first clamping portion or the second clamping portion is integrally formed with the first handle or the second handle, and is also connected together by a connecting means.

13. The adjustable pliers according to claim 8, characterized in that: The sheet body is arranged between the positioning latch teeth and the fixing element.

14. The adjustable pliers according to claim 8, characterized in that: The sheet body is located inside the tooth groove, and the outer edge of the sheet body is square and matches the inner edge of the tooth groove.

15. The adjustable pliers according to claim 8, characterized in that: The linkage mechanism further includes a compression spring, which is arranged in a recess outside the first part of the first handle and contacts the trigger portion.

16. The adjustable pliers according to claim 1, characterized in that: The first clamping portion and the second clamping portion are both planes, and inner sides thereof are provided with stripes, and the inner planes of the first clamping portion and the second clamping portion are parallel.

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