A labor-saving pliers

Abstract

The utility model relates to a labor-saving pliers, comprising a first pliers body and a second pliers body connected by a hinge shaft, a ratchet piece is arranged on the first pliers body, a back-stop pawl piece is arranged on the second pliers body, the ratchet piece and the back-stop pawl piece are meshed with each other, the first pliers body and the second pliers body are close to each other to drive the ratchet piece and the back-stop pawl piece to move relative to each other and mesh, so as to position the first pliers body and the second pliers body. The utility model realizes the positioning of the two pliers bodies through the cooperation of the ratchet piece and the back-stop pawl piece, so that the pliers can be positioned after clamping when in use, so that there is no need to continuously exert force to hold, and the purpose of labor saving is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pliers, in particular to a pair of labor-saving pliers. Background Art

[0002] Pliers are commonly used hardware tools, generally including two pliers handles. The shearing function is achieved by holding the two pliers handles and moving the two pliers handles closer to and farther from each other. Since the hand needs to exert force when shearing, long-term operation can easily cause fatigue of the hand. In order to solve such problems, some labor-saving pliers have emerged. The principles of labor-saving pliers are mainly as follows: first, the lever principle is used to convert the force applied to the handle into the force of clamping or interrupting objects, thereby reducing the force of the hand; second, the force arm principle is used to change the design or structure of the pliers, such as increasing the length of the pliers handle, so that the force arm becomes longer, thereby reducing the force required to be applied and achieving the purpose of labor saving; third, the blade edge principle is used to change the blade edge shape of the pliers, such as using an oblique blade or overlapping blade edge design, which can reduce the size of the force applied to the handle and further improve the labor-saving effect; fourth, an eccentric design is used to shorten the distance between the center wheel and the pliers blade, so that the axis is closer to the front end, reducing the length of the resistance arm, thereby increasing the clamping force under the same force, achieving a labor-saving effect; fifth, the lever structure is used. Through the lever structure formed by the grip and the handle and the lever effect of the pliers head itself, the force can be amplified when the grip is closed to achieve labor saving.

[0003] However, no matter which of the above-mentioned labor-saving methods is used, for operating the pliers, the hand needs to continuously exert force when clamping in order to perform operations such as shearing and clamping, which is inconvenient to use. Utility Model Content

[0004] The utility model aims to provide a labor-saving pliers to solve the above problems existing in the current labor-saving pliers.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A force-saving pliers comprises a first pliers body and a second pliers body connected by a hinge shaft, the first pliers body is provided with a ratchet piece, the second pliers body is provided with a stop pawl piece, the ratchet piece and the stop pawl piece are meshed with each other, the first pliers body and the second pliers body are close to each other to drive the ratchet piece and the stop pawl piece to move relative to each other and mesh, so as to position the first pliers body and the second pliers body.

[0007] Furthermore, a plurality of ratchets are arranged on the ratchet piece, a plurality of stop pawls are arranged on the stop pawl piece, the stop pawls are used to engage with the ratchet teeth, an elastic piece is provided on the second pliers body, the stop pawl piece is approached to the ratchet piece through the elastic piece so that the stop pawls engage with the ratchet teeth.

[0008] Furthermore, an unlocking member is provided on the anti-retraction pawl member, and the unlocking member is used to drive the anti-retraction pawl member to disengage from the engagement with the ratchet member.

[0009] Furthermore, a limit lock block is provided on the second pliers body, and a corresponding limit portion is provided on the stop pawl member, and the limit lock block is used to be engaged in the limit portion to disengage the stop pawl member from engagement with the ratchet member.

[0010] Furthermore, the elastic member includes a torsion spring, and the end of the anti-retraction pawl member is arranged on the second caliper body through the torsion spring.

[0011] Furthermore, the ratchet member and the first pliers body are integrally formed.

[0012] Furthermore, the ratchet member is riveted to the first caliper body.

[0013] Beneficial effects of the utility model:

[0014] The labor-saving pliers of the utility model are provided with a ratchet piece on the first pliers body and a back-stop pawl piece on the second pliers body, and the ratchet piece and the back-stop pawl piece are meshed with each other. In actual use, the first pliers body and the second pliers body are held so that the first pliers body and the second pliers body are close to each other. When the first pliers body and the second pliers body are close to each other, the ratchet piece and the back-stop pawl piece will also produce relative movement, and the ratchet piece and the back-stop pawl piece will also mesh. At this time, even if the first pliers body and the second pliers body are released, the first pliers body and the second pliers body will continue to maintain their positioning, so that the clamped materials will not be loosened. The user can loosen his hands and relieve the fatigue of the hands during clamping, thereby achieving the purpose of labor-saving. Compared with ordinary pliers, it has a significant labor-saving effect.

[0015] Furthermore, by providing an unlocking member, the unlocking member can be moved to drive the stop pawl member away from the ratchet member, so that the stop pawl member is disengaged from the ratchet member to release the positioning of the first caliper body and the second caliper body.

[0016] Furthermore, by providing a limiting locking block on the second pliers body and a corresponding limiting portion on the stop pawl member, the limiting locking block can be engaged in the limiting portion, or be disengaged from the engagement with the limiting portion. When the limiting locking block is not engaged with the limiting portion, the stop pawl member remains close to the ratchet member, and the pliers have a labor-saving effect. When the limiting locking block is engaged with the limiting portion, the stop pawl member does not contact the ratchet member, and the pliers can be used as ordinary pliers without the labor-saving effect, thereby adapting to different usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram (stereoscopic diagram) of a labor-saving pliers in one embodiment of the utility model;

[0018] Figure 2 It is a structural schematic diagram (exploded diagram) of a labor-saving pliers in one embodiment of the utility model;

[0019] Figure 3 It is a structural schematic diagram (stereoscopic diagram) of a labor-saving pliers in another embodiment of the utility model;

[0020] Figure 4 It is a structural schematic diagram (exploded diagram) of a labor-saving pliers in another embodiment of the utility model;

[0021] Figure 5 It is a structural schematic diagram (stereoscopic diagram) of a labor-saving pliers in another embodiment of the utility model;

[0022] Figure 6 It is a structural schematic diagram (exploded diagram) of a labor-saving pliers in another embodiment of the utility model;

[0023] Figure 7 The utility model is a schematic structural diagram of the meshing of a ratchet piece and a back-stop pawl piece in the labor-saving pliers.

[0024] The names corresponding to the marks in the figure are:

[0025] 1. a first clamp body, 2. a second clamp body, 3. a ratchet member, 31. a ratchet, 4. a stop pawl member, 41. a stop pawl, 5. an elastic member, 6. an unlocking member, 7. a limit locking block, 8. a limit portion. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] The labor-saving pliers in the embodiment of the utility model are achieved by arranging a ratchet piece and a stop pawl piece on the two pliers bodies. The positioning of the two pliers bodies is achieved through the cooperation of the ratchet piece and the stop pawl piece, so that the pliers can be positioned after clamping when in use, thereby eliminating the need for continuous force to hold, thereby achieving the purpose of labor saving.

[0028] like Figure 1 and Figure 2 As shown, the structure of the force-saving pliers in one embodiment includes a first pliers body 1 and a second pliers body 2. The first pliers body 1 and the second pliers body 2 are hinged by a hinge shaft. By holding the first pliers body 1 and the second pliers body 2, the handles of the first pliers body 1 and the second pliers body 2 are brought close to each other, thereby achieving the purpose of clamping an object. A ratchet piece 3 is arranged on the first pliers body 1, and a stop pawl piece 4 is arranged on the second pliers body 2. The ratchet piece 3 and the stop pawl piece 4 are arranged to mesh with each other. In actual use, the first pliers body 1 and the second pliers body 2 are held so that the first pliers body 1 and the second pliers body 2 are close to each other. When the first pliers body 1 and the second pliers body 2 are close to each other, the ratchet piece 3 and the stop pawl piece 4 will also move relative to each other, and the ratchet piece 3 and the stop pawl piece 4 will also mesh with each other. At this time, even if the first pliers body 1 and the second pliers body 2 are released, the first pliers body 1 and the second pliers body 2 will continue to maintain their positioning, so that the clamped material will not be loosened, and the user can loosen his hands to relieve hand fatigue during clamping, thereby achieving the purpose of saving effort. Compared with ordinary pliers, it has a significant labor-saving effect.

[0029] like Figure 7 As shown, the structure of the ratchet member 3 and the anti-retraction pawl member 4 is shown. A plurality of ratchets 31 are arranged on the ratchet member 3, and a plurality of anti-retraction pawls 41 are arranged on the anti-retraction pawl member 4. The anti-retraction pawl 41 can engage with the ratchet teeth 31. An elastic member 5 is provided on the second pliers body 2. The anti-retraction pawl member 4 can maintain a close state with the ratchet member 3 through the elastic member 5, so that when the first pliers body 1 and the second pliers body 2 are close to each other, the anti-retraction pawl member 4 can retreat relative to the ratchet member 3, so that the mutual approach of the first pliers body 1 and the second pliers body 2 is not interfered. At the same time, the anti-retraction pawl can also engage with the ratchet teeth to maintain the positioning state of the first pliers body 1 and the second pliers body 2.

[0030] like Figure 3 - Figure 6 As shown, an unlocking member 6 is also provided on the anti-retraction pawl member 4. By pulling the unlocking member 6, the anti-retraction pawl member 4 can be moved away from the ratchet member 3, so that the anti-retraction pawl member 4 is disengaged from the ratchet member 3 to release the positioning of the first pliers body 1 and the second pliers body 2.

[0031] In some embodiments, Figure 1 - Figure 6As shown, a limit lock block 7 is provided on the second pliers body 2, and a corresponding limit portion 8 is provided on the stop pawl member 4. The limit lock block 7 is rotatably arranged on the second pliers body 2 by a pin, and can be rotated so that the limit lock block 7 is engaged in the limit portion 8, or is disengaged from the engagement with the limit portion 8. When the limit lock block 7 is not engaged with the limit portion 8, the stop pawl member 4 remains close to the ratchet member 3, and the pliers have a labor-saving effect. When the limit lock block 7 is engaged with the limit portion 8, the stop pawl member 4 does not contact the ratchet member 3, and the pliers are used as ordinary pliers without a labor-saving effect, thereby adapting to different usage requirements.

[0032] In some embodiments, Figure 2 , Figure 4 and Figure 6 As shown, the elastic member 5 is a torsion spring, and the end of the back-stop pawl member 4 is arranged on the second caliper body 2 through the torsion spring, so that the back-stop pawl member 4 remains close to the ratchet member 3.

[0033] In other embodiments, the elastic member 5 is a spring, which also serves to keep the retaining pawl member 4 close to the ratchet member 3 .

[0034] like Figure 1 - Figure 4 As shown, in some embodiments, the ratchet member 3 is integrally formed with the first pliers body 1 , and the ratchet is directly processed on the first pliers body 1 .

[0035] like Figure 5 and Figure 6 As shown, in other embodiments, the ratchet member 3 is riveted to the first caliper body 1 .

[0036] Working principle:

[0037] When shearing or clamping an object or workpiece, the operator holds the pliers and applies force with his hands to bring the first pliers body 1 and the second pliers body 2 closer to each other, thereby clamping the object. During the clamping process, the ratchet member 3 and the stop pawl member 4 move relative to each other and continue to remain in an engaged state, so that the force applied by the hand can be relaxed and the clamping state of the workpiece can still be maintained. The hand can be relaxed without continuous force, which can significantly improve the fatigue of the hand caused by continuous force when using the pliers, thereby achieving a labor-saving effect.

[0038] Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the protection scope of the utility model.

Claims

1. A labor-saving pliers, characterized in that: The invention comprises a first pliers body (1) and a second pliers body (2) connected by a hinge shaft, wherein the first pliers body (1) is provided with a ratchet piece (3), and the second pliers body (2) is provided with a stop-retraction pawl piece (4), wherein the ratchet piece (3) and the stop-retraction pawl piece (4) are arranged to mesh with each other, and the first pliers body (1) and the second pliers body (2) are brought close to each other to drive the ratchet piece (3) and the stop-retraction pawl piece (4) to move relative to each other and mesh with each other, so as to position the first pliers body (1) and the second pliers body (2).

2. The labor-saving pliers according to claim 1, characterized in that: The ratchet piece (3) is provided with a plurality of ratchet teeth (31) arranged in an array, the stop-retreat pawl piece (4) is provided with a plurality of stop-retreat pawls (41) arranged in an array, the stop-retreat pawls (41) being used to mesh with the ratchet teeth (31), and the second pliers body (2) is provided with an elastic piece (5), the stop-retreat pawl piece (4) is close to the ratchet piece (3) through the elastic piece (5) so that the stop-retreat pawls (41) mesh with the ratchet teeth (31).

3. The labor-saving pliers according to claim 2, characterized in that: The stop-retraction pawl member (4) is provided with an unlocking member (6), and the unlocking member (6) is used to drive the stop-retraction pawl member (4) to disengage from the meshing with the ratchet member (3).

4. The labor-saving pliers according to claim 3, characterized in that: A limit lock block (7) is provided on the second pliers body (2), and a corresponding limit portion (8) is provided on the stop-retraction pawl member (4). The limit lock block (7) is used to be engaged in the limit portion (8) to disengage the stop-retraction pawl member (4) from meshing with the ratchet member (3).

5. The labor-saving pliers according to claim 2, characterized in that: The elastic member (5) comprises a torsion spring, and the end of the back-stop pawl member (4) is arranged on the second caliper body (2) via the torsion spring.

6. The labor-saving pliers according to claim 4, characterized in that: The ratchet member (3) is integrally formed with the first pliers body (1).

7. The labor-saving pliers according to claim 4, characterized in that: The ratchet member (3) is riveted to the first caliper body (1).

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