TWI730670B - Labor-saving pliers - Google Patents

Abstract

A labor-saving pliers comprising a first jaw jaw unit with a limiting surface, a second jaw jaw unit pivotally connected to the first jaw unit and changing between a locked state and an active state, and a linkage member , And a rolling unit. The link includes a pivotal portion pivotally connected to the second jaw clamping unit, and an abutting surface opposite to the pivotal portion and provided on the first jaw clamping unit. The rolling unit includes a rolling element. The rolling element is rotatably disposed between the abutting surface of the linkage and the limiting surface of the first jaw unit, and has a parabolic rolling element that is at least in contact with the abutment surface surface. Thereby, through the rolling element, the abutment surface of the linkage element can slide on the rolling surface of the rolling element, and the locking state of the second jaw unit is released in a labor-saving manner, due to the rolling element Hidden in the second jaw unit and abutting between the abutting surface and the limiting surface, not only the structure is simple, the operation is easy, but also the mute effect can be achieved.

Description

Labor-saving pliers

The invention relates to a hand tool, in particular to a labor-saving pliers.

1, a conventional pliers 1 is illustrated, which mainly includes a first jaw 11, a grip 12 connected to the first jaw 11, a bolt 13 screwed to the grip 12, and a pivot A second jaw 14 on the first jaw 11, a force handle 15 pivotally connected to the second jaw 14, pivotally connected to the force handle 15 and penetrates the grip 12 and abuts A connecting rod 16 on the bolt 13 and a follower 17 pivotally connected to the forcing handle 15 and capable of swinging toward the connecting rod 16.

Thereby, a four-link mechanism is formed between the connecting rod 16, the grip 12, the second jaw 14 and the force application handle 15, and the second jaw 14 and the first jaw 14 can be driven by the force application handle 15. When a clamping jaw 11 reduces the distance to clamp an object, and moves the connecting rod 16 to the dead center of the four-linked rod mechanism, the force application handle 15 and the second jaw 14 are positioned and stabilized in a lock status.

When the aforementioned locked state is to be released, the user only needs to push the follower 17 to push the connecting rod 16 out of the dead center, and the aforementioned locked state can be released.

However, during the operation when the pliers 1 is not in the locked state, the follower 17 will swing freely between the forcing handle 15 and hit the forcing handle. Not only will it make noise, but it will also be in contact with the forcing handle 15. The space formed is easy to pinch the fingers.

Therefore, the object of the present invention is to provide a labor-saving pliers that is simple in structure, easy to use and operate, and can achieve the effect of silence.

Therefore, the labor-saving pliers of the present invention includes a first jaw jaw unit, a second jaw jaw unit, a linkage, and a rolling unit.

The first jaw clamping unit has a limit surface.

The second jaw jaw unit is pivotally connected to the first jaw jaw unit and changes between a locked state and an active state. In the locked state, the second jaw jaw unit is positioned adjacent to the first jaw jaw unit Position, in the active state, the second jaw clamping unit can move movably relative to the first jaw clamping unit.

The link includes a pivotal portion pivotally connected to the second jaw clamping unit, and an abutting surface opposite to the pivotal portion and provided on the first jaw clamping unit.

The rolling unit includes a rolling element. The rolling element is rotatably disposed between the abutting surface of the linkage and the limiting surface of the first jaw unit, and has a parabolic rolling element that is at least in contact with the abutment surface surface.

The effect of the present invention is: through the rolling element that can be rolled, the interlocking The abutting surface of the rolling element can slide on the rolling surface of the rolling element, thereby releasing the locked state of the second jaw jaw unit in a less labor-saving manner, because the rolling element is hidden in the second jaw jaw unit and abuts against Between the abutting surface and the limiting surface, not only the structure is simple, the operation is easy, but also the mute effect can be achieved.

2: The first jaw unit

21: The first jaw

22: The first grip

220: First Space

23: adjusting bolt

231: Limit Surface

3: The second jaw unit

31: Second jaw

32: second grip

320: second space

4: Linkage

41: Pivot

42: abutment surface

421: Curved part

5: Reset the elastic element

6: Rolling unit

61: Rolling pieces

611: rolling surface

62: Adjust the elastic element

X: length direction

A: The first contact

B: second contact

C: third contact

D: Fourth contact

L: straight line

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: FIG. 1 is a top view illustrating a conventional clamp; FIG. 2 is a three-dimensional exploded view illustrating the labor saving of the present invention Fig. 3 is a perspective view of the first embodiment; Fig. 4 is a cross-sectional view illustrating that a second jaw unit in the first embodiment is in an active state; Fig. 5 is a similar Fig. 4 is a cross-sectional view, but the second jaw unit is in a locked state; Fig. 6 is a cross-sectional view illustrating a first variation of a rolling element in the first embodiment; Fig. 7 is a cross-sectional view illustrating the first The second variation of the rolling element in the embodiment; and FIG. 8 is a cross-sectional view illustrating a second embodiment of the labor-saving pliers of the present invention.

2 and 3, an embodiment of the labor-saving pliers of the present invention includes a first jaw jaw unit 2, a second jaw jaw unit 3, a linkage 4, a reset elastic element 5, and a rolling unit 6 .

The first jaw unit 2 includes a first jaw 21, a first handle 22 fixed to the first jaw 21, and an adjusting bolt 23. The first handle 22 defines a first space 220 extending along a length direction X and opening toward the second jaw unit 3. The adjusting bolt 23 is screwed to the end portion of the first handle 22 along the length direction X, and has a limiting surface 231 formed at one end and passing through the first space 220.

The second jaw unit 3 includes a second jaw 31 pivotally connected to the first jaw 21 with a first contact A, and a second jaw 31 pivotally connected to the second jaw 31 with a second contact B A second grip 32. The second handle 32 defines a second space 320 extending along the length direction X and opening toward the first jaw unit 2 (as shown in FIG. 4 ).

The second jaw unit 3 changes between a locked state (as shown in FIG. 5) and an active state (as shown in FIG. 4). Referring to FIG. 5, in the locked state, the second jaw unit 3 is positioned adjacent to the first jaw. The position of a jaw jaw unit 2 and the second jaw jaw unit 3 cannot move without external force. 4, in the active state, the second jaw clamping unit 3 can movably displace relative to the first jaw clamping unit 2, that is, the second grip 32 can move relative to the first grip 22 and drive the The second jaw 31 is reduced relative to the first jaw 21 Spacing or enlarged spacing.

2 and 3, the linkage member 4 includes a pivot portion 41 that penetrates the second space 320 and is pivotally connected to the second handle 32 by a third contact point C, and is opposite to the pivot The connecting portion 41 movably penetrates through an abutting surface 42 of the first space 220 along the length direction X. In this embodiment, the abutting surface 42 has a curved portion 421 recessed along a parabola.

The reset elastic element 5 is connected to the first grip 22 and the second jaw 31, and constantly causes the second jaw 31 to be away from the first jaw 21 and drives the second grip 32 away from the first jaw. A bias of the handle 21.

The rolling unit 6 includes a rolling element 61. In this embodiment, the rolling element 61 is a circular disc, and is rotatably disposed between the abutting surface 42 of the linkage member 4 and the limiting surface 231 of the adjusting bolt 23, and has contact with the abutting surface 42 A rolling surface 611 which is parallel to the limit surface 231 and is parabolic. The rolling surface 611 is the circumferential surface of the disc, and is matched with the curved portion 421 of the abutting surface 42 of the link 4 to form a fourth contact D.

4, through the first contact A to the fourth contact D, the linkage 4, the first grip 22, the second jaw 31 and the second grip 32 can form a four-connection The lever mechanism, whereby the abutment surface 42 of the linkage 4, the rolling member 61, and the limiting surface 231 of the adjusting bolt 23 abut against each other, so when the adjusting bolt 23 is turned, the adjusting bolt 23 is changed. When it is screwed with the first handle 22, the adjusting bolt 23 pushes or releases the rolling member 61 with the limiting surface 231, and the rolling member 61 drives the abutting surface 42 of the linkage member 4 along The length direction X is displaced in the second space 320, and then Linking the second jaw 31 and the second grip 32 to enlarge or reduce the distance between the first jaw 21 and the first grip 22 respectively, so that the first jaw 21 and the second jaw 31 are suitable for Clamp objects with different outer diameters.

When the second grip 32 is operated, the second jaw 31 is driven to reduce the distance relative to the first jaw 21 to clamp an object, and the linkage member 4 is moved to the second contact point B and the third contact point. When the contact point C and the fourth contact point D form a straight line L and are located at the dead center of the four-linkage mechanism, the second grip 32 and the second jaw 31 will be positioned and stabilized in the locked state.

When the aforementioned locked state is to be released, the user only needs to pull the second handle 32, or the first handle 22 and the second handle 32 outward, and the linkage member 4 can be activated during the force application process. The curved portion 421 of the abutting surface 42 slides along the rolling surface 611 of the rolling member 61, or drives the rolling member 61 to roll, and slides on the rolling surface 611, thereby making the linkage member 4 in a less labor-saving manner Displacement to the position where the second contact point B, the third contact point C, and the fourth contact point D cannot form a straight line L and deviate from the dead point, the locked state can be released.

It should be noted that the abutting surface 42 of the linking member 4 is not limited to the curved surface portion 421. In other variations of this embodiment, it can also be an inclined surface or a flat surface, but it can also follow the rolling surface of the rolling member 61. 611 slides, or drives the rolling element 61 to roll, but it is not limited to this.

In addition, the rolling element 61 is not limited to being a disc, and in other variations of this embodiment In the modified example, it can also be a roller as shown in FIG. 6, and the circumferential surface is also used as the rolling surface 611, or as shown in FIG. 7 as a sphere, and the spherical surface is used as the rolling surface 611. limit.

Refer to FIG. 8, which is a second embodiment of the present invention, which also includes the first jaw unit 2, the second jaw unit 3, the linkage 4, and the rolling unit 6. The difference lies in: the rolling unit 6 It also includes an adjusting elastic element 62. The adjusting elastic element 62 is movably disposed in the first space 220 along the length direction X and is located between the rolling surface 611 of the rolling element 61 and the abutting surface 42 of the adjusting bolt 23.

When the locked state of the second jaw unit 3 is to be released, the curved portion 421 of the abutting surface 42 of the linkage member 4 can also slide along the rolling surface 611 of the rolling member 61 during the force application process, or drive The rolling member 61 rolls and slides on the rolling surface 611, and the rolling member 61 is pressed by the abutting surface 42 of the linking member 4 to compress the adjusting elastic element 62, thereby making the linking motion more labor-saving. The piece 4 is released from the dead center position, and the aforementioned locked state is released.

Since those with ordinary knowledge in this field can deduce the details of the expansion based on the above description, no further description is given.

Based on the above description, the advantages of the foregoing embodiments can be summarized as follows: The present invention uses the rolling element 61 that can roll, so that the abutting surface 42 of the linkage member 4 can slide on the rolling surface 611 of the rolling element 61 to compare A labor-saving way, To release the locked state of the second jaw unit 3, since the rolling member 61 is hidden in the first jaw unit 2 and abuts between the abutting surface 42 and the limiting surface 231, in addition to lifting the whole In addition to aesthetics, it is important that the rolling unit 6 does not shake, which is not only simple in structure, easy to use and operate, but also capable of achieving a mute effect.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to This invention patent covers the scope.

2: The first jaw unit

21: The first jaw

22: The first grip

220: First Space

23: adjusting bolt

231: Limit Surface

3: The second jaw unit

31: Second jaw

32: second grip

320: second space

4: Linkage

41: Pivot

42: abutment surface

421: Curved part

5: Reset the elastic element

6: Rolling unit

61: Rolling pieces

611: rolling surface

X: length direction

A: The first contact

B: second contact

C: third contact

D: Fourth contact

L: straight line

Claims (9)

A labor-saving pliers, comprising: a first jaw jaw unit defining a first space and a limiting surface formed in the first space; a second jaw jaw unit pivotally connected to the first jaw jaw Unit, and change between a locked state and an active state. In the locked state, the second jaw jaw unit is positioned adjacent to the first jaw jaw unit, and in the active state, the second jaw jaw unit Movably displaces relative to the first jaw clamping unit; a linkage member includes a pivotal portion pivotally connected to the second jaw jaw unit, and an abutment opposite to the pivotal portion and arranged in the first space A supporting surface; and a rolling unit, including a rolling element, the rolling element is rollably arranged between the abutting surface of the linkage and the limiting surface of the first jaw unit, and has at least contact with the abutting surface and A rolling surface that is parabolic. The labor-saving pliers according to claim 1, wherein the rolling element is a sphere, and the rolling surface is a sphere. The labor-saving pliers according to claim 1, wherein the rolling element can be one of a roller and a disc, and the rolling surface is a circumferential surface. The labor-saving pliers according to claims 1 to 3, wherein the abutting surface has a curved surface that matches with the rolling surface. The labor-saving pliers according to claim 1, wherein the abutting surface of the linkage member is movably arranged in the first space along a length direction of the first jaw unit, and the rolling unit further includes an adjusting elastic element , And the adjustment bullet The sex element is movably arranged on the first jaw unit along the length direction and is located between the rolling element and the abutting surface. The labor-saving pliers according to claim 5, wherein the first jaw unit includes a first jaw, and a first grip connected to the first jaw, and the first grip defines an edge along the The length direction extends and the opening faces the first space of the second jaw clamping unit, and the abutting surface of the rolling unit and the linkage is arranged in the first space. The labor-saving pliers according to claim 6, wherein the first jaw unit further includes an adjusting bolt, which is screwed to the first grip along the length direction, and has one end formed at one end and passing through The limit surface of the first space. The labor-saving pliers according to claim 6, wherein the second jaw unit includes a second jaw pivotally connected to the first jaw, and a pivot pivotally connected to the second jaw and the linkage member A second handle of the connecting part. The labor-saving pliers according to claim 8, further comprising a reset elastic element, the reset elastic element is connected to the first grip and the second jaw, and constantly generates the second jaw away from the first jaw A bias of the jaw.

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