TWI389780B - Iron shear - Google Patents

Description

Iron shear

The present invention relates to a tin shear.

The iron shears are used to cut hard-surfaced workpieces, such as iron or stainless copper. The conventional tin shears are shown in Figure 1. They contain two mutually-cutting cutting edges 61 and are formed at the ends of the two cutting edges 61. There is a sharp edge portion 611, and the other end is formed with a connecting portion 612 and each of the pivots is provided with a handle 62. The two grips 62 are also pivoted to one end of the cutting edge so as to allow the user to press the two grips 62. By pivoting the lever principle to drive the two cutting edges 61, and the concentrated stress generated by the overlapping of the two cutting edges 61, that is, the iron sheet can be cut, the spring will drive the two cutting edges 61 in the unfolded state, so the user only needs to repeat Pressing the grip 62 causes the cutting edge 61 to be closed, that is, the cutting operation can be continued.

However, when the two cutting edges 61 are unfolded at an angle, the connecting ends 612 of the cutting edges 61 abut against the shank 621 of each of the grips 62, and the angle at which the cutting edges 61 are unfolded is restricted, that is, the elastic members can no longer be used. The cutting edge is driven to be unfolded. Therefore, as long as the elastic member is opened, the connecting portion 612 of the cutting edge 61 may hit the handle body 621 of the handle 62 due to the elastic force. Since the hardness of the cutting edge 61 and the grip 62 are different, one of them The contact surface of the person will wear out, so the maximum angle at which the cutting edge can be unfolded gradually causes the cutting edge to open too much, changing the original set tight relationship between the two cutting edges, in addition to reducing the strength of the cutting, it will also reduce The precision of the cut makes it impossible to cut at all.

Therefore, when the contact surface of the grip and the cutting edge is worn to a certain extent, it is necessary to replace the new product in order to maintain the cutting effect and the durability is not good.

The main object of the present invention is to provide a sheet shear with excellent durability to maintain a stable cutting effect.

In order to achieve the above object, the present invention provides a metal shear comprising a shearing device, an elastic member and a grip.

The cutting tool comprises a first blade member and a second blade member, wherein the first blade member and the second blade member are in the shape of a bend and comprise a blade portion, a pivoting portion and a connecting portion, wherein each of the pivoting portions is located Between the blade portion and the connecting portion, and each of the pivoting portions is connected to each other, so that the first blade member and the second blade member can be unfolded or folded together, and during the folding process, each blade portion is The slanting portion of the first blade member is provided with a pushing surface, and the edge of the blade portion of the second blade member is provided with an abutting surface, wherein the pushing surface is in contact with the abutting surface The first blade member and the second blade member cannot be unfolded, and each of the blade portions still overlaps with each other.

The elastic member causes the first blade member and the second blade member to have a tendency to expand to a maximum angle at any time.

The handle includes a first handle and a second handle. The first handle and the second handle are pivotally connected to each other to be unfolded or folded. The first handle and the first blade The second handle is connected to the second blade so that the handle is in a linked relationship with the cutter. When one of them is unfolded or folded, the other is unfolded or folded.

Thereby, after the first blade member and the second blade member of the present invention are deployed to a predetermined angle, the abutting surface and the abutting surface are in contact with each other, and the force exerted by the elastic member is received, because the shearing device is the same material. The first blade member and the second blade member are made to have the same hardness without causing the contact surface of one of the pieces to be worn, so that the contact between the pushing surface and the abutting surface does not cause contact after repeated contact with the abutting surface. The wear and durability of the face is excellent.

In the following, the structural features of the present invention and the intended effects thereof will be described in the preferred embodiments, and are not intended to limit the scope of the invention as claimed.

Referring to FIG. 2 to FIG. 5 , the metal scissors of the present invention comprises a cutting tool 1 , an elastic member 2 , a handle 3 and a buckle 4 .

Referring to FIG. 4 and FIG. 5 , the cutting tool 1 includes a first blade member 11 and a second blade member 12 . The first blade member 11 and the second blade member 12 are both bent and overlap each other. The first blade member 11 and the second blade member 12 respectively include a blade portion, a pivoting portion and a connecting portion, and each of the pivoting portions is located between the blade portion and the connecting portion, more specifically, The pivoting portion 113 of the blade member 11 is located between the blade portion 112 and the connecting portion 114, and the pivoting portion 124 of the second blade member 12 is located between the blade portion 123 and the connecting portion 125, and each of the pivoting portions 113 And 124 are connected to each other, so that the first blade member 11 and the second blade member 12 can be unfolded or folded together, and when the first blade member 11 and the second blade member 12 are engaged with each other, each of the blade portions 112 and 123 will be The first blade member 11 is provided with a pushing surface 111. The edge of the blade portion 123 of the second blade member 12 is provided with an abutting surface 122, so that the pivoting portion 124 of the second blade member 12 is disposed. Located at the abutting surface 122 and the second blade Between the connecting portions 125 of the 12, when the pushing surface 111 is in contact with the abutting surface 122, the first blade member 11 and the second blade member 12 cannot be unfolded, as shown in FIGS. 2 and 5. As shown, each of the blade portions 112, 123 still overlaps with each other, and does not separate from each other, so that the cut articles directly fall into the pivot portions 113, 124, that is, when the first blade member 11 and the second blade member 12 are deployed. When the abutting surface 111 and the abutting surface 122 are in contact with each other, that is, the maximum angle that can be deployed, the pushing surface 111 and the abutting surface 122 abut each other, and the first blade member 11 and the second blade member are restricted. The expansion angle of 12, wherein, in order to increase the stability of the contact surface 111 and the abutment surface 122, the abutment surface 122 and the abutment surface 111 have contours corresponding to each other and can be properly fitted to each other, for example, The contact surfaces of the abutting surface 111 and the abutting surface 122 are parallel to each other, or a corresponding curved surface is formed, so that the pushing surface 111 and the abutting surface 122 can be stably contacted without arbitrarily sliding.

Referring to FIG. 2 and FIG. 3 , the handle 3 includes a rod body 34 , a first handle portion 31 and a second handle portion 32 . The rod body is a threaded screw, and the first handle portion 31 The second handle portion 32 is inserted into the rod body 34, and the inserted position is located at one end of the first handle portion 31 and the second handle portion 32, thereby being pivotally connected to allow the first handle portion 31 and the second handle The first shank portion 31 is connected to the first blade member 11 and the first shank portion 31 is coupled to the first blade member 11. The two shanks 32 and the second shank portion 32 are coupled to each other by a fixing rod. The cutter members 12 are connected, and the two are oscillated by the insertion and fixing of the latches 321 , whereby the grips are interlocked with the cutters, and as long as one of them is unfolded or folded, the other is also Will expand or collapse, but it is not limited to the complete relationship between the cutting tool and the handle, as long as the first handle When the first blade member 11 and the second blade member 12 are engaged with each other, the first blade member 11 and the second blade member 12 can be engaged with each other when the first blade member 11 and the second blade member 12 are mutually engaged. The first handle portion 31 and the second handle portion 32 are mutually unfolded; therefore, the connection between the handle portion and the blade member is such that the handle and the clip are in a linked relationship, as long as one of them is unfolded or folded, The other will expand or collapse simultaneously.

In the above embodiment, in order to increase the hand touch of the contact handle 3, the handle 3 includes two convex portions 331, 332, and one of the convex portions 331 is away from the first handle portion 31 away from the second handle portion 32. The other convex portion 332 extends from the second shank portion 32 away from the first shank portion 31. The convex portions 331 and 332 extend in opposite directions and are respectively located on the handle 3. The two sides, for the user to hold the first handle portion 31 and the second handle portion 32, can abut against the convex portions 331, 332; further, the first handle portion 31 and the second handle portion of the embodiment The surface of the portion 32 is provided with a non-slip layer, and the friction coefficient of the surface of the anti-slip layer is high, so that when the handle is gripped by the hand, slippage is less likely to occur.

Please refer to FIG. 4 , the elastic member 2 is provided with the handle 3 , and is sleeved and fixed to the rod body 34 . One end of the elastic member 2 abuts against the first blade member 11 and the other end abuts against the second blade member 12 . The elastic member 2 causes the first blade member 11 and the second blade member 12 to have a tendency to expand to a maximum angle at any time, that is, when the first blade member 11 and the second blade member 12 are folded together, they are compressed to The elastic member 2, and the elastic member 2 drives the first blade member 11 and the second blade member 12 to be unfolded until the first knife is provided, as long as no force is applied or the force for applying the handle is smaller than the elastic force of the elastic member 2. The pushing surface 111 of the piece 11 comes into contact with the abutting surface 122 of the second blade member 12 to stop the unfolding.

Referring to FIG. 2 to FIG. 4 , the cleats 4 are pivotally disposed on the first handle portion 31 and are swingable with each other. The cleat 2 of the embodiment is sleeved on the fixing rod and is opposite to the first handle portion 31 . Swinging; a side of the second handle portion 32 is disposed with a positioning slot 41. The positioning slot 41 has a contour conforming to the latch 321 to allow the latch 321 to abut against the edge of the positioning slot. When the first shank portion 31 and the second shank portion 32 are engaged with each other, the shackle 4 can be pivoted to cause the latch 321 to fall into the positioning slot 41. As shown in FIG. 3, the latch 321 is engaged with the edge of the positioning slot 41. When the first shank portion 31 and the second shank portion 32 are unable to be unfolded, the shearing device is interlocked with the shank portion, and the elastic member 2 is also restricted, so that the elastic member 2 cannot be supported. The first blade member 11 and the second blade member 12 are opened. If the user wants to release the restriction of the buckle member 4, the fastener member 4 can be moved away from the positioning groove 41 of the buckle member 4 by the elastic member 2. The elastic force causes the first blade member 11 and the second blade member 12 to be deployed to a preset maximum angle, as shown in FIG. 2; in order to facilitate the user to unlock the buckle 4, the buckle 4 of the embodiment is The edge of the positioning slot 41 is provided with an inclined surface 42 which is located on the other side of the edge of the positioning slot 41 when the latch 321 is engaged, so that when the latch 321 is engaged with the edge of the positioning slot 41, the first handle 31 is The second handle portion 32 is folded to drive the latch 321 against the inclined surface 42 , so that the buckle 4 can be pushed away by the inclination angle of the inclined surface 42 to drive the latch 321 away from the positioning slot 41 , thereby releasing the buckle 4 . For the abutment of the pin 321 .

When the cutting work is performed in the present invention, the cleat 4 can be moved first, so that the latch 321 of the second handle portion 32 does not get stuck against the cleat 4, that is, the first handle portion 31 and the second handle portion 32 can be smoothly deployed. Or folding, then the user can press the handle 3. The shearing tool 1 has the effect of cutting, and the user only needs to press the grip 3 to relax the force applied to the grip 3, and the grip 3 automatically expands and returns to the pressing by the elastic force of the elastic member 2. The front state; when the user wants to store, the handle 3 is folded to a predetermined angle, which is sufficient for the pin 321 of the second handle 32 to be engaged with the positioning groove 41 of the buckle 4, then the elastic member 2, the first blade member 11 and the second blade member 12 can no longer be opened, and the handle 3 is fixed by the restraining effect of the buckle 4, as shown in FIG.

The invention is characterized in that when the first blade member and the second blade member are deployed to a predetermined angle, the pushing surface of the first blade member contacts the abutting surface of the second blade member to form a blocking function, so that The cutting tool can no longer continue to expand, and the blocking function can bear the elastic force of the elastic member to open the first blade member and the second blade member, or the force of externally applying the unfolding, and the material of the first blade member and the second blade member are the same The hardness of the material is close, so that the contact surface of the other is not scratched and wears. Further, the contact area between the pushing surface and the abutting surface is large, which can reduce the force per unit area, and can avoid the cause. The local deformation occurs due to uneven force. Therefore, after the contact surface and the abutment surface are in contact with each other for a plurality of times, there is still no wear or other abutment on the contact surface, and the first blade and the second blade are maintained. The maximum angle at which the blade is unfolded maintains the cutting effect of the sheet shear.

Summarizing the above embodiments, the present invention provides a shearing device with a pushing surface and an abutting surface that can limit the deployment angle, thereby reducing the problem of wear on the contact surface, and the durability is excellent, so that the iron shear of the present invention is used after multiple uses. It can also maintain a stable tailoring effect, which is extremely progressive and conforms to the relevant provisions of the Patent Law. Patent application, please refer to the early approval of the patent by the bureau, and it is really sensible.

Conventional use:

61‧‧‧ cutting edge

611‧‧‧blade

612‧‧‧Connecting Department

62‧‧‧Handle

621‧‧‧handle

this invention:

1‧‧‧Cutter

11‧‧‧First knife

111‧‧‧Pushing face

112‧‧‧Knife

113‧‧‧Pivot Department

114‧‧‧Connecting Department

12‧‧‧second knife

122‧‧‧Abutment

123‧‧‧Knife

2‧‧‧Flexible parts

3‧‧‧Handle

31‧‧‧ first handle

32‧‧‧second handle

321‧‧‧ latch

331‧‧‧ convex

332‧‧‧ convex

34‧‧‧ rod body

4‧‧‧Bucks

124‧‧‧Pivot Department

125‧‧‧Connecting Department

41‧‧‧ positioning slot

42‧‧‧Sloping surface

Figure 1 is a plan view of a conventional tin shear

2 and 3 are plan views of the present invention.

Figure 4 is a partial exploded view of the present invention.

Figure 5 is a partial perspective view of the present invention.

1‧‧‧Cutter

11‧‧‧First knife

111‧‧‧Pushing face

112‧‧‧Knife

12‧‧‧second knife

122‧‧‧Abutment

123‧‧‧Knife

2‧‧‧Flexible parts

3‧‧‧Handle

31‧‧‧ first handle

32‧‧‧second handle

321‧‧‧ latch

331‧‧‧ convex

332‧‧‧ convex

34‧‧‧ rod body

4‧‧‧Bucks

41‧‧‧ positioning slot

42‧‧‧Sloping surface

Claims (8)

A metal shear comprising: a cutting tool comprising a first blade member and a second blade member, wherein the first blade member and the second blade member are in the shape of a bend and include a blade portion, a pivoting portion and a connecting portion Each of the pivoting portions is located between the blade portion and the connecting portion, and each of the pivoting portions is connected to each other such that the first blade member and the second blade member can be mutually deployed or folded, and during the folding process Each of the blade portions overlaps each other to produce a cutting effect, wherein the pivoting portion of the first blade member is provided with a pushing surface, and the edge of the blade portion of the second blade member is provided with an abutting surface for the second blade The pivoting portion of the piece is located between the abutting surface and the connecting portion of the second blade, and the abutting surface and the pushing surface have contours corresponding to each other and can be properly fitted to each other, wherein the pushing surface When the contact surface is in contact with the abutting surface, the first blade member and the second blade member are unable to be unfolded, and each of the blade portions is still in contact with each other; an elastic member is used to make the first blade member and the second blade member The piece has a tendency to expand to a maximum angle at any time; a handle includes a first handle and a second handle, the first handle The second shank is pivotally connected to the second shank, and the first shank is connected to the connecting portion of the first blade, and the second shank is connected to the connecting portion of the second blade. The grip is interlocked with the cutter, and as soon as one of them is unfolded or folded, the other is also unfolded or folded. The sheet shear according to claim 1, wherein one end of the elastic member abuts against the first blade and the other end abuts against the second blade. The tin shear of claim 2, wherein the handle comprises two protrusions, wherein one of the protrusions extends from the first handle away from the second handle, and the other protrusion is from the The second handle extends away from the first handle. The metal sheet shear of claim 3, further comprising a buckle piece pivotally disposed on the first handle portion and swingable relative to the first handle portion, the buckle piece being provided with a positioning groove, the first The two handles are provided with a latch. When the first handle and the second handle are folded together, the latch can be engaged with the edge of the positioning slot, so that the first handle and the second handle cannot be deployed. The metal sheet shear of claim 4, wherein the buckle is provided with an inclined surface at the edge of the positioning groove, the inclined surface is pushed by the latch to drive the pin away from the positioning groove. The sheet shear according to any one of claims 1 to 5, wherein the second handle and the second blade are connected to each other by insertion of the plug. The sheet shear according to claim 6, wherein a surface of the first handle and the second handle is provided with a slip-resistant layer. The sheet metal shear of claim 7, wherein the handle comprises a rod body, and the first handle portion and the second handle portion are connected to each other by insertion of the rod body, wherein the elastic member is sleeved In the rod body.