Cutting tool with replaceable blade

Abstract

The cutting tool comprises the blade and a tool handle, the front portion of the back of the blade is provided with a first connecting portion, the tool handle comprises a supporting portion, a combining portion and a handheld portion, the handheld portion is combined with the supporting portion through the combining portion, the handheld portion is bent and extends backwards and downwards, and the first connecting portion is connected with the supporting portion. The supporting part extends downwards from the combining part to the first connecting part, a second connecting part is arranged at the lower end of the supporting part, and the first connecting part and the second connecting part are detachably and fixedly connected. According to the cutting tool with the replaceable blade, different blades can be replaced, various cutting functions can be achieved, and the specially-designed partitioned bent tool handle conforms to ergonomics in use, saves labor and is high in cutting efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cutting tool, particularly to a cutting tool with replaceable blade. BACKGROUND

[0002] The existing cutting knife's handle is usually integral with the blade and cannot be detached, and the handle is generally located above the back of the blade, which is not ergonomic and low in use efficiency.

[0003] There is still a need for a cutting tool with replaceable blade and high use efficiency. SUMMARY

[0004] To solve the above problems in the prior art, the utility model discloses a novel cutting tool, which can replace different blades to realize multiple functions, and the specially designed handle can be conveniently detached from the blade and is ergonomic and high in cutting efficiency.

[0005] Specifically, the utility model discloses a cutting tool with replaceable blade, which comprises a blade and a handle. The blade comprises a blade back and a blade edge. The front part of the blade back is provided with a first connecting part. The handle comprises a supporting part, a connecting part and a hand holding part combined with the supporting part through the connecting part. The hand holding part is curved and extends downward from the connecting part. The supporting part extends downward from the connecting part to the first connecting part and is provided with a second connecting part at the lower end. The handle is combined by a first handle and a second handle which are symmetric to each other through screw nut cooperation. The first connecting part of the blade is provided with a groove and a screw hole. The upper part of the second connecting part of the first handle is provided with a first circular arc groove facing the groove below the first circular arc groove. The upper part of the second connecting part of the second handle is provided with a second circular arc groove facing the groove below the second circular arc groove. The blade is fixedly connected to the handle by positioning the cylindrical body transversely through the groove and placing the part protruding from the groove transversely into the first circular arc groove and the second circular arc groove, and screwing the screw through the first screw hole, the screw hole and the second screw hole, and screwing the handle to the blade through the screw nut cooperation.

[0006] Those skilled in the art should understand that the directional terms in the utility model, such as but not limited to "up", "down", "front", "back", "top", "horizontal", etc. are only for the purpose of conveniently describing the utility model and are relative concepts, and are not intended to limit the utility model.

[0007] In one embodiment, the shank is a metal piece.

[0008] In one preferred embodiment, a plurality of lightening holes are provided on the shank. The lightening holes can be of the same shape or different shapes.

[0009] In one preferred embodiment, the handgrip portion of the shank comprises a first part for operating the front arc blade of the blade and a second part for operating the remaining part of the blade. By designing the handgrip portion for operating the first part of the front arc blade and the second part of the remaining blade, the different parts of the blade can be used more efficiently and effectively for cutting operations.

[0010] In one preferred embodiment, a conformable plastic piece is further fixed on the handgrip portion of the shank. The plastic piece can improve the comfort and safety of operation.

[0011] In one preferred embodiment, the top plane of the part of the plastic piece conforming to the first part is parallel to the front arc blade, and the top plane of the part of the plastic piece conforming to the second part is parallel to the remaining blade.

[0012] In one preferred embodiment, the front top end of the plastic piece is provided with a place for placing the thumb.

[0013] In one preferred embodiment, the tail end of the handgrip portion is provided with a hanging hole for hanging the cutting tool with replaceable blade.

[0014] The cutting tool with replaceable blade in the utility model can conveniently replace different blades, can realize multiple cutting functions, and the specially designed partitioned curved shank is not only ergonomic, labor-saving and high in cutting efficiency in use. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Fig. 4 is a perspective exploded view of the cutting tool with replaceable blade in a state where the blade and the shank are separated.

[0016] Figure 2 Fig. 5 is a perspective exploded view of the shank in Fig. 4 including a conformable plastic piece. Figure 1

[0017] Figure 3 Fig. 6 is a perspective view of the cutting tool with replaceable blade in the utility model in a state where the blade and the shank are assembled. DETAILED DESCRIPTION

[0018] ​The utility model will be further described below in conjunction with the drawings. It should be clear that the specific embodiments of the utility model described in the drawings are only for illustrating the utility model, and they are not strictly drawn according to actual size and proportion. Therefore, the drawings in the utility model should not be interpreted as any limitation on the utility model. The embodiments listed in the present application are only exemplary and do not limit the protection scope of the utility model. The protection scope of the utility model is defined by the claims.

[0019] For the sake of brevity, not all parts or features are labeled in some drawings, so when reading the following description, all drawings should be referred to each other to clearly and completely understand the utility model.

[0020] Referring to Figures 1-3 . Figure 1 A perspective exploded schematic view showing the blade and the shank of the cutting tool with replaceable blade of the utility model in a separated state is shown. As shown in Figure 1 , the cutting tool with replaceable blade of the utility model comprises a shank composed of mutually symmetrical first shank 100-1 and second shank 100-2, and a blade 200. The blade 200 has a blade back 210 and a blade edge 220, wherein the first connecting part 211 is provided at the front part of the blade back 210. The blade edge 220 comprises a forwardly upwardly extending front blade edge, i.e. an arc-shaped edge 222, and other remaining blade edges extending rearwardly, i.e. flat edges 221, which are smoothly connected with the arc-shaped edge 222.

[0021] The mutually symmetrical first shank 100-1 and second shank 100-2 respectively comprise a supporting part 110-1, 110-2, a combining part 130-1, 130-2, and a hand-holding part 120-1, 120-2 combined with the supporting part 110-1, 110-2 through the combining part 130-1, 130-2. The hand-holding part 120-1, 120-2 is curved and extends downwardly rearwardly. The supporting part 110-1, 110-2 extends downwardly from the combining part 130-1, 130-2 towards the first connecting part 211, and has a second connecting part 111-1, 111-2 at the lower end.

[0022] The first connecting part 211 of the blade 200 is provided with a slot 216 and a screw hole 212. In addition, a cylindrical body 60 is also provided. The height of the slot 216 is equal to or slightly greater than the diameter of the cylindrical body 60, and the length direction of the slot 216 is consistent with the length direction of the cylindrical body 60, so that the cylindrical body 60 can pass through the slot 216 in the transverse direction. In addition, one screw hole 212 is provided at the first connecting part 211.

[0023] A first circular-arc groove 116-1 is provided on the upper portion of the second connecting portion 111-1 of the first shank 100-1 and faces the groove 216 of the blade 200. The radius of the circular arc of the first circular-arc groove 116-1 is equal to or slightly greater than the radius of the cylindrical body 60. Below the first circular-arc groove 116-1 is provided a first screw hole 112-1 which cooperates with the screw hole 212 on the first connecting portion 211.

[0024] A second circular-arc groove 116-2 is provided on the upper portion of the second connecting portion 111-2 of the second shank 100-2 and faces the groove 216 of the blade 200. The radius of the circular arc of the second circular-arc groove 116-2 is equal to or slightly greater than the radius of the cylindrical body 60. Below the second circular-arc groove 116-2 is provided a second screw hole 112-2 which cooperates with the screw hole 212 on the first connecting portion 211.

[0025] The blade 200 can be detachably connected to the shanks by positioning the cylindrical body 60 transversely through the groove 216 and placing the portions of the cylindrical body 60 which protrude transversely out of the groove 216 into the first circular-arc groove 116-1 of the second connecting portion 111-1 of the first shank 100-1 and the second circular-arc groove 116-2 of the second connecting portion 111-2 of the second shank 100-2 respectively, and then screwing the screw 50-1 through the first screw hole 112-1, the screw hole 212 and the second screw hole 112-2 and cooperating with the nut 50-2.

[0026] The detachable connection makes the blade replacement operation simple and fast.

[0027] In order to improve the cutting efficiency of the utility model, the hand-holding portion 120-1 of the first shank 100-1 can include a first portion 121-1 for operating the arc-shaped blade 222 and a second portion 122-1 for operating the flat blade 221. Correspondingly, the hand-holding portion 120-2 of the second shank 100-2 can include a first portion 121-2 for operating the arc-shaped blade 222 and a second portion 122-2 for operating the flat blade 221. Through the above design, the different parts of the blade can be used for cutting operation not only labor-saving but also more efficient.

[0028] The first shank 100-1 and the second shank 100-2 are preferably made of metal, such as stainless steel.

[0029] A plurality of weight-reducing holes 20-1, 20-2 can be provided on the first shank 100-1 and the second shank 100-2 respectively. The shapes of the weight-reducing holes 20-1, 20-2 can be the same or different, such as circular, elliptical or other smooth shapes. The purpose of the weight-reducing holes 20 is to reduce the weight of the shanks without affecting the strength.

[0030] Preferably, as shown in Figure 2 andFigure 3 As shown, the shank can also be assembled with a first plastic piece 300-1 and a second plastic piece 300-2 conforming to the first shank 100-1 and the second shank 100-2 respectively. The first plastic piece 300-1 and the second plastic piece 300-2 are connected and fixed with the first shank 100-1, the blade 200 and the second shank 100-2 through a plurality of screws 50'-1 and a corresponding plurality of screw caps 50'-2 respectively. The first plastic piece 300-1 and the second plastic piece 300-2 are respectively provided with a thumb rest 310-1, 310-2 for placing the thumb of the operator at the front top end thereof when the assembly is completed.

[0031] Figure 3 A perspective view of an assembled replaceable blade cutting tool is shown. The first shank 100-1 and the second shank 100-2 are connected and fixed with the blade 200 through a plurality of screws 50-1 and a corresponding plurality of screw caps 50-2. Figure 3 As shown, when the assembly is completed, the cylinder 60 is clamped between the first circular arc groove 116-1 and the second circular arc groove 116-2. The first plastic piece 300-1 and the second plastic piece 300-2 together form a plastic piece 300, and the plastic piece 300, the first shank 100-1, the blade 200 and the second shank 100-2 together form a shank 100' with the plastic piece 300.

[0032] The plastic piece 300 also includes a first portion 121' at the upper part adapted to operate the front arc-shaped blade 222 and a second portion 122' at the lower part adapted to operate the remaining flat blade.

[0033] The top plane 321 of the first portion 121' is preferably parallel to the front arc-shaped blade 222, and the top plane 322 of the second portion 122' is preferably parallel to the remaining flat blade 221.

[0034] The front top end of the plastic piece 300 assembled by the first plastic piece 300-1 and the second plastic piece 300-2 is a thumb rest 310. In this way, when the user holds the first portion 121' with the other fingers, the thumb is placed at the thumb rest 310, which facilitates the force and improves the use comfort.

[0035] In the present utility model, the term "conform" means that the shape of the part of the plastic piece in contact with the metal piece of the shank is adapted to the shape of the metal piece of the shank, so as to ensure that the plastic piece is closely attached to the metal piece of the shank.

[0036] Based on the description of the preferred embodiments of the present utility model, it should be clear that the present utility model as defined by the appended claims is not limited to the specific details set forth in the foregoing specification, and many obvious changes to the present utility model without departing from the purpose or scope of the present utility model can also achieve the purpose of the present utility model.

Claims

1. A replaceable blade cutting tool comprising a blade and a shank, the blade comprising a blade back and a blade edge, characterized in that, The front part of the blade back has a first connecting part, the handle comprises a supporting part, a combining part and a handgrip part combined with the supporting part through the combining part, the handgrip part is curved and extends downwardly and backwardly from the combining part, the supporting part extends downwardly from the combining part towards the first connecting part and has a second connecting part at the lower end, wherein the handle is combined by screwing and nut fitting of the first handle and the second handle which are mutually symmetrical, the first connecting part of the blade is provided with a slot and a screw hole, the upper part of the second connecting part of the first handle is provided with a first circular arc slot facing the slot at the corresponding position of the slot, the lower part of the first circular arc slot is provided with a first screw hole, the upper part of the second connecting part of the second handle is provided with a second circular arc slot facing the slot at the corresponding position of the slot, the lower part of the second circular arc slot is provided with a second screw hole, and further comprising a cylindrical body, wherein the cylindrical body is positioned by being transversely passed through the slot and being placed into the first circular arc slot and the second circular arc slot respectively with the part protruding transversely from the slot, and the blade is fixedly connected to the handle by screwing and nut fitting of the screw, the screw hole and the second screw hole.

2. The replaceable blade cutting tool according to claim 1, characterized in that, The handle is a metal piece.

3. The replaceable blade cutting tool according to claim 1 or 2, characterized in that, The handle is provided with a plurality of lightening holes.

4. The replaceable blade cutting tool according to Claim 1, wherein The handgrip part of the handle comprises a first part for operating the front arc blade of the blade and a second part for operating the remaining part of the blade.

5. The replaceable blade cutting tool according to claim 4, wherein The handgrip part of the handle is further fixedly provided with a plastic piece conforming thereto.

6. The replaceable blade cutting tool according to claim 5, wherein The top plane of the part of the plastic piece conforming to the first part is parallel to the front arc blade, and the top plane of the part of the plastic piece conforming to the second part is parallel to the remaining part of the blade.

7. The replaceable blade cutting tool according to claim 6, wherein The front top end of the plastic piece is provided with a place for placing the thumb.

8. The replaceable blade cutting tool according to Claim 1, wherein The tail end of the handgrip part is provided with a hanging hole for hanging the cutting tool of the replaceable blade.

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