CN102398271A - Security Knife - Google Patents

Abstract

The invention relates to a safety cutter, comprising: the cutter body is provided with a handle, a blade and a sliding block, wherein the handle is provided with a sliding groove for accommodating the blade, and the blade is accommodated in the sliding groove; the protective sleeve comprises a sleeve body and a connecting part formed by extending the sleeve body backwards, the connecting part is pivoted with the tail part of the handle through a pivot, and the head part of the handle is positioned in the sleeve body; and the elastic element is arranged between the handle and the connecting part, the head part of the handle is kept in the sleeve body by the elastic element with preset elasticity, and when the middle part of the handle is pressed, the elastic element is compressed, and the head part of the handle rotates to the edge of the sleeve body. The safety medium knife comprises a medium knife body, a protective sleeve and an elastic element, wherein in a natural state, the head of the medium knife body is positioned in the sleeve body of the protective sleeve, and a blade of the medium knife is not exposed, so that the damage caused by mistaken contact of the blade can be prevented.

Description

Security Knife

technical field

The present invention relates to an intermediate knife, and more specifically relates to a safety intermediate knife.

Background technique

Jie knife, also known as utility knife, is a commonly used knife, which is widely used in various occasions, such as paper cutting and cutting in manual work. Existing knives generally include a plastic or metal handle, the handle is provided with a chute to accommodate the blade, and the blade is generally provided with a slider. When using the slider, the blade is stretched out from the head of the handle, and the When the cut is in progress, push the slide back to retract the blade into the handle when not in use. Because in the process of use, the blade is usually retracted into the handle when the work is completely finished. In the middle, the intermediate knife with the blade in the extended state is often placed on the operating table, and it is used when it is used. , because the blade of the Jie knife is extremely sharp, and the existing Jie knife lacks protective measures, when the operator picks up the Jie knife to use, there is a possibility that the hand will be scratched, and there is an unsafe factor for the operator. The safety factor is especially obvious for children.

Contents of the invention

The technical problem to be solved by the present invention is to provide a safety knife that can effectively prevent accidental injury when using the knife in order to solve the above-mentioned unsafe defects of the knife in the prior art.

The technical scheme adopted by the present invention to solve its technical problems is: construct a kind of safety intermediary knife, comprising:

The knife body, the knife body includes a handle, a blade and a slider, the handle has a chute for accommodating the blade, the blade is received in the chute, and the slider is arranged in the chute and connected to the blade;

A protective cover, the protective cover includes a cover body and a connecting part formed by extending backward from the cover body, the connecting part is pivotally connected to the tail of the handle through a pivot, and the head of the handle is located in the cover;

An elastic element, the elastic element is arranged between the handle and the connecting part, the elastic element keeps the head of the handle in the sleeve with a predetermined elastic force, and when the middle part of the handle is pressed, the The elastic element is compressed, and the head of the handle turns to the edge of the sleeve.

In the safety knife according to the present invention, the protective cover is made of transparent or translucent material.

In the safety intermediary knife according to the present invention, the cross section of the sleeve body is elliptical.

In the safety knife according to the present invention, the front end of the sleeve body has a first inclined plane and a second inclined plane connected, and the included angle between the first inclined plane and the extending direction of the sleeve body is larger than that of the second inclined plane. The included angle with the extending direction of the casing.

In the safety intermediary knife according to the present invention, the front end of the sleeve body has a convex arc surface.

In the safety intermediary knife according to the present invention, a strip-shaped opening is formed on the sleeve, and the strip-shaped opening faces the chute of the handle.

In the safety knife according to the present invention, the connecting part has two circular lugs, and the lugs are provided with round holes adapted to the pivot.

In the safety knife according to the present invention, the pivot is a bolt.

In the safety knife according to the present invention, the elastic element is an arc-shaped elastic metal sheet.

In the safety knife according to the present invention, the elastic element is a torsion spring.

Implementing the safety intermediary knife of the present invention has the following beneficial effects: in the safety intermediary knife of the present invention, comprising intermediary knife body, protective cover and elastic element, during natural state, the head of intermediary knife body is positioned at the cover body of protective sheath , the blade of the intermediary knife is not exposed, which can prevent damage caused by accidentally touching the blade. When using, press the middle part of the intermediary knife body, and the head of the intermediary knife turns to the edge of the sleeve body, and can be used normally. The safety intermediary knife of the present invention is especially suitable It is used by children, has very good protection function, and also has the advantages of simple structure and low cost.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is the schematic diagram that the preferred embodiment of safety intermediary knife of the present invention is in natural state;

Fig. 2 is a schematic diagram of a preferred embodiment of the safety knife of the present invention in use;

Fig. 3 is the schematic diagram of the protective sleeve in the preferred embodiment of the safety knife of the present invention;

Fig. 4 is a front view of the protective cover shown in Fig. 3;

Fig. 5 is a right side view of the protective cover shown in Fig. 3;

Fig. 6 is the schematic diagram of the elastic element in the preferred embodiment of the safety knife of the present invention;

Fig. 7 is a schematic diagram of the intermediate knife body in a preferred embodiment of the safety knife according to the present invention;

Fig. 8 is a schematic diagram of the first use posture of the preferred embodiment of the safety intermediary knife of the present invention;

Fig. 9 is a schematic diagram of the second usage posture of the preferred embodiment of the safety intermediary knife of the present invention.

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in Figures 1 and 2, it is a preferred embodiment of the safety knife of the present invention. In this embodiment, the safety knife includes a knife body 100, a protective cover 200, and an elastic element 300, see FIG. 7 The knife body 100 includes a handle 110, a blade 120 and a slider 130, the handle 110 has a chute 111 for accommodating the blade 120, the blade 120 is received in the chute 111, the blade 120 is provided with a slider 130, pushed to the slider 130 That is to make the blade 120 slide in the chute 111; referring to Fig. 3, Fig. 4 and Fig. 5, the protective cover 200 includes a cover body 210 and a connecting part 220 extending backward from the cover body 210, and the connecting part 200 and the tail of the handle 110 pass through A pivot 400 is pivotally connected, and the head 112 of the handle 110 is located in the sleeve body 210; the elastic element 300 is arranged between the handle 110 and the connecting portion 220 of the protective sleeve 200, and the elastic element 300 keeps the head of the handle 110 with a predetermined elastic force. In the sleeve body 210, when the middle part of the handle 110 is pressed, the elastic element 300 is compressed, the head 112 of the handle 110 turns to the edge of the sleeve body 210, and the blade 120 protruding from the head 112 of the handle 110 can expose the sleeve body 210, you can use Jiedao normally.

Referring to FIG. 1 to FIG. 6 , in this embodiment, the cross-sectional shape of the protective cover 200 is elliptical, which is easy to grasp and use of the safety knife. Elastic element 300 is an arc-shaped elastic metal sheet, which can be steel sheet, copper sheet or other metal or alloy sheet with good elasticity. Regarding the placement of the elastic element 300, it should be understood that the elastic element is not limited to a metal sheet, and may also be in the form of a torsion spring. In this embodiment, in order to facilitate the pivot connection between the connecting part 220 and the handle 110, the connecting part 220 has two circular ear pieces 222, and the ear pieces 222 have round holes 223 adapted to the pivot 400. In this embodiment, In the example, the pivot 400 is a bolt, but it can also be other shaft-shaped objects in practice.

1 to 4, in this embodiment, in order to facilitate use, the front end of the cover body 210 of the protective cover 200 has a connected first slope 211 and a second slope 212, wherein the first slope 211 is aligned with the extension direction of the cover body 210 The included angle is larger than the included angle between the second slope 212 and the extending direction of the sleeve body 210. Referring to FIG. The included angle of the extension direction is about 10 to 30 degrees, preferably 20 degrees, which is more comfortable to operate; referring to Fig. 9, when the operator uses the knife in the posture of holding a pen, the first inclined surface 211 is in contact with the desktop or the operating platform, and the second The included angle between the inclined surface 211 and the extending direction of the casing 210 is 30 to 60 degrees, and in this embodiment, it is 35 degrees. In this implementation, the protective cover 200 is made of a transparent material, such as acrylic material, or other transparent plastics, which can be made into a cylindrical shape first, and then hot-pressed into an elliptical cross-section. It should be understood that the protective cover 200 can also be made Translucent, or opaque, but preferably transparent or translucent, so that it is convenient for the operator to observe the position of the blade. It should be understood that the front end of the sleeve 210 can also be configured as a convex arc surface, for example, when cutting paper, the arc surface is just tangent to the paper surface, which is convenient for the use of the knife.

In order to make the blade of the safety intermediary knife shorter, there is a strip opening 213 on the sleeve body 210, and the strip opening 213 is facing the chute 111 of the handle 110, so that when the blade becomes shorter, the slider 130 still It can be pushed to the front end of the handle 110 without the slider 130 being unable to be pushed to the front end of the handle 110 due to the addition of the sleeve 210 .

When the safety knife of the present invention is in a natural state, as shown in Figure 1, under the action of the elastic element 300, the head of the knife body 100 is kept in the sleeve 210, which can effectively prevent damage caused by accidental touch. The state during use is shown in Figure 2, press the handle 110 of the knife body 100, compress the elastic element 300, the head of the knife body 100 turns to the edge of the front end of the sleeve body 210, and the blade 120 is exposed from the sleeve body 210.

It should be understood that the knife body 100 in this embodiment is only schematic, and various knife tools can be transformed into safety knife tools by adopting the solution of the present invention.

In the safety knife of the present invention, it includes the knife body, the protective cover, and the elastic element. In the natural state, the head of the knife body is located in the sleeve of the protective cover, and the blade of the knife is not exposed, which can prevent accidental contact. For the damage caused by the blade, press the middle part of the knife body during use, and the head of the knife turns to the edge of the sleeve body, and can be used normally. The safety knife of the present invention is especially suitable for children, and has a very good protective function, and also has The utility model has the advantages of simple structure, low cost and the like.

Embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementations, and the above-mentioned specific implementations are only illustrative, rather than restrictive, and those of ordinary skill in the art will Under the enlightenment of the present invention, many forms can also be made without departing from the gist of the present invention and the protection scope of the claims, and these all belong to the protection of the present invention.

Claims (10)

1. A safety knife, characterized in that it comprises: The knife body, the knife body includes a handle, a blade and a slider, the handle has a chute for accommodating the blade, the blade is received in the chute, and the slider is arranged in the chute and connected to the blade; A protective cover, the protective cover includes a cover body and a connecting part formed by extending backward from the cover body, the connecting part is pivotally connected to the tail of the handle through a pivot, and the head of the handle is located in the cover; An elastic element, the elastic element is arranged between the handle and the connecting part, the elastic element keeps the head of the handle in the sleeve with a predetermined elastic force, and when the middle part of the handle is pressed, the The elastic element is compressed, and the head of the handle turns to the edge of the sleeve. 2. The safety knife according to claim 1, characterized in that, the protective cover is made of transparent or translucent material. 3. The safety intermediary knife according to claim 1, characterized in that, the cross-section of the sleeve is elliptical. 4. The safety knife according to claim 1, characterized in that, the front end of the sleeve body has a first inclined plane and a second inclined plane connected to each other, and the included angle between the first inclined plane and the extending direction of the sleeve body is greater than the angle between the second slope and the extending direction of the sleeve. 5. The safety knife according to claim 1, characterized in that, the front end of the sleeve has a convex arc surface. 6 . The safety knife according to claim 1 , wherein a strip-shaped opening is formed on the sleeve body, and the strip-shaped opening faces the chute of the handle. 7 . 7 . The safety knife according to claim 1 , wherein the connecting portion has two circular lugs, and the lugs are provided with round holes adapted to the pivot. 8 . 8. The safety knife according to claim 1, wherein the pivot is a bolt. 9. The safety knife according to claim 1, wherein the elastic element is an arc-shaped elastic metal sheet. 10. The safety knife according to claim 1, wherein the elastic element is a torsion spring.

Images