TWM646465U - cutting tool - Google Patents

Abstract

A cutting tool includes a cutter unit and a sharpening unit. The cutter unit includes a housing, an accommodation space defined by the housing, a sliding operating block provided on the housing, and a sliding operating block provided on the housing. A blade body is provided in the accommodation space and is connected to the sliding operating block, and a blade portion is provided on the blade body. The sharpening unit includes a sharpening structure that is disposed in the accommodation space and is in contact with the blade portion. The sliding The operating block moves relative to the housing and drives the blade body to move. When the blade body moves, the sharpening structure rubs the blade edge to make it sharp.

Description

cutting tool

The present invention relates to a cutting device, in particular to a cutting tool that can be automatically ground to sharpen the blade.

A knife is a common tool that can cut objects into required sizes. Common tools include utility knives, scissors, cutters, etc. Among them, a utility knife is a convenient tool. The blade can be folded to avoid accidentally cutting. For other items, the blade can also be deployed to allow the user to quickly cut items.

Among them, the shell used in general utility knives is equipped with a see-through window so that the user can directly see the blade set inside. However, the blade set inside will always be in contact with the outside air through the see-through window, making it easy for the blade to Rusty, and when the blade is used for a period of time and the blade is not sharp, the blade will be broken, or the blade must be replaced entirely, resulting in a waste of resources. In addition, when the replaced blade is not handled properly and comes into contact with personnel, it is easy to cause injury.

From the above description, it can be seen that the current use of cutting tools has the following shortcomings:

1. Easy to rust: Since the shell of a general utility knife is equipped with a see-through window, the blade will not only come into contact with the outside air when in use, but also come into contact with the outside air through the see-through window when the blade is stored. When the blade is constantly exposed to moisture in the air , its metal material will oxidize quickly, causing the blade to rust quickly.

2. The blade is easily blunted: The blades installed in general utility knives are thin, and after being used for a period of time, they are easily worn out and become less sharp. In addition, even if the blades are not in use, the shell cannot block the air, so The resulting oxidation state can also cause blade deformation, so the blades installed in general utility knives tend to become dull.

3. Waste of resources: Continuing from the above, because the blades in current utility knives are not only easy to rust, but also cannot prevent the blade from becoming less sharp, the blades are often replaced, which is not only not environmentally friendly, but also causes a waste of resources. When replaced, When the blade is not handled properly, it is easy to injure people.

Therefore, how to reduce the oxidation rate of the tool and delay the dulling of the blade, thereby extending the service life of the blade in the tool, is an urgent goal for relevant technical personnel.

In view of this, the purpose of the present invention is to provide a cutting tool.

The cutting tool includes a cutting unit and a sharpening unit.

The tool unit includes a housing, an accommodating space defined by the housing, a sliding operating block provided in the housing, a blade body provided in the accommodating space and connected to the sliding operating block, and A blade portion is provided on the blade body. The sliding operating block moves relative to the housing and drives the blade body to move.

The sharpening unit includes a sharpening structure disposed in the accommodation space and in contact with the blade portion, wherein the sliding operating block is disposed on the upper side of the blade body, and the sharpening structure is disposed on the lower side of the blade body.

Another technical means of the present invention is that the above-mentioned sharpening structure is a grinding stone fixed to the housing.

Another technical means of the present invention is that the above-mentioned sharpening structure is a grindstone disc pivoted to the housing, and the sharpening structure rotates relative to the housing.

Another technical means of the present invention is that the above-mentioned sharpening unit further includes a gear fixed on the sharpening structure and a transmission belt fixed on the sliding operating block. The transmission belt and the gear are toothed with each other. When the sliding operating block moves relative to the housing, it drives the sharpening structure to rotate relative to the housing.

Another technical means of the present invention is that the above-mentioned grinding unit further includes a backstop structure disposed between the gear and the grinding structure. The backstop structure is used to limit the rotation direction of the grinding structure.

Another technical means of the present invention is that the above-mentioned backstop structure has an internal tooth member provided on the gear, and an elastic support member provided on the grinding structure, and the elastic support member elastically supports the Internal gear parts.

Another technical means of the present invention is that the above-mentioned sharpening unit further includes another sharpening structure, and the tool unit further includes two corresponding inclined surfaces provided on the blade portion, and the two sharpening structures are respectively in contact with the blade portion. of two inclined planes.

Another technical means of the present invention is that the above-mentioned cutter unit further includes a blade opening provided in the housing, and the blade opening allows the blade body to extend outward from the accommodation space.

Another technical means of the present invention is that the above-mentioned tool unit further includes a slider opening provided in the housing. The slider opening allows the sliding operation block to extend outward from the accommodation space. The sliding operation block The block is movably disposed in the slider opening.

Another technical means of the present invention is that the above-mentioned knife unit further includes a folding knife part detachably connected to the housing.

The beneficial effect of the present invention is that the sharpening structure provided in the housing resists both sides of the blade. When the blade body moves, the sharpening structure grinds the bevel of the blade to make it sharp. In addition, the sharpening structure can also be a rotating grindstone disc, which can make the surface of the sharpening structure more even for the part used by the blade, and the grinding direction of the blade is in addition to the traverse direction of the blade body. In addition, it also has a longitudinal direction when the sharpening structure rotates, which can make the structure of the blade portion sharper.

The relevant patent application features and technical contents of this new model will be clearly presented in the following detailed description of the two preferred embodiments with reference to the drawings. Before proceeding to the detailed description, it should be noted that similar components are designated with the same number.

Referring to Figures 1, 2, and 3, a first preferred embodiment of a cutting tool 3 of the present invention is shown. The cutting tool 3 includes a cutting unit 31 and a sharpening unit 32.

The tool unit 31 includes a housing 311, an accommodating space 312 defined by the housing 311, a sliding operating block 313 provided on the housing 311, and a sliding operating block 313 provided on the accommodating space 312. The block 313 connects the blade body 314, a blade portion 315 provided on the blade body 314, a blade opening 316 provided on the housing 311, a slider opening 317 provided on the housing 311 and a detachable The folding blade portion 318 is connected to the housing 311 .

Looking back at Figures 1 and 2, in the first preferred embodiment, the tool unit 31 is a utility knife, and the slide opening 317 provides the sliding operation block 313 to extend outward from the accommodating space 312. The sliding operation The block 313 moves relative to the housing 311 and drives the blade body 314 to move. The sliding operation block 313 is movably disposed in the slider opening 317. The blade opening 316 allows the blade body 314 to extend outward from the accommodation space 312. It is noted that the structure of the folding knife part 318 is a cover with a slit. After the folding knife part 318 is separated from the housing 311, the blade body 314 can be withdrawn from the accommodating space 312 for the user to replace the blade. The blade body 314. In addition, the slits on the folding blade portion 318 can be used to break the blade body 314. In actual implementation, the cutter unit 31 can use other cutters with telescopic blade bodies 314. This should not be used. is limited. Among them, the internal structure of the housing 311 can limit the moving direction of the blade body 314. In actual operation, a track structure can be provided in the housing 311, and the sharpening unit 32 is provided in the track structure. This should not be used in this way. Examples of preferred embodiments are limited. Among them, the overall structure of the housing 311 is closed, and only the blade opening 316 and the slider opening 317 are provided to prevent the blade body 314 from contacting the outside air when it is in the accommodation space 312. This slows down the oxidation and rusting of the blade body 314 .

Looking back at FIG. 3 , which is a front cross-sectional view of the cutting tool 3 , the sharpening unit 32 includes two sharpening structures 321 disposed in the accommodating space 312 and in contact with the blade portion 315 . In actual implementation, the casing 311 Only one sharpening structure 321 can be provided, and should not be limited to this. The sharpening structure 321 is a grinding stone fixed in the housing 311 . The right sharpening structure 321 is relatively close to the blade opening 316 of the cutter unit 31 , and the left sharpening structure 321 is relatively far away from the blade opening 316 of the cutter unit 31 . 316. The cutter unit 31 further includes two inclined surfaces 3151 corresponding to the blade portion 315. The two sharpening structures 321 respectively contact the two inclined surfaces 3151 on the blade portion 315. When the sliding operating block 313 pushes the blade body 314 to move, The two bevels 3151 on the blade portion 315 rub against the two grinding structures 321 respectively, so that the two grinding structures 321 grind the two bevels 3151 to sharpen the blade portion 315 .

It is worth mentioning that the sliding operating block 313 is disposed on the upper side of the blade body 314, and the sharpening structure 321 is disposed on the lower side of the blade body 314. When the user operates the sliding operating block 313, the blade body can be sharpened. 314, when the blade body 314 moves on the sharpening structure 321, the pressing force can cause the sharpening structure 321 to grind off more metal on the folding knife portion 318.

Please refer to Figures 4 and 5, which is a second preferred embodiment of a cutting tool 3 of the present invention. The second preferred embodiment is substantially the same as the first preferred embodiment, and the similarities will not be described in detail here. The difference is that the sharpening structure 321 is a grindstone disc pivotally connected to the housing 311. The sharpening structure 321 rotates relative to the housing 311. The sharpening unit 32 further includes a grinding wheel fixed to the sharpening structure. The gear 322 of 321, and a transmission belt 323 fixed to the sliding operating block 313.

Preferably, the transmission belt 323 is a regular belt. The sliding operation block 313 tightly clamps the transmission belt 323. The transmission belt 323 and the gear 322 are toothed with each other. The sliding operation block 313 is relative to the housing 311. When moving, the sharpening structure 321 is driven to rotate relative to the housing 311. Please refer to Figure 4, which is a front cross-sectional view of the cutting tool 3. One of the two sharpening structures 321 is relatively close to the blade opening. 316. Another sharpening structure 321 is relatively far away from the blade opening 316. The rotation axis of the two sharpening structures 321 is pivotally connected to the housing 311. When the sliding operating block 313 moves, it will rotate through the transmission belt 323. The two sharpening structures 321.

The difference between the second preferred embodiment and the first preferred embodiment is that in the first preferred embodiment, the two sharpening structures 321 are fixed and the blade body 314 grinds the blade in a transverse manner. In the blade portion 315, only a fixed area of the two sharpening structures 321 will contact the blade body 314. After being used for a period of time, the two sharpening structures 321 will be deformed due to wear, thus causing the appearance of the blade portion 315 to change. At this time, the two grinding blade structures 321 cannot be grinded normally and must be replaced.

In the second preferred embodiment, the grinding method of the two sharpening structures 321 not only includes the lateral movement direction of the blade body 314, but also includes the longitudinal movement direction of the two sharpening structures 321 when rotating. The cutting tool 3 The sharpening method is closer to manual sharpening. Grinding the blade at a 45-degree angle can make the blade portion 315 sharper. In addition, the two grinding blade structures 321 that are sharpened in a rotary manner can be worn more evenly. The surface of the two grinding blade structures 321 will only be worn evenly and will not be prone to deformation. The service life of the two sharpening structures 321 can be improved.

In addition, the grinding unit 32 further includes a backstop structure 324 disposed between the gear 322 and the grinding structure 321. The backstop structure 324 is used to limit the rotation direction of the grinding structure 321. Preferably, the backstop structure 324 has an internal tooth 3241 provided inside the gear 322, and an elastic support 3242 provided on the grinding structure 321. The elastic support 3242 elastically supports the internal tooth. The inner gear member 3241 has a plurality of inwardly protruding bumps.

Please refer to Figures 4 and 5. The rotation axis of the grinding structure 321 is arranged inside the gear 322. Rotating the rotation axis of the grinding structure 321 will cause the entire grinding structure 321 to rotate synchronously. The elastic support member 3242 has a supporting end and an elastic side, and the transmission belt 323 is connected to the sliding operating block 313 and the gear 322 through two auxiliary wheels 325 . When the sliding operating block 313 moves to the right, the transmission belt 323 will drive the gear 322 to rotate clockwise. At this time, the convex block of the internal tooth member 3241 contacts the supporting end of the elastic supporting member 3242, so as to The rotation axis of the sharpening structure 321 is pushed to rotate clockwise. When the sliding operation block 313 moves to the left, the transmission belt 323 will drive the gear 322 to rotate counterclockwise. At this time, the convex block of the internal tooth member 3241 touches the elastic side of the elastic support member 3242, and the The elastic side portion will cause the elastic supporting member 3242 to be elastically pressed and will not be pushed by the bump of the internal gear member 3241. At this time, the rotation axis of the sharpening structure 321 will not rotate.

Preferably, the usage scenario of the backstop structure 324 is: when the sliding operation block 313 pushes the blade body 314 outward from the accommodating space 312, the sharpening structure 321 rotates to carry out the rotation of the blade portion 315. Grind. When the sliding operating block 313 retracts the blade body 314 from the outside into the accommodating space 312, the sharpening structure 321 will not rotate, thereby reducing the wear of the blade body 314 and the sharpening structure 321.

It is worth mentioning that the sharpening unit 32 can also be driven by an electric motor and does not need to be driven by the sliding operating block 313, and should not be limited to the example of this preferred embodiment.

From the above description, it can be seen that the cutting tool 3 of the present invention does have the following functions:

1. Slow down rust: The overall structure of the housing 311 is closed, and there are only two openings, the blade opening 316 and the slider opening 317, to prevent the blade body 314 from greatly reducing the contact with the outside world when the blade body 314 is in the accommodating space 312. The contact with air thereby slows down the oxidation and rust of the blade body 314 .

2. It can make the blade sharp: The two sharpening structures 321 respectively contact the two inclined surfaces 3151 on the blade part 315. When the sliding operating block 313 pushes the blade body 314 to move, the two inclined surfaces 3151 on the blade part 315 rub against the two sharpening structures 321 respectively. , so that the two sharpening structures 321 grind the two inclined surfaces 3151 to make the tip of the blade portion 315 sharp.

3. Avoid waste of resources: Continuing from the above, by slowing down the speed of oxidation and rust and automatically performing the grinding effect, the service life of the blade body 314 can be extended. Not only that, the sharpening structure 321 can be a grinder that rotates relative to the housing 311. The stone disk makes the worn part of the two sharpening structures 321 more even. The surface of the two sharpening structures 321 will only be evenly worn and will not be prone to deformation, thereby increasing the service life of the two sharpening structures 321. , therefore the waste of the blade body 314 and the sharpening structure 321 can be avoided.

To sum up, the knife unit 31 is provided with the sharpening structure 321, which can push the blade body 314 when the sliding operating block 313 moves and automatically sharpen the blade portion 315, thereby extending the blade body 314. To extend the service life, the sharpening structure 321 can not only use a grindstone fixed in the housing 311, but also a grindstone disc pivoted in the housing 311. The sliding operating block 313 can rotate the grindstone when it moves. The blade structure 321 can make the wear of the sharpening structure 321 more even, thereby making the blade portion 315 sharper, and also extending the service life of the sharpening structure 321, so the purpose of the present invention can indeed be achieved.

However, the above are only two preferred embodiments of the present invention, and should not be used to limit the scope of the present invention. That is, any simple equivalent changes made in accordance with the patent scope of the present invention and the description of the new model are as follows: Modifications are still within the scope of this new patent.

3: Cutting tool 31:Tool unit 311: Shell 312: Accommodation space 313:Sliding operation block 314:Blade body 315:Blade part 3151: Incline 316:Blade opening 317: Slider opening 318:Folding Knife Department 32: Sharpening unit 321: Sharpening structure 322:Gear 323: Transmission belt 324: Backstop structure 3241:Internal gear parts 3242: Elastic support piece 325:Training wheel

Figure 1 is a schematic three-dimensional view, which is a first preferred embodiment of a cutting tool of the present invention; Figure 2 is a schematic three-dimensional view illustrating the three-dimensional appearance of a blade body extending out of the cutting tool in the first preferred embodiment; Figure 3 is a schematic cross-sectional view illustrating the manner in which the blade portion on the blade body abuts the two sharpening structures in the first preferred embodiment; Figure 4 is a schematic cross-sectional view, which is a second preferred embodiment of a cutting tool of the present invention, illustrating the manner in which the blade portion on the blade body abuts the two sharpening structures; and Figure 5 is a side view illustrating that in the second preferred embodiment, a sliding operating block drives a transmission belt to rotate a gear, and a backstop structure controls the rotation direction of a sharpening structure.

3: Cutting tool

31:Tool unit

311: Shell

312: Accommodation space

313:Sliding operation block

314:Blade body

315:Blade part

3151: Incline

32: Sharpening unit

321: Sharpening structure

Claims (10)

A cutting tool containing: A tool unit includes a housing, an accommodating space defined by the housing, a sliding operating block provided in the housing, and a blade body provided in the accommodating space and connected to the sliding operating block, and a blade portion provided on the blade body, the sliding operating block moves relative to the housing and drives the blade body to move; A sharpening unit includes a sharpening structure disposed in the accommodation space and in contact with the blade portion, wherein the sliding operating block is disposed on the upper side of the blade body, and the sharpening structure is disposed on the lower side of the blade body . The cutting tool according to claim 1, wherein the sharpening structure is a grinding stone fixed to the housing. The cutting tool according to claim 1, wherein the sharpening structure is a grindstone disc pivotally connected to the housing, and the sharpening structure rotates relative to the housing. The cutting tool of claim 3, wherein the sharpening unit further includes a gear fixed to the sharpening structure, and a transmission belt fixed to the sliding operating block, the transmission belt and the gear are toothed with each other, and the When the sliding operating block moves relative to the housing, it drives the sharpening structure to rotate relative to the housing. The cutting tool of claim 4, wherein the grinding unit further includes a backstop structure disposed between the gear and the grinding structure, the backstop structure is used to limit the rotation direction of the grinding structure. The cutting tool according to claim 5, wherein the backstop structure has an internal tooth member provided on the gear, and an elastic support member provided on the grinding structure, and the elastic support member elastically supports the inner tooth. Gear parts. The cutting tool according to claim 1, wherein the sharpening unit further includes another sharpening structure, the tool unit further includes two corresponding inclined surfaces provided on the blade portion, and the two sharpening structures respectively contact the edges on the blade portion. Two bevels. The cutting tool of claim 1, wherein the tool unit further includes a blade opening provided in the housing, and the blade opening allows the blade body to protrude outward from the accommodation space. The cutting tool according to claim 1, wherein the tool unit further includes a slider opening provided in the housing, the slider opening allows the sliding operating block to extend outward from the accommodation space, and the sliding operating block Movably disposed in the slider opening. The cutting tool of claim 1, wherein the tool unit further includes a folding knife portion detachably connected to the housing.