A type of anti-shake utility knife

Abstract

This utility model provides a wobbly utility knife, including a blade shell, a blade clip, a blade holder, a blade, and a button. The blade clip is disposed inside the blade shell, and both the blade and the button are connected to the blade holder. The blade holder is slidably connected to the blade clip. The button is used to push the blade holder to slide along the blade clip, causing the blade to extend or retract into the blade shell. The front end of the blade clip has a spaced-apart anti-wobbly block and an anti-wobbly block engaging structure. When the blade extends out of the blade shell, it is positioned between the anti-wobbly block and the engaging structure. The anti-wobbly block is slidably connected to the blade clip. The anti-wobbly block slides on the blade clip and engages with the engaging structure to press and lock the blade, or unlock it. The distance between the anti-wobbly block and the engaging structure is smaller when the blade is locked than when it is unlocked. In use, the anti-wobbly utility knife of this utility model allows the anti-wobbly block to be pushed to press and lock the blade, thus preventing blade wobbling and improving user comfort.

Description

Technical Field

[0001] This utility model relates to the technical field of stationery, and more specifically to a shaky utility knife. Background Technology

[0002] Utility knives are common knives frequently used in art and handicrafts, and also in everyday life for tasks such as sharpening pencils, cutting tape, and unpacking packages. Current utility knives typically consist of a casing and a blade. The blade extends and retracts within the casing; it is pushed out during use and retracted afterward. However, with current utility knives, the thin blade tends to wobble significantly when extended, resulting in large gaps when cutting. This is particularly detrimental to delicate tasks and severely impacts user comfort. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a wobbly utility knife with a simple structure that can prevent the blade from wobbling when it extends out of the blade shell.

[0004] The technical solution of this utility model is to provide an anti-wobbling utility knife, including a knife shell, a knife clip, a blade holder, a blade, and a button. The knife clip is disposed inside the knife shell, and both the blade and the button are connected to the blade holder. The blade holder is slidably connected to the knife clip. The button is used to push the blade holder to slide along the knife clip, causing the blade to extend or retract into the knife shell. The front end of the knife clip is provided with an anti-wobbling block and an anti-wobbling block engaging structure that are spaced apart and opposite each other. When the blade extends out of the knife shell, it is located between the anti-wobbling block and the anti-wobbling block engaging structure. The anti-wobbling block is slidably connected to the knife clip. The anti-wobbling block slides on the knife clip and can engage with the anti-wobbling block engaging structure to press against and press against the blade to lock or unlock the blade. The distance between the anti-wobbling block and the anti-wobbling block engaging structure is smaller when the blade is locked than when the blade is unlocked.

[0005] Compared with the prior art, the anti-shaking utility knife of this utility model has the following advantages: When using the anti-shaking utility knife of this utility model, first push the button to push the blade out of the blade shell, and then push the anti-shaking block to press against the blade. This can prevent the blade from shaking. The blade will not move when cutting objects. It can also be operated stably in fine work, improving the comfort of use. The overall structure is simple and the anti-shaking effect is good.

[0006] Preferably, the anti-sway block includes a pushing part, a connecting part, and a clamping piece. A groove is provided on one side of the blade clamp, and the clamping piece is embedded in the groove and can slide along the groove to press and hold the blade. The connecting part is limited to the outside of the groove to connect the pushing part and the clamping piece. The pushing part is located outside the blade housing to push the anti-sway block to slide. This structure is simple and easy to assemble, facilitating both the sliding of the anti-sway block and the pressing and holding of the blade.

[0007] Preferably, a protrusion is provided on the side of the clamping plate opposite to the anti-sway block mating structure. The protrusion is used to engage with the anti-sway block mating structure to press and hold the blade. With this structure, the protrusion engaging with the anti-sway block mating structure to press and hold the blade reduces the contact area between the clamping plate and the blade, thus reducing the friction between them. This reduces the resistance to pushing the anti-sway block, allowing the anti-sway block to be easily pushed before and after pressing and holding the blade.

[0008] Preferably, a first inclined surface and a second inclined surface are respectively provided on the left and right sides of the protrusion. Both the first and second inclined surfaces are inclined from the side that contacts the protrusion away from the anti-sway block mating structure. This structure, with its first and second inclined surfaces, facilitates the placement of the protrusion and ensures that the clamping point that contacts and presses against the blade is located in the middle of the clamping plate. This helps to ensure uniform force distribution on the clamping plate and avoids excessive force on the ends of the clamping plate, preventing fatigue damage.

[0009] Preferably, the blade holder is slidably connected to the slide groove. A toothed rack is provided on one side wall of the slide groove. Two limiting plates are provided inside the blade holder, with the ends of both limiting plates being limited between the teeth of the toothed rack. Both limiting plates are elastic, capable of elastic deformation and sliding along the toothed rack. This structure is simple. The elastic deformation of the limiting plates along the toothed rack allows the blade holder to slide along the blade holder, thereby extending or retracting the blade from the blade housing. The ends of the limiting plates abut against the teeth of the toothed rack, limiting the blade holder and preventing the blade from extending or retracting during use.

[0010] Preferably, the blade holder is provided with a spring sheet, which has two relief curved surfaces. The two relief curved surfaces cover the ends of the two limiting plates and are both limited between the teeth of the toothed rack. The spring sheet can elastically deform with the limiting plates and slide along the toothed rack. With this structure, the relief curved surfaces of the spring sheet cover the ends of the limiting plates, protecting the ends of the limiting plates and preventing fatigue damage during contact with the teeth of the toothed rack or during sliding along the toothed rack. The relief curved surfaces also reduce the processing requirements for the ends of the limiting plates. Only the relief curved surfaces need to be processed to adapt to the shape between the teeth of the toothed rack and facilitate sliding along the toothed rack. The relief curved surfaces of the spring sheet can be formed by stamping, which is much more convenient than the injection molding required for the limiting plates of the blade holder.

[0011] Preferably, both limiting pieces are provided with limiting protrusions. The limiting protrusions are used to limit the spring piece on one side, and the button limits the spring piece on the other side. This structure facilitates the assembly of the spring piece; in addition, the spring piece is actually undergoing repeated elastic deformation and rebound during the sliding process along the toothed rack. Limiting the spring piece on both sides can prevent the spring piece from shifting during the repeated elastic deformation and rebound process.

[0012] Preferably, an insertion groove is provided between the two limiting pieces, and a connecting post is provided on the button. The connecting post is inserted into the insertion groove and can move back and forth along the insertion groove. When the button pushes the blade holder to slide along the blade holder, the connecting post is used to push one of the limiting pieces to undergo elastic deformation, thereby disengaging it from the teeth of the retaining rack. The other limiting piece can undergo elastic deformation under the resistance of the retaining rack and slide along the retaining rack. This structure facilitates the assembly of the button and the blade holder, and also facilitates the elastic deformation of the limiting pieces during the process of pushing the blade out or retracting the blade housing.

[0013] Preferably, the connecting post is provided with a hook, which engages with the end face of one side wall of the insertion slot for a snap-fit ​​connection. This structure facilitates the assembly of the button and blade holder, preventing the button and blade holder from separating.

[0014] Preferably, the anti-sway block mating structure is a transition slope. The anti-sway block slides towards the front end of the tool holder to engage with the transition slope and press against the blade. The anti-sway block slides in the opposite direction to engage with the transition slope and unlock the blade. This structure is simple, easy to manufacture, and convenient to assemble with the anti-sway block. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the anti-shake utility knife of this utility model.

[0016] Figure 2 for Figure 1 Exploded view.

[0017] Figure 3 This is a schematic diagram of the internal structure of the anti-shake utility knife of this utility model.

[0018] Figure 4 This is a schematic diagram of the anti-shake block in the anti-shake utility knife of this utility model.

[0019] Figure 5 for Figure 3 A sectional view along the AA direction.

[0020] Figure 6 This is a schematic diagram of the assembly structure of the blade holder and spring in the anti-shake utility knife of this utility model.

[0021] Figure 7 This is a schematic diagram of the button structure in the anti-shake utility knife of this utility model.

[0022] As shown in the figure: 1. Button, 1-1. Connecting post, 1-2. Retractor, 2. Spring, 2-1. Avoidance surface, 3. Blade holder, 3-1. Insertion groove, 3-2. Limiting piece, 3-3. Limiting protrusion, 3-4. Blade connecting post, 4. Blade clip, 4-1. Gear rack, 4-2. Transition slope, 4-3. Blade abutting surface, 4-4. Slide groove, 5. Blade housing, 6. Tail cover, 7. Anti-sway block, 7-1. Pushing part, 7-2. Connecting part, 7-3. Clamping piece, 7-4. First inclined surface, 7-5. Protrusion, 7-6. Second inclined surface, 8. Blade. Detailed Implementation

[0023] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0024] In the accompanying drawings, the thickness, size, and shape of the objects have been slightly exaggerated for illustrative purposes. The drawings are for illustrative purposes only and are not drawn to scale.

[0025] It should also be understood that the terms "comprising," "having," "including," and "containing," when used in this specification, indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof. Furthermore, when expressions such as "...at least one" appear after a list of listed features, they modify the entire listed feature, not individual elements in the list.

[0026] like Figures 1 to 3 As shown, the anti-shake utility knife of this utility model includes a blade shell 5, a tail cap 6, a blade clip 4, a blade holder 3, a blade 8, a button 1, and an anti-shake block 7. The rear end of the blade shell 5 has an opening for the blade clip 4 to be inserted into it. The blade clip 4 is inserted into the blade shell 5 through the opening, and then the opening is closed by the tail cap 6. A sliding groove 4-4 is provided on one side of the blade clip 4, and the anti-shake block 7 and the blade holder 3 are slidably connected to the sliding groove 4-4. The blade 8 and the button 1 are both connected to the blade holder 3. 1 is used to push the blade holder 3 to slide along the blade holder 4 so that the blade 8 extends or retracts into the blade housing 5; the front end of the blade holder 4 is provided with an anti-sway block and a transition slope 4-2. The transition slope 4-2 is inclined so that the opening of the blade holder 4 for the blade 8 to enter and exit the blade housing 5 gradually narrows towards the front end. The anti-sway block 7 is opposite to the transition slope 4-2 in the air. The anti-sway block 7 slides towards the front end of the blade holder 4 and can cooperate with the transition slope 4-2 to press and hold the blade 8, thereby preventing the blade from shaking during use.

[0027] like Figure 4 and Figure 5 As shown, the anti-sway block 7 includes a pushing part 7-1, a connecting part 7-2, and a clamping piece 7-3. The clamping piece 7-3 is embedded in the slide groove 4-4, and the upper and lower bottom surfaces of the clamping piece 7-3 are slidably connected to the two groove walls of the slide groove 4-4, so that the clamping piece 7-3 can slide along the slide groove 4-4. The connecting part 7-2 connects the pushing part 7-1 and the clamping piece 7-3 and is limited to the outside of the slide groove 4-4. The pushing part 7-1 is located outside the blade housing 5 and is used to push the anti-sway block 7 to slide. A protrusion 7-5 is provided on the side of the clamping plate 7-3 opposite to the transition slope 4-2. A first inclined surface 7-4 and a second inclined surface 7-6 are provided on the left and right sides of the protrusion 7-5, respectively. The first inclined surface 7-4 and the second inclined surface 7-6 are both inclined from the side that is in contact with the protrusion 7-5 toward the direction away from the transition slope 4-2. As the anti-sway block 7 slides toward the front end of the blade clamp 4, the protrusion 7-5 and the transition slope 4-2 cooperate to gradually press and abut against the blade 8.

[0028] A toothed rack 4-1 is provided on one side wall of the middle and rear part of the slide groove 4-4, and the blade holder 3 is located in the area where the toothed rack 4-1 is located. Figure 6 and Figure 7 As shown, the blade holder 3 is provided with a blade connecting post 3-4, and the blade 8 is connected to the blade connecting post 3-4. Two limiting pieces 3-2 are provided inside the blade holder 3, with the ends of both limiting pieces 3-2 extending into the teeth of the toothed rack 4-1. Both limiting pieces 3-2 are elastic and can undergo elastic deformation. An insertion groove 3-1 is provided between the two limiting pieces 3-2. A connecting post 1-1 is provided on the button 1, which is inserted into the insertion groove 3-1 and can move back and forth along the groove. A return hook 1-2 is provided on the connecting post 1-1, and the return hook 1-2 intersects with one side of the insertion groove 3-1. The end face of the wall is connected with a snap fastener; the blade bracket 3 is also provided with a spring piece 2, which is provided with two front and rear clearance curved surfaces 2-1. The two clearance curved surfaces 2-1 cover the ends of the two limiting pieces 3-2 respectively and both abut against the teeth of the toothed rack 4-1. The spring piece 2 can undergo elastic deformation with the limiting pieces 3-2; each of the two limiting pieces 3-2 is provided with a limiting protrusion 3-3. The limiting protrusion 3-3 limits the spring piece 2 on one side, and the button 1 limits the spring piece 2 on the other side.

[0029] When button 1 pushes the blade holder 3 to slide towards one end of the blade clamp 4, the connecting column 1-1 pushes the limiting piece 3-2 located on the front side of the movement direction, causing it and the spring piece 2 on it to undergo elastic deformation so that they do not collide with the toothed rack 4-1 or disengage from the teeth of the toothed rack 4-1. The other limiting piece 3-2 located on the rear side of the movement direction and the spring piece 2 on it are subjected to the resistance force of the toothed rack 4-1 on the current toothed rack 4-1 and undergo elastic deformation, thereby disengaging from the teeth of the toothed rack 4-1 and being able to slide along the toothed rack 4-1. In this way, button 1 can push the blade holder 3 to slide along the blade clamp 4. After stopping pushing the blade holder 3, the two limiting pieces 3-2 and the spring pieces 2 on them will collide with the teeth of the toothed rack 4-1 at the corresponding positions, so that the blade holder 3 is limited and the blade 8 is prevented from moving during use.

[0030] As the limiting piece 3-2 located on the rear side of the movement direction and the spring piece 2 on it slide along the toothed rack 4-1, they will repeatedly undergo elastic deformation to disengage from the current tooth space and spring back into the next adjacent tooth space. In fact, it is a process of repeated elastic deformation and springback.

[0031] In other embodiments, the anti-sway block mating structure can also be a protruding structure, such as a protrusion, a protrusion, or an outwardly protruding curved surface, or a stepped surface structure. All of these structures can cooperate with the anti-sway block 7 to lock the blade 8 or unlock the blade 8.

[0032] The above are merely specific embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Any modifications or equivalent substitutions to this utility model without departing from its spirit and scope should be covered within the protection scope of the claims of this utility model.

Claims

1. A kind of anti-shake art knife, including knife shell (5), knife holder (4), blade holder (3), blade (8) and button (1), knife holder (4) is arranged in knife shell (5), blade (8) and button (1) are all connected on blade holder (3), blade holder (3) is slidably connected with knife holder (4), button (1) is used to push blade holder (3) along knife holder (4) sliding and makes blade (8) extend or retract knife shell (5);It is characterized in that, The front end of the blade holder (4) is provided with an anti-sway block (7) and an anti-sway block mating structure that are spaced apart. When the blade (8) extends out of the blade shell (5), it is located between the anti-sway block (7) and the anti-sway block mating structure. The anti-sway block (7) is slidably connected to the blade holder (4). The anti-sway block (7) can slide on the blade holder (4) and cooperate with the anti-sway block mating structure to press against the blade (8) to lock or unlock the blade (8). The distance between the anti-sway block (7) and the anti-sway block mating structure is smaller when the blade (8) is locked than when the blade (8) is unlocked.

2. The anti-roll craft knife of claim 1, wherein, The anti-sway block (7) includes a pushing part (7-1), a connecting part (7-2), and a clamping piece (7-3). A groove (4-4) is provided on one side of the blade clamp (4). The clamping piece (7-3) is embedded in the groove (4-4) and can slide along the groove (4-4) to press against the blade (8). The connecting part (7-2) is limited to the outside of the groove (4-4) to connect the pushing part (7-1) and the clamping piece (7-3). The pushing part (7-1) is located outside the blade housing (5) to push the anti-sway block (7) to slide.

3. The anti-shake utility knife according to claim 2, characterized in that, A protrusion (7-5) is provided on the side of the clamping plate (7-3) opposite to the anti-sway block cooperating structure. The protrusion (7-5) is used to cooperate with the anti-sway block cooperating structure to press and abut against the blade (8).

4. The anti-shake utility knife according to claim 3, characterized in that, The protrusion (7-5) is provided with a first inclined surface (7-4) and a second inclined surface (7-6) on its left and right sides respectively. The first inclined surface (7-4) and the second inclined surface (7-6) are both inclined from the side that is in contact with the protrusion (7-5) toward the direction away from the anti-sway block mating structure.

5. The anti-shake utility knife according to claim 2, characterized in that, The blade holder (3) is slidably connected to the slide groove (4-4). A toothed rack (4-1) is provided on one side wall of the slide groove (4-4). Two limiting pieces (3-2) are provided inside the blade holder (3). The ends of the two limiting pieces (3-2) are limited between the teeth of the toothed rack (4-1). Both limiting pieces (3-2) are elastic and can undergo elastic deformation and slide along the toothed rack (4-1).

6. The anti-shake utility knife according to claim 5, characterized in that, The blade holder (3) is provided with a spring piece (2), and the spring piece (2) is provided with two front and rear clearance surfaces (2-1). The two clearance surfaces (2-1) respectively cover the ends of the two limiting pieces (3-2) and are both limited between the teeth of the toothed rack (4-1). The spring piece (2) can undergo elastic deformation with the limiting piece (3-2) and slide along the toothed rack (4-1).

7. The anti-shake utility knife according to claim 6, characterized in that, Both limiting pieces (3-2) are provided with limiting protrusions (3-3). The limiting protrusions (3-3) are used to limit the spring piece (2) on one side of the spring piece (2), and the button (1) limits the spring piece (2) on the other side of the spring piece (2).

8. The anti-shake utility knife according to claim 5, characterized in that, A slot (3-1) is provided between the two limiting pieces (3-2). A connecting post (1-1) is provided on the button (1). The connecting post (1-1) is inserted into the slot (3-1) and can move back and forth along the slot (3-1). When the button (1) pushes the blade holder (3) to slide along the blade clamp (4), the connecting post (1-1) is used to push one of the limiting pieces (3-2) to undergo elastic deformation and thus exit the toothed space of the rack (4-1). The other limiting piece (3-2) can undergo elastic deformation under the resistance of the rack (4-1) and slide along the rack (4-1).

9. The anti-shake utility knife according to claim 8, characterized in that, The connecting post (1-1) is provided with a hook (1-2), which engages with the end face of one side wall of the insertion groove (3-1) for snap-fit ​​connection.

10. The anti-shake utility knife according to claim 1, characterized in that, The anti-sway block is a transition slope (4-2). The anti-sway block (7) slides towards the front end of the blade holder (4) and can cooperate with the transition slope (4-2) to press against the blade (8). The anti-sway block (7) slides in the opposite direction and can cooperate with the transition slope (4-2) to unlock the blade (8).

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