A utility knife

Abstract

This application discloses a utility knife, including a housing and a blade. The blade is slidably extended or retracted relative to the housing. Multiple break lines are provided on the blade to divide it into multiple foldable units. A tail cap is connected to the housing. The tail cap has a folding notch adapted to the foldable units. A folding button is installed on the tail cap. The foldable units are inserted into the tail cap through the folding notch. The folding button can float up and down along the vertical direction of the blade. The folding button is used to press the foldable units inside the tail cap, thereby detaching the foldable units from the blade. Through the folding notch and folding button on the tail cap, the foldable units of the blade can be quickly broken, improving the tool's convenience.

Description

Technical Field

[0001] This application relates to the field of cutting tools, and more specifically to a utility knife. Background Technology

[0002] Utility knives, widely used in handicrafts, painting, design, architectural decoration, and electronics repair, offer effective tool support for precision cutting tasks due to their compact blade, replaceable blades, and easy-to-grip handle design. Traditional utility knives typically consist of a handle and a blade. The handle has a groove through which the blade extends or retracts, exposing the edge during use and concealing it within the handle when not in use, thus improving safety by minimizing blade exposure. However, with increased use, the tip of the blade gradually dulls, affecting cutting performance. Traditional blades are usually a single piece, requiring replacement once dulled, increasing costs and wasting blades. The current solution innovates on the traditional blade design by dividing the blade into multiple segments, each separated by a pre-defined break line. When the tip of the blade dulls, the user can break it off along the break line, exposing a new, sharp section for continued use. For example, Chinese utility model patent CN222570836U discloses a utility knife, including a utility knife body with a folding groove and a slot. The folding groove is located on one side of the utility knife body. This groove allows for the insertion of other utility knife blades for breaking. Users can easily break off the blunt end of the blade, exposing a new sharp part, thus extending the blade's lifespan and eliminating the need for a dedicated folding tool, improving folding efficiency. However, in actual folding, a gap exists between the blade and the folding groove, potentially causing instability during the breaking process. Since the blade is not fixed in the groove, it may fly out due to external force during breaking, posing a risk of injury. Furthermore, the utility knife body is a one-piece structure, making it difficult to remove broken blades left in the folding groove. These blades can easily fly out and injure users during subsequent use, and also affect the breaking of subsequent blades. Summary of the Invention

[0003] The technical problem to be solved by this application is to provide a utility knife in which the foldable blade unit is quickly broken through the folding edge and folding button on the end cap, thereby improving the convenience of the tool.

[0004] This application provides a utility knife, including a housing and a blade. The blade is slidably extended or retracted relative to the housing. The blade has multiple break lines that divide it into multiple foldable units. The housing is connected to a tail cap, which has a folding notch adapted to the foldable units. A folding button is installed on the tail cap. The foldable units are inserted into the tail cap through the folding notch. The folding button can float up and down along the vertical direction of the blade and is used to press the foldable units inside the tail cap to disconnect them from the blade.

[0005] In this technical solution, the blade's extension length can be adjusted by sliding, increasing its flexibility. A break line is provided on the blade, allowing users to replace the dull blade with a new, sharper part by breaking it off, reducing the need for frequent replacement of the entire blade and lowering operating costs. A folding edge is provided on the end cap, offering a dedicated folding area for safer and more convenient operation. The folding button can float up and down along the blade's vertical direction to press or release the foldable unit. The foldable unit is inserted into the end cap through the folding edge. The folding button presses down on the inserted foldable unit, detaching it from the blade. The button's design ensures stability during the folding process, preventing the blade from shaking or flying out during breakage. The detachable end cap allows for safe disposal of the broken foldable unit, and the folding edge is easier to maintain, improving the tool's overall convenience.

[0006] As an improvement, the tail cap is provided with a blocking part adapted to the folding blade edge, which is used to limit the insertion length of the foldable unit. In this technical solution, the depth of the blocking part within the folding blade edge is adapted to the length of the foldable unit, ensuring that the length of the foldable unit inserted each time is consistent. Through the depth adaptation design, each folding operation can accurately break one foldable unit, avoiding breaking multiple foldable units or incomplete breaking, thus improving the reliability and consistency of blade replacement.

[0007] As an improvement, the tail of the housing is provided with a buckle, and the tail cover is provided with a buckle groove that matches the buckle. The buckle and the buckle groove are elastically connected to enable a detachable and lockable connection between the housing and the tail cover. In this technical solution, the housing or tail cover is made of a plastic material, which has good elasticity, flexibility, and a certain strength. Utilizing the elastic properties of the plastic material, an elastic connection between the buckle and the buckle groove is achieved, thereby realizing the locking and unlocking functions. Through the cooperation of the buckle and the buckle groove, the tail cover can be firmly locked onto the housing, preventing the tail cover from loosening or falling off during use. Users can easily remove the tail cover from the housing by simply pressing the buckle, facilitating cleaning or other maintenance operations.

[0008] As an improvement, the folding knife button is equipped with a clamping part, the projection surface of which in the horizontal direction coincides with the projection surface of the folding knife edge in the horizontal direction. In this technical solution, the projection surface of the clamping part in the horizontal direction completely coincides with the projection surface of the folding knife edge in the horizontal direction, ensuring that the clamping part can accurately act on the foldable unit inserted into the folding knife edge. Driven by the folding knife button, the clamping part applies pressure to the foldable unit inserted into the tail cap, ensuring that the blade is stably fixed during the breaking process, causing the foldable unit to separate from the blade body, thus completing the folding knife operation. The design of the clamping part ensures that the blade is firmly fixed during the breaking process, reducing the risk of the blade flying out and injuring people.

[0009] As an improvement, the tail cap is provided with a receiving groove adapted to the clamping part. The receiving groove communicates with the folding blade opening, so that the clamping part can press the foldable unit inserted into the folding blade opening. In this technical solution, the clamping part disengages from the receiving groove and enters the folding blade opening under the drive of the folding blade button. The clamping part applies pressure to the foldable unit inserted into the folding blade opening. The clamping part cooperates with the folding blade opening to ensure that the blade is stably fixed in the folding blade opening during the breaking process, reducing the risk of the blade shaking or flying out during the breaking process.

[0010] As an improvement, the tail cap is provided with a through hole adapted to the folding knife button, and the top of the folding knife button protrudes through the through hole for pressing operation. In this technical solution, the top of the folding knife button protrudes outside the tail cap through the through hole, allowing the user to easily find and press the button without complicated operating steps. When pressing the folding knife button, the user does not need to directly contact the blade, reducing the risk of accidental injury.

[0011] As an improvement, the tail cap is provided with a support structure adapted to the folding knife button. At least two support structures are provided to mount and support the folding knife button. In this technical solution, multiple support structures ensure the stability of the folding knife button's position within the tail cap, reducing button wobbling during operation and improving operational accuracy and reliability. The design of the support structures creates a large gap between the folding knife button and the inner wall of the tail cap, providing space for the button's elastic deformation. The folding knife button can undergo a certain degree of elastic deformation during pressing without being restricted by the inner wall of the tail cap. The folding knife button is made of a plastic material, possessing inherent elasticity, allowing it to undergo elastic deformation during pressing and return to its original shape after pressure is released, thereby enabling the pressing and releasing of the foldable unit.

[0012] As an improvement, the tail cap is equipped with a reset elastic element adapted to the folding knife button. The reset elastic element is used to allow the folding knife button to float and reset. In this technical solution, the reset elastic element is used to enable the folding knife button to automatically reset to its initial position after being pressed. The reset elastic element is usually a spring, which can provide a restoring force after the folding knife button is pressed, thereby realizing the pressing and releasing of the foldable unit.

[0013] As an improvement, the inner wall of the tail cap is provided with reinforcing ribs adapted to the through hole. In this technical solution, the reinforcing ribs are used to enhance the mechanical strength around the through hole, ensure the stability of the folding knife button during pressing, reduce the deformation of the inner wall of the tail cap during pressing, improve the stability and reliability of operation, and can also evenly distribute the force generated when the folding knife button is pressed, ensuring that the button is subjected to uniform force during pressing and avoiding damage to the button due to excessive local force.

[0014] As an improvement, the folding knife button is equipped with a stepped structure adapted to the reinforcing rib. The stepped structure abuts against the reinforcing rib to limit the extension height of the folding knife button. In this technical solution, the abutting design of the stepped structure and the reinforcing rib ensures that the folding knife button will not extend excessively during pressing and releasing, and remains in an appropriate position. The limiting design reduces the shaking of the button during operation, ensures the stability of the button's position within the tail cap, and improves the accuracy of operation.

[0015] As an improvement, the folding knife button is a one-piece structure. In this technical solution, the folding knife button adopts a one-piece structure, that is, all functional components of the button (such as the pressing part, the stepped structure, etc.) are formed into a whole with the main body in the manufacturing process, without the need for additional assembly steps, reducing the complexity and cost of the production process. Moreover, the one-piece structure usually has high mechanical strength and stability, reducing the shaking caused by structural loosening or splicing points.

[0016] As an improvement, a blade holder is installed inside the housing, and the blade is installed within the blade holder. A blade support is slidably mounted on the blade holder, and the blade is connected to the blade support. A push button is installed on the blade support, which is used to drive the blade to slide out or retract relative to the housing. In this technical solution, the user can easily control the extension and retraction of the blade by simply pushing the push button, without complicated operating steps. The blade is installed in the blade holder, and its extension and retraction are achieved by the sliding of the blade support, ensuring the stability of the blade during use. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a utility knife according to this application.

[0018] Figure 2 This is a schematic diagram of the exploded structure of a utility knife according to this application.

[0019] Figure 3 This is a three-dimensional structural diagram of the folding knife button in this application.

[0020] Figure 4 This is a three-dimensional structural diagram of the tail cap in this application.

[0021] Figure 5 This is a cross-sectional view of the tail cover in this application.

[0022] The figure shows: 1. Housing; 11. Buckle; 2. Blade; 21. Break line; 22. Foldable unit; 3. Tail cap; 31. Folding blade edge; 32. Buckle groove; 33. Receiving groove; 34. Through hole; 35. Support structure; 36. Reinforcing rib; 37. Blocking part; 4. Folding knife button; 41. Pressing part; 42. Stepped structure; 5. Knife clip; 6. Blade holder; 7. Push button. 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," "including," "having," "containing," and "including," 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. The terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (the specific types and constructions may be the same or different), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0026] Furthermore, it should be noted that the terms "installation," "setting," "equipped with," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components; they can refer to a direct installation on another component or the possible presence of another intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] like Figures 1 to 5 As shown, this application discloses a utility knife, including a housing 1 and a blade 2. The blade 2 is slidably extended or retracted relative to the housing 1. Multiple break lines 21 are provided on the blade 2 to divide it into multiple foldable units 22. A tail cap 3 is connected to the housing 1. The tail cap 3 has a folding edge 31 adapted to the foldable units 22. A folding button 4 is installed on the tail cap 3. The foldable units 22 are inserted into the tail cap 3 through the folding edge 31. The folding button 4 can float up and down along the vertical direction of the blade 2, pressing the foldable units 22 inside the tail cap 3 to disconnect them from the blade 2. The blade 2's extension length can be adjusted by sliding, increasing its flexibility of use. The break lines 21 on the blade 2 allow the user to... After blade 2 becomes dull, it can be replaced with a new sharp part by breaking it off. Users do not need to frequently replace the entire blade 2, reducing usage costs. The tail cap 3 has a folding notch 31, providing a dedicated folding area, making folding knife operation safer and more convenient. The folding button 4 can float up and down along the vertical direction of blade 2 to press or release the foldable unit 22. The foldable unit 22 is inserted into the tail cap 3 through the folding notch 31. The folding button 4 is pressed to press the foldable unit 22 inserted into the tail cap 3, causing it to disconnect from blade 2. The design of the folding button 4 ensures the stability of the folding process and prevents blade 2 from shaking or flying out during the breaking process. The detachable design of the tail cap 3 allows the broken foldable unit 22 to be safely disposed of. The maintenance of the folding notch 31 is more convenient, improving the tool's usability.

[0028] More specifically, the tail cap 3 is provided with a blocking part 37 that is adapted to the folding blade opening 31. The blocking part 37 is used to limit the insertion length of the foldable unit 22. The depth of the blocking part 37 in the folding blade opening 31 is adapted to the length of the foldable unit 22, ensuring that the length of the foldable unit 22 inserted each time is consistent. Through the depth adaptation design, each folding blade operation can accurately break one foldable unit 22, avoiding breaking multiple foldable units 22 or incomplete breaking, thus improving the reliability and consistency of blade 2 replacement.

[0029] More specifically, such as Figure 2 As shown, the tail of the housing 1 is provided with a buckle 11, and the tail cover 3 is provided with a buckle groove 32 that is adapted to the buckle 11. The buckle 11 and the buckle groove 32 are elastically connected to enable the housing 1 and the tail cover 3 to be detachably connected and locked. The housing 1 or the tail cover 3 is made of plastic material, which has good elasticity, flexibility and a certain strength. By utilizing the elastic properties of the plastic material, the elastic connection between the buckle 11 and the buckle groove 32 is realized, thereby realizing the locking and unlocking functions. Through the cooperation of the buckle 11 and the buckle groove 32, the tail cover 3 can be firmly locked on the housing 1 to prevent the tail cover 3 from loosening or falling off during use. Users can easily remove the tail cover 3 from the housing 1 by simply pressing the buckle 11, which is convenient for cleaning the tail cover 3 or performing other maintenance operations.

[0030] More specifically, such as Figures 3 to 5 As shown, the folding knife button 4 is provided with a pressing part 41. The projection surface of the pressing part 41 in the horizontal direction coincides with the projection surface of the folding knife edge 31 in the horizontal direction, ensuring that the pressing part 41 can accurately act on the foldable unit 22 inserted into the folding knife edge 31. Under the drive of the folding knife button 4, the pressing part 41 applies pressure to the foldable unit 22 inserted into the tail cap 3, ensuring that the blade 2 is stably fixed during the breaking process, so that the foldable unit 22 is separated from the blade 2 body, and the folding knife operation is completed. The design of the pressing part 41 ensures that the blade 2 is firmly fixed during the breaking process, reducing the risk of the blade 2 flying out and injuring people.

[0031] More specifically, such as Figures 3 to 5 As shown, the tail cap 3 is provided with a receiving groove 33 that is adapted to the pressing part 41. The receiving groove 33 is connected to the folding blade opening 31 so that the pressing part 41 can press the foldable unit 22 inserted into the folding blade opening 31. Under the drive of the folding blade button 4, the pressing part 41 disengages from the receiving groove 33 and enters the folding blade opening 31. The pressing part 41 applies pressure to the foldable unit 22 inserted into the folding blade opening 31. The pressing part 41 cooperates with the folding blade opening 31 to ensure that the blade 2 is stably fixed in the folding blade opening 31 during the breaking process, reducing the risk of the blade 2 shaking or flying out during the breaking process.

[0032] More specifically, such as Figures 3 to 5As shown, the tail cap 3 has a through hole 34 that is adapted to the folding knife button 4. The top of the folding knife button 4 extends through the through hole 34 for pressing operation. The top of the folding knife button 4 extends outside the tail cap 3 through the through hole 34, so that the user can easily find and press the button without complicated operation steps. When the user presses the folding knife button 4, there is no need to directly contact the blade 2, which reduces the risk of accidental injury.

[0033] More specifically, such as Figures 3 to 5 As shown, the tail cap 3 has a support structure 35 adapted to the folding knife button 4. There are at least two support structures 35. The support structures 35 are used to install and support the folding knife button 4. Multiple support structures 35 ensure that the folding knife button 4 is stable in the tail cap 3, reducing the shaking of the button during operation and improving the accuracy and reliability of operation. The design of the support structure 35 makes there a large gap between the folding knife button 4 and the inner wall of the tail cap 3, providing space for the elastic deformation of the folding knife button 4. The folding knife button 4 can undergo a certain elastic deformation during the pressing process without being restricted by the inner wall of the tail cap 3. The folding knife button 4 is made of plastic material and has a certain elasticity. It can undergo elastic deformation during the pressing process and return to its original shape after the pressure is released, thereby realizing the pressing and releasing of the foldable unit 22.

[0034] More specifically, this embodiment provides an elastic reset structure that differs from the support structure 35. The tail cap 3 is provided with a reset elastic element adapted to the folding knife button 4. The reset elastic element is used to enable the folding knife button 4 to automatically reset and return to its initial position after being pressed. The reset elastic element is usually a spring, which can provide a restoring force after the folding knife button 4 is pressed, thereby realizing the pressing and releasing of the foldable unit 22.

[0035] More specifically, such as Figures 3 to 5 As shown, the inner wall of the tail cap 3 is provided with a reinforcing rib 36 that matches the through hole 34. The reinforcing rib 36 is used to enhance the mechanical strength around the through hole 34, ensure the stability of the folding knife button 4 during the pressing operation, reduce the deformation of the inner wall of the tail cap 3 during the pressing operation, improve the stability and reliability of the operation, and can also evenly distribute the force generated when the folding knife button 4 is pressed, ensuring that the button is subjected to uniform force during the pressing process, and avoiding damage to the button due to excessive local force.

[0036] More specifically, such as Figures 3 to 5 As shown, the folding knife button 4 has a stepped structure 42 that matches the reinforcing rib 36. The stepped structure 42 abuts against the reinforcing rib 36 to limit the extension height of the folding knife button 4. The abutting design between the stepped structure 42 and the reinforcing rib 36 ensures that the folding knife button 4 will not extend excessively during pressing and releasing, and will remain in an appropriate position. The limiting design reduces the shaking of the button during operation, ensures the stability of the button's position within the tail cap 3, and improves the accuracy of operation.

[0037] More specifically, such as Figure 3 As shown, the folding knife button 4 is an integrated structure. The folding knife button 4 adopts an integrated structure, that is, all the functional parts of the button (such as the pressing part 41, the stepped structure 42, etc.) are formed together with the main body in one step during the manufacturing process, forming a whole. No additional assembly steps are required, which reduces the complexity and cost of the production process. In addition, the integrated structure usually has high mechanical strength and stability, reducing the shaking caused by structural loosening or splicing points.

[0038] More specifically, such as Figure 1 As shown, a blade holder 5 is installed inside the housing 1, and the blade 2 is installed inside the blade holder 5. A blade support 6 is slidably installed on the blade holder 5, and the blade 2 is connected to the blade support 6. A push button 7 is installed on the blade support 6. The push button 7 is used to drive the blade 2 to slide out or retract relative to the housing 1. The user can easily control the extension and retraction of the blade 2 by simply pushing the push button 7 without complicated operation steps. The blade 2 is installed inside the blade holder 5, and its extension and retraction are achieved by sliding the blade support 6, ensuring the stability of the blade 2 during use.

[0039] This application is not limited to the above-described preferred embodiments. Anyone can derive other products in various forms under the guidance of this application. However, regardless of any changes made to their shape or structure, any technical solution that is the same as or similar to that of this application falls within the protection scope of this application.

Claims

1. A utility knife, comprising a housing (1) and a blade (2), wherein the blade (2) is slidably extended or retracted relative to the housing (1), and wherein the blade (2) is provided with a plurality of break lines (21) for dividing the blade (2) into a plurality of foldable units (22), characterized in that, The housing (1) is connected to a tail cap (3). The tail cap (3) is provided with a folding blade (31) adapted to the foldable unit (22). A folding button (4) is installed on the tail cap (3). The foldable unit (22) is inserted into the tail cap (3) through the folding blade (31). The folding button (4) can float up and down along the vertical direction of the blade (2). The folding button (4) is used to press the foldable unit (22) in the tail cap (3) so that the foldable unit (22) inserted in the tail cap (3) is disconnected from the blade (2).

2. A utility knife according to claim 1, characterized in that, The tail cap (3) is provided with a blocking part (37) adapted to the folding blade (31), the blocking part (37) being used to limit the insertion length of the foldable unit (22).

3. A utility knife according to claim 1, characterized in that, The tail of the housing (1) is provided with a buckle (11), and the tail cover (3) is provided with a buckle groove (32) that is adapted to the buckle (11). The buckle (11) and the buckle groove (32) are elastically connected so that the housing (1) and the tail cover (3) are detachably connected and locked.

4. A utility knife according to claim 1, characterized in that, The folding knife button (4) is provided with a pressing part (41), and the projection surface of the pressing part (41) in the horizontal direction coincides with the projection surface of the folding knife edge (31) in the horizontal direction.

5. A utility knife according to claim 4, characterized in that, The tail cap (3) is provided with a receiving groove (33) that is adapted to the pressing part (41). The receiving groove (33) is connected to the folding blade (31) so that the pressing part (41) can press the foldable unit (22) inserted into the folding blade (31).

6. A utility knife according to claim 1, characterized in that, The tail cap (3) is provided with a through hole (34) adapted to the folding knife button (4), and the top of the folding knife button (4) extends through the through hole (34) for pressing operation.

7. A utility knife according to claim 6, characterized in that, The tail cap (3) is provided with a support structure (35) adapted to the folding knife button (4). There are at least two support structures (35), which are used to install and support the folding knife button (4).

8. A utility knife according to claim 6, characterized in that, The tail cap (3) is provided with a reset elastic element that is adapted to the folding knife button (4). The reset elastic element is used to make the folding knife button (4) float and reset.

9. A utility knife according to claim 6, characterized in that, The inner wall of the tail cap (3) is provided with reinforcing ribs (36) that are adapted to the through hole (34).

10. A utility knife according to claim 9, characterized in that, The folding knife button (4) is provided with a stepped structure (42) adapted to the reinforcing rib (36). The stepped structure (42) abuts against the reinforcing rib (36) to limit the extension height of the folding knife button (4).

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