Art knife

Abstract

The utility model belongs to the technical field of manual tools, and discloses an art knife which comprises a shell, a knife rest, a pushing assembly, a blade and an elastic element. A first port is formed in the side ridge of the shell; a second port is formed in the top; the tool rest is arranged in the shell and provided with a meshing tooth part. The pushing assembly is movably arranged in the tool rest in the first direction and partially extends out of the first through opening. The blade is arranged in the tool rest, is connected to the pushing assembly and can extend out of or retract into the second through opening under driving of the pushing assembly, and the plane where the meshing tooth part is located is perpendicular to the plane where the blade side face is located; the elastic element pushes the assembly to be in limited connection and can be meshed and positioned on the meshing tooth part; the pushing assembly can abut against the elastic element when moving in the first direction so that the elastic element can be disengaged from the meshing tooth part in the second direction. The first direction is parallel to the extension direction of the blade. The second direction is perpendicular to the plane of the blade side. The art knife has left and right hand universality, and the locking reliability of the blade can be improved.

Description

Technical Field

[0001] This utility model relates to the field of hand tools technology, and in particular to a utility knife. Background Technology

[0002] The utility knife has a pull-out design for both the outer casing and the blade, allowing the blade to extend or retract relative to the casing.

[0003] Traditional utility knives are designed with the push button position and width only for right-handed users, making them less user-friendly for left-handed users. Furthermore, the push button is too close to the blade, posing a risk of cuts. Additionally, existing utility knives suffer from insufficient locking reliability.

[0004] Therefore, there is an urgent need for a utility knife to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a utility knife that is ambidextrous and can improve the locking reliability of the blade.

[0006] It also reduces the operating force required for blade extension and retraction, making it easier for users to operate.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] Utility knives, including:

[0009] The outer casing has a first opening on the side ridge and a second opening on the top.

[0010] The tool holder is disposed within the outer casing and is provided with meshing teeth;

[0011] A pushing component is movably disposed in the tool holder along a first direction, forming a pushing groove and partially extending out of the first through-hole;

[0012] The blade is disposed in the blade holder and connected to the push assembly, and can extend or retract into the second port under the drive of the push assembly; the plane where the meshing teeth are located is perpendicular to the plane where the side of the blade is located;

[0013] An elastic element is limitedly connected to the pushing assembly, and the elastic element can engage and be positioned on the meshing teeth; when the pushing assembly moves along a first direction, it can push against the elastic element so that the elastic element can disengage from the meshing teeth along a second direction; the first direction is parallel to the extension direction of the blade, and the second direction is perpendicular to the plane where the side of the blade is located.

[0014] As a preferred embodiment of the utility knife provided by this utility model, the pushing component is provided with a pushing groove, and the elastic element is partially accommodated in the pushing groove. When the pushing component moves along the first direction, the inner wall of the pushing groove can push the elastic element so that the elastic element can disengage from the meshing teeth along the second direction.

[0015] As a preferred embodiment of the utility knife provided by this utility model, the inner wall of the pushing groove forms a first pushing part and a second pushing part, and the first pushing part and the second pushing part are arranged opposite to each other in a first direction;

[0016] The first and second pushing parts can push against the elastic element so that the elastic element can disengage from the meshing teeth in the second direction.

[0017] As a preferred embodiment of the utility knife provided by this utility model, the apex corner where the elastic element contacts the first pushing part has an arc-shaped transition; and / or,

[0018] The apex of the elastic element that contacts the second pushing part has an arc-shaped transition.

[0019] As a preferred embodiment of the utility knife provided by this utility model, the elastic element includes an engaging connection portion and an elastic recovery portion connected to each other, the engaging connection portion being at least partially accommodated in the pushing groove; the engaging connection portion is protruding relative to the elastic recovery portion; the elastic recovery portion is limitedly connected to the pushing component; the first pushing portion and the second pushing portion are capable of pushing the engaging connection portion to disengage from the engaging teeth.

[0020] As a preferred embodiment of the utility knife provided by this utility model, the pushing component is provided with a backing platform, the backing platform and the pushing groove are spaced apart, the elastic recovery part is attached to the backing platform, and the meshing connection part can mesh with the meshing teeth part under the elastic action of the elastic recovery part.

[0021] As a preferred embodiment of the utility knife provided by this utility model, there are two elastic recovery parts, which are respectively disposed on both sides of the meshing connection part, and there are two abutment platforms, which abut against the two abutment platforms respectively.

[0022] As a preferred embodiment of the utility knife provided by this utility model, the pushing component includes a sliding seat and a push button structure. The sliding seat is connected to the push button structure, the pushing groove is formed on the push button structure, and the abutting platform is provided on the side of the sliding seat facing the push button structure.

[0023] As a preferred embodiment of the utility knife provided by this utility model, the sliding seat has an insertion interface, the push button structure includes a push button seat and an insertion boss, the push button seat is slidably disposed in the knife holder, the insertion boss is disposed on the side of the push button seat facing the sliding seat and can be inserted into the insertion interface, and the pushing groove is formed on the side of the insertion boss facing the sliding seat.

[0024] As a preferred embodiment of the utility knife provided by this utility model, the push button structure further includes a push button body, which is connected to the push button seat and can extend out of the outer shell from the first through-hole. The insertion protrusion is provided with a snap-fit ​​protrusion on the side of the push groove near the push button body and / or on the side opposite to the push button body, and the snap-fit ​​protrusion can snap into the insertion interface.

[0025] The beneficial effects of this utility model are:

[0026] The utility knife provided by this utility model includes a shell, a blade holder, a pushing component, a blade, and an elastic element. A first opening is formed on the side ridge of the shell, and a second opening is formed on the top. The blade holder is disposed within the shell and has meshing teeth. The pushing component is movably disposed within the blade holder along a first direction and partially extends out of the first opening. The blade is disposed within the blade holder and connected to the pushing component, and can extend or retract into the second opening under the action of the pushing component. The shell protects the internal components, improves the overall structural integrity of the utility knife, and separates the user's hand from the blade, preventing cuts. Furthermore, by placing the contact point between the user and the pushing component on the side ridge of the shell, it is ambidextrous, making it widely applicable. The elastic element is limited and connected to the push assembly, and can be engaged and positioned at the meshing teeth. The plane of the meshing teeth is perpendicular to the plane of the blade side. When the push assembly moves in the first direction, it can push the elastic element so that the elastic element can disengage from the meshing teeth in the second direction. Through the above arrangement, the contact area between the meshing teeth and the elastic element is increased, the stroke of the elastic element is increased, and the locking state is more stable. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the utility knife provided in this embodiment of the utility model. Figure 1 ;

[0029] Figure 2 This is a schematic diagram of the structure of the utility knife provided in this embodiment of the utility model. Figure 2 ;

[0030] Figure 3 This is a top view of the utility knife provided in this embodiment of the utility model;

[0031] Figure 4 This is a partial structural diagram of the utility knife provided in this embodiment of the utility model. Figure 1 ;

[0032] Figure 5 This is a partial structural diagram of the utility knife provided in this embodiment of the utility model. Figure 2 ;

[0033] Figure 6 This is a partial structural diagram of the utility knife provided in this embodiment of the utility model. Figure 3 ;

[0034] Figure 7 This is a schematic diagram of the structure of the pushing component and the elastic element provided in the embodiment of this utility model;

[0035] Figure 8 This is a schematic diagram of the structure of the sliding seat and elastic element provided in the embodiment of this utility model;

[0036] Figure 9 This is a schematic diagram of the push button structure provided in this embodiment of the utility model;

[0037] Figure 10 This is a partial structural cross-sectional view provided in an embodiment of this utility model;

[0038] Figure 11 yes Figure 10 A magnified view of the structure marked A in the middle.

[0039] In the picture:

[0040] 100. Outer casing; 110. First opening; 120. Second opening; 130. Push button receiving groove;

[0041] 200. Tool holder; 210. Meshing teeth;

[0042] 300. Pushing component; 310. Sliding seat; 311. Abutting platform; 312. Insertion interface; 313. Connecting post; 314. Support part; 320. Push button structure; 321. Pushing groove; 322. First pushing part; 323. Second pushing part; 324. Push button seat; 325. Insertion boss; 326. Push button body; 327. Snap-fit ​​protrusion;

[0043] 400. Blade;

[0044] 500. Elastic element; 510. Engaging connection part; 520. Elastic recovery part;

[0045] 600, breaker; 610, breaker gap. Detailed Implementation

[0046] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0049] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0050] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0051] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connect," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0053] In this embodiment, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0054] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0055] Figure 1 This diagram illustrates the structure of the utility knife provided in this embodiment of the invention. Figure 1 ; Figure 2 This diagram illustrates the structure of the utility knife provided in this embodiment of the invention. Figure 2 ; Figure 3 This is a top view of the utility knife provided in an embodiment of the present invention. Figure 4 This diagram shows a partial structural schematic of the utility knife provided in an embodiment of the present invention; Figure 5 This diagram illustrates a portion of the structure of the utility knife provided in this embodiment of the invention. Figure 2 ; Figure 6 This diagram illustrates a portion of the structure of the utility knife provided in this embodiment of the invention. Figure 3 ; Figure 7A schematic diagram of the pushing assembly and elastic element provided in an embodiment of the present invention is shown. (Refer to...) Figures 1-7 This embodiment provides a utility knife.

[0056] Specifically, the utility knife includes a casing 100, a blade holder 200, a pushing assembly 300, a blade 400, and an elastic element 500. The casing 100 has a first opening 110 on its side ridge and a second opening 120 on its top. The blade holder 200 is disposed within the casing 100, has meshing teeth 210, and forms an internal receiving space. The pushing assembly 300 is movably disposed within the receiving space of the blade holder 200 along a first direction and partially extends out of the first opening 110 for user operation. The blade 400 is disposed within the receiving space of the blade holder 200, connected to the pushing assembly 300, and can extend or retract into the second opening 120 under the action of the pushing assembly 300. The plane containing the meshing teeth 210 is perpendicular to the plane containing the side of the blade 400. Figure 5 As shown. The outer casing 100 protects the internal components, improves the overall structural integrity of the utility knife, and separates the user's hand from the blade 400 to prevent cuts. Furthermore, by placing the contact point between the user and the pushing component 300 on the side ridge of the outer casing 100, it is ambidextrous, making it widely applicable.

[0057] Figure 8 This diagram shows the structure of the sliding seat and elastic element provided in an embodiment of the present invention. Figure 9 This diagram shows a schematic representation of the push button structure provided in an embodiment of the present invention. Figure 10 This diagram shows a partial structural cross-sectional view provided by an embodiment of the present invention. Figure 11 Show Figure 10 A magnified view of the structure marked A in the middle. (Refer to...) Figures 8-11 The pushing component 300 has a pushing groove 321, in which the elastic element 500 is accommodated and can engage and be positioned with the engaging teeth 210. When the pushing component 300 moves along a first direction, it can cause the inner wall of the pushing groove 321 to push the elastic element 500 away from the engaging teeth 210 along a second direction. In this embodiment, the first direction is parallel to the extension direction of the blade 400, and the second direction is perpendicular to the plane where the blade 400 is located. That is, when the user moves the pushing component 300 along the first direction, the elastic element 500 can directly disengage from the engaging teeth 210 along a plane perpendicular to the plane where the blade 400 is located under the action of the inner wall of the pushing groove 321. This rapid response increases the unlocking speed of the blade 400 and avoids wear between the elastic element 500 and the engaging teeth 210 of the blade holder 200.

[0058] More specifically, continue to refer to Figures 1-3The utility knife also includes a breaker 600. The breaker 600 is detachably connected to the end of the outer casing 100 away from the second opening 120 via a quick-release connector or similar means. The breaker 600 has a breaker slot 610; by inserting a portion of the blade 400 into the breaker slot 610 and then bending the blade 400, the damaged portion of the blade 400 can be broken off.

[0059] Continue to refer to Figures 7-10 The pushing assembly 300 includes a sliding seat 310 and a push button structure 320. The sliding seat 310 is connected to the push button structure 320, and the aforementioned pushing groove 321 is formed on the push button structure 320. A support platform 311 is provided on the side of the sliding seat 310 facing the push button structure 320. The elastic element 500 includes an engaging connection portion 510 and an elastic recovery portion 520 connected to each other. The engaging connection portion 510 protrudes relative to the elastic recovery portion 520. The elastic recovery portion 520 is limitedly connected to the pushing assembly 300, the engaging connection portion 510 is accommodated in the pushing groove 321, and the elastic recovery portion 520 abuts against the support platform 311. In other words, through the combined action of the sliding seat 310 and the push button structure 320, the elastic element 500 can be fixed, allowing it to move synchronously with the push button structure 320 along a first direction.

[0060] Specifically, the sliding seat 310 has an insertion interface 312, and the push button structure 320 includes a push button seat 324 and an insertion boss 325. The push button seat 324 is slidably disposed in the receiving space of the tool holder 200 along a first direction, and the insertion boss 325 is disposed on the side of the push button seat 324 facing the sliding seat 310. The pushing groove 321 is formed on the side of the insertion boss 325 facing the sliding seat 310.

[0061] More specifically, the push button structure 320 also includes a push button body 326, which is connected to the push button seat 324 and extends out of the outer casing 100 from the first opening 110.

[0062] To be more specific, refer to Figure 6 The insertion boss 325 has a locking protrusion 327 on the side of the push groove 321 near the push button body 326 and / or on the side opposite to the push button body 326. The locking protrusion 327 can engage with the insertion interface 312. In this embodiment, the insertion boss 325 has locking protrusions 327 on both the side near the push button body 326 and the side opposite to the push button body 326, which can enhance the connection reliability between the sliding seat 310 and the push button seat 324.

[0063] More specifically, the elastic element 500 includes an engaging connection portion 510 and an elastic recovery portion 520 connected to each other, the engaging connection portion 510 being accommodated in the pushing groove 321. In this embodiment, the engaging connection portion 510 and the elastic recovery portion 520 may be formed by bending the same spring sheet.

[0064] Preferably, there are two elastic recovery portions 520, each disposed on one side of the engaging connection portion 510. That is, by bending a single spring sheet, an engaging connection portion 510 with a rectangular or other shaped cross-section is formed at the center line of the spring sheet, and straight plate-shaped elastic recovery portions 520 are formed on opposite sides of the engaging connection portion 510. This arrangement ensures the supporting performance of the elastic recovery portions 520 on the engaging connection portion 510, and improves the stability and reliability of the engaging connection portion 510 meshing with the engaging teeth 210 when self-locking the position of the blade 400.

[0065] More specifically, the sliding seat 310 is provided with an abutment platform 311. The abutment platform 311 is spaced apart from the pushing groove 321 and is formed on the side of the sliding seat 310 facing the push button structure 320. The elastic recovery part 520 can abut against the abutment platform 311, and the engaging connection part 510 can engage with the engaging tooth part 210 under the elastic action of the elastic recovery part 520. That is to say, the entire elastic element 500 is sandwiched between the bottom of the pushing groove 321 and the abutment platform 311.

[0066] It should be noted that, corresponding to the two elastic recovery parts 520, the abutment 311 is also set to two, the two abutment 311 are spaced apart in the first direction, and each corresponds to one elastic recovery part 520, and the two elastic recovery parts 520 abut against the two abutment 311 respectively.

[0067] More specifically, the bottom of the sliding seat 310 is provided with a support portion 314, which can abut against the corresponding inner wall of the receiving space formed by the tool holder 200, thereby improving the stability of the sliding seat 310 when it moves.

[0068] Preferably, in order to improve the smoothness of the movement of the sliding seat 310, in this embodiment, the contact position between the support part 314 and the inner wall of the accommodating space is designed as an arc transition, so as to minimize the friction between the support part 314 and the inner wall of the accommodating space while ensuring the support performance.

[0069] Continue to refer to Figure 4 and Figure 8The sliding seat 310 is provided with a connecting post 313, and the blade 400 has a connecting hole, through which the connecting post 313 passes. Through the cooperation of the connecting post 313 and the connecting hole, a reliable connection between the blade 400 and the sliding seat 310 can be achieved, and the replacement of the blade 400 can be facilitated.

[0070] Continue to refer to Figure 11 The inner wall of the pushing groove 321 forms a first pushing portion 322 and a second pushing portion 323, which are arranged opposite to each other in a first direction. Along the direction pointing towards the opening of the pushing groove 321 in a second direction, the distance between the first pushing portion 322 and the second pushing portion 323 gradually increases, so that the cross-section of the pushing groove 321 is an isosceles trapezoidal shape. The distance between the first pushing portion 322 and the second opening 120 is greater than the distance between the second pushing portion 323 and the second opening 120. The first pushing portion 322 and the second pushing portion 323 can respectively push against the engaging connection portion 510 in the second direction when the push button structure 320 moves in the first direction.

[0071] Specifically, during the process of the blade 400 extending out of the second opening 120, the first pushing part 322 can push the engaging connection part 510 to disengage from the engaging tooth part 210 in the second direction. During the process of the blade 400 retracting into the second opening 120, the second pushing part 323 pushes the engaging connection part 510 to disengage from the engaging tooth part 210 in the second direction.

[0072] Preferably, the apex of the engaging connection 510 where it contacts the first abutting part 322 has an arc-shaped transition. The apex of the engaging connection 510 where it contacts the second abutting part 323 also has an arc-shaped transition. This arrangement prevents damage to the elastic element 500 due to stress concentration, and the arc-shaped transition facilitates the abutting of the first abutting part 322 and the second abutting part 323 against the engaging connection 510, thus improving the response speed of the elastic element 500.

[0073] Preferably, the side ridge of the housing 100 is provided with a push button receiving groove 130 along its length. The first opening 110 is formed at the bottom of the push button receiving groove 130, and the push button body 326 can be received in the push button receiving groove 130 and slide within the push button receiving groove 130. The push button receiving groove 130 can limit the movement of the push button body 326, ensuring the smooth extension and retraction of the blade 400.

[0074] More specifically, refer to Figure 3The push button body 326 has a symmetrical structure in the second direction. With the above design, it is not only easy for right-handed users to use, but also for left-handed users to use, making the utility knife ambidextrous.

[0075] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A utility knife characterized in that, include: The outer shell (100) has a first opening (110) on the side ridge and a second opening (120) on the top; A tool holder (200) is disposed in the housing (100) and is provided with meshing teeth (210); A push assembly (300) is movably disposed in the tool holder (200) along a first direction and extends partially out of the first opening (110); The blade (400) is disposed in the blade holder (200) and connected to the push assembly (300), and can extend or retract into the second port (120) under the drive of the push assembly (300); the plane of the meshing teeth (210) is perpendicular to the plane of the side of the blade (400); The elastic element (500) is limitedly connected to the push assembly (300) and can engage and be positioned on the meshing teeth (210); When the pushing component (300) moves in the first direction, it can push against the elastic element (500) so that the elastic element (500) can disengage from the meshing tooth (210) in the second direction; The first direction is parallel to the extension direction of the blade (400), and the second direction is perpendicular to the plane containing the side surface of the blade (400).

2. The utility knife of claim 1, wherein, The pushing assembly (300) is provided with a pushing groove (321), and the elastic element (500) is partially accommodated in the pushing groove (321). When the pushing assembly (300) moves in the first direction, the inner wall of the pushing groove (321) can push the elastic element (500) so that the elastic element (500) can disengage from the meshing tooth portion (210) in the second direction.

3. The utility knife according to claim 2, characterized in that, The inner wall of the pushing groove (321) forms a first pushing part (322) and a second pushing part (323), and the first pushing part (322) and the second pushing part (323) are arranged opposite to each other in a first direction; The first pushing part (322) and the second pushing part (323) can push the elastic element (500) so that the elastic element (500) can disengage from the meshing teeth in the second direction.

4. The utility knife of claim 3, wherein, The apex of the elastic element (500) where it contacts the first abutting portion (322) has an arc-shaped transition; and / or, The apex of the elastic element (500) that contacts the second pushing part (323) has an arc-shaped transition.

5. The utility knife of claim 3, wherein, The elastic element (500) includes an engaging connection portion (510) and an elastic recovery portion (520) connected to each other. The engaging connection portion (510) is at least partially accommodated in the pushing groove (321). The engaging connection portion (510) is protruding relative to the elastic recovery portion (520). The elastic recovery portion (520) is limitedly connected to the pushing assembly (300). The first pushing portion (322) and the second pushing portion (323) can push the engaging connection portion (510) to disengage from the engaging tooth portion (210).

6. The utility knife of claim 5, wherein, The pushing component (300) is provided with a backing platform (311), the backing platform (311) and the pushing groove (321) are spaced apart, the elastic recovery part (520) is attached to the backing platform (311), and the meshing connection part (510) can mesh with the meshing tooth part (210) under the elastic action of the elastic recovery part (520).

7. The utility knife according to claim 6, characterized in that, There are two elastic recovery parts (520), which are respectively disposed on both sides of the meshing connection part (510). There are two abutment platforms (311), and the two elastic recovery parts (520) abut against the two abutment platforms (311) respectively.

8. The utility knife of claim 6, wherein, The pushing assembly (300) includes a sliding seat (310) and a push button structure (320). The sliding seat (310) is connected to the push button structure (320). The pushing groove (321) is formed on the push button structure (320). The abutting platform (311) is located on the side of the sliding seat (310) facing the push button structure (320).

9. The utility knife of claim 8, wherein, The sliding seat (310) has an insertion interface (312), and the push button structure (320) includes a push button seat (324) and an insertion boss (325). The push button seat (324) is slidably disposed in the tool holder (200), and the insertion boss (325) is disposed on the side of the push button seat (324) facing the sliding seat (310) and can be inserted into the insertion interface (312). The pushing groove (321) is formed on the side of the insertion boss (325) facing the sliding seat (310).

10. The utility knife of claim 9, wherein, The push button structure (320) further includes a push button body (326), which is connected to the push button seat (324) and can extend out of the outer shell (100) from the first through-hole (110). The insertion boss (325) is provided with a snap-fit ​​protrusion (327) on the side of the push groove (321) near the push button body (326) and / or on the side opposite to the push button body (326). The snap-fit ​​protrusion (327) can snap into the insertion interface (312).

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