Art knife

Abstract

The utility model belongs to the technical field of cutters, and discloses an art knife which comprises a shell, a knife rest, a push button structure, an elastic element and a blade. The side ridge of the shell is provided with a first port, and the top is provided with a second port; the knife rest is arranged in the shell, and the blade is movably arranged in the knife rest and can move in the length direction of the shell to stretch out of or retract into the second through opening. A meshing tooth part is arranged on one side of the knife rest, and the plane where the meshing tooth part is located is perpendicular to the plane where the blade is located. The elastic element is connected to the push button structure, one part of the push button structure can stretch out of the first through opening, one part of the elastic element can be meshed with the meshing tooth part, and the elastic element can be driven by the push button structure to move in the length direction of the shell to be disengaged from the meshing tooth part in the direction parallel to the plane where the blade is located. The art knife has left and right hand universality, the structure can be simplified, and the reliability is high.

Description

utility knife Technical Field

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

[0002] The utility knife features a pull-out design for both the outer casing and the blade, allowing the blade to extend or retract relative to the casing. Traditional utility knives have a push button position and width designed specifically for right-handed users, making them less user-friendly for left-handed users. Furthermore, the push button is positioned close to the blade, posing a risk of cuts.

[0003] Therefore, there is an urgent need for a utility knife to solve the above problems. Summary of the Invention

[0004] The purpose of this utility model is to provide a utility knife that is ambidextrous, has a simplified structure, and is highly reliable.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Utility knives, including:

[0007] The outer casing has a first opening on the side ridge and a second opening on the top.

[0008] The tool holder and the blade are provided. The tool holder is disposed in the housing, and the blade is movably disposed in the tool holder. The blade is capable of extending out or retracting into the second opening along the length direction of the housing. A meshing tooth portion is provided on one side of the tool holder, and the plane on which the surface of the meshing tooth portion is located is perpendicular to the plane on which the side of the blade is located.

[0009] A push button structure and an elastic element are provided. The elastic element is connected to the push button structure. A portion of the push button structure can extend out of the first opening. A portion of the elastic element can engage with the meshing teeth. The elastic element can also disengage from the meshing teeth in a direction parallel to the plane of the blade under the influence of the push button structure moving along the length of the housing.

[0010] As a preferred embodiment of the utility knife provided by this utility model, the push button structure includes a push button base, on which a first pushing part and a second pushing part are formed. The first pushing part and the second pushing part are spaced apart in the length direction of the outer shell. A first inclined guide surface and a second inclined guide surface are respectively provided on the opposite sides of the first pushing part and the second pushing part. The elastic element is provided with a protrusion, which is sandwiched between the first inclined guide surface and the second inclined guide surface. The protrusion can engage with the meshing teeth.

[0011] 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 first opening.

[0012] As a preferred embodiment of the utility knife provided by this utility model, the side ridge of the outer shell is provided with a push button receiving groove, the first opening is opened at the bottom of the push button receiving groove, and the push button body can be accommodated in the push button receiving groove.

[0013] As a preferred embodiment of the utility knife provided by this utility model, the elastic element is provided with two protrusions, which are spaced apart along the length of the outer shell.

[0014] As a preferred embodiment of the utility knife provided by this utility model, the utility knife further includes a sliding seat, which is slidably accommodated in the knife holder and connected to the push button structure. The elastic element is located between the sliding seat and the push button structure, and the blade is connected to the sliding seat.

[0015] As a preferred embodiment of the utility knife provided by this utility model, a first locking member is provided on the side of the sliding base facing the push button structure, and a second locking member is provided on the side of the push button structure facing the sliding base. The first locking member can abut against and lock with the second locking member.

[0016] As a preferred embodiment of the utility knife provided by this utility model, the end of the first locking member is provided with a first locking portion, and the end of the second locking member is provided with a second locking portion. The side of the first locking portion facing the sliding seat and the side of the second locking portion facing the push button structure abut against each other and lock together.

[0017] As a preferred embodiment of the utility knife provided by this utility model, the sliding base is provided with a peripheral positioning part and an internal positioning part on the side facing the push button structure. An elastic element positioning space is formed between the peripheral positioning part and the internal positioning part. The elastic element is installed in the elastic element positioning space, and the internal positioning part and the peripheral positioning part abut against the opposite sides of the elastic element, respectively.

[0018] As a preferred embodiment of the utility knife provided by this utility model, the sliding base is provided with a connecting post, the blade has a connecting hole, and the connecting post passes through the connecting hole; and / or,

[0019] The sliding seat is provided with a limiting member, and a blade limiting space is formed between the limiting member and the sliding seat. A portion of the blade can be inserted and fixed in the blade limiting space.

[0020] The beneficial effects of this utility model are:

[0021] The utility knife provided by this utility model includes a shell, a blade holder, a push button structure, an elastic element, and a blade. A first opening is formed on the side ridge of the shell, and a second opening is formed on the top. The shell protects the blade holder, push button structure, elastic element, and blade, and separates the user's hand from the blade to prevent cuts. The blade holder is housed within the shell, and the blade is movably housed within the blade holder, extending or retracting along the length of the shell into the second opening. A meshing tooth is provided on one side of the blade holder, the plane of which is perpendicular to the plane of the blade. The elastic element is connected to the push button structure; a portion of the push button structure extends out of the first opening, and a portion of the elastic element engages with the meshing tooth. The elastic element can also disengage from the meshing tooth in a direction parallel to the plane of the blade, driven by the movement of the push button structure along the length of the shell. The push button structure can be locked at any position on the blade holder via the elastic element. Furthermore, because the push button structure can extend from the first opening on the side ridge of the outer casing, the utility knife is ambidextrous. Attached Figure Description

[0022] 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.

[0023] Figure 1 is a structural schematic diagram of the utility knife provided in Embodiment 1 of this utility model;

[0024] Figure 2 is a structural schematic diagram of the utility knife provided in Embodiment 1 of this utility model;

[0025] Figure 3 is a top view of the utility knife provided in Embodiment 1 of this utility model;

[0026] Figure 4 is a partial structural schematic diagram of the utility knife provided in Embodiment 1 of this utility model;

[0027] Figure 5 is a partial structural schematic diagram of the utility knife provided in Embodiment 1 of this utility model.

[0028] Figure 6 is a partial structural schematic diagram of the utility knife provided in Embodiment 1 of this utility model;

[0029] Figure 7 is a structural schematic diagram of the sliding seat provided in Embodiment 1 of this utility model;

[0030] Figure 8 is a schematic diagram of the elastic element and push button structure provided in Embodiment 1 of this utility model;

[0031] Figure 9 is a front view of the elastic element and push button structure provided in Embodiment 1 of this utility model;

[0032] Figure 10 is a magnified view of the structure marked A in Figure 9;

[0033] Figure 11 is a partial structural schematic diagram of the utility knife provided in Embodiment 2 of this utility model;

[0034] Figure 12 is a schematic diagram of the elastic element and push button structure provided in Embodiment 2 of this utility model.

[0035] In the picture:

[0036] 100. Outer casing; 110. First opening; 120. Second opening; 130. Push button receiving groove;

[0037] 200. Tool holder; 210. Meshing teeth; 220. Limiting part;

[0038] 300, Push button structure; 310, Push button base; 320, First pushing part; 321, First inclined guide surface; 330, Second pushing part; 331, Second inclined guide surface; 340, Push button body; 350, Second snap-fit ​​component;

[0039] 400. Elastic element; 410. Protrusion;

[0040] 500, blade; 510, connecting hole;

[0041] 600, sliding seat; 610, first locking component; 620, peripheral positioning part; 630, internal positioning part; 640, connecting post; 650, limiting component; 660, blade limiting space;

[0042] 700, breaker; 710, breaker gap. Detailed Implementation

[0043] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] In this embodiment, the term "and / or" is merely a description of the relationship between related 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 related objects have an "or" relationship; in this embodiment, the term "engagement" refers to mating.

[0051] 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.

[0052] Example 1

[0053] Figure 1 shows a schematic diagram of the structure of the utility knife provided in Embodiment 1 of the present invention. Figure 2 shows a schematic diagram of the structure of the utility knife provided in Embodiment 1 of the present invention. Figure 3 shows a top view of the utility knife provided in Embodiment 1 of the present invention. Figure 4 shows a partial schematic diagram of the structure of the utility knife provided in Embodiment 1 of the present invention. Figure 5 shows a partial schematic diagram of the structure of the utility knife provided in Embodiment 1 of the present invention. Figure 6 shows a partial schematic diagram of the structure of the utility knife provided in Embodiment 1 of the present invention. Referring to Figures 1-3, this embodiment provides a utility knife. The utility knife includes a shell 100, a knife holder 200, a push button structure 300, an elastic element 400, and a blade 500.

[0054] Specifically, the outer 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 outer casing 100, and the elastic element 400 is connected to the push button structure 300, a portion of which extends out of the first opening 110. The blade 500 is movably disposed within the blade holder 200, connected to the push button structure 300, and can extend or retract into the second opening 120 along the length of the outer casing 100. In other words, by providing the aforementioned outer casing 100, the blade holder 200, the push button structure 300, the elastic element 400, and the blade 500 can be protected, and the user's hand can be kept away from the blade 500 to prevent cuts.

[0055] More specifically, a meshing tooth 210 is provided on one side of the knife holder 200. The meshing tooth 210 extends along the length of the outer casing 100, and the plane of the meshing tooth 210 is perpendicular to the plane of the side surface of the blade 500. A portion of the elastic element 400 can engage with the meshing tooth 210. The elastic element 400 can also disengage from the meshing tooth 210 in a direction parallel to the plane of the side surface of the blade 500, driven by the movement of the push button structure 300 along the length of the outer casing 100. In other words, the push button structure 300 can be positioned and locked at any position on the knife holder 200 through the elastic element 400, and because the push button structure 300 can extend from the side ridge of the outer casing 100, the utility knife is ambidextrous. The push button structure 300 also allows for manual extension and retraction of the blade 500. By setting the plane of the meshing teeth 210 to be perpendicular to the plane of the blade 500, the structural strength and reliability of the meshing teeth 210 can be improved, and the position locking of the blade 500 and the reliability of the utility knife can be guaranteed.

[0056] Referring again to Figures 4 and 5, the tool holder 200 is also provided with a limiting portion 220. On the side of the tool holder 200 opposite to the meshing tooth portion 210, the limiting portion 220 is folded to form a limiting space. One side of the blade 500 can be accommodated in the limiting space to prevent the blade 500 from swinging relative to the tool holder 200 and to ensure the smoothness of the blade 500 when it extends and retracts relative to the housing 100.

[0057] Referring to Figures 2 and 3, the utility knife also includes a breaker 700. The breaker 700 is detachably connected to the end of the housing 100 away from the second opening 120 via a quick-release connector or similar means. The breaker 700 has a breaker slot 710; by inserting a portion of the blade 500 into the breaker slot 710 and then bending the blade 500, the damaged portion of the blade 500 can be broken off.

[0058] Figure 7 is a schematic diagram of the sliding seat provided in Embodiment 1 of this utility model; Figure 8 is a schematic diagram of the elastic element and push button structure provided in Embodiment 1 of this utility model. Referring to Figures 7 and 8, the utility knife also includes a sliding seat 600. The sliding seat 600 is slidably accommodated in the knife holder 200 along the length direction of the outer shell 100 and connected to the push button structure 300. The elastic element 400 is located between the sliding seat 600 and the push button structure 300, and the blade 500 is connected to the sliding seat 600. By setting the sliding seat 600, the push button structure 300 and the elastic element 400 can be connected and integrated, and connected to the blade 500, so that the push button structure 300 drives the blade 500.

[0059] Specifically, the sliding seat 600 has a first latching member 610 on the side facing the push button structure 300. The push button structure 300 has a second latching member 350 on the side facing the sliding seat 600, and the first latching member 610 can abut against and latch with the second latching member 350.

[0060] In this embodiment, referring to Figures 6-8, there are four first latching members 610, which are spaced apart to form a rectangular array. Each first latching member 610 has a protruding first latching portion at its end. In Figure 7, the first latching portions of the two upper first latching members 610 protrude upwards, and the first latching portions of the two lower first latching members 610 protrude downwards. Correspondingly, there are four second latching members 350, which are spaced apart to form a rectangular array. Each second latching member 350 has a protruding second latching portion at its end. In Figure 8, the second latching portions of the two upper second latching members 350 protrude downwards, and the second latching portions of the two lower second latching members 350 protrude upwards. The first engaging portion of the upper first engaging member 610 can engage with the second engaging portion of the upper second engaging member 350; the first engaging portion of the lower first engaging member 610 can engage with the second engaging portion of the lower second engaging member 350. The side of the first engaging portion facing the slide base 600 and the side of the second engaging portion facing the push button structure 300 abut against each other. Through the engaging connection between the first engaging member 610 and the second engaging member 350, the assembly, connection, and disassembly of the slide base 600 and the push button structure 300 are facilitated.

[0061] More specifically, referring to Figures 5-7, the sliding seat 600 has a peripheral positioning part 620 and an internal positioning part 630 on the side facing the push button structure 300. An elastic element positioning space is formed between the peripheral positioning part 620 and the internal positioning part 630. The elastic element 400 is installed in this elastic element positioning space, and the internal positioning part 630 and the peripheral positioning part 620 respectively abut against opposite sides of the elastic element 400. The elastic element 400 is an annular structure with a rounded rectangular cross-section formed by bending a spring sheet. Triangular protrusions 410 are formed on both sides of the opening of the annular structure.

[0062] More specifically, in this embodiment, the internal positioning part 630 includes a plurality of first protrusions, and the peripheral positioning part 620 includes a plurality of second protrusions. The plurality of first protrusions can abut against the inner side of the elastic element 400, and the plurality of second protrusions can abut against the outer side of the elastic element 400. Under the action of the peripheral positioning part 620 and the internal positioning part 630, the elastic element 400 can be reliably mounted on the sliding seat 600.

[0063] More specifically, referring to Figures 4-6, the sliding seat 600 is provided with a connecting post 640, and the blade 500 has a connecting hole 510, with the connecting post 640 passing through the connecting hole 510. Through the cooperation of the connecting post 640 and the connecting hole 510, a reliable connection between the blade 500 and the sliding seat 600 can be achieved, and the replacement of the blade 500 can be facilitated.

[0064] More specifically, referring to Figure 6, a limiting member 650 is provided on the sliding base 600. The limiting member 650 has a rectangular block structure, forming a blade limiting space 660 between itself and the sliding base 600. A portion of the end of the blade 500 can be inserted into and fixed in the blade limiting space 660. Through the aforementioned limiting member 650, the connection reliability between the blade 500 and the sliding base 600 can be further improved, and the stability of the blade 500 during use can be guaranteed.

[0065] Figure 9 is a front view of the elastic element and push button structure provided in Embodiment 1 of this utility model; Figure 10 is a partial enlarged view of the structure marked A in Figure 9. Referring to Figures 5, 8, 9, and 10, the push button structure 300 includes a push button base 310. A first pushing portion 320 and a second pushing portion 330 are formed on the push button base 310. The first pushing portion 320 and the second pushing portion 330 are spaced apart along the length of the housing 100. A first inclined guide surface 321 and a second inclined guide surface 331 are respectively provided on the opposite sides of the first pushing portion 320 and the second pushing portion 330. The protrusion 410 is sandwiched between the first inclined guide surface 321 and the second inclined guide surface 331. Along the direction parallel to the paper and upward in Figure 10, both the first inclined guide surface 321 and the second inclined guide surface 331 gradually approach the protrusion 410. During the process of the blade 500 extending out of the second opening 120, the first inclined guide surface 321 presses against the protrusion 410 to disengage from the meshing tooth 210. During the process of the blade 500 retracting into the second opening 120, the second inclined guide surface 331 presses against the protrusion 410 to disengage from the meshing tooth 210.

[0066] Specifically, the two protrusions 410 of the elastic element 400 are spaced apart along the length of the housing 100. Correspondingly, there are also two first pushing parts 320 and two second pushing parts 330. During the process of the blade 500 extending out of the second opening 120, the two first pushing parts 320 can act on the two protrusions 410 respectively; during the process of the blade 500 retracting into the second opening 120, the two second pushing parts 330 can act on the two protrusions 410 respectively. Through the above arrangement, the connection reliability between the elastic element 400 and the meshing tooth 210 can be improved.

[0067] More specifically, the push button structure 300 also includes a push button body 340, which is connected to the push button seat 310 and can extend out of the first opening 110.

[0068] 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 340 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 340, ensuring the smooth extension and retraction of the blade 500.

[0069] More specifically, referring to Figure 3, the push button body 340 is symmetrical in the thickness direction of the outer casing 100. This design facilitates use not only by right-handed users but also by left-handed users, making the utility knife ambidextrous.

[0070] Example 2

[0071] This embodiment provides a utility knife.

[0072] Figure 11 shows a partial structural schematic diagram of the utility knife provided in Embodiment 2 of the present invention; Figure 12 shows a schematic diagram of the elastic element and push button structure provided in Embodiment 2 of the present invention. Referring to Figures 11 and 12, the difference between this embodiment and Embodiment 1 is that the structure of the elastic element 400 in this embodiment is different from that in Embodiment 1.

[0073] In this embodiment, the elastic element 400 is an annular structure with an opening formed by bending a spring sheet. The elastic element 400 has two side elastic portions that are inclined along the length of the outer casing 100, and the distance between the two side elastic portions gradually decreases along the direction close to the opening. On both sides of the opening of the annular structure, that is, at the ends of the two side elastic portions, protrusions 410 with a triangular cross-section are formed respectively.

[0074] Specifically, in this embodiment, there is one first pushing part 320 and one second pushing part 330. The first pushing part 320 and the second pushing part 330 are arranged in the length direction of the outer shell 100. The first inclined guide surface 321 of the first pushing part 320 abuts against the side of the first protrusion 410 away from the second protrusion 410, and the second inclined guide surface 331 of the second pushing part 330 abuts against the side of the second protrusion 410 away from the first protrusion 410.

[0075] As the blade 500 extends out of the second opening 120, the first inclined guide surface 321 of the first pushing part 320 presses against the first protrusion 410 to disengage from the meshing tooth 210. The inclined side of the second protrusion 410 moves under the pressure of the meshing tooth 210, similarly disengaging from the meshing tooth 210. As the blade 500 retracts into the second opening 120, the second inclined guide surface 331 of the second pushing part 330 presses against the second protrusion 410 to disengage from the meshing tooth 210. The inclined side of the first protrusion 410 moves under the pressure of the meshing tooth 210, similarly disengaging from the meshing tooth 210.

[0076] 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) and a blade (500) are provided. The tool holder (200) is disposed in the housing (100), and the blade (500) is movably disposed in the tool holder (200). The blade (500) can extend or retract into the second opening (120) along the length direction of the housing (100). A meshing tooth portion (210) is provided on one side of the tool holder (200), and the plane on which the surface of the meshing tooth portion (210) is located is perpendicular to the plane on which the side of the blade (500) is located. A push button structure (300) is also provided. The push button structure (300) and the elastic element (400) are connected to the push button structure (300). A part of the push button structure (300) can extend out of the first opening (110). A part of the elastic element (400) can engage with the meshing teeth (210). The elastic element (400) can also disengage from the meshing teeth (210) in a direction parallel to the plane of the blade (500) under the action of the push button structure (300) moving along the length direction of the housing (100).

2. The utility knife according to claim 1, characterized in that, The push button structure (300) includes a push button seat (310), on which a first push part (320) and a second push part (330) are formed. The first push part (320) and the second push part (330) are spaced apart in the length direction of the outer shell (100). A first inclined guide surface (321) and a second inclined guide surface (331) are respectively provided on the opposite side of the first push part (320) and the second push part (330). The elastic element (400) is provided with a protrusion (410), which is sandwiched between the first inclined guide surface (321) and the second inclined guide surface (331). The protrusion (410) can engage with the meshing tooth part (210).

3. The utility knife according to claim 2, characterized in that, The push button structure (300) further includes a push button body (340), which is connected to the push button seat (310) and can extend out of the first opening (110).

4. The utility knife according to claim 3, characterized in that, The outer casing (100) has a push button receiving groove (130) on its side ridge. The first opening (110) is opened at the bottom of the push button receiving groove (130), and the push button body (340) can be accommodated in the push button receiving groove (130).

5. The utility knife according to claim 2, characterized in that, The elastic element (400) is provided with two protrusions (410), which are spaced apart along the length of the outer casing (100).

6. The utility knife according to any one of claims 1-5, characterized in that, The utility knife also includes a sliding base (600), which is slidably accommodated in the knife holder (200) and connected to the push button structure (300). The elastic element (400) is located between the sliding base (600) and the push button structure (300), and the blade (500) is connected to the sliding base (600).

7. The utility knife according to claim 6, characterized in that, The sliding seat (600) is provided with a first latching member (610) on the side facing the push button structure (300), and the push button structure (300) is provided with a second latching member (350) on the side facing the sliding seat (600). The first latching member (610) can abut against and latch with the second latching member (350).

8. The utility knife according to claim 7, characterized in that, The first snap-fit ​​member (610) has a first snap-fit ​​portion protruding from its end, and the second snap-fit ​​member (350) has a second snap-fit ​​portion protruding from its end. The side of the first snap-fit ​​portion facing the sliding seat (600) and the side of the second snap-fit ​​portion facing the push button structure (300) abut against each other and snap together.

9. The utility knife according to claim 7, characterized in that, The sliding seat (600) is provided with a peripheral positioning part (620) and an internal positioning part (630) on the side facing the push button structure (300). An elastic element positioning space is formed between the peripheral positioning part (620) and the internal positioning part (630). The elastic element (400) is installed in the elastic element positioning space. The internal positioning part (630) and the peripheral positioning part (620) respectively abut against the opposite sides of the elastic element (400).

10. The utility knife according to claim 7, characterized in that, The sliding seat (600) is provided with a connecting post (640), and the blade (500) has a connecting hole (510), through which the connecting post (640) passes; and / or, the sliding seat (600) is provided with a limiting member (650), and a blade limiting space (660) is formed between the limiting member (650) and the sliding seat (600), and a part of the blade (500) can be inserted and fixed in the blade limiting space (660).

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