utility knife

Abstract

This utility model belongs to the field of hand tools technology and discloses a utility knife, including a blade shell, a blade rail, a pushing mechanism, and a blade. The blade shell has a telescopic opening at one end in a first direction and an operating opening on one side in a second direction. The blade rail is disposed within the blade shell, and an engaging portion is provided on the side in the second direction. The pushing mechanism includes a sliding base, a first elastic structure, and a second elastic structure. The sliding base is movably disposed within the blade rail along the first direction, with a portion extending out of the operating opening. The first and second elastic structures are respectively connected to the sliding base and can both engage with the engaging portion, and can also disengage from the engaging portion as the sliding base slides along the first direction. The blade is disposed within the blade rail and connected to the sliding base. The pushing mechanism can push the blade to extend and retract relative to the telescopic opening. This utility knife is ambidextrous and improves reliability and lifespan.

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 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 are designed with the push button position and width geared towards 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] Existing technology provides a side-push utility knife with a push button located on the side ridge of the casing, enabling ambidextrous operation. However, existing side-push utility knives generally use only a single elastic element that can be separably engaged with the meshing teeth on the blade rail to position or unlock the blade on the blade rail. Using only a single elastic element leads to fatigue and other problems with frequent use, resulting in insufficient 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 reliability and service life of use.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Utility knives, including:

[0008] The blade housing has a telescopic opening at one end in the first direction and an operating opening on one side in the second direction;

[0009] A tool rail is disposed in the tool housing, and an engagement portion is provided on the side in the second direction, the engagement portion extending along the first direction;

[0010] The pushing mechanism includes a sliding base, a first elastic structure, and a second elastic structure. The sliding base is movably disposed in the tool rail along a first direction, with a portion extending out of the operating port. The first elastic structure and the second elastic structure are respectively connected to the sliding base and can both engage with the engaging part, and can also disengage from the engaging part as the sliding base slides along the first direction.

[0011] The blade is disposed in the tool rail and connected to the sliding base. The pushing mechanism can push the blade to extend and retract relative to the telescopic port.

[0012] The first direction is parallel to the extension direction of the blade, and the second direction is perpendicular to the first direction and parallel to the width direction of the blade.

[0013] As a preferred embodiment of the utility knife provided by this utility model, the engaging part includes a plurality of first engaging teeth, the plurality of first engaging teeth extending and arranged along a first direction, the plane on which the surface of the first engaging teeth is located is perpendicular to the plane on which the side of the blade is located, and the first elastic structure can engage with the first engaging teeth.

[0014] As a preferred embodiment of the utility knife provided by this utility model, the first elastic structure includes an elastic locking head and a spring connected to each other; the sliding base is provided with a receiving groove, the spring is disposed in the receiving groove, the elastic locking head can extend out of the receiving groove and engage with the first engaging tooth portion; the elastic locking head can also retract into the receiving groove to disengage from the first engaging tooth portion; the first engaging tooth portion has a notch, the notch is disposed towards the elastic locking head, and when the elastic locking head engages with the first engaging tooth portion, the elastic locking head passes through the notch.

[0015] As a preferred embodiment of the utility knife provided by this utility model, the sliding base is provided with a pushing part, the pushing part forms a pushing groove, the elastic locking head extends into the pushing groove, and the pushing groove forms a first pushing surface and a second pushing surface on opposite sides in a first direction, respectively. The sliding base moves back and forth along the first direction, which can respectively drive the first pushing surface or the second pushing surface to push the elastic locking head back into the receiving groove.

[0016] As a preferred embodiment of the utility knife provided by this utility model, the engaging portion includes a plurality of second engaging teeth, the plurality of second engaging teeth extending and arranged along a first direction, the second engaging teeth being disposed on the side opposite to the first engaging teeth in a second direction, and the second elastic structure being able to engage with the second engaging teeth.

[0017] As a preferred embodiment of the utility knife provided by this utility model, the second elastic structure is located on the side opposite to the first elastic structure in the second direction. When the first elastic structure engages with the first meshing tooth, the second elastic structure can also engage synchronously with the second meshing tooth.

[0018] As a preferred embodiment of the utility knife provided by this utility model, the first elastic structure and the second elastic structure are located on the same side in the second direction and can both be engaged with the first meshing tooth portion. The first elastic structure and the second elastic structure are spaced apart in the third direction, which is perpendicular to the first direction and the second direction.

[0019] As a preferred embodiment of the utility knife provided by this utility model, the second elastic structure is V-shaped, including an engaging and locking part and two elastic support parts. The two elastic support parts are located on both sides of the engaging and locking part and are movably mounted on the sliding base. The engaging and locking part can engage with the first engaging tooth or the second engaging tooth under the support of the elastic support parts. The elastic support parts can deform under the movement of the sliding base in the first direction, so that the engaging and locking part disengages from the first engaging tooth or the second engaging tooth.

[0020] As a preferred embodiment of the utility knife provided by this utility model, the sliding base includes a push button base and a sliding base. The push button base is provided with a snap-fit ​​component, and the sliding base has a snap-fit ​​hole. The snap-fit ​​component can be inserted into and snapped into the snap-fit ​​hole. The first elastic structure and the second elastic structure are sandwiched between the push button base and the sliding base.

[0021] As a preferred embodiment of the utility knife provided by this utility model, a push button body is provided on the push button base, and the push button body extends out of the knife shell from the operation port.

[0022] The beneficial effects of this utility model are:

[0023] The utility knife provided by this utility model includes a blade shell, a blade rail, a pushing mechanism, and a blade. The blade shell has a telescopic opening at one end in a first direction and an operating opening on one side in a second direction. The blade rail is disposed within the blade shell, and an engaging portion is provided on its side in the second direction, extending along the first direction. The blade is disposed within the blade rail and can extend and retract relative to the telescopic opening. The aforementioned blade shell protects the components housed within it, improving the overall structural integrity of the utility knife and separating the user's hand from the blade to prevent cuts.

[0024] The pushing mechanism includes a sliding base, a first elastic structure, and a second elastic structure. The sliding base is movably disposed in the cutter rail along a first direction. The blade is connected to the sliding base, and a portion of the sliding base extends out of the operating port. By setting the contact point between the user and the pushing mechanism on the side ridge of the blade housing in a second direction, it can be used by both left and right hands, thus having a wide range of applications.

[0025] The first elastic structure and the second elastic structure are respectively connected to the sliding base and can both engage with the engaging portion. They can also disengage from the engaging portion as the sliding base slides along a first direction. The first direction is parallel to the extension direction of the blade, and the second direction is perpendicular to the first direction and parallel to the width direction of the blade. The simultaneous engagement of the first and second elastic structures with the engaging portion improves the reliability of blade positioning, thereby enhancing the reliability and lifespan of the utility knife. Attached Figure Description

[0026] 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.

[0027] Figure 1 This is a schematic diagram of the structure of the utility knife provided in Embodiment 1 of this utility model. Figure 1 ;

[0028] Figure 2 This is a schematic diagram of the structure of the utility knife provided in Embodiment 1 of this utility model. Figure 2 ;

[0029] Figure 3 This is a top view of the utility knife provided in Embodiment 1 of this utility model;

[0030] Figure 4 This is a partial structural schematic diagram of the utility knife provided in Embodiment 1 of this utility model;

[0031] Figure 5 This is a schematic diagram of the pushing mechanism provided in Embodiment 1 of this utility model;

[0032] Figure 6 This is a partial structural diagram of the pushing mechanism provided in Embodiment 1 of this utility model. Figure 1 ;

[0033] Figure 7 This is a partial structural diagram of the pushing mechanism provided in Embodiment 1 of this utility model. Figure 2 ;

[0034] Figure 8 This is a partial structural diagram of a utility knife provided in Embodiment 2 of this utility model;

[0035] Figure 9 yes Figure 8 A magnified view of a section marked A in the middle;

[0036] Figure 10 This is a partial structural diagram of the first elastic structure and the second elastic structure provided in Embodiment 2 of this utility model;

[0037] Figure 11 This is a partial structural schematic diagram of the pushing mechanism provided in Embodiment 2 of this utility model;

[0038] Figure 12 This is a partial structural schematic diagram of the utility knife provided in Embodiment 3 of this utility model.

[0039] In the picture:

[0040] 100. Blade housing; 110. Telescopic port; 120. Operating port; 130. Push button receiving groove;

[0041] 200. Toolpath; 210. Engaging part; 211. First engaging tooth part; 212. Second engaging tooth part;

[0042] 300. Pushing mechanism; 310. Sliding base; 311. Receiving groove; 312. Pushing part; 313. First pushing surface; 314. Second pushing surface; 315. Push button seat; 316. Sliding seat; 3161. Connecting column; 3162. Support foot; 3163. First positioning part; 3164. Second positioning part; 3165. Abutting beam; 317. Snap-fit ​​part; 318. Snap-fit ​​hole; 319. Push button body; 320. First elastic structure; 321. Elastic locking head; 322. Spring; 330. Second elastic structure; 331. Engaging locking part; 332. Elastic support part; 333. Abutting part;

[0043] 400. Blade;

[0044] 500, breaker; 510, breaker gap. Detailed Implementation

[0045] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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. In this embodiment, the term "engagement" refers to a mating or fitting arrangement.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] Example 1

[0055] Figure 1 This diagram illustrates the structure of the utility knife provided in Embodiment 1 of the present invention. Figure 1 ; Figure 2 This diagram illustrates the structure of the utility knife provided in Embodiment 1 of the present invention. Figure 2 ; Figure 3 This is a top view of the utility knife provided in Embodiment 1 of the present invention; Figure 4 This diagram shows a partial structural schematic of the utility knife provided in Embodiment 1 of this utility model; Figure 5 A schematic diagram of the pushing mechanism provided in Embodiment 1 of this utility model is shown. (Refer to...) Figures 1-5 This embodiment provides a utility knife. The utility knife includes a blade shell 100, a blade rail 200, a pushing mechanism 300, and a blade 400.

[0056] Specifically, the blade housing 100 has a telescopic opening 110 at one end in the first direction and an operating opening 120 on one side in the second direction. A blade rail 200 is disposed within the blade housing 100, and the blade 400 is disposed within the blade rail 200. Both are movable along the first direction to extend and retract relative to the telescopic opening 110. The blade rail 200 has an engaging portion 210 on its side in the second direction, which extends along the first direction. The blade housing 100 protects the components inside, improving the overall structural integrity of the utility knife and separating the user's hand from the blade 400 to prevent cuts.

[0057] To be more specific, continue to refer to Figures 1-3 The utility knife also includes a breaker 500. The breaker 500 is detachably connected to the end of the blade housing 100 away from the telescopic opening 110 via a quick-release connector or similar means. The breaker 500 has a breaker slot 510; by inserting a portion of the blade 400 into the breaker slot 510 and then bending the blade 400, the damaged portion of the blade 400 can be broken off.

[0058] More specifically, the pushing mechanism 300 includes a sliding base 310, a first elastic structure 320, and a second elastic structure 330. The sliding base 310 is movably disposed in the cutter rail 200 along a first direction. The blade 400 is connected to the sliding base 310, and a portion of the sliding base 310 extends out of the operation port 120, serving as a contact position for the user. The first elastic structure 320 and the second elastic structure 330 are respectively connected to the sliding base 310 and can both engage with the engaging portion 210, and can also disengage from the engaging portion 210 as the sliding base 310 slides along the first direction.

[0059] By setting the contact point between the user and the pushing mechanism 300 on the side ridge of the blade housing 100 in the second direction, it can be used by both left and right hands, making it widely applicable. Furthermore, the simultaneous cooperation of the first elastic structure 320 and the second elastic structure 330 with the engaging part 210 can improve the reliability of the blade 400 positioning, thereby enhancing the reliability and service life of the utility knife.

[0060] It should be noted that in this embodiment, the first direction is parallel to the extension direction of the blade 400, and the second direction is perpendicular to the first direction and parallel to the width direction of the blade 400.

[0061] Figure 6 This diagram shows a partial structural illustration of the pushing mechanism provided in Embodiment 1 of the present invention. Figure 1 ; Figure 7 This diagram shows a partial structural illustration of the pushing mechanism provided in Embodiment 1 of the present invention. Figure 2 . Reference Figures 5-7 The sliding base 310 includes a push button base 315 and a sliding base 316. The push button base 315 is provided with a snap-fit ​​member 317, and the sliding base 316 has a snap-fit ​​hole 318. The snap-fit ​​member 317 can be inserted into and snapped into the snap-fit ​​hole 318. In this embodiment, there are four snap-fit ​​members 317 arranged in a rectangular array, and there are also four snap-fit ​​holes 318. The snap-fit ​​members 317 and snap-fit ​​holes 318 correspond one-to-one and are interconnected.

[0062] In other embodiments, the push button seat 315 and the slide seat 316 may also be formed in an integral or inseparable manner.

[0063] Specifically, the push button base 315 has a push button body 319 at its top in the second direction, and the push button body 319 extends out of the blade housing 100 from the operation port 120. The push button body 319 can serve as a contact position for the user.

[0064] More specifically, the push button body 319 has a symmetrical structure in a third direction. In this embodiment, the third direction is perpendicular to the first and second directions, that is, the third direction is perpendicular to the width direction of the blade 400, which is the thickness direction of the utility knife. With the above configuration, it is not only convenient for right-handed users to use, but also for left-handed users, making the utility knife ambidextrous.

[0065] More specifically, the blade housing 100 has a push button receiving groove 130 along its side ridge in the first direction. The operating port 120 is located at the bottom of the push button receiving groove 130, and the push button body 319 can be accommodated within and slide within it. The push button receiving groove 130 limits the movement of the push button body 319, ensuring smooth extension and retraction of the blade 400.

[0066] Continue to refer to Figure 4 and Figure 6 The sliding seat 316 is provided with a connecting post 3161, and the blade 400 has a connecting hole, through which the connecting post 3161 passes. Through the cooperation of the connecting post 3161 and the connecting hole, a reliable connection between the blade 400 and the sliding seat 316 can be achieved, and the replacement of the blade 400 can be facilitated.

[0067] Specifically, the bottom of the sliding seat 316 is provided with a support foot 3162, which can abut against the corresponding inner wall of the receiving space formed by the tool rail 200, thereby improving the stability of the sliding seat 316 when it moves.

[0068] Preferably, in order to improve the smoothness of the movement of the sliding seat 316, in this embodiment, the contact position between the support foot 3162 and the inner wall of the accommodating space formed by the tool rail 200 is designed as an arc transition, so as to minimize the friction between the support foot 3162 and the inner wall of the accommodating space while ensuring the support performance.

[0069] More specifically, the meshing portion 210 includes a plurality of first meshing teeth 211, which are arranged to extend along a first direction. The plane on which the surface of the first meshing teeth 211 is located is perpendicular to the plane on which the side of the blade 400 is located. The first elastic structure 320 can mesh with the first meshing teeth 211.

[0070] More specifically, the engagement portion 210 includes a plurality of second engagement teeth 212, which are arranged extending along a first direction. The second engagement teeth 212 are disposed on the side opposite to the first engagement teeth 211 in a second direction, and the second elastic structure 330 is capable of engaging with the second engagement teeth 212.

[0071] Continue to refer to Figures 4-7The sliding seat 316 is provided with a receiving groove 311. The first elastic structure 320 includes an elastic locking head 321 and a spring 322 connected to each other, with the spring 322 disposed in the receiving groove 311. The elastic locking head 321 can extend out of the receiving groove 311 and engage with the first engaging tooth portion 211; the elastic locking head 321 can also retract into the receiving groove 311 to disengage from the first engaging tooth portion 211. The first engaging tooth portion 211 has a notch facing the elastic locking head 321, and when the elastic locking head 321 engages with the first engaging tooth portion 211, the elastic locking head 321 passes through the notch.

[0072] In this embodiment, the first elastic structure 320 and the second elastic structure 330 are disposed opposite to each other in a second direction. The second elastic structure 330 is located on the side opposite to the first elastic structure 320 in the second direction. The first elastic structure 320 and the second elastic structure 330 are respectively capable of engaging with the first engaging tooth portion 211 and the second engaging tooth portion 212. When the first elastic structure 320 engages with the first engaging tooth portion 211, the second elastic structure 330 can also engage synchronously with the second engaging tooth portion 212.

[0073] Specifically, the second elastic structure 330 has a V-shaped structure, including an engaging and locking portion 331 and two elastic support portions 332. The two elastic support portions 332 are located on both sides of the engaging and locking portion 331 and are movably mounted on the sliding seat 316. The engaging and locking portion 331 can engage with the second engaging tooth portion 212 under the support of the elastic support portions 332, such as... Figure 4 As shown, the elastic support 332 can deform under the movement of the sliding base 310 in the first direction, so that the engaging and locking part 331 disengages from the second engaging tooth part 212.

[0074] More specifically, the sliding seat 316 is provided with an abutment beam 3165, which is parallel to the first direction and located between the second elastic structure 330 and the first elastic structure 320. The second elastic structure 330 also includes two abutment portions 333, which are located at the end of the elastic support portion 332 away from the engaging and locking portion 331. The abutment portions 333 can abut against one side of the abutment beam 3165. The sliding seat 316 is also provided with a first positioning portion 3163 and a second positioning portion 3164. The first positioning part 3163 and the second positioning part 3164 are located on the side of the abutment beam 3165 away from the first elastic structure 320, and the first positioning part 3163 and the second positioning part 3164 are spaced apart in the first direction. The second elastic structure 330 is sandwiched between the first positioning part 3163 and the second positioning part 3164, and the two elastic support parts 332 abut against the first positioning part 3163 and the second positioning part 3164 respectively.

[0075] Preferably, the engaging and locking part 331 has an arc structure to facilitate engagement and disengagement with the second engaging tooth part 212.

[0076] Continue to refer to Figure 5 and Figure 7 The push button base 315 is provided with a push portion 312, which forms a push groove. The elastic locking head 321 can extend into the push groove. The push groove has a first push surface 313 and a second push surface 314 on opposite sides in a first direction. The sliding base 310 reciprocates along the first direction, which can drive the first push surface 313 or the second push surface 314 to push the elastic locking head 321 back into the receiving groove 311 along the second direction.

[0077] When the user controls the sliding base 310 and the blade 400 to move towards the telescopic opening 110 via the push button body 319, the first abutting surface 313 pushes against the elastic locking head 321, pushing the elastic locking head 321 into the retractable receiving groove 311, disengaging it from the first engaging tooth 211, thus unlocking it. When the extension length of the blade 400 meets the requirements, the push button body 319 is stopped. At this time, the elastic locking head 321 extends out of the receiving groove 311 under the action of the spring 322 and engages with and is positioned in the first engaging tooth 211, thus locking it.

[0078] When the user controls the sliding base 310 and the blade 400 to move away from the telescopic opening 110 via the push button body 319, the second abutting surface 314 pushes against the elastic locking head 321, pushing the elastic locking head 321 into the retractable receiving groove 311, disengaging it from the first engaging tooth 211, thus unlocking it. When the blade 400 is fully retracted into the telescopic opening 110, the push button body 319 is stopped being pushed. At this time, the elastic locking head 321 extends out of the receiving groove 311 under the action of the spring 322 and engages with and is positioned in the first engaging tooth 211, thus locking it.

[0079] As the user controls the movement of the sliding base 310 and the blade 400 via the push button body 319, the elastic support 332 deforms, and the engaging locking part 331 disengages from the second engaging tooth part 212 to unlock. When the sliding base 310 and the blade 400 stop moving, the engaging locking part 331 can re-engage with the second engaging tooth part 212 under the action of the elastic support 332 to lock.

[0080] Example 2

[0081] This embodiment provides a utility knife.

[0082] Figure 8This diagram illustrates a partial structure of a utility knife according to Embodiment 2 of the present invention. Figure 1 ; Figure 9 Show Figure 8 A magnified view of a section marked A in the middle; Figure 10 This diagram shows a partial structural schematic of the first elastic structure and the second elastic structure provided in Embodiment 2 of this utility model; Figure 11 A partial structural schematic diagram of the pushing mechanism provided in Embodiment 2 of this utility model is shown. (Refer to...) Figures 8-11 The difference between this embodiment and Embodiment 1 is that, in the utility knife provided in this embodiment, the blade rail 200 is provided with the engaging portion 210 only on one side in the second direction. That is, the engaging portion 210 only includes the first engaging tooth portion 211. The first elastic structure 320 and the second elastic structure 330 are arranged in the same direction in the second direction and are spaced apart in the third direction. Both the first elastic structure 320 and the second elastic structure 330 can be engaged and connected to the first engaging tooth portion 211. The third direction is perpendicular to the first direction and the second direction.

[0083] When the user controls the sliding base 310 and the blade 400 to move towards the telescopic opening 110 via the push button body 319, the first abutting surface 313 pushes against the elastic locking head 321, pushing the elastic locking head 321 into the retractable receiving groove 311, disengaging it from the first engaging tooth 211, thus unlocking it. When the extension length of the blade 400 meets the requirements, the push button body 319 is stopped. At this time, the elastic locking head 321 extends out of the receiving groove 311 under the action of the spring 322 and engages with and is positioned in the first engaging tooth 211, thus locking it.

[0084] When the user controls the sliding base 310 and the blade 400 to move away from the telescopic opening 110 via the push button body 319, the second abutting surface 314 pushes against the elastic locking head 321, pushing the elastic locking head 321 into the retractable receiving groove 311, disengaging it from the first engaging tooth 211, thus unlocking it. When the blade 400 is fully retracted into the telescopic opening 110, the push button body 319 is stopped being pushed. At this time, the elastic locking head 321 extends out of the receiving groove 311 under the action of the spring 322 and engages with and is positioned in the first engaging tooth 211, thus locking it.

[0085] As the user controls the movement of the sliding base 310 and the blade 400 via the push button body 319, the elastic support 332 deforms, and the engaging locking part 331 disengages from the first engaging tooth part 211 to achieve unlocking. When the sliding base 310 and the blade 400 stop moving, the engaging locking part 331 can re-engage with the corresponding first engaging tooth part 211 under the action of the elastic support 332.

[0086] Example 3

[0087] Figure 12 This diagram illustrates a portion of the structure of the utility knife provided in Embodiment 3 of this utility model. (Refer to...) Figure 12 In another utility knife provided in this embodiment, the blade rail 200 is provided with a first engaging tooth portion 211 and a second engaging tooth portion 212 on both sides in the second direction. There are two second elastic structures 330. One second elastic structure 330 and the first elastic structure 320 are located on the same side of the blade rail 200 in the second direction, and the second elastic structure 330 and the first elastic structure 320 are spaced apart along the third direction. The other second elastic structure 330 and the first elastic structure 320 are provided on both sides in the second direction, which can also be understood as the other second elastic structure 330 and the first elastic structure 320 being provided along the width direction of the blade. The two second elastic structures 330 are respectively engaged and connected to the first engaging tooth portion 211 and the second engaging tooth portion 212. Through the above arrangement, the positioning of the pushing mechanism 300 on the blade rail 200 can be made more reliable. The aforementioned third direction is perpendicular to the first and second directions.

[0088] 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 blade housing (100) has a telescopic opening (110) at one end in the first direction and an operating opening (120) on one side in the second direction. A tool rail (200) is disposed in the tool housing (100), and an engagement part (210) is provided on the side in the second direction, the engagement part (210) extending in the first direction; The pushing mechanism (300) includes a sliding base (310), a first elastic structure (320), and a second elastic structure (330). The sliding base (310) is movably disposed in the tool rail (200) along a first direction, with a portion extending out of the operation port (120). The first elastic structure (320) and the second elastic structure (330) are respectively connected to the sliding base (310) and can both engage with the engagement part (210). They can also disengage from the engagement part (210) as the sliding base (310) slides along the first direction. The blade (400) is disposed in the tool rail (200) and connected to the sliding base (310). The pushing mechanism (300) can push the blade (400) to extend or retract relative to the telescopic port (110). The first direction is parallel to the extension direction of the blade (400), and the second direction is perpendicular to the first direction and parallel to the width direction of the blade (400).

2. The utility knife according to claim 1, characterized in that, The meshing portion (210) includes a plurality of first meshing teeth (211), which extend and are arranged along a first direction. The plane on which the surface of the first meshing teeth (211) is located is perpendicular to the plane on which the side of the blade (400) is located. The first elastic structure (320) can mesh with the first meshing teeth (211).

3. The utility knife according to claim 2, characterized in that, The first elastic structure (320) includes an elastic locking head (321) and a spring (322) connected to each other; the sliding base (310) is provided with a receiving groove (311), the spring (322) is disposed in the receiving groove (311), the elastic locking head (321) can extend out of the receiving groove (311) and engage with the first engaging tooth (211); the elastic locking head (321) can also retract the receiving groove (311) to disengage from the first engaging tooth (211); the first engaging tooth (211) has a notch, the notch is disposed facing the elastic locking head (321), when the elastic locking head (321) engages with the first engaging tooth (211), the elastic locking head (321) passes through the notch.

4. The utility knife according to claim 3, characterized in that, The sliding base (310) is provided with a pushing part (312), the pushing part (312) forms a pushing groove, the elastic locking head (321) extends into the pushing groove, the pushing groove forms a first pushing surface (313) and a second pushing surface (314) on opposite sides in a first direction, the sliding base (310) moves back and forth in the first direction, and can respectively drive the first pushing surface (313) or the second pushing surface (314) to push the elastic locking head (321) back into the receiving groove (311).

5. The utility knife according to claim 2, characterized in that, The meshing portion (210) includes a plurality of second meshing teeth (212), which are arranged extending along a first direction. The second meshing teeth (212) are disposed on the side opposite to the first meshing teeth (211) in a second direction. The second elastic structure (330) is capable of meshing with the second meshing teeth (212).

6. The utility knife according to claim 5, characterized in that, The second elastic structure (330) is located on the side opposite to the first elastic structure in the second direction. When the first elastic structure (320) engages with the first meshing tooth (211), the second elastic structure (330) can also engage synchronously with the second meshing tooth (212).

7. The utility knife according to claim 5, characterized in that, The second elastic structure (330) has a V-shaped structure, including an engaging and locking part (331) and two elastic support parts (332). The two elastic support parts (332) are located on both sides of the engaging and locking part (331) and are movably mounted on the sliding base (310). The engaging and locking part (331) can engage with the first engaging tooth part (211) or the second engaging tooth part (212) under the support of the elastic support parts (332). The elastic support part (332) can deform under the movement of the sliding base (310) in the first direction, so that the engaging and locking part (331) disengages from the first engaging tooth part (211) or the second engaging tooth part (212).

8. The utility knife according to claim 2, characterized in that, The first elastic structure (320) and the second elastic structure (330) are located on the same side in the second direction and can be engaged with the first meshing tooth (211). The first elastic structure (320) and the second elastic structure (330) are spaced apart in the third direction, which is perpendicular to the first direction and the second direction.

9. The utility knife according to any one of claims 1-7, characterized in that, The sliding base (310) includes a push button seat (315) and a sliding seat (316). The push button seat (315) is provided with a snap-fit ​​member (317), and the sliding seat (316) is provided with a snap-fit ​​hole (318). The snap-fit ​​member (317) can be inserted into and snapped into the snap-fit ​​hole (318). The first elastic structure (320) and the second elastic structure (330) are sandwiched between the push button seat (315) and the sliding seat (316).

10. The utility knife according to claim 9, characterized in that, The push button seat (315) is provided with a push button body (319), and the push button body (319) extends out of the knife shell (100) from the operation port (120).

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