Art knife

Abstract

The invention belongs to the technical field of manual tools, and discloses an art knife which comprises a knife shell, a knife path, a pushing mechanism and a blade. A telescopic port is formed in one end of the knife shell in the first direction, and an operation port is formed in one side of the knife shell in the second direction. The tool path is arranged in the tool shell and provided with a plurality of first meshing tooth parts, and the first meshing tooth parts are arranged on the side, in the second direction, of the tool path. The pushing mechanism comprises a sliding base and a first elastic structure, the sliding base is movably arranged in the tool path in the first direction, and the first elastic structure comprises an elastic clamping head and a spring which are connected with each other; the sliding base is provided with a containing groove, the spring is arranged in the containing groove, and the elastic clamping head can stretch out of the containing groove and is meshed with the first meshing tooth part. The elastic clamping head can further retract into the containing groove to be separated from the first meshing tooth part. The blade is arranged in the tool path and connected to the sliding base, and the pushing mechanism can push the blade to stretch out and draw back relative to the telescopic through opening. The art knife can have left and right hand universality, the use reliability can be improved, and the service life can be prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of manual tools, and in particular to a utility knife. Background Art

[0002] The outer shell and the blade of the utility knife are of a pull-out structure, and the blade can extend or retract relative to the outer shell. The push-twist position and width of the traditional utility knife are only designed according to the usage habits of users with the right hand as the dominant hand, which is not very user-friendly for users with the left hand as the dominant hand. Moreover, the distance between the push button position of the traditional utility knife and the blade is relatively close, and there is a risk of being scratched by the blade.

[0003] In the prior art, there is a side-push type utility knife in which the push button is provided on the outer shell and located at the side ridge of the outer shell, realizing an operation method that is universal for both left and right hands. However, in the side-push type utility knife in the prior art, generally only a deformed elastic piece is used to achieve separable engagement with the meshing tooth portion on the knife rail, and thus the positioning or unlocking of the position of the blade on the knife rail is realized.

[0004] The above-mentioned solution that only uses a deformed elastic piece will have problems such as fatigue with the frequent use of the utility knife, and the reliability is insufficient.

[0005] Therefore, there is an urgent need for a utility knife to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a utility knife, which can be universal for both left and right hands, and can improve the reliability and service life of use.

[0007] To achieve this purpose, the present invention adopts the following technical solutions:

[0008] A utility knife, comprising:

[0009] A knife shell, with a telescopic through-hole opened at one end in the first direction, and an operation through-hole opened at one side in the second direction;

[0010] A knife rail, arranged in the knife shell, the knife rail is provided with a plurality of first meshing tooth portions, the first meshing tooth portions are arranged on one side of the knife rail in the second direction, and the plurality of first meshing tooth portions are arranged in an extending arrangement along the first direction;

[0011] A pushing mechanism, including a sliding base and a first elastic structure, the sliding base is movably arranged in the knife rail along the first direction, and a part of it extends out of the operation through-hole, the first elastic structure includes an elastic chuck and a spring connected to each other; the sliding base is provided with a receiving groove, the spring is arranged in the receiving groove, and the elastic chuck can extend out of the receiving groove and engage with the first meshing tooth portion; the elastic chuck can also retract into the receiving groove to disengage from the first meshing tooth portion;

[0012] The blade is disposed in the blade rail and connected to the sliding base. The pushing mechanism can push the blade to expand and contract relative to the telescopic opening.

[0013] The first direction is parallel to the extending direction of the blade, and the second direction is perpendicular to the first direction and parallel to the width direction of the blade.

[0014] As a preferred solution of the utility knife provided by the present invention, the plane where the surface of the first engaging tooth portion is located is perpendicular to the plane where the side surface of the blade is located. The first engaging tooth portion has a notch, and the notch is arranged facing the elastic chuck. When the elastic chuck engages with the first engaging tooth portion, the elastic chuck penetrates through the notch.

[0015] As a preferred solution of the utility knife provided by the present invention, the sliding base is provided with a pushing portion, and a pushing groove is formed in the pushing portion. The elastic chuck extends into the pushing groove. The opposite sides of the pushing groove in the first direction respectively form a first pushing surface and a second pushing surface. When the sliding base reciprocates in the first direction, it can drive the first pushing surface or the second pushing surface to push the elastic chuck to retract into the receiving groove respectively.

[0016] As a preferred solution of the utility knife provided by the present invention, the pushing mechanism further includes a second elastic structure. The blade rail is further provided with a plurality of second engaging tooth portions, and the plurality of second engaging tooth portions are arranged extending in the first direction. The second engaging tooth portions are arranged on the other side of the blade rail in the second direction. When the first elastic structure engages with the first engaging tooth portion, the second elastic structure can also engage with the second engaging tooth portions synchronously.

[0017] As a preferred solution of the utility knife provided by the present invention, the plane where the second engaging tooth portion is located is parallel to the plane where the side surface of the blade is located. The second engaging tooth portion has a notch, and the notch is arranged facing the second elastic structure.

[0018] As a preferred solution of the utility knife provided by the present invention, the second elastic structure is in a V-shaped structure, including an engaging and clamping portion and two elastic supporting portions. The two elastic supporting portions are located on both sides of the engaging and clamping portion and are movably mounted on the sliding base. The engaging and clamping portion can engage with the second engaging tooth portion under the support of the elastic supporting portions. At this time, the elastic supporting portions penetrate through the notch, and the elastic supporting portions can be deformed under the drive of the movement of the sliding base in the first direction, so that the engaging and clamping portion disengages from the second engaging tooth portion.

[0019] As a preferred embodiment of the utility knife provided by the present invention, a abutting beam is provided on the sliding base, the abutting beam is arranged parallel to the first direction and is located between the second elastic structure and the first elastic structure;

[0020] The second elastic structure includes an abutting portion, the abutting portion is located at the end of the second elastic structure, and the abutting portion can abut against one side of the abutting beam.

[0021] As a preferred embodiment of the utility knife provided by the present invention, the pushing mechanism further includes a second elastic structure, the first elastic structure and the second elastic structure are on the same side in the second direction, and the second elastic structure and the first elastic structure are arranged at intervals in the third direction, and both the first elastic structure and the second elastic structure can be meshed and connected to the first meshing tooth portion, and the third direction is perpendicular to the first direction and the second direction.

[0022] As a preferred embodiment of the utility knife provided by the present invention, the sliding base includes a push button seat and a sliding seat, the push button seat is provided with a clamping member, the sliding seat is provided with a clamping hole, and the clamping member can be inserted and clamped in the clamping hole; the first elastic structure is clamped between the push button seat and the sliding seat.

[0023] As a preferred embodiment of the utility knife provided by the present invention, a push button body is provided on the push button seat, and the push button body extends out of the knife shell from the operation through hole.

[0024] The beneficial effects of the present invention:

[0025] The utility knife provided by the present invention includes a knife shell, a knife rail, a pushing mechanism and a blade. One end of the knife shell in the first direction is provided with a telescopic through hole, and one side in the second direction is provided with an operation through hole. The knife rail is provided with a plurality of first meshing tooth portions, the first meshing tooth portions are arranged on one side of the knife rail in the second direction, and the plurality of first meshing tooth portions extend and are arranged along the first direction. The blade is arranged in the knife rail and is connected to the sliding base, and the pushing mechanism can push the blade to telescopically move relative to the telescopic through hole. 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. Through the above-mentioned knife shell, the components arranged inside it can be protected, the structural integrity of the utility knife can be improved, and the user's hand and the blade can be separated to avoid scratching. By setting the contact position between the user and the pushing mechanism on the side ridge of the knife shell in the second direction, the left and right hands can be used interchangeably, and the applicable range is wide.

[0026] The pushing mechanism includes a sliding base and a first elastic structure. The sliding base is movably arranged in the tool path along a first direction, and a part of it extends out of the operation opening. The first elastic structure includes an elastic chuck and a spring that are connected to each other. The sliding base is provided with a receiving groove, the spring is arranged in the receiving groove, and the elastic chuck can extend out of the receiving groove and engage with the first engaging tooth part. The elastic chuck can also retract into the receiving groove to disengage from the first engaging tooth part. Compared with only using the deformed elastic piece to position the blade in the prior art, through the above setting of the first elastic structure, the reliability of blade positioning can be improved, and further the reliability and service life of the utility knife can be enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present invention and these drawings.

[0028] Figure 1 is a schematic structural diagram of a utility knife provided in Embodiment 1 of the present invention Figure 1 ;

[0029] Figure 2 is a schematic structural diagram of a utility knife provided in Embodiment 1 of the present invention Figure 2 ;

[0030] Figure 3 is a top view of the utility knife provided in Embodiment 1 of the present invention;

[0031] Figure 4 is a partial structural schematic diagram of the utility knife provided in Embodiment 1 of the present invention;

[0032] Figure 5 is a schematic structural diagram of the pushing mechanism provided in Embodiment 1 of the present invention;

[0033] Figure 6 is a partial structural schematic diagram of the pushing mechanism provided in Embodiment 1 of the present invention Figure 1 ;

[0034] Figure 7 is a partial structural schematic diagram of the pushing mechanism provided in Embodiment 1 of the present invention Figure 2 ;

[0035] Figure 8 is a partial structural schematic diagram of a utility knife provided in Embodiment 2 of the present invention;

[0036] Figure 9 is Figure 8 a partial enlarged view of the structure marked A in

[0037] Figure 10 It is a partial structural schematic diagram of the first elastic structure and the second elastic structure provided in the second embodiment of the present invention;

[0038] Figure 11 It is a partial structural schematic diagram of the driving mechanism provided in the second embodiment of the present invention;

[0039] Figure 12 It is a partial structural schematic diagram of the utility knife provided in the third embodiment of the present invention.

[0040] In the figure:

[0041] 100, knife shell; 110, telescopic through port; 120, operation through port; 130, push button receiving groove;

[0042] 200, knife rail; 210, first engagement tooth portion; 220, second engagement tooth portion;

[0043] 300, driving mechanism; 310, sliding base; 311, receiving groove; 312, pushing portion; 313, first pushing surface; 314, second pushing surface; 315, push button seat; 316, sliding seat; 3161, connecting column; 3162, support leg; 3163, first positioning portion; 3164, second positioning portion; 3165, abutting beam; 317, clamping member; 318, clamping hole; 319, push button body; 320, first elastic structure; 321, elastic clamping head; 322, spring; 330, second elastic structure; 331, engagement and clamping portion; 332, elastic support portion; 333, abutting portion;

[0044] 400, blade;

[0045] 500, breaker; 510, breaker gap. Detailed implementation manners

[0046] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and through specific implementation manners.

[0047] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0048] Accordingly, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0049] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0050] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0051] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "connected", "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In this embodiment, the term "meshing" is expressed as cooperation.

[0052] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

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

[0054] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0055] Embodiment 1

[0056] Figure 1 Showing the structural schematic diagram of the utility knife provided by Embodiment 1 of the present invention Figure 1 ; Figure 2 Showing the structural schematic diagram of the utility knife provided by Embodiment 1 of the present invention Figure 2 ; Figure 3 Showing the top view of the utility knife provided by Embodiment 1 of the present invention; Figure 4 Showing the partial structural schematic diagram of the utility knife provided by Embodiment 1 of the present invention; Figure 5 Showing the structural schematic diagram of the pushing mechanism provided by Embodiment 1 of the present invention. Referring to Figures 1 - 5 In this embodiment, a utility knife is provided. The utility knife includes a knife shell 100, a knife rail 200, a pushing mechanism 300, and a blade 400.

[0057] Specifically, one end of the knife shell 100 in the first direction is provided with a telescopic through-hole 110, and one side in the second direction is provided with an operation through-hole 120. The knife rail 200 is disposed in the knife shell 100, and the blade 400 is disposed in the knife rail 200 and can move along the first direction to telescopically relative to the telescopic through-hole 110. Through the above-mentioned knife shell 100, it is possible to protect the components disposed inside it, improve the structural integrity of the utility knife, and separate the user's hand from the blade 400 to avoid scratching.

[0058] More specifically, continuing to refer to Figures 1 - 3 , the utility knife further includes a breaker 500. The breaker 500 is detachably connected to one end of the knife shell 100 away from the telescopic through-hole 110 by means of a quick-release plug-in connection or the like. The breaker 500 is provided with a breaker gap 510. A part of the blade 400 is inserted into the breaker gap 510, and then the blade 400 is bent to break the defective part of the blade 400.

[0059] More specifically, the pushing mechanism 300 includes a sliding base 310 and a first elastic structure 320. The sliding base 310 is movably disposed in the tool path 200 along a first direction. The blade 400 is connected to the sliding base 310, and a part of the sliding base 310 extends out of the operation through-hole 120 to serve as the contact position for the user.

[0060] More specifically, a plurality of first engaging teeth 210 are provided on one side of the tool path 200 in a second direction. The plurality of first engaging teeth 210 are arranged in an extension along the first direction. Here, "a plurality of first engaging teeth 210 are provided on one side of the tool path 200 in a second direction" can also be understood as the first engaging teeth 210 are provided on one side in the width direction of the utility knife. The first elastic structure 320 is connected to the sliding base 310 and can be engaged and clamped with the first engaging teeth 210, and can also disengage from the first engaging teeth 210 along with the sliding of the sliding base 310 in the first direction. By setting the contact position between the user and the pushing mechanism 300 on the side ridge of the knife shell 100 in the second direction, the universality of both left and right hands can be achieved, and the applicable range is wide.

[0061] 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.

[0062] Figure 6 Partial structural schematic diagram of the pushing mechanism provided in the first embodiment of the present invention Figure 1 ; Figure 7 Partial structural schematic diagram of the pushing mechanism provided in the first embodiment of the present invention Figure 2 . Refer to Figures 5 - 7 , the sliding base 310 includes a push button seat 315 and a sliding seat 316. The push button seat 315 is provided with a clamping member 317, and the sliding seat 316 is provided with a clamping hole 318. The clamping member 317 can be inserted and clamped in the clamping hole 318. In this embodiment, there are four clamping members 317, and the four clamping members 317 are arranged in a rectangular array. There are also four clamping holes 318, and the clamping members 317 and the clamping holes 318 correspond to each other and are connected to each other.

[0063] In other embodiments, the push button seat 315 and the sliding seat 316 can also be formed in an inseparable manner such as integrally formed.

[0064] Specifically, a push button body 319 is provided on the top of the push button seat 315 in the second direction. The push button body 319 extends out of the knife shell 100 from the operation through-hole 120. The push button body 319 can serve as the contact position for the user.

[0065] Specifically, the push button body 319 is symmetrically structured in the third direction. In this embodiment, the third direction is perpendicular to the first and second directions, that is to say, the third direction is perpendicular to the plane where the blade 400 is located, which is the thickness direction of the utility knife. Through the above settings, it is not only convenient for users with their right hand as the dominant hand to use, but also convenient for users with their left hand as the dominant hand to use, making the utility knife universal for both left and right hands.

[0066] More specifically, the side ridge of the knife shell 100 is provided with a push button receiving groove 130 along the first direction. The operation through hole 120 is opened at the bottom of the push button receiving groove 130. The push button body 319 can be received in the push button receiving groove 130 and can slide in the push button receiving groove 130. Through the push button receiving groove 130, the movement of the push button body 319 can be limited, ensuring the smoothness of the telescopic movement of the blade 400.

[0067] Continue to refer to Figure 4 and Figure 6 , a connecting post 3161 is provided on the sliding seat 316. The blade 400 is provided with a connecting hole, and the connecting post 3161 passes through the connecting hole. Through the cooperation of the above connecting post 3161 and the connecting hole, a reliable connection between the blade 400 and the sliding seat 316 can be achieved, and it is convenient to replace the blade 400.

[0068] Specifically, a support foot 3162 is provided at the bottom of the sliding seat 316. The support foot 3162 can abut against the corresponding inner wall of the accommodation space formed by the knife rail 200, thereby improving the stability of the sliding seat 316 when it moves.

[0069] 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 accommodation space formed by the knife rail 200 is designed with an arc transition, so as to minimize the friction between the support foot 3162 and the inner wall of the accommodation space on the basis of ensuring the support performance.

[0070] Continue to refer to Figures 4 - 7 , the sliding seat 316 is provided with a receiving groove 311. The first elastic structure 320 includes an elastic chuck 321 and a spring 322 that are connected to each other. The spring 322 is disposed in the receiving groove 311. The elastic chuck 321 can extend out of the receiving groove 311 and engage with the first engaging tooth portion 210; the elastic chuck 321 can also retract into the receiving groove 311 to disengage from the first engaging tooth portion 210. Compared with the prior art method of only using a deformed elastic piece for limiting, through the cooperation of the above elastic chuck 321 and spring 322, the structural reliability of the first elastic structure 320 can be improved, thereby improving the reliability of the blade 400 positioning, and further improving the reliability and service life of the utility knife.

[0071] In this embodiment, the plane where the surface of the first meshing tooth portion 210 is located is perpendicular to the plane where the side surface of the blade 400 is located. The first meshing tooth portion 210 has a notch, and the notch is arranged facing the elastic chuck 321. When the elastic chuck 321 meshes with the first meshing tooth portion 210, the elastic chuck 321 penetrates through the notch.

[0072] Optionally, in other embodiments, the plane where the surface of the first meshing tooth portion 210 is located may also be parallel to the plane where the side surface of the blade 400 is located, as long as the meshing and positioning function of the elastic chuck 321 can be achieved.

[0073] Continue to refer to Figure 4 , the pushing mechanism 300 further includes a second elastic structure 330. The tool rail 200 is further provided with a plurality of second meshing tooth portions 220, and the plurality of second meshing tooth portions 220 are arranged in an extending manner along the first direction. The second meshing tooth portions 220 are arranged on the other side of the tool rail 200 in the second direction. The first elastic structure 320 and the second elastic structure 330 are oppositely arranged in the second direction. When the first elastic structure 320 meshes with the first meshing tooth portion 210, the second elastic structure 330 can also mesh with the second meshing tooth portion 220 synchronously.

[0074] In this embodiment, the plane where the second meshing tooth portion 220 is located is parallel to the plane where the side surface of the blade 400 is located. The second meshing tooth portion 220 also has a notch, and the notch is arranged facing the second elastic structure 330.

[0075] Specifically, the second elastic structure 330 is in a V-shaped structure, including a meshing and clamping portion 331 and two elastic supporting portions 332. The two elastic supporting portions 332 are located on both sides of the meshing and clamping portion 331 and are movably installed on the sliding seat 316. The meshing and clamping portion 331 can mesh with the second meshing tooth portion 220 under the support of the elastic supporting portions 332. At this time, the elastic supporting portions 332 penetrate through the notch of the second meshing tooth portion 220, and the elastic supporting portions 332 can be deformed under the drive of the movement of the sliding base 310 along the first direction, so that the meshing and clamping portion 331 disengages from the second meshing tooth portion 220.

[0076] Specifically, a abutting beam 3165 is provided on the sliding seat 316. The abutting beam 3165 is arranged parallel to the first direction and is located between the second elastic structure 330 and the first elastic structure 320. The second elastic structure 330 further includes two abutting parts 333 which are arranged at one end of the elastic support part 332 away from the meshing and clamping part 331. The abutting parts 333 can abut against one side of the abutting beam 3165. A first positioning part 3163 and a second positioning part 3164 are also provided on the sliding seat 316. The first positioning part 3163 and the second positioning part 3164 are located on one side of the abutting beam 3165 away from the first elastic structure 320, and the first positioning part 3163 and the second positioning part 3164 are arranged at intervals in the first direction. The second elastic structure 330 is clamped between the first positioning part 3163 and the second positioning part 3164, and the two elastic support parts 332 respectively abut against the first positioning part 3163 and the second positioning part 3164.

[0077] Preferably, the meshing and clamping part 331 has an arc structure to facilitate the meshing and disengagement with the second meshing tooth part 220.

[0078] Continue to refer to Figure 5 and Figure 7 The push button seat 315 is provided with a pushing part 312 which forms a pushing groove. The elastic chuck 321 can extend into the pushing groove. The opposite sides of the pushing groove in the first direction respectively form a first pushing surface 313 and a second pushing surface 314. The sliding base 310 reciprocates in the first direction, which can drive the first pushing surface 313 or the second pushing surface 314 to push the elastic chuck 321 to retract into the receiving groove 311 in the second direction.

[0079] When the user controls the sliding base 310 and the blade 400 to move towards the direction close to the telescopic opening 110 through the push button body 319, the first pushing surface 313 pushes the elastic chuck 321 to push the elastic chuck 321 to retract into the receiving groove 311, disengaging from the first meshing tooth part 210 to achieve unlocking. When the extending length of the blade 400 meets the requirements, the pushing of the push button body 319 is stopped. At this time, the elastic chuck 321 extends out of the receiving groove 311 under the action of the spring 322 and is meshed and positioned on the first meshing tooth part 210 to achieve locking.

[0080] When the user controls the sliding base 310 and the blade 400 to move away from the telescopic opening 110 through the push button body 319, the second abutting surface 314 abuts against the elastic chuck 321, pushing the elastic chuck 321 into the retracted receiving groove 311 and disengaging from the first engaging tooth portion 210 to achieve unlocking. When the blade 400 is completely retracted into the telescopic opening 110, the pushing of the push button body 319 stops. At this time, the elastic chuck 321 extends out of the receiving groove 311 under the action of the spring 322 and engages and positions at the first engaging tooth portion 210 to achieve locking.

[0081] During the process of the user controlling the movement of the sliding base 310 and the blade 400 through the push button body 319, the elastic support portion 332 deforms, and the engaging and clamping portion 331 disengages from the second engaging tooth portion 220 to achieve unlocking. When the sliding base 310 and the blade 400 stop moving, the engaging and clamping portion 331 can engage again with the second engaging tooth portion 220 under the action of the elastic support portion 332 to achieve locking.

[0082] Embodiment 2

[0083] This embodiment provides a utility knife.

[0084] Figure 8 Partial structural schematic diagram showing a utility knife provided by Embodiment 2 of the present invention Figure 1 ; Figure 9 Showing Figure 8 Partial enlarged view of the structure marked A in Figure 10 Partial structural schematic diagram showing the first elastic structure and the second elastic structure provided by Embodiment 2 of the present invention; Figure 11 Partial structural schematic diagram showing the pushing mechanism provided by Embodiment 2 of the present invention. Refer to Figures 8 - 11 , the difference between this embodiment and Embodiment 1 is that in a utility knife provided in this embodiment, the knife rail 200 is only provided with the first engaging tooth portion 210, the first elastic structure 320 and the second elastic structure 330 are on the same side in the second direction, and the second elastic structure 330 and the first elastic structure 320 are arranged at intervals in the third direction. The first elastic structure 320 and the second elastic structure 330 can both be engaged and connected to the first engaging tooth portion 210. The third direction is perpendicular to the first direction and the second direction. In this embodiment, the specific structure of the second elastic structure 330 Figure 4 the second elastic structure in, will not be elaborated here.

[0085] When the user controls the sliding base 310 and the blade 400 to move in the direction close to the telescopic opening 110 through the push button body 319, the first pushing surface 313 pushes the elastic chuck 321, pushing the elastic chuck 321 into the retracted receiving groove 311, disengaging from the first meshing tooth portion 210, and achieving unlocking. When the extended length of the blade 400 meets the requirements, the pushing of the push button body 319 is stopped. At this time, the elastic chuck 321 extends out of the receiving groove 311 under the action of the spring 322 and meshes and is positioned at the first meshing tooth portion 210 to achieve locking.

[0086] When the user controls the sliding base 310 and the blade 400 to move in the direction away from the telescopic opening 110 through the push button body 319, the second pushing surface 314 pushes the elastic chuck 321, pushing the elastic chuck 321 into the retracted receiving groove 311, disengaging from the first meshing tooth portion 210, and achieving unlocking. When the blade 400 is completely retracted into the telescopic opening 110, the pushing of the push button body 319 is stopped. At this time, the elastic chuck 321 extends out of the receiving groove 311 under the action of the spring 322 and meshes and is positioned at the first meshing tooth portion 210 to achieve locking.

[0087] During the process of the user controlling the movement of the sliding base 310 and the blade 400 through the push button body 319, the elastic support portion 332 deforms, and the meshing and clamping portion 331 disengages from the first meshing tooth portion 210 to achieve unlocking. When the sliding base 310 and the blade 400 stop moving, the meshing and clamping portion 331 can be meshed again to the corresponding first meshing tooth portion 210 under the action of the elastic support portion 332.

[0088] Embodiment III

[0089] Figure 12 Shows a partial structural schematic diagram of the utility knife provided in Embodiment III of the present invention. Refer to Figure 12 In another utility knife provided in this embodiment, the first meshing tooth portion 210 and the second meshing tooth portion 220 are respectively arranged on both sides of the knife rail 200 in the second direction. There are two second elastic structures 330. One of the second elastic structures 330 and the first elastic structure 320 are arranged opposite to each other in the second direction, and the other second elastic structure 330 and the first elastic structure 320 are arranged on the same side of the knife rail 200 in the second direction. The two second elastic structures 330 are respectively meshingly connected to the first meshing tooth portion 210 and the second meshing tooth portion 220. Through the above arrangement, the positioning of the pushing mechanism 300 on the knife rail 200 can be made more reliable.

[0090] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A utility knife, characterized in that, Comprising: A knife housing (100) with a telescopic through-opening (110) formed at one end in a first direction and an operation through-opening (120) formed at one side in a second direction; A knife rail (200) disposed in the knife housing (100), the knife rail (200) being provided with a plurality of first engaging tooth portions (210), the first engaging tooth portions (210) being disposed at one side of the knife rail (200) in the second direction, and the plurality of first engaging tooth portions (210) being arranged to extend in the first direction; A pushing mechanism (300) including a sliding base (310) and a first elastic structure (320), the sliding base (310) being movably disposed in the knife rail (200) along the first direction, with a part thereof protruding out of the operation through-opening (120), the first elastic structure (320) including an elastic chuck (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), and the elastic chuck (321) can protrude out of the receiving groove (311) and engage with the first engaging tooth portion (210); the elastic chuck (321) can also retract into the receiving groove (311) to disengage from the first engaging tooth portion (210); A blade (400) disposed in the knife rail (200) and connected to the sliding base (310), the pushing mechanism (300) being capable of pushing the blade (400) to telescopically move relative to the telescopic through-opening (110); The first direction is parallel to the extending 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, wherein, The plane where the surface of the first engaging tooth portion (210) is located is perpendicular to the plane where the side surface of the blade (400) is located, the first engaging tooth portion (210) has a notch, the notch is arranged facing the elastic chuck (321), and when the elastic chuck (321) engages with the first engaging tooth portion (210), the elastic chuck (321) penetrates through the notch.

3. The utility knife according to claim 1, characterized in that, The sliding base (310) is provided with a pushing portion (312), the pushing portion (312) is formed with a pushing groove, the elastic chuck (321) extends into the pushing groove, and opposite sides of the pushing groove in the first direction respectively form a first pushing surface (313) and a second pushing surface (314), and the sliding base (310) reciprocally moves in the first direction, capable of respectively driving the first pushing surface (313) or the second pushing surface (314) to push the elastic chuck (321) to retract into the receiving groove (311).

4. The utility knife according to any one of claims 1-3, characterized in that, The driving mechanism (300) further includes a second elastic structure (330). The tool path (200) is further provided with a plurality of second meshing tooth portions (220). The plurality of second meshing tooth portions (220) are arranged in an extending manner along a first direction. The second meshing tooth portions (220) are arranged on the other side of the tool path (200) in a second direction. When the first elastic structure (320) meshes with the first meshing tooth portion (210), the second elastic structure (330) can also mesh with the second meshing tooth portions (220) synchronously.

5. The utility knife according to claim 4, characterized in that, The plane where the second meshing tooth portions (220) are located is arranged parallel to the plane where the side surface of the blade (400) is located. The second meshing tooth portions (220) have notches, and the notches are arranged facing the second elastic structure (330).

6. The utility knife according to claim 5, wherein The second elastic structure (330) is in a V-shaped structure, including a meshing and clamping portion (331) and two elastic support portions (332). The two elastic support portions (332) are located on both sides of the meshing and clamping portion (331) and are movably installed on the sliding base (310). The meshing and clamping portion (331) can mesh with the second meshing tooth portions (220) under the support of the elastic support portions (332). At this time, the elastic support portions (332) penetrate through the notches, and the elastic support portions (332) can be deformed under the drive of the movement of the sliding base (310) along the first direction, so that the meshing and clamping portion (331) disengages from the second meshing tooth portions (220).

7. The utility knife according to claim 4, characterized in that, A abutting beam (3165) is arranged on the sliding base (310). The abutting beam (3165) is arranged parallel to the first direction and is located between the second elastic structure (330) and the first elastic structure (320); The second elastic structure (330) includes an abutting portion (333). The abutting portion (333) is located at the end of the second elastic structure (330), and the abutting portion (333) can abut against one side of the abutting beam (3165).

8. The utility knife according to any one of claims 1-3, characterized in that, The driving mechanism (300) further includes a second elastic structure (330). The first elastic structure (320) and the second elastic structure (330) are on the same side in the second direction, and the second elastic structure (330) and the first elastic structure (320) are arranged at intervals along a third direction. The third direction is perpendicular to the first direction and the second direction. Both the first elastic structure (320) and the second elastic structure (330) can be meshed and connected to the first meshing tooth portion (210).

9. The utility knife according to claim 1, 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 clamping member (317). The sliding seat (316) is provided with a clamping hole (318). The clamping member (317) can be inserted and clamped in the clamping hole (318); the first elastic structure (320) is clamped between the push button seat (315) and the sliding seat (316).

10. The utility knife according to claim 9, characterized in that, A push button body (319) is provided on the push button base (315), and the push button body (319) extends out of the knife housing (100) from the operation through port (120).

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