Art knife

Abstract

The utility model provides an art knife. The art knife comprises a shell, a push button and a blade. A cavity is formed in the shell, an opening is formed in the surface of the shell, the cavity is communicated with the outside through the opening, and an end groove is formed in one end of the shell. The push button is arranged in the opening in a sliding mode and extends into the cavity, and the push button is provided with a positioning column. The blade is provided with a positioning hole. The blade penetrates through the end groove to be connected to the push button. The positioning column is connected to the positioning hole. The positioning column of the push button is separated from the positioning hole of the blade under the action of external force, so that the blade is replaced after being separated from the end groove of the cover body. The positioning column of the push button is pressed downwards through external force, so that the positioning hole of the blade is separated from the positioning hole, and the blade can be replaced from the front end of the art knife.

Description

Technical Field

[0001] The present application relates to the field of stationery, and in particular to a utility knife. Background Art

[0002] Utility knife, also known as carving knife or wallpaper knife, is a kind of knife used for art and handicrafts. It is mainly used to cut soft things. Most of them are made of plastic handle and blade, which is a pull-out structure. There are also a few with metal handles. The blade is mostly beveled and thin. It can be broken along the line of the blade when blunt, and a new blade will appear, which is convenient for use.

[0003] When a utility knife is used normally, only the tip of the knife is used, and cutting, carving, and dotting are the main functions. However, the blade of this kind of knife is very brittle, and the blade cannot be extended too long when used, and the blade is also easy to break, so the blade needs to be replaced frequently.

[0004] In the prior art, when replacing the blade of a utility knife, the back cover at the rear end of the utility knife needs to be removed, and the blade and the push button need to be removed from the rear end of the utility knife before replacing the new blade. The above method of replacing the blade from the rear end of the utility knife is complicated to operate, and a detachable back cover needs to be designed, so that the utility knife has more components, which is not conducive to reducing costs and improving efficiency. Utility Model Content

[0005] The main purpose of the present application is to overcome at least one defect of the above-mentioned prior art and to provide a utility knife with a blade that can be replaced from the front end, which is easy to operate and has a simple structure.

[0006] To achieve the above objectives, this application adopts the following technical solutions:

[0007] According to one aspect of the present application, a utility knife is provided, which includes a shell, a push button and a blade. The shell has a cavity inside, the shell surface has an opening, the cavity is connected to the outside through the opening, and one end of the shell has an end slot. The push button is slidably arranged in the opening and extends into the cavity, and the push button has a positioning column. The blade has a positioning hole. The blade is connected to the push button through the end slot, and the positioning column is connected to the positioning hole; the positioning column of the push button is disengaged from the positioning hole of the blade under the action of external force, so that the blade is disengaged from the end slot of the cover body and can be replaced.

[0008] According to one embodiment of the present application, the shell includes a first shell and a second shell. The first shell includes a cover surface and a first side wall extending from the four sides of the cover surface in a direction perpendicular to the cover surface, and the opening is provided on the cover surface. The second shell includes a bottom surface and a second side wall extending from the four sides of the bottom surface in a direction perpendicular to the bottom surface. An end of the first side wall away from the cover surface and an end of the second side wall away from the bottom surface are butted against each other to form the cavity and the end groove.

[0009] According to one embodiment of the present application, the second housing further comprises a positioning groove and at least two supporting plates. The positioning groove is arranged at a portion of the bottom surface close to the end groove. At least two supporting plates extend from the second side wall to the positioning groove and are located between the positioning groove and the end groove.

[0010] According to one embodiment of the present application, the push button includes a first plate, a second plate and a connecting rib. The surface of the first plate facing away from the positioning column is provided with a hand-pushing portion. The positioning column is provided on a portion of the second plate facing the first plate and close to the blade, and the distance between the top surface of the positioning column and the surface of the first plate facing the positioning column is greater than the thickness of the blade. The connecting rib connects the first plate and the second plate at portions away from the blade.

[0011] According to one of the embodiments of the present application, a limiting plate is further provided at a position of the cover surface of the first shell facing the supporting plate.

[0012] According to one of the embodiments of the present application, a positioning block is provided on the surface of the second plate facing away from the positioning column, and the positioning block can slide along the bottom surface of the second shell and cooperate with the positioning groove.

[0013] According to one embodiment of the present application, the push button also includes at least one elastic structure, which is arranged on the second plate and elastically contacts the bottom surface of the second shell, and on the bottom surface of the second shell, the projection of the elastic structure is staggered with the projection of the positioning block.

[0014] According to one embodiment of the present application, the minimum value of the distance between the elastic structure and the surface of the first plate facing the positioning post is greater than or equal to the distance between two opposite surfaces of the first plate and the second plate.

[0015] According to one embodiment of the present application, the elastic structure is in an arch shape, and there are at least two of them, both ends of the arch contact the bottom surface of the second shell, and the middle part of the arch is fixed to the second plate.

[0016] According to one of the embodiments of the present application, an extending direction of the arch is the same as an extending direction of the positioning block.

[0017] It can be seen from the above technical solution that the advantages and positive effects of the utility knife proposed in this application are:

[0018] The utility knife proposed in the present application includes a shell, a push button and a blade. There is no need to design a back cover, which reduces the components of the utility knife, simplifies the structure and reduces the cost. The shell has a cavity inside, the shell surface has an opening, the cavity is connected to the outside through the opening, and one end of the shell has an end slot. The push button is slidably arranged in the opening and extends into the cavity, and the push button has a positioning column. The blade has a positioning hole. The blade passes through the end slot and is connected to the push button, and the positioning column is connected to the positioning hole; the positioning column of the push button is separated from the positioning hole of the blade under the action of external force, so that the blade is separated from the end slot of the cover body and then replaced. The push button is pressed by external force to separate the positioning column of the push button and the positioning hole of the blade, so that the blade can be pulled out from the end slot at the front end of the utility knife and replaced with a new blade, without the need to disassemble the back cover and other operations, and the replacement action is simple, which is conducive to improving the replacement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Various objects, features and advantages of the present application will become more apparent by considering the following detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. The accompanying drawings are merely exemplary illustrations of the present application and are not necessarily drawn to scale. In the accompanying drawings, the same reference numerals always represent the same or similar parts. Among them:

[0020] Figure 1 It is a structural schematic diagram of the utility knife of the present application.

[0021] Figure 2 yes Figure 1 Schematic diagram of the internal structure of the utility knife after cutting along plane A.

[0022] Figure 3 yes Figure 1 Schematic diagram of the structure of the blade.

[0023] Figure 4 yes Figure 1 A schematic structural diagram of the first shell in FIG.

[0024] Figure 5 yes Figure 1 Schematic diagram of the structure of the second shell.

[0025] Figure 6 yes Figure 1 Schematic diagram of the structure of the push button in .

[0026] Figure 7 yes Figure 6 A schematic diagram of the structure from another angle.

[0027] The following are the descriptions of the reference numerals:

[0028] 1. Utility Knife

[0029] 100. Shell;

[0030] 101. Open your mouth;

[0031] 102. A first housing;

[0032] 1021. Covering;

[0033] 1022. First side wall;

[0034] 1023. Limiting piece;

[0035] 1024. Groove;

[0036] 103. Second shell;

[0037] 1031. Bottom surface;

[0038] 1032. Second side wall;

[0039] 1033. Positioning slot;

[0040] 1034. Support piece;

[0041] 104. End slot;

[0042] 200. Push button;

[0043] 201. Positioning column;

[0044] 202. First board;

[0045] 203. Hand push department;

[0046] 204. Second board;

[0047] 205. Connecting ribs;

[0048] 206. Positioning block;

[0049] 207. Elastic structure;

[0050] 208. bulge;

[0051] 300. Blade;

[0052] 301. Positioning hole;

[0053] A-cutting plane;

[0054] T-blade thickness;

[0055] D1 - the distance from the top surface of the positioning column to the surface of the first plate facing the positioning column;

[0056] D2-minimum value of the distance between the elastic structure and the surface of the first plate facing the positioning column;

[0057] D3 - the distance between the two opposing surfaces of the first plate and the second plate. DETAILED DESCRIPTION

[0058] Typical embodiments that embody the features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can have various changes in different embodiments without departing from the scope of the present application, and the descriptions and drawings therein are essentially for illustrative purposes rather than for limiting the present application.

[0059] In the following description of different exemplary embodiments of the present application, reference is made to the accompanying drawings, which form a part of the present application and in which different exemplary structures, systems and steps that can implement multiple aspects of the present application are shown by way of example. It should be understood that other specific schemes of components, structures, exemplary devices, systems and steps can be used, and structural and functional modifications can be made without departing from the scope of the present application. When introducing the elements / components / etc. described and / or illustrated herein, the terms "comprising", "including" and "having" are used to represent the meaning of open-ended inclusion and mean that in addition to the listed elements / components / etc., there may be additional elements / components / etc.

[0060] like Figures 1 to 3 As shown, Figure 2 yes Figure 1 The specific structure of the interior of the utility knife seen after cutting along the cutting plane A. The utility knife 1 of the present application includes a shell 100, a push button 200 and a blade 300. The shell 100 has a cavity inside, and the surface of the shell 100 has an opening 101. The cavity is connected to the outside through the opening 101, and one end of the shell 100 has an end slot 104. The push button 200 is slidably set in the opening 101 and extends into the cavity. The push button 200 has a positioning column 201. The blade 300 has a positioning hole 301. The blade 300 is connected to the push button 200 through the end slot 104, and the positioning column 201 is connected to the positioning hole 301; the positioning column 201 of the push button 200 is separated from the positioning hole 301 of the blade 300 under the action of external force, so that the blade 300 is separated from the end slot 104 of the cover body and replaced.

[0061] The utility knife 1 of the present application uses a positioning hole 301 and a positioning column 201 to realize the positioning of the blade 300, and the push button 200 can realize the positioning column 201 to move downward and disengage from the positioning hole 301 of the blade 300 under the action of an external force, thereby realizing the replacement of the blade 300 from the front end slot 104. In the present application, the direction in which the blade 300 extends is the front, and the direction in which the blade 300 retracts is the rear.

[0062] In this embodiment, if Figures 4 to 5 As shown, the housing 100 includes a first housing 102 and a second housing 103. The first housing 102 includes a cover surface 1021 and a first side wall 1022 extending from the periphery of the cover surface 1021 in a direction perpendicular to the cover surface 1021, and the opening 101 is arranged on the cover surface 1021. The second housing 103 includes a bottom surface 1031 and a second side wall 1032 extending from the periphery of the bottom surface 1031 in a direction perpendicular to the bottom surface 1031. An end of the first side wall 1022 away from the cover surface 1021 and an end of the second side wall 1032 away from the bottom surface 1031 are butted against each other to form a cavity and an end slot 104. The housing 100 is formed by the first housing 102 and the second housing 103 being buckled against each other, so as to provide a space for the blade 300 to move forward and backward, and to accommodate structures such as the push button 200, so as to realize the replacement of the blade 300 from the end slot 104 at the front end. In the present application, the cover surface 1021 of the first shell 102 is located at the top, and the bottom surface 1031 of the second shell 103 is located at the bottom.

[0063] In this embodiment, the second housing 103 further includes a positioning groove 1033 and at least two supporting pieces 1034. The positioning groove 1033 is provided at a portion of the bottom surface 1031 close to the end groove 104. At least two supporting pieces 1034 extend from the second side wall 1032 to the positioning groove 1033 and are located between the positioning groove 1033 and the end groove 104. The supporting pieces 1034 cooperate with the positioning groove 1033 to achieve that when the positioning block 206 of the push button 200 falls into the positioning groove 1033, the position of the blade 300 remains unchanged, thereby allowing the positioning hole 301 on the blade 300 to be separated from the positioning column 201 of the push button 200.

[0064] In this embodiment, a limiting piece 1023 is further provided at a position of the cover surface 1021 of the first housing 102 facing the supporting piece 1034 to limit the position of the blade 300 and prevent the blade 300 from floating upward.

[0065] In this embodiment, if Figure 6 to Figure 7As shown, the push button 200 includes a first plate 202, a second plate 204 and a connecting rib 205. The surface of the first plate 202 facing away from the positioning column 201 is provided with a hand-pushing portion 203. The portion of the second plate 204 facing the first plate 202 and close to the blade 300 is provided with the positioning column 201, and the distance D1 between the top surface of the positioning column 201 and the surface of the first plate 202 facing the positioning column 201 is greater than the thickness T of the blade 300. The connecting rib 205 connects the first plate 202 and the second plate 204 away from the blade 300. The push button 200 is formed by providing the connecting rib 205 between the two plates, which can improve the strength of the push button 200, extend the service life of the push button 200, and thus improve the service life of the utility knife 1. The distance between the top surface of the positioning column 201 and the surface of the first plate 202 facing the positioning column 201 is greater than the thickness of the blade 300, so that when the blade 300 is replaced, the old blade 300 can be pulled out from between the positioning column 201 and the first plate 202, and the new blade 300 can be pushed in from between the positioning column 201 and the first plate 202, thereby facilitating the replacement of the blade 300.

[0066] External force presses the hand push part 203 to make the positioning column 201 disengage from the positioning hole 301. The positioning column 201 is disengaged from the positioning hole 301 by external force pressing, which is easy and feasible to operate and is conducive to improving the replacement efficiency of the blade 300.

[0067] In this embodiment, a positioning block 206 is provided on the surface of the second plate 204 facing away from the positioning column 201, and the positioning block 206 can slide along the bottom surface 1031 of the second housing 103 and cooperate with the positioning groove 1033. The positioning block 206 cooperates with the positioning groove 1033, so that when the blade 300 is replaced, the push button 200 is pressed downward by an external force, so that after the positioning block 206 falls into the positioning groove 1033, the positioning column 201 of the push button 200 also moves downward to disengage from the positioning hole 301 of the blade 300, and the blade 300 can be replaced from the end groove 104, thereby realizing replacement of the blade 300 from the front end.

[0068] In this embodiment, the push button 200 further includes at least one elastic structure 207, which is disposed on the second plate 204 and elastically contacts the bottom surface 1031 of the second housing 103. On the bottom surface 1031 of the second housing 103, the projection of the elastic structure 207 is staggered with the projection of the positioning block 206. When the utility knife 1 is in normal working state, the elastic structure 207 can provide an upward force to embed the protrusion 208 of the push button 200 into the groove 1024 of the first housing 102 to fix the position of the blade 300; when the blade 300 is replaced, the upward force is still provided so that the positioning hole 301 of the replaced blade 300 can cooperate with the positioning column 201 after the external force disappears, thereby completing the replacement and installation of the blade 300.

[0069] The elastic structure 207 and the positioning block 206 are staggered to avoid mutual interference, so that the positioning block 206 can smoothly fall into the positioning groove 1033 when the blade 300 is replaced.

[0070] In this embodiment, the minimum value D2 of the distance between the elastic structure 207 and the surface of the first plate 202 facing the positioning column 201 is greater than or equal to the distance D3 between the two opposite surfaces of the first plate 202 and the second plate 204. Such a design enables the elastic structure 207 to play a greater elastic role, does not waste the elastic force of the elastic structure 207, ensures the strength of the elastic force provided by the elastic structure 207, and thus ensures the reliability of the overall structure.

[0071] In this embodiment, there are at least two elastic structures 207, and the elastic structures 207 are arched, with both ends of the arch contacting the bottom surface 1031 of the second housing 103, and the middle part of the arch fixed to the second plate 204. The two elastic structures 207 make the push button 200 more balanced and stable. The arched structure enables the elastic structure 207 to continuously provide upward elastic force for a long time, which is beneficial to the reliability of the normal working state of the utility knife 1 and the convenience of replacing the blade 300.

[0072] In this embodiment, the extending direction of the arch is the same as the extending direction of the positioning block 206. The same extending direction is conducive to reducing processing steps, simplifying the processing technology, improving productivity and reducing costs. In some other embodiments, the direction of the arch may also be different from the extending direction of the positioning block 206, as long as the elastic structure 207 and the positioning block 206 do not interfere with each other.

[0073] In this embodiment, when the protrusion 208 of the push button 200 is embedded in the groove 1024 of the first shell 102, the elastic structure 207 is still in a compressed state; that is, the overall height of the elastic structure 207 in the unstressed state is greater than the distance between the surface of the second plate 204 facing the second shell 103 and the bottom surface 1031 of the second shell 103.

[0074] In this exemplary embodiment, the utility knife proposed in this application is described by taking the stationery field as an example. It is easy for those skilled in the art to understand that in order to apply the relevant design of this application to other fields, various modifications, additions, substitutions, deletions or other changes are made to the following specific embodiments, and these changes are still within the scope of the principle of the utility knife proposed in this application.

[0075] It should be noted that the utility knives shown in the drawings and described in this specification are only a few examples of many types of utility knives that can adopt the principles of the present application. It should be clearly understood that the principles of the present application are by no means limited to any component of any detail of the utility knives shown in the drawings or described in this specification.

[0076] The above is a detailed description of several exemplary embodiments of the utility knife proposed in this application. The following is an exemplary description of the use process of the utility knife proposed in this application.

[0077] Combined with Figures 1 to 7 The use of the utility knife proposed in this application is divided into a normal use state and a blade replacement state.

[0078] Among them, the normal usage state is: the blade 300 is installed on the positioning column 201 of the push button 200 through the positioning hole 301, the push button 200 is set in the second shell 103, and the first shell 102 is installed so that the push button 200 is located in the opening 101 of the first shell 102. At this time, the elastic structure 207 at the bottom of the push button 200 is in a compressed state, giving the push button 200 an upward force, and the protrusion 208 next to the hand-push part 203 of the push button 200 engages with the groove 1024 of the first shell 102. The position of the blade 300 is fixed and the blade 300 can be used for cutting.

[0079] When it is necessary to adjust the length of the blade 300 extending out of the shell 100, an external force presses the push button 200 downward through the hand push portion 203. At this time, the elastic structure 207 at the bottom of the push button 200 is further compressed, and the protrusion 208 next to the hand push portion 203 of the push button 200 disengages from the groove 1024 of the first shell 102. The push button 200 can drive the blade 300 to slide back and forth along the length direction of the opening 101 of the shell 100, thereby adjusting the length of the blade 300 extending out of the shell 100.

[0080] In this normal use state, the sliding range of the push button 200 is the part of the opening 101 that avoids the positioning groove 1033 of the second housing 103. According to the usage habits, the sliding range of the push button 200 is mainly the part of the opening 101 away from the end groove 104, and the push button 200 is usually not slid to the position corresponding to the positioning groove 1033 of the second housing 103 in the opening 101. This is also more in line with daily usage habits. When the blade 300 is long, we usually adopt the above normal use state and sliding position.

[0081] The state of replacing the blade is: when the blade 300 is too short to be used and needs to be replaced, first push the push button 200 in the direction of the end groove 104. At this time, the push button 200 slides to the position in the opening 101 corresponding to the positioning groove 1033 of the second shell 103. When the positioning block 206 at the bottom of the push button 200 corresponds to the position of the positioning groove 1033 on the second shell 103, press the push button 200 hard so that the positioning block 206 of the push button 200 enters the positioning groove 1033 of the second shell 103. At this time, the distance between the second plate 204 of the push button 200 and the bottom surface 1031 of the second shell 103 is reduced, that is, the second plate 204 moves toward the bottom surface 1031 of the second shell 103, driving the positioning column 201 fixed on the second plate 204 to move toward the bottom surface 1031 of the second shell 103. Since the blade 300 is provided with a support piece 1034 on the second shell 103, it will not move toward the bottom surface 1031 of the second shell 103, so that the positioning hole 301 of the blade 300 is separated from the positioning column 201 of the push button 200, and the blade 300 can be pulled out from the end groove 104 at the front end for replacement.

[0082] When replacing the blade 300, insert the new blade 300 from the end slot 104, adjust the positioning hole 301 of the new blade 300 to correspond to the position of the positioning post 201 of the push button 200, remove the external force, the push button 200 bounces upward under the elastic force of the elastic structure 207, and the positioning post 201 of the push button 200 enters the positioning hole 301 of the blade 300. The installation of the new blade 300 is completed.

[0083] Through the above-mentioned use process of the utility knife of the present application, it can be concluded that the utility knife of the present application can replace the blade from the front end of the shell, does not require a back cover, has a simple structure, is easy to replace, and is easy to operate.

[0084] In summary, the utility knife proposed in the present application includes a shell, a push knob and a blade. The shell has a cavity inside, the shell surface has an opening, the cavity is connected to the outside through the opening, and one end of the shell has an end slot. There is no need to design a back cover, which reduces the components of the utility knife, simplifies the structure, and reduces the cost. The push knob is slidably arranged in the opening and extends into the cavity, and the push knob has a positioning column. The blade has a positioning hole. The blade passes through the end slot and is connected to the push knob, and the positioning column is connected to the positioning hole; the positioning column of the push knob is separated from the positioning hole of the blade under the action of external force, so that the blade is separated from the end slot of the cover body and then replaced. The push knob is pressed by external force to separate the positioning column of the push knob and the positioning hole of the blade, so that the blade can be pulled out from the end slot at the front end of the utility knife and replaced with a new blade, without the need to disassemble the back cover and other operations, and the replacement action is simple, which is conducive to improving replacement efficiency and user satisfaction.

[0085] The exemplary embodiments of the utility knife proposed in the present application are described and / or illustrated in detail above. However, the embodiments of the present application are not limited to the specific embodiments described herein. On the contrary, the components and / or steps of each embodiment can be used independently and staggered with other components and / or steps described herein. Each component and / or each step of an embodiment can also be used in combination with other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated herein, the terms "one", "an", and "above" are used to indicate the presence of one or more elements / components / etc.

[0086] The embodiments of the present application are not limited to the specific embodiments described herein, on the contrary, the components of each embodiment can be used independently and staggered with other components described herein. Each component of an embodiment can also be used in combination with other components of other embodiments. In the description of this specification, the description of the terms "one embodiment", "some embodiments", "other embodiments" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0087] In the embodiments, the term "plurality" refers to two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments can be understood according to the specific circumstances.

[0088] Although the utility knife proposed in the present application has been described in terms of various specific embodiments, those skilled in the art will recognize that the present application can be implemented with modifications within the spirit and scope of the claims.

Claims

1. A utility knife, characterized in that: include: A shell, wherein the shell has a cavity inside, the shell surface has an opening, the cavity is connected to the outside through the opening, and one end of the shell has an end groove; A push button, the push button is slidably disposed in the opening and extends into the cavity, and the push button has a positioning column; A blade, wherein the blade has a positioning hole; The blade passes through the end slot and is connected to the push button, and the positioning column is connected to the positioning hole; under the action of external force, the positioning column of the push button is separated from the positioning hole of the blade, so that the blade is separated from the end slot of the shell and can be replaced.

2. The utility knife according to claim 1, characterized in that: The housing comprises: A first shell, the first shell comprising a cover surface and a first side wall extending from the periphery of the cover surface in a direction perpendicular to the cover surface, and the opening is arranged on the cover surface; A second shell, the second shell comprising a bottom surface and a second side wall extending from the periphery of the bottom surface in a direction perpendicular to the bottom surface; One end of the first side wall away from the cover surface and one end of the second side wall away from the bottom surface are butted against each other to form the cavity and the end groove.

3. The utility knife according to claim 2, characterized in that: The second housing further comprises: A positioning groove, provided at a portion of the bottom surface close to the end groove; At least two supporting pieces extend from the second side wall toward the positioning groove and are located between the positioning groove and the end groove.

4. The utility knife according to claim 3, characterized in that: The push button comprises: A first plate, wherein a hand-pushing portion is provided on a surface of the first plate facing away from the positioning column; a second plate, wherein the positioning post is arranged on a portion of the second plate facing the first plate and close to the blade, and a distance between a top surface of the positioning post and a surface of the first plate facing the positioning post is greater than a thickness of the blade; A connecting rib connects the first plate and the second plate at portions away from the blade.

5. The utility knife according to any one of claims 3 or 4, characterized in that: A limiting plate is also provided at a position of the cover surface of the first shell facing the supporting plate.

6. The utility knife according to claim 4, characterized in that: A positioning block is disposed on a surface of the second plate facing away from the positioning column. The positioning block can slide along the bottom surface of the second shell and cooperate with the positioning groove.

7. The utility knife according to claim 6, characterized in that: The push button also includes: At least one elastic structure is disposed on the second plate and elastically contacts the bottom surface of the second shell. On the bottom surface of the second shell, a projection of the elastic structure is staggered from a projection of the positioning block.

8. The utility knife according to claim 7, characterized in that: The minimum value of the distance between the elastic structure and the surface of the first plate facing the positioning post is greater than or equal to the distance between two opposite surfaces of the first plate and the second plate.

9. The utility knife according to claim 7, characterized in that: The elastic structure is in an arch shape, and there are at least two of them. Both ends of the arch contact the bottom surface of the second shell, and the middle part of the arch is fixed to the second plate.

10. The utility knife according to claim 9, characterized in that: The extending direction of the arch is the same as the extending direction of the positioning block.

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