Art knife

Abstract

The utility model provides an art knife. The art knife comprises a knife rest, a push lock assembly and a blade. A containing space is arranged in the knife rest, and an opening is formed in the surface of the knife rest in the containing space. The push lock assembly is arranged in the opening in a sliding mode and extends into the containing space, and the push lock assembly comprises a push button and a lock catch. Wherein the push button is arranged at the opening, and the push button is provided with a positioning column and a replacement column. The lock catch is connected to the push button and can slide relative to the push button, and the lock catch is provided with a replacement hole. The blade is provided with a positioning hole. The blade is arranged in the containing space and connected to the push button, and the positioning column is connected to the positioning hole. When the push lock assembly is at any position of the opening, the lock catch slides, the replacement column falls into the replacement hole, the positioning column of the push button is separated from the positioning hole of the blade, and the blade is separated from the knife rest. The blade can be replaced at any position, operation is easy and convenient, and the structure is simple.

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 push button needs to be pushed to the rear end of the utility knife, and the blade cover at the rear end of the utility knife needs to be removed. After the blade and the push button are removed from the rear end of the utility knife, a new blade is replaced, and the installation is completed. The above method of replacing the blade from the rear end of the utility knife is complicated to operate, and a detachable blade 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 which can replace the blade when the push button is in any position and is easy to operate.

[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 knife holder, a push-lock assembly and a blade. The knife holder has an accommodating space inside, and the accommodating space forms an opening on the surface of the knife holder. The push-lock assembly is slidably disposed in the opening and extends into the accommodating space. The push-lock assembly includes a push button and a lock catch. The push button is disposed in the opening, and the push button has a positioning column and a replacement column. The lock catch is connected to the push button and can slide relative to the push button, and the lock catch has a replacement hole. The blade has a positioning hole. The blade is placed in the accommodating space and connected to the push button, and the positioning column is connected to the positioning hole; when the push-lock assembly is at any position of the opening, the lock catch is slid, the replacement column falls into the replacement hole, the positioning column of the push button is disengaged from the positioning hole of the blade, and the blade is disengaged from the knife holder.

[0008] According to one embodiment of the present application, the push button includes a body and a positioning plate. The body has a bottom surface facing the accommodating space, and the replacement column is arranged on the bottom surface. The positioning plate has two ends and a surface located between the two ends, the surface faces the body, and extends at one end in a direction perpendicular to the surface and connected to one end of the bottom surface of the body, and the positioning column is arranged on a portion of the surface close to the other end of the positioning plate, and the positioning plate avoids the replacement column.

[0009] According to one embodiment of the present application, the thickness of the replacement column is greater than or equal to the height of the positioning column.

[0010] According to one embodiment of the present application, the lock includes a plate portion. The plate portion is provided with the replacement hole at one end and a notch at the other end, and a plane is provided between the replacement hole and the notch, and the replacement column can switch between being located on the plane and being located in the replacement hole, so that the utility knife can switch between a normal working state and a blade replacement state.

[0011] According to one of the embodiments of the present application, the push button further includes: an elastic buckle, wherein the elastic buckle is arranged at an end of the bottom surface of the body away from the positioning plate, and the elastic buckle is elastically connected to the lock buckle.

[0012] According to one embodiment of the present application, the elastic buckle includes at least two elastic fingers, each of which is "L"-shaped and has a vertical portion and a horizontal portion, the vertical portion is connected to the bottom surface of the body, and the horizontal portions of at least two of the elastic fingers extend in opposite directions to each other.

[0013] According to one embodiment of the present application, the lock further includes a push portion, which closes the notch to form a mounting hole and is connected to the plate portion, and the push portion protrudes out of the plane.

[0014] According to one embodiment of the present application, the mounting hole includes a first hole and a second hole, the first hole and the second hole are connected, the size of the first hole is larger than the maximum distance between the horizontal parts, and the size of the second hole is smaller than the maximum distance between the horizontal parts and larger than the maximum distance between the vertical parts.

[0015] According to one of the embodiments of the present application, the length of the vertical portion of the elastic finger is greater than the thickness of the plate portion.

[0016] According to one embodiment of the present application, the lock buckle further includes at least one limiting rib, which is disposed on the plate portion and faces away from the plane, and the limiting rib and the replacement hole are located at the same end of the plate portion. On the plane, the projection of the limiting rib and the projection of the replacement hole are staggered.

[0017] According to one embodiment of the present application, the lock buckle further includes an elastic structure. The elastic structure is arc-shaped, one end of the elastic structure is connected to the plate portion, and the other end of the elastic structure contacts the tool holder.

[0018] According to one of the embodiments of the present application, the push button and the lock buckle are both an integrated structure.

[0019] According to one of the embodiments of the present application, the push button further includes at least one limit block disposed on a side wall of the body perpendicular to the bottom surface.

[0020] According to one of the embodiments of the present application, a groove is provided on a side of the tool holder facing the limit block, and the groove cooperates with the limit block.

[0021] According to one of the embodiments of the present application, the accommodating space of the tool holder is further provided with a positioning groove for positioning the blade.

[0022] According to one embodiment of the present application, the utility knife further includes a knife cover, the knife holder has a knife slot for extending and retracting the blade, and the knife cover is installed at one end of the knife holder away from the knife slot.

[0023] It can be seen from the above technical solution that the advantages and positive effects of the utility knife proposed in this application are:

[0024] The utility knife proposed in the present application includes a tool holder, a push-lock assembly and a blade. The tool holder has an accommodating space inside, and the accommodating space forms an opening on the surface of the tool holder. The push-lock assembly is slidably disposed in the opening and extends into the accommodating space. The push-lock assembly includes a push button and a lock catch. The push button is disposed in the opening, and the push button has a positioning column and a replacement column. The lock catch is connected to the push button and can slide relative to the push button, and the lock catch has a replacement hole. The blade has a positioning hole. The blade is placed in the accommodating space and connected to the push button, and the positioning column is connected to the positioning hole. When the push-lock assembly is at any position of the opening, the lock catch is slid, and the replacement column falls into the replacement hole.

[0025] The replacement column falls into the replacement hole, so that the distance between the push button and the lock is reduced, and the push button as a whole is in a downward state relative to the lock, so that the positioning column on the push button also drops accordingly, so that the positioning column of the push button is separated from the positioning hole of the blade. The utility knife of the present application can achieve the blade replacement without pushing the push button to the rear end of the utility knife or removing the knife cover. The push button is in any position of the knife holder opening. The operation is simple and quick, which improves the replacement efficiency and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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:

[0027] Figure 1 It is a structural schematic diagram of the utility knife of this application.

[0028] Figure 2 yes Figure 1 Schematic diagram of the internal structure of the utility knife after cutting along the A surface.

[0029] Figure 3 yes Figure 1 Schematic diagram of the structure of the push button in .

[0030] Figure 4 yes Figure 1 Schematic diagram of the structure of the lock.

[0031] Figure 5 yes Figure 1 Schematic diagram of the first state of the middle push lock assembly.

[0032] Figure 6 yes Figure 1 Schematic diagram of the second state of the middle push lock assembly.

[0033] Figure 7 yes Figure 1 Schematic diagram of the internal structure of the tool holder after being cut along the blade extension direction.

[0034] The following are the descriptions of the reference numerals:

[0035] 1. Utility knife;

[0036] 10. Knife cover;

[0037] 100. Knife holder;

[0038] 101. Accommodation space;

[0039] 102. Open your mouth;

[0040] 103. Groove;

[0041] 104. Positioning slot;

[0042] 105. Knife groove;

[0043] 200. Push lock assembly;

[0044] 201. Push button;

[0045] 2011. Positioning column;

[0046] 2012. Replacement column;

[0047] 2013.Ontology;

[0048] 2014. Bottom;

[0049] 2015. Positioning board;

[0050] 2016. Surface;

[0051] 2017. Elastic buckle;

[0052] 701, 702. Elasticity refers to;

[0053] 2018. Limit block;

[0054] 202. Lock;

[0055] 2021. Replacement hole;

[0056] 2022. Board Department;

[0057] 2023. Plane;

[0058] 2024. Push Department;

[0059] 2025. Mounting hole;

[0060] 501. First hole;

[0061] 502. Second hole;

[0062] 2026. Limiting bars;

[0063] 2027. Elastic structures;

[0064] 300. Blade;

[0065] 301. Positioning hole;

[0066] A - Cutting plane. DETAILED DESCRIPTION

[0067] 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.

[0068] 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.

[0069] like Figure 1 to Figure 2 As shown, Figure 2 yes Figure 1 The specific structure of the interior of the utility knife 1 seen after cutting along the cutting plane A. The utility knife 1 of the present application includes a tool holder 100, a push-lock assembly 200 and a blade 300. The tool holder 100 has an accommodating space 101 inside, and the accommodating space 101 forms an opening 102 on the surface of the tool holder 100. The push-lock assembly 200 is slidably disposed in the opening 102 and extends into the accommodating space 101. The push-lock assembly 200 includes a push button 201 and a lock buckle 202. The push button 201 is disposed in the opening 102, and the push button 201 has a positioning column 2011 and a replacement column 2012. The lock buckle 202 is connected to the push button 201 and can slide relative to the push button 201, and the lock buckle 202 has a replacement hole 2021. The blade 300 has a positioning hole 301. The blade 300 is placed in the accommodating space 101 and connected to the push button 201, and the positioning column 2011 is connected to the positioning hole 301; when the push-lock assembly 200 is at any position of the opening 102, the sliding lock 202, the replacement column 2012 falls into the replacement hole 2021, the positioning column 2011 of the push button 201 is disengaged from the positioning hole 301 of the blade 300, and the blade 300 is disengaged from the blade holder 100.

[0070] The utility knife 1 of the present application adopts a push lock assembly 200. When replacing the blade 300, the replacement column 2012 of the push button 201 falls into the replacement hole 2021 of the lock buckle 202, and the push button 201 is in a descending state relative to the lock buckle 202, so that the positioning column 2011 on the push button 201 also descends, and the positioning column 2011 of the push button 201 is separated from the positioning hole 301 of the blade 300, so that the push lock assembly 200 can replace the blade 300 at any position of the opening 102 of the knife holder 100, and there is no need to push the push button 201 to the rear end of the utility knife 1, and there is no need to remove the knife cover 10. The operation is simple and quick, and the replacement efficiency is improved.

[0071] The replacement column 2012 may be a cylinder, and the replacement hole 2021 may be a round hole, or may be other shapes, as long as the replacement column 2012 can completely fall into the replacement hole 2021 .

[0072] In the present application, the direction in which the blade 300 extends is "front", and the direction in which the blade 300 retracts is "rear"; in the direction perpendicular to the front-to-back direction, the direction from the opening 102 to the interior of the accommodating space 101 is "down", and the direction from the interior of the accommodating space 101 to the opening 102 is "up".

[0073] In this embodiment, the utility knife 1 further includes a blade cover 10, and the knife holder 100 has a knife slot 105 for the blade 300 to extend and retract. The blade cover 10 is installed at one end of the knife holder 100 away from the knife slot 105. The provision of the blade cover 10 is conducive to improving the user's sense of security when using the knife, and can close the opening 102 of the knife holder 100, and can also limit the travel of the push lock assembly 200 to move forward and backward, protect the relatively scattered parts of the utility knife 1, extend the service life of the utility knife 1, and improve the reliability of the use of the utility knife 1.

[0074] In this embodiment, if Figure 3 As shown, the push button 201 includes a body 2013 and a positioning plate 2015. The body 2013 has a bottom surface 2014 facing the accommodating space 101, and the replacement column 2012 is arranged on the bottom surface 2014. The positioning plate 2015 has two ends and a surface 2016 located between the two ends. The surface 2016 faces the body 2013, and extends at one end in a direction perpendicular to the surface 2016 to connect to one end of the bottom surface 2014 of the body 2013. The positioning column 2011 is arranged on the surface 2016 near the other end of the positioning plate 2015, and the positioning plate 2015 avoids the replacement column 2012. The body 2013 of the push button 201 provides a force application point when the user pushes the push button 201, and the replacement column 2012 is arranged on the bottom surface 2014 of the body 2013, so that the blade 300 can be replaced at any position. The body 2013 extends forward and downward to be connected to the positioning plate 2015, so that the positioning plate 2015 can be lowered as the body 2013 is lowered, and can be raised as the body 2013 is raised. The positioning plate 2015 is provided with a positioning post 2011 connected to the blade 300, so that the blade 300 can be positioned and fixed, and when the positioning post 2011 is lowered, the positioning hole 301 on the blade 300 is separated from the positioning post 2011, so that the blade 300 is separated from the push button 201, and the blade 300 can be replaced.

[0075] In this embodiment, the thickness of the replacement column 2012 is greater than or equal to the height of the positioning column 2011. Since the replacement of the blade 300 is mainly performed by dropping the replacement column 2012 into the replacement hole 2021, the height to which the push button 201 integrated with the replacement column 2012 descends is equal to the thickness of the replacement column 2012, and the height to which the positioning column 2011 on the positioning plate 2015 descends is also equal to the thickness of the replacement column 2012. The thickness of the replacement column 2012 is greater than or equal to the height of the positioning column 2011, so that when the blade 300 is replaced, the positioning hole 301 of the old blade 300 can be completely separated from the positioning column 2011, so that the replacement is convenient and will not cause interference.

[0076] In this embodiment, the push button 201 further includes an elastic buckle 2017. The elastic buckle 2017 is disposed at one end of the bottom surface 2014 of the body 2013 away from the positioning plate 2015, and the elastic buckle 2017 is elastically connected to the lock buckle 202. The push button 201 and the lock buckle 202 are connected together by the elastic buckle 2017, so that an elastic connection between the push button 201 and the lock buckle 202 can be achieved. When the utility knife 1 is switched between the normal working state and the blade 300 switching state, the push button 201 and the lock buckle 202 can be connected to each other and have a certain relative movement space.

[0077] In this embodiment, the elastic buckle 2017 includes at least two elastic fingers 701 and 702. The elastic fingers 701 and 702 are both "L" shaped and have a vertical portion and a horizontal portion. The vertical portion is connected to the bottom surface 2014 of the body 2013, and the horizontal portions of at least two elastic fingers 701 and 702 extend in opposite directions to each other. The elastic buckle 2017 is formed by using at least two "L" shaped elastic fingers 701 and 702 to realize the connection between the push button 201 and the lock buckle 202. The structure is simple, and the push button 201 and the lock buckle 202 can be connected to each other while having a certain relative movement space. The horizontal portions of at least two elastic fingers 701 and 702 extend in opposite directions to each other, which can make the connection stable and reliable, and the push button 201 and the lock buckle 202 will not fall off and separate.

[0078] In this embodiment, the push button 201 further includes at least one stopper 2018 disposed on the side wall of the body 2013 perpendicular to the bottom surface 2014. The stopper 2018 is disposed on the side wall of the push button 201 mainly to enable the blade 300 to stay and be fixed at any position of the blade holder 100 when the blade 300 is in normal use.

[0079] In this embodiment, if Figure 4As shown, the lock buckle 202 includes a plate portion 2022. A replacement hole 2021 is provided at one end of the plate portion 2022, and a notch is provided at the other end. A plane 2023 is provided between the replacement hole 2021 and the notch. The replacement column 2012 can be switched between being located on the plane 2023 and being located in the replacement hole 2021, so that the utility knife 1 can be switched between a normal working state and a blade replacement state. The replacement hole 2021 on the plate portion 2022 of the lock buckle 202 is used in conjunction with the replacement column 2012 on the push button 201. When the replacement column 2012 is located on the plane 2023, the utility knife 1 is in a normal working state; when the replacement column 2012 is located in the replacement hole 2021, the utility knife 1 is in a blade replacement state.

[0080] In this embodiment, the lock buckle 202 further includes a push portion 2024, which closes the notch to form a mounting hole 2025 and is connected to the plate portion 2022. The push portion 2024 protrudes from the plane 2023. The setting of the push portion 2024 facilitates the application of external force on the one hand, and can form the mounting hole 2025 on the other hand, so as to realize the mounting connection between the lock buckle 202 and the push button 201.

[0081] In this embodiment, the lock buckle 202 further includes at least one limiting rib 2026, which is arranged on the plate portion 2022 and faces away from the plane 2023. The limiting rib 2026 and the replacement hole 2021 are located at the same end of the plate portion 2022. On the plane 2023, the projection of the limiting rib 2026 is staggered with the projection of the replacement hole 2021. The limiting rib 2026 can limit the position of the lock buckle 202 in the accommodating space 101 of the tool holder 100, mainly when the blade 300 is replaced, the locking rib 202 is limited to move downward relative to the surface inside the tool holder 100. It can also limit the position of the push lock assembly 200 and further limit the position of the blade 300 when the utility knife 1 is in normal working state. The projection of the limiting rib 2026 is staggered with the projection of the replacement hole 2021 so that when the blade 300 is replaced, the limiting rib 2026 will not interfere with the replacement hole 2021, and thus will not interfere with the replacement column 2012 on the push button 201.

[0082] In this embodiment, the lock buckle 202 further includes an elastic structure 2027. The elastic structure 2027 is arc-shaped, one end of the elastic structure 2027 is connected to the plate portion 2022, and the other end contacts the knife holder 100. The setting of the elastic structure 2027 can make the push lock assembly 200 in a compressed state regardless of whether the utility knife 1 is in a normal working state or a blade 300 replacement state, so that the utility knife 1 is in a stable working state and the blade replacement is convenient and fast.

[0083] In this embodiment, if Figure 3 and Figure 4As shown, the mounting hole 2025 includes a first hole 501 and a second hole 502, the first hole 501 and the second hole 502 are connected, and the size of the first hole 501 is larger than the maximum distance between the horizontal parts, so that the horizontal parts of the elastic fingers 701 and 702 can be mounted on the lock buckle 202 through the first hole 501. The size of the second hole 502 is smaller than the maximum distance between the horizontal parts and larger than the maximum distance between the vertical parts. In this way, the horizontal parts of the elastic fingers 701 and 702 cannot be disengaged from the second hole 502, thereby enhancing the firmness of the connection between the push button 201 and the lock buckle 202.

[0084] In this embodiment, if Figure 3 to Figure 4 As shown, the length of the vertical portion of the elastic fingers 701 and 702 is greater than the thickness of the plate portion 2022. In this way, the horizontal portion disposed at the distal end of the vertical portion will not generate pressure with the plate portion 2022, thereby avoiding wear of the overall structure, increasing the service life of the overall structure, reducing the resistance of the user in the process of pushing the lock, and improving the user experience.

[0085] In the above embodiment, the push button 201 and the lock buckle 202 are both integrated structures, which simplifies the process and saves costs.

[0086] Figure 5 The first state of the push-lock assembly 200 of the present application is shown, and the first state is the normal working state of the utility knife 1. Among them, the replacement column 2012 of the push button 201 is on the plane 2023 of the lock buckle 202, and there is a distance between the bottom surface 2014 of the push button 201 and the plane 2023 of the lock buckle 202, and this distance is equal to the thickness of the replacement column 2012. In this state, the body 2013 of the push button 201 is pressed by an external force, so that the limit block 2018 is separated from the groove 103 of the knife holder 100, and the blade 300 can be slid forward and backward and extended. When sliding to the appropriate position, the external force is removed, and the push button 201 bounces upward under the elastic force of the elastic structure 2027 of the lock buckle 202, and the limit block 2018 is stuck in the groove 103 of the knife holder 100 to fix the position of the blade 300.

[0087] Figure 6 The second state of the push lock assembly 200 of the present application is shown, and the second state is the blade replacement state. Figure 5 In the state, the external force is not applied to the push button 201, but to the lock buckle 202, pushing the lock buckle 202 backwards, and the lock buckle 202 does not drop under the action of the limiting rib 2026, and the replacement column 2012 of the push button 201 falls into the replacement hole 2021 of the lock buckle 202, and the bottom surface 2014 of the push button 201 contacts the plane 2023 of the lock buckle 202, so that the push button 201 as a whole will drop, thereby driving the positioning column 2011 at the front end of the push button 201 to drop and disengage from the positioning hole 301 of the blade 300. The blade 300 can be replaced.

[0088] like Figure 7 As shown, in this embodiment, the accommodating space 101 of the blade holder 100 is further provided with a positioning groove 104 for positioning the blade 300. The positioning groove 104 is provided so that when the blade 300 is separated from the positioning post 2011 of the push button 201 in the positioning hole 301, the position of the blade 300 remains unchanged, and a new blade 300 can be positioned to achieve convenient installation.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] Combined with Figures 1 to 7 The use of the utility knife 1 proposed in the present application is divided into a normal use state and a blade replacement 300 state. In the utility knife 1, the elastic structure 2027 of the lock buckle 202 is always in a compressed state.

[0093] Among them, refer to Figure 1-5 and Figure 7In normal use, the replacement column 2012 of the push button 201 is located on the plane 2023 of the lock buckle 202, and there is a distance between the bottom surface 2014 of the push button 201 and the plane 2023 of the lock buckle 202. When it is necessary to adjust the length of the blade 300 extending out of the knife holder 100, an external force is applied to the body 2013 of the push button 201. Since the replacement column 2012 of the push button 201 is located on the plane 2023 of the lock buckle 202, when the push button 201 is pressed downward by an external force, the lock buckle 202 is also subjected to a downward force, and the elastic structure 2027 at the bottom of the lock buckle 202 is further compressed. When the push button 201 drops to the point where the limit block 2018 on the side wall of the push button 201 is separated from the groove 103 of the knife holder 100, the push button 201 and the lock buckle 202 can drive the blade 300 to slide forward and backward along the length direction of the opening 102 of the knife holder 100, thereby adjusting the length of the blade 300 extending out of the knife holder 100. When sliding to the appropriate position, the external force is removed, and the push button 201 bounces upward under the elastic force of the elastic structure 2027 of the lock buckle 202, and the limit block 2018 is inserted into the groove 103 of the tool holder 100 to fix the position of the blade 300.

[0094] Reference Figure 1-4 and Figure 6-7 , the state of replacing the blade 300 is: applying external force to the lock buckle 202 and pushing the lock buckle 202 backward, the lock buckle 202 will not drop under the action of the limiting rib 2026, but will only slide backward, while the push button 201 is not subjected to external force and remains in position, so when the lock buckle 202 slides backward to a proper position, the replacement column 2012 of the push button 201 falls into the replacement hole 2021 of the lock buckle 202, the bottom surface 2014 of the push button 201 contacts the plane 2023 of the lock buckle 202, and the push button 201 drops as a whole, thereby driving the positioning column 2011 at the front end of the push button 201 to drop. At this time, since the positioning groove 104 is provided on the knife holder 100, the blade 300 still stays in the positioning groove 104, that is, the position of the blade 300 has not dropped, so the positioning hole 301 of the blade 300 and the positioning column 2011 of the push button 201 are separated. At this time, the old blade 300 can be pulled out from the blade groove 105 and replaced with a new blade; or the blade 300 can be moved out of the positioning groove 104 from the opening 102 and taken out and replaced with a new blade.

[0095] 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 realize the replacement of the blade at any position without removing the knife cover, and has a simple structure and is easy to operate.

[0096] In summary, the utility knife proposed in the present application includes a knife holder, a push-lock assembly and a blade. The knife holder has a storage space inside, and the storage space forms an opening on the surface of the knife holder. The push-lock assembly is slidably disposed in the opening and extends into the storage space. The push-lock assembly includes a push button and a lock buckle. The push button is disposed in the opening, and the push button has a positioning column and a replacement column. The lock buckle is connected to the push button and can slide relative to the push button, and the lock buckle has a replacement hole. The blade has a positioning hole. The blade is placed in the storage space and connected to the push button, and the positioning column is connected to the positioning hole. When the push-lock assembly is at any position of the opening, the lock buckle is slid, and the replacement column falls into the replacement hole. The replacement column falls into the replacement hole, so that the distance of the push button relative to the lock buckle is reduced, and the push button as a whole is in a descending state relative to the lock buckle, so that the positioning column on the push button also descends, so that the positioning column of the push button is separated from the positioning hole of the blade. The utility knife of the present application can realize that the blade can be replaced when the push button is at any position of the knife holder opening without pushing the push button to the rear end of the utility knife or removing the blade cover. The operation is simple and quick, and there is no need to remove the blade cover, etc. The replacement action is simple, which is conducive to improving the replacement efficiency.

[0097] 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 separately from 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.

[0098] 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 separately from the 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.

[0099] 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.

[0100] 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 tool holder, wherein the tool holder has an accommodating space inside, and the accommodating space forms an opening on the surface of the tool holder; A push lock assembly is slidably disposed in the opening and extends into the accommodating space, and the push lock assembly includes: A push button, the push button is arranged at the opening, and the push button has a positioning column and a replacement column; A lock buckle, the lock buckle is connected to the push button and can slide relative to the push button, and the lock buckle has a replacement hole; A blade, wherein the blade has a positioning hole; The blade is placed in the accommodating space and connected to the push button, and the positioning column is connected to the positioning hole; when the push-lock assembly is at any position of the opening, the lock buckle is slid, the replacement column falls into the replacement hole, the positioning column of the push button is disengaged from the positioning hole of the blade, and the blade is disengaged from the blade holder.

2. The utility knife according to claim 1, characterized in that: The push button comprises: A body, the body having a bottom surface facing the accommodating space, the replacement column being arranged on the bottom surface; A positioning plate having two ends and a surface between the two ends, wherein the surface faces the body and extends at one end in a direction perpendicular to the surface to be connected to one end of the bottom surface of the body, and the positioning column is arranged on a portion of the surface close to the other end of the positioning plate, and the positioning plate avoids the replacement column.

3. The utility knife according to claim 2, characterized in that: The thickness of the replacement column is greater than or equal to the height of the positioning column.

4. The utility knife according to any one of claims 2 to 3, characterized in that: The lock comprises: A plate portion, wherein the replacement hole is arranged at one end of the plate portion and a notch is arranged at the other end, a plane is provided between the replacement hole and the notch, and the replacement column can switch between being located on the plane and being located in the replacement hole, so that the utility knife can switch between a normal working state and a blade replacement state.

5. The utility knife according to claim 4, characterized in that: The push button further includes an elastic buckle, which is arranged on an end of the bottom surface of the body away from the positioning plate, and the elastic buckle is elastically connected to the lock buckle.

6. The utility knife according to claim 5, characterized in that: The elastic buckle includes at least two elastic fingers, each of which is "L"-shaped and has a vertical portion and a horizontal portion. The vertical portion is connected to the bottom surface of the body, and the horizontal portions of at least two of the elastic fingers extend in opposite directions.

7. The utility knife according to claim 6, characterized in that: The lock also includes: A push portion closes the notch to form a mounting hole and is connected to the plate portion. The push portion protrudes out of the plane.

8. The utility knife according to claim 7, characterized in that: The mounting hole includes a first hole and a second hole, the first hole and the second hole are connected, the size of the first hole is larger than the maximum distance between the horizontal parts, the size of the second hole is smaller than the maximum distance between the horizontal parts and larger than the maximum distance between the vertical parts.

9. The utility knife according to any one of claims 6 to 8, characterized in that: The length of the vertical portion of the elastic finger is greater than the thickness of the plate portion.

10. The utility knife according to claim 4, characterized in that: The lock also includes: At least one limiting rib is provided on the plate portion and faces away from the plane, and the limiting rib and the replacement hole are located at the same end of the plate portion; On the plane, the projection of the limiting rib is offset from the projection of the replacement hole.

11. The utility knife according to claim 4, characterized in that: The lock also includes: The elastic structure is arc-shaped, one end of the elastic structure is connected to the plate portion, and the other end contacts the tool holder.

12. The utility knife according to any one of claims 1 to 3, characterized in that: The push button and the lock buckle are both integral structures.

13. The utility knife according to any one of claims 2-3, 5-8, 10-11, characterized in that: The push button also includes: At least one limiting block is arranged on a side wall of the body which is perpendicular to the bottom surface.

14. The utility knife according to claim 13, characterized in that: A groove is arranged on one side of the tool holder facing the limiting block, and the groove cooperates with the limiting block.

15. The utility knife according to any one of claims 1-3, 5-8, 10-11 or 14, characterized in that: The accommodating space of the blade holder is also provided with a positioning groove for positioning the blade.

16. The utility knife according to any one of claims 1-3, 5-8, 10-11 or 14, characterized in that: The utility knife further comprises a knife cover. The knife holder has a knife groove for extending and retracting the blade. The knife cover is installed at one end of the knife holder away from the knife groove.

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