A utility knife

Abstract

The utility model provides a kind of art knife, it is related to cutter technical field.Art knife includes cutter assembly and the laser assembly of detachable connection with cutter assembly;Laser assembly includes the power supply of series connection forming power supply circuit, laser emitting element and first switch, and first switch is normally closed switch;In the case where laser assembly is installed to cutter assembly, cutter assembly acts on first switch and makes it open, to cut off power supply circuit.One aspect, laser assembly can be detached from cutter assembly, as independent laser positioning tool is used, projects straight laser beam, assists user to carry out accurate marking or aligns path before cutting;Another aspect, when laser assembly is installed to cutter assembly, power supply circuit is automatically cut off by mechanical linkage structure, prevent laser misstart, realize the effect of safe and energy-saving.

Description

Technical Field

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

[0002] Utility knives are a common hand tool on the market, often used to cut paper, leather, plastic sheets, or cardboard. However, when using utility knives for cutting, users usually rely on visual alignment, making it difficult to achieve precise straight cuts. This results in uneven, crooked cut edges, dimensional errors, and an inability to meet the needs of fine processing. Utility Model Content

[0003] The purpose of this utility model is to provide a utility knife equipped with a detachable laser component, which can be removed and used as an independent positioning tool to project laser lines, indicate a precise cutting path, and improve cutting accuracy and effect.

[0004] The embodiments of this utility model can be implemented as follows: In a first aspect, this utility model provides a utility knife, including a knife assembly and a laser assembly detachably connected to the knife assembly; The laser assembly includes a power supply, a laser emitting element, and a first switch connected in series to form a power supply circuit, and the first switch is a normally closed switch. When the laser assembly is mounted on the tool assembly, the tool assembly acts on the first switch and disconnects it, thereby cutting off the power supply circuit.

[0005] In an optional embodiment, the laser assembly includes a laser housing, and the laser housing has power contacts that cooperate with the first switch.

[0006] In an optional embodiment, the first switch is an elastic conductive element located inside the laser housing, which is electrically connected to the power contact and has a tendency to maintain the electrical connection.

[0007] In an optional embodiment, the tool assembly includes a tool housing and an insert slidably connected to the tool housing; The tool housing has a protrusion, which is used to press against the elastic conductive element when the laser component is installed onto the tool assembly, so that it is disconnected from the electrical connection with the power contact; or, the protrusion is an insulating structure, which is used to insert between the elastic conductive element and the power contact when the laser component is installed onto the tool assembly, thereby blocking the power supply circuit.

[0008] In an optional embodiment, the protrusion is provided with a guide surface that slides in conjunction with the elastic conductive element.

[0009] In an optional implementation, the elastic conductive element is a metal spring.

[0010] In an optional implementation, the laser assembly and the tail end of the tool assembly are detachably connected.

[0011] In an optional embodiment, the laser assembly further includes a second switch connected in series with the power supply circuit, the second switch being a normally open switch.

[0012] In an optional implementation, the utility knife also includes a magnetic structure, through which the knife assembly and the laser assembly are detachably connected.

[0013] In an optional implementation, the utility knife also includes a snap-fit ​​structure, through which the knife assembly and the laser assembly are detachably connected.

[0014] The beneficial effects of the utility knife provided in this embodiment of the invention include: This utility model provides a utility knife, including a blade assembly and a laser assembly detachably connected to the blade assembly. On one hand, the laser assembly can be detached from the blade assembly and used as an independent laser positioning tool, projecting a straight laser beam to assist the user in accurately marking or aligning the path before cutting. On the other hand, when the laser assembly is installed on the blade assembly, a mechanical linkage structure automatically cuts off the power supply circuit to prevent accidental laser activation, achieving a safe and energy-saving effect. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the utility knife provided in this embodiment; Figure 2 This is a schematic diagram of the power supply circuit provided in this embodiment; Figure 3 This is a schematic diagram of the structure of the laser component provided in this embodiment; Figure 4 Provided for this embodiment Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the tool assembly provided in this embodiment; Figure 6 Provided for this embodiment Figure 5 Enlarged diagram of point B in the middle.

[0017] Icons: 10-Utility knife; 100-Knife assembly; 110-Knife housing; 120-Protrusion; 121-Guide surface; 130-Blade; 300-Laser assembly; 310-Power supply; 320-Laser emitting element; 330-First switch; 331-Elastic conductive element; 340-Second switch; 350-Laser housing; 351-Power contact. Detailed Implementation

[0018] In related technologies, utility knives rely on visual alignment, making it difficult to achieve straight cuts, resulting in uneven edges and inaccurate dimensions, which affects fine processing.

[0019] To address the aforementioned issues, this utility model provides a utility knife equipped with a detachable laser component. When removed, it can be used as an independent positioning tool to project laser lines, indicating precise cutting paths and improving cutting accuracy and quality.

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0025] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0026] The following describes in detail the overall structure, working principle, and technical effects of the utility knife provided by this utility model through embodiments and in conjunction with the accompanying drawings.

[0027] Please see Figure 1 and Figure 2 This utility model provides a utility knife 10, which aims to solve the technical problems in the prior art, such as uneven cutting paths, uneven edges, and large dimensional errors caused by relying on visual alignment when users use the utility knife 10 for cutting operations. The utility knife 10 includes a blade assembly 100 and a laser assembly 300 detachably connected to the blade assembly 100.

[0028] The laser component 300 projects one or more straight laser beams as visual guides during the cutting process, helping the user to operate precisely along a preset trajectory. Specifically, the laser component 300 includes a power supply 310, a laser emitting element 320, and a first switch 330, which are connected in series to form a power supply circuit. The first switch 330 is a normally closed switch, which is understood as a switch that is in the conducting (closed) state when no external force is applied (i.e., in the non-operational or default state).

[0029] Furthermore, to ensure that the laser assembly 300 does not start accidentally when installed on the tool assembly 100, and to ensure safe and energy-saving operation, when the laser assembly 300 is installed on the tool assembly 100, the tool assembly 100 acts on the first switch 330 and disconnects it, thereby cutting off the power supply circuit.

[0030] Please refer to it again. Figure 2 To enable on-demand start / stop control of the laser component 300 when used independently, and to further improve safety and energy efficiency, the laser component 300 also includes a second switch 340 connected in series with the power supply circuit. The second switch 340 is a normally open switch, which can be configured as a tactile button switch, a toggle switch, or a side-press micro switch. A normally open switch is understood as a switch whose contacts are in the open state when not in operation or in the default state.

[0031] Based on the above, the first switch 330 and the second switch 340 together constitute a dual-switch collaborative working mechanism: on the one hand, when the laser component 300 is installed on the tool component 100, the tool component 100 presses the first switch 330 to disconnect it, forcibly cutting off the power supply circuit and preventing the laser from being accidentally started; on the other hand, when the laser component 300 is removed and used independently, the user must actively operate the second switch 340 to connect the circuit and light up the laser, effectively avoiding power waste or safety hazards caused by accidental triggering during random placement or carrying.

[0032] That is, the entire power supply circuit can only be fully connected when the first switch 330 is in the conducting state (at which time the laser component 300 is not installed on the tool component 100) and the user actively closes the second switch 340. Only then can the power supply 310 supply power to the laser emitting element 320, thereby starting laser emission and projecting a straight guiding beam for precise positioning.

[0033] Please see Figure 3 and Figure 4 In one specific embodiment, the laser assembly 300 includes a laser housing 350. The laser housing 350 is used to house and protect internal electronic components, and the laser housing 350 is provided with power contacts 351 that cooperate with the first switch 330 to realize the connection and disconnection of the power supply circuit.

[0034] Accordingly, the first switch 330 is an elastic conductive element 331 located inside the laser housing 350. The elastic conductive element 331 is electrically connected to the power contact 351 and has a tendency to maintain the electrical connection. In other words, in its natural state, the elastic conductive element 331 continuously applies pressure to the power contact 351 due to its own elastic deformation tendency, thereby maintaining the electrical connection and realizing a normally closed design.

[0035] Optionally, the elastic conductive element 331 is a metal spring made of a metal material with good conductivity and elasticity, such as phosphor bronze, beryllium copper, or stainless steel. Its shape can be adapted to the internal spatial layout of the laser housing 350, such as an arc-shaped sheet, a U-shaped spring, or a cantilever beam structure.

[0036] Thus, when the tool assembly 100 is connected to the laser assembly 300, the tool assembly 100 extends at least partially into the laser housing 350 and forces the elastic conductive element 331 to disengage from the power contact 351, thereby disconnecting the power supply circuit of the laser assembly 300.

[0037] Specifically, such as Figure 5 and Figure 6 As shown, the tool assembly 100 includes a tool housing 110 and a blade 130 slidably connected to the tool housing 110. The blade 130 can move back and forth along the guide groove of the tool housing 110, and its extension length can be adjusted by a limiting structure to adapt to the cutting needs of materials of different thicknesses. This part is a conventional functional structure of the utility knife 10 and will not be described in detail here.

[0038] Unlike conventional functional structures, the tool housing 110 has a protrusion 120. This protrusion 120 serves as a mechanical structure during the installation of the laser assembly 300, enabling the automatic disconnection of the power supply circuit. When the user installs the laser assembly 300 onto the tool assembly 100, the protrusion 120 engages with the elastic conductive element 331 inside the laser assembly 300, thereby cutting off the power supply circuit.

[0039] In one embodiment, the protrusion 120 is used to press against the elastic conductive member 331 when the laser assembly 300 is mounted to the tool assembly 100, causing it to deform and disconnect from the electrical connection with the power contact 351, thereby physically disconnecting the power supply circuit. In another embodiment, the protrusion 120 is an insulating structure used to insert between the elastic conductive member 331 and the power contact 351 when the laser assembly 300 is mounted to the tool assembly 100, forming an insulating barrier and blocking the power supply circuit path.

[0040] Furthermore, please refer again. Figure 6 To reduce assembly resistance and improve handling, the protrusion 120 is provided with a guide surface 121 that slides with the elastic conductive element 331. This guide surface 121 is used to achieve smooth guidance and reliable contact during the assembly of the laser assembly 300 and the tool assembly 100, ensuring stable disconnection of the power supply circuit. Optionally, the guide surface 121 is a sloped surface or an arc surface.

[0041] During the assembly process, the guide surface 121 first contacts the free end of the elastic conductive element 331 and produces a sliding fit under their relative movement. As the laser component 300 is gradually inserted, the guide surface 121 decomposes the normal interference force into a radial compression component and an axial sliding component, so that the elastic conductive element 331 slides smoothly along the guide surface 121 and gradually undergoes elastic deformation, eventually completely separating from the power contact 351, thus achieving a reliable disconnection of the power supply circuit.

[0042] To prevent the laser assembly 300 from altering the original gripping area of ​​the tool assembly 100 while in the installed state, the laser assembly 300 is detachably connected to the tail end of the tool assembly 100 to maintain the simplicity and harmony of the tool assembly 100's appearance.

[0043] Specifically, the protrusion 120 in the aforementioned embodiment is located on the side of the tool housing 110 away from the cutting edge, that is, in the end or tail area of ​​the tool body. While achieving functional integration, it also takes into account the convenience of storage and the overall aesthetics of the product.

[0044] To further enhance the ease of installation and removal of the laser component 300 and optimize the user experience, the utility knife 10 also includes a magnetic structure, through which the knife component 100 and the laser component 300 can be detachably connected.

[0045] In practical applications, the magnetic attraction structure includes at least one set of mutually attracted magnetic components. For example, a permanent magnet is embedded inside the laser housing 350, and a ferromagnetic metal component or a permanent magnet with opposite polarity is provided at the corresponding position at the tail of the tool housing 110 to form a mutually attractive magnetic field.

[0046] Therefore, when the laser component 300 approaches the tail of the tool housing 110, the magnetic attraction can automatically guide it to align and complete the adsorption and fixation, achieving a fast and stable connection.

[0047] To further improve the stability and reliability of the connection between the laser component 300 and the tool component 100, the utility knife 10 also includes a snap-fit ​​structure, through which the tool component 100 and the laser component 300 are detachably connected.

[0048] In practical applications, the snap-fit ​​structure includes a snap-fit ​​part and a snap-fit ​​groove that cooperate with each other, one of which is disposed in the tool assembly 100 and the other is disposed in the laser assembly 300. For example, an elastic snap-fit ​​part is provided on the inner side wall of the laser housing 350, and a matching snap-fit ​​groove is provided at a corresponding position at the tail of the tool housing 110; or conversely, the snap-fit ​​groove is disposed inside the laser housing 350, and the snap-fit ​​part is disposed at the tail end of the tool body.

[0049] Therefore, when the user pushes the laser component 300 into the tail of the cutter body along the axial direction, the locking part slides smoothly into the locking groove under the action of elastic deformation, and automatically springs back and locks after it is in place, so as to achieve a stable connection.

[0050] Taking the utility knife 10 provided by this utility model as an example, its working principle is as follows: When the laser assembly 300 is removed from the tool assembly 100, the elastic conductive element 331 is not subjected to external pressure and maintains good contact with the power contact 351 under its own elastic force. At this time, if the operator triggers the second switch 340, the power supply circuit can be normally turned on, the laser emitting element 320 is activated and projects a straight laser beam to assist the user in making precise markings or aligning the path during cutting.

[0051] When the laser component 300 is assembled to the tail of the tool component 100, the protrusion 120 at the tail of the tool housing 110 extends into the laser housing 350 and directly presses against the elastic conductive element 331, forcing it to undergo elastic deformation and detach from the power contact 351, thus causing a physical circuit break. This completely cuts off the power supply circuit, prevents the laser emitting element 320 from being accidentally started, and realizes a safe and energy-saving automatic power-off function.

[0052] In summary, this utility model provides a utility knife 10, including a knife assembly 100 and a laser assembly 300 detachably connected to the knife assembly 100. On one hand, the laser assembly 300 can be detached from the knife assembly 100 and used as an independent laser positioning tool, projecting a straight laser beam to assist the user in accurately marking or aligning the path before cutting. On the other hand, when the laser assembly 300 is installed on the knife assembly 100, a mechanical linkage structure automatically cuts off the power supply circuit to prevent accidental laser activation, achieving a safe and energy-saving effect.

[0053] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A utility knife, characterized in that, It includes a tool assembly (100) and a laser assembly (300) detachably connected to the tool assembly (100). The laser assembly (300) includes a power supply (310) connected in series to form a power supply circuit, a laser emitting element (320), and a first switch (330), wherein the first switch (330) is a normally closed switch. When the laser assembly (300) is mounted to the tool assembly (100), the tool assembly (100) acts on the first switch (330) and disconnects it, thereby cutting off the power supply circuit.

2. The utility knife according to claim 1, characterized in that, The laser assembly (300) includes a laser housing (350), and the laser housing (350) is provided with a power contact (351) that cooperates with the first switch (330).

3. The utility knife according to claim 2, characterized in that, The first switch (330) is an elastic conductive element (331) located inside the laser housing (350). The elastic conductive element (331) is electrically connected to the power contact (351) and has a tendency to maintain the electrical connection.

4. The utility knife according to claim 3, characterized in that, The tool assembly (100) includes a tool housing (110) and a cutting blade (130) slidably connected to the tool housing (110). The tool housing (110) is provided with a protrusion (120), which is used to press against the elastic conductive element (331) when the laser assembly (300) is installed on the tool assembly (100), so that it is disconnected from the electrical connection with the power contact (351); or, the protrusion (120) is an insulating structure, which is used to insert between the elastic conductive element (331) and the power contact (351) when the laser assembly (300) is installed on the tool assembly (100), thereby blocking the power supply circuit.

5. The utility knife according to claim 4, characterized in that, The protrusion (120) is provided with a guide surface (121) that slides with the elastic conductive element (331).

6. The utility knife according to claim 3, characterized in that, The elastic conductive element (331) is a metal spring.

7. The utility knife according to any one of claims 1 to 6, characterized in that, The laser assembly (300) is detachably connected to the tail end of the tool assembly (100).

8. The utility knife according to any one of claims 1 to 6, characterized in that, The laser assembly (300) also includes a second switch (340) connected in series with the power supply circuit, the second switch (340) being a normally open switch.

9. The utility knife according to any one of claims 1 to 6, characterized in that, The utility knife (10) also includes a magnetic structure, and the knife assembly (100) and the laser assembly (300) are detachably connected through the magnetic structure.

10. The utility knife according to any one of claims 1 to 6, characterized in that, The utility knife (10) also includes a snap-fit ​​structure, and the knife assembly (100) and the laser assembly (300) are detachably connected through the snap-fit ​​structure.

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