Magnetic drawing pin
By designing a contact surface, a support surface, an anti-slip groove, and a force-applying surface on the thumbtack shell, the problem of unstable gripping caused by the smooth surface of the thumbtack is solved, achieving a more stable grip and convenient disassembly, thus improving the efficiency and functionality of the thumbtack.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG ZHIJU INTELLIGENT MFG CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-06-16
AI Technical Summary
The existing thumbtacks have a smooth surface, making it difficult for fingers to grip them steadily and causing them to slip easily when grasping them.
A magnetic tack has been designed, including a housing. One side of the housing has a contact surface and a support surface. The contact surface is flat, and the support surface is curved to match the contour of the finger. The housing has anti-slip grooves and inclined force-applying surfaces to enhance grip stability. A magnet is installed inside the housing and fixed by an adhesive layer. The end of the housing has a sharp point and a dovetail to enhance functionality and facilitate disassembly.
It improves the grip stability of thumbtacks, enhances anti-slip performance, simplifies the disassembly process, improves functionality, and reduces the difficulty of magnetic disassembly.
Smart Images
Figure CN224360903U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of thumbtack technology, and in particular to a magnetic thumbtack. Background Technology
[0002] Thumbtacks are common and simple fixing devices, easy to use and widely applicable, and can be seen everywhere in daily life. They are often used to fix various paper documents. Various thumbtack designs have emerged to meet different needs.
[0003] In the prior art, application number CN202321791600.5 describes a U-shaped magnetic tack, which includes a tack and a magnetic element disposed on the tack. The tack includes two sets of U-shaped elements, each set of U-shaped elements including a U-shaped portion and a pointed portion disposed on one side of the U-shaped portion. The other side of the U-shaped portion is provided with a receiving hole for accommodating the pointed portion. The receiving holes in the two sets of U-shaped elements are correspondingly connected to the pointed portions, thereby forming an elongated oval closed structure.
[0004] Existing thumbtacks have smooth surfaces, making them difficult to grip steadily when applying force, and they are prone to slipping. Therefore, it is necessary to improve this structure to overcome the above-mentioned defects. Utility Model Content
[0005] The purpose of this invention is to provide a magnetic thumbtack to solve the problem that existing thumbtacks have smooth surfaces, making it difficult for fingers to grip them stably when applying force, and they are prone to slipping when grasping them.
[0006] The above-mentioned technical objective of this utility model is achieved by the following technical solution:
[0007] A magnetic tack includes a housing for providing support and mounting space. One side of the housing has a contact surface, and the other side has a support surface. A mounting hole is formed on the side of the housing with the contact surface. One end of the mounting hole is located on the outer wall of the housing, and the other end of the mounting hole extends toward the interior of the housing. A magnet is placed inside the mounting hole. An anti-slip groove is formed on the end of the housing with the support surface. One end of the anti-slip groove is located on the outer wall of the housing, and the other end of the anti-slip groove extends toward the interior of the housing.
[0008] A further feature of this invention is that the bonding surface is a plane, and the bonding surface is used to contact and bond with the adsorption surface.
[0009] A further feature of this invention is that the supporting surface is an arc surface, which matches the contour of the human finger for easy gripping.
[0010] A further feature of this invention is that the shell has a force-applying surface, and the contact surface and the gripping surface are connected by the force-applying surface, which is an inclined surface.
[0011] A further feature of this invention is that the end of the shell protrudes outward to form a sharp portion.
[0012] A further feature of this invention is that the end of the shell is recessed inward to form a dovetail portion.
[0013] A further feature of this invention is that an adhesive layer is provided inside the mounting hole, and the magnet is mounted inside the mounting hole through the adhesive layer.
[0014] A further feature of this invention is that the mounting hole is a round hole, and the end of the mounting hole has a countersunk hole structure.
[0015] In summary, this utility model has the following beneficial effects:
[0016] 1. The support surface conforms to the contour of the fingers, and the anti-slip groove is embedded in the fingertip to improve grip stability. The force application surface is set to convert vertical pressing force into horizontal prying force, making it easy to remove thumbtacks.
[0017] 2. The shell has integrated sharp points that can quickly cut open envelopes, tape, or plastic packaging, improving the functionality of the thumbtack.
[0018] 3. The dovetail is designed as a fulcrum for removal. After inserting a finger, the thumbtack can be pried open using the lever principle, thus solving the problem of excessive magnetic force making it difficult to remove.
[0019] 4. The countersunk hole design at the end of the round hole precisely limits the magnet's position, and the adhesive layer ensures the magnet's stability and prevents it from falling off. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model.
[0021] Figure 2 This is the front view of this utility model.
[0022] Figure 3 This is an isometric drawing of this utility model.
[0023] Figure 4 This is a side view of the present invention.
[0024] Numerical designations: 1. Housing, 11. Fitting surface, 12. Supporting surface, 13. Mounting hole, 14. Magnet, 15. Anti-slip groove, 16. Force application surface, 17. Sharp part, 18. Dovetail part. Detailed Implementation
[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with the illustrations and specific embodiments.
[0026] like Figures 1 to 4As shown, the present invention proposes a magnetic tack, including a housing 1, which is injection molded and provides support and installation space. One side of the housing 1 has a contact surface 11, and the other side has a support surface 12. An installation hole 13 is provided on the side of the housing 1 with the contact surface 11. Preferably, the installation hole 13 is a round hole with a countersunk structure at its end. One end of the installation hole 13 is located on the outer wall of the housing 1, and the other end extends towards the interior of the housing 1. The installation hole 13 provides a space to accommodate a magnet 14, which is placed inside the installation hole 13 and is positioned by the installation hole 13. An anti-slip groove 15 is provided on the end of the housing 1 with the support surface 12. One end of the anti-slip groove 15 is located on the outer wall of the housing 1, and the other end extends towards the interior of the housing 1. The anti-slip groove 15 increases the friction between the finger and the housing 1. The number of anti-slip grooves 15 can be increased as needed; their positions in the figure are for illustrative purposes only.
[0027] The bonding surface 11 is a flat surface. The bonding surface 11 is used to contact and adhere to the adsorption surface. When in use, the user holds the thumbtack, aligns the bonding surface 11 with the metal adsorption surface, and presses it slightly to make the bonding surface 11 fully contact the adsorption surface. The magnet 14 uses magnetic force to firmly adsorb the thumbtack at the target position.
[0028] The abutment surface 12 is curved and matches the contour of the human finger. During use, the user places their thumb against the abutment surface 12 and presses the force application surface 16 with their index finger to form a pinching gesture. The abutment surface 12 perfectly matches the curvature of the finger, and the texture of the anti-slip groove 15 is embedded in the fingertip for a stable grip. Maintaining the pinching posture, align the contact surface 11 with the adsorption surface to make the magnet 14 adhere to the adsorption surface.
[0029] The housing 1 has a force-applying surface 16. The contact surface 11 and the gripping surface are connected by the force-applying surface 16. The force-applying surface 16 is an inclined surface. When the user presses the force-applying surface 16 with his / her finger, the force-applying surface 16 can convert the downward pressing force into a horizontal prying force, reducing the attraction between the magnet 14 and the adsorption surface, thus making it easier to remove the thumbtack.
[0030] The end of the shell 1 protrudes outward to form a sharp point 17, which is used to cut paper, plastic packaging, tape, etc. In an office setting, the sharp point 17 can be used directly to cut open envelopes or unpack packaging, serving as a simple cutting tool.
[0031] The end of the shell 1 is recessed inward to form a dovetail 18. When you need to remove the thumbtack, insert your finger into the dovetail 18 and use the dovetail 18 as a fulcrum to apply force outward to overcome the magnetic attraction and remove the thumbtack.
[0032] An adhesive layer (omitted in the figure) is provided inside the mounting hole 13. The magnet 14 is placed inside the mounting hole 13 through the adhesive layer. When in use, liquid adhesive is injected into the mounting hole 13, and the magnet 14 is pressed into the mounting hole 13. The adhesive fills the tiny gap between the magnet 14 and the hole wall, and forms a stable connection after curing.
[0033] Example 1
[0034] This embodiment provides a magnetic tack, including a shell 1 integrally molded by injection molding. The shell 1 has a hollow structure to reduce the overall weight of the tack, and its outer contour is a streamlined spindle shape.
[0035] One end of the housing 1 is a planar bonding surface 11, which is used to fully bond with a metal adsorption surface (such as a blackboard or refrigerator door). A circular mounting hole 13 is opened in the center of the bonding surface 11. A cylindrical neodymium iron boron magnet 142 is embedded in the mounting hole 13. The bottom surface of the magnet 142 is bonded to the mounting hole 13 by an epoxy resin adhesive layer.
[0036] The other end of the housing 1 has a curved support surface 12 that matches the curvature of the human fingertip. Multiple anti-slip grooves 15 are evenly distributed on the surface of the support surface 1213, increasing the coefficient of friction. The support surface 12 and the contact surface 11 are connected by an inclined force-applying surface 16, which is sandblasted to create a frosted texture. The end of the housing 1 has a sharp point 17, and a dovetail groove is formed at the bottom of the housing 1, which can form a lever fulcrum with the finger.
[0037] The usage process and principle of this utility model are as follows: In use, the thumb adheres to the holding surface 12, and the index finger presses the force-applying surface 16 to form a pinching gesture. The contact surface 11 is aligned with the metal surface and gently pressed, causing the magnet 14 to automatically adhere and fix the tack. To remove the tack, continuously press the force-applying surface 16; the inclined surface decomposes the pressing force into a horizontal component, weakening the magnetic attraction, allowing for direct removal. Alternatively, insert a finger into the dovetail portion 18, using the concave structure as a fulcrum to pry the tack, overcoming the magnetic attraction. The sharp end 17 of the tack can directly cut through materials such as paper and plastic film, eliminating the need for additional tools and improving office efficiency.
[0038] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connect" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. In this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.
[0039] Any descriptions not covered in the above specific embodiments of this utility model belong to the well-known technology in the field, and can be implemented by referring to the well-known technology.
[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A magnetic tack, comprising a housing for providing support and mounting space, characterized in that, One side of the housing is provided with a contact surface, and the other side of the housing is provided with a support surface. A mounting hole is provided on the side of the housing with the contact surface. One end of the mounting hole is located on the outer wall of the housing, and the other end of the mounting hole extends toward the inside of the housing. A magnet is provided in the mounting hole. An anti-slip groove is provided on the end of the housing with the support surface. One end of the anti-slip groove is located on the outer wall of the housing, and the other end of the anti-slip groove extends toward the inside of the housing.
2. The magnetic tack according to claim 1, characterized in that, The bonding surface is a plane and is used to contact and bond with the adsorption surface.
3. A magnetic tack according to claim 1, characterized in that, The supporting surface is curved and matches the contour of a human finger.
4. A magnetic tack according to claim 1, characterized in that, The housing has a force-applying surface, and the contact surface and the gripping surface are connected by the force-applying surface, which is an inclined surface.
5. A magnetic tack according to claim 1, characterized in that, The end of the shell protrudes outward to form a sharp part.
6. A magnetic tack according to claim 1, characterized in that, The end of the shell is recessed inward to form a dovetail.
7. A magnetic tack according to claim 1, characterized in that, An adhesive layer is provided inside the mounting hole, and the magnet is mounted inside the mounting hole through the adhesive layer.
8. A magnetic tack according to claim 1, characterized in that, The mounting hole is a round hole, and the end of the mounting hole has a countersunk hole structure.