Structure not prone to disengagement of screw

Abstract

The utility model discloses a structure of a screw not easy to fall off, and particularly relates to the technical field of installation structures, the structure comprises an installation component and a screw, the screw is installed in an installation hole of the installation component through threads, the installation component is provided with a protruding structure matched with the threads of the screw, and the protruding structure is clamped with the threads of the screw. The number of layers of the threads corresponds to the number or distribution levels of the protruding structures. According to the utility model, the convex structure is arranged and is combined with the threads on the screw for clamping, and the threads are protected according to the number of layers of the threads, so that even if a product is in a complex working condition of vibration, bumping or frequent opening and closing for a long time, the rotation and displacement of the screw can be effectively inhibited by virtue of continuous friction force and mechanical locking action; the caulking grooves are designed in a precise matching mode, the error between the hole diameter and the screw diameter is controlled within the extremely small range, it is ensured that the screws are tightly attached after being installed, and the loosening risk caused by gaps is reduced to the maximum extent.

Description

Technical Field

[0001] This utility model relates to the field of installation structure technology, specifically to a structure for screws that are not easily detached. Background Technology

[0002] In the field of modern industrial manufacturing, screws, as a basic and key fastening component, are widely used in the assembly of various electronic products, from smartphones and tablets to children's toys and everyday small appliances. Due to their convenient installation and disassembly characteristics, screws have become the preferred method for fixing product structures.

[0003] However, the frequent use of screws also brings potential risks. Environmental factors such as temperature changes and humidity fluctuations can cause differences in thermal expansion and contraction between the product material and the screw, further increasing the possibility of the screw loosening. Once the screw loosens, its stability will continue to decrease until it falls off completely. In recent years, news of children accidentally swallowing screws due to product screws falling off has become common. Such safety accidents not only pose a serious threat to children's health, but the sharp screw parts may also scratch children's mouths and esophagus, and even cause serious consequences such as suffocation. At the same time, it also exposes the major defects in the safety design of traditional screw structures.

[0004] Secondly, in current electronic products, the screw mounting structure traditionally features large screw hole designs with a directly narrowed perimeter. This design makes it difficult to completely enclose the screw nut after installation, leaving it mostly exposed. Exposed nuts are highly susceptible to external impacts and vibrations during product use, leading to screw loosening or even detachment. Furthermore, the large hole diameter and directly narrowed hole walls cannot provide sufficient friction and gripping force for the screw, further reducing its stability and making it difficult to meet increasingly stringent product safety standards. Utility Model Content

[0005] The purpose of this invention is to provide a structure for screws that are not easily detached, in order to solve the above-mentioned shortcomings in the technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a structure for a screw that is not easily detached, comprising an installation component and a screw, wherein the screw is threadedly installed in the installation hole of the installation component, the installation component is provided with a protruding structure that engages with the screw thread, the protruding structure and the screw thread form a locking engagement, the number of thread layers corresponds to the number or distribution level of the protruding structure, so as to prevent the screw from loosening and falling off through multi-layer locking.

[0007] Preferably, the protrusion structure is a toothed structure, and the height of the toothed structure is adapted to the thread height of the screw to achieve a tight engagement.

[0008] Preferably, the protruding structure is made of an elastic material to enhance the engagement tightness between the protruding structure and the thread through elastic deformation. The elastic material has excellent flexibility and resilience. When the screw is screwed into the mounting hole, as the thread gradually penetrates, the protruding structure will undergo elastic deformation due to the compression of the thread. The toothed structure will closely fit the contour of the thread like a resilient "spring tooth," not only filling the tiny machining tolerance gaps but also generating additional elastic pressure between the two. This elastic pressure, like countless miniature springs, continuously acts on the contact surface between the thread and the protruding structure, further enhancing the engagement tightness.

[0009] Preferably, the mounting component is made of plastic, and the protruding structure and the mounting component are integrally molded by injection molding. This integral molding method not only ensures the dimensional accuracy and positional accuracy of the protruding structure and avoids the assembly errors that may occur in traditional assembly methods, but also significantly enhances the bonding strength between the protruding structure and the mounting component, so that the protruding structure will not fall off or loosen under the pressure of screws being screwed in and under the external force during long-term use.

[0010] Specifically, this design breaks away from the limitations of traditional screws that rely solely on the friction of their own threads for fastening. It transforms the friction of a single point of contact into a three-dimensional, surrounding interlocking resistance. In actual use, whether children's toys are subjected to frequent shaking or drops, or electronic products experience severe vibrations during transportation, the multi-layered engagement between the screw and the raised structure can continuously counteract the torque generated by external forces, effectively suppressing the rotation and displacement of the screw. Even if the screw shows a slight tendency to loosen due to long-term use, the raised structure will prevent the screw from loosening further due to its mechanical blocking effect, ensuring that the screw is always firmly held in the mounting hole, providing a reliable fastening guarantee for the product structure.

[0011] Preferably, the front of the mounting component is provided with a groove adapted to the screw, ensuring that after the screw is tightened, the nut can be completely embedded in the groove, effectively avoiding the risk of bumps and external interference caused by the exposed nut. The size of the groove matches the size of the screw and nut, and the outer extension of the groove is provided with a flat groove. The flat groove fits against the bottom surface of the screw and nut to increase the resistance to the screw being pulled out. By increasing the contact area between the two, the pull-out resistance of the screw is significantly improved, transforming the single axial tightening force during traditional screw installation into a composite tightening force with axial and radial synergy. When the screw is subjected to an outward pulling force, the sidewall of the flat groove will form a reverse support, restricting the movement of the nut and making the screw difficult to pull out easily, providing additional safety for the product structure.

[0012] Preferably, the depth of the planar groove is greater than or equal to half the thickness of the screw and nut. This depth setting ensures that at least half the thickness of the nut can be contained by the planar groove, allowing the nut and the planar groove to form a deep fit. Furthermore, the inner diameter of the planar groove matches the outer diameter of the screw and nut, ensuring that the nut can be smoothly inserted and achieving interference contact through a small tolerance fit, further enhancing the fastening effect. When the screw is screwed into the mounting component, the nut is tightly pressed against the inner wall of the planar groove, generating a large frictional force, effectively resisting the loosening effect of external forces on the screw. Whether it is the frequent shaking of children's toys during play or the bumps and impacts encountered by electronic products during transportation, the planar groove can firmly lock the nut with its depth and matching size, ensuring that the screw remains as stable as ever.

[0013] Preferably, a retaining ring is connected to the inner wall of the planar groove. The inner wall of the retaining ring has a toothed groove, which corresponds to the outer wall texture of the screw and nut to increase the friction between the nut and the planar groove. When the nut is embedded in the planar groove, the toothed groove and the side wall texture of the nut mesh with each other, like "gear meshing," greatly increasing the friction between the nut and the planar groove. This not only increases the difficulty of rotating or pulling out the nut from a physical structure perspective, but also forms a reliable locking effect through mechanical meshing. Even if the product is subjected to severe external force, the toothed groove of the retaining ring can tightly hold the nut, preventing it from shifting or falling off. The retaining ring, the planar groove, and the groove work together to build a three-dimensional anti-loosening system from multiple dimensions, providing comprehensive protection for the stable installation of the screw and effectively solving the problem of traditional screws being easy to loosen and fall off.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0015] By incorporating a raised structure that engages with the screw's threads, the screw is secured. The number of thread layers provides corresponding protection. Even under complex conditions of prolonged vibration, bumps, or frequent opening and closing, the screw's rotation and displacement are effectively suppressed through continuous friction and mechanical locking. Secondly, the recessed groove employs a precise fit design, with the hole diameter and screw diameter error controlled within a minimal range. This ensures a tight fit after screw installation, minimizing the risk of loosening due to gaps. Furthermore, an annular retaining ring structure is added within the planar groove extending from the recessed groove, achieving surface contact between the retaining ring and the nut to form a secure fit. The 360° seamless, wraparound locking design not only increases the contact area between the nut and the product surface, distributing external forces evenly, but also, through a mortise-and-tenon-like interlocking structure, the retaining ring and the flat groove form a rigid support when the screw is subjected to lateral pulling force, effectively resisting external pulling and ensuring the screw stays firmly in place. This further enhances the overall structural stability. The dual protection design complements each other, comprehensively improving the screw's anti-loosening performance from thread engagement to nut fixation, building a reliable safety barrier for products with extremely high safety requirements, such as children's toys and electronic products. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is one of the overall structural schematic diagrams of this utility model;

[0018] Figure 2 This is the second schematic diagram of the overall structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the connection between the retaining ring and the screw in this utility model;

[0020] Figure 4 This is a cross-sectional view of the mounting components of this utility model;

[0021] Figure 5 This is a schematic diagram of the prior art of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Mounting components; 2. Mounting holes; 3. Screws; 4. Slots; 5. Raised structures; 6. Flat slots; 7. Snap rings. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] This utility model provides, for example Figure 1 , Figure 2 and Figure 5 The structure shown includes a screw that is not easily dislodged.

[0026] Mounting component 1 and screw 3 are installed. Screw 3 is installed in mounting hole 2 of mounting component 1 by thread. Mounting component 1 is provided with protruding structure 5 that engages with the thread of screw 3. The protruding structure 5 and the thread of screw 3 are engaged. The number of thread layers corresponds to the number or distribution level of protruding structure 5, so as to prevent screw 3 from loosening and falling off through multi-layer engagement.

[0027] The protruding structure 5 is a toothed structure, and the height of the toothed structure is adapted to the thread height of the screw 3 to achieve a tight engagement.

[0028] The protruding structure 5 is made of elastic material to enhance the tightness of the engagement between the protruding structure 5 and the thread through elastic deformation. The elastic material has excellent flexibility and resilience. When the screw 3 is screwed into the mounting hole 2, as the thread gradually goes deeper, the protruding structure 5 will undergo elastic deformation due to the compression of the thread. The tooth-like structure will closely fit the contour of the thread like a resilient "spring tooth". It not only fills the tiny machining tolerance gap, but also generates additional elastic pressure between the two. This elastic pressure is like countless miniature springs, which continuously act on the contact surface between the thread and the protruding structure 5, further enhancing the tightness of the engagement.

[0029] The mounting component 1 can be made of plastic. The protruding structure 5 and the mounting component 1 are integrally molded by injection molding. This integral molding method not only ensures the dimensional accuracy and positional accuracy of the protruding structure 5 and avoids the assembly errors that may occur in traditional assembly methods, but also significantly enhances the bonding strength between the protruding structure 5 and the mounting component 1, so that the protruding structure 5 will not fall off or loosen under the pressure of screws being screwed in and under the action of external forces during long-term use.

[0030] Specifically, this design breaks away from the limitations of traditional screws that rely solely on the friction of their own threads for fastening. It transforms the friction of a single point of contact into a three-dimensional, surrounding interlocking resistance. In actual use, whether children's toys are subjected to frequent shaking or drops, or electronic products experience severe vibrations during transportation, the multi-layered engagement between screw 3 and the raised structure 5 can continuously counteract the torque generated by external forces, effectively suppressing the rotation and displacement of screw 3. Even if screw 3 shows a slight tendency to loosen due to long-term use, the raised structure 5 will prevent screw 3 from loosening further due to its mechanical blocking effect, ensuring that screw 3 is always firmly held in the mounting hole 2, providing reliable fastening protection for the product structure.

[0031] This utility model provides, for example Figures 3-5 The structure shown is a screw that is not easy to fall out. The front of the mounting component 1 is provided with a groove 4 that is adapted to the screw 3. This ensures that after the screw 3 is tightened, the nut can be completely embedded in the groove 4, effectively avoiding the risk of bumps and external interference caused by the exposed nut. The size of the groove 4 matches the size of the screw 3 and the nut. The outer extension of the groove 4 is provided with a flat groove 6. The flat groove 6 fits against the bottom surface of the nut of the screw 3 to increase the resistance to the screw 3 being pulled out. By increasing the contact area between the two, the pull-out resistance of the screw 3 is significantly improved. The single axial tightening force during the installation of traditional screws is transformed into a composite tightening force with axial and radial synergy. When the screw 3 is subjected to an outward pulling force, the side wall of the flat groove 6 will form a reverse support, restricting the movement of the nut and making it difficult for the screw 3 to be easily pulled out, providing additional safety for the product structure.

[0032] The depth of the flat groove 6 is greater than or equal to half the thickness of the screw 3 and nut. This depth setting ensures that at least half the thickness of the nut can be contained by the flat groove 6, so that the nut and the flat groove 6 form a deep fit. The inner diameter of the flat groove 6 is adapted to the outer diameter of the screw 3 and nut, which not only ensures that the nut can be smoothly inserted, but also achieves interference contact through a small tolerance fit, further enhancing the fastening effect. When the screw 3 is screwed into the mounting part 1, the nut and the inner wall of the flat groove 6 are tightly pressed together, generating a large friction force, which effectively resists the loosening effect of external forces on the screw 3. Whether it is the frequent shaking of children's toys during play or the bumps and impacts encountered by electronic products during transportation, the flat groove 6 can firmly lock the nut with its depth and adapted size, ensuring that the screw 3 is always as stable as ever.

[0033] A retaining ring 7 is connected to the inner wall of the flat groove 6. The inner wall of the retaining ring 7 has toothed grooves that correspond to the outer wall texture of the screw 3 nut to increase the friction between the nut and the flat groove 6. When the nut is embedded in the flat groove 6, the toothed grooves and the side wall texture of the nut mesh with each other, like "gear meshing", which greatly increases the friction between the nut and the flat groove 6. This not only increases the difficulty of turning or pulling out the nut from a physical structure perspective, but also forms a reliable locking effect through mechanical meshing. Even if the product is subjected to severe external force, the toothed groove of the retaining ring 7 can tightly hold the nut to prevent it from shifting or falling off. The retaining ring 7, the flat groove 6, and the groove 4 work together to build a three-dimensional anti-loosening system from multiple dimensions, providing comprehensive protection for the stable installation of the screw 3 and effectively solving the problem of traditional screws being easy to loosen and fall off.

[0034] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A structure in which a screw is not easily detached, comprising a mounting member (1) and a screw (3) which is mounted in a mounting hole (2) of the mounting member (1) by screwing, characterized in that: The mounting component (1) is provided with a protruding structure (5) that engages with the thread of the screw (3). The protruding structure (5) and the thread of the screw (3) are engaged. The number of layers of the thread corresponds to the number or distribution level of the protruding structure (5) so as to prevent the screw (3) from loosening and falling off through multi-layer engagement.

2. The structure of claim 1, wherein: The mounting component (1) has a groove (4) on its front side that is adapted to the screw (3). The size of the groove (4) matches the size of the screw (3) nut. The outer extension of the groove (4) has a flat groove (6). The flat groove (6) fits against the bottom surface of the screw (3) nut to increase the resistance when the screw (3) is pulled out.

3. The structure of claim 1, wherein: The protruding structure (5) is a toothed structure, and the height of the toothed structure is adapted to the thread height of the screw (3) to achieve a tight engagement.

4. The structure of claim 2, wherein: The depth of the flat groove (6) is greater than or equal to 1 / 2 of the thickness of the screw (3) nut, and the inner diameter of the flat groove (6) is adapted to the outer diameter of the screw (3) nut.

5. The structure of claim 4, wherein: The inner wall of the flat groove (6) is connected to a retaining ring (7), and the inner wall of the retaining ring (7) is provided with a toothed groove. The toothed groove corresponds to the outer wall texture of the screw (3) nut to increase the friction between the nut and the flat groove (6).

6. The structure of claim 1, wherein: The protrusion structure (5) is made of an elastic material to enhance the engagement tightness between the protrusion structure (5) and the thread through elastic deformation.

7. The structure of a screw that is not easily dislodged according to claim 1, characterized in that: The mounting component (1) is made of plastic, and the protruding structure (5) and the mounting component (1) are integrally formed by injection molding.

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