A press-in screw with anti-twist locking structure

Abstract

The utility model discloses a kind of compression rivet screws with anti-torsion locking structure, including screw head, recess is set in the downside of screw head, middle part in recess is equipped with stem, the upper end of stem is equipped with multiple embossing teeth, multiple antiskid teeth, annular block, multiple embossing teeth are located in recess, first gap is left between multiple embossing teeth and multiple antiskid teeth, second gap is left between multiple antiskid teeth and annular block, the circumferential side of stem upper end is set with multiple clamping grooves corresponding with second gap. The utility model is through multiple bevels, so that multiple bevels are extruded and are pushed to substrate after deformation, so that multiple extrusion blocks retract into multiple openings, so that substrate after deformation is inserted into multiple clamping grooves and is fixed with clamping, multiple springs drive multiple extrusion blocks to be elastically stretched simultaneously, and also can be clamped and fixed to substrate after deformation, play the role of anti-drop.

Description

Technical Field

[0001] This utility model relates to the field of press-fit screw technology, specifically to a press-fit screw with an anti-torsion locking structure. Background Technology

[0002] Press-fit screws are fasteners used for pressing and riveting. They are generally used in electronic and mechanical equipment, metal sheet metal products, hardware stamping, or materials such as copper, aluminum, and plastic. During use and installation, the threaded end of the press-fit screw, that is, the tail end, needs to be pressed into the product material matrix by stamping or other means.

[0003] A press-fit screw consists of a threaded part and a press-fit part. The threaded part is mainly used to fix the workpiece, while the press-fit part is mainly used to press and fit into the substrate. A through hole of the same size as the threaded part is made on the substrate. The press-fit screw passes through the through hole through the threaded part and is pressed and fixed onto the substrate by a press-fit machine.

[0004] Although rivet screws are used to fix the substrate, if the connection between the rivet screw and the substrate is not tight enough, the rivet screw may wobble or even fall off, affecting the normal use of the workpiece and posing certain safety hazards. Therefore, there is an urgent need to design a rivet screw with an anti-torsion locking structure to solve the above problems. Summary of the Invention

[0005] The purpose of this utility model is to provide a press-fit screw with an anti-torsion locking structure to overcome the above-mentioned shortcomings in the prior art. To achieve the above objective, this utility model provides the following technical solution: A press-fit screw with an anti-torsion locking structure includes a screw head, a groove on the lower side of the screw head, a rod body installed in the center of the groove, and multiple knurled teeth, multiple anti-slip teeth, and an annular block installed on the upper end of the rod body. The multiple knurled teeth are located within the groove, a first gap is left between the multiple knurled teeth and the multiple anti-slip teeth, and a second gap is left between the multiple anti-slip teeth and the annular block. Multiple slots corresponding to the second gap are opened on the circumference of the upper end of the rod body. Multiple openings communicating with the multiple slots are opened inside the upper end of the rod body. Springs are installed inside each of the multiple openings, and a pressing block is installed at one end of each of the multiple springs. An inclined surface is provided on one side of each pair of adjacent pressing blocks, and the adjacent two inclined surfaces correspond to each other. Furthermore, each of the multiple openings has a groove on its inner side, and each of the multiple extrusion blocks has a slider on its two sides. The slider slides within the groove, and a rubber pad is provided on the lower side of the screw head. Furthermore, multiple embossed teeth and multiple anti-slip teeth surround the periphery of the rod body, and an arc-shaped surface is provided on the lower side of the annular block. Furthermore, a threaded groove is provided on the periphery of the rod body, located below the annular block, and a tapered tap is provided at the lower end of the rod body. Furthermore, multiple trapezoidal grooves are provided on the periphery of the screw head, and the extrusion block elastically and slides within the opening. Furthermore, the multiple embossed teeth include an inverted trapezoidal block mounted on the upper end of the rod body and a rectangular block mounted on one side of the inverted trapezoidal block, the rectangular block abutting against the inner side of the groove. In the above technical solution, the rivet screw with an anti-torsion locking structure provided by this utility model has the following beneficial effects: 1. By setting multiple knurled teeth, the multiple knurled teeth can tightly engage with the deformed substrate, thereby improving the anti-torsion force of the rivet screw and effectively reducing the occurrence of wobbling or even falling off the rivet screw, thus improving safety. 2. By setting a first gap and a second gap, after the rivet screw is pressed into the substrate, it is subjected to downward extrusion force, thereby causing it to deform and lock into the first gap and the second gap, effectively improving the fastening effect between the rod and the deformed substrate. 3. By setting multiple inclined surfaces, the deformed substrate can squeeze and push the multiple inclined surfaces, thereby causing the multiple extrusion blocks to retract into the multiple openings, allowing the deformed substrate to extend into the multiple slots for locking and fixing, thereby further improving the anti-torsion force of the rivet screw. 4. At the same time, the multiple springs set can also clamp and fix the deformed substrate while driving the multiple extrusion blocks to elastically extend and retract, playing a role in preventing loosening. Attached Figure Description

[0006] 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. Figure 1 This is a front view of the structure of a press-fit screw with an anti-torsion locking structure according to the present invention. Figure 2 This is a schematic diagram of the screw head structure provided for an embodiment of a press-fit screw with an anti-torsion locking structure according to this utility model. Figure 3 This is a schematic diagram of the groove structure provided for an embodiment of a press-fit screw with an anti-torsion locking structure according to the present invention. Figure 4 This is a schematic diagram of the extrusion block structure provided in an embodiment of a press-fit screw with an anti-torsion locking structure according to this utility model. 1. Screw head; 2. Groove; 3. Rod body; 4. Knitted teeth; 5. Anti-slip teeth; 6. Annular block; 7. First gap; 8. Second gap; 9. Slot; 10. Opening; 11. Spring; 12. Extrusion block; 13. Slider; 14. Arc-shaped surface; 15. Threaded groove; 16. Tapered tap; 17. Trapezoidal groove; 18. Inverted trapezoidal block; 19. Rectangular block. Detailed Implementation

[0007] To enable those skilled in the art to better understand the technical solution of this utility model, a further detailed description of this utility model will be provided below in conjunction with the accompanying drawings. For example... Figure 1-4As shown in the figure, the present invention provides a press-fit screw with an anti-torsion locking structure, including a screw head 1, a groove 2 on the lower side of the screw head 1, a rod 3 installed in the middle of the groove 2, a plurality of knurled teeth 4, a plurality of anti-slip teeth 5, and an annular block 6 installed on the upper end of the rod 3, the plurality of knurled teeth 4 being located in the groove 2, a first gap 7 being left between the plurality of knurled teeth 4 and the plurality of anti-slip teeth 5, a second gap 8 being left between the plurality of anti-slip teeth 5 and the annular block 6, a plurality of slots 9 corresponding to the second gap 8 being opened on the periphery of the upper end of the rod 3, a plurality of openings 10 communicating with the plurality of slots 9 being opened inside the upper end of the rod 3, a spring 11 being installed on the inner side of each of the plurality of openings 10, a pressing block 12 being installed on one end of each of the plurality of springs 11, and a bevel being provided on one side of each of the plurality of adjacent pressing blocks 12, with the adjacent two bevels corresponding to each other. In this embodiment, a screw head 1 is included, with a groove 2 formed on the lower side of the screw head 1. Specifically, multiple trapezoidal grooves 17 are formed on the periphery of the screw head 1, and the pressing block 12 is elastically and slidably fitted within the opening 10. Through the multiple trapezoidal grooves 17, the screw head 1 is tightly engaged with the deformed substrate, thereby reducing the occurrence of screw head 1 rotation and achieving overall anti-torsion of the press-fit screw. In this embodiment, a rod 3 is installed in the middle of the groove 2. Specifically, a threaded groove 15 is formed on the periphery of the rod 3, located below the annular block 6, and a tapered tap 16 is installed at the lower end of the rod 3. In this embodiment, multiple knurled teeth 4, multiple anti-slip teeth 5, and an annular block 6 are installed at the upper end of the rod 3. Specifically, multiple knurled teeth 4 and multiple anti-slip teeth 5 surround the periphery of the rod 3, and an arc-shaped surface 14 is provided on the lower side of the annular block 6. Through the annular block 6, the through hole can be tightly locked, further reducing the occurrence of press-fit screw falling off. In this embodiment, multiple embossed teeth 4 are located in the groove 2, and a first gap 7 is left between the multiple embossed teeth 4 and the multiple anti-slip teeth 5; Specifically, the multiple embossed teeth 4 include an inverted trapezoidal block 18 installed on the upper end of the rod body 3 and a rectangular block 19 installed on one side of the inverted trapezoidal block 18, and the rectangular block 19 abuts against the inner side of the groove 2.In this embodiment, a second gap 8 is left between the multiple anti-slip teeth 5 and the annular block 6. Multiple slots 9 corresponding to the second gap 8 are opened on the periphery of the upper end of the rod body 3. Multiple openings 10 connected to the multiple slots 9 are opened inside the upper end of the rod body 3. Springs 11 are installed on the inner side of each of the multiple openings 10. A pressing block 12 is installed on one end of each of the multiple springs 11. An inclined surface is provided on one side of each of the multiple adjacent pressing blocks 12, and the two adjacent inclined surfaces are opposite each other. Specifically, a sliding groove is opened on the relative inner side of each of the multiple openings 10. A slider 13 is installed on the relative sides of each of the multiple pressing blocks 12. The slider 13 slides in the sliding groove, and a rubber pad is installed on the lower side of the screw head 1. By sliding the slider 13 in the sliding groove, the pressing block 12 can only move up and down within the opening 10, thereby guiding the pressing block 12. The rubber pad can increase the friction with the substrate and further reduce the shaking of the screw head 1. Working steps: During use, the lower end of the rod 3 is inserted into the through hole on the substrate, and then the screw head 1 is pressed down. At this time, the screw head 1 is subjected to the downward impact force and embedded in the substrate, thereby causing the substrate to deform. At the same time, the deformed substrate tightly engages with multiple embossed teeth 4, multiple anti-slip teeth 5, and multiple trapezoidal grooves 17, increasing the contact area and reducing the occurrence of rotation between the rod 3 and the screw head 1. At this time, the deformed substrate extends into the first gap 7 and the second gap 8 for snap-fit ​​fixation. Simultaneously, the deformed substrate compresses multiple inclined surfaces, causing multiple extrusion blocks 12 to slide and engage within multiple openings 10, thus allowing the deformed substrate to extend between multiple adjacent extrusion blocks 12. At this time, multiple sliders 13 slide and engage within multiple grooves, while multiple springs 11 simultaneously perform elastic compression. When the pressure on the screw head 1 is released, the multiple springs 11 provide elastic support for the multiple extrusion blocks 12, and the multiple extrusion blocks 12 clamp and fix the deformed substrate, thereby preventing it from detaching. 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 press-fit screw with an anti-torsion locking structure, comprising a screw head (1), characterized in that, The screw head (1) has a groove (2) on its lower side. A rod (3) is installed in the middle of the groove (2). The upper end of the rod (3) is equipped with multiple knurled teeth (4), multiple anti-slip teeth (5), and an annular block (6). The multiple knurled teeth (4) are located in the groove (2). A first gap (7) is left between the multiple knurled teeth (4) and the multiple anti-slip teeth (5). A second gap (8) is left between the multiple anti-slip teeth (5) and the annular block (6). Multiple slots (9) corresponding to the second gap (8) are opened on the periphery of the upper end of the rod (3). The upper end of the rod (3) has multiple openings (10) that communicate with multiple slots (9). The inner side of each of the multiple openings (10) is equipped with a spring (11). One end of each of the multiple springs (11) is equipped with a pressing block (12). One side of each of the multiple adjacent pressing blocks (12) is provided with an inclined surface, and the two adjacent inclined surfaces correspond to each other.

2. A press-fit screw with an anti-torsion locking structure according to claim 1, characterized in that, Each of the multiple openings (10) has a groove on its inner side, and each of the multiple extrusion blocks (12) has a slider (13) on its two sides. The slider (13) slides in the groove, and a rubber pad is installed on the lower side of the screw head (1).

3. A press-fit screw with an anti-torsion locking structure according to claim 1, characterized in that, Multiple embossed teeth (4) and multiple anti-slip teeth (5) surround the periphery of the rod body (3), and the lower side of the annular block (6) is provided with an arc-shaped surface (14).

4. A press-fit screw with an anti-torsion locking structure according to claim 1, characterized in that, The rod (3) has a threaded groove (15) on its periphery, the threaded groove (15) is located below the annular block (6), and the lower end of the rod (3) is equipped with a tapered tap (16).

5. A press-fit screw with an anti-torsion locking structure according to claim 1, characterized in that, The screw head (1) has multiple trapezoidal grooves (17) on its periphery, and the extrusion block (12) is elastically and slidably fitted in the opening (10).

6. A press-fit screw with an anti-torsion locking structure according to claim 1, characterized in that, The plurality of embossed teeth (4) include an inverted trapezoidal block (18) mounted on the upper end of the rod (3) and a rectangular block (19) mounted on one side of the inverted trapezoidal block (18), wherein the rectangular block (19) abuts against the inner side of the groove (2).

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