Combined anti-theft fastening structure

Abstract

The utility model discloses a combined theftproof fastening structure, include: the one end of stud is equipped with the screw head of the contour as the rotator, and the rotation axis of screw head is collinear with the central axis of stud, and screw head is equipped with n positioning hole around the central axis of stud, and n is the integer greater than 1, and the contour of positioning hole is the rotator, positioning cap is equipped with the shape and the matching of screw head's give way slot, and the positioning pin of n matching positioning hole is equipped in give way slot, and every certain positioning pin is used to connect to the positioning hole in upper, and the one side of positioning cap away from give way slot is equipped with the dismounting screw element. The utility model discloses the outer surface of screw head and the inner surface of positioning hole are all continuous smooth curved surface structure, and the comprehensive reliable theftproof performance is stable and reliable, and the dismounting action is stable and reliable, and the force point position is passed curved surface transmission force, has improved the reliability of long -term repeated use, and the repeated dismounting performance is good, and simple processing can effectively reduce the manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of fastening structures, and in particular to a combined anti-theft fastening structure. Background Technology

[0002] Common mechanical fastening structures include screws and bolts. Threaded fasteners such as screws and bolts achieve the fastening between parts through threaded connections and are widely used in mechanical connections, public facilities, and precision equipment.

[0003] In traditional technologies, some threaded fasteners have slotted or Phillips-shaped grooves at the ends for screwdriver insertion and removal, while others have hexagonal ends for wrench insertion and removal. In public utilities and precision equipment sectors, where unauthorized disassembly needs to be restricted, related technologies use irregularly shaped grooves (such as star-shaped or triangular grooves) at the ends of threaded fasteners to prevent unauthorized disassembly with conventional tools, thus achieving anti-theft protection. However, this structure still carries the risk of being jammed and subjected to torque for forced disassembly when faced with specialized tools, resulting in insufficient anti-theft performance. Furthermore, the complex irregular grooves are difficult to manufacture and costly to produce. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a combined anti-theft fastening structure, in which both the outer and inner contours are force-relieving structures, providing comprehensive and reliable anti-theft effects, and is simple to process and manufacture.

[0005] A combined anti-theft fastening structure according to an embodiment of the present utility model includes: A stud has a screw head at one end with a profile of a body of revolution. The axis of rotation of the screw head is collinear with the central axis of the stud. The screw head has n positioning holes around the central axis of the stud, where n is an integer greater than 1. The profile of the positioning holes is a body of revolution. The positioning cap has a relief groove with a shape that matches the screw head. The relief groove has n positioning pins that match the positioning holes. Each positioning pin is used to be inserted into the corresponding positioning hole. The side of the positioning cap opposite to the relief groove has a disassembly knob.

[0006] In this embodiment, both the screw head and the relief groove are hemispherical.

[0007] In this embodiment, n=3, and the three positioning holes are evenly distributed around the central axis of the stud.

[0008] In this embodiment, both the positioning hole and the positioning pin are cylindrical.

[0009] In this embodiment, the disassembly and assembly knob is a polygonal prism, and the central axis of the disassembly and assembly knob is collinear with the central axis of the positioning cap.

[0010] In this embodiment, the disassembly and assembly knob is provided with a central hole, and one end of the central hole is connected to a clearance groove.

[0011] In this embodiment, a torsion bar is provided on one side of the disassembly and assembly torsion component, and a torsion handle is provided at one end of the torsion bar parallel to the central axis of the disassembly and assembly torsion component.

[0012] In this embodiment, a screwdriver hole is provided on the side of the disassembly and assembly knob that is away from the positioning cap, and the central axis of the screwdriver hole is collinear with the central axis of the positioning cap.

[0013] The embodiments of this utility model have at least the following beneficial effects: By designing both the screw head's contour and the positioning hole's contour as a rotating structure, the outer surface of the screw head and the inner surface of the positioning hole are both continuous and smooth curved surfaces, creating a reliable anti-theft effect. When a rotational force is applied to the outer contour of the screw head or a single positioning hole using conventional disassembly tools, the force direction at the contact point between the tool and the screw head is tangent to the corresponding curved surface, resulting in an effective slippage and force relief effect. The rotating structure, without a direct point of force application, provides anti-disassembly protection against conventional disassembly tools, ensuring comprehensive and reliable anti-theft performance. Multiple positioning pins in the authorized positioning cap are inserted into each positioning hole, thus... Multiple points around the central axis of the stud are simultaneously subjected to torsional force, which can form a smooth torsional drive on the stud, thereby achieving smooth assembly and disassembly. The assembly and disassembly actions are stable and reliable. Moreover, the force application points of the authorized assembly and disassembly are transmitted through curved surfaces, which can effectively avoid stress concentration. This not only effectively reduces the wear of the positioning holes and positioning pins, but also improves the reliability of long-term repeated use. It has good re-assembly and disassembly performance, and the large-area transmission can further improve the stability of the assembly and disassembly actions. The screw head and positioning holes with the outline of a rotating body are easy to process, which can effectively reduce the manufacturing cost of this fastening structure. The structure of the regular rotating body is stable and has a long service life. Attached Figure Description

[0014] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a three-dimensional structural diagram of the combined anti-theft fastening structure according to an embodiment of the present utility model; Figure 2 This is a three-dimensional structural diagram of the combined anti-theft fastening structure according to an embodiment of the present utility model from another perspective. Figure 3 This is a front view schematic diagram of the combined anti-theft fastening structure according to an embodiment of the present utility model; Figure 4 For along Figure 3 A schematic diagram of the cross-sectional structure of line A-A'; Figure 5 This is a three-dimensional structural diagram of the combined anti-theft fastening structure of this utility model embodiment during assembly and disassembly. Figure 6 This is a three-dimensional structural diagram of the combined anti-theft fastening structure of this utility model embodiment during assembly and disassembly from another perspective. Figure 7 This is a three-dimensional structural diagram of the combined anti-theft fastening structure of this utility model embodiment in another application state; Figure 8 This is a three-dimensional structural diagram of the combined anti-theft fastening structure of this utility model in another application state.

[0015] Figure label: Stud 100, screw head 110, positioning hole 111; Positioning cap 200, clearance groove 210, positioning pin 211, disassembly and assembly knob 220, center hole 221, screwdriver hole 222, knob rod 230, knob handle 231. Detailed Implementation

[0016] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0017] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, left, right, front, and back, are based on the orientation or positional relationship shown in the accompanying drawings. 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. Therefore, they should not be construed as limitations on this utility model.

[0018] In the description of this utility model, if the wire sleeve or frame is mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0019] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0020] Screws and bolts, among other threaded fasteners, secure parts together via threaded connections and are widely used in mechanical connections, public utilities, and precision equipment. Traditionally, some threaded fasteners have slotted or Phillips-shaped grooves at the ends for screwdriver insertion and removal, while others have hexagonal ends for wrenches. In public utilities and precision equipment applications, unauthorized disassembly needs to be restricted. Related technologies utilize irregularly shaped grooves, such as star-shaped or triangular grooves, at the ends of threaded fasteners to prevent unauthorized disassembly with conventional tools, thus providing anti-theft protection. However, with the widespread use of these anti-theft structures, corresponding specialized tools have also become more common, significantly reducing their anti-theft performance. The range of protection is limited, and these irregularly shaped grooves still pose a risk of being jammed and subjected to torque for forced disassembly when faced with specialized tools. Furthermore, the complex irregularly shaped grooves are difficult to manufacture, costly to produce, and require stringent strength and precision from specialized tools. Long-term use can also lead to transmission failure due to wear. In addition, some technologies have protective caps or other structures at the ends of threaded fasteners, which require destructive methods to disassemble, cannot be reused, and have high disassembly and reinstallation costs.

[0021] The following is for reference only. Figure 1 To be continued Figure 8 This invention describes a combined anti-theft fastening structure in an embodiment of the present invention. The outer contour of the screw head and the groove structure are both continuous curved surfaces, and both the outer contour and the inner contour are force-relieving structures. The anti-theft effect is comprehensive and reliable, and the processing and manufacturing are simple, which can save manufacturing costs.

[0022] Reference Figures 1 to 8 A combined anti-theft fastening structure according to an embodiment of this utility model includes: The stud 100 has a screw head 110 at one end with an outer contour that is a rotating body structure. The screw head 110, with its circumferentially curved surface, cannot directly withstand rotational forces, effectively preventing the screw head 110 from being directly rotated and disassembled, thus providing good anti-theft performance. The rotation axis of the screw head 110 is collinear with the central axis of the stud 100. The circumferential surface of the stud 100 has a threaded structure spirally arranged around the central axis. The screw head 110 has n positioning holes 111 surrounding the central axis of the stud 100. Each positioning hole 111 surrounds the central axis of the stud 100, effectively ensuring that the combination of at least two positioning holes 111 can cooperate with the positioning cap 200 for disassembly and assembly. The positioning hole 111 has a blind hole structure, where n is an integer greater than 1, i.e., n is at least 2. The internal spatial contour of the positioning hole 111 is a rotating body. Through the positioning hole 111 with its internal spatial contour as a rotating body, the curved surface of the inner wall of the positioning hole 111 cannot directly bear the rotational force, thereby effectively preventing the positioning hole 111 from being directly used for the rotational disassembly of the screw head 110, and providing good anti-theft performance. The positioning cap 200 has a relief groove 210 on one side that matches the shape of the screw head 110. The relief groove 210 has a rotating body structure. The relief groove 210 has n positioning pins 211 that match the positioning holes 111. Each positioning pin 211 is used to be inserted into the corresponding positioning hole 111. The shape, size and position of the positioning pins 211 and the positioning holes 111 are matched to ensure that when the positioning cap 200 is placed on the screw head 110, the screw head 110 passes through the relief groove 210 and each positioning pin 211 is inserted into the corresponding positioning hole 111. The side of the positioning cap 200 away from the relief groove 210 has a disassembly and assembly knob 220. The disassembly and assembly knob 220 is used to provide a force application area for the disassembly and assembly tool, thereby ensuring the smooth completion of the disassembly and assembly knob action.

[0023] A structural reference of a combined anti-theft fastening structure in the separated state according to an embodiment of this utility model. Figures 1 to 4 As shown, the structural reference is used in combination to achieve disassembly and assembly operations. Figure 5 and Figure 6 As shown.

[0024] By designing the contours of both the screw head 110 and the positioning hole 111 as rotating structures, the outer surface of the screw head 110 and the inner surface of the positioning hole 111 are both continuous and smooth curved surfaces, creating a reliable anti-theft effect. When a rotational force is applied to the outer contour of the screw head 110 or to a single positioning hole 111 using conventional disassembly tools, the direction of the force applied at the contact point between the conventional disassembly tools and the screw head 110 is tangent to the corresponding curved surface, resulting in an effective slippage and force relief effect. The rotating structure without a direct point of force application provides anti-disassembly protection against conventional disassembly tools, ensuring comprehensive and reliable anti-theft performance. Specifically: Screw head 110... The outer contour of stud 10 is a rotating body structure with a continuous smooth curved surface in its circumference, making it impossible for conventional tools such as wrenches and pipe wrenches to effectively clamp and apply rotational torque. Secondly, the internal space contour of the positioning hole 111 is also a rotating body structure with a continuous smooth curved surface on its inner wall. Even when a tool is inserted into the positioning hole 111, it cannot obtain effective torque support from the hole wall. This dual rotating structure forms a comprehensive anti-theft barrier, significantly improving anti-theft performance. Multiple positioning pins 211 in the authorized positioning cap 200 are correspondingly inserted into each positioning hole 111, simultaneously applying torque at multiple points around the central axis of the stud 100. The rotating force can generate a smooth torsional drive on the stud 100, thereby achieving smooth assembly and disassembly. The assembly and disassembly actions are stable and reliable. Moreover, the force is transmitted through the curved surface at the force application point, which can effectively avoid stress concentration. This not only effectively reduces the wear of the positioning hole 111 and the positioning pin 211, but also effectively reduces the probability of the fastening structure failing to achieve effective transmission and assembly due to wear, thus improving the reliability of long-term repeated use. It has good repeatability and disassembly performance, and the large-area transmission can further improve the stability of the assembly and disassembly actions. The screw head 110 and the positioning hole 111, which have a rotating body profile, are simple to machine and can be processed by conventional turning, milling, and die-cutting. Obtaining a regular rotating body structure can effectively reduce the manufacturing cost of this fastening structure. The standardized rotating body is also conducive to large-scale production, ensuring product consistency. The regular rotating body structure is stable and has a long service life. With the rotating axis of the screw head 110 collinear with the central axis of the stud 100, and multiple positioning holes 111 evenly distributed around the central axis, when the positioning cap 200 is closed, the positioning pin 211 and the positioning hole 111 can automatically achieve good centering, ensuring balanced force during fastening and disassembly, avoiding problems such as uneven wear and jamming caused by unilateral force, and further improving the smoothness of assembly and disassembly and service life.

[0025] Understandably, both the screw head 110 and the relief groove 210 are hemispherical, and the rotation axis of the hemispherical screw head 110 is collinear with the central axis of the stud 100. The hemispherical structure presents a continuous, smooth, and complex curved surface without parallel edges in all radial dimensions. Conventional wrenches, pipe wrenches, and other tools cannot form an effective clamping force or torque application point on the surface of the hemispherical structure, which can avoid violent disassembly by clamping the outside of the screw head 110, further improving the prevention of unauthorized disassembly and providing good anti-theft performance. In addition, during authorized installation, the hemispherical screw head 110 and the relief groove 210 of the same shape can produce a unique guiding effect. Even if there is an initial alignment deviation, under slight axial pressure, the lateral component force generated by the spherical contact will automatically guide the positioning cap 200 to slide to the precise center position, significantly reducing the installation difficulty and improving the operating efficiency. It is particularly suitable for blind installation or working conditions with poor visibility.

[0026] It should be noted that, in addition to being hemispherical, the screw head 110 and the relief groove 210 can also be designed as a structure with a rotating outer contour, such as a cone or frustum, to achieve the corresponding anti-theft and guiding functions. The design can be adjusted according to actual needs, and the design is highly flexible.

[0027] It is understandable that both the positioning holes 111 and the positioning pins 211 have n=3 holes. The three positioning holes 111 are evenly distributed around the central axis of the stud 100. Through the three evenly distributed positioning holes 111, and correspondingly the three evenly distributed positioning pins 211, a stable and solid positioning structure can be formed. When transmitting torque, the three points bear the force evenly and synchronously. This not only effectively improves the force balance when the positioning cap 200 and the screw head 110 interact, thus effectively improving the stability of disassembly and assembly, but also effectively reduces wear between structures. In addition, the matching relationship between the positioning cap 200 and the screw head 110 is clear, and the evenly spaced arrangement can improve the foolproof performance during disassembly and assembly, enabling quick alignment and insertion, avoiding large stroke and long-term alignment operations, and making installation and use convenient.

[0028] Understandably, both the positioning hole 111 and the positioning pin 211 are cylindrical. The inner wall of the positioning hole 111 is a continuous, smooth curved surface. Even when conventional disassembly tools are inserted into the positioning hole 111 from any direction, it is impossible to find a point of force capable of withstanding significant torque within the hole. This effectively prevents the screw head 110 from being disassembled by prying the hole wall, thus improving the positioning hole 111's effectiveness against unauthorized disassembly. Furthermore, the cylindrical positioning pin 211 has good structural stability, effectively improving the long-term reliability of the overall structure. In addition to being cylindrical, the positioning hole 111 and the positioning pin 211 can also be designed as conical or frustum-shaped rotating structures, providing excellent anti-theft performance.

[0029] Understandably, the disassembly and assembly knob 220 is a polygonal prism, and the central axis of the disassembly and assembly knob 220 is collinear with the central axis of the positioning cap 200. Each positioning pin 211 surrounds the central axis of the positioning cap 200, which can further improve the stability of the disassembly and assembly operation.

[0030] The disassembly and assembly knob 220 can be specifically designed as a regular hexagonal prism. By designing the disassembly and assembly knob 220 to resemble a conventional nut, it facilitates disassembly and assembly operations using tools such as wrenches, effectively improving the convenience and efficiency of disassembly and assembly operations using the authorized positioning cap 200.

[0031] It is understandable that the disassembly and assembly knob 220 is provided with a central hole 221, one end of which is connected to the clearance groove 210, and the other end of which passes through the disassembly and assembly knob 220 and is connected to the external environment.

[0032] The central hole 221 effectively reduces the amount of material used in the positioning cap 200 and the disassembly and assembly knob 220, achieving product lightweighting while meeting structural strength and functional requirements, and reducing material and manufacturing costs. In addition, when the positioning cap 200 is quickly fitted onto the screw head 110, the air in the relief groove 210 is easily compressed due to the rapid formation of positive air pressure. The through central hole 221 enables the relief groove 210 to connect with the external environment, thereby providing a channel for compressed air to release pressure, which can improve the smoothness and stability of the installation action, avoid the impact of significant air pressure difference on normal disassembly and assembly operations, and ensure stable and reliable disassembly and assembly operations.

[0033] It is understood that, in another application state, the combined anti-theft fastening structure of this utility model embodiment, refer to Figure 7 As shown, a torsion bar 230 is provided on one side of the disassembly / reassembly knob 220, and a knob handle 231 parallel to the central axis of the disassembly / reassembly knob 220 is provided at one end of the torsion bar 230. According to actual application requirements, by equipping the disassembly / reassembly knob 220 on the positioning cap 200 with a torsion bar 230 and a knob handle 231, the operator can disassemble and assemble without additional tools. After inserting the positioning cap 200 into the screw head 110, the disassembly / reassembly operation can be completed by turning the knob handle 231, which is particularly suitable for field or emergency maintenance scenarios.

[0034] By connecting the torsion bar 230 to the torsion handle 231, the lever arm can be effectively increased, thereby reducing the force required for disassembly and assembly, making the disassembly and assembly operation simple and labor-saving. In addition, the torsion bar 230 and torsion handle 231, which form a bent structure, can effectively improve the utilization rate of three-dimensional space and occupy little radial space. They can be flexibly used for disassembly and assembly operations in narrow spaces where conventional disassembly and assembly tools such as wrenches cannot be effectively used, thus effectively adapting to different usage scenarios and having a wide range of applications.

[0035] It is understood that, in another application state, the combined anti-theft fastening structure of this utility model embodiment, refer to Figure 8 As shown, the disassembly and assembly knob 220 has a screwdriver hole 222 on the side opposite to the positioning cap 200. The central axis of the screwdriver hole 222 is collinear with the central axis of the positioning cap 200. Each positioning pin 211 surrounds the central axis of the positioning cap 200, which can further improve the stability of disassembly and assembly and reduce jamming or wear caused by unbalanced force on one side.

[0036] Specifically, the disassembly / reassembly knob 220 can be configured as a prism and equipped with a screwdriver hole 222. The knob 220 can be disassembled / reassembled using either a wrench or a screwdriver to adapt to the operational needs of different application scenarios, thus having a wide range of applications. The screwdriver hole 222 can be a flathead or Phillips head hole. When using the authorized positioning cap 200, disassembly / reassembly can be completed using a conventional screwdriver, effectively improving the convenience and flexibility of authorized disassembly / reassembly.

[0037] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A combined anti-theft fastening structure, characterized in that, include: A stud (100) has a screw head (110) at one end with a profile of a rotating body. The rotation axis of the screw head (110) is collinear with the central axis of the stud (100). The screw head (110) has n positioning holes (111) around the central axis of the stud (100), where n is an integer greater than 1. The profile of the positioning holes (111) is a rotating body. The positioning cap (200) has a relief groove (210) that matches the shape of the screw head (110). The relief groove (210) has n positioning pins (211) that match the positioning holes (111). Each positioning pin (211) is used to be inserted into the corresponding positioning hole (111). The positioning cap (200) has a disassembly knob (220) on the side away from the relief groove (210).

2. The combined anti-theft fastening structure according to claim 1, characterized in that, Both the screw head (110) and the relief groove (210) are hemispherical.

3. The combined anti-theft fastening structure according to claim 1, characterized in that, n=3, and the three positioning holes (111) are evenly distributed around the central axis of the stud (100).

4. The combined anti-theft fastening structure according to claim 1, characterized in that, Both the positioning hole (111) and the positioning pin (211) are cylindrical.

5. The combined anti-theft fastening structure according to claim 1, characterized in that, The assembly / disassembly knob (220) is a polygonal prism, and the central axis of the assembly / disassembly knob (220) is collinear with the central axis of the positioning cap (200).

6. The combined anti-theft fastening structure according to claim 1, characterized in that, The disassembly and assembly knob (220) is provided with a central hole (221), one end of which is connected to the relief groove (210).

7. The combined anti-theft fastening structure according to claim 1, characterized in that, The disassembly and assembly knob (220) has a knob rod (230) on one side, and a knob handle (231) parallel to the central axis of the disassembly and assembly knob (220) is provided at one end of the knob rod (230).

8. The combined anti-theft fastening structure according to claim 1, characterized in that, The disassembly and assembly knob (220) has a screwdriver hole (222) on the side opposite to the positioning cap (200), and the central axis of the screwdriver hole (222) is collinear with the central axis of the positioning cap (200).

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