One-way anti-theft screw with tapping structure

Abstract

The utility model discloses a one-way anti-theft screw with a tapping structure, which is characterized in that the one-way anti-theft screw comprises a cylinder and a screw head, the screw head is connected to the top end of the cylinder, the cylinder is provided with a thread tooth part spirally extending along the locking direction, the edge of the thread tooth part is provided with a tapping blade, and the bottom end of the cylinder is provided with a tapping conical head part; two fastening protruding blocks are arranged on the side, away from the column body, of the screw head in a spaced mode, the two fastening protruding blocks are in central symmetry about the axis of the column body, a positioning plane is arranged on the side, close to the axis of the column body, of each fastening protruding block, the two positioning planes are sequentially arranged in the locking direction, and the projections of the two positioning planes on the xz plane intersect. Each fastening protruding block is provided with a guide curved surface, the guide curved surfaces are connected with the top faces of the fastening protruding blocks and the top face of the screw head, and the two guide curved surfaces are sequentially arranged in the direction opposite to the locking direction. According to the utility model, the effect of only one-way rotation driving can be achieved, the mounting efficiency is high, and the effects of tapping and tightening mounting are good.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-theft screws, in particular to a one-way anti-theft screw with a tapping structure. Background Art

[0002] A one-way anti-theft screw, also known as a one-way screw, an anti-disassembly screw, a one-way locking screw, etc., belongs to a special screw and is applied to products with safety requirements. It can only be screwed in one direction and belongs to an anti-tampering part.

[0003] In outdoor equipment, public facilities or occasions with high security requirements, unauthorized disassembly may cause equipment damage, data leakage or safety hazards. Such equipment and facilities are often enclosed and installed by welding, riveting or one-way anti-theft screws. When installing a one-way anti-theft screw, it is necessary to open a hole in the target substrate, and then tighten and install the one-way anti-theft screw into the hole of the target substrate. The installation operation is cumbersome, the installation cost is high, and the installation efficiency is low. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a one-way anti-theft screw with a tapping structure, which has the functions of tapping and threading, is simple and convenient to operate, has high installation efficiency, and the installation action is stable and reliable.

[0005] A one-way anti-theft screw with a tapping structure according to an embodiment of the utility model includes a column body and a screw head. The screw head is connected to the top end of the column body. The column body extends along the z-axis direction. The circumferential surface of the column body is provided with thread teeth spirally extending along the locking direction. A tapping blade is provided at the edge of the thread teeth away from the column body. A tapping cone head is provided at the bottom end of the column body;

[0006] On the side of the screw head away from the column body, there are two fastening protrusions arranged at intervals along the y-axis direction. The two fastening protrusions are centrosymmetric about the axis of the column body. A positioning plane is provided on one side of each fastening protrusion close to the axis of the column body. The two positioning planes are arranged in sequence along the locking direction. The two positioning planes are both parallel to the xz plane. The projections of the two positioning planes on the xz plane intersect. Each fastening protrusion is provided with a guiding curved surface in the x-axis direction. The guiding curved surface connects the top surface of the fastening protrusion and the top surface of the screw head. The two guiding curved surfaces are arranged in sequence along the direction opposite to the locking direction. The projections of the two guiding curved surfaces on the xz plane are spaced apart.

[0007] In this embodiment, a plurality of positioning claws are provided at the bottom of the screw head.

[0008] In this embodiment, the bottom of the positioning claw is a sharp cone.

[0009] In this embodiment, anti-slip textures are provided on each positioning plane.

[0010] In this embodiment, the anti-slip texture extends in a direction perpendicular to the horizontal plane.

[0011] In this embodiment, the positioning plane is covered with an anti-slip layer.

[0012] In this embodiment, the guiding curved surface is an arc surface that is recessed inward at the center.

[0013] In this embodiment, a receiving groove is provided on one side of the column body, and the receiving groove penetrates through a threaded tooth portion along the z-axis direction.

[0014] The embodiment of the present utility model has at least the following beneficial effects:

[0015] By providing a fastening protrusion with a positioning plane and a guiding curved surface on adjacent two sides on the screw head, an effect of only allowing unidirectional rotational driving can be formed. When using tools such as a flat screwdriver, it can only drive the rotation of this unidirectional anti-theft screw along the locking direction to lock it to the target substrate. When rotating in a direction opposite to the locking direction, the guiding curved surface can form an effect of guiding and slipping off, making it difficult to unscrew and loosen this unidirectional anti-theft screw. The two guiding curved surfaces separated by projection can reduce the contact area between the flat screwdriver and the guiding curved surface, and can further improve the performance of the guiding curved surface to form guiding and slipping off, with good anti-theft performance. By matching a tapping cone head with a threaded tooth portion provided with tapping cutting edges, it can automatically complete tapping, threading, and tightening installation, without the need to use additional tools for tapping, simplifying the installation steps, reducing the installation cost, having high installation efficiency, and at the same time reducing potential damage to the target substrate; in addition, by setting the projections of the two positioning planes on the xz plane to overlap, when tightening and installing along the locking direction, the contact area between the flat screwdriver and the positioning plane can be effectively increased, the structure between the fastening protrusion and the screw head is stable and firm, the transmission effect of the driving force during tapping can be effectively improved, thereby effectively improving the stability and reliability of the tapping operation, and moreover, the two positioning planes with overlapping projections cooperate with the central symmetry setting of the fastening protrusion, and can form a good collimation adjustment effect on the flat screwdriver during the rotation process, with good anti-offset performance and good tapping and tightening installation effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, where:

[0017] Figure 1 is a three-dimensional structural schematic diagram of a unidirectional anti-theft screw with a tapping structure according to an embodiment of the present utility model;

[0018] Figure 2 is a three-dimensional structural schematic diagram of a unidirectional anti-theft screw with a tapping structure according to an embodiment of the present utility model from another perspective;

[0019] Figure 3 Schematic diagram of the three-dimensional structure of the one-way anti-theft screw with a tapping structure according to an embodiment of the present invention from another perspective;

[0020] Figure 4 Top view structure diagram of the one-way anti-theft screw with a tapping structure according to an embodiment of the present invention;

[0021] Figure 5 Top view structure diagram of the one-way anti-theft screw with a tapping structure according to another embodiment of the present invention.

[0022] Reference numerals:

[0023] Cylinder 1000, thread tooth part 1100, tapping blade 1110, tapping cone head 1200, receiving groove 1300;

[0024] Screw head 2000, fastening convex block 2100, positioning plane 2110, anti-slip texture 2111, guiding curved surface 2120, positioning claw 2200, anti-slip layer 2300. Detailed implementation manners

[0025] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0026] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, left, right, front, back, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0027] In the description of the present invention, if the first and the second are described only for the purpose of distinguishing technical features, they should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0028] In the description of the present invention, unless otherwise clearly defined, words such as setting, installing, and connecting should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0029] The one-way anti-theft screw, also known as one-way screw, anti-disassembly screw, one-way locking screw, etc., belongs to special screws and is applied to products with safety requirements. It can only be locked in one direction and belongs to anti-tampering parts. In outdoor equipment, public facilities or occasions that require high security, unauthorized disassembly may cause equipment damage, data leakage or safety hazards. Such equipment and facilities are often installed in a closed manner by welding, riveting or one-way anti-theft screws. When installing the one-way anti-theft screw, it is necessary to drill a hole in the target substrate, and then tighten and install the one-way anti-theft screw into the hole of the target substrate. The installation operation is cumbersome, the installation cost is high, the installation efficiency is low, and this installation method is also very easy to damage the target substrate and easily reduce the stability of the structure after installation. At present, the market urgently needs a screw product that can prevent unauthorized disassembly, simplify the installation process and improve the installation efficiency.

[0030] The following refers to the attached Figure 1 to the attached Figure 5 , describe the one-way anti-theft screw with a tapping structure in the embodiment of the present invention, which has a tapping and threading function, simple installation operation, high installation efficiency, and stable and reliable installation action.

[0031] Refer to Figures 1 to 5 , a one-way anti-theft screw with a tapping structure in the embodiment of the present invention includes a column body 1000 and a screw head 2000. The screw head 2000 is fixedly connected to the top end of the column body 1000. Preferably, the screw head 2000 and the column body 1000 are integrally formed. The column body 1000 extends along the z-axis direction. The column body 1000 is a cylinder 1000 with the z-axis as the axis. The circumferential surface of the column body 1000 is provided with thread teeth 1100 that spiral and extend from top to bottom along the locking direction. The locking direction can be clockwise or counterclockwise. A threading blade 1110 is provided at the edge of the thread teeth 1100 away from the column body 1000. A tapping cone head 1200 is provided at the bottom end of the column body 1000;

[0032] On one side of the screw head 2000 away from the column body 1000, there are two fastening bumps 2100 arranged at intervals along the y-axis direction. The fastening bumps 2100 are arranged at the top of the screw head 2000. The two fastening bumps 2100 are centrosymmetric about the axis of the column body 1000. The screw head 2000 is a flat cylinder 1000, and the axes of the column body 1000 and the screw head 2000 are collinear. A clamping groove for inserting an external flat screwdriver is formed between the two fastening bumps 2100. On one side of each fastening bump 2100 close to the axis of the column body 1000, there is a positioning plane 2110. The positioning plane 2110 is arranged on the side part of the fastening bump 2100 in the y-axis direction. The two positioning planes 2110 are arranged in sequence along the locking direction. The two positioning planes 2110 are both parallel to the xz plane. The two positioning planes 2110 successively block the rotation path in the rotation direction. The projections of the two positioning planes 2110 on the xz plane intersect but do not overlap. By arranging the two positioning planes 2110 to overlap in the spatial projection, the contact area between the flat screwdriver and the two positioning planes 2110 can be increased, thereby effectively reducing the problem of loosening between the flat screwdriver and the positioning plane 2110. Moreover, even if there is an offset between the flat screwdriver and the fastening bump 2100, through the two spatially overlapping positioning planes 2110 and the two centrosymmetric fastening bumps 2100, the contact effect between the flat screwdriver and the positioning plane 2110 can be effectively ensured, and the position between the flat screwdriver and the fastening bump 2100 can be automatically adjusted during the process of rotary tapping installation. In addition, by setting the projections of the two fastening bumps 2100 on the xz plane to overlap, the fixed area between the fastening bump 2100 and the screw head 2000 can be effectively increased, and the stability of the connection effect between the screw head 2000 and the column body 1000 can be effectively improved. On the side part of each fastening bump 2100 in the x-axis direction, there is a guiding curved surface 2120. The guiding curved surface 2120 is bent around the y-axis as the axis. The guiding curved surface 2120 connects the top surface of the fastening bump 2100 and the top surface of the screw head 2000. The two guiding curved surfaces 2120 are arranged in sequence along the direction opposite to the locking direction. The two guiding curved surfaces 2120 are successively arranged on the rotation path opposite to the rotation direction. The guiding curved surface 2120 is used to guide the flat screwdriver rotating in the direction opposite to the locking direction from the clamping groove to the top surface of the fastening bump 2100, so as to reduce the probability of the flat screwdriver loosening the screw in the direction opposite to the locking direction. The projections of the two guiding curved surfaces 2120 on the xz plane are spaced apart, and the projections of the two guiding curved surfaces 2120 on the yz plane are also spaced apart, which can effectively reduce the contact area between the flat screwdriver and the guiding curved surface 2120 when the flat screwdriver rotates in the direction opposite to the locking direction. Through the contact effect of a small area and the guiding function of the guiding curved surface 2120, the probability of the flat screwdriver loosening the screw in the direction opposite to the locking direction can be significantly reduced.

[0033] By providing fastening bumps 2100 on the screw head 2000 with adjacent surfaces being a positioning plane 2110 and a guiding surface 2120 respectively, and the two fastening bumps 2100 being centrosymmetric about the axis of the cylinder 1000, and the two positioning planes 2110 and the two guiding surfaces 2120 being arranged to match the locking direction of the thread, an effect of only allowing one-way rotational drive can be formed. When using tools such as a flat-head screwdriver, the one-way anti-theft screw can only be driven to rotate in one direction along the locking direction, so as to be tightened and installed onto the target substrate. When the flat-head screwdriver is rotated in a direction opposite to the locking direction, the guiding surface 2120 can form an effect of guiding and slipping, making it difficult to unscrew and loosen the one-way anti-theft screw. The two separated guiding surfaces 2120 in projection can reduce the contact area between the flat-head screwdriver and the guiding surface 2120, further improving the performance of the guiding surface 2120 to form guiding and slipping, and further reducing the probability of the flat-head screwdriver loosening the screw in a direction opposite to the locking direction, greatly increasing the difficulty of unauthorized disassembly and having good anti-theft performance. By setting a tapping cone head and a thread part 1100 provided with tapping cutting edges 1110, the tapping and threading as well as the tightening and installation can be automatically completed without using additional tools for tapping, simplifying the installation steps, reducing the installation cost, having high installation efficiency, and at the same time reducing potential damage to the target substrate;

[0034] In addition, by setting the projections of the two positioning planes 2110 on the xz plane to overlap, when tightening and installing along the locking direction, the contact area between the flat-head screwdriver and the positioning plane 2110 can be effectively increased, and the reliability of the tightening and installation action is high. The structure between the fastening bump 2100 and the screw head 2000 is stable and firm. Especially when tapping the target substrate, the transmission effect of the driving force during tapping can be effectively improved, thereby effectively improving the stability and reliability of the tapping action. Moreover, the two positioning planes 2110 with overlapping projections and the centrosymmetric setting of the fastening bump 2100 can form a good collimation adjustment effect on the flat-head screwdriver during the rotation process, having good anti-offset performance, and good and efficient tightening and installation effects.

[0035] It can be understood that several positioning claws 2200 are provided at the bottom of the screw head 2000, and the positioning claws 2200 are evenly distributed along the circumferential trajectory around the axis of the cylinder 1000 at the bottom of the screw head 2000. The positioning claws 2200 are used to embed into the surface of the target substrate, which can effectively improve the positioning effect of installing the one-way anti-theft screw onto the target substrate, and the structure is stable and firm.

[0036] It can be understood that the positioning claw 2200 is a sharp cone with the tip facing downwards at the bottom, and the sharp cone of the positioning claw 2200 is inclined from top to bottom along the locking direction. The inclined sharp cone from top to bottom along the locking direction can improve the reliability of the action of the positioning claw 2200 embedding into the target substrate, effectively improve the effect of tight positioning, and improve the firmness of the overall structure.

[0037] It can be understood that each positioning plane 2110 is provided with anti-slip textures 2111. Through the anti-slip textures 2111, the effect of the flat-blade screwdriver contacting the positioning plane 2110 and driving the fastening bump 2100 can be effectively improved, the friction between the flat-blade screwdriver and the positioning plane 2110 can be effectively increased, and the reliability of the tightening and installation operation can be further improved.

[0038] It can be understood that the anti-slip textures 2111 extend in a direction perpendicular to the horizontal plane. By arranging the longitudinal anti-slip textures 2111, when rotating in the locking direction, the anti-slip effect between the flat-blade screwdriver and the positioning plane 2110 can be effectively improved, and the stability of the installation operation can be further improved.

[0039] It can be understood that, as shown in Figure 5 a anti-slip layer 2300 is covered on the positioning plane 2110. The anti-slip layer 2300 can be set as a rubber layer or a silica gel layer. Through the anti-slip layer 2300, the friction between the flat-blade screwdriver and the positioning plane 2110 can be significantly increased. When the flat-blade screwdriver approaches the positioning plane 2110 and rotates in the locking direction, the operation has high stability and good installation effect. Especially in the high-resistance installation scenario of tapping, the stability of the tapping operation can be effectively improved through the anti-slip layer 2300.

[0040] It can be understood that the guiding curved surface 2120 is an arc surface sunken inward at the center. Preferably, the guiding curved surface 2120 can be a circular arc surface or a parabolic arc surface. By setting the center of the guiding curved surface 2120 to be sunken inward, a good guiding effect from bottom to top can be formed, the slipping guiding effect of the guiding curved surface 2120 on the flat-blade screwdriver can be effectively improved, and the anti-theft performance of one-way tightening and anti-loosening can be further improved.

[0041] It can be understood that a storage groove 1300 is provided on one side of the column 1000. The storage groove 1300 penetrates and divides the threaded tooth part 1100 along the z-axis direction. Through the storage groove 1300, the waste generated during the tapping process can be effectively stored, and the accumulation of waste between the threaded tooth part 1100 and the hole wall of the target substrate can be significantly avoided, thereby effectively improving the stability of the installation structure after tapping.

[0042] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A one-way anti-theft screw with a tapping structure, characterized in that, It includes a cylinder (1000) and a screw head (2000). The screw head (2000) is connected to the top end of the cylinder (1000). The cylinder (1000) extends along the z-axis direction. The circumferential surface of the cylinder (1000) is provided with thread teeth (1100) spirally extending in the locking direction. A tapping blade (1110) is provided at the edge of the thread teeth (1100) away from the cylinder (1000). A tapping cone head (1200) is provided at the bottom end of the cylinder (1000). On the side of the screw head (2000) away from the cylinder (1000), there are two fastening bumps (2100) spaced apart along the y-axis direction. The two fastening bumps (2100) are centrosymmetric about the axis of the cylinder (1000). On the side of each fastening bump (2100) close to the axis of the cylinder (1000), there is a positioning plane (2110). The two positioning planes (2110) are arranged in sequence along the locking direction. The two positioning planes (2110) are both parallel to the xz plane. The projections of the two positioning planes (2110) on the xz plane intersect. On each fastening bump (2100) in the x-axis direction, there is a guiding curved surface (2120). The guiding curved surface (2120) connects the top surface of the fastening bump (2100) and the top surface of the screw head (2000). The two guiding curved surfaces (2120) are arranged in sequence along the direction opposite to the locking direction. The projections of the two guiding curved surfaces (2120) on the xz plane are spaced apart.

2. The one-way anti-theft screw with a tapping structure according to claim 1, characterized in that, A number of positioning claws (2200) are provided at the bottom of the screw head (2000).

3. The one-way anti-theft screw with a tapping structure according to claim 2, characterized in that, The positioning claw (2200) has a pointed cone at the bottom.

4. A one-way anti-theft screw with a tapping structure according to claim 1, characterized in that Each positioning plane (2110) is provided with anti-slip texture (2111).

5. The one-way anti-theft screw with a tapping structure according to claim 4, characterized in that, The anti-slip texture (2111) extends in a direction perpendicular to the horizontal plane.

6. The one-way anti-theft screw with a tapping structure according to claim 4, characterized in that, An anti-slip layer (2300) covers the positioning plane (2110).

7. The one-way anti-theft screw with a tapping structure according to claim 1, wherein The guiding curved surface (2120) is an arc surface with a central inward depression.

8. The one-way anti-theft screw with a tapping structure according to claim 1, characterized in that, A receiving groove (1300) is provided on one side of the cylinder (1000). The receiving groove (1300) penetrates the thread teeth (1100) along the z-axis direction.

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