Tamper-proof screw, locking tool and screw locking tool set

Abstract

An anti-removal screw, a locking tool and a screw locking tool set, wherein the screw locking tool set includes the anti-removal screw and the locking tool. The locking tool includes a handle and a positioning pin. The handle includes a locking ratchet structure. The positioning pin includes a convex column. The anti-removal screw includes a screw body and a snap structure. The screw body has an anti-removal ratchet structure and a screw head inner hole that can mesh with the locking ratchet structure. The snap structure is installed in the screw head inner hole and defines an engagement groove and a limiting groove that communicates with the engagement groove and extends along the disassembly direction. The convex column passes through the limiting groove, so that the anti-removal ratchet structure cannot be misaligned relative to the locking ratchet structure, and can be driven by the handle to rotate in the disassembly direction. In this way, the anti-removal screw needs to be disassembled through the locking tool, so the purpose of good anti-theft effect can be achieved.

Description

Technical Field

[0001] The invention relates to an anti-disassembly screw and a locking tool thereof, in particular to an anti-theft anti-disassembly screw, a locking tool suitable for disassembling and assembling the anti-theft anti-disassembly screw, and a screw locking tool set comprising the anti-disassembly screw and the locking tool thereof. Background Art

[0002] Existing screws can usually be removed using a regular screwdriver, so that when the device is installed in an external area with existing screws, it can be easily removed and there is a risk of theft. Therefore, how to prevent the screws from being easily removed has become a topic worth studying for manufacturers. Summary of the invention

[0003] The purpose of the present invention is to provide an anti-theft screw with good anti-tampering effect.

[0004] The anti-disassembly screw of the present invention is suitable for use with a locking tool to be disassembled and assembled on an external structure. The locking tool comprises a handle and a positioning screw pin. The handle comprises a grip portion and a locking ratchet structure arranged at the front end of the grip portion. The positioning screw pin comprises a rod body extending axially and pivotally penetrating the handle, and at least one protrusion extending radially from the front end of the rod body. The protrusion is exposed outside the locking ratchet structure.

[0005] The anti-disassembly screw comprises a screw body and a buckle structure. The screw body comprises a screw head and a screw rod extending forward from the front side of the screw head and being able to penetrate the external structure. The screw head has an anti-disassembly ratchet structure located at the rear side, and an inner hole of the screw head whose opening is surrounded by the anti-disassembly ratchet structure. The anti-disassembly ratchet structure is suitable for engaging with the locking ratchet structure.

[0006] The buckle structure is installed in the inner hole of the screw head and includes a base wall and a surrounding wall extending backward from the outer edge of the base wall. The base wall and the surrounding wall define a connection groove opening backward. The surrounding wall forms at least one limiting groove connected to the connection groove and extending along the disassembly direction. The limiting groove is spaced from the rear side of the surrounding wall. The connection groove is suitable for the boss to be displaceably inserted into the limiting groove to limit the handle from axial displacement.

[0007] When the anti-disassembly ratchet structure is meshed with the locking ratchet structure, the screw body can be driven by the handle to rotate with the rod body as the axis in a locking direction opposite to the disassembly direction. When the anti-disassembly ratchet structure is meshed with the locking ratchet structure, and the limiting groove is for the protrusion to penetrate, so that the anti-disassembly ratchet structure cannot be misaligned with the locking ratchet structure, the screw body can be driven by the handle to rotate with the rod body as the axis in the disassembly direction.

[0008] The anti - disassembling screw of the present invention, the locking ratchet structure has several force - applying surfaces that extend along the length direction of the holding part and are arranged at annular intervals, and several abutting surfaces that are respectively located between two adjacent force - applying surfaces. The abutting surface extends obliquely relative to the force - applying surface. The anti - disassembling ratchet structure has several force - receiving surfaces that extend backward and are arranged at annular intervals, and several sliding surfaces that are respectively located between two adjacent force - receiving surfaces. The inclination of the sliding surface corresponds to that of the abutting surface. When the force - receiving surfaces of the screw body are continuously abutted by the force - applying surfaces of the handle, the screw body can be driven by the handle to rotate in the locking direction. When the sliding surfaces of the screw body are continuously abutted by the abutting surfaces of the handle, and the convex column penetrates into the limiting groove, so that the handle cannot axially displace along the sliding surface, the screw body can be driven by the handle to rotate in the disassembling direction.

[0009] For the anti - disassembling screw of the present invention, the positioning pin includes two convex columns that radially extend from both sides of the front end of the rod body. Two limiting grooves that communicate with the connecting groove and extend along the disassembling direction are respectively formed on both sides of the surrounding wall. The connecting groove has a main groove part defined by the base wall and the surrounding wall and suitable for the rod body to penetrate into, and two positioning groove parts formed at the rear side of the surrounding wall and communicating with the main groove part. The positioning groove parts respectively communicate with the limiting grooves and allow the convex columns to displaceably penetrate into the limiting grooves to limit the handle from axially displacing.

[0010] Another object of the present invention is to provide a locking tool that can cooperate with the aforementioned anti - disassembling screw and is convenient to use.

[0011] The locking tool of the present invention is suitable for disassembling and assembling the anti - disassembling screw on an external structure. The anti - disassembling screw includes a screw body and a snap - fit structure. The screw body includes a screw head and a screw rod that extends forward from the front side of the screw head and can penetrate through the external structure. The screw head has an anti - disassembling ratchet structure at the rear side and a screw - head inner hole whose opening is surrounded by the anti - disassembling ratchet structure. The snap - fit structure is installed in the screw - head inner hole and includes a base wall and a surrounding wall that extends backward from the outer edge of the base wall. The base wall and the surrounding wall define a connecting groove with an opening facing backward. The surrounding wall forms at least one limiting groove that communicates with the connecting groove and extends along the disassembling direction. The limiting groove is spaced from the rear side surface of the surrounding wall.

[0012] The locking tool includes a handle and a positioning pin. The handle includes a holding part, a pivot groove that penetrates through the holding part from front to back, and a locking ratchet structure that is arranged at the front end of the holding part and surrounds the opening of the pivot groove. The locking ratchet structure is suitable for meshing with the anti - disassembling ratchet structure.

[0013] The positioning dowel includes a rod body axially extending and pivotally penetrating into the pivot groove, and at least one lug radially extending from the front end of the rod body. The lug is exposed outside the locking ratchet structure and is displaceably inserted into the connection groove to the limiting groove to limit the handle from axially displacing.

[0014] Wherein, when the locking ratchet structure engages with the anti-disassembly ratchet structure, the handle can drive the screw body to rotate in the locking direction opposite to the disassembly direction with the rod body as the axis. When the locking ratchet structure engages with the anti-disassembly ratchet structure and the lug penetrates into the limiting groove, such that the locking ratchet structure cannot be misaligned relative to the anti-disassembly ratchet structure, the handle can drive the screw body to rotate in the disassembly direction with the rod body as the axis.

[0015] For the locking tool of the present invention, the snap structure is pivotally installed in the inner hole of the screw head. The connection groove has at least one positioning groove portion extending forward from the rear side of the surrounding wall. The handle further includes at least one block protruding forward from the front end of the holding portion. The block is adapted to penetrate into the positioning groove portion to limit the snap structure from pivoting.

[0016] For the locking tool of the present invention, the locking tool further includes a pivot handle pivotally installed at the rear end of the holding portion. The pivot handle is connected to the end of the rod body away from the lug. When the pivot handle rotates with the rod body as the axis, it can drive the lug to move in the limiting groove.

[0017] For the locking tool of the present invention, the pivot handle has an axially extending connection convex portion and at least one radially extending positioning convex portion. On the side of the holding portion away from the locking ratchet structure, there are formed an axially extending handle connection groove and at least one handle limiting groove communicating with the handle connection groove and extending along the disassembly direction. The handle connection groove allows the positioning convex portion to penetrate into the handle limiting groove, such that when the pivot handle rotates in the disassembly direction, it can abut against the groove wall of the handle limiting groove to drive the handle to rotate.

[0018] Another object of the present invention is to provide a screw locking tool set with good anti-theft effect and convenient use.

[0019] The screw locking tool set of the present invention includes the aforementioned anti-disassembly screw and the aforementioned locking tool. The locking tool is used in cooperation with the anti-disassembly screw.

[0020] The beneficial effects of the present invention are as follows: The convex posts respectively rotate and penetrate into the corresponding engagement grooves along the disassembly direction through the limiting grooves, so that the anti-disassembly ratchet structure cannot be misaligned relative to the locking ratchet structure, and can be driven by the pivot handle to rotate in the disassembly direction. In this way, in the case of using general tools (without positioning pins), even if they can engage with the anti-disassembly ratchet structure, the anti-disassembly screws still cannot be disassembled. That is to say, the anti-disassembly screws need to be disassembled by the locking tool with the positioning pins, so the purpose of excellent anti-theft effect can be achieved. In addition, the pivot handle cooperates with the handle to drive the screw body to rotate in the locking direction or the disassembly direction around the rod body as the axis. Therefore, the user can assemble or disassemble the anti-disassembly screws by simply holding the pivot handle with one hand, achieving the effect of convenient use. Further, when the user disassembles the anti-disassembly screws, the pivot handle can also be rotated with one hand to drive the positioning pins to rotate, so that the convex posts respectively penetrate into the limiting grooves and rotate synchronously with the handle, making the use of the locking tool more simple and achieving the effect of convenient use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein:

[0022] Figure 1 is a perspective view showing the use relationship between the embodiment of the screw locking tool set of the present invention and the external structure;

[0023] Figure 2 is an exploded perspective view showing the external structure, the anti-disassembly screw and the locking tool of the embodiment;

[0024] Figure 3 is a perspective view from another angle showing the connection relationship between the external structure, the anti-disassembly screw and the locking tool;

[0025] Figure 4 is the same as Figure 3 the exploded perspective view from the same angle showing the external structure, the anti-disassembly screw and the locking tool;

[0026] Figure 5 is a left view showing the locking tool driving the anti-disassembly screw to rotate in the locking direction, and the screw head of the anti-disassembly screw abuts against the external structure;

[0027] Figure 6 is a left view showing the locking tool driving the anti-disassembly screw to rotate in the disassembly direction, and the screw head is spaced from the external structure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Refer to Figures 1 to 4, which is an embodiment of the screw-locking tool set of the present invention. The screw-locking tool set includes an anti-tamper screw 1 and a locking tool 4 used in cooperation with the anti-tamper screw 1. The locking tool 4 is suitable for screwing the anti-tamper screw 1 onto an external structure 9, and can also unscrew and remove the anti-tamper screw 1 from the external structure 9. The external structure 9 can be a structure such as a casing, a wall surface, etc. that needs to be assembled or installed and fixed, but is not limited to a specific form. In this embodiment, although the number of the anti-tamper screw 1 and the locking tool 4 is taken as an example of one each, in various situations such as use, manufacturing, and selling, the number of the anti-tamper screw 1 and the locking tool 4 of the screw-locking tool set is not limited to a specific combination, and shall be determined according to actual needs.

[0029] Refer to Figures 3 to 5 , and first define the directional terms of the content described herein. In Figure 5 , the right side of the locking tool 4 is defined as the "front side", the left side of the locking tool 4 is defined as the "rear side", and the axial direction X and the radial direction r of the locking tool 4 are defined. The locking tool 4 includes a handle 5, a positioning pin 6 pivotally inserted through the handle 5 and having one end exposed at the front end of the handle 5, and a pivot handle 7 connected to the rear end of the positioning pin 6 and pivotally installed at the rear end of the handle 5. The handle 5 includes a gripping portion 51, a locking ratchet structure 52 provided at the front end of the gripping portion 51 and surrounding the positioning pin 6, a pivot groove 53 penetrating through the gripping portion 51 in the front-rear direction and having an opening surrounded by the locking ratchet structure 52, and two blocks 54 protruding forward from the front end of the gripping portion 51 and exposed outside the locking ratchet structure 52. A handle connection groove 511 extending axially (extending along the axial direction X) is formed on the rear side surface of the gripping portion 51, and two handle limiting grooves 512 respectively communicating with both sides of the handle connection groove 511 and extending along a disassembly direction φ are formed. In this embodiment, the number of the blocks 54 and the number of the handle limiting grooves 512 can also be one or more than three, and is not limited to a specific number.

[0030] The locking ratchet structure 52 is serrated and has several force-applying surfaces 521 extending along the length direction of the gripping portion 51 and arranged at annular intervals, and several abutting surfaces 522 respectively located between two adjacent force-applying surfaces 521. The abutting surface 522 extends obliquely with respect to the force-applying surface 521. In this embodiment, the force-applying surface 521 extends along the axial direction of the positioning pin 6 (extending along the axial direction X), so that when the locking ratchet structure 52 pivots around the positioning pin 6, the force-applying surface 521 can apply force to rotate with the maximum torque.

[0031] The pivot handle 7 has an engagement convex portion 71 extending along the axial direction X and pivotally penetrating into the handle engagement groove 511, two positioning convex portions 72 respectively extending radially r from both sides of the engagement convex portion 71, and an engagement through hole 73 penetrating through the engagement convex portion 71 along the axial direction X and aligning with the pivot groove 53. The positioning convex portions 72 are respectively displaceably inserted into the handle limit grooves 512 from both sides of the handle engagement groove 511. In this embodiment, the rear end of the positioning pin 6 penetrates into the engagement through hole 73, so that the pivot handle 7 is fixed to the positioning pin 6 and can drive the positioning pin 6 to rotate. When the pivot handle 7 rotates in the disassembly direction φ with the positioning pin 6 as the axis, the positioning convex portions 72 can respectively penetrate into the handle limit grooves 512 to limit the pivot handle 7 from axially displacing in the X direction, and abut against the groove walls of the handle limit grooves 512 to drive the handle 5 to rotate, so as to increase the torque of the locking tool 4 applied to the anti-loosening screw 1, making the locking tool 4 more labor-saving in use. In addition, the number of the positioning convex portions 72 corresponding to the number of the handle limit grooves 512 can also be one or more than three, not limited to a specific number.

[0032] The positioning pin 6 includes a rod body 61 extending along the axial direction X and pivotally penetrating into the pivot groove 53, and two convex columns 62 respectively extending radially r from both sides of the front end of the rod body 61. The convex columns 62 are exposed outside the locking ratchet structure 52. The rod body 61 has a support portion 611 connected to the convex columns 62 and pivotally penetrating into the pivot groove 53, and an engagement end portion 612 extending backward from the support portion 611 and connected to the pivot handle 7. In this embodiment, the engagement end portion 612 is separably inserted into the engagement through hole 73 from the pivot groove 53, so as to facilitate the assembly of the positioning pin 6, the handle 5 and the pivot handle 7. However, the assembly method of the locking tool 4 is not limited to the foregoing. The engagement end portion 612 can also be fixed to the pivot handle 7, and the handle 5 is provided as two separable components on both sides of the positioning pin 6, so that the assembly of the locking tool 4 can also be completed. The radial cross-sectional shapes of the support portion 611 and the engagement through hole 73 are different, so that the support portion 611 is blocked by the engagement convex portion 71 and cannot move backward after the engagement end portion 612 penetrates into the engagement through hole 73. In addition, the number of the convex columns 62 can be one, which is convenient for manufacturing; or more than three, making the design of the positioning pin 6 more complex and not easy to replicate.

[0033] Refer to Figure 1 、 Figure 2 、 Figure 4 and Figure 5, the anti-loosening screw 1 includes a screw body 2 and a snap structure 3. The screw body 2 includes a screw head 21 and a screw rod 22 that extends forward from the front side of the screw head 21 and can pass through the external structure 9. The front end of the screw rod 22 is threaded for locking to the external structure 9. The screw head 21 has an annular outer wall 211 and an anti-loosening ratchet structure 212 connected to the rear side of the outer wall 211. The outer wall 211 defines a screw head inner hole 213 with an opening surrounded by the anti-loosening ratchet structure 212. The anti-loosening ratchet structure 212 is adapted to engage with the locking ratchet structure 52, and the shape of the anti-loosening ratchet structure 212 corresponds to the shape of the locking ratchet structure 52 and is serrated, and has several force-receiving surfaces 215 that extend backward and are arranged at annular intervals, and several sliding surfaces 216 that are respectively located between two adjacent force-receiving surfaces 215. The inclination of the sliding surface 216 corresponds to the abutting surface 522. More specifically, each of the sliding surfaces 216 extends obliquely from the front edge of one of the two adjacent force-receiving surfaces 215 toward the disassembly direction φ to the rear edge of the other of the two adjacent force-receiving surfaces 215. In this embodiment, the force-receiving surface 215 faces a locking direction θ opposite to the disassembly direction φ, and the extending direction of the force-receiving surface 215 corresponds to the extending direction of the force-applying surface 521 along the axial direction of the rod body 61 (extending along the axial direction X), so that the force-receiving surface 215 can be used to block the force-applying surface 521, and when the locking tool 4 drives the anti-loosening screw 1 to rotate in the locking direction θ, it can prevent the locking ratchet structure 52 from slipping relative to the anti-loosening ratchet structure 212 in the locking direction θ, so as to achieve the purpose of driving the anti-loosening screw 1 to rotate in the locking direction θ by the locking tool 4.

[0034] The snap structure 3 is installed in the inner hole 213 of the screw head, and includes a base wall 31 and a surrounding wall 32 extending backward from the outer edge of the base wall 31. The base wall 31 and the surrounding wall 32 define an engagement groove 33 with an opening facing backward. The engagement groove 33 has a main groove portion 331 defined by the base wall 31 and the surrounding wall 32 for the rod body 61 to penetrate, and two positioning groove portions 332 respectively formed on both sides of the rear side surface of the surrounding wall 32 and communicating with the main groove portion 331. The surrounding wall 32 forms two limiting grooves 34 respectively communicating with the positioning groove portions 332 and extending along the disassembly direction φ. Each positioning groove portion 332 and the corresponding limiting groove 34 form an L-shaped groove on the surrounding wall 32 for each stud 62 to penetrate and slide. The limiting groove 34 is spaced from the rear side surface of the surrounding wall 32. The positioning groove portions 332 respectively allow the studs 62 to be displaceably inserted into the limiting grooves 34. When the studs 62 are located in the limiting grooves 34, the handle 5 can be restricted from displacing backward along the axial direction X relative to the anti-theft screw 1 and will not be misaligned relative to the screw body 2. In this embodiment, the snap structure 3 is rotatably installed in the inner hole 213 of the screw head, but can also be fixed in the inner hole 213 of the screw head and cannot rotate as required. The positioning groove portions 332 respectively allow the locking blocks 54 to penetrate, so as to restrict the snap structure 3 from rotating relative to the handle 5. In addition, the number of the positioning groove portions 332 and the number of the limiting grooves 34 corresponding to the number of the studs 62 can also be one or more than three, so that at least one stud 62 can be clamped in the limiting groove 34, and the design of the snap structure 3 can be customized according to the anti-theft requirements.

[0035] Refer to Figure 5 With Figure 6 , when it is necessary to screw the anti-theft screw 1 into the external structure 9, the screw rod 22 of the anti-theft screw 1 can be first aligned with the locking hole of the external structure 9, and then the locking tool 4 is inserted into the inner hole 213 of the screw head along the axial direction X, so that the anti-theft ratchet structure 212 is engaged with the locking ratchet structure 52, and the studs 62 of the positioning pin 6 are respectively inserted into the front ends of the positioning groove portions 332. At the same time, the locking blocks 54 of the handle 5 are respectively inserted into the rear ends of the positioning groove portions 332. Then, as Figure 5 shown, the pivot handle 7 is rotated in the locking direction θ with the rod body 61 as the axis, and drives the handle 5 to rotate in the same direction. At this time, the studs 62 and the locking blocks 54 both abut against the groove walls of the positioning groove portions 332, and the force application surfaces 521 respectively continuously abut against the force receiving surfaces 215, so as to drive the screw body 2 to rotate in the locking direction θ, so that the screw head 21 abuts against the external structure 9 and can lock the anti-theft screw 1. On the contrary, when it is necessary to remove the anti-theft screw 1 from the external structure 9, it can be as Figure 6As shown, first fix the locking tool 4 at the anti-tamper screw 1. At the same time, the clamping blocks 54 of the handle 5 respectively penetrate into the positioning groove portions 332. Then, rotate the pivot handle 7 around the rod body 61 as the axis in the disassembly direction φ, so as to drive the convex columns 62 to respectively penetrate into the limiting grooves 34. At this time, the positioning convex portions 72 also respectively penetrate into the handle limiting grooves 512. Next, continue to rotate the pivot handle 7 in the disassembly direction φ. After the positioning convex portions 72 move to the innermost end of the handle limiting grooves 512 and abut against the groove walls, the handle 5 can rotate in the disassembly direction φ together with the pivot handle 7. At the same time, since the convex columns 62 are located in the limiting grooves 34, the locking tool 4 cannot move backward relative to the anti-tamper screw 1 in the axial direction X. Therefore, the abutting surface 522 will continuously and tightly press against the sliding surface 216. In this way, when the locking tool 4 rotates in the disassembly direction φ, the abutting surface 522 will continuously apply force to the sliding surface 216, so as to drive the screw body 2 to rotate in the disassembly direction φ, and make the screw head 21 move away from the external structure 9, so as to remove the anti-tamper screw 1 from the external structure 9. In the above disassembly process, first the pivot handle 7 rotates, and then the pivot handle 7 drives the handle 5 to rotate together, so that the user can perform the disassembly operation in a simple and labor-saving manner.

[0036] To sum up, through the limiting grooves 34 for the convex columns 62 to respectively rotate and penetrate into the corresponding connection grooves 33 in the disassembly direction φ, the anti-tamper ratchet structure 212 cannot be misaligned relative to the locking ratchet structure 52, and can be driven by the pivot handle 7 to rotate in the disassembly direction φ. In this way, in the case of using a general tool (without a positioning pin), even if it can engage with the anti-tamper ratchet structure 212, the anti-tamper screw 1 still cannot be disassembled. That is to say, the anti-tamper screw 1 needs to be disassembled by the locking tool 4 with the positioning pin 6, so the purpose of good anti-theft effect can be achieved. In addition, the pivot handle 7 cooperates with the handle 5 to drive the screw body 2 to rotate in the locking direction θ or the disassembly direction φ around the rod body 61 as the axis. Therefore, the user can assemble or disassemble the anti-tamper screw 1 by simply holding the pivot handle 7 with one hand, achieving the effect of convenient use. Further, when the user disassembles the anti-tamper screw 1, the user can also only rotate the pivot handle 7 with one hand to drive the positioning pin 6 to rotate, so that the convex columns 62 respectively penetrate into the limiting grooves 34 and rotate synchronously with the handle 5, making the locking tool 4 easier to use and achieving the effect of convenient use. Therefore, the purpose of the present invention can be truly achieved.

[0037] The above are only the embodiments of the present invention, and the scope of implementation of the present invention cannot be limited thereby. That is, all simple equivalent changes and modifications made according to the claims and the content of the specification of the present invention still fall within the scope of the present invention.

Claims

1. An anti-disassembly screw, suitable for use with a locking tool to be disassembled and assembled on an external structure, the locking tool comprising a handle and a positioning screw pin, the handle comprising a gripping portion and a locking ratchet structure arranged at the front end of the gripping portion, the positioning screw pin comprising a rod body extending axially and pivotally penetrating the handle, and at least one protrusion extending radially from the front end of the rod body, the protrusion being exposed outside the locking ratchet structure, characterized in that: The anti-tamper screws include: A screw body, comprising a screw head and a screw rod extending forward from the front side of the screw head and being capable of being inserted into the external structure, the screw head having an anti-disassembly ratchet structure located at the rear side, and an inner hole of the screw head whose opening is surrounded by the anti-disassembly ratchet structure, the anti-disassembly ratchet structure being adapted to mesh with the locking ratchet structure; and The buckle structure is installed in the inner hole of the screw head and includes a base wall and a surrounding wall extending backward from the outer edge of the base wall. The base wall and the surrounding wall define a connection groove opening backward. The surrounding wall forms at least one limiting groove connected to the connection groove and extending along the disassembly direction. The limiting groove is spaced from the rear side of the surrounding wall. The connection groove is suitable for allowing the boss to be displaceably inserted into the limiting groove to limit the handle from axial displacement. Among them, when the anti-disassembly ratchet structure is engaged with the locking ratchet structure, the screw body can be driven by the handle to rotate in a locking direction opposite to the disassembly direction with the rod body as the axis; when the anti-disassembly ratchet structure is engaged with the locking ratchet structure, and the limiting groove is for the protrusion to penetrate, so that the anti-disassembly ratchet structure cannot be misaligned relative to the locking ratchet structure, the screw body can be driven by the handle to rotate in the disassembly direction with the rod body as the axis.

2. The anti-disassembly screw according to claim 1, characterized in that: The locking ratchet structure has several force-applying surfaces extending along the length direction of the gripping portion and arranged in an annular manner, and several abutting surfaces respectively located between two adjacent force-applying surfaces, and the abutting surfaces extend obliquely relative to the force-applying surfaces. The anti-disassembly ratchet structure has several force-bearing surfaces extending backward and arranged in an annular manner, and several sliding surfaces respectively located between two adjacent force-bearing surfaces, and the inclination of the sliding surfaces corresponds to the abutting surfaces. When the force-bearing surfaces of the screw body are continuously abutted by the force-applying surfaces of the handle, the screw body can be driven by the handle to rotate in the locking direction. When the sliding surfaces of the screw body are continuously abutted by the abutting surfaces of the handle, and the boss penetrates into the limiting groove, so that the handle cannot be displaced axially along the sliding surfaces, the screw body can be driven by the handle to rotate in the disassembly direction.

3. The anti-disassembly screw according to claim 1, wherein: The positioning screw pin includes two bosses extending radially from both sides of the front end of the rod body, and two limiting grooves connected to the connecting groove and extending along the disassembly direction are formed on both sides of the surrounding wall. The connecting groove has a main groove portion defined by the base wall and the surrounding wall and suitable for the rod body to pass through, and two positioning groove portions formed on the rear side of the surrounding wall and connected to the main groove portion. The positioning groove portions are respectively connected to the limiting grooves and allow the bosses to be displaceably inserted into the limiting grooves to limit the handle from axial displacement.

4. A locking tool is suitable for disassembling and assembling anti-tamper screws on an external structure. The anti-tamper screw includes a screw body and a snap structure. The screw body includes a screw head and a screw rod that extends forward from the front side of the screw head and can penetrate the external structure. The screw head has an anti-tamper ratchet structure located at the rear side, and a screw head inner hole whose opening is surrounded by the anti-tamper ratchet structure. The snap structure is installed in the screw head inner hole and includes a base wall and a surrounding wall that extends backward from the outer edge of the base wall. The base wall and the surrounding wall define an engagement groove with an opening facing backward. The surrounding wall forms at least one limiting groove that communicates with the engagement groove and extends along the disassembly direction. The limiting groove is spaced from the rear side surface of the surrounding wall. It is characterized in that, The locking tool comprises: A handle, comprising a grip portion, a pivot slot extending through the grip portion from front to back, and a locking ratchet structure disposed at the front end of the grip portion and surrounding an opening of the pivot slot, wherein the locking ratchet structure is adapted to engage with the anti-disassembly ratchet structure; and The positioning detent pin includes a rod body that axially extends and is pivotally inserted into the pivot groove, and at least one lug that radially extends from the front end of the rod body. The lug is exposed outside the locking ratchet structure and is displaceably inserted into the connection groove to the limiting groove to restrict the handle from axially displacing. Wherein, when the locking ratchet structure engages with the anti-disassembly ratchet structure, the handle can drive the screw body to rotate in the locking direction opposite to the disassembly direction with the rod body as the axis. When the locking ratchet structure engages with the anti-disassembly ratchet structure and the lug is inserted into the limiting groove, so that the locking ratchet structure cannot be misaligned relative to the anti-disassembly ratchet structure, the handle can drive the screw body to rotate in the disassembly direction with the rod body as the axis.

5. The latching tool according to claim 4, wherein: The snap structure is pivotally installed in the inner hole of the screw head. The connection groove has at least one positioning groove portion that extends forward from the rear side of the surrounding wall. The handle further includes at least one block that protrudes forward from the front end of the holding portion. The block is adapted to be inserted into the positioning groove portion to restrict the snap structure from pivoting.

6. The latching tool according to claim 4, wherein: The locking tool further includes a pivot handle that is pivotally installed at the rear end of the holding portion. The pivot handle is connected to the end of the rod body away from the lug. When the pivot handle rotates with the rod body as the axis, it can drive the lug to move in the limiting groove.

7. The latching tool according to claim 6, wherein: The pivot handle has an axially extending connecting convex portion and at least one radially extending positioning convex portion. An axially extending handle connection groove is formed on the side of the holding portion away from the locking ratchet structure, and at least one handle limiting groove that communicates with the handle connection groove and extends along the disassembly direction. The handle connection groove allows the positioning convex portion to be inserted into the handle limiting groove, so that when the pivot handle rotates in the disassembly direction, it can abut against the groove wall of the handle limiting groove to drive the handle to rotate.

8. A screw-locking tool set, characterized in that, Comprising: The anti-disassembly screw according to claim 1; and The locking tool according to claim 4, used in cooperation with the anti-disassembly screw.

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