Fixing device for heterogeneous cap

Abstract

This invention relates to a fixing device for a cap with a heterogeneous material. The fixing device consists of a shaft for assembling a fixing component within a space housed inside a sleeve, and an elastic body is sleeved on the outside of the shaft. The shaft has a rod head and a positioning part on each side, which protrude from the outside of the sleeve. A bushing is formed on the outside of the rod head, and a first body and a second body of the cap are formed on the outside of the bushing. The first body and the second body can be designed with different colors, materials, or shapes, etc., to enhance the identification effect of the fixing device by utilizing the heterogeneity of the cap, thereby facilitating the identification of the application characteristics of the fixing device.

Description

Technical Field

[0001] This invention provides a fastening device with heterogeneous caps, particularly a fastening device that uses the different properties of the caps to identify its characteristics. The device consists of a shaft for assembling a fastening component within the accommodating space of a sleeve, with a bushing formed on the outside of the shaft head protruding. A first body and a second body of the cap are then formed on the outside of the bushing. The different properties of the first and second bodies allow for easy identification of the application characteristics of the fastening device. Prior Technology

[0002] Generally, when assembling and joining sheet metal (plate-to-plate), a locking screw with a knob, collar, and screws is used. The screws and collar are first fixed to the outer panel. The knob is then turned to engage the screws in the inner panel, creating a pre-positioned connection. A hand tool is then used to tighten the screws, locking the outer and inner panels together. This multi-layered sheet metal joining method is applicable to machine tools or other plate-to-plate connections. However, in machine tools, the points where sheet metal is used for joining are mostly at power units or speed adjustment devices. These power units and speed adjustment devices are located within the space formed by the machine housing, allowing for the use of movable sheet metal for assembly, joining, and disassembly. When the power unit malfunctions, breaks down, or is damaged, or when the speed adjustment device needs to change or adjust the speed, the sheet metal must be removed. When performing related maintenance and adjustment work, the sheet metal is secured by multiple positioning screws. Therefore, during disassembly, the positioning screws are easily lost or come loose, making it impossible to re-secure the sheet metal to its original position. This affects the inconvenience and trouble of assembly and disassembly. In order to solve the problem of easy loss of the locking screws, some companies have developed a fixing device consisting of a cap, a screw, and a positioning seat. The positioning seat of the fixing device is first fastened into the through hole of the sheet metal, and then the screw is used to lock it onto another sheet metal to form a fixation. When the user removes the sheet metal, the fixing device can still be fixed in the through hole of the sheet metal through the positioning seat, so that the fixing device will not fall off or be lost. However, during the assembly process, the user still has to apply force or use hand tools (such as screwdrivers or wrenches) to operate the fixing device to lock or remove it. In practical application, there are still many shortcomings and troubles.

[0003] However, screws and fasteners used in sheet metal assembly typically retain the shape and original color of the metal material, or a single color of the externally molded insulating material. But sheet metal used in electronic devices is usually assembled inside enclosed chassis, cabinets, or server units, creating a dimly lit and often dark environment. This makes it difficult to identify the correct positions of screws and fasteners used on the sheet metal or between sheets. Even with the aid of flashlights or other lighting, the location is often obstructed or blocked by other components or equipment, making it difficult to quickly locate the screws or fasteners. This also hinders related maintenance, testing, or component replacement work and needs improvement.

[0004] Therefore, how to solve the problems and troubles of conventional screws and fixing devices being limited by insufficient brightness in the environment and space during application and operation, affecting identification and operation, and the inconvenience and shortcomings of screws or fixing devices being unable to identify their characteristics and application performance by their shape, is the direction that relevant manufacturers in this industry are eager to research and improve. Summary of the Invention

[0005] Therefore, in view of the above-mentioned problems and deficiencies, the inventor collected relevant information, conducted multiple evaluations and considerations, and, based on years of experience accumulated in this industry, through continuous creation, research and improvement, finally designed this invention patent for a fixing device with heterogeneous caps.

[0006] The main objective of this invention is to provide a fixing device with a heterogeneous cap. The device comprises a shaft for assembling a fixing component within a space housed inside a sleeve, and an elastic body is fitted over the shaft. The shaft has a rod head and a positioning portion protruding from the sleeve on both sides. A bushing is formed outside the rod head, and a first body and a second body of the cap are formed outside the bushing. The first and second bodies can be designed with different colors, materials, or shapes to enhance the identification of the fixing device through the heterogeneity of the cap. This facilitates the identification of the fixing device's application characteristics, thereby simplifying the location of the fixing device and enabling related maintenance, inspection, or component replacement.

[0007] Another objective of this invention is that the sleeve has a through hole with a reduced diameter on one side of the accommodating space to allow the positioning part on one side of the positioning member to move in and out. A connecting part is provided on one side of the sleeve outside the through hole, which can be assembled onto a preset first plate. A stop body is provided on the other side of the sleeve opposite the connecting part. An operating part is provided on the surface of the rod head on one side of the fixing member assembled onto the sleeve. The operating part can be a concave slotted hole, cross hole, quadrilateral hole, hexagonal hole, polygonal hole, star hole, or geometric hole, etc., or the operating part can be a quadrilateral rod, hexagonal rod, polygonal rod, or geometric rod, etc. The positioning part on the other side of the fixing member is a screw or pin, etc., which can be assembled onto a preset second plate using the positioning part. A bushing is formed on the outside of the rod head of the fixing member by in-mold injection molding. The bushing can be made of insulating materials such as plastic, rubber, or silicone.

[0008] Another object of the present invention is that the fixing member can assemble a bushing and a cap at the rod head of the shaft. The cap includes a first body and a second body, and the first body and the second body can be integrally formed into a cap and assembled on the outside of the bushing. The shaft passes through the fitting hole of the bushing so that the fitting part of the rod head is fixed to the fitting hole of the bushing. The obliquely conical limiting ring surface on the outer side of the fitting part is locked into the abutment ring groove of the first body, which allows the first body and the second body of the bushing and the cap to be fitted together. The main body is assembled at the head of the shaft, and the bushing and cap can be assembled and connected to the shaft of the fastener. The first body can be an insulating material containing fluorescent material, and the second body is an insulating material with light-transmitting or semi-light-transmitting properties. The first body can be an insulating material such as plastic, silicone, rubber or acrylic containing fluorescent powder or fluorescent agent; the second body can be made of silicone, acrylic, plastic or rubber or other materials with light-transmitting or semi-light-transmitting properties.

[0009] Another objective of this invention is that the fastener can assemble a bushing and a cap at the head of the shaft. The cap includes a first body and a second body, and the cap, which is integrally formed by processing the first body and the second body, can be assembled on the outside of the bushing. The shaft passes through the fitting hole of the bushing so that the fitting part of the shaft head can be fixed to the fitting hole of the bushing. The oblique conical limiting ring surface on the outer side of the fitting part is locked in the abutment ring groove of the first body, so that the first body and the second body of the bushing and the cap can be assembled at the head of the shaft. Thus, the bushing and the cap can be assembled and combined at the shaft of the fastener. The first body and the second body are respectively made of insulating materials of different colors, and at least one viewing hole is provided on the top of the second body to view the color of the first body. The at least one viewing hole can be arrow-shaped, round, elliptical, rectangular, polygonal or geometric shape, etc.

[0010] Another objective of this invention is that the fixing component can assemble a bushing and a cap at the head of the shaft. The cap includes a first body and a second body, and the cap, which is integrally formed by processing the first body and the second body, can be assembled on the outside of the bushing. The shaft passes through the fitting hole of the bushing so that the fitting part of the shaft head can be fixed to the fitting hole of the bushing. The oblique conical limiting ring surface on the outside of the fitting part is locked in the abutment ring groove of the first body, so that the first body and the second body of the bushing and the cap can be assembled at the head of the shaft. Thus, the bushing and the cap can be assembled and combined at the shaft of the fixing component. The first body is made of a rigid insulating material such as plastic, rubber, acrylic or silicone, and has a plurality of grooves on the outside of the first body. The second body can be made of a plurality of strip-shaped rods made of a soft insulating material such as silicone, acrylic, plastic or rubber, and the plurality of strip-shaped rods can be respectively formed in the plurality of grooves. Simple Explanation of the Diagram

[0011] [Figure 1] is a perspective view of the first embodiment of the present invention. [Figure 2] is an exploded perspective view of the first embodiment of the present invention. [Figure 3] is an exploded perspective view of the first embodiment of the present invention. [Figure 4] is a side cross-sectional view of the first embodiment of the present invention before assembly. [Figure 5] is a side cross-sectional view of the first embodiment of the present invention after assembly. [Figure 6] is a perspective view of the second embodiment of the present invention. [Figure 7] is an exploded perspective view of the second embodiment of the present invention. [Figure 8] is an exploded perspective view of the second embodiment of the present invention. [Figure 9] is a side cross-sectional view of the second embodiment of the present invention. [Figure 10] is a perspective view of the third embodiment of the present invention. [Figure 11] is an exploded perspective view of the third embodiment of the present invention. [Figure 12] is an exploded perspective view of the third embodiment of the present invention. [Figure 13] is a side cross-sectional view of the third embodiment of the present invention. Implementation

[0012] Please refer to Figures 1-13. The fixing device for the heterogeneous cap cover of the present invention includes a sleeve 1, a fixing member 2 assembled to the sleeve 1, and a cap cover 3, wherein:

[0013] The sleeve 1 has an internal accommodating space 10 for assembling the shaft 21 on one side of the fixing component 2, and an elastic body 22 is sleeved on the outside of the shaft 21. The shaft 21 has a rod head 211 and a positioning part 212 on both sides, which are exposed outside the accommodating space 10 on both sides of the sleeve 1. A bushing 23 is then assembled on the outside of the rod head 211.

[0014] The cap 3 is assembled on the outside of the bushing 23 of the fastener 2. It includes a first body 31 and a second body 32. The first body 31 has an assembly space 310 inside. An inclined support ring groove 3101 is provided on one side of the assembly space 310, and a plurality of protruding ribs 311 are provided on the inner wall of the assembly space 310.

[0015] The sleeve 1 of the present invention has a through hole 101 with a reduced diameter on one side of the internal accommodating space 10 to allow the positioning part 212 on one side of the shaft 21 of the fixing member 2 to move in and out. That is, an inner shoulder 102 is formed at the position adjacent to the accommodating space 10 and the through hole 101. A connecting part 11 is provided on one side of the sleeve 1 outside the through hole 101, which can be assembled to the preset first plate 4. A stop body 12 is provided on the other side of the sleeve 1 opposite to the connecting part 11. The rod head 211 on one side of the fixing member 2 assembled to the sleeve 1 has an operating part 213 on its surface. The operating part 213 can be a concave straight hole, a cross hole, a quadrilateral hole, a hexagonal hole, a polygonal hole, or a star-shaped hole. The operating part 213 can be a quadrilateral rod, hexagonal rod, polygonal rod, or geometric rod, etc., and the positioning part 212 on the other side of the fixing part 2 is a screw or pin, etc., which can be assembled to the preset second plate 5 using the positioning part 212. The bushing 23 is assembled on the outside of the rod head 211 of the fixing part 2, and the bushing 23 has an internal movable space 230. On one side of the movable space 230, there is an inwardly folded abutting edge 231. The opposite abutting edge 231 is a fitting hole 2301 with a reduced diameter on the other side of the movable space 230. A plurality of locking grooves 232 are provided on the outside of the bushing 23 adjacent to the fitting hole 2301.

[0016] Furthermore, in the first embodiment of the present invention, the aforementioned fastener 2 can be assembled with a bushing 23 and a cap 3 at the rod head 211 of the shaft 21. The cap 3 includes a first body 31 and a second body 32, and the first body 31 and the second body 32 can be integrally formed by processing (which can be in-mold injection processing). The cap 3, which is assembled on the outside of the bushing 23 using methods such as molding, interference fit, tight fit, hot melt bonding, adhesive bonding, or low-frequency processing, allows the multiple protruding ribs 311 on the inner wall of the assembly space 310 of the first body 31 to be respectively aligned and held in the locking grooves 232 on the outside of the bushing 23, forming an axial limit to prevent axial rotation or movement. Then, the shaft 21 passes through the fitting hole 2301 of the bushing 23, so that the fitting part 2111 of the shaft head 211 is fixed to the fitting hole 2301 of the bushing 23, forming a snap-fit ​​tight fit assembly that is not easy to fall off or separate. The oblique conical limiting ring surface 2112 on the outer side of the fitting part 2111 is a retaining ring groove 3 that is locked in the first body 31. At position 101, the first body 31 and the second body 32 of the bushing 23 and the cap 3 can be assembled at the rod head 211 of the shaft 21. The shaft 21 forms a radial limit on the bushing 23 and the cap 3 to prevent radial displacement and sliding. The bushing 23 and the cap 3 can be assembled and connected to the shaft 21 of the fixing member 2. The first body 31 can be an insulating material containing fluorescent material, and the second body 32 can be an insulating material with light-transmitting or semi-light-transmitting properties. The first body 31 is an insulating material such as plastic, silicone, rubber or acrylic containing fluorescent powder or fluorescent agent; the second body 32 is made of silicone, acrylic, plastic or rubber or other materials with light-transmitting or semi-light-transmitting properties.

[0017] Furthermore, in the second embodiment of the present invention, the aforementioned fastener 2 can be assembled with a bushing 23 and a cap 3 at the rod head 211 of the shaft 21. The cap 3 includes a first body 31 and a second body 32, and the cap 3, which is integrally formed by processing the first body 31 and the second body 32, can be assembled onto the outside of the bushing 23, so that the plurality of protruding ribs 311 on the inner wall of the assembly space 310 of the first body 31 are respectively aligned and held onto the outside of the bushing 23. At each locking groove 232, axial limiting is formed to prevent axial rotation and movement. Then, the shaft 21 passes through the fitting hole 2301 of the bushing 23 so that the fitting part 2111 of the rod head 211 is fixed to the fitting hole 2301 of the bushing 23. The obliquely conical limiting ring surface 2112 on the outer side of the fitting part 2111 is locked into the abutment ring groove 3101 of the first body 31, so that the bushing 23, the first body 31 of the cap 3 and the second body 32 can be assembled on the shaft. At the rod head 211 of rod 21, the bushing 23 and cap 3 are radially limited by the shaft 21 to prevent radial displacement and sliding. The bushing 23 and cap 3 can be assembled and connected to the shaft 21 of the fixing member 2. The first body 31 and the second body 32 are respectively made of insulating materials of different colors (e.g., red and white, black and white, or red and black, etc., at least two different colors). The top of the second body 32 is provided with at least one viewing hole 320 to view the color of the first body 31. The at least one viewing hole 320 can be arrow-shaped, round, elliptical, rectangular, polygonal, or geometric. By viewing the color of the first body 31 through the at least one viewing hole 320 on the second body 32, the marking direction, indicating position, or operating status (locking or unlocking, etc.) of the at least one viewing hole 320 on the second body 32 can be clearly identified.

[0018] Furthermore, in the third embodiment of the present invention, the aforementioned fastener 2 can be assembled with a bushing 23 and a cap 3 at the rod head 211 of the shaft 21. The cap 3 includes a first body 31 and a second body 32, and the cap 3, which is integrally formed by processing the first body 31 and the second body 32, can be assembled on the outside of the bushing 23. This allows the multiple protruding ribs 311 on the inner wall of the assembly space 310 of the first body 31 to be respectively aligned and held in the locking grooves 232 on the outside of the bushing 23, forming an axial limit to prevent axial rotation or movement. Then, the shaft 21 passes through the fitting hole 2301 of the bushing 23, so that the fitting part 2111 of the rod head 211 is fixed to the fitting hole 2301 of the bushing 23. The oblique conical limiting ring surface 2112 on the outer side of the fitting part 2111 is locked in the abutment ring groove 3101 of the first body 31, which allows the bushing 23 and the cap 3 to be fitted together. The first body 31 and the second body 32 are assembled at the rod head 211 of the shaft 21. The shaft 21 forms a radial limit on the bushing 23 and the cap 3, preventing radial displacement and sliding. The bushing 23 and the cap 3 can be assembled and connected to the shaft 21 of the fixing member 2. The first body 31 can be made of a rigid insulating material such as plastic, rubber, acrylic or silicone, and has a plurality of grooves 312 on the outside of the first body 31. The second body 32 can be made of a plurality of strip-shaped rods 321 made of a soft insulating material such as silicone, acrylic, plastic or rubber, and the plurality of strip-shaped rods 321 can be formed in the plurality of grooves 312. The plurality of strip-shaped rods 321 of the soft material of the second body 32 are arranged around the outside of the first body 31 to form a good grip feel, which can be directly gripped to control the fixing member 2 to perform rotation, displacement and other operations.

[0019] Therefore, the fixing device for the heterogeneous cap of the present invention, in practical application and implementation, can be fixed to the connecting hole 40 of the preset first plate 4 by means of the joint 11 on one side of the sleeve 1. The fixing member 2 assembled in the accommodating space 10 of the sleeve 1 has a bushing 23 formed on the outside of the rod head 211 of the shaft 21, which has an movable space 230 covering the outside of the sleeve 1. At the bottom of the movable space 230, there is an inwardly curved and contracting abutment edge 231 that can abut against. The bushing 23 limits the movement of the fixing member 2 within the accommodating space 10 of the sleeve 1 at the stop 12 on one side of the sleeve 1. The elastic body 22 of the fixing member 2, which is sleeved at the shaft 21, abuts against the inner wall of the movable space 230 of the bushing 23 on one side, and abuts against the inner shoulder 102 of the accommodating space 10 on the other side, so that the elastic body 22 can push the fixing member 2 and the bushing 23 to move within the sleeve 1. The positioning part 212 on one side of the fixing member 2 is located within the sleeve 1. The cylinder 1 can move and extend at the through hole 101 on one side of the accommodating space 10. It can also be aligned and assembled with the pre-set second plate 5 located adjacent to the pre-set first plate 4 using the positioning part 212 at the mating hole 50 of the pre-set second plate 5. The positioning part 212 and the mating hole 50 can be a combination of screw, screw hole, or insert rod, pin hole, etc. When it is necessary to operate the fixing part 2, in addition to directly grasping the cap 3 to directly control the operation of the fixing part 2, it can also be operated by the rod head of the shaft 21. The operating part 213 at the top of 211 (which can be a concave slotted hole, cross hole, quadrilateral hole, hexagonal hole, polygonal hole, star hole, or geometric hole, or a quadrilateral rod, hexagonal rod, polygonal rod, or geometric rod, etc.) is equipped with a corresponding hand tool (which can be a slotted screwdriver, cross screwdriver, hex wrench, open-end wrench, box wrench, socket wrench, or ratchet wrench, etc.) to operate the fixing part 2, making the operation of the fixing part 2 more convenient and practical.

[0020] Furthermore, the cap 3 of the present invention can be integrally formed into a semi-finished product by processing the first body 31 and the second body 32. After being assembled on the outside of the bushing 23, the bushing 23 and the cap 3 can be applied to the screw head (not shown in the figure), pull rod head or pin head of other fixing devices (not shown in the figure) to form a fixing device with obvious identification effect. After the first body 31 and the second body 32 are integrally formed, they can be assembled on the outside of the bushing 23 by processing methods such as in-mold injection molding, interference fit, tight fit, hot melt bonding, adhesive bonding or low frequency processing.

[0021] Furthermore, in the first embodiment of the present invention described above, the sleeve 1 and the fastener 2 are respectively used for assembling the preset first plate 4 and the preset second plate 5. When the preset first plate 4 and the preset second plate 5 are assembled in a darker location (e.g., inside a chassis, cabinet, or server body), the cap 3 formed on the outer bushing 23 of the shaft 21 of the fastener 2 can transmit light through the light-transmitting nature of the second body 32, allowing the fluorescent material inside the first body 31 to absorb external light energy (such as when projecting light with a flashlight or disassembling the assembled mechanism). When the fastener 2 is not irradiated by external light energy, the light energy absorbed by the fluorescent material inside the first body 31 can be released and transmitted through the second body 32, making the location of the fastener 2 clearly identifiable from the external periphery. This allows for easy operation of the fastener 2 to disassemble or assemble the preset first plate 4 and the preset second plate 5, and also facilitates maintenance, inspection, or replacement of components. This achieves the purpose of convenient operation of the fastener 2, effectively improving work efficiency and facilitating on-site operations.

[0022] In the second embodiment of the present invention described above, the sleeve 1 and the fixing member 2 of the present invention can be assembled with a preset first plate 4 and a preset second plate 5. The bushing 23 formed on the outside of the shaft 21 of the fixing member 2 and the cap 3 formed on the outside of the bushing 23 can be clearly viewed through at least one viewing hole 320 on the second body 32 by the difference in color between the first body 31 and the second body 32 (which can be red and white, black and white, or red and black, etc., at least two different colors). This makes it easier to understand the meaning (such as locking, unlocking, or indicating direction or marking position) presented on at least one viewing hole 320 (which can be arrow-shaped, lock-shaped, number or indicator mark, etc.). Because of the color difference presented at the viewing hole 320, it is easier to see the function that the viewing hole 320 is intended to express when viewing, so as to facilitate the operation of the fixing member 2 and not be easily affected by the surrounding environment of the fixing member 2.

[0023] Furthermore, in the third embodiment of the present invention described above, the sleeve 1 and the fixing member 2 of the present invention can be assembled with the preset first plate 4 and the preset second plate 5. The bushing 23 formed on the outside of the rod head 211 of the shaft 21 of the fixing member 2 is then processed and formed with the cap 3 on the outside of the bushing 23. The multiple strip-shaped rods 321 of the second body 32 are formed in the multiple grooves 312 on the outside of the first body 31. Since the multiple rods 321 are made of soft material and protrude from the outside of the first body 31, it is more convenient to touch and grasp the multiple rods 321 of the cap 3 when operating the fixing member 2. It has the advantages of good tactile feel, non-slip and not easy to loosen, easier to apply force, and less friction with the user's fingers, so as to facilitate the operation of the fixing member 2 and make the assembly or disassembly of the preset first plate 4 and the preset second plate 5 more convenient, time-saving and labor-saving.

[0024] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of the patent. Therefore, any simple modifications and equivalent structural changes made using the description and drawings of the present invention should also be included within the scope of the patent of the present invention and are hereby stated.

[0025] In conclusion, the aforementioned fixing device with heterogeneous cap of the present invention can reliably achieve its function and purpose in practical application. Therefore, the present invention is indeed a highly practical research and development. In order to meet the application requirements for an invention patent, this application is hereby filed in accordance with the law. We hope that the Examination Board will grant this application as soon as possible to protect the inventor's hard work in research and development. If the Examination Board has any questions, please do not hesitate to write to us for guidance. The inventor will do his best to cooperate. We would be very grateful for your help.

[0026] 1: Sleeve 10: Storage space 101: Through hole 102: Inner shoulder area 11: Joint 12: Stop body 2: Fasteners 21: Shaft 211: Clubhead 2111: Fitting part [ ] 2112: Limiting ring surface 212: Positioning Department 213: Operations Department 22: Elastomer 23: Bushing 230: Activity Space 2301: Fitting hole [ ] 231: Supporting the Edge Section 232: Card slot 3: Hat Cover 31:First body 310: Assembly Space [ ] 3101: Supporting ring groove 311:convex rib body 312: Groove 32: Second Body 320: Viewing Hole 321: Rod 4: First board material 40: Connecting hole 5: Second board material

Claims

1. A fastening device for a cap with a heterogeneous material, comprising a sleeve, a fastener assembled to the sleeve, and a cap, wherein: The sleeve has an internal space for assembling a shaft on one side of the fixing member, and an elastic body is sleeved on the outside of the shaft. The shaft has a rod head and a positioning part protruding from the outside of the sleeve on both sides, and a bushing is assembled on the outside of the rod head. The cap is assembled on the outside of the bushing of the fixing member and includes a first body and a second body, so that the first body and the second body are assembled on the outside of the bushing. The first body is made of insulating material containing fluorescent material, and the second body is made of insulating material with light-transmitting or semi-light-transmitting properties.

2. The fixing device with a heterogeneous cap as described in claim 1, wherein the sleeve has a through hole with a reduced diameter on one side of the accommodating space for the positioning part on one side of the shaft to move in and out, and a joint on one side of the sleeve outside the through hole, and a stop body protruding on the other side of the sleeve opposite to the joint, and the shaft has an insert and a tapered limiting ring surface at the rod head, the bushing has an assembly space for the shaft to pass through, a fitting hole for the insert to be locked and fixed on one side of the assembly space, and a plurality of locking grooves on the outside of the bushing, and an assembly space for assembling the bushing inside the first body of the cap, a plurality of protruding ribs respectively locked in each locking groove on the inner wall of the assembly space, and a retaining ring groove for the limiting ring surface of the rod head to hold and limit the position on one side of the assembly space.

3. The fixing device with a heterogeneous cap as described in claim 1, wherein the rod head surface on one side of the fixing member is provided with an operating part, which is a concave hole, cross hole, quadrilateral hole, hexagonal hole, polygonal hole, star hole or geometric shape hole, or the operating part is a quadrilateral rod, hexagonal rod, polygonal rod or geometric shape rod; and the positioning part on the other side of the fixing member is a screw or a pin.

4. The fastening device with a heterogeneous cap as described in claim 1, wherein the fastener is formed by in-mold injection molding of the bushing outside the rod head, and the bushing is made of an insulating material such as plastic, rubber or silicone.

5. The fastening device with a heterogeneous cap as described in claim 1, wherein the fastener assembles the bushing and the cap at the rod head, and the first body and the second body of the cap are machined and assembled outside the bushing.

6. The fixing device with a heterogeneous cap as described in claim 5, wherein the first system comprises an insulating material of plastic, silicone, rubber or acrylic containing fluorescent powder or fluorescent agent; and the second system is a transparent or semi-transparent silicone, acrylic, plastic or rubber material.

7. The fixing device with a heterogeneous cap as described in claim 1, wherein the fixing member assembles the bushing and the cap at the rod head, and the first body and the second body of the cap are processed and assembled outside the bushing, wherein the first body and the second body are respectively made of insulating materials of different colors, and at least one or more viewing holes are provided on the top of the second body for viewing the color of the first body, wherein the at least one or more viewing holes are in the shape of an arrow, a circle, an ellipse, a rectangle, a polygon or a geometric shape.

8. The fixing device with a heterogeneous cap as described in claim 1, wherein the fixing member assembles the bushing and the cap at the rod head, and the first body and the second body of the cap are processed and assembled outside the bushing, wherein the first body is made of a rigid insulating material of plastic, rubber, acrylic or silicone and has a plurality of grooves on the outside of the first body, and the second body is made of a soft silicone, acrylic, plastic or rubber insulating material and has a plurality of strip-shaped rods positioned at the plurality of grooves.

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