Self-tapping screw with protection effect

Abstract

This utility model discloses a self-tapping screw with protective effect, including a screw body, a protective sleeve, and a compression ring. The screw body is vertically arranged and includes a head, a smooth column, and a threaded column arranged from top to bottom. The protective sleeve is vertically fitted onto the compression ring. The side of the protective sleeve is also provided with a viewing port for easy viewing of the bottom of the screw body. The inner side of the protective sleeve is provided with an anti-rotation groove that fits the compression ring. The outer periphery of the compression ring slides in conjunction with the anti-rotation groove. The compression ring and the protective sleeve are circumferentially fixed. The upper and lower ends of the anti-rotation groove are respectively provided with an upper limit surface and a lower limit surface. This utility model proposes a self-tapping screw that can prevent users from being punctured and is not easy to install incorrectly.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and in particular to a self-tapping screw with protective effect. Background Technology

[0002] Self-tapping screws are commonly used threaded parts with sharp heads, making them easy to screw into the substrate. When using them, the user holds the screw with their fingers, presses it against the substrate, and uses a screwdriver to drive it into the substrate. Because the tip of the self-tapping screw is sharp, users can easily be injured by it when handling it. To address this, some existing self-tapping screws have protective caps on their heads. However, these caps obscure the tip of the screw, meaning that when the user presses the screw against the substrate, the tip cannot be seen, leading to a misalignment between the pressed position and the actual installation location, potentially resulting in the screw being installed crookedly. Utility Model Content

[0003] In order to solve the problems of existing self-tapping screws that are prone to injuring users and being easily installed crookedly, this utility model proposes a self-tapping screw that can prevent users from being injured and is not easy to install crookedly.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A self-tapping screw with protective effect includes a screw body, a protective sleeve, and a compression ring. The screw body is vertically arranged and includes a head, a smooth column portion, and a threaded column portion arranged from top to bottom. The protective sleeve is vertically fitted onto the compression ring. The side of the protective sleeve is also provided with a viewing port for easy viewing of the bottom of the screw body. The inner side of the protective sleeve is provided with an anti-rotation groove adapted to the compression ring. The outer circumference of the compression ring slides with the anti-rotation groove. The compression ring and the protective sleeve are circumferentially fixed. The upper and lower ends of the anti-rotation groove are respectively provided with an upper limit surface and a lower limit surface. The self-tapping screw has a ready-to-install state and a locked state. In the ready-to-install state, the compression ring is threadedly connected to the lower end of the threaded column portion and abuts against the upper limit surface. The lower end of the protective sleeve is not higher than the bottom of the screw body. In the locked state, the head of the screw body presses the compression ring against the lower limit surface, and the compression ring is fitted onto the smooth column portion and disengaged from the threaded column portion.

[0005] Preferably, the self-tapping screw further includes a cap. In the locked state, the upper end of the protective sleeve is higher than the upper side of the head of the screw body, and the cap is embedded in the upper end of the protective sleeve and abuts against the upper side of the head.

[0006] Preferably, the anti-rotation groove has a regular hexagonal cross-section, and the compression ring is basically hexagonal nut-shaped.

[0007] Preferably, the self-tapping screw further includes a rubber pad, which is disposed along the inner circumference of the upper end of the anti-rotation groove. In the installation state, the compression ring compresses the rubber pad.

[0008] Preferably, there are two viewing openings, located on the left and right sides of the protective cover, with the lower side of the viewing opening extending to its lower end.

[0009] Preferably, the lower side of the rubber pad is flush with the upper side of the viewing port, and the lower periphery of the rubber pad is chamfered. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a self-tapping screw as an example.

[0011] Figure 2 This is a schematic diagram of the self-tapping screw in the installation state as shown in the embodiment.

[0012] Figure 3 for Figure 2 AA sectional view.

[0013] Figure 4 This is a schematic diagram of the self-tapping screw installation process in an embodiment.

[0014] Figure 5 This is a schematic diagram of the locking state of the self-tapping screw in an embodiment. Detailed Implementation

[0015] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0016] like Figures 1 to 5 This application mainly adopts a self-tapping screw design with a transparent opening 6, a protective sleeve 4, and a compression ring 5, which achieves the effect of preventing punctures and making it difficult to install crookedly. The following is a further detailed description of this application.

[0017] Example 1 The self-tapping screw with protective effect provided in this application embodiment includes a screw body 3, a protective sleeve 4, and a compression ring 5. The protective sleeve 4 is vertically fitted onto the compression ring 5. The protective sleeve 4 has a viewing opening 6 on its side and an anti-rotation groove 7 on its inner side. The outer periphery of the compression ring 5 slides and is circumferentially fixed to the anti-rotation groove 7. The anti-rotation groove 7 has an upper limit surface 8 and a lower limit surface 9 at its upper and lower ends. The self-tapping screw has a ready-to-install state and a locked state. This structure prevents the user from being punctured and allows the user to accurately see the bottom of the screw body 3, avoiding misalignment. This is because the viewing opening 6 facilitates user observation, and the position of the protective sleeve 4 in different states and its cooperation with the compression ring 5 ensures protection and installation accuracy.

[0018] Specifically, the screw body 3 is vertically arranged and includes, from top to bottom, a head 31, a smooth post 32, and a threaded post 33. The head 31 is typically a larger structure to facilitate the application of rotational force by the screwdriver. Its shape can be common slotted, Phillips head, or hex socket screws to accommodate different screwdrivers. The smooth post 32 has a smooth surface and no threads, mainly serving as a transition and support. The threaded post 33 has threads for screwing into the base 13 to achieve the connection function.

[0019] The protective sleeve 4 is vertically fitted onto the compression ring 5. A viewing opening 6 is provided on the side of the protective sleeve 4 for easy observation of the bottom of the screw body 3. The viewing opening 6 allows the user to clearly see the bottom of the screw body 3 during operation, enabling accurate placement of the screw body 3 against the base at the desired installation position. The viewing opening 6 can be made of transparent plastic or be an opening directly formed in the protective sleeve 4. The inner side of the protective sleeve 4 has an anti-rotation groove 7 that fits the compression ring 5. The function of the anti-rotation groove 7 is to restrict the rotation of the compression ring 5, allowing it to slide up and down only within the groove. The shape of the anti-rotation groove 7 can be designed according to the shape of the compression ring 5, such as a regular hexagon.

[0020] The outer circumference of the compression ring 5 slides in conjunction with the anti-rotation groove 7, and the compression ring 5 and the protective sleeve 4 are circumferentially fixed. The compression ring 5 is basically hexagonal in shape, and its outer circumference matches the regular hexagonal shape of the anti-rotation groove 7, thus ensuring that the compression ring 5 will not rotate when sliding within the anti-rotation groove 7. The circumferential fixation between the compression ring 5 and the protective sleeve 4 ensures that the compression ring 5 and the protective sleeve 4 can work together during the use of self-tapping screws.

[0021] The self-tapping screw has a ready-to-install state and a locked state. In the ready-to-install state, the compression ring 5 is threadedly connected to the lower end of the threaded post 33 and abuts against the upper limit surface 8. The lower end of the protective sleeve 4 is not higher than the lowest end of the screw body 3. At this time, the protective sleeve 4 can play a protective role to prevent the user from being stabbed by the sharp part of the screw body 3. In this application, the lower end of the protective sleeve 4 is flush with the lowest end of the screw body 3.

[0022] When installing self-tapping screws, the user pinches the protective sleeve 4 with their fingers, with the bottom of the screw body 3 against the desired installation position on the base. The bottom of the protective sleeve 4 also abuts against the base. The user can see the bottom of the screw body 3 through the viewing port 6, ensuring the self-tapping screw is accurately installed in the required position and preventing misalignment. After the screwdriver engages with the head 31 of the screw body 3, the screw body 3 rotates and begins to screw into the base. The screw body 3 moves downward, and the screw body 3 rotates relative to the compression ring 5. The compression ring 5 moves upward along the screw body 3. Initially, the downward screwing speed of the screw body 3 is slower than the upward movement speed of the compression ring 5. The compression ring 5 and the protective sleeve 4 move upward synchronously and disengage from the base. Figure 4As the screw body 3 continues to screw in, hold the protective sleeve 4 to prevent the screw body 3 from wobbling. The screw body 3's downward screwing speed gradually increases and then stabilizes. The compression ring 5 moves upward to the smooth column 32 and then disengages from the threaded column 33. The screw body 3 continues to rotate downward, and the compression ring 5 spins freely in the smooth column 32. After the lower end of the protective sleeve 4 abuts against the base, the head 31 of the screw body 3 applies downward pressure to the compression ring 5. The compression ring 5 moves downward along the anti-rotation groove 7 to the lower limit surface 9. The head 31, through the compression ring 5 and the lower limit surface 9, presses the lower end of the protective sleeve 4 firmly onto the base. The screw body 3 is tightened, and the self-tapping screw is now installed and in a locked state. Figure 5 .

[0023] The implementation principle of this embodiment is as follows: This protective self-tapping screw, through the cooperation of the protective sleeve 4 and the compression ring 5, prevents the user from being injured in the pre-installation state. The viewing port 6 allows the user to accurately see the bottom of the screw body 3, preventing misalignment. In the locked state, the head 31 of the screw body 3 presses the compression ring 5 against the lower limit surface 9, achieving stable installation. Compared with existing technologies, this solves both the problem of self-tapping screws easily injuring users and the problem of misalignment, improving the safety and accuracy of self-tapping screw use.

[0024] Example 2 The difference between this embodiment and the above embodiment is that the self-tapping screw also includes a cap 10. In the locked state, the upper end of the protective sleeve 4 is higher than the upper side of the head 31 of the screw body 3. The cap 10 is embedded in the upper end of the protective sleeve 4 and abuts against the upper side of the head 31.

[0025] The function of the cap 10 is to further protect the head 31 of the screw body 3 from external impacts and damage. The cap 10 can be made of materials such as rubber or plastic, and has a certain degree of elasticity and cushioning performance.

[0026] The implementation principle of this embodiment is as follows: After adding the cap 10, the head 31 of the screw body 3 can be better protected in the locked state, which improves the overall protective performance of the self-tapping screw, further enhances the quality and service life of the product, and has a more comprehensive improvement in protection compared with the existing technology.

[0027] Example 3 The difference between this embodiment and the previous embodiment is that the anti-rotation groove 7 has a regular hexagonal cross-section, and the compression ring 5 is basically hexagonal nut-shaped. This design makes the fit between the compression ring 5 and the anti-rotation groove 7 tighter and more stable, better restricting the rotation of the compression ring 5 and ensuring the stability of the self-tapping screw during use. The implementation principle of this embodiment is as follows: the regular hexagonal anti-rotation groove 7 and the hexagonal nut-shaped compression ring 5 work together to effectively enhance the circumferential fixing effect between the compression ring 5 and the protective sleeve 4, preventing the compression ring 5 from rotating during sliding, thereby improving the accuracy and stability of the self-tapping screw during installation. Compared with the prior art, it has a significant improvement in structural stability.

[0028] Example 4 The difference between this embodiment and the above embodiment is that the self-tapping screw also includes a rubber pad 11, which is disposed along the inner circumference of the upper end of the anti-rotation groove 7. In the installation state, the compression ring 5 compresses the rubber pad 11. The rubber pad 11 is elastic, and when the compression ring 5 compresses the rubber pad 11, it can play a role in buffering and sealing. At the same time, it can also increase the friction between the compression ring 5 and the protective sleeve 4, making the compression ring 5 more stable in the installation state.

[0029] The implementation principle of this embodiment is as follows: the rubber pad 11 provides cushioning and sealing in the ready-to-install state, increases the stability of the compression ring 5, and prevents the compression ring 5 from loosening when not in use. Compared with the prior art, this improves the reliability and stability of the self-tapping screw in the ready-to-install state.

[0030] Example 5 The difference between this embodiment and the previous embodiment is that two viewing ports 6 are provided, located on the left and right sides of the protective sleeve 4, with the lower side of the viewing ports 6 extending to their lower ends. The two viewing ports 6 allow the user to see the bottom of the screw body 3 from different angles, further improving the accuracy of operation.

[0031] The implementation principle of this embodiment is as follows: the design of two viewing ports 6 increases the angle and range of observation, allowing the user to observe the bottom of the screw body 3 more comprehensively during operation, thereby more accurately placing the screw body 3 against the base. Compared with the design of a single viewing port 6, it improves the accuracy and efficiency of installation and is a further optimization of the existing technology.

[0032] Example 6 The difference between this embodiment and the previous embodiment is that the lower side of the rubber pad is flush with the upper side of the viewing port, and a chamfer 12 is provided on the lower circumference of the rubber pad. The chamfer facilitates the upward pushing of the extrusion ring into the upper end of the anti-rotation groove and abutting against the upper limit surface.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

[0034] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A self-tapping screw having a protective effect, characterized in that, The screw body includes a screw body, a protective sleeve, and a compression ring. The screw body is vertically oriented and includes a head, a smooth cylindrical portion, and a threaded cylindrical portion arranged from top to bottom. The protective sleeve is vertically fitted onto the compression ring. The side of the protective sleeve is also provided with a viewing port for easy viewing of the bottom of the screw body. The inner side of the protective sleeve is provided with an anti-rotation groove that is adapted to the compression ring. The outer periphery of the compression ring slides in conjunction with the anti-rotation groove. The compression ring and the protective sleeve are circumferentially fixed. The upper and lower ends of the anti-rotation groove are respectively provided with an upper limit surface and a lower limit surface. The self-tapping screw has a ready-to-install state and a locked state. In the ready-to-install state, the compression ring is threadedly connected to the lower end of the threaded post and abuts against the upper limit surface. The lower end of the protective sleeve is not higher than the lowest end of the screw body. In the locked state, the head of the screw body presses the compression ring against the lower limit surface. The compression ring is sleeved on the smooth post and disengaged from the threaded post.

2. A self-tapping screw with a protective effect according to claim 1, characterized in that, The self-tapping screw also includes a cap. In the locked state, the upper end of the protective sleeve is higher than the upper side of the head of the screw body. The cap is embedded in the upper end of the protective sleeve and abuts against the upper side of the head.

3. A self-tapping screw with protective effect according to claim 2, characterized in that, The anti-rotation groove has a regular hexagonal cross-section, and the compression ring is basically shaped like a hexagonal nut.

4. A self-tapping screw with protective effect according to claim 3, characterized in that, The self-tapping screw also includes a rubber pad, which is arranged along the inner circumference of the upper end of the anti-rotation groove. In the installation state, the compression ring compresses the rubber pad.

5. A self-tapping screw with protective effect according to claim 1, characterized in that, The transparent opening is provided in two places, located on the left and right sides of the protective cover, with the lower side of the transparent opening extending to the lower end of the transparent opening.

6. A self-tapping screw with protective effect according to claim 4, characterized in that, The lower side of the rubber pad is flush with the upper side of the viewing port, and the lower periphery of the rubber pad is chamfered.

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