Fastening screw with retreat-preventing structure

Abstract

The utility model provides a fastening screw with retreat -stop structure relates to screw technical field, including screw body, the top fixed mounting of screw body has the top cover, and the top cover is equipped with the slot with screw body, and the both sides in the slot are all equipped with the opening and are all penetrated, and the inside of two openings all are slidably installed with the clamping plate, and the opposite side of two clamping plates all are fixedly installed with second magnet, and the inside of slot is slidably installed with the push rod, and the top fixed mounting of push rod has the top plate, when the screw body is completely entered the inside of mounting hole, the staff inserts the push rod into the inside of slot, then pushes the top plate, and the two inclined surfaces of push rod respectively with the inclined surface contact of two clamping plates, and then pushes two clamping plates away from each other, and the tip of clamping plate contacts with the inner wall of mounting hole, and then enters the inside of installation position, when the outer wall of top plate is pasted with the top cover, the iron block contacts with first magnet at this moment, and the iron block is adsorbed on the surface of first magnet, at this moment, two clamping plates can prevent the screw body from backtracking.

Description

Technical Field

[0001] This utility model relates to the field of screw technology, and in particular to a fastening screw with an anti-retraction structure. Background Technology

[0002] A screw is a tool that uses the physical and mathematical principles of inclined planes, circular rotation, and friction to gradually fasten objects and machine parts. Screws are indispensable industrial necessities in daily life: extremely small screws are used in cameras, eyeglasses, clocks, and electronics; general screws are used in televisions, electrical products, musical instruments, and furniture; large screws and nuts are used in engineering, construction, and bridges; and a combination of screws of different sizes is used in transportation equipment, airplanes, trams, and automobiles.

[0003] In existing technologies, when fastening screws are exposed to humid, salt spray, or acidic / alkaline environments for extended periods, electrochemical or chemical corrosion can occur. This corrosion wears down the thread surface, reducing the effective contact area, making it impossible to maintain the preload, and eventually causing the screw to loosen. Loosening of the screw may result in poor engagement strength, leading to poor fastening performance and making the screw prone to slippage or even falling out. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art that fastening screws may become loose due to corrosion, and that loose screws may result in poor clamping strength, leading to poor fastening effect and easy screw retraction or even falling off. The invention proposes a fastening screw with an anti-retraction structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a fastening screw with an anti-retraction structure, comprising a screw body, a top cover fixedly installed on the top of the screw body, a slot formed between the screw body and the top cover, an opening extending through both sides of the slot, a retaining plate slidably installed inside each of the two openings, a second magnet fixedly installed on the opposite side of each of the two retaining plates, a push rod slidably installed inside the slot, a top plate fixedly installed on the top of the push rod, two iron blocks fixedly installed at the bottom of the top plate, two connecting grooves formed on the top of the top cover, and a first magnet fixedly installed on the inner wall of the connecting groove.

[0006] Preferably, a sealing groove is provided on the top of the top cover, a sealing ring is fixedly installed on the inner wall of the sealing groove, and a plug ring is fixedly installed on the bottom of the top plate.

[0007] Preferably, a protective ring is fixedly installed at the bottom of the top cover.

[0008] Preferably, the outer wall of the screw body is provided with external threads.

[0009] Preferably, two rotating blocks are fixedly installed on the outer wall of the top cover, and multiple evenly distributed anti-slip strips are fixedly installed on the outer wall of the top plate.

[0010] Preferably, the outer wall of the push rod is in contact with the inner wall of the slot, and the outer wall of the card plate is in contact with the inner wall of the opening.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, when the screw body is fully inserted into the mounting hole, the worker inserts the push rod into the slot and then pushes the top plate. The two inclined surfaces of the push rod contact the inclined surfaces of the two clamping plates respectively, thereby pushing the two clamping plates away from each other. The tips of the clamping plates contact the inner wall of the mounting hole and then enter the mounting position. When the outer wall of the top plate is in contact with the top cover, the iron block contacts the first magnet and is attracted to the surface of the first magnet. At this time, the two clamping plates can prevent the screw body from retracting.

[0012] 2. In this utility model, when the push rod moves along the slot, the insert ring moves towards the sealing groove and enters the sealing groove. The inclined surface of the insert ring contacts the sealing ring, and the sealing ring is compressed by the pressure of the insert ring. When the top plate and the top cover are in contact, the insert ring is completely inserted into the sealing groove. The elastic force of the sealing ring on the insert ring increases the friction between the two, which reduces the gap between them, improves the sealing performance, and prevents moisture from entering the connecting groove and contacting the first magnet. Attached Figure Description

[0013] Figure 1 This utility model provides an overall perspective view of a fastening screw with an anti-retraction structure; Figure 2 This utility model provides a perspective view of the internal structure of the screw body of a fastening screw with an anti-retraction structure; Figure 3 A perspective view of a push rod with a locking structure for a fastening screw is provided for this utility model; Figure 4 for Figure 2 Enlarged view of point A.

[0014] Legend: 1. Screw body; 2. Top cover; 3. Rotating block; 4. External thread; 5. Top plate; 6. Slot; 7. Protective ring; 8. Sealing groove; 9. Sealing ring; 10. Connecting groove; 11. First magnet; 12. Anti-slip strip; 13. Insert ring; 14. Iron block; 15. Push rod; 16. Clamping plate; 17. Second magnet; 18. Opening. Detailed Implementation

[0015] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0017] Example 1, such as Figures 1-4 As shown, this utility model provides a fastening screw with an anti-retraction structure, including a screw body 1, a top cover 2 fixedly installed on the top of the screw body 1, a slot 6 formed between the screw body 1 and the top cover 2, an opening 18 extending through both sides of the slot 6, a retaining plate 16 slidably installed inside each of the two openings 18, a second magnet 17 fixedly installed on the opposite side of each of the two retaining plates 16, a push rod 15 slidably installed inside the slot 6, a top plate 5 fixedly installed on the top of the push rod 15, two iron blocks 14 fixedly installed at the bottom of the top plate 5, and two connecting grooves 10 formed on the top of the top cover 2, with a first magnet 11 fixedly installed on the inner wall of the connecting groove 10.

[0018] The effect achieved by the entire embodiment 1 is that when the screw body 1 is fully inserted into the mounting hole, the worker inserts the push rod 15 into the slot 6 and then pushes the top plate 5. The two inclined surfaces of the push rod 15 contact the inclined surfaces of the two retaining plates 16 respectively, thereby pushing the two retaining plates 16 away from each other. The tips of the retaining plates 16 contact the inner wall of the mounting hole and then enter the mounting position. When the outer wall of the top plate 5 is in contact with the top cover 2, the iron block 14 contacts the first magnet 11 and the iron block 14 is attracted to the surface of the first magnet 11. At this time, the two retaining plates 16 can prevent the screw body 1 from retracting.

[0019] Example 2, as Figures 1-4 As shown, the top cover 2 has a sealing groove 8, a sealing ring 9 is fixedly installed on the inner wall of the sealing groove 8, and a plug ring 13 is fixedly installed at the bottom of the top plate 5.

[0020] Furthermore, a protective ring 7 is fixedly installed at the bottom of the top cover 2. When the top cover 2 is rotated, the protective ring 7 rotates, and then the tip of the protective ring 7 contacts the outer wall of the installation position until it is completely inserted into the installation position. At this time, the protective ring 7 can provide a sealing effect and reduce the probability of moisture contacting the external thread 4.

[0021] Furthermore, the outer wall of the screw body 1 is provided with external threads 4.

[0022] Furthermore, two rotating blocks 3 are fixedly installed on the outer wall of the top cover 2 to facilitate the rotation of the top cover 2 by the staff. Multiple evenly distributed anti-slip strips 12 are fixedly installed on the outer wall of the top plate 5 to increase the friction between the staff and the top plate 5, prevent the staff from slipping, and facilitate the staff to pull the top plate 5.

[0023] Furthermore, the outer wall of the push rod 15 fits against the inner wall of the slot 6 to prevent the push rod 15 from tilting, and the outer wall of the latch plate 16 fits against the inner wall of the opening 18 to prevent the latch plate 16 from tilting.

[0024] The effect achieved by the entire embodiment 2 is that when the push rod 15 moves along the slot 6, the insert ring 13 moves towards the sealing groove 8 and enters the interior of the sealing groove 8. The inclined surface of the insert ring 13 contacts the sealing ring 9, and the sealing ring 9 is compressed by the pressure of the insert ring 13. When the top plate 5 and the top cover 2 are in contact, the insert ring 13 is completely inserted into the interior of the sealing groove 8. The elastic force of the sealing ring 9 on the insert ring 13 increases the friction between the two, which reduces the gap between the two, improves the sealing performance, and prevents moisture from entering the interior of the connecting groove 10 and contacting the first magnet 11.

[0025] Working principle: During installation, the operator rotates the rotating block 3 to insert the screw body 1 into the installation position. When the screw body 1 is fully inserted into the installation hole, the operator inserts the push rod 15 into the slot 6 and then pushes the top plate 5. The two inclined surfaces of the push rod 15 contact the inclined surfaces of the two retaining plates 16 respectively, thereby pushing the two retaining plates 16 away from each other. The tips of the retaining plates 16 contact the inner wall of the installation hole and then enter the installation position. When the outer wall of the top plate 5 is in contact with the top cover 2, the iron block 14 contacts the first magnet 11 and the iron block 14 is attracted to the surface of the first magnet 11. At this time, the two retaining plates 16 can prevent the screw body 1 from retracting. As the push rod 15 moves along the slot 6, the insert ring 13 moves towards the sealing groove 8, entering the interior of the sealing groove 8. The inclined surface of the insert ring 13 contacts the sealing ring 9, and the sealing ring 9 is compressed by the pressure of the insert ring 13. When the top plate 5 and the top cover 2 are in contact, the insert ring 13 is fully inserted into the sealing groove 8. The elastic force of the sealing ring 9 on the insert ring 13 increases the friction between the two, reducing the gap between them, improving the sealing performance, and preventing moisture from entering the connecting groove 10 and contacting the first magnet 11. When the top cover 2 is rotated, the protective ring 7 rotates, and then the tip of the protective ring 7 contacts the outer wall of the installation position until it is fully inserted into the installation position. At this time, the protective ring 7 can provide a sealing effect, reducing the probability of moisture contacting the external thread 4.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A fastening screw with an anti-retraction structure, comprising a screw body (1), characterized in that: The screw body (1) is fixedly mounted with a top cover (2). The screw body (1) and the top cover (2) are provided with a slot (6). The slot (6) has openings (18) on both sides. The slot (6) is slidably mounted with a card plate (16) inside each of the two openings (18). The slot (6) is fixedly mounted with a second magnet (17) on the opposite side of each of the two card plates (16). The slot (6) is slidably mounted with a push rod (15). The push rod (15) is fixedly mounted with a top plate (5). The top plate (5) is fixedly mounted with two iron blocks (14) at the bottom. The top cover (2) has two connecting grooves (10) on the top. The connecting grooves (10) are fixedly mounted with a first magnet (11) on the inner wall.

2. A fastening screw with an anti-retraction structure according to claim 1, characterized in that: The top cover (2) has a sealing groove (8) at the top, and a sealing ring (9) is fixedly installed on the inner wall of the sealing groove (8). A plug ring (13) is fixedly installed at the bottom of the top plate (5).

3. A fastening screw with an anti-retraction structure according to claim 1, characterized in that: A protective ring (7) is fixedly installed at the bottom of the top cover (2).

4. A fastening screw with an anti-retraction structure according to claim 1, characterized in that: The screw body (1) has an external thread (4) on its outer wall.

5. A fastening screw with an anti-retraction structure according to claim 1, characterized in that: Two rotating blocks (3) are fixedly installed on the outer wall of the top cover (2), and multiple evenly distributed anti-slip strips (12) are fixedly installed on the outer wall of the top plate (5).

6. A fastening screw with an anti-retraction structure according to claim 1, characterized in that: The outer wall of the push rod (15) is in contact with the inner wall of the slot (6), and the outer wall of the card plate (16) is in contact with the inner wall of the opening (18).

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