CN219733856U - Fastening screw with retaining structure - Google Patents

Abstract

The utility model provides a fastening screw with a retaining structure, which comprises a fixed screw body, wherein a screw cap is arranged at the rear end of the fixed screw body, an inserting hole is formed in the screw cap, an inserting strip is connected in the inserting hole, a convex structure is formed on the surface of the front end of the fixed screw body, facing the inserting strip, of the corresponding inserting strip, a concave structure is formed on the surface of the front end of the fixed screw body, facing the inserting strip, of the fixed screw body, retaining grooves are formed in the surface of the fixed screw body, two retaining grooves are arranged at intervals in front of and behind, retaining protrusions are arranged on the surface of the inserting strip, facing the fixed screw body, and the retaining protrusions are connected with the retaining grooves at the rear side. In the initial state, the cutting is connected in the jack, the retaining protrusion on the cutting is connected with the retaining groove at the rear side, the cutting can be limited from being outwards separated from the jack, after the cutting is knocked in, the cutting moves forwards, the retaining protrusion on the cutting is connected with the retaining groove at the front side, so that the cutting can be limited to move backwards, and the cutting which expands and deforms is prevented from moving backwards to recover deformation.

Description

Fastening screw with retaining structure

Technical Field

The utility model relates to the technical field of hardware fasteners, in particular to a fastening screw with a backstop structure.

Background

The inserting sheet type fastening screw consists of a fixing piece and an inserting sheet, wherein the fixing piece is firstly inserted into a hole which is punched in advance in a wall, then the inserting sheet is knocked in, the inserting sheet is extruded by the fixing piece when being knocked in, and the inserting sheet is gradually outwards expanded, so that the whole screw is limited to be separated, and the inserting sheet type expansion screw is disclosed in a patent with a patent number of CN 201420298098.9.

However, after the insert is knocked in, the insert forms friction with the hole wall and the fixing piece through the insert to realize self-locking, and the insert is easy to fall off under the trend of recovering deformation, so that fastening failure is caused.

Disclosure of Invention

In order to solve the problems pointed out in the background art, the utility model provides a fastening screw with a retaining structure, which can prevent an inserting sheet from falling out through the retaining structure after the inserting sheet is knocked in.

The technical scheme of the utility model is realized as follows:

the utility model provides a fastening screw with stopping structure, including the staple body, the rear end of staple body is equipped with the nut, be equipped with the jack on the nut, jack in-connection has the cutting, form protruding structure on the face towards the cutting of the front end of staple body, form the sunk structure on the face towards the staple body of the front end of corresponding cutting, the setting is pasted mutually to the face in opposite directions of staple body and cutting, be equipped with the stopping groove on the face towards the cutting on the staple body, the stopping groove is equipped with two, interval sets up around two stopping grooves, be equipped with the stopping arch on the face towards the staple body on the cutting, the stopping arch is connected with the stopping groove that is located the rear side.

The utility model is further arranged that the retaining groove penetrates through two sides of the fixed nail body.

The utility model further provides that the retaining groove is arranged near the rear end of the fixed nail body.

By adopting the technical scheme, the retaining groove is arranged close to the rear end of the fixed nail body, so that the situation that the retaining protrusion is separated from the retaining groove and cannot form limit due to expansion deformation of the cutting can be avoided.

The utility model is further arranged that the sections of the fixed nail body and the cutting are semicircular, and the radii of the fixed nail body and the cutting are equal.

The utility model is further arranged that the rear end of the cutting is provided with a beating cap.

The utility model further provides that the convex structures and the concave structures are in surface contact.

By adopting the technical scheme, the utility model has the beneficial effects that:

according to the fastening screw with the retaining structure, in an initial state, the cutting is connected in the jack, the retaining protrusion on the cutting is connected with the retaining groove at the rear side, the cutting can be prevented from being outwards separated from the jack, after the cutting is knocked in, the cutting moves forwards, the retaining protrusion on the cutting is connected with the retaining groove at the front side, the cutting can be prevented from moving backwards, and the cutting subjected to expansion deformation is prevented from moving backwards to recover deformation.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is an exploded view of the present utility model.

Fig. 3 is a cross-sectional view of the present utility model.

The reference numerals in the drawings indicate: the nail comprises a fixed nail body 1, a nail cap 11, an inserting hole 12, a protruding structure 13, a retaining groove 14, a cutting 2, a recessed structure 21, a retaining protrusion 22 and a knocking cap 23.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model is illustrated below with reference to fig. 1-3:

example 1: the utility model provides a fastening screw with stopping structure, including the staple body 1, the cross-section of staple body 1 is semi-circular, the rear end of staple body 1 is equipped with circular shape nut 11, be equipped with jack 12 on the nut 11, jack 12 internal connection has cutting 2, the cross-section of cutting 2 is semi-circular, the radius of staple body 1 and cutting 2 equals, the opposite sides of staple body 1 and cutting 2 paste the setting mutually, staple body 1 and cutting 2 combine together to form cylindrical structure, form protruding structure 13 on the face of the front end of staple body 1 towards cutting 2, form concave structure 21 on the face of the front end towards staple body 1 of corresponding cutting 2, protruding structure 13 and concave structure 21 are the face contact, when cutting 2 moves forward, protruding structure 13 and concave structure 21 extrudees each other, make cutting 2 take place expansion deformation, the rear end of cutting 2 is equipped with and beats cap 23. The above is the prior art, and the following is an improved technical scheme of the utility model:

the surface of the fixed nail body 1 facing the cutting 2 is provided with two retaining grooves 14, the retaining grooves 14 are arranged at intervals in front of and behind, the retaining grooves 14 penetrate through two sides of the fixed nail body 1, the two retaining grooves 14 are arranged near the rear end of the fixed nail body 1, the surface of the cutting 2 facing the fixed nail body 1 is provided with retaining protrusions 22, and the retaining protrusions 22 are connected with the retaining grooves 14 positioned on the rear side.

When the fixing nail is used, firstly, holes are punched on the wall, then the fixing nail body 1 is inserted into the punched holes, then the tool is used for knocking in the cutting 2 through the knocking cap 23, the protruding structures 13 and the recessed structures 21 at the front ends of the cutting 2 and the fixing nail body 1 are mutually extruded, so that the front ends of the cutting 2 are expanded and deformed, and the cutting 2 is in limiting and fixing fit with the hole wall. During the forward movement of the cutting 2, the retaining projection 22 passes over the first retaining groove 14 and is connected to the second retaining groove 14, so that the cutting 2 is prevented from being deformed again after the expansion of the cutting 2.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the utility model.

Claims (6)

1. The utility model provides a fastening screw with stopping structure, includes the staple body, and the rear end of staple body is equipped with the nut, is equipped with the jack on the nut, and the jack in-connection has the cutting, forms protruding structure on the face of the orientation cutting of the front end of staple body, forms recessed structure on the face of the orientation staple body of the front end of the cutting that corresponds, and the opposite sides of staple body and cutting paste mutually and set up, its characterized in that: the surface of the fixed nail body facing the cutting is provided with two retaining grooves, the two retaining grooves are arranged at intervals, the surface of the cutting facing the fixed nail body is provided with retaining protrusions, and the retaining protrusions are connected with the retaining grooves at the rear side.

2. A set screw with a backstop structure according to claim 1, wherein: the retaining groove penetrates through two sides of the fixed nail body.

3. A set screw with a backstop structure according to claim 1, wherein: the retaining groove is arranged near the rear end of the fixed nail body.

4. A set screw with a backstop structure according to claim 1, wherein: the section of the fixed nail body and the section of the cutting are semicircular, and the radius of the fixed nail body is equal to that of the cutting.

5. A set screw with a backstop structure according to claim 1, wherein: the rear end of the cutting is provided with a beating cap.

6. A set screw with a backstop structure according to claim 1, wherein: the convex structures and the concave structures are in surface contact.