Anti-falling screw

Abstract

The utility model discloses an anti-drop screw, which relates to the field of engineering parts, and comprises a screw main body, a first raised insert is arranged on the outer surface of the screw main body, a mounting hole is arranged in the screw main body, a connecting plate is arranged at the bottom of the screw main body, a connecting column is movably arranged in the mounting hole, and the connecting column is connected with the screw main body. The top end of the connecting column penetrates through the connecting plate and the connecting block, a connecting hole is formed in the connecting block, and a metal baffle is arranged on the periphery of the connecting block. An external part is matched with the connecting hole to drive the connecting block to rotate, then the screw body is driven to rotate, the first protruding inserting piece on the screw body rotates to form a hole in a wall, the screw body enters the wall or the ground, and then when external impact occurs, external objects can move along with the surface of the metal baffle, so that the screw body is prevented from being damaged. And the problem that the screw body is driven to generate angle change, so that a screw hole is damaged, and the screw falls off is solved.

Description

Technical Field

[0001] The utility model relates to the field of engineering parts, in particular to an anti-falling screw. Background Art

[0002] Screws are tools that use the physical and mathematical principles of the circular rotation of an object's inclined surface and friction to gradually fasten objects and parts. Screw is a common term for fasteners and is used in daily life. Screws are an indispensable industrial necessity in daily life: for example, very small screws are used in cameras, glasses, clocks, electronics, etc.; general screws are used in televisions, electrical products, musical instruments, furniture, etc.; large screws and nuts are used in engineering, construction, and bridges; transportation equipment, airplanes, trams, cars, etc. use both large and small screws. Screws are used in the engineering field to connect building materials on one side.

[0003] Existing fixing screws are generally divided into two types: one is a screw with a corresponding threaded hole on the connecting object, which can be fixed by turning the screw to fit the threaded hole; the other is a screw with its own thread slotted into the building to obtain a corresponding threaded hole, thereby achieving the purpose of fixing the object. Among the second type of screws with their own holes, after installation, the threaded hole position may shift due to operational problems during installation, making the installation itself not tight. At this time, if the angle is further shifted by external force, it is very likely to loosen the screw and cause the screw to fall out. For this reason, many manufacturers use anti-falling screws when there is a need to prevent screw fixation from falling out.

[0004] Existing anti-falling screws are generally made by driving an expansion bolt into a hole on the ground or wall, and then tightening the nut on the expansion bolt with a wrench. The bolt moves outward while the outer metal sleeve does not move. Therefore, the large head under the bolt expands the metal sleeve to fill the entire hole.

[0005] However, when the existing anti-falling screws are subjected to external impact during actual use, the screws exert force on the threaded holes, and the threaded holes may break, causing the screws to move therein, causing the screws to loosen in the holes and causing the screws to fall off. Utility Model Content

[0006] Based on this, the purpose of the present invention is to provide an anti-falling screw to solve the technical problem.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solution: an anti-falling screw, comprising a screw body, a first raised insert provided on the outer surface of the screw body, a mounting hole provided in the screw body, a connecting plate provided at the bottom of the screw body, a connecting column movably provided in the mounting hole, the top end of the connecting column passes through a connecting plate connecting block, a connecting hole is provided in the connecting block, and a metal baffle is provided around the connecting block.

[0008] By adopting the above technical solution, the first raised insert is driven to rotate by rotating the screw body, and then the screw is driven into the wall or the ground. At the same time, the corresponding connecting block is driven to move toward the wall or the ground, so that the metal baffle is squeezed and stretched open. When it is hit by external impact, it can move to a certain extent to cushion the impact, while preventing the screw body from shifting and causing loosening.

[0009] The present invention is further configured such that a limit turntable is provided at one end of the connecting column in the mounting hole, and a second protruding insert is provided around the outer periphery of the limit turntable, wherein the second protruding insert has a threaded rotation direction opposite to that of the first protruding insert.

[0010] By adopting the above technical solution, the second raised insert on the limit turntable drives the connecting column to move, thereby controlling the distance between the connecting block and the wall or the ground.

[0011] The present invention is further configured such that a limiting groove is provided on the top end of the mounting hole to cooperate with the second protruding insert.

[0012] By adopting the above technical solution, the limiting groove cooperates with the second protruding insert so that the second protruding insert can only rotate in the opposite direction to the first protruding insert, so that the screw body and the limiting turntable do not affect each other when rotating.

[0013] The present invention is further configured such that a threaded groove is provided in the mounting hole at the bottom of the limiting groove to cooperate with the second protruding insert.

[0014] By adopting the above technical solution, the second protruding insert-type connecting column moves up and down in coordination with the provided threaded groove.

[0015] The utility model is further configured such that an opening is provided in the screw body, a limiting metal strip is slidably provided in the opening, a split metal block is provided at one end of the opening away from the mounting hole, and the split metal block divides the opening into a pair of guide grooves.

[0016] By adopting the above technical solution, the limiting metal strip is divided into two parts by splitting the metal block and pushed out of the screw body. At this time, the screw is fixed by the cooperation between the limiting metal strip and the screw groove opened in the screw body.

[0017] The utility model is further configured such that an auxiliary drill bit is provided at the bottom of the screw body.

[0018] By adopting the above technical solution, the screw body can be conveniently driven into the wall and the ground through the auxiliary drill bit.

[0019] The utility model is further configured such that a buffer spring is provided in the mounting hole.

[0020] By adopting the above technical solution, a reverse force is applied to the user through the buffer spring, making it easier for the user to determine the position of the connecting column.

[0021] In summary, the present invention has the following beneficial effects:

[0022] The utility model drives the connecting block to rotate by cooperating with the connecting hole through the external parts, and then drives the screw body to rotate, so that the first protruding plug-in piece on the screw body rotates to open the hole in the wall, so that the screw body enters the wall or the ground. Thereafter, the connecting block is reversed to reverse the connecting column, so that the limit turntable is reversed and drives the second protruding plug-in piece to rotate, and cooperates with the threaded groove to drive the limit turntable to move downward. In the process of downward movement, the limiting metal strip is squeezed and pushed forward, so that the limiting metal strip is cut into two pieces by the split metal block and is placed outside the screw body, and cooperates with the groove opened by the first protruding plug-in piece to limit and fix the screw. At the same time, when the connecting block moves downward, it cooperates with the wall or the ground to squeeze the baffle to make it expand. Later, when there is an external impact, the external object will move with the surface of the metal baffle, and will not drive the screw body to change its angle, resulting in damage to the screw hole, and then causing the problem of the screw falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0025] Figure 3 This is a cross-sectional view of the overall structure of the utility model;

[0026] Figure 4 For the utility model Figure 3 A in the middle is an enlarged structural diagram;

[0027] Figure 5 For the utility model Figure 3 Enlarged structural diagram at point B in the middle.

[0028] In the figure: 1. Screw body; 2. First raised insert; 3. Auxiliary drill bit; 4. Opening; 5. Connecting block; 6. Connecting hole; 7. Metal baffle; 8. Connecting column; 9. Connecting plate; 10. Mounting hole; 11. Buffer spring; 12. Limiting metal strip; 13. Split metal block; 14. Guide groove; 15. Threaded groove; 16. Limiting groove; 17. Second raised insert; 18. Limiting turntable. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] The following describes an embodiment of the present invention based on its overall structure.

[0031] An anti-falling screw, such as Figure 1-5 As shown, it includes a screw body 1, and a first protruding insert 2 is provided on the outer surface of the screw body 1. By rotating the screw body 1, the first protruding insert 2 can be driven to rotate to perform a groove operation on the wall or the ground. Then, by rotating the first protruding insert, the screw body is inserted into the wall or the ground to complete the installation. However, after the installation is completed, if an external object hits the screw body 1, it may cause the screw body 1 to damage the groove, thereby causing the screw body 1 to loosen and fall in the groove. To this end, the present application provides a solution to the above problem;

[0032] Specifically, a mounting hole 10 is provided in the screw body 1, a connecting plate 9 is provided at the bottom of the screw body 1, a connecting column 8 is movably provided in the mounting hole 10, and a limit turntable 18 is provided at one end of the connecting column 8 in the mounting hole 10. A second protruding plug 17 is provided around the outer circle of the limit turntable 18. A threaded groove 15 is provided in the mounting hole 10 at the bottom of the limit groove 16 to cooperate with the second protruding plug 17. The second protruding plug 17 is threaded in the opposite direction of the first protruding plug 2. The top of the connecting column 8 passes through the connecting plate 9 to connect the block 5. The connecting block 5 is provided with a connecting hole 6. A metal baffle 7 is provided on the upper circle of the connecting block 5. Through such a setting, after the screw body 1 is installed in place, the connecting column 8 can be controlled by rotating the limit dial 18 to drive the connecting block 5 to move synchronously toward the wall and the ground. At this time, the metal baffle 7 is squeezed and deformed in contact with the wall and the ground, thereby causing the metal baffle 7 to unfold. At this time, if an object contacts the metal baffle 7, it will slide along the surface of the metal baffle 7 and will not affect the screw body 1, thereby ensuring that the groove structure opened by the screw body 1 will not be damaged.

[0033] Furthermore, a limiting groove 16 is provided at the top end of the mounting hole 10 to cooperate with the second protruding insert 17 , and the limiting groove 16 prevents the limiting turntable 18 from rotating in the same direction as the first protruding insert 2 .

[0034] An opening 4 is provided in the screw body 1 , a limiting metal strip 12 is slidably provided in the opening 4 , a split metal block 13 is provided at one end of the opening 4 away from the mounting hole 10 , and the split metal block 13 divides the opening 4 into a pair of guide grooves 14 .

[0035] An auxiliary drill bit 3 is provided at the bottom of the screw body 1, which divides the limiting metal strip 12 into two pieces by splitting the metal block 13 and pushes it out of the screw body. At this time, the screw is fixed by the cooperation between the limiting metal strip 12 and the screw groove opened in the screw body 1.

[0036] A buffer spring 11 is provided in the mounting hole 10 , and the buffer spring 11 applies a reverse force to the user, making it easier for the user to determine the position of the connecting column.

[0037] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not limitations on the present invention. The specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and purpose of the present invention, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An anti-drop screw, comprising a screw body (1), characterized in that: The outer surface of the screw body (1) is provided with a first protruding insert (2), a mounting hole (10) is provided in the screw body (1), a connecting plate (9) is provided at the bottom of the screw body (1), a connecting column (8) is movably provided in the mounting hole (10), the top end of the connecting column (8) passes through the connecting plate (9) connecting block (5), the connecting block (5) is provided with a connecting hole (6), and a metal baffle (7) is provided around the upper circle of the connecting block (5).

2. The anti-falling screw according to claim 1, characterized in that: A limit turntable (18) is provided at one end of the connecting column (8) in the mounting hole (10), and a second protruding insert (17) is provided around the outer periphery of the limit turntable (18), wherein the second protruding insert (17) and the first protruding insert (2) have a threaded rotation direction opposite to that of the second protruding insert (17).

3. The anti-falling screw according to claim 1, characterized in that: A limiting groove (16) is provided at the top end of the mounting hole (10) in cooperation with the second protruding insert (17).

4. The anti-falling screw according to claim 1, characterized in that: The mounting hole (10) is located at the bottom of the limiting groove (16) and is provided with a thread groove (15) in cooperation with the second protruding insert (17).

5. The anti-falling screw according to claim 1, characterized in that: An opening (4) is provided in the screw body (1), a limiting metal strip (12) is slidably provided in the opening (4), a split metal block (13) is provided at one end of the opening (4) away from the mounting hole (10), and the split metal block (13) divides the opening (4) into a pair of guide grooves (14).

6. The anti-falling screw according to claim 1, characterized in that: An auxiliary drill bit (3) is provided at the bottom of the screw body (1).

7. The anti-falling screw according to claim 1, characterized in that: A buffer spring (11) is provided in the mounting hole (10).

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