CN221074925U - Flat head terrace screw - Google Patents

Abstract

The utility model discloses a flat head terrace screw, which relates to the technical field of screws, and aims to improve the sliding between a screw body and a plate, and also can loosen the screw, so that an anti-loosening ring cannot be in contact with the plate, and the anti-loosening problem cannot be realized. According to the utility model, the round platform block is driven to reset in the process of extending the compression spring, and the round platform block respectively pushes the two connecting blocks to horizontally move, so that the two limiting plugs respectively extend out of the fixing rod and are inserted into the plate, the screw rod is limited, and the screw rod can be effectively prevented from falling off.

Description

Flat head terrace screw

Technical Field

The utility model relates to the field of screws, in particular to a flat head terrace screw.

Background

Screws, also known as "screws" and "threaded rods". In fact, screws are commonly known, and screws and screw shafts are distinguished from each other. The screw is generally called a wood screw; the screw is of a type with a pointed tip at the front end, has a larger screw pitch and is generally used for fastening wooden parts and plastic parts. The screw rod is a machine screw, the front end of which is flat-headed, the screw pitch is smaller and uniform, the screw rod is generally used for fastening metal and machine parts, the screw rod is a widely applied fastener, and the screw rod is a tool for fastening a machine part step by utilizing the physical and mathematical principles of the inclined circular rotation and friction force of an object.

According to the large flat head terrace screw disclosed by the Chinese utility model (bulletin number: CN 211059174U), barbs on the anti-rotating ring are abutted against a plate, so that the probability of loosening of the screw due to vibration is reduced, the fixing effect of the screw is improved, and the probability of relative rotation between the large flat head and the anti-rotating ring is reduced through the cooperation of a positioning column and a positioning groove, so that the anti-loosening effect of the anti-rotating ring on the screw is improved.

In the process of realizing the utility model, the inventor finds that at least the following problems exist in the technology, in the technical scheme, through the fact that the barbs on the anti-rotating ring are abutted against the plate, the loosening probability of the screw due to vibration is improved, the fixing effect of the screw is improved, but the anti-loosening effect realized by the contact of the anti-rotating ring and the plate is poor, if sliding occurs between the screw body and the plate, the screw is loosened, the anti-rotating ring cannot be contacted with the plate, and therefore, the anti-loosening cannot be realized, and therefore, a flat head terrace screw is proposed.

Disclosure of utility model

In order to improve the problem that the sliding between the screw body and the plate can loosen the screw and prevent the anti-rotation ring from contacting the plate, the utility model provides the flat head terrace screw.

The utility model provides a flat head terrace screw, which adopts the following technical scheme:

The flat head terrace screw comprises a screw flat head, a screw rod is vertically fixed on the lower surface of the screw flat head, a fixing rod is fixed in the middle of the screw rod, an inner hexagonal hole is formed in the upper end of the screw flat head, a movable block is connected with the inner portion of the inner hexagonal hole in a sliding mode, a connecting rod is fixed on the lower surface of the movable block, a round table block is fixed at the tail end of the connecting rod, an installation cavity is formed in the fixing rod, a compression spring elastically connected with the round table block is arranged at the lower end of the inside of the installation cavity, two connecting blocks are symmetrically connected with the outer wall of the round table block in a sliding mode, limiting plugs are respectively fixed on one sides of the two connecting blocks, two limiting pipes are symmetrically fixed on the inner wall of the fixing rod, and the two limiting pipes are all sleeved on the outer wall of the limiting plugs.

Through adopting above-mentioned technical scheme, through the in-process at compression spring self extension, drive the round platform piece and reset, the round platform piece promotes two connecting blocks respectively and carries out horizontal movement, makes two spacing plugs stretch out the dead lever respectively and inserts in the panel to carry out spacingly to the screw pole, and can effectually avoid the screw pole to take place the condition that drops.

Optionally, the lower surface of screw pole is provided with the self-tapping head, the movable block passes through between connecting rod and the screw pole and constitutes extending structure.

Through adopting above-mentioned technical scheme, through the self-tapping head that sets up on the screw pole, the user is settled the use to this screw with the help of self-tapping instrument.

Optionally, two one sides of spacing pipe all are connected with the reset spring with connecting block butt, reset spring cover is established at the outer wall of spacing plug.

Through adopting above-mentioned technical scheme, under reset spring's cooperation, promote the connecting block and remove, make two connecting blocks be close to each other, drive two spacing plugs respectively and remove to the installation intracavity.

Optionally, the surface of connecting rod just is provided with the limiting plate near the inside upper end of installation cavity.

Through adopting above-mentioned technical scheme, the limiting plate that sets up can avoid the connecting rod too much of motion.

Optionally, the outer wall of screw pole just is provided with the antiskid circle near the lower extreme of screw flat head, a plurality of antiskid bump are established to the lower surface equidistance of antiskid circle.

By adopting the technical scheme, the anti-skid convex points arranged on the lower surface of the anti-skid ring can play a certain anti-skid role.

Optionally, the lower surface symmetry of screw flat head is provided with two mounting, the antiskid circle passes through the buckling structure that constitutes between mounting and the screw flat head.

Through adopting above-mentioned technical scheme, insert the spacing hole on upper surface to the antiskid through the mounting to fix the screw flat head, reduce the condition that takes place to drop.

In summary, the utility model has the following beneficial effects:

1. according to the utility model, the round platform block is driven to reset in the process of extending the compression spring, and the round platform block respectively pushes the two connecting blocks to horizontally move, so that the two limiting plugs respectively extend out of the fixing rod and are inserted into the plate, thereby limiting the screw rod, and effectively avoiding the situation that the screw rod falls off;

2. The limiting pipe provided by the utility model plays a role in guiding, so that the round table blocks respectively push the two connecting blocks to horizontally move; under the cooperation of the reset spring, the connecting blocks are pushed to move, so that the two connecting blocks are mutually close to each other, and the two limiting plugs are respectively driven to move into the mounting cavity; the fixing piece is inserted into the limiting hole on the upper surface of the anti-slip ring, so that the flat head of the screw is fixed, and the falling-off condition is reduced.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic cross-sectional view of a fixing rod according to the present utility model;

FIG. 3 is a schematic perspective view of a truncated cone block according to the present utility model;

fig. 4 is a schematic perspective view of the flat head of the screw of the present utility model.

Reference numerals illustrate:

1. A screw flat head; 2. an inner hexagonal hole; 3. a screw rod; 4. a fixed rod; 5. self-tapping heads; 6. a movable block; 7. a connecting rod; 8. round table blocks; 9. a compression spring; 10. a connecting block; 11. a mounting cavity; 12. a limiting tube; 13. a return spring; 14. a limiting plate; 15. a limit plug; 16. an anti-slip ring; 17. anti-skid convex points; 18. and a fixing piece.

Detailed Description

The application is described in further detail below with reference to fig. 1-4.

Referring to fig. 1-3, the flat head terrace screw comprises a screw flat head 1, a screw rod 3 is vertically fixed on the lower surface of the screw flat head 1, a fixed rod 4 is fixed in the middle of the screw rod 3, an inner hexagonal hole 2 is formed in the upper end of the screw flat head 1, a movable block 6 is slidably connected in the inner hexagonal hole 2, a connecting rod 7 is fixed on the lower surface of the movable block 6, a round table block 8 is fixed at the tail end of the connecting rod 7, an installation cavity 11 is formed in the inner part of the fixed rod 4, a compression spring 9 elastically connected with the round table block 8 is arranged at the lower end of the installation cavity 11, two connecting blocks 10 are symmetrically and slidably connected with the outer wall of the round table block 8, limit plugs 15 are respectively fixed on one sides of the two connecting blocks 10, two limit tubes 12 are respectively and slidably arranged in the two limit plugs 12, the inner wall of the fixed rod 4 is symmetrically fixed with two limit tubes 12, the two limit tubes 12 are respectively sleeved on the outer wall of the limit plugs 15, the round table block 8 are driven to reset in the process of stretching of the compression spring 9, the round table block 8 is respectively pushed by the round table block 8 to horizontally move the two connecting blocks 10, so that the two connecting blocks 15 can be inserted into the two limit rods 3 respectively, and the plate can be prevented from falling out of the fixed rod 3.

Referring to fig. 1 and 2, a self-tapping head 5 is arranged on the lower surface of a screw rod 3, a movable block 6 forms a telescopic structure with the screw rod 3 through a connecting rod 7, and a user positions and uses the screw through the self-tapping head 5 arranged on the screw rod 3 by means of a self-tapping tool; one side of each of the two limiting pipes 12 is connected with a reset spring 13 which is abutted against the connecting block 10, the reset springs 13 are sleeved on the outer wall of the limiting plug 15, and the limiting pipes 12 play a role in guiding, so that the round table blocks 8 respectively push the two connecting blocks 10 to horizontally move.

Referring to fig. 2 and 3, a limiting plate 14 is arranged on the outer surface of the connecting rod 7 and near the upper end inside the installation cavity 11, and the limiting plate 14 can prevent the connecting rod 7 from excessive movement; the outer wall of the screw rod 3 and the lower end close to the screw flat head 1 are provided with the anti-skid rings 16, the lower surfaces of the anti-skid rings 16 are equidistantly provided with a plurality of anti-skid convex points 17, and the anti-skid convex points 17 arranged on the lower surfaces of the anti-skid rings 16 can play a certain anti-skid role; the lower surface symmetry of screw flat head 1 is provided with two mounting 18, has seted up two spacing holes that correspond each other with mounting 18 on the antiskid circle 16, constitutes the lock structure through between mounting 18 and the screw flat head 1, inserts the spacing hole to the upper surface of antiskid circle 16 through mounting 18 to fix screw flat head 1, reduce the condition that takes place to drop.

The implementation principle of the utility model is as follows: before using the flat head terrace screw, a user installs the screw by means of a self-tapping tool through a self-tapping head 5 arranged on a screw rod 3, connects a hexagonal screwdriver head with an inner hexagonal hole 2 on the screw flat head 1, then vertically presses down the screwdriver head to drive a movable block 6 to move, so that a connecting rod 7 drives a round platform block 8 to move towards the bottom end in an installation cavity 11, and simultaneously drives a compression spring 9 to move and compress, and because the round platform block 8 is of a round platform structure, when the round platform block 8 moves, a connecting block 10 loses thrust, under the cooperation of a reset spring 13, the connecting block 10 is pushed to move, so that two connecting blocks 10 are mutually close to drive two limiting plugs 15 to move towards the installation cavity 11 respectively, and then a worker drives the screw to rotate through the self-tapping tool, so as to use, after the screw self-tapping arrangement is completed, the anti-skid ring 16 is contacted with the outer wall of the plate, due to the anti-skid convex points 17 arranged on the lower surface of the anti-skid ring 16, a certain anti-skid effect can be achieved, the arranged fixing piece 18 is inserted into the limit hole on the upper surface of the anti-skid ring 16, so that the flat head 1 of the screw is fixed, the falling situation is reduced, then a worker takes off the screwdriver head, the movable block 6 loses thrust, under the compression effect of the compression spring 9, the round table block 8 is driven to reset, the arranged limit plate 14 can prevent the connecting rod 7 from excessive movement, the round table block 8 respectively pushes the two connecting blocks 10 to horizontally move, the limit pipe 12 plays a limit role, the two limit plugs 15 respectively extend out of the fixing rod 4 to be inserted into the plate, so that the screw rod 3 is limited, and can effectually avoid screw pole 3 to take place the condition that drops.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (6)

1. The flat head terrace screw, its characterized in that includes:

Screw flat head (1), the vertical screw pole (3) that is fixed with of lower surface of screw flat head (1), the middle part of screw pole (3) is fixed with dead lever (4), interior hexagonal hole (2) have been seted up to the upper end of screw flat head (1), the inside sliding connection of interior hexagonal hole (2) has movable block (6), the lower surface fixation of movable block (6) has connecting rod (7), connecting rod (7) end is fixed with round platform piece (8), install chamber (11) have been seted up to the inside of dead lever (4), install chamber (11) inside lower extreme be provided with round platform piece (8) elastic connection's compression spring (9), the outer wall symmetry sliding butt of round platform piece (8) has two connecting blocks (10), two one side of connecting block (10) all is fixed with spacing plug (15), the inner wall symmetry of dead lever (4) is fixed with two spacing pipe (12), two spacing plug (15) are all overlapped to establish in the outer wall of spacing plug (15).

2. The flat head deck screw of claim 1, wherein: the lower surface of screw pole (3) is provided with self-tapping head (5), flexible structure is formed through connecting rod (7) and screw pole (3) between movable block (6).

3. The flat head deck screw of claim 1, wherein: one side of each limiting pipe (12) is connected with a reset spring (13) which is abutted against the connecting block (10), and the reset springs (13) are sleeved on the outer wall of the limiting plug (15).

4. The flat head deck screw of claim 1, wherein: the outer surface of the connecting rod (7) and the upper end close to the inside of the installation cavity (11) are provided with limiting plates (14).

5. The flat head deck screw of claim 1, wherein: the anti-slip screw is characterized in that an anti-slip ring (16) is arranged on the outer wall of the screw rod (3) and close to the lower end of the screw flat head (1), and a plurality of anti-slip protruding points (17) are arranged on the lower surface of the anti-slip ring (16) at equal intervals.

6. The flat head deck screw of claim 5, wherein: two fixing pieces (18) are symmetrically arranged on the lower surface of the screw flat head (1), and the anti-slip ring (16) and the screw flat head (1) form a buckling structure through the fixing pieces (18).