Square head screw

Abstract

The utility model discloses a square head screw which comprises a stud portion, one end of the stud portion is provided with a square head, four arc holes are distributed on the periphery of the square head, one end of each arc hole is connected with a transition hole, the end, not connected with the arc holes, of each transition hole is communicated with the outside, and an outer clamping piece integrated with the square head is formed between each transition hole and the corresponding arc hole connected with the transition hole. Four first adjusting holes which vertically penetrate through the square head and have equal adjacent interval included angles and four second adjusting holes which vertically penetrate through the square head and have equal adjacent interval included angles are distributed on the periphery of the square head, the diameter of the second adjusting holes is larger than that of the first adjusting holes, and the second adjusting holes are arranged close to the transition holes; the square head is rotationally connected with an adjusting wafer which is coaxial with the stud part, and four adjusting columns which are inserted into the second adjusting holes respectively are distributed on the periphery of the adjusting wafer. The square head screw has the advantages of being capable of preventing looseness and safe and reliable to use, complete in overall function and high in practicability.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and more specifically, to a square head screw. Background Technology

[0002] Square head screws have a variety of uses and are suitable for various industries and fields. In the furniture industry, square head screws are used in furniture connectors such as children's beds, bunk beds, and bunk beds where rotation and loosening need to be prevented. However, because it is difficult to perfectly match the pre-drilled square holes on the furniture with the rotating part of the square head screw, a gap is left between them, which can cause loosening after assembly, resulting in low safety and poor overall performance. Therefore, this utility model proposes a square head screw. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a square head screw that is anti-loosening and safe and reliable in use.

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows: This utility model relates to a square head screw, comprising a stud portion, one end of which is provided with a square head in the shape of a regular square prism. The square head has four arc-shaped holes arranged in a circular array at equal intervals around the axis of the stud portion. The arc-shaped holes penetrate vertically along the axial direction of the stud portion and also extend circumferentially around the axis of the stud portion. One end of each arc-shaped hole is connected to a transition hole. The end of the transition hole not connected to the arc-shaped hole communicates with the outside. The transition hole and the connected arc-shaped hole... An outer clip is formed between the wire holes and the square head. The square head has four first adjustment holes that penetrate vertically through the square head and have equal adjacent angles, and four second adjustment holes that penetrate vertically through the square head and have equal adjacent angles. The diameter of the second adjustment holes is larger than the diameter of the first adjustment holes. The second adjustment holes are arranged close to the transition holes. An adjustment disc is rotatably connected to the square head and is arranged on the same axis as the stud part. The adjustment disc has four adjustment pins that are inserted into one of the second adjustment holes. The diameter of the adjustment pins is equal to the diameter of the second adjustment hole.

[0005] The present invention is further configured such that a rotating structure is provided in the center of the adjusting disc.

[0006] The present invention is further configured such that the turning structure is a turning hole formed on the adjusting disc and is in the shape of a non-rotating column.

[0007] The present invention is further configured such that the turning structure is a turning column disposed on the adjusting disc and is in the shape of a non-rotating column.

[0008] The present invention is further configured such that: the outer end face of the outer clip is provided with anti-slip tooth groove.

[0009] In summary, this utility model has the following beneficial effects: The square head screw involved in this utility model first completes the screw screwing, then the furniture board with pre-drilled square holes is placed on the square head of the screw, and finally the adjusting disc is rotated using a wrench until all the outer clips change shape, so that the square head screw and the furniture board form a tight connection effect, preventing loosening, safe and reliable use, with complete overall function and strong practicality. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0011] Figure 2 This is a partial structural schematic diagram of the present invention. Detailed Implementation

[0012] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of this utility model, and not for limiting the patent claims of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0013] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0014] Example 1

[0015] See Figure 1 and Figure 2As shown, this embodiment involves a square head screw, including a stud portion 1. One end of the stud portion 1 is provided with a square head 2 in the shape of a regular square prism. The square head 2 has four arc-shaped holes 3 arranged in a circular array at equal intervals around the axis of the stud portion. The arc-shaped holes 3 penetrate vertically along the axial direction of the stud portion 1 and extend circumferentially around the axis of the stud portion. One end of each arc-shaped hole 3 is connected to a transition hole 4. The end of the transition hole 4 not connected to the arc-shaped holes 3 communicates with the outside. The transition hole 4 and the connected arc-shaped holes 3 form a connection with the square head. The outer clamp 5 is an integral piece. The square head 2 has four first adjustment holes 6 that penetrate the square head vertically and are spaced at equal angles to each other, and four second adjustment holes 7 that penetrate the square head vertically and are spaced at equal angles to each other. The diameter of the second adjustment holes 7 is larger than the diameter of the first adjustment holes 6. The second adjustment holes 7 are arranged close to the transition hole 4. An adjustment disc 8 is rotatably connected to the square head 2 and is arranged on the same axis as the stud part. The adjustment disc 8 has four adjustment pins 9 that are inserted into one of the second adjustment holes. The diameter of the adjustment pins 9 is equal to the diameter of the second adjustment hole 7.

[0016] Furthermore, the center of the adjusting disc 8 is provided with a turning structure, which is a turning hole 10 that is opened on the adjusting disc 8 and is in the shape of a non-rotating column.

[0017] In this implementation scheme, firstly, the adjusting post 9 is located inside the first adjusting hole 6, and the outer clamping piece 5 is not deformed and does not protrude from the outer side of the square head 2. After the square head screw is screwed on, the furniture board with the pre-drilled square hole is placed on the square head of the screw. Then, the turning tool is taken out and the adjusting disc 8 is driven to rotate relative to the square head 2 until the adjusting post 9 moves from the first adjusting hole 6 into the second adjusting hole 7, causing the outer clamping piece 5 to deform to an outward expansion state, so that the outer clamping piece 5 is tightly attached to the wall of the pre-drilled square hole in the furniture board. Finally, the turning tool is removed.

[0018] Example 2

[0019] See Figure 1 and Figure 2 As shown, the square head screw involved in this embodiment is further configured, based on embodiment 1, with anti-slip tooth groove 11 provided on the outer end face of the outer clamp 5.

[0020] In this embodiment, the anti-slip groove 11 is provided to increase friction and provide anti-slip effect.

[0021] The square head screw involved in this utility model first completes the screw screwing, then the furniture board with pre-drilled square holes is put on the square head of the screw, and finally the adjusting disc is rotated by a wrench until all the outer clips change shape, so that the square head screw and the furniture board form a tight connection effect, preventing loosening, safe and reliable use, with complete overall functions and strong practicality.

[0022] Unless otherwise specified, in this utility model, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the actual orientation or positional relationship shown. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the embodiments and according to the specific circumstances.

[0023] Unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A square head screw, comprising a stud portion, one end of which is provided with a square head in the shape of a regular square prism, characterized in that: The square head has four arc-shaped holes arranged in a circular array at equal intervals around the axis of the stud portion. The arc-shaped holes extend vertically through the stud portion along its axial direction and also extend circumferentially around the axis of the stud portion. One end of each arc-shaped hole is connected to a transition hole, and the end of the transition hole not connected to the arc-shaped hole is open to the outside. The transition hole and the arc-shaped hole connected to it form an outer clamping piece integrated with the square head. The square head has four first adjustment holes that extend vertically through the square head and have equal adjacent angles, and four second adjustment holes that extend vertically through the square head and have equal adjacent angles. The diameter of the second adjustment holes is larger than that of the first adjustment holes. The second adjustment holes are arranged close to the transition holes. An adjustment disc is rotatably connected to the square head and is arranged coaxially with the stud portion. The adjustment disc has four adjustment posts that are each inserted into one of the second adjustment holes. The diameter of the adjustment posts is equal to the diameter of the second adjustment hole.

2. The square head screw according to claim 1, characterized in that: The center of the adjusting disc has a lever mechanism.

3. The square head screw according to claim 2, characterized in that: The turning structure is a turning hole formed on the adjusting disc and is in the shape of a non-rotating column.

4. The square head screw according to claim 2, characterized in that: The rotating structure is a rotating column that is mounted on the adjusting disc and is in the shape of a non-rotating column.

5. The square head screw according to any one of claims 1-4, characterized in that: The outer end face of the outer clip is provided with anti-slip grooves.

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