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CN-224229051-U - Improved self-tapping screw

CN224229051UCN 224229051 UCN224229051 UCN 224229051UCN-224229051-U

Abstract

The utility model discloses an improved self-tapping screw, which belongs to the technical field of hardware parts and comprises a self-tapping screw body, a cross groove formed in the top end of the self-tapping screw body, and an annular boss fixedly arranged on the side surface of the self-tapping screw body, wherein the cross groove is formed in the top end of the self-tapping screw body; through the cooperation between each device above, through the setting of shutoff mechanism, when needs screw in the object with self-tapping screw body inside, carry out reverse rotation with rotatory top ring and swivel ring, drive connecting rod synchronous revolution, make connecting rod and closure plate cooperation, rotate the closure plate to the position that does not shelter from the cross recess, at this moment, tool such as usable screwdriver card goes into the cross recess, rotatory self-tapping screw body, make its screw in object inside smoothly, after the self-tapping screw body installation is accomplished, reverse rotation top ring and swivel ring again, make the closure plate change to the position that shelters from the cross recess, with reduce impurity and rainwater entering recess, thereby reduce the degree of difficulty of dismantling the self-tapping screw body.

Inventors

  • LIN XIUPING
  • TANG YONGMING
  • CHEN WENQIANG

Assignees

  • 泉州集协五金有限公司

Dates

Publication Date
20260512
Application Date
20250813

Claims (6)

  1. 1. The improved self-tapping screw is characterized by comprising a self-tapping screw body (1), a cross groove (2) formed in the top end of the self-tapping screw body (1), an annular boss (8) fixedly arranged on the side surface of the self-tapping screw body (1), a rotary groove (3) formed in the annular boss (8) and a plugging mechanism arranged in the rotary groove (3) and used for plugging the cross groove (2); the plugging mechanism comprises a rotary ring (4) arranged in the rotary groove (3), a connecting rod (5) arranged on the rotary ring (4) in a rotary mode, a top ring (7) arranged above the rotary ring (4) and a plugging plate (6) arranged at the bottom of the top ring (7) in a rotary mode, and one end, away from the rotary ring (4), of the connecting rod (5) is connected with one side of the plugging plate (6) in a rotary mode.
  2. 2. The improved self-tapping screw as claimed in claim 1, wherein a plurality of connecting rods (5) are arranged, the connecting rods (5) are distributed on the rotary ring (4) in an annular array, a plurality of blocking plates (6) are arranged, and the blocking plates (6) are distributed on the bottom of the top ring (7) in an annular array.
  3. 3. The improved self-tapping screw as claimed in claim 1, wherein the side surface of the self-tapping screw body (1) is provided with a mounting groove (9), the inner wall of one side of the mounting groove (9) is fixedly connected with a telescopic rod (10), and the movable end of the telescopic rod (10) is fixedly connected with a spring head (11).
  4. 4. The improved self-tapping screw as claimed in claim 3, wherein a spring (12) is sleeved on the side surface of the telescopic rod (10), one end of the spring (12) is fixedly connected to the inner wall of one side of the mounting groove (9), and the other end of the spring (12) is fixedly connected to one side of the spring head (11).
  5. 5. The improved self-tapping screw as claimed in claim 1, wherein the bottom end of the self-tapping screw body (1) is fixedly connected with a spiral tail wing (13), and the side surface of the self-tapping screw body (1) is fixedly connected with a self-tapping thread (14).
  6. 6. The improved self-tapping screw as claimed in claim 5, wherein the bottom of the annular boss (8) is fixedly connected with a plurality of anti-skid bumps (15), and the anti-skid bumps (15) are distributed in an annular array at the bottom of the annular boss (8).

Description

Improved self-tapping screw Technical Field The utility model relates to the technical field of hardware parts, in particular to an improved self-tapping screw. Background The existing screw is a tool for fastening the machine parts step by utilizing the physical and mathematical principles of the inclined circular rotation and friction force of the object. The screw is an indispensable industrial necessity in daily life, such as a very small screw used for cameras, glasses, watches, electronics, etc., a general screw for televisions, electric products, musical instruments, furniture, etc., and a large screw, nut, or a large screw for engineering, construction, and bridge, or a large screw for transportation, aircraft, electric car, automobile, etc., and the like. Screws are an important task in industry, and as long as industry exists on earth, the function of the screw is always important. Screws are a common invention in production and life of people for thousands of years, and are the first invention of human beings according to the application field. Through investigation, the utility model patent discloses an improved self-tapping screw (publication number: CN 209324827U), which comprises a screw head and a screw rod, wherein self-tapping threads are arranged at the lower end of the screw rod, and a flange plate is arranged between the screw head and the screw rod. In the above-mentioned patent, through setting up the ring flange between screw head and screw pole, the ring flange can play direction and locate action, and the screw catch mechanism of automatic lock screw machine can accurately catch self-tapping screw and make its screw pole's orientation preset position through the ring flange, but when outdoor use, the hexagonal plum blossom inslot at its top ponds easily, leads to corroding, and impurity probably infiltration inslot, in case hexagonal plum blossom inslot is impaired, dismantles self-tapping screw and will face great difficulty. Accordingly, the present utility model provides an improved self-tapping screw to solve the above-mentioned problems. Disclosure of utility model The utility model provides an improved self-tapping screw, which aims to solve the problems in the background technology. In order to achieve the purpose, the improved self-tapping screw comprises a self-tapping screw body, a cross groove formed in the top end of the self-tapping screw body, an annular boss fixedly arranged on the side surface of the self-tapping screw body, a rotary groove formed in the annular boss, and a plugging mechanism arranged in the rotary groove and used for plugging the cross groove. The plugging mechanism comprises a rotating ring arranged in the rotating groove in a rotating way, a connecting rod arranged on the rotating ring in a rotating way, a top ring arranged above the rotating ring and a plugging plate arranged at the bottom of the top ring in a rotating way, wherein one end, away from the rotating ring, of the connecting rod is rotationally connected with one side of the plugging plate. As a preferable technical scheme of the application, a plurality of connecting rods are arranged, the connecting rods are distributed on the rotating ring in an annular array, a plurality of blocking plates are arranged, and the blocking plates are distributed on the bottom of the top ring in an annular array. As an optimized technical scheme of the self-tapping screw, the side surface of the self-tapping screw body is provided with the mounting groove, the inner wall of one side of the mounting groove is fixedly connected with the telescopic rod, and the movable end of the telescopic rod is fixedly connected with the elastic pressing head. As a preferable technical scheme of the application, a spring is sleeved on the side surface of the telescopic rod, one end of the spring is fixedly connected to the inner wall of one side of the mounting groove, and the other end of the spring is fixedly connected to one side of the elastic pressing head. As an optimal technical scheme of the self-tapping screw, the bottom end of the self-tapping screw body is fixedly connected with a spiral tail wing, and the side surface of the self-tapping screw body is fixedly connected with self-tapping threads. As a preferable technical scheme of the application, the bottom of the annular boss is fixedly connected with a plurality of anti-skid lugs, and the anti-skid lugs are distributed in an annular array at the bottom of the annular boss. The self-tapping screw is simple in structure and convenient to use, and through the arrangement of the plugging mechanism, when the self-tapping screw body is required to be screwed into an object, the rotary top ring and the rotary ring are reversely rotated to drive the connecting rod to synchronously rotate, so that the connecting rod is matched with the plugging plate, the plugging plate is rotated to a position where the cross groove is not blocked, at the moment, tools such as