TWM462308U - Improved structure of bolt - Google Patents

Description

Improved structure of bolts

This creation is about the improved structure of the bolt, especially a hand tool suitable for special fit, and its central recessed hole positioning and vertical two-step slip resistance are excellent bolt structures.

Most of the bolts or screws currently on the market are usually provided with a glyph or a cross-shaped groove on the head of one end, which can be used to extend and drive the opposite tool (a screwdriver or a cross screwdriver). Its rotation; such a bolt or screw structure with a word or a cross recess, due to its shape limitation, causes the in-line positioning and the one-word screwdriver to cooperate in the actual application, the center positioning is not good and the sliding is easy In the case of off-line, the general cross-shaped groove is mostly a tapered groove structure, so that the outer peripheral side is shallow and not easy to be subjected to force, and it is easy to cause slippage, etc., resulting in the word or the cross groove pole. It is easy to cause rupture and damage due to slippage. Therefore, the word and cross recess are only suitable for low and medium torque applications, forming an application defect.

There is also a structure in which a hexagonal recessed hole is provided in the head of the bolt. Since the hexagonal recessed hole is flat at the bottom, the combination of the general (size) and the hexagonal screwdriver or the wrench can produce a large Contact area to increase its force, so that it can be used for large torque applications; however, when it is applied to small-sized bolts, its hexagonal recesses and corresponding parts of related tools are extremely difficult to process ( The precision is extremely high, and the hexagonal recess is easily rounded due to wear. Therefore, the hexagonal recessed bolt has its application limitations.

In the "Mounting Structure Improvement" patent case of the Republic of China Patent No. M378988, it discloses another recessed hole structure suitable for a hexagonal screwdriver or a wrench on the top side of the head; it is also inevitable in application. The hexagonal recess is the same missing.

In the Republic of China Patent Announcement No. M351953, "Wood Screw Improvement Structure" In the case of the patent, it is disclosed that a circular hole is arranged on the top side of the head, and five radially extending rectangular grooves are arranged on the circumferential side of the circular hole, and in the "screw" patent case of the publication No. D101446 It discloses a structure in which five semi-circular arc grooves extending radially are arranged on the top side of a circular taper hole on the top side of the head; although the above two structures can solve the hexagon to some extent The recessed hole is not suitable for small-size machining, and the lack of torque of the one-word or cross-groove is insufficient, but in practical applications, the one-piece body can still protrude into the central circular hole and one of the rectangular grooves (or Inside the semi-circular groove, it is possible to drive the screw or bolt to rotate, which does not effectively prevent the use of non-dedicated tools to drive the screw or bolt, so it is difficult to meet some special purposes and functions (such as : Shells and assemblies that do not want the customer or user to open arbitrarily.

In view of the above-mentioned shortcomings of the concave hole (groove) structure on the top side of the head of the screw or bolt, the creator has researched and improved the shortcomings of these shortcomings, and finally this creation was produced.

The main purpose of the present work is to provide an improved structure of bolts that can limit the combination and drive of non-dedicated (appropriate) tools while effectively preventing illegal or improper disassembly behavior.

Another object of the present invention is to provide an improved structure of the bolt, which can provide excellent central positioning recessed holes and vertical two-step anti-skid characteristics, which makes the driving operation more convenient and smooth.

Another object of the present invention is to provide an improved structure of a bolt which can maintain a clear and complete shape when applied to a small-sized product, and as a whole, has a large contact force area by using a depth transition, and can provide Large drive torque.

In order to achieve the above object and effect, the technical means adopted by the present invention include: a body having an external thread at one side, and a head disposed at one end of the body and expanding outwardly on the outer peripheral side; The driving head is formed by a central recessed hole and a plurality of arcuate recesses disposed on the peripheral side of the central recessed hole, and each of the arcuate recesses is centrally disposed. The peripheral side of the recessed hole is convex outward and arranged adjacent to each other.

According to the above structure, the central recessed hole has a circular cross-sectional shape.

According to the above structure, each of the arcuate recesses has a semicircular cross-sectional shape.

According to the above structure, each of the arcuate recesses has the same shape as the central recessed hole Effective depth.

According to the above structure, the outer peripheral side of the central recessed hole is provided with five arcuate recesses.

According to the above structure, the bottom surface of the driving recess is further provided with a tapered surface.

As for the detailed structure, application principle, function and effect of this creation, you can get a complete understanding by referring to the following description according to the drawings:

1‧‧‧ Ontology

11‧‧‧ external thread

2‧‧‧ head

21‧‧‧ drive recess

211‧‧‧ central recess

212‧‧‧ curved recess

213‧‧‧Cone surface

3‧‧‧ Tools

The first picture is a schematic diagram of the three-dimensional structure of the present creation.

Figure 2 is a top plan view of the creation.

Figure 3 is a cross-sectional view of the A-A portion of Figure 2;

Referring to Figures 1 to 3, it can be seen that the structure of the present invention mainly includes: a body 1 and a head portion 2, wherein the outer periphery of the cylindrical body 1 is provided with an external thread 11, and the head 2 is attached to The body 1 is extended and protruded toward the outer peripheral side of the body 1. At the center of one side of the head 2 away from the body 1, a driving recess 21 is provided for the external tool to project into the joint.

In a possible embodiment, the driving recess 21 is defined by a central recess 211 (the central recess 211 can be a circular cross-sectional recess), and a plurality of recesses 211 are disposed in the central recess 211. The arcuate recess 212 is formed on the outer peripheral side and communicates with each other. Each of the arcuate recesses 212 may be a semi-circular cross-sectional recessed structure that communicates with the central recessed hole 211 and has the same effective recess depth, and each curved recessed portion The 212 is protruded outward on the circumferential side of the central recess 211 and arranged adjacent to each other.

In the actual application, the tool 3 can be inserted into the driving recess 21 by a tool 3. The end of the tool 3 has the same cross-sectional shape as the driving recess 21, and can be protruded from the bottom of the driving recess 21 at the top end. The matching tapered surface 213 allows the tool 3 to extend vertically into the driving recess 21 to abut the bottom tapered surface 213 to form a two-stage tight fit. The central recessed hole 211 can form the center of the tool 3 Positioning effect, at the same time, each arcuate recess 212 can form a large area of contact with the circumferential side of the tool 3, except that it can be larger In addition to the higher torque, the force is also prevented from slipping. Further, the arc-shaped recesses 212 (semi-circular cross-sectional shape) and the two side sides can respectively form an extension to the central recess 211. The arc, therefore, if an object with a shape mismatch protrudes into the arcuate recess 212 and exerts a force, the arcuate recess 212 can guide the object of the shape inconsistency to the central recess 211 to effectively prevent non-dedicated Or improper tool combination and drive slip effect.

In the above configuration of the present invention, the number of the arcuate recesses 212 of the driving recess 21 is not limited. However, when five arcuate recesses 212 are provided on the outer peripheral side of the central recess 211, the processing is performed. The most balanced benefit between difficulty and ease of operation.

As can be seen from the above, the improved structure of the inventive bolt does have the function of restricting the fit, the better center positioning and the vertical two-step slip resistance and the function of providing a large driving torque, and it has industrial applicability and novelty. And progressive and other patent requirements.

However, the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. That is, the equal changes and modifications made by the patent application scope of this creation are covered by the scope of the creation patent.

1‧‧‧ Ontology

11‧‧‧ external thread

2‧‧‧ head

21‧‧‧ drive recess

211‧‧‧ central recess

212‧‧‧ curved recess

3‧‧‧ Tools

Claims (6)

The improved structure of the bolt includes at least a body having an external thread on one side of the body, and a head disposed at one end of the body and extending outwardly from the outer peripheral side; wherein the head is located at a center away from one side of the body The driving concave portion is formed by a central recessed hole and a plurality of arcuate concave portions disposed on the circumferential side of the central concave hole, and each of the curved concave portions is outwardly protruded from the circumferential side of the central concave hole. And arranged next to each other. The improved structure of the bolt according to claim 1, wherein the central recess has a circular cross-sectional shape. The improved structure of the bolt according to claim 1, wherein each of the arcuate recesses has a semi-circular cross-sectional shape. The improved structure of the bolt of claim 1 or 2 or 3, wherein each of the arcuate recesses has the same effective depth as the central recess. The improved structure of the bolt according to claim 1 or 2 or 3, wherein the central recess is provided with five arcuate recesses on the outer peripheral side. The improved structure of the bolt according to claim 1 or 2 or 3, wherein the bottom surface of the driving recess is further provided with a tapered surface.