JPH0890434A - screwdriver - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a screw driver whose tip does not come off from the slot, particularly a screw driver suitable for an adjusting screw. A screw driver having a guide socket 3 having a screw head insertion portion 4 into which at least a part of a screw head can be inserted.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a screw driver, and more particularly to an adjust screw driver.

[0002]

2. Description of the Related Art When assembling, disassembling, servicing or experimenting an engine or other various machines, it is often necessary to adjust a screw, for example, an adjusting screw (adjusting screw). At that time, when a general-purpose minus screwdriver is used, the tip of the screwdriver is likely to come off from the slit groove of the adjusting screw head. In particular, if you want to rotate the screwdriver quickly, or if you want to rotate it many times in succession, it is easy to come off and work efficiency is poor. There is also a drawback in that the object to be fastened or the object to be adjusted may be damaged and must be replaced by the detachment.

[0003]

[Object] An object of the present invention is to provide a screw driver whose tip does not come off from the slot groove, particularly a screw driver suitable for an adjusting screw.

[0004]

The present invention relates to a screw driver having a guide socket into which at least a part of a screw head can be inserted. The screwdriver of the present invention will be specifically described with reference to FIGS. As shown in FIG. 1, the screw driver 1 is characterized by having a guide socket 3 in which an insertion portion 4 of the screw head is formed at the tip of a shaft 2. The screwdriver itself that adds the guide socket 3 is
Any conventionally known type can be used. As shown in FIG. 2, the guide socket 3 has such a shape that at least a part of the screw head can be inserted into the tip portion. Since the screw driver of the present invention has a structure in which the guide socket having the above-mentioned structure is added to the tip portion thereof, it does not slip off in the screw head slotting direction. A screw driver is often used to adjust the adjusting screw (adjusting screw) when assembling, disassembling, maintaining, or experimenting with an engine or other various machines.
When the screw driver of the present invention is used for the work of rotating the adjusting screw, the screw driver can be quickly rotated, or even when the screw driver is continuously rotated many times,
The tip of the driver does not come off from the slit in the head of the adjusting screw. When the screw is used in a place where lubricating oil is used, the adjusting screw of an automobile engine, for example, tends to slip due to the lubricating oil, but the screw driver of the present invention does not cause slipping as described above.

The guide socket 3 has a ratio of 2 ≧ inner diameter of guide socket / outer diameter of screw head>
1, and more preferably, one satisfying the requirement of 1.5 ≧ guide socket inner diameter / screw head outer diameter ratio ≧ 1.1. If the ratio of inner diameter of guide socket / outer diameter of screw head exceeds 2, it is too large,
Also, if it does not exceed 1, it is useless. The guide socket portion 3 of the present invention is formed integrally with the shaft portion 2 of the screw driver 1 or, as described below, is attached to the shaft portion 2 of the screw driver 1 by a suitable means such as an angular drive detaching and attaching means. A fitting fixing means may be separately provided. For example, at least a part of the screw head can be inserted into the tip portion, and the square drive having the steel ball 6 shown in FIG. 3 formed on the shaft portion of the screw driver on the inner surface of the other end is provided. It is possible to squeeze in by means of the above, etc.), and the guide socket 3 is engaged with the angular drive engaging part. Good. By using the guide socket portion having such a structure, it is possible to use it for various screws having different head sizes only by exchanging the guide socket portion. Furthermore, in this case, various types of screwdriver shafts are used, for example, shafts having different lengths are used, and the guide socket part and the screwdriver part are appropriately combined to provide a screw suitable for each use point. You can get a driver.

[0006]

According to the present invention, there is provided a screw driver whose tip does not come off from the slot groove, particularly a screw driver suitable for an adjusting screw.

[Brief description of drawings]

FIG. 1 is a perspective view of an example of a screw driver of the present invention.

FIG. 2 is an enlarged view of a guide socket portion of the screw driver of the present invention.

FIG. 3 shows an engaging means that may be formed at the tip of the shaft portion of the screw driver of the present invention,
(A) is a plan view and (b) is a side view.

[Explanation of symbols]

 1 Screwdriver 2 Screwdriver shaft 3 Guide socket 4 Screw head insertion part 5 Square drive 6 Steel ball

Claims (4)

[Claims] 1. A screwdriver (hereinafter, referred to as a screwdriver) having a guide socket into which at least a part of a head of a screw (hereinafter, referred to as a screw) can be inserted at a tip portion. 2. The screw driver according to claim 1, wherein the ratio of 2 ≧ inner diameter of guide socket / outer diameter of screw head>
1 is a screwdriver. 3. The screw driver according to claim 1, further comprising a guide socket that prevents the tip of the screw driver from coming off from the screw head when the screw driver is rotated, and the guide socket is the tip of the screw driver shaft portion. A screwdriver that has a structure that can be attached and detached to and that has a part at the tip of the screwdriver for engaging with the screw head slot. 4. A screw driver in which the screw driver according to claim 1, 2 or 3 is for an adjusting screw driver.