JPH0740255A - Screw fastening tool for glasses - Google Patents

Abstract

PURPOSE:To provide a screw fastening tool having a high workability, by which an extremely small screw or an extremely small nut in glasses can be reliably fastened. CONSTITUTION:A plurality of screw fastening bits 2, 3, 4 are radially fixed or so implanted as to be replaced on the outer peripheral surface of a tool main body 1 formed into a ring shape. Thereby, the tool can be stably held because the tool main body 1 is formed into a ring shape, and the fastening precision is stabilized, and the workability becomes favorable, and work efficiency is improved. Moreover, the bit replacing-type screw fastening tool can easily comply with fastening of various kinds of screws or nuts by only replacing the bit by the required bit if various kinds of bits are prepared.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw tightening tool for spectacles used for tightening and removing a tiny screw and a tiny nut used in spectacles and the like.

[0002]

2. Description of the Related Art For example, temples and bridges of spectacles are tightened using a tiny screw and a tiny nut.
There is no suitable tool for assembling or disassembling with these tiny screws and tiny nuts.

[0003]

When tightening with the minimum screw and the minimum nut in this way, the screw and nut rotate together, so that either one must be pressed with a finger or the like for tightening. Moreover, this method has a problem that reliable tightening is difficult and a stable tightening torque cannot be guaranteed. Further, in order to securely tighten, the head of the tiny screw can be fixed with a driver bit and the tiny nut can be tightened, but there is a problem that workability is very poor and work efficiency is low. The present invention has been made with the object of solving these problems and providing a screw tightening tool which is capable of reliably tightening a minimum screw or a minimum nut in spectacles or the like and has good workability.

[0004]

To achieve this object, a screw fastening tool for eyeglasses in which a plurality of screw fastening bits are radially fixed or replaceably planted on the outer periphery of a tool body formed in a ring shape. Is.

[0005]

[Function] Supports by inserting the fingertip into the ring inner diameter of the tool body 1,
Insert the tiny nut into the box bit (3 or 4), apply it to the tightening position on the lower side of the work, insert the tiny screw from above the work, and tighten it with a screwdriver for the tiny screw to obtain the tiny screw and the tiny nut. Can be securely fastened to the work. It is also possible to use two of these screw fasteners for the holding side and the tightening side. As described above, since the screw fastener is ring-shaped, it can be fitted into a fingertip and stably held, and can be securely fastened even at a blind spot such as a back side of a work. Further, in the bit replacement type, if various kinds of bits are prepared, it is possible to easily cope with tightening of various kinds of screws and nuts simply by replacing the necessary bits.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described below with reference to the drawings. 1 and 2 show a screw fastener for glasses of the present invention. Reference numeral 1 in the figure is a tool body formed in a ring shape, and has a thick portion 1a.
The thickness of the thin portion 1b is slightly narrower than that of the thick portion 1a, and the inner diameter of the ring is ring-shaped so that a general operator's finger can be inserted. On the outer periphery of the thick portion 1a of the tool main body 1, there are radially provided positive (+) hole bits 2 which engage with the cross holes of the screw head. Box bits 3 and 4 engaging with the outer shape of the nut are radially fixed to the tool body 1 at a predetermined distance from the cross hole bit 2, respectively.
The box bits 3 and 4 are provided with engaging holes 3a and 4a of different sizes, and are formed so as to engage with the six corners of the nut. Box bit 3, in this embodiment,
In FIG. 4, the engaging holes 3a and 4a are provided with 12 grooves and peaks, but they may be hexagonal holes. In the embodiment, one cross hole bit 2 and one box bit 3 and 4 are used.
Although this is a configuration that is permanently installed, many other bits may be attached. Further, although the bits 2, 3 and 4 are fixed to the tool main body 1, respectively, the bits 2, 3 and 4 may be inserted into the tool main body 1 in a replaceable manner. In the case of the insertion type, the insertion portions 5, 6, and 7 may be formed in a non-rotatable shape such as a square hole and a square axis. In addition, a part of the thin portion 1b of the tool body 1 can be cut off so that it can be widely used by workers having different finger thicknesses.

[0007] This eyeglass screw fastener is an optimum tool for low torque tightening and removing work by using a minimum screw and a minimum nut used for temples and bridges of glasses. This screw tightening tool inserts a fingertip into the ring inner diameter of the tool body 1 to support it, inserts a tiny nut into the box bit (3 or 4), applies it to the tightening position on the lower side of the work, and from the top of the work By inserting and then giving up with a screwdriver for the extra-small screw, the extra-small screw and the ultra-small nut can be securely tightened to the work. In addition, when loosening and removing the screws, the work may be performed in the reverse order. Depending on the tightening position, the cross hole bit 2 may be applied to the screw head and the tiny nut may be tightened or loosened with a wrench for the tiny nut or the like. Further, two of these screw fasteners can be used for the holding side and the tightening side. As described above, since the screw fastener is ring-shaped, it can be fitted into a fingertip and stably held, and can be securely fastened even at a blind spot such as a back side of a work. Further, in the bit replacement type, if various kinds of bits are prepared, it is possible to easily cope with tightening of various screws and nuts simply by replacing the necessary bits.

[0008]

As is apparent from the above description, the present invention is
A screw fastening tool for spectacles in which a plurality of screw fastening bits are radially fixedly or replaceably implanted on the outer periphery of a tool body formed in a ring shape. According to the present invention, since the tool body has a ring shape, the tool can be stably held, the tightening accuracy is stable, and the workability is good and the work efficiency is improved. Further, in the bit replacement type, if various kinds of bits are prepared, it is possible to easily cope with tightening of various screws and nuts simply by replacing the necessary bits. Further, by forming a part of the thin portion of the tool main body 1 into a separated shape, many effects can be obtained, such as being widely usable by workers having different finger thicknesses.

[Brief description of drawings]

FIG. 1 is a front view of a screw fastener for eyeglasses of the present invention.

FIG. 2 is a plan view of FIG.

[Explanation of symbols]

 1 Tool main body 1a Thick part 1b Thin part 2 Cross hole bit 3, 4 Box bit 3a, 4a Engagement hole 5, 6, 7 Insertion part

Claims (2)

[Claims] 1. A screw fastening tool for spectacles in which a plurality of screw fastening bits are radially fixed to the outer periphery of a tool body formed in a ring shape. 2. An eyeglass screw fastener in which a plurality of screw fastening bits are radially and interchangeably planted on the outer periphery of a tool body formed in a ring shape.