JPH08323637A - Tightening tool for eyeglass screws and nuts - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent screws and nuts from co-rotating easily and securely, and also to prevent the tip of the driver bit from touching the lens or the fixture. In eyeglasses, a driver bit 31 that can be engaged with a head portion 11 of a screw 10, an insertion hole 35 that can be inserted into and engaged with a nut 14 at one end, and a dimension at the other end Of the guide member 33 having the fitting holes 36 corresponding to different nuts 14 of the different types, and the insertion hole 35 has a structure in which the distance between the opposite sides is at least slightly larger than the opposite side dimension of the nut 14 and the depth is equal to the length of the driver bit 31. [Effect] The tightening tool will not slip, the lens and fixture will not be scratched, and the lens will not break. Further, when the spectacles user repairs the looseness, even if the spectacles are removed, the work is easy, and further, since the different driver bits at both ends are engaged with each other freely, the screw head is +, -Even if it has a hexagonal shape, it can be easily dealt with.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw and a nut for fastening a lens to a fixture which constitutes a frame while preventing the screw and the nut from co-rotating in fastening the screw and the nut. Regarding tightening tools.

[0002]

2. Description of the Related Art In frameless glasses, which have been increasing in number of users recently, that is, frameless spectacles, resin washers are generally arranged on both sides of a lens surface, and a temple is openably and closably connected to one of the washers. The lens is attached by bringing the support portion of the fixture into contact with each other, and the leg portion of the screw is screwed into the nut through the washer, the lens, and the support portion to be integrally fixed. In this way, when the lens is fixed to the fixture or the screw or nut is loosened, the worker or user tightens the screw or nut with a screwdriver, etc. Since the nut causes the so-called co-rotation to rotate in the same manner, the screw and the nut cannot be firmly fastened to each other. In order to solve this, in reality, the nut is pinched and fixed with pliers or the like, and the screw screwed to the nut is turned by a screwdriver to be fixed.

[0003]

As described above, in the work of fixing the lens to the fixture of the spectacle frame, the screw head is supported by the driver, and the nut is supported by the pliers or the like to perform the mutual work. Therefore, if the driver or pliers slips due to some accidental operation and comes into contact with the lens or fixture,
This causes problems such as scratches on the lens and the fixture, and sometimes the lens breaks. Further, especially when a user of eyeglasses repairs looseness of a screw or a nut, since the eyeglass user removes the eyeglasses, there is a problem that the work is difficult to perform and scratches are likely to occur.

A first object of the present invention is to solve the above-mentioned problems and to prevent co-rotation during tightening work of a screw or nut easily and surely. A second object of the present invention is to provide a screwdriver. The tip of the bit should not touch the lens or fixture.

[0005]

SUMMARY OF THE INVENTION A first object of the present invention is to:
Attach the temple 4 that can be opened and closed freely to the fixture 5,
In a pair of spectacles in which the lens 1 is fixed with the screw 10 and the nut 14, the driver bit 31 having a tip shape engageable with the engaging groove 13 of the head portion 11 of the screw 10 at both ends, and the driver bit 31 inserted at one end And a guide member 33 made of resin which has an insertion hole 35 which is freely engageable with the nut 14 and has a fitting hole 36 having a dimension different from the distance between the opposite sides of the nut 14 at the other end. This is accomplished by providing a tightening tool for eyeglass screws and nuts.

A second object of the present invention is to insert the insertion hole 35 of the guide member 33 into the insertion hole 35 so that at least the distance between the opposite sides is slightly larger than the dimension of the opposite side and the depth thereof is equal to the length of the driver bit 31. It is achieved by doing.

[0007]

The screw 10 is inserted into the fixing hole 2 formed at a desired position of the lens 1 from one surface of the lens 1 with the leg portion 11 first. The support portion 6 of the fixture 5 is brought into contact with the other side, and the leg portion 11 of the screw 10 is inserted therethrough. A resin nut 14 containing a metal nut is screwed into the inserted leg portion 11 to fasten the screw 10 and the nut 14. This time,
A nut driver 20 made of resin having a driving hole 21 that fits into the driving surface of the nut 14 is fitted into the nut 14,
Then, the guide member 33 containing the driver bit 31 is pressed against the head 11 of the screw 10 to engage the tip of the driver bit 31 with the engagement groove 13 of the head 11. In this state, the guide member 33 is rotated and the other nut driver 2
By fixing 0, the screw 10 and the nut 14 are firmly fastened, and the lens 1 and the fixture 5 are integrally fixed.

In this way, when the screw 10 and the nut 14 are screwed together and the tightening work of the screw and the nut with a predetermined fastening force is completed, the leg portion 12 protrudes from the end surface of the nut 14 by a predetermined amount. It becomes a state. Then, spectacles are obtained by cutting the protruding leg portion 12 with a blade such as pliers at a position close to the end surface of the nut 14.

In addition, the screw 10 and the nut 1 are used while the spectacles are being used.
If 4 is loose, the user can
By preparing a guide member 33 incorporating the driver bit 31 and the screwdriver, and fitting the nut 14 and the screw 10 respectively and turning either one, the screw 10 and the nut 14 are retightened.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is a lens for spectacles. A fixing hole 2 is formed near the outer periphery of the lens 1, and a washer 3 made of resin or an elastic body having a hole on the same center line as the fixing hole 2 is arranged on both sides of the lens 1 so as to sandwich the lens 1. Has been done. The elastic body forming the washer 3 is silicon rubber, fluorosilicone rubber, fluororubber, butadiene rubber, chlorinated polyethylene rubber, or the like.

Also, one of these washers 3 has a temple 4
A flat support portion 6 formed on a fixture 5 that is openably and closably connected is in contact with one end of the support portion 6, and a support hole 7 similar to the fixing hole 2 of the lens 1 is also formed in this support portion 6. There is. The holes 1, 2 of the lens 1, washer 3 and supporting portion 6 are all on the same center line. The leg 12 of the screw 10 is inserted through these holes 2, 7 and the nut 14 is inserted into the leg 12. It is designed to be screwed and fixed.

Reference numeral 20 denotes a resin nut driver in which a drive hole 21 having a shape capable of fitting with the drive surface of the nut 14 is formed. The drive hole 21 has a cross section similar to the drive surface of the nut 14. It has a hexagonal shape. A guide hole 22 into which the leg portion 12 of the screw 10 can be loosely inserted is formed on the center line of the nut driver 20 in a predetermined length.

On the other hand, a tightening tool 30 composed of a guide member 33 having a driver bit 31 built therein is arranged on the opposite side of the nut driver 20 with the lens 1 interposed therebetween.
As shown in FIGS. 3 to 5, this tightening tool 30 has a curved surface 34 whose end surface has a substantially rectangular shape and whose wide portion is slightly curved in the center line direction. An insertion hole 3 having a hexagonal cross-section that can be fitted to the nut 14 and has a distance between opposite sides slightly larger than this opposite side dimension.
5 is composed of a guide member 33 formed to a predetermined depth and a driver bit 31 which can be inserted into the insertion hole 35 and engageable in the rotational direction. The insertion hole 3 is formed on the other end surface of the guide member 33 on the side opposite to the insertion hole 35.
A fitting hole 36 having a dimension of the opposite side slightly smaller than 5 is formed. The dimensions of the insertion hole 35 and the fitting hole 36 are different from each other in order to allow the two types of nuts 14 to be used in common.

A guide hole 37, which is long in the axial direction, is formed in one of the curved surfaces 34 of the guide member 33 at approximately the center in the longitudinal direction of the guide member 33.
It is possible to easily take out the driver bit 31 that is inserted in the No. 5 connector. Further, as shown in FIGS. 6 and 7, the head 1 of the screw 10 is attached to one end of the driver bit 31.
A cross-shaped engagement portion 32 corresponding to one engagement groove 13 is formed, and a one-shaped engagement portion 32 is formed on the other. The driver bit 31 has a shaft portion having a hexagonal cross section so that it can be engaged with the insertion hole 35 of the guide member 33 in the rotational direction. The tip of the insertion hole 35 projects when the driver bit 31 is inserted. It is formed to a depth that does not occur.

Therefore, as shown in FIG. 1, first, the lens 1 is sandwiched by the washer 3 with respect to the fixing hole 2 of the lens 1. After that, the support portion 6 of the fixture 5 is pressed against the end surface of the one washer 3 to align the fixing hole 2 and the support hole 7 of the support portion 6 on the same center line. Then, the screw 10 having the leg portion 12 of a predetermined length is inserted into the holes 2 and 7 with the leg portion 12 first. When the leg portion 12 is inserted, the tip of the leg portion 12 projects from the support portion 6, so the nut 14 is screwed into the leg portion 12. At this time, the nut 14 is held by the nut driver 20 on one side of the lens 1 so as to be fitted to the driving surface of the nut 14, and the tightening tool 30 is positioned on the other side so that the head 11 of the screw 10 is provided with the driver bit 31. When the tightening tool 30 is rotated with the engagement portion 32 engaged and the nut driver 20 fixed, the screw 10 and the nut 14 are firmly fastened, whereby the lens 1 and the fixture 5 are integrally fixed. .

After the lens 1 is thus fixed by the screw 10 and the nut 14, the leg portion 12 of the screw 10 protruding from the end surface of the nut 14 is fixed to the nut 14 with a blade (not shown) such as pliers. Cut from a position close to the end face. As a result, the legs 12 that are no longer needed are cut off, and spectacles with the lens 1 firmly fixed are obtained.

When the user of the eyeglasses loosens the screw 10 and the nut 14 while using them, the user uses the tightening tool 30 including the nut driver 20 and the guide member 33 containing the driver bit 31. The screw 10 and the nut 14 are retightened by preparing and fitting the nut 14 and the screw 10 respectively and turning one of them.

Further, FIG. 2 shows another embodiment of fixing the lens 1 and the fitting 5 using the present invention, in which the support portion 6 of the fitting 5 is provided on the nut 14 side. But,
Instead of this, the support portion 6 of the fixture 5 is arranged on the head 11 side of the screw 10, and the guide member 33 is brought into contact with the fixture 5 to tighten the screw 10 and the nut 14. In this case, the washer 3 is provided between the lens 1 and the support portion 6 of the fixture 5.
The resin-made nut side is tightened with the washer 3 removed, and the screw 10 and the nut 14 are tightened by the tightening tool 30 and the nut driver 20 in the same manner as in the above embodiment, and the lens is tightened. 1 and the fixture 5 are integrally fixed.

[0019]

According to the present invention, as is apparent from the above-described embodiments, the mount 5 is attached with the freely openable / closable temple 4,
In the spectacles in which the lens 1 is fixed to the fixture 5 with the screw 10 and the nut 14, the engaging groove 13 of the head 11 of the screw 10
Driver Bit 3 Having Tip Shapes at Both Ends Engageable with
1 and an insertion hole 35 into which the driver bit 31 can be inserted and engaged and can be fitted into the nut 14, and a fitting hole 36 having a size different from the distance between opposite sides of the nut 14 at the other end. The guide member 33 is made of resin, and the insertion hole 35 of the guide member 33 is slightly larger than this opposite side dimension so that at least the distance between the opposite sides fits the nut 14, and its depth becomes equal to the length of the driver bit 31. It is a tightening tool for spectacle screws and nuts configured as described above.

As described above, in the work of fixing the lens to the fixture of the spectacle frame, the head of the screw is tightened by the tightening tool which is constituted by the guide member that holds the nut by the nut driver and supports the driver bit so that the driver bit is inserted and engaged. Since they are engaged with each other by engaging the engaging grooves of the parts, the nut driver and tightening tool may slip and the lens and fixture may be scratched or the lens may be broken by some mistake. There will be nothing. In addition, when the spectacle user repairs the looseness of the screw or nut, the spectacle user removes the spectacle to perform the work, but since the nut and the screw are securely fitted to the nut driver and the tightening tool, the work is easy. And no scratches will occur. Further, since the driver bit having the different engaging portions at both ends is engaged with the guide member of the tightening tool so that the screwdriver head can be inserted and removed, the screw head can be easily engaged regardless of whether the engaging groove is + or-. It can be used, and even if the head of the screw is hexagonal, it can be easily handled by using either the insertion hole of the guide member or the fitting hole with different dimensions, etc. A unique effect can be obtained.

[Brief description of drawings]

FIG. 1 is an enlarged front view of a cross section of a main part showing an embodiment of a usage state of the present invention.

FIG. 2 is an enlarged front view of essential parts showing another embodiment of the use state of the present invention.

FIG. 3 is an external front view of the present invention.

FIG. 4 is a left side view of FIG.

FIG. 5 is a right side view of FIG.

6 is a partial cross-sectional plan view of FIG.

FIG. 7 is a sectional view taken along line AA of FIG. 6;

[Explanation of symbols]

 1 Lens 2 Fixing Hole 3 Washer 4 Crane 5 Mounting Tool 6 Supporting Part 7 Supporting Hole 10 Screw 11 Head 12 Leg 13 Engaging Groove 14 Nut 20 Nut Driver 21 Driving Hole 22 Guide Hole 30 Tightening Tool 31 Driver Bit 32 Engaging Part 33 Guide member 34 Curved surface 35 Insertion hole 36 Fitting hole 37 Guide hole

Claims (2)

[Claims] 1. A temple 4 which can be freely opened and closed is attached to a fixture 5,
In the spectacles in which the lens 1 is fixed to the fixture 5 with the screw 10 and the nut 14, a driver bit 31 having a tip shape capable of engaging with the engaging groove 13 of the head 11 of the screw 10 at both ends
And an insertion hole 35 into which the driver bit 31 can be inserted and engaged and which can be fitted into the nut 14, and a fitting hole 36 having a size different from the distance between the opposite sides of the nut 14 at the other end. A spectacle screw and nut tightening tool comprising a resin guide member 33. 2. The insertion hole of the guide member is characterized in that at least the distance between the opposite sides is slightly larger than the dimension of the opposite side so that the nut 14 fits into the nut 14, and the depth thereof is equal to the length of the driver bit 31. A tightening tool for the eyeglass screw and nut described.