JPS6136972Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hinge mechanism between a front frame and a temple in an eyeglass frame.

The hinge mechanism between the front frame A and the hinge in a conventional eyeglass frame is such that two upper and lower shaft support arms D and E are fixed to the end of the front frame A through a gap C, as shown in Figure 6. A bearing arm is also provided at the end of the crane, and after inserting the bearing arm into the gap C, a screw that will become the shaft is passed through, and the screw hole is cut into the screw hole of the lower shaft support arm E. The thread on the tip of the screw was screwed into the groove, and the crane was attached to the front frame A so that it could rotate freely.
Since the screw thread is directly attached to the lower shaft support arm itself, the inner wall surface of the hole for the shaft support arm will tighten around the outer periphery of the screw every time you turn the screw when you put on or take off your glasses. The disadvantage was that the screws would gradually loosen when they came into contact with the surface, causing them to fall off and the truss to come off the front frame A.

In order to eliminate such conventional drawbacks, the present invention is designed so that the screw fitted to the shaft support arm does not rotate with respect to one shaft support arm, and the thread of the screw is threaded into the shaft support arm itself. This is a device that is designed to screw into a separate female screw with each shaft support arm without twisting, so that the screw will not loosen or fall off even if the shaft support arm of the temple rotates in contact with the screw. be.

An example of the implementation of the present invention will be described with reference to the drawings. 1 is a front frame, 2 is a shaft support part fixed to the end of the front frame 1, and an upper shaft support arm 2a and a lower shaft support are connected with a gap L in the vertical direction. An arm 2b is provided protrudingly, and a hole 2c for inserting a male screw with a diameter b slightly larger than the diameter a of a male screw 3 described later is bored in the upper shaft support arm 2a, and the upper inner peripheral edge of this hole 2c is An upper fitting part 2d into which the head 3a of the male screw 3 is fitted is formed in a hexagonal shape with a diameter c slightly larger than the diameter b of the hole 2c.
A hole 2e for inserting a female screw is formed in the lower shaft support arm 2b, and the diameter e is slightly larger than the outer diameter d of the female screw 4 that is screwed into the lower part of the male screw 3. A lower fitting portion 2f is formed with a slightly larger hole into which a protrusion 4b formed on the lower peripheral edge of the female thread 4 can be fitted. The head 3a of the male screw 3 is formed into a hexagonal shape that fits the upper fitting part 2d, and the lower part has a thread 3b.
to be engraved. The inner peripheral wall of the cylindrical female screw 4 is provided with a screw groove 4a that can be screwed into the thread 3b of the male screw 3.

Therefore, on the lower peripheral edge of the protruding edge 4b of the female thread 4,
A polygonal flange 4c is formed to prevent the female screw 4 from idling and to securely fasten the device when the male screw 3 is screwed into the female screw 4 using a device. 7 is female screw 4
It is a packing that is fitted with.

In addition, the upper fitting part 2d and the male screw 3 fitting thereto
In addition to the embodiment shown in FIG. 3, the planar shape of the head 3a may be square, pentagonal, octagonal, or other polygonal, or as shown in FIG. A protrusion 3c is formed over the outer circumferential surface, and an upper fitting part 2d having a shape that allows the protrusion 3c to fit is formed in the upper shaft support arm 2a, thereby preventing rotation of the male screw 3 with respect to the upper shaft support arm 2a. form the structure that will be used. In addition, in order to screw the male screw 3 into the female screw 4, in addition to the embodiment, a female screw fitting hole is formed by drilling the lower inside of the male screw 3, and a screw groove is carved in the inner peripheral wall. Then, the female screw 4 is formed to a thickness that can be fitted into the female screw fitting hole, and a thread is carved on the outer peripheral wall of the female screw 4,
The female thread 4 may be configured to be fitted into the male thread 3.

Since the present invention is configured as described above, the shaft support arm 6 of the temple 5 is inserted into the gap L between the upper and lower shaft support arms 2a, 2b, and the male screw 3 is inserted into the communicating holes 2c, 2e, 6a from above. is inserted to form a shaft, and the head 3a
is fitted into the upper fitting part 2d, and while the female screw 4 is fitted into the lower shaft support arm 2b, the screw groove 4a is inserted into the male screw 3.
The temple 5 is rotatably attached to the front frame 1 by being screwed and connected to the thread 3b of the front frame 1.

Therefore, according to the present invention, when both the upper and lower shaft support arms of the front frame and the shaft support arm of the temple are connected by inserting the shaft screws into their respective holes, the polygon formed in the hole of the upper shaft support arm Since the head of the screw formed in a polygonal shape is fitted into the fitting part of the screw, the screw itself does not rotate relative to the shaft support arm, and the screw can be directly screwed into the lower shaft support arm as in the conventional case. Because it is screwed into a female screw that is separate from the lower shaft support arm, even if the inner circumferential surface of the hole in the bearing arm slides into contact with the outer circumferential surface of the screw each time the temple is rotated, the screw will rotate and loosen. There is no problem, the temples do not come off from the front frame, and the temples are securely held against the front frame for a long time, allowing the glasses frame to be used stably.
The structure is simple and suitable as a hinge mechanism for eyeglass frames.

[Brief explanation of the drawing]

The figures show an example of the implementation of the present invention. Fig. 1 is an enlarged view of the assembled state of this mechanism as seen from the eyepiece side of the eyeglass frame, Fig. 2 is an exploded enlarged view of Fig. 1, and Fig. 3 4 is a plan view of the male screw, FIG. 4 is a plan view of the female screw, FIG. 5 is an enlarged perspective view of the male screw with a protrusion and the shaft support of the front frame, and FIG. 6 is an exploded perspective view of the conventional example. It is a diagram. DESCRIPTION OF SYMBOLS 1... Front frame, 2... Shaft support part, 2a... Upper shaft support arm, 2b... Lower shaft support arm, 2c... Hole, 2d... Upper fitting part, 2e... Hole, 2f... Lower fitting part, 3... Male Screw, 3a...Head, 3b...Thread, 3c...Protrusion, 4...
Female thread, 4a...Screwing groove, 4b...projection, 4c...flange, 5...vine, 6...bearing arm, 6a...hole, 7...packing, L...gap, a...diameter (male thread) b...bore (hole of upper shaft support arm), c...caliber (upper fitting part),
d...Outer diameter (female thread), e...Aperture (hole of lower support arm), A...front frame, B...vine, C...gap, D, H...
Upper and lower shaft support arms, H...bearing arms, T...screws, T...screw holes, R...threading grooves, N...threads.

Claims (1)

[Scope of utility model registration request] An upper shaft support arm 2a and a lower shaft support arm 2b are fixed to the end of the front frame 1 with a gap L between them, and a hole 2c for inserting a male screw 3 is bored in the upper shaft support arm 2a. An upper fitting part 2d is formed by drilling the periphery of the upper opening of 2c into a polygonal shape, and a hole 2e for inserting the female screw 4 is formed in the lower shaft support arm 2b and fixed to the end of the temple 5. A hole 6a for inserting the male screw 3 is bored in the bearing arm 6, the head 3a of the male screw 3 is formed into a polygon shape that matches the upper fitting part 2d, and a thread 3b is carved in the lower part. Furthermore, the thread 3 is provided on the inner circumferential wall of the cylindrical female thread 4.
A hinge mechanism between a front frame and a temple in an eyeglass frame, characterized in that a screw groove 4a that can be screwed into the eyeglass frame is formed.