JP2002207198A - Temple joint structure of spectacle frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temple joint structure which foldably mounts the temples of spectacles, is extremely compact and is trouble-free because of the simple structure. SOLUTION: This structure has a bearing 6 at the front end of a wraparound endpiece and a shaft 7 formed with circular collars 8 and 8b is rotatably fitted into a shaft hole 9 of the bearing 6. A temple 4 is connected to the shaft 7. The temple 4 is made openable and closable along a slide groove 10 penetrated through the shaft hole 9 to an outer side. Guide pieces 11a and 11b forming the slide groove 10 partly have notched parts 12 of the size at which the temple 4 is inserted. A thrusting portion 14 is pressed to an outer peripheral surface 16 of the shaft portion 18 to energize spring force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for connecting a crane of an eyeglass frame so that the crane can be folded.

[0002]

2. Description of the Related Art The vine of a general glasses frame is foldably connected via a hinge. The yoroi is brazed to the outside of the rim on which the lens is fitted, and the two wings forming the hinge are brazed to the inner surfaces of the ends of the yoroi and the vine. Can be folded. However, the vine connected via a small hinge cannot sustain a stable folding operation indefinitely. That is, a small hinge loosens its shaft screw or wears the sliding surface, which causes the rattle to lose its stability, causing the worn glasses to shift or sometimes come off.

[0003] In addition, the hinge is small in size, and its manufacture is troublesome. Further, the hinge is in the most opened state in a straight line with the side piece of the yoroi, and has a joint structure which cannot be opened any more. Of course, if the glasses are merely put on the face, the opening degree of the vine is sufficient, and since the vine has some spring properties, it can be slightly curved to fit the face.

However, it is only for a short period of time after the purchase of the spectacles that the spectacles are fitted to the face only by the spring characteristics of the vine and that the worn spectacles do not shift. The spring characteristics of the crane itself are always constant depending on the material as long as it is not extremely bent and plastically deformed, and it is possible to return to the original shape if the force is removed, but as described above, the hinge connecting the crane to the hinge In order to cause backlash, in the conventional vine joint structure using only hinges, when any impact is applied to the front frame, there is no means to absorb the impact force, and the glasses fall off the face or the lens A situation may occur in which the frame itself is damaged or sometimes the frame itself is bent.

Incidentally, as one means for solving the problems of the eyeglass frame, a joint structure that allows the vine to be opened slightly more outwardly from the straight state with the side piece is desired. It is used. FIG. 7 shows a conventional example of this joint structure, which is called a spring hinge. That is, the basic idea of the spring hinge is
At (a), fix the fixed butterfly (b) and fix it, and use the other butterfly as a sliding butterfly (c) to allow sliding for a certain distance to open outward to the vine (d). Can be given.

A guide groove is formed in the vine (d), and the sliding butterfly (c) slides using the guide groove as a guide. A coil spring is provided in the internal cavity of the sliding butterfly (c). When (4) is settled and the vine (4) is opened outward, the sliding butterfly (3) is pulled toward the fixed butterfly (2) and compressed. The coil spring (e)
Corresponds to a claw (g) provided at the entrance of the inner cavity of the sliding butterfly (c) and locked in the slot (f) of the claw (d), and the claw (g) functions as a stopper. As a result, the coil spring
The restoring force of (e) acts on the vine (d) and attempts to return the vine (d) to its original position.

By the way, a coil spring is attached to the sliding butterfly piece (c).
The hinge structure incorporating (e) is complicated as shown in the figure, so that the number of manufacturing steps is increased, and the hinge with the spring is expensive in terms of cost. In addition, there is also a problem that the structure is complicated, and it is easy to break down, and once broken down, it is difficult to repair. If the coil spring (e) and the core metal are pushed into the internal cavity of the sliding butterfly piece (c) and locked with the claw (g),
(G) and coil spring (e) cannot be removed.
In other words, the tab (g) is restrained by the guide of the sliding butterfly (c), and the locking piece (h) of the claw (g) fits into the slot (f), and the head of the cored bar (f). Abuts the tab with spring force
The force for pushing (h) into the slot (f) will work. Therefore, the claw cannot be removed from the sliding butterfly piece C, and at the same time, repair cannot be performed.

[0008]

As described above, the conventional crane joint structure has the above-mentioned problems. The problem to be solved by the present invention is this problem, a crane joint structure for an eyeglass frame which is very compact and does not break down due to its simple structure. Provide a crane joint structure that can be disassembled.

[0009]

The torsion joint structure of the present invention comprises a bearing, a shaft which fits in a shaft hole of the bearing, and a pressing portion which comes into contact with the outer surface of the shaft. The bearing is generally ring-shaped, has a shaft hole vertically penetrating in the center, and a slide groove penetrating the shaft hole and the outside. The size of this slide groove is about 90 around the shaft hole.
And a part of the guide piece constituting the slide groove is cut off.

On the other hand, the shaft to be fitted in the shaft hole has a substantially cylindrical shape, and the upper and lower ends of the shaft have flanges with larger outer diameters. The inner diameter of the shaft hole is large enough to fit the collar and rotate. Made up of The bearing is attached to the tip of the yoke, and a hole opened in the inner peripheral surface of the shaft hole is provided toward the yoke. The pressing portion fits into this hole, and the spring is pushed out by a coil spring set at the bottom of the hole. Power is being energized.

[0011] Therefore, the pressing portion protrudes from the inner peripheral surface of the shaft hole and is pressed against the shaft portion so that it can be fitted between the upper and lower collars. As a result, the shaft does not come off the bearing. A crane is connected and extends from the shaft, and the crane is fitted in the slide groove and turns with the rotation of the shaft. Here, the swivel range of the vine is an area where a slide groove is formed, and has a range of about 90 ° so that the vine can be folded and opened and put on an ear.

The vine has a structure that can be attached to and detached from the shaft, so that a part of the guide piece forming the slide groove is cut out, and the vine extending from the shaft can pass through the cutout. It is large. By the way, in order for the crane joint structure of the present invention to have a function as a spring hinge, a flat surface is formed by notching the side surface of the shaft portion, and the pressing portion abuts on the flat surface with the crane open. To be configured.

Then, the size of the slide groove is slightly enlarged, and the slide groove is extended from the open state to the range where the vine can be pushed open. Then, when the crane is pushed open, the pressing portion which comes into contact with the flat surface of the shaft portion retreats by hitting the corner portion, and further compresses and deforms the coil spring to generate a torque for returning the shaft portion to rotate. Here, the bearing is not limited to the case where the bearing is provided at the tip of the yoke, and a bearing may be provided at the vine side and a shaft may be provided at the tip of the yoke. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

[0014]

FIG. 1 is a specific example showing the appearance of an eyeglass frame, in which both rims 1 and 1 are connected by a connecting member 2, and outer rims 3 and 3 are brazed to the outside of the rim.
A crane 4 is attached to the yoke 3 via a joint 5 so as to be foldable. The present invention relates to the structure of the joint portion 5 that allows the crane 4 to be stably folded, and the form of the eyeglass frame is not limited.

FIG. 2 shows an embodiment showing a crane joint structure according to the present invention. In FIG. 2, reference numeral 3 denotes a flap, 4 denotes a crane, and 5 denotes a joint. A bearing 6 is provided at the tip of the yoke, and the bearing 6 has a substantially ring shape. A shaft 7 is rotatably fitted in a shaft hole formed at the center, and a crane 4 is attached to the shaft 7. I have. Accordingly, the crane 4 can be pivoted about the axis 7 and can be folded.

FIG. 3 shows the crane 4 connected to the shaft 7. The shaft 7 is a column as shown in FIG. 3, and circular flanges 8a and 8b having larger outer diameters are formed at the upper and lower ends. It is a shaft with a break. Here, the connection form of the shaft 7 and the crane 4 is arbitrary, and it is also possible to connect by brazing, screwing, or press-fitting a pin protruding from the end of the crane into a hole formed on the side surface of the shaft 7. . And the shaft portion 1 is attached to the collar 8b.
8, a tapered surface 20 is formed toward the outer peripheral surface, and the bearing 6
The shaft 7 fitted in the shaft hole 9 can be removed.

FIG. 4 shows the bearing 6, and FIG.
(b) is a front view, (c) is a view on arrow A in (a). The bearing 6 has a ring shape penetrating the shaft hole 9 at the center, and a slide groove 10 penetrating from the shaft hole 9 to the outer periphery is provided in a part. Therefore, guide pieces 11a and 11b are formed above and below the slide groove 10, and the lower guide piece 11 is formed.
A part of b is cut out to have a notch 12. Further, a hole 13 is formed extending from the shaft hole 9 of the bearing 6 to the yoke side.

The shaft 7 shown in FIG. 3 fits in the shaft hole 9 of the bearing 6, but the crane 4 extending from the shaft 7 can pass through the notch 12. That is, the shaft 7 is fitted into the shaft hole 9 from below the bearing 6,
The pressing portion 14 is engaged with the flanges 8a and 8b of the shaft 7 so that the pressing portion 14 does not come off, and the pressing portion 14 contacts the shaft portion 18. Therefore, before the shaft 7 is fitted into the shaft hole 9, the coil spring 15 and the pressing portion 14 are housed in the hole 13 extending from the shaft hole 9 to the thread 3 as shown in FIG. However, collar 8b
Is formed with a tapered surface 20, so that if the crane 4 is pushed down while being positioned at the notch 12, the shaft 7 will come off the bearing 6.

The coil spring 15 and the pressing portion 1
4 is inserted from a slide groove 10 formed in the bearing 6, the pressing portion 14 pushed out toward the shaft hole 9 by the spring force of the coil spring 15 contacts the shaft portion outer peripheral surface 16 of the shaft 7, and Fit between 8a and 8b. Therefore,
The spring force of the coil spring 15 is constantly applied to the outer peripheral surface 16 of the shaft 7, and the shaft 7 rotates stably without rattling. As a result, the opening and closing operation of the vine 4 is also stabilized. That is, the shaft 8 is stabilized by applying a spring force to the shaft 8 so that the initial clearance between the shaft hole 9 and the shaft 8 and the clearance enlarged due to wear caused by the rotation of the shaft 8 do not rattle.

FIG. 5 shows another embodiment according to the present invention, in which the joint has a function as a spring hinge. The basic joint structure is the same as that shown in FIG. 2, and a shaft 17 is fitted in the bearing 6, and the crane 4 extends from the shaft 17. Circular collars 8a and 8b each having a size fitting into a shaft hole are formed above and below the shaft 17, and a shaft portion 1 between the upper and lower collars 8a and 8b is formed.
8 has flat contact surfaces 19a and 19b.

The contact surfaces 19a and 19b are perpendicular to each other, and the pressing portion 14 is in contact with the corresponding surfaces 19a and 19b. When the crane 4 is open, as shown in FIG. 5, the pressing portion 14 contacts the contact surface 19a, and when the crane 4 is folded, the pressing portion 14 contacts the contact surface 19b. . The pressing portion 14 abuts against the flat contact surfaces 19a and 19b to urge the spring force of the coil spring 15 so that the pressing force is applied.
Is more stable, and the crane 4 does not flutter in the folded state and the open state.

FIG. 6A shows a case where the crane 4 is folded, and the pressing portion 14 is in contact with the contact surface 19 b of the shaft portion 18. The vine 4 shown in (b) is a case where the vine 4 is slightly pushed outward from the open state, and the slide groove 10 formed in the bearing 6 is large, so that the vine 4 can be pushed open. As the crane 4 is pushed open, the shaft 17 rotates, the contact surface 19a is inclined, and the pressing portion 14 abuts on a corner.

As a result, the pressing portion 14 retreats and the coil spring 15 is further compressed. Coil spring 1
When the spring force P of No. 5 acts on the corner of the contact surface 19a, a counterclockwise moment is generated on the shaft 17, and a force for returning the crane 4 to the original position is exerted. That is, it can exhibit the same function as the conventional spring hinge. Here, since the assembling of the shaft 17 is the same as that in the above-described embodiment, the description is omitted.

The flanges 8a and 8b provided at the upper and lower ends of the shaft shown in FIG. 3 are circular, but the flange 8b is formed with a tapered surface 20 on the outer peripheral surface side of the shaft portion 18. The vine can be easily removed from the bearing. However, the method of removing the crane is not limited to this case, and a small hole reaching the pressing portion is formed in the yoke, and a jig is inserted into this hole to retreat the pressing portion 14 so that the flanges of the shafts 7 and 17 are removed. 8
Out of the way.

As described above, according to the crane joint structure of the present invention, the columnar shaft is fitted to the ring-shaped bearing, and the pressing portion, to which the spring force is applied, is pressed against the shaft, and the shaft is centered. The vine is connected so as to be foldable, and the following effects can be obtained.

[0026]

The crane joint structure of the present invention is constructed by fitting a shaft of a column to a substantially ring-shaped bearing, and furthermore, a pressing portion to which a spring force is applied is in contact with the shaft. By the clearance interposed between the shaft and the shaft hole of the bearing,
Also, the shaft does not rattle due to the increase in clearance due to contact wear. Therefore, the vine can always be stably opened and closed, and the worn glasses do not shift or come off.

The ring-shaped bearing is formed with a shaft hole and a slide groove penetrating the outside. The bending angle of the vine is regulated and the vine is folded at a predetermined position, and a predetermined opening degree is obtained. On the other hand, a cut-out portion is formed in a part of the guide serving as the slide groove, and the vine is attached and detached through this cut-out. Furthermore, while the size of the slide groove is slightly enlarged, a flat surface is formed on the shaft portion so that a function as a spring hinge can be provided that allows the vine to be slightly pushed outward from the open state. .

On the other hand, in the present invention, the pressing portion for pressing the shaft and the coil spring are accommodated in the hole formed from the shaft hole to the yoke, but the pressing portion and the coil spring are formed in the bearing. It can be assembled by inserting it into the hole from the slide groove and fitting the shaft into the shaft hole of the bearing. That is, the bearing is not brazed in a state in which the pressing portion and the coil spring are accommodated in the hole of the coil, so that the assembling work is very simple and the number of working steps is reduced.

[Brief description of the drawings]

FIG. 1 is an external view of an eyeglass frame.

FIG. 2 is an embodiment showing a crane joint structure of the present invention.

FIG. 3 is a shaft serving as a crane joint.

FIG. 4 shows a bearing that forms a crane joint.

FIG. 5 shows another embodiment of the crane joint structure of the present invention.

FIG. 6A shows a case where the vine is folded, and FIG. 6B shows a case where the vine is pushed open.

FIG. 7 shows a conventional spring hinge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rim 2 Connecting member 3 Yoroi 4 Crane 5 Joint part 6 Bearing 7 Shaft 8 Shaft 9 Shaft hole 10 Slide groove 11 Guide piece 12 Notch 13 Hole 14 Pressing part 15 Coil spring 16 Outer peripheral surface 17 Shaft 18 Shaft part 19 Contact surface 20 Tapered surface

Claims (4)

[Claims] 1. A crane joint structure in which eyeglasses are provided on both sides of a front portion of a pair of glasses and a crane is attached to the eyelets so that the crane can be folded. The formed shaft is rotatably fitted, and the vine is connected to the shaft and the vine can be opened and closed along the slide groove penetrating outward from the shaft hole, and a part of the guide piece forming the slide groove has It has a notch with a size that allows the crane to be inserted.A hole provided from the inner peripheral surface of the shaft hole to the yoke accommodates a coil spring and a pressing portion. The pressing portion applies a spring force to the outer peripheral surface of the shaft portion. The eyeglass frame crane joint structure characterized in that the eyeglass frame is abutted and locked at the upper and lower ends of a shaft. 2. A crane joint structure in which a pair of glasses are provided on both sides of a front portion of a pair of glasses and a crane is mounted on the pair of glasses so that the crane can be folded. The formed shaft is rotatably fitted, and the vine is connected to the shaft and the vine can be opened and closed along the slide groove penetrating outward from the shaft hole, and a part of the guide piece forming the slide groove has It has a notch with a size that allows the crane to be inserted.A hole provided from the inner peripheral surface of the shaft hole to the yoke accommodates a coil spring and a pressing portion. The pressing portion applies a spring force to the outer peripheral surface of the shaft portion. The shaft is provided with a flat surface on which the pressing portion abuts at the position where the crane is opened. Characterized by being slightly pushed open Glasses frame crane joint structure. 3. The crane joint structure for an eyeglass frame according to claim 1, wherein the collar provided on the shaft is tapered toward an outer peripheral surface of the shaft portion. 4. The eyeglass frame crane joint structure according to claim 1, wherein the shaft is provided at a tip of the yoke, the shaft is provided at a crane end, and the shaft is fitted and connected to the bearing. .