JP2002228988A - Temple joint structure and hinge of spectacle frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temple joint structure for mounting the temples of spectacles in a foldable manner which is extremely compact and simple in the structure and is therefore trouble-free. SOLUTION: The front end of a wraparound endpiece is provided with a bearing 6 and a shaft 7 is rotatably fitted into a shaft hole 8 of the bearing 6. The temple 4 is connected to the shaft 7 to make the temple 4 openable and closable along a guide groove 11 penetrated into the shaft hole 8 from its outer side. An inverted taper pin made larger on the front end side is fitted into a central hole 20 of the shaft 7 and is attached to the bearing 6. Further, a thrusting section 18 is adapted to abut on an outer peripheral surface 19 of the shaft 7 to impart spring force to the shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure and a hinge for connecting a crane of an eyeglass frame so as to be foldable.

[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. 8 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 and a hinge of an eyeglass frame which is very compact and rarely breaks down due to its simple structure. Provides an easily disassembled crane joint structure and hinges.

[0009]

According to the present invention, there is provided a crane joint structure comprising a bearing, a shaft which fits in a shaft hole of the bearing, a pin which fits in a center hole of the shaft and connects the bearing and the shaft, and a shaft having an outer surface. It consists of a contacting pressing part. The bearing has a shaft hole in the center and a slide groove passing through the shaft hole and the outside. The size of this slide groove is formed within a range of about 90 ° about the shaft hole, and the vine extending from the shaft is guided and folded.

On the other hand, the shaft that fits into the shaft hole has a substantially ring shape and passes through a center hole into which a pin fits at the center. The pin has a head on its upper part, and the pin mounted on the bearing is connected through a center hole of the shaft. The bearing is provided at the tip of the yoke, and a hole opened on the inner peripheral surface of the shaft hole is provided toward the yoke. A spring force is applied.

Therefore, the pressing portion is pressed from the inner peripheral surface of the shaft hole to the outer peripheral surface of the shaft. As a result, the shaft is stably mounted without rattling due to the spring force constantly applied from the pressing portion. 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 (size) in which a slide groove is formed, and is about 90 ° so that the vine can be folded and opened and put on an ear.

The vine is structured so as to be detachable together with the shaft, and the shaft is removed from the slide groove by extracting a pin inserted into the center hole of the shaft. Here, since the pin has an inverted taper with a slightly thicker tip side, the pin inserted through the center hole of the shaft does not come out alone. On the other hand, in order to provide the crane joint structure of the present invention with a function as a spring hinge, a side surface of the shaft is cut out to form a flat contact surface, 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 opened state to a range in which the slide can be slightly pushed open. At the same time that the crane is pushed open, the pressing portion which is in contact with the contact surface of the shaft retreats by hitting the corner, and a torque is generated to rotate the shaft back to further compress and deform the coil spring. 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.

On the other hand, the crane joint structure of the present invention can be constituted as independent hinges having the same structure. That is, one butterfly has a pressing portion with a built-in bearing and a coil spring, and the other butterfly has a shaft and is configured to be rotatable. Are connected so that they can be folded. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

[0015]

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 is an embodiment showing the crane joint structure of the present invention. In FIG. 2, numeral 3 indicates a yoke, numeral 4 indicates a crane, and numeral 5 indicates a joint portion. 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 8 formed at the center, and a crane 4 extends from the shaft 7. ing. Accordingly, the crane 4 can be pivoted about the axis 7 and can be folded.

FIG. 3 shows a state in which the yoke 3 and the vine 4 are separated, that is, a state before the vine 4 is connected to the bearing 6 provided at the tip of the yoke. The bearing 6 provided at the tip of the yoke has a shaft hole 8 at the center.
And the seat 10 are formed concentrically. The bearing 6 has a substantially ring shape having a shaft hole 8, and a slide groove 11 penetrating from the shaft hole 8 to the outside is provided in a part thereof in a range of a size θ ₁ . Therefore, guide pieces 12a and 12b are formed above and below the slide groove 11, and the shaft 7 of the tool 4 is
And the arm 14 connecting the shaft 7 and the crane 4 is a
It can be turned by being guided by 2a and 12b.

The shaft 7 has a ring shape as shown in the drawing, and the arm 14 is extended from the vine 4 to form the shaft 7 at the tip.
The thickness of the arm 14 is the same as that of the shaft 7. Then, the shaft 7 is inserted from the slide groove 11 and fits in the shaft hole 8, and as shown in FIG.
And connected. The pin 15 has a slightly tapered inverted taper. The stepped head 16 fits in the seat 10 and the shaft hole 8 formed in the bearing 6, and the pin tip fits in the pin hole 9. Accordingly, the vine 4 can be turned around the shaft 7 along the slide groove 11 so that it can be folded.

Before the shaft 7 is fitted into the shaft hole 8, the hole 13 extending from the slide groove 11 through the shaft hole 9 to the yoke 3 has a coil spring 17 and a pressing portion 18 as shown in FIG. Is housed. The pressing portion 18 pushed in the direction of the shaft hole 8 by the spring force of the coil spring 17 contacts the outer peripheral surface 19 of the shaft 7, and the spring force of the coil spring 15 is constantly urged on the outer peripheral surface 19, Rotates stably without rattling, and as a result, the opening and closing operation of the crane 4 is also stabilized.

That is, the shaft 7 is stabilized by applying a spring force to the shaft 7 so as not to rattle due to the initial clearance between the shaft hole 8 and the shaft 7 and the clearance enlarged due to wear caused by the rotation of the shaft 7. The pin 15 is inserted through the center hole 20 of the shaft 7 fitted in the shaft hole 8, but the pin 15 does not come out by itself because it has an inverted taper and has a thicker tip side. That is, the spring force acting on the pin 15 by the pressing portion 18 has a component force in the direction in which the pin 15 is pushed.

FIG. 4 shows another embodiment according to the present invention, in which the joint portion has a function as a spring hinge. The basic joint structure is the same as that shown in FIG. 2, and a shaft 21 is fitted in the bearing 6, and the crane 4 extends from the shaft 21. The shaft 21 has a center hole 20 in which the pin 15 fits, but is not a ring but has flat contact surfaces 22a and 22b formed outside the ring.

The contact surfaces 22a and 22b are perpendicular to each other, and the pressing portion 18 is in contact with the corresponding surfaces 22a and 22b. When the crane 4 is open, as shown in FIG. 4, the pressing portion 18 contacts the contact surface 22a, and when the crane 4 is folded, the pressing portion 18 contacts the contact surface 22b. . The pressing portion 18 comes into contact with the flat contact surfaces 22a and 22b to urge the spring force of the coil spring 17 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. 5A shows a case where the crane 4 is folded, and the pressing portion 18 is in contact with the contact surface 22 b of the shaft 21. The crane 4 shown in (b) is a case where it is slightly pushed outward from the open state, and the size θ ₂ of the slide groove 11 formed in the bearing 6 is θ ₁ shown in FIG.
It is slightly larger and can open the crane 4 open. As the crane 4 is pushed open, the shaft 21 rotates,
The contact surface 22a is inclined, and the pressing portion 18 abuts on the corner.

As a result, the pressing portion 18 retreats and the coil spring 17 is further compressed. Coil spring 1
When the spring force P of 7 acts on the corner of the contact surface 22a, a counterclockwise moment is generated on the shaft 21, and a force for returning the crane 4 to its original position acts. That is, it can exhibit the same function as the conventional spring hinge. Here, since the assembling of the shaft 21 is the same as that of the above embodiment, the description is omitted.

Here, the crane joint structure of the present invention has a bearing 6
The shafts 7 and 21 are fitted into the shaft hole 8 of the shaft, and the pin 1 is inserted into the center hole 20 of the shaft.
5 is inserted. Since the pin 15 has an inverted tapered shape with a thicker tip side, the pin 15 does not come out alone by the pressing force applied from the pressing portion 18. Then, when removing the crane 4, the pin 15 is removed.

FIG. 6 is an embodiment showing the hinge of the present invention. The basic structure is the same as the crane joint structure shown in FIG. 2, but this embodiment is applied to a hinge on which the crane can be folded. The hinges are hinge pieces 23 and 24
The butterfly 2 is inserted into the shaft hole of the bearing 6 provided in the butterfly 23.
The shaft 7 provided at 4 is fitted and connected by a pin 15. On the butterfly piece 23 side, there is a pressing portion 18 to which the spring force of the coil spring 17 has acted. The pressing portion 18 is in contact with the outer peripheral surface of the shaft 7 to eliminate looseness of the shaft 7.

A slide groove 11 penetrating from the shaft hole 8 to the outer periphery is formed in the bearing 6 similarly to the above-described embodiment, and the butterfly piece 24 can turn along the slide groove 11.
Thus, if the butterfly 23 is brazed to the yoro side and one butterfly 24 is brazed to the vine, the vine pivots with the butterfly 24 and is folded.

Further, as another form of the hinge, a spring hinge shown in FIG. 4 can be used. FIG. 7 shows an embodiment in which a spring hinge is formed. In this spring hinge, contact surfaces 22a and 22b are formed on a shaft 21 on the hinge piece 24 side. Therefore, when the crane is opened, the pressing portion 18 abuts on the contact surface 22a, and when the crane is folded, the contact surface 22a is pressed.
b. When the vine is further pushed slightly open from the open state, the shaft 21 rotates and the pressing portion 18 hits the corner to retract and functions as a spring hinge by the action of the spring force of the coil spring 17.

As described above, in the crane joint structure and hinge of the present invention, the shaft is fitted into the shaft hole of the bearing, the pin is inserted into the center hole of the shaft, and the shaft is pressed by a spring force. The abutment is abutted, and the vine is connected so as to be foldable about the axis, and the following effects can be obtained.

[0030]

The crane joint structure and hinge of the present invention are constructed by fitting a shaft into a shaft hole of a bearing and inserting a pin, and the shaft is in contact with a pressing portion to which a spring force is applied. In addition, the shaft does not rattle due to the clearance interposed between the shaft and the shaft hole of the bearing, and the clearance is increased 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 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. By slightly expanding the size of the slide groove and forming a flat contact surface on the shaft, it is possible to provide a function as a spring hinge that allows the vine to be pushed open slightly 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 housed 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, since the bearing is not brazed in a state where the pressing portion and the coil spring are accommodated in the hole of the coil, 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 perspective view of a yoro and a crane that form a crane joint structure.

FIG. 4 is another embodiment showing the crane joint structure of the present invention.

FIG. 5 (a) shows the case where the vine is folded, and FIG. 5 (b) shows the case where the vine is pushed open.

FIG. 6 is an embodiment showing a hinge according to the present invention.

FIG. 7 shows another embodiment of the hinge according to the present invention.

FIG. 8 shows a conventional spring hinge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rim 2 Connecting member 3 Yoroi 4 Crane 5 Joint 6 Bearing 7 Shaft 8 Shaft hole 9 Pin hole 10 Seat 11 Slide groove 12 Guide piece 13 Hole 14 Arm 15 Pin 16 Stepped head 17 Coil spring 18 Pressing part 19 Outer peripheral surface 20 Center hole 21 Axis 22 Contact surface 23 Butterfly piece 24 Butterfly piece

Claims (5)

[Claims] 1. A crane joint structure in which a yoke is provided on both sides of a front portion of spectacles and a crane is mounted on the yoke so that a crane can be folded. At the same time, a pin with a thicker tip side is inserted into the center hole of the shaft so as to reach a pin hole provided in communication with the shaft hole, and a slide groove is extended through the shaft to penetrate outward from the shaft hole. The vine can be opened and closed along.The hole provided from the inner peripheral surface of the shaft hole to the yoke accommodates a coil spring and a pressing portion, and the pressing portion applies a spring force to the outer peripheral surface of the shaft. The crane joint structure of the eyeglass frame, which is in contact. 2. A crane joint structure in which eyeglasses are provided on both sides of a front portion of a pair of eyeglasses and a crane is attached to the eyeglasses so that the crane can be folded. At the same time, a pin having a thicker tip end is inserted into the center hole of the shaft so as to reach a pin hole provided in communication with the shaft hole, and a slide is extended through the shaft to penetrate outward from the shaft hole. The vine can be opened and closed along the groove, and the hole provided from the inner peripheral surface of the shaft hole to the yoke accommodates the coil spring and the pressing part,
The pressing portion abuts on the outer surface of the shaft by applying a spring force,
Furthermore, a flat contact surface is formed on the outside of the shaft so that the pressing portion comes into contact with the crane in an open state, and the size of the slide groove is slightly enlarged so that the crane can be pushed open. The crane joint structure of the eyeglass frame. 3. The eyeglass frame crane joint structure according to claim 1, wherein the shaft is provided at the tip of the yoke, the shaft is provided at the crane end, and the shaft is fitted to and connected to the shaft. 4. A hinge for mounting a pair of spectacles so as to be able to be folded, wherein one of the butterfly pieces is provided with a bearing, and a ring-shaped shaft is fitted into a shaft hole of the bearing, and a tip end is inserted into a center hole of the shaft. Insert the thickened pin so as to reach the pin hole provided in communication with the shaft hole, extend another butterfly on the shaft, and slide the other butterfly along the slide groove penetrating outward from the shaft hole. It can be opened and closed, and a coil spring and a pressing portion are accommodated in a hole provided from the inner peripheral surface of the shaft hole to one butterfly piece, and the pressing portion applies a spring force to the outer peripheral surface of the shaft to abut. The hinge of the eyeglass frame, which has been done. 5. A hinge for mounting a pair of spectacles so as to be able to fold, wherein one of the butterfly pieces is provided with a bearing, a substantially ring-shaped shaft is fitted into a shaft hole of the bearing, and a center hole of the shaft has a tip side. Is inserted through the pin hole so as to reach the pin hole provided in communication with the shaft hole, and another butterfly is extended on the shaft, and the other butterfly is extended along a slide groove penetrating outward from the shaft hole. Can be opened and closed, and a coil spring and a pressing portion are accommodated in a hole provided from the inner peripheral surface of the shaft hole to one of the butterfly pieces, and the pressing portion applies a spring force to the outer surface of the shaft to apply the force. A flat contact surface is formed on the outer side of the shaft so that the pressing portion comes into contact with the crane in a state where the crane is open, and the size of the slide groove is slightly enlarged so that the crane can be pushed open. The hinge of the eyeglass frame, characterized by: