JP2001255497A - Temple joint structure of spectacle frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temple joint structure which has a function similar to like that of a spring hinge which can slightly push the temple of a spectacle frame to open from an opened state and is extremely simple in structure. SOLUTION: A wraparound endpiece side is provided with a stationary hinge piece 5 and the temple 3 is slidably mounted at a sliding hinge piece 6. A pair of magnets 12 and 13 are arranged in spaces 10 and 11 formed between the temple 3 and the sliding hinge piece 6. Both magnets 12 and 13 are directed to directions repulsing each other.

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 a crane of an eyeglass frame having a function similar to that of a conventional spring hinge by urging a repulsive force of a magnet.

[0002]

2. Description of the Related Art A general eyeglass frame crane 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, a vine connected via a small hinge cannot maintain a stable folding operation. That is, a small hinge loosens its shaft screw or wears a sliding surface, and as a result, the stability of the vine is impaired, and the worn glasses are displaced or come off.

Also, 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.

[0004] However, it is only for a short period of time after purchasing the spectacles that the user fits the face only with the spring characteristics of the vine and does not rattle the spectacles. 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, the conventional vine joint structure using only hinges has no means to absorb the impact force when any impact is applied to the front frame, 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. 5 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, so that it is easily broken, and once broken, 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 spring-loaded hinge has the above-mentioned problems. The problem to be solved by the present invention is this problem, and it is an object of the present invention to provide an eyeglass frame crane joint structure which is very compact and does not fail due to its simple structure.

[0009]

The crane joint structure of the present invention has the same operation and effect as the conventional spring hinge.
No coil spring is used as a component. In the present invention, a pair of permanent magnets is used in place of the coil spring which is a component of the conventional spring hinge, and an elastic force can be applied to the vine using the repulsive force of this magnet. The hinge consists of a fixed butterfly and a sliding butterfly as in the past, the fixed butterfly is brazed on the yolo side, the sliding butterfly is provided on the vine side, and the vine is a sliding butterfly. It is attached so that it can slide along the guide. Sometimes it is possible to reverse the positional relationship between the fixed butterfly and the sliding butterfly.

The magnet is housed in a space formed between the sliding butterfly and the vine, and the two magnets are arranged so as to exert a repulsive force on each other. The rear end of one magnet contacts the rear end surface of the space formed in the sliding butterfly, and the other magnet rear end is positioned in contact with the rear end surface of the space formed in the vine. Since the two magnets repel each other, the rear end abuts on the rear end surface of the space without any gap, and when the gap between the opposing surfaces is reduced, the repulsive force is further increased.

Therefore, when folding the crane, the two magnets do not move in the gap between the opposing surfaces as they are, and the sliding butterfly rotates about the connecting shaft with the fixed butterfly, and slides. The vine attached to the moving butterfly piece also turns and folds at the same time. When the vine is opened, the tip surface of the lip and the vine end surface come into contact with each other, but the vine can be slightly pushed outward in the same manner as in the case of the conventional spring hinge.

In this case, the crane pivots with the joint surface between the tip end surface of the yoke and the crane end surface serving as a base point, and as a result, the magnet fitted on the rear end surface of the space on the side of the sliding butterfly is fitted together with the sliding butterfly. Approaching the magnet that fits in the space on the vine side. Since the repulsive force between the two magnets is further increased, a restoring force for returning the crane to the original position is generated.

The method of arranging the pair of magnets is not limited to the case where the magnets repel each other, but they may be arranged in a direction in which they attract each other. A magnet is fixed to the sliding butterfly and the vine, respectively, and abuts each other.In the case of pushing open, the two magnets are separated by sliding between the sliding butterfly and the vine, and the attractive force of both magnets is reduced. It can be used to give the crane a restoring force. However, a stopper is provided to prevent the crane from pushing and opening beyond the range where the attracting force of both magnets does not become zero. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

[0014]

1 shows an eyeglass frame provided with a crane joint structure of the present invention, and FIG. 2 is an enlarged cross-sectional view of a portion A in FIG. On the outside of the front frame 1,
2 is brazed, and yoroi 2,2 are crane 3,3
Are mounted so that they can be folded through hinges 4 and 4. The crane 3 can not only be folded, but also can be slightly pushed outward from the state shown in FIG. 1. When the crane 3 is pushed open, a restoring force is generated to return the crane 3 to its original position.

As shown in FIG. 2, the hinge 4 of the present invention has a hinge 4 comprising a fixed butterfly 5 brazed to the yoke 2 and a sliding butterfly 6 attached to the crane 3. 6
Are connected by a shaft screw 7 and can bend each other.
The crane 3 is folded by bending the sliding butterfly 6. The figure shows a state in which the crane 3 is opened, and the end face 8 of the crane 3 hits the tip end face 9 of the crook, and the degree of opening of the crane 3 is temporarily restricted.

The crane 3 of the present invention has a structure which can be slightly pushed outward from the state shown in FIG. The crane 3 is not brazed to the sliding butterfly 6, and the crane 3 is fitted on the guide formed on the sliding butterfly 6, as shown in FIG. , Can slide. A space 10 is formed at the end of the vine, and a space 11 is also formed in the sliding butterfly 6.

The spaces 10 and 11 are continuous, and magnets 12 and 13 are accommodated therein. The magnets 12 and 13 have a right triangular shape and act on each other to exert repulsive forces. FIG. 3 shows repulsive forces P, P acting between the slopes of the two magnets 12, 13, and the repulsive force P is divided into a horizontal component L and a vertical component H, and the horizontal component L is a space component. 10,
The rear ends of the magnets 12 and 13 are in contact with the rear end surfaces 14 and 15 by acting on the rear end surfaces 14 and 15 of the magnet 11. One vertical component H acts on the bottom surfaces 16 and 17 of the spaces 10 and 11,
The bottoms of the magnets 12 and 13 are in contact with these bottoms 16 and 17.

That is, the two magnets 12 and 13 facing each other are repelled, so that the magnets 12 and 13 are correctly positioned by hitting the corners of the spaces 10 and 11. The end of the vine is formed as a space 10 with an open inside, and legs 18 and 18 provided on a sliding hinge 6 are fitted and guided in grooves formed in the longitudinal direction of the space, and the vine 3 slides. It does not come off unless it is pulled out from butterfly 6. The space 11 of the sliding butterfly 6 is made up of the two legs 18,1.
8 are formed.

By the way, the magnets 12 and 13 housed in the spaces 10 and 11 repel each other and move away from each other. However, a stopper 19 is provided at the tip of the sliding butterfly 6 so as to hit the end face of the space of the vine. Positioned. Therefore crane 3
When the is folded, the magnets 12 and 13 rotate together with the vine 3 and the sliding butterfly 6 in a state of being kept as it is.

FIG. 4 shows a case where the crane 3 is slightly pushed outward from the state of FIG. The end surface 8 of the vine abuts against the tip of the crook, and the vine 3 pivots from this contact point. In this case, the sliding butterfly 6 also pivots together with the vine 3, and at the same time, the vine 3 moves in the distal direction (left in FIG. Direction)
The gap between the two magnets 12, 13 becomes smaller. A gap 20 is formed between the stopper 19 of the sliding butterfly 6 and the space 10.
Is formed.

Therefore, the crane 3 which has been pushed open outward has a moment to return to the original position by the repulsive force of the magnets 12 and 13, and has the same action as the conventional spring hinge. Here, the magnets 12, 1 housed in the spaces 10, 11
Reference numeral 3 is not limited to a right triangle as shown in the embodiment, but is attached to the vine side and the sliding butterfly piece side in directions repelling each other.

FIG. 5 shows another embodiment of the present invention, in which both magnets 21 and 22 are arranged so as to attract each other. The magnet 21 is fixed to the sliding butterfly 6, the one magnet 22 is fixed to the vine 3, and both magnets abut each other. And if the crane 3 is pushed open, the butted magnets 21 and 22 will separate. However, since the pulling force is generated, the crane 3 generates a restoring force for returning to the original position.

A stopper 23 is attached to the sliding butterfly 6, and the stopper 23 moves along a guide groove 24 formed in the vine 3. The moving distance of the stopper 23 is the length of the guide groove 24. Is limited to the range. That is, the length of the guide groove 24 is set such that the guide groove 24 can move within a range in which the attractive force of the two magnets 21 and 22 exists. As described above, the crane joint structure of the present invention arranges a magnet between the crane and the sliding butterfly, and applies a repulsive force acting between the two magnets, or a restoring force to the crane which is pushed open by using the attraction force. The following effects can be obtained.

[0024]

According to the crane joint structure of the present invention, the two magnets are arranged in a space formed on the crane side and the sliding butterfly piece side in a direction in which the magnets repel each other. It can be pushed open, in which case the vine is returned to its original position by the action of the repulsive forces of both magnets. That is, the same action as the conventional spring hinge can be performed by utilizing the repulsive force of the magnet. The present invention has a very simple structure in which both magnets are arranged in the space formed on the vine side and the sliding butterfly piece side, does not cause a failure, and the manufacturing cost is very low. Similarly, by arranging a pair of magnets attracting each other between the vine and the sliding butterfly piece, the same operation and effect as the spring hinge can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view of an eyeglass frame.

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

FIG. 3 shows a repulsive force acting between both magnets.

FIG. 4 shows a case where the vine is pushed outward.

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

FIG. 6 shows a conventional spring hinge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front frame 2 Scraper 3 Crane 4 Hinge 5 Fixed butterfly 6 Sliding butterfly 7 Shaft screw 8 End face 9 Tip face 10 Space 11 Space 12 Magnet 13 Magnet 14 Rear end face 15 Rear end face 16 Bottom 17 Bottom 18 Leg 19 Stopper 20 Gap 21 Magnet 22 Magnet 23 Stopper 24 Guide groove

Claims (4)

[Claims] In a joint structure of a crane, which can be slightly pushed outwardly from an open state of the crane, a fixed butterfly is provided on the side of the crook, and the crane is slidably attached to the sliding butterfly. A pair of magnets is disposed in a space formed between the vine and the sliding butterfly, and the two magnets are oriented in directions repelling each other. 2. The crane joint structure for an eyeglass frame according to claim 1, wherein the shape of the magnet is a right-angled triangle, and the oblique sides are arranged as opposing surfaces. 3. In a joint structure of a crane, which can be slightly pushed outward from the open state of the crane, a fixed butterfly is provided on the yolo side, and the crane is slidably attached to the sliding butterfly. A crane joint structure for an eyeglass frame, wherein a magnet is attached to the crane and the sliding butterfly so as to be attracted to each other, and a stopper for regulating the degree of opening of the crane is provided. 4. The fixed butterfly on the vine side, and a sliding butterfly attached to the yoke.
The crane joint structure of the eyeglass frame described in the above.