JPH0472207B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a temple joint structure in an eyeglass frame.

(Prior Art) The temple of the eyeglass frame is attached so that it can be opened and closed, and generally, the opening and closing is performed via a hinge as shown in FIG. The truss is brazed to the butterfly piece RO 1 of the hinge RO, and the other butterfly piece is brazed to the end piece fixed to the rim that fixes the lens, and the tsui moves only in the direction of the arrow shown in the figure. , no further opening movements are allowed. Of course, this degree of opening of the temples is sufficient to simply hang the glasses on the face, and since the temples have some springiness, they can curve slightly to fit the glasses on the face. However, the spring properties of the temples alone will ensure that the glasses you are wearing will not wobble after a short period of time after purchase, and the spring properties of the temples themselves will only last for a short period of time unless you bend them to the extreme and deform them plastically.
Depending on the material it is made of, it is always constant and can return to its original shape when the force is removed, but the screws on the hinges connecting the temples may loosen, causing play. In addition, with the conventional temple joint structure that uses only hinges, when an external impact force is applied to the front frame, there is no means to absorb the impact force, causing the glasses to fall off the face or damaging the lenses. In some cases, bending the frame itself can also cause cracks. By the way, as a means of solving such problems with eyeglass frames, a joint structure that allows the temple to open slightly outward from the straight line with the endpiece is desired, and is used in some cases. The eighth example shows a conventional example of this joint structure.
It is a diagram. That is, the basic concept of the joint structure is to fix the fixed butterfly piece c to the endpiece a by brazing, and to allow the other butterfly piece to slide a certain distance as the sliding butterfly piece d, as indicated by the dotted line. As shown, it is possible to give the vine b an outward opening. A guide e is fixed to the inner surface of the crane b, and the sliding butterfly piece d slides using the guide e as a guide. Inside the sliding butterfly piece d is a coil spring (not shown). The length is adjusted so that when the temple b is opened outward, it is compressed, and the restoring force of the coil spring returns the opened temple b to its original position.

By the way, since such a conventional joint structure incorporates a coil spring inside, the thickness H becomes large, and the length L also becomes long, so that a slim eyeglass frame cannot be obtained. In other words, to obtain a coil spring with a certain degree of restoring force, the coil diameter must be at least 1 mm, and if a coil spring is formed using the 1 mm coil diameter, the spring diameter will be at least 3 mm.
The size becomes mm. If the sliding butterfly piece d and the guide e are formed by incorporating a coil spring having a coil diameter of such a size, the thickness H will be reduced at least.
is several mm or more. In addition, as shown in the figure, such a conventional joint structure has a large number of parts, and each part requires dimensional accuracy and may be processed by cutting, which increases the number of manufacturing steps and reduces costs. Not only is it quite expensive, but it is also heavy. On the other hand, since it has a highly precise sliding surface, if sweat adheres to it and corrodes, the sliding surface will become inoperable and the crane will no longer be able to perform its joint function.

(Objectives of the Invention) The conventional temple joint structure in which the temple can be opened more than a predetermined angle as described above has the above-mentioned problems. The present invention was developed to solve these problems, and provides a joint structure that is smaller, lighter, and has fewer parts.

(Structure of the present invention) In order to solve the above-mentioned problems, the spectacle temple joint structure according to the present invention is constructed with the following features. That is, the joint structure basically needs to have a restoring force for returning the opened temple to its original position (regular opening degree), and a magnet is used as the restoring force. One butterfly piece that forms the hinge is brazed to the endpiece, and the magnet is fixed to the other butterfly piece. Another magnet that attracts the magnet and each other is fixed to the temple side, and the attractive force of both magnets is It is constructed so that it slides within a distance range where it acts. However, even when the two magnets are closest, they do not come into contact with each other.
A slight gap is provided, and a guide is formed so that the butterfly piece and the temple slide together with the magnet.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a temple joint structure for eyeglass frames according to the present invention will be described in detail based on the drawings.

(Example) Fig. 1 shows one form of an eyeglass frame having a temple joint structure according to the present invention, in which 1 is a rim, 2 is a bridge, 3 is a nose pad, 4 is an endpiece, 5 is a temple, and 6 is a Showing the hinge. Here, the rim 1 has a V-groove formed on its inner periphery, and the lens 7 is fixedly attached through the V-groove, and is brazed symmetrically with respect to the bridge 2. Further, nose pads 3, 3 for supporting the front frame portion with the nose are attached to the rim 1, and end pieces 4 are brazed to both sides of the front frame. Furthermore, the crane 5 will be connected to the armor 4,
The temple 5 can be opened and closed via the hinge. The structure of these eyeglass frames is not unique in any way compared to conventional ones, but it is characterized by the joint structure including the hinge 6, and the temple 5 shown in the figure.
It has a structure that allows it to be opened further outward. FIG. 2 shows a specific form of the joint structure, in which one butterfly piece 8 of the hinge 6 is fixed to the endpiece 4 by brazing, and the other butterfly piece 9 is brazed to the temple 5. The crane 5 is restrained by guide pieces 10, 10 formed at the upper and lower ends of the temple 5 so as to be able to slide freely. The guide pieces 10, 10 are the upper surface 1 of the butterfly piece 9.
1 and the lower surface 12, but on the contrary, the butterfly piece 9
The same effect can be obtained even if a guide piece is formed on the top and bottom of the crane 5 to restrain the upper and lower surfaces of the crane 5. Therefore, the butterfly piece 9 must be restrained and slid between it and the temple 5, and is formed to have a certain length, and a magnet 14 is fixed to the inner surface 13 with a fastener such as a screw 15. has been done. On the other hand, a hinge case 16 is formed on the crane 5, and the magnet 14
The butterfly piece 9 to which is fixed is covered by the hinge case 16, and a magnet 18 is also fixed to the inner surface 17. Here, the means for fixing the magnets 14 and 18 does not matter. There is a slight gap _Δ1 between the magnet 14 and the magnet 18, and they are not in close contact with each other. Although the gap Δ ₂ between the magnet 14 and the inner surface 17 of the hinge case 16 is very small, they are in contact with each other, and the magnet 18 and the inner surface 13 of the butterfly piece are in contact with each other.
The relationship between the two is also the same, and it serves as a guide surface to prevent wobbling in the horizontal direction.

Fig. 4 shows a state in which the crane 5 is forcibly opened at an angle θ.If you try to open the crane 5 in this way, one point on the contact surface between the endpiece 4 and the crane 5 becomes the fulcrum 0, and the hinge 6 butterfly piece 9, crane 5 and hinge case 16
begin sliding while restraining each other. Therefore, the distance l between the two magnets 14 and 18 gradually expands, but the mutual attraction force F acts on them. In addition, a stopper 19 is formed at the tip of the butterfly piece 9 to prevent the opening angle θ from becoming too large, and restricts the sliding movement of the magnet 18 fixed to the hinge case 16.

5 and 6 show other embodiments of the crane joint structure according to the present invention, in which case the hinge case is not used as in the above embodiment, and the magnet 1
4 and 18 are directly fixed to the butterfly piece 9 and the temple 5. Similarly, a stopper 19 for regulating the opening angle θ is also provided at the tip of the butterfly piece 9.

Although the helical joint structure of the present invention is not limited to the above-mentioned embodiments, the following effects can be obtained.

(Effects) (1) The crane joint structure of the present invention is such that one butterfly of a hinge that connects the temple so that it can be opened and closed is brazed and fixed to the endpiece, and the other butterfly is restrained in a slidable manner. The temple can be opened a little wider than the normal opening degree, and the temple can absorb the impact force from the outside, preventing damage to the frame as well as situations such as detachment of the lens.
In addition, the vines do not rattle and are highly durable.
Moreover, the glasses can be made easy to wear.

(2) Also, since this temple joint structure uses a magnet as a restoring force to the base position of the temple (regular opening degree), by using a strong magnet, the thickness H and length L can be reduced. It can be reduced and a compact structure can be realized without hindering the slimness of the eyeglass frame.

(3) Furthermore, by simply fixing the magnet in place with screws, adhesives, etc., no special manufacturing steps are required, and the number of parts is small, resulting in a lightweight joint structure.

[Brief explanation of the drawing]

Fig. 1 shows an eyeglass frame having a temple joint structure according to the present invention, and Fig. 2 shows a detailed view of the joint structure.
Figure 3 is an enlarged view of the A-A cross section in Figure 2, Figure 4 shows the temple in an open state, Figure 5 shows an example of a joint structure with another form, and Figure 6 shows the joint structure in Figure 5. An enlarged cross-sectional view taken along the line B-B, and FIGS. 7 and 8 respectively show the conventional example. 1... Rim, 2... Bridge, 3... Nose pad, 4... Endpiece, 5... Crane, 6... Hinge,
7... Lens, 8, 9... Butterfly piece, 10... Guide piece, 11... Top surface, 12... Bottom surface, 13, 17...
...Inner surface, 14, 18...Magnet, 15...Screw, 1
6... Hinge case, 19... Stopper, θ...
Angle, 0... fulcrum.

Claims (1)

[Scope of Claims] 1. At the joint of the temples, which are connected to the endpieces fixed to both sides of the front frame via a hinge so as to be openable and closable, one butterfly piece of the hinge is fixed to the endpieces by brazing. Then, the other butterfly piece is restrained and slidably engaged with the temple, a magnet is fixed to the butterfly piece, and another magnet is fixed to the temple side, and there is a slight gap between the two magnets. A temple joint structure for eyeglass frames characterized by a gap between the joints and mutual attraction between the joints. 2. The crane joint structure for an eyeglass frame according to claim 1, wherein the magnet is fixed to the inner surface of the butterfly piece, and the other magnet is fixed to the inner surface of the hinge case formed in the shape of a temple. 3. A crane joint structure for a megame frame according to claim 1, wherein the magnet is fixed to the inner surface of the butterfly piece, and the other magnet is fixed to the inner surface of the temple.