JP2002082315A - Rim end connector of spectacle frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the appearance of the mounted state of joint pieces by efficiently carrying out the work for brazing the joint pieces to top and bottom end segments of eyewires. SOLUTION: The outer peripheral parts of the upper and lower joint pieces 6 and 7 are provided with fitting grooves 15 and 16. The inside surface sides of both the joint pieces 6 and 7 are provided with recessed parts 23, so as to be recessed on the peripheries at the edges of the fitting grooves 15 and 16. A spacing 38 is formed by matching of the recessed parts 23 and 23 between the edges of the fitting grooves 15 and 16, in a state of the inside surfaces of both joint pieces 6 and 7 being abutted against each other. When the top and bottom end segments of the eyewires are fitted into the upper and lower fitting grooves 15 and 16 and are brazed, the flow of the brazing filler metal made into a molten state on the one fitting groove side is shut off by the spacing 38, so as not to move to the other fitting groove side. The spacing 38 is covered and hidden by the end segments 3 and 5 and will not be exposed, in a state with the end segments of the eyewires being fitted into the fitting grooves 15 and 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention enables the work of brazing a joint piece to each of the upper and lower end portions of a rim to be performed efficiently and improves the appearance of the state of attachment of the joint piece to the end portion of the rim. The present invention relates to a rim end connector of a spectacle frame that can be made.

[0002]

2. Description of the Related Art Conventional connection structures for detachably connecting the rim ends of an eyeglass frame include a structure having a structure shown in FIG. 29 and a structure shown in FIG. Is generally adopted.

[0003] These connecting structures have basically the same configuration, and an upper joint piece b provided with a fitting groove a at an inner end portion thereof and a fitting piece continuous with the fitting groove a. A lower joint piece d having an insertion groove c at an inner end portion is integrally formed so as to be separable by a screw e, and a rim (in accordance with a lens form) is inserted into each of the insertion grooves a and c of the joint pieces b and d. The upper and lower end portions g and h of the annularly bent rim f are fitted and brazed.

[0004] This brazing is performed individually for each of the joint pieces b and d. After fitting the upper end portion g of the rim f into the fitting groove a of the upper joint piece b, the brazing is performed. A molten brazing material is flown between the fitting groove a and the end portion g to braze the upper joint piece b, while the lower end piece h of the rim f is inserted into the fitting groove c of the lower joint piece d. After fitting
A molten brazing material was flowed between the fitting groove c and the end portion h, and the lower joint piece d was brazed.

[0005]

However, according to the above-mentioned conventional brazing method, there is a problem that the upper and lower joint pieces have to be individually brazed to the end portion of the rim, and there is a problem that the working efficiency is poor. Not only that, the fitting between the fitting groove and the end of the rim may not be performed accurately.

That is, as shown in an enlarged view in FIG. 31, for example, the end j of the rim f slightly protrudes from the ends of the fitting grooves a and c of the joint piece b or the joint piece d. There was a problem of producing good products. By holding the lens on such a defective rim, the upper and lower joint pieces b,
If d was screwed and integrated with the screw e, the ends of the rim would not match each other, so that excessive stress would be applied to the lens, and the lens would easily break.

[0007] For this reason, when jointed by screwing, it is necessary to braze both joint pieces b and d so that the ends of the rim match each other correctly, but such brazing work is difficult. It was expensive. For this reason, the work of brazing the joint piece to the end of the rim requires a great deal of caution and much labor, resulting in poor productivity, inevitability of defective products, and increased costs. It was.

Such a problem can be solved by fitting both ends g and h of the rim into the upper and lower fitting grooves a and c in a state where the upper and lower joint pieces b and d are integrated and brazing. It wasn't that I couldn't think of it. However, in the case of brazing in this manner, the molten brazing material flows into the abutting portions k and m of the joint pieces b and d and between the rim ends n and p, so that the joint pieces and the rim ends cannot be separated. It could not be adopted due to some problems.

In order to solve such a problem, it is conceivable that a gap is formed between the upper and lower fitting grooves and the flow of the molten brazing material is blocked by the gap. For example, in the drawing of JP-A-59-202432, there is described a connecting tool r provided with a gap q between upper and lower fitting grooves as shown in FIGS. However, when the upper and lower end portions g and h of the rim are fitted into the fitting grooves s and t of the connecting tool r and brazed, respectively, the joint pieces b and d are more likely to be connected by the flow of the molten brazing material. Also, the risk of brazing between the rim ends n and p can be avoided. However, the upper and lower joint pieces b and d are only in surface contact with their portions u and v, and between the joint pieces b and d, as shown in FIG. A gap q having a large vertical distance is also formed on a side portion deviating from the gap q.

Therefore, when the upper and lower ends of the rim are connected by using the connecting tool having such a configuration, even if it is possible to braze the rim ends in a state of being abutted, FIG.
As shown in (1), there is a problem that the gap q1 on the front side and the gap q2 on the side are conspicuous and the appearance of the connection portion at the rim end is poor.

In addition, the fact that the gap q1 on the front side and the gap q2 on the side are conspicuous as described above is due to the fact that there is no problem with the brazing strength of the upper and lower joint pieces. Because of this, the screws may be loosened and give an impression as if they are structurally defective, and there is also a problem that the commercial value of the glasses is reduced.

An object of the present invention is to provide a rim end connector for an eyeglass frame capable of solving such a problem.

[0013]

In order to solve the above-mentioned problems, the present invention employs the following means. That is, the rim end connector of the eyeglass frame according to the present invention (referred to as a rim end connector).
Is provided with an upper joint piece and a lower joint piece which can be integrated with each other in a state where the inner surfaces are in contact with each other with screws, and the outer peripheral portions of both joint pieces are integrated with each other. A fitting groove for fitting the upper and lower end portions of the rim is provided so as to communicate vertically in the state. Also, on the inner surface side of each joint piece, a recess is provided so as to be recessed around the edge of the fitting groove, and the left and right ends of the recess are from the left and right ends of the fitting groove to the groove bottom side. In a state in which the inner surfaces of the two joint pieces are in contact with each other,
A gap is formed between the inner edges of the fitting grooves by the matching of the upper and lower recesses. When the end portion is fitted into the fitting groove and the end portion is brazed with the fitting groove, the flow of the brazing material in a molten state on one fitting groove side is blocked by the gap and the other fitting is performed. Wherein the gap is covered by the end portion when the end portion of the rim is fitted in the fitting groove. .

[0014] In the rim end connector, the left and right ends of the recess may be located at substantially the center of the left and right sides of the edge of the fitting groove or at a position closer to the end than the center.

Another embodiment of the rim end connector according to the present invention comprises an upper joint piece and a lower joint piece which can be integrated with each other by a screw so that their inner surfaces are in contact with each other. A fitting groove for fitting the upper and lower end portions of the rim is provided in the outer peripheral portion of each of the joint pieces so as to communicate vertically in the integrated state. Also, on the inner surface side of each joint piece, a recess is provided so as to be recessed around the edge of the fitting groove, and the left and right ends of the recess match the left and right tips of the fitting groove, In a state where the inner surfaces of the two joint pieces are brought into contact with each other, a gap is formed between the inner edges of the fitting grooves by matching the upper and lower depressions, and the two fitting grooves communicate with each other. When the two joint pieces were integrated, the ends of the rim were fitted into the fitting grooves, and when the end portions were brazed with the fitting grooves, a molten state was formed on one of the fitting grooves. The flow of the brazing material is blocked by the gap so as not to move to the other fitting groove side, and when the end portion of the rim is fitted in the fitting groove, the gap is covered by the end portion. It is characterized by being made to be.

In each of the rim end couplings, it is preferable that only the groove bottom of the fitting groove is used as a brazing material attaching portion.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] In FIGS. 1 to 4, a rim end connector 1 according to the present invention is applied as a split and a rim 2 is provided.
An upper joint piece 6 and a lower joint piece 7 fixed to the upper and lower end portions 3 and 5 respectively. In particular, in the present embodiment, between the joint pieces 6 and 7,
The connection member 10a can be connected in a sandwiched state, and the connection is performed with a screw 11 communicating the three members. In this connected state, the inner surfaces 6a and 7a of the upper and lower joint pieces 6 and 7 are in contact with each other. The upper and lower joint pieces 6 and 7 and the yoke 10a are formed of a metal material such as a titanium alloy or nickel silver.

As shown in FIGS. 4 to 6, both the joint pieces 6, 7 have a disc shape, and the center portions thereof have through holes 12, 13 for inserting the screw 11.
Is provided. The lower insertion hole 13 is a screw hole 13a that can be screwed with the screw 11. In addition, fitting grooves 15 and 16 for fitting the upper and lower end portions 3 and 5 of the rim are formed in a series of upper and lower portions at required portions of the outer peripheral portion 14 of the upper and lower joint pieces 6 and 7. Further, semi-circular shapes that can be in an unevenly fitted state with, for example, a column-shaped end portion 9 of the connecting member 10 serving as the yoke 10 a are respectively formed on opposing inner surfaces 19 and 20 of the upper and lower joint pieces 6 and 7. An engaging portion 21 composed of a concave groove 21a is provided. The semicircular concave groove 21a is provided so as to open at the outer peripheral portion 14 and to open the insertion holes 12 and 13 at the widthwise central portion of the concave groove bottom 22.

In this embodiment, a recess 23 is provided on the inner surface of the upper and lower joint pieces 6 and 7 so as to be recessed around the edges of the fitting grooves 15 and 16. As shown in FIGS. 5 to 7, for example, the recess 23 has a circular outer shape, and its left and right ends 25, 25 have left and right ends 26, 26, 26, 26
To the groove bottoms 27, 27 side. More specifically, the left and right tips 25, 25 are located slightly closer to the tips than the center of the left and right portions 28a, 28a of the edges 28 of the fitting grooves 15, 16. The size and depth of the recess 23 are set so that the flow of the molten brazing material can be reliably blocked by the gap 38 described later when brazing is performed as described later.

A front end portion 9 of the yoke 10a is formed in a columnar shape, and an insertion hole 30 through which the screw 11 is inserted is vertically penetrated. Hinge pieces 31, 31 with the required vertical spacing
Is provided.

At the front end of the temple 33, a hinge piece 35 inserted between the upper and lower hinge pieces 31, 31 is provided, and the three hinge pieces 31, 35, 31 are connected to the connecting screws 3 respectively.
The temple 33 can be opened and closed by being connected at 7.

The integration of the upper and lower joint pieces 6 and 7 having the above-mentioned structure and the yoroi 10a is performed as follows. That is, as shown in FIG. 3, the cylindrical end portion 9 of the yoroi 10a is fitted into the semicircular concave grooves 21a, 21a of the upper and lower joint pieces 6, 7, and the end portion 9 is moved up and down. After being sandwiched between the joint pieces 6 and 7, the screw 11 is inserted into the through holes 12, 30, and 13 which are communicated with each other, and the
People together. In this integrated state, a gap 38 is formed between the inner edges of the fitting grooves 15 and 16 by the matching of the upper and lower depressions 23 as shown in FIG.

However, in order to connect the rim ends of the spectacle frames to each other using the rim end coupling device 1 having the above configuration, FIG.
As shown in FIGS. 1 to 4, the upper and lower joint pieces 6, 7 and the lip 10a are integrated to bring the fitting grooves 15, 16 into a communicating state, and then the upper and lower end portions 3, 5 of the rim are vertically fitted. It is fitted into the grooves 15 and 16 and brazed. For this purpose, for example, as shown in FIG. 4, thin brazing materials 41, 41 having a required area are attached to the groove bottoms 27, 27 of both fitting grooves 15, 16 by means such as spot welding. Thereafter, the upper and lower end portions 3, 5 of the rim are fitted into the upper and lower fitting grooves 15, 16, and in this state, the fitting groove portions are heated as required to melt the brazing materials 41, 41. The upper and lower joint pieces 6 and 7 are brazed to the upper and lower end portions 3 and 5 of the rim by turning the joint 42 between the outer surface of the end portion of the rim and the inner surface of the fitting groove (FIG. 3). When brazing in this manner, the flow of the brazing material in a molten state on one of the fitting grooves is blocked by the gap 38,
Since it does not move to the other fitting groove side, there is no danger that the upper and lower joint pieces 6, 7 and the upper and lower ends 43, 43 of the rim will be brazed. The amount of the brazing material to be applied is set so that the brazing can be reliably performed by the molten brazing material, and the flow of the brazing material is reliably blocked at the gap 38.

In such a brazed state, if the screw 11 is removed, the upper and lower joint pieces 6, 7 are opened, and the end portion 9 of the yoke 10a can be removed. In the present embodiment, the left and right ends 25, 25 of the recess 23 retreat from the left and right ends 26, 26, 26, 26 of the fitting grooves 15, 15 toward the groove bottoms 27, 27 thereof. Therefore, in a state where the end portions 3, 5 of the rim are brazed by the fitting grooves 15, 15, the gap 38 is formed by the side surfaces 45, 45, 46, of the end portions 3, 5, as shown in FIG.
Since it is covered with 46 and is not exposed on the front side or the side, there is no possibility that the aesthetic appearance of the brazed portion is impaired.

The upper and lower fitting grooves 15 and 16 are formed after the upper and lower joint pieces 6 and 7 and the yoke 10a are integrated with the screw 11 as described above (in this state, the end portion 9 of the yoke and the The upper and lower joint pieces 6, 7 are prevented from rotating by engagement with the semicircular concave grooves 21a, 21a), and can be formed in series by a rotary cutter.

[Second Embodiment] FIGS. 8 to 10 show another embodiment of the rim end connector 1 according to the present invention which is applied as splitting. Has basically the same configuration as in the first embodiment. The difference from the above is that the connecting member 10 is configured as a bridge 10b, not as a spoiler. That is, as described above, the rim 2 is
Instead of being separated at (FIG. 1),
This is related to the case where it is separated in FIG.

In this case, the upper and lower joint pieces 6,
7 is formed in a rectangular plate shape as shown in FIGS. 10 to 12, and fitting grooves 15, 16 having the same configuration as above are provided in the inner edges 50, 51 in a vertically communicating state. .
Also, a semicircular concave groove 21a and a concave portion 23 are provided in the same manner as described above, and the concave portion 23 has a circular outer shape and has both ends 25, as shown in FIGS.
25 is a tip 26, 26, 2 of the fitting groove 15, 16;
6, 26 to the groove bottom 27, 27 side. More specifically, the left and right tips 25, 25
The left and right side portions 28a of the 16 edge portions 28 are located slightly closer to the front end than the center portion. And the inner surface 6a,
7a with the fitting grooves 15,
The desired gap 38 is formed between the inner edges of the base 16 as before, and the upper and lower joint pieces 6 and 7 can be detachably integrated with the screws 11. The end portion 9 of the bridge 10b is formed, for example, in a columnar shape as shown in FIG. 11, and the end portion 9 communicates with the insertion holes 12, 13 provided in the upper and lower joint pieces 6, 7. An insertion hole 30 is provided in this state.

However, as shown in FIG.
The upper and lower joint pieces 6 and 7 are fitted together with the end portion 9 of Ob fitted in the upper and lower semicircular concave grooves 21a and 21a,
A screw 11 is inserted into the three communication holes 12, 30, and 13 and is screwed into a screw hole 13a provided in the lower joint piece 7.
, The upper and lower joint pieces 6, 7 and the bridge 10b can be integrated.

To connect the rim ends of the spectacle frames with each other by using the rim end connector 1 having the above structure, FIG.
As shown in FIGS. 10 to 10, the upper and lower joint pieces 6, 7 and the bridge 10b are integrated to bring both the fitting grooves 15, 16 into a communicating state, and then the upper and lower end portions 3, 5 of the rim are vertically fitted. It is fitted into the grooves 15 and 16 and brazed. for that reason,
For example, as shown in FIG.
As shown in the figure, thin brazing materials 41, 41 having a required area
Is attached by means such as spot welding. Thereafter, the upper and lower end portions 3, 5 of the rim are fitted into the upper and lower fitting grooves 15, 16, and in this state, the fitting groove portions are heated as required to melt the brazing materials 41, 41. The upper and lower joint pieces 6 and 7 are brazed to the upper and lower end portions 3 and 5 of the rim by turning them 42 (FIG. 9) between the outer surface of the end portion of the rim and the inner surface of the fitting groove. When brazing in this manner, the flow of the brazing material in a molten state on one fitting groove side is blocked by the gap 38 and does not move to the other fitting groove side. There is no possibility that the upper and lower ends 43 and 43 of the rim are soldered. The amount of the brazing material to be applied is set such that the brazing can be reliably performed by the molten brazing material and the flow of the brazing material is surely interrupted by the gap 38.

In such a brazed state, if the screw 11 is removed, the upper and lower joint pieces 6, 7 are opened, and the end portion 9 of the yoroi 10a can be removed. In the present embodiment, the left and right ends 25, 25 of the recess 23 retreat from the left and right ends 26, 26, 26, 26 of the fitting grooves 15, 15 toward the groove bottoms 27, 27 thereof. Therefore, in a state where the end portions 3 and 5 of the rim are brazed by the fitting grooves 15 and 15, the gap 38 is formed by the side surfaces 45 and 45 and 46 of the end portions 3 and 5, as shown in FIG.
Since it is covered with 46 and is not exposed on the front side or the side, there is no possibility that the aesthetic appearance of the brazed portion is impaired.

The upper and lower fitting grooves 15 and 16 are formed by integrating the upper and lower joint pieces 6 and 7 and the yoke 10a with the screw 11 as described above (in this state, the upper and lower joint pieces 6 and 7 and the The upper and lower joint pieces 6, 7 are prevented from rotating by engagement with the semicircular concave grooves 21a, 21a), and can be formed in series by a rotary cutter.

[Third Embodiment] FIGS. 14 to 16 show another embodiment of the rim end connector 1 according to the present invention. An upper joint piece 6 and a lower joint piece 7 are formed such that the inner surfaces 6a and 7a can be integrated in a contact state.

As shown in FIGS. 16 and 17, the upper joint piece 6 is bent in an L-shape, and a front portion thereof serves as an attachment portion 52 to the rim 2 and a rear portion thereof. , A hinge portion 53 for pivotally attaching the temple 33. The mounting portion 52 is provided with a U-shaped receiving portion 55 which is opened in any one of the upper and lower directions (in the figure, downward and inward), and a screw hole 56 is formed in a bottom portion of the bottom portion. A fitting groove 15 for fitting the end portion 3 on the rim 2 is provided in the inner end portion of the bottom surface.

On the other hand, the lower joint piece 7 is shown in FIGS.
As shown in FIG.
The inner end portion has a fitting groove 16 into which the lower end portion 5 is fitted, and is housed in the housing portion 55 in a fitted state. Further, an insertion hole 57 for inserting the screw 11 that can be screwed into the screw hole 56 is provided in the outer side portion.

The upper and lower joint pieces 6 and 7 having the above-mentioned structure are respectively provided with concave portions 23 and 23 on the opposed inner surface sides so as to be recessed around the edges of the fitting grooves 15 and 16.
Are provided, and the left and right tips 25, 25 of the recess 23 are
Left and right ends 26, 26, 26, of the fitting grooves 15, 16
26 to the groove bottoms 27, 27 side. More specifically, the left and right ends 25, 25 are connected to the fitting grooves 15, 16 respectively.
Is located slightly closer to the tip than the center of the left and right portions 28a, 28a of the edge 28. And the inner surface 6a,
7a with the fitting grooves 15,
A gap 38 is formed between the inner edge portions 16 by matching the recesses 23, 23 as shown in FIG.

In order to connect the rim ends of the spectacle frames with each other by using the rim end connector 1 having the above-described structure, FIG.
As shown in FIGS. 4 to 15, the upper and lower joint pieces 6, 7 are integrated to bring both the fitting grooves 15, 16 into a communicating state, and then the upper and lower end portions 3, 5 of the rim are connected to the upper and lower fitting grooves 15, 6. 16 and brazed. For that purpose, both fitting grooves 15, 1
For example, as shown in FIG. 16, thin brazing materials 41, 41 having a required area are attached to the groove bottoms 27, 27 by spot welding or the like. Thereafter, the upper and lower end portions 3, 5 of the rim are fitted into the upper and lower fitting grooves 15, 16, and in this state, the fitting groove portions are heated as required to melt the brazing materials 41, 41. Between the outer surface of the end portion and the inner surface of the fitting groove 42 (FIG. 15),
7 is brazed to upper and lower end portions 3 and 5 of the rim. When brazing in this manner, the flow of the brazing material in a molten state on one fitting groove side is blocked by the gap 38 and does not move to the other fitting groove side. There is no possibility that the upper and lower ends 43 and 43 of the rim are soldered. The amount of the brazing material to be applied is set such that the brazing can be reliably performed by the molten brazing material and the flow of the brazing material is surely interrupted by the gap 38.

In this brazed state, the upper and lower joint pieces 6, 7 can be opened by removing the screw 11. Then, the left and right ends 2 of the recess 23
5 and 25 are left and right ends 26 and 2 of the fitting grooves 15 and 15, respectively.
Since the end portions 3 and 5 of the rim are brazed by the fitting grooves 15 and 15 since they have retreated from the grooves 6 and 26 to the groove bottoms 27 and 27 sides, as shown in FIG. But,
Since it is completely covered by the side surfaces 45, 45, 46, 46 of the end portions 3, 5, and is not exposed on the front side or the side surface,
There is no risk of damaging the appearance of the brazed part.

[Fourth Embodiment] FIGS. 19 to 21 show a rim end connector 1 as one end applied to both ends of a bridge 10b. 22 to 23, the rim end connector 1 has an upper joint piece 6 as an end portion of the bridge 10b and a lower portion that can be accommodated in an accommodating portion 55 provided on a lower surface portion of the upper joint piece 6. And joint pieces 7 in the same manner as described above.
Are provided on the inner surface side thereof so as to be recessed around the edges of the fitting grooves 15 and 16, and the recesses 23, 23 are provided.
Left and right ends 25, 25 of the fitting grooves 15, 16 from the left and right ends 26, 26, 26, 26 thereof.
Retreating to the 7 side. More specifically, the left and right tips 25,
25 is the left and right side portion 2 of the edge 28 of the fitting grooves 15 and 16
It is located at a position slightly closer to the tip than the center of 8a, 28a. 21 with the inner surfaces 6a, 7a abutted against each other, between the inner edges of the fitting grooves 15, 16.
As shown in FIG. 7, the desired gap 38 is formed in the same manner as described above, and the upper and lower joint pieces 6 and 7 can be detachably integrated with the screws 11.

In order to connect the rim ends of the spectacle frames with each other by using the rim end connector 1 having the above structure, FIG.
As shown in FIGS. 9 to 20, the upper and lower joint pieces 6, 7 and the bridge 10b are integrated to bring both the fitting grooves 15, 16 into a communicating state, and then the upper and lower end portions 3, 5 of the rim are vertically fitted. It fits into the grooves 15 and 16 and brazes. For this purpose, as shown in FIG. 21, for example, as shown in FIG. 21, a thin brazing material 41 having a required area is provided on the groove bottoms 27, 27 of the fitting grooves 15, 16.
41 is attached by means such as spot welding. Thereafter, the upper and lower end portions 3, 5 of the rim are connected to the upper and lower fitting grooves 15, 16 respectively.
In this state, the fitting groove portion is heated as required to melt the brazing materials 41, 41, and this is placed between the outer surface of the end portion of the rim and the inner surface of the fitting groove 42 (FIG. 20). turn,
Connect the upper and lower joint pieces 6, 7 to the upper and lower end portions 3, 5 of the rim.
To braze. When brazing in this manner, the flow of the brazing material in a molten state on one fitting groove side is blocked by the gap 38 and does not move to the other fitting groove side. There is no possibility that the upper and lower ends 43 and 43 of the rim are soldered. The amount of the brazing material to be applied is set so that the brazing can be reliably performed by the molten brazing material, and the flow of the brazing material is reliably blocked at the gap 38.

In this brazed state, the upper and lower joint pieces 6, 7 can be opened by removing the screw 11. And the left and right tips 25 of the recess 23,
25 are left and right ends 26, 26 of the fitting grooves 15, 15;
Since the end portions 3 and 5 of the rim are brazed by the fitting grooves 15 and 15 because the grooves 38 and 27 are retracted from the groove bottoms 27 and 27 side, as shown in FIG. Since it is completely covered and hidden by the side surfaces 45, 45, 46 and 46 of the end portions 3 and 5 and is not exposed on the front side or the side surface, there is no possibility that the aesthetic appearance of the brazed portion is impaired.

[Other Embodiments] FIG. 24 shows another embodiment of the depression 23 of the upper and lower joint pieces 6, 7 constituting the rim end connector 1 according to the present invention. The left and right front ends 25, 25 of the recess 23 are matched with the left and right front ends 26, 26, 26, 26 of the fitting grooves 15, 16 respectively. FIGS. 25 to 28 show other modes of the recess 23 provided in the upper and lower joint pieces 6 and 7, which are recessed around the edges of the fitting grooves 15 and 16.

[0042]

The present invention has the following excellent effects. (1) When using the rim end connector according to the present invention, when brazing the joint pieces to each of the upper and lower end portions of the rim, the rim is inserted into the upper and lower fitting grooves in a state where both joint pieces are integrated. The upper and lower ends can be fitted and brazed at once. At this time, since the flow of the brazing material can be interrupted by the gap formed between the two joint pieces, the joint pieces and the ends of the rim are securely soldered without causing a problem that they cannot be separated from each other by brazing. It can be brazed. From the above, according to the present invention, the work of brazing the joint pieces can be performed easily and efficiently, so that it is possible to improve productivity and reduce costs.

(2) Insufficient brazing as in the case where the joint pieces are individually brazed to the ends of the rim (as shown in FIG. 31, the end j of the rim is moved from the end of the fitting groove to the end of the fitting groove). Defects such as slightly protruding)
The end of the rim can be accurately brazed to the joint piece.

(3) When the end portion of the rim is fitted in the fitting groove, the gap is covered with the end portion, and the gap is exposed on both the front side and the side. Therefore, the attachment of the joint piece to the end portion of the rim can be performed with good appearance. Moreover, because the gap is not exposed,
As in the above-described conventional structure, there is no danger of giving an impression that the product is structurally defective, and it is possible to prevent a decrease in commercial value due to the exposure of the gap and to provide high value-added glasses. .

(4) When the left and right ends of the recess are aligned with the left and right ends of the fitting groove, a gap is formed over the entire length of the edge of the fitting groove. The flow of material can be more reliably blocked.

(5) In particular, by positioning the left and right ends of the recessed portion substantially at the center of the left and right portions of the edge of the fitting groove or at a position near the front end,
Since the length of the fitting groove along the edge can be sufficient at the left and right portions of the edge, the flow of the brazing material in the gap can be more reliably blocked.

(6) Further, since only the groove bottoms of the upper and lower fitting grooves are used as the brazing material attaching portions, the flow of the brazing material in the gaps provided at the left and right portions of the edge of the fitting groove is blocked. Can be performed more reliably.

[Brief description of the drawings]

FIG. 1 is a plan view showing a rim end connector according to the present invention in a used state.

FIG. 2 is a perspective view showing the state of use.

FIG. 3 is a cross-sectional view showing the state of use.

FIG. 4 is a perspective view showing a rim end connector according to the present invention.

FIG. 5 is an exploded perspective view thereof.

FIG. 6 is a perspective view showing an upper joint piece.

FIG. 7 is a plan view showing a lower joint piece.

FIG. 8 is a perspective view showing another embodiment of the rim end connector according to the present invention in a state of use.

FIG. 9 is a cross-sectional view showing the state of use.

FIG. 10 is a perspective view showing a rim end connector according to the present invention.

FIG. 11 is an exploded perspective view thereof.

FIG. 12 is a perspective view showing an upper joint piece.

FIG. 13 is a plan view showing a lower joint piece.

FIG. 14 is a perspective view showing another aspect of the rim end connector according to the present invention in a state of use.

FIG. 15 is a cross-sectional view showing the state of use.

FIG. 16 is a perspective view showing the rim end connector.

FIG. 17 is an exploded perspective view thereof.

FIG. 18 is a perspective view showing a lower joint piece.

FIG. 19 is a perspective view showing another aspect of the rim end connector according to the present invention in a state of use. .

FIG. 20 is a cross-sectional view showing the state of use.

FIG. 21 is a perspective view showing the rim end connector.

FIG. 22 is an exploded perspective view thereof.

FIG. 23 is a perspective view showing a lower joint piece.

FIG. 24 is a plan view showing another mode of the depression.

FIG. 25 is a plan view showing another mode of the depression.

FIG. 26 is a plan view showing another mode of the depression.

FIG. 27 is a plan view showing another mode of the depression.

FIG. 28 is a perspective view showing another mode of the depression.

FIG. 29 is a cross-sectional view showing an example of a conventional connection structure.

FIG. 30 is a cross-sectional view showing another embodiment of the conventional connection structure.

FIG. 31 is a perspective view showing a state in which the rim is not properly brazed to the joint piece.

FIG. 32 is a perspective view showing a conventional rim end connector.

FIG. 33 is a side view thereof.

FIG. 34 is a perspective view illustrating a problem with the rim end connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rim end connection tool 2 Rim 3 Upper end portion of rim 5 Lower end portion of rim 6 Upper joint piece 7 Lower joint piece 10 Connecting member 11 Screw 15 Fitting groove 16 Fitting groove 23 Recess 25 Recess End of part 26 Tip of fitting groove 27 Groove bottom 38 Gap

Claims (4)

[Claims] 1. An upper joint piece and a lower joint piece which can be integrated with each other in a state where the inner surfaces are in contact with each other by means of screws. A fitting groove for fitting the upper and lower end portions of the rim is provided so as to communicate vertically in a formed state, and the inner surface side of each joint piece is provided around an edge of the fitting groove. A recess is provided so as to be recessed, and left and right ends of the recess are retreated from the left and right ends of the fitting groove to the bottom of the groove, and the inner surfaces of the two joint pieces are brought into contact with each other, Between the inner edges of the fitting grooves, a gap is formed by the matching of the upper and lower depressions, in a state where both fitting grooves are communicated and both joint pieces are integrated,
When the upper and lower end portions of the rim are fitted into the fitting grooves and the end portions are brazed by the fitting grooves, the flow of the brazing material in a molten state on one of the fitting grooves is blocked by the gap. The gap is covered by the end portion when the end portion of the rim is fitted in the fitting groove. Rim end connector of the eyeglass frame. 2. The rim of an eyeglass frame according to claim 1, wherein the left and right ends of the recessed portion are located at substantially the center of the left and right sides of the edge of the fitting groove or near the front end. End connector. 3. An upper joint piece and a lower joint piece which can be integrated with each other in a state where the inner surfaces are in contact with each other by means of screws. A fitting groove for fitting the upper and lower end portions of the rim is provided so as to communicate vertically in a formed state, and the inner surface side of each joint piece is provided around an edge of the fitting groove. A recess is provided so as to be recessed, and left and right ends of the recess are made to match left and right ends of the fitting groove,
In a state where the inner surfaces of the two joint pieces are brought into contact with each other, a gap is formed between the inner edges of the fitting grooves by matching the upper and lower depressions, and the two fitting grooves communicate with each other. When the two joint pieces were integrated, the ends of the rim were fitted into the fitting grooves, and when the end portions were brazed with the fitting grooves, a molten state was formed on one of the fitting grooves. The flow of the brazing material is blocked by the gap so as not to move to the other fitting groove side, and when the end portion of the rim is fitted in the fitting groove, the gap is covered by the end portion. A rim end connector for an eyeglass frame, wherein 4. A brazing material sticking portion only at a groove bottom of said fitting groove.
A rim end connector for an eyeglass frame as described in the above.