JP3401490B2 - Rim end connector for eyeglass frames - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention makes it possible to efficiently braze joint pieces to the upper and lower end portions of a rim, and to improve the appearance of the joint pieces attached to the end portions of the rim. The present invention relates to a rim end connector of a spectacle frame that can be used.

[0002]

2. Description of the Related Art As a conventional connecting structure for connecting the rim ends of a spectacle frame in a separable manner, there is a structure shown in FIG. The one with the structure is generally adopted.

These connecting structures basically have the same structure, and an upper joint piece b having a fitting groove a at its inner end portion and a fitting member continuous with the fitting groove a. A lower joint piece d having an insertion groove c at its inner end portion is separably integrated with a screw e, and each fitting groove a, c of both joint pieces b, d is fitted with a rim (in accordance with a lens form). The upper and lower end portions g and h of a ring-shaped rim) f are fitted and brazed.

This brazing is performed individually for each of the joint pieces b and d. After the upper end portion g of the rim f is fitted into the fitting groove a of the upper joint piece b, the brazing is performed. While the molten brazing material is flown between the fitting groove a and the end portion g to braze the upper joint piece b, the end portion h below the rim f is fitted to the fitting groove c of the lower joint piece d. After fitting,
A molten brazing material was flown between the fitting groove c and the end portion h to braze the lower joint piece d.

[0005]

However, when the conventional brazing method is used, the upper and lower joint pieces must be individually brazed to the end portions of the rim, which causes a problem of poor work efficiency. In addition, the fitting groove and the end portion of the rim may not be fitted correctly.

That is, for example, as shown in an enlarged view in FIG. 31, the end j of the rim f is slightly protruded from the ends of the fitting grooves a and c of the joint piece b or the joint piece d. There was a problem that a good product was generated. By holding the lens on such a defective rim, the upper and lower joint pieces b,
If d was tightened with the screw e and integrated, the ends of the rim would not be correctly aligned with each other, resulting in excessive stress being applied to the lens, which would easily cause lens cracking.

For this reason, both joint pieces b and d must be brazed so that the ends of the rim are correctly aligned when the screws are integrally tightened, but such brazing work is difficult. It was expensive. For this reason, the work of brazing the joint piece to the end portion of the rim requires a great deal of caution and a lot of labor, resulting in poor productivity, and the occurrence of defective products is unavoidable, which causes a problem of cost increase. It was.

Such a problem can be solved by fitting both end portions g and h of the rim into the upper 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 impossible to think of it. However, when brazing is performed in this way, the molten brazing material also flows into the contact portions k and m of the joint pieces b and d and the rim ends n and p, so that the joint pieces and the rim ends cannot be separated from each other. It could not be adopted because of the problem.

In order to solve such a problem, it is considered 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 drawings of JP-A-59-202432, a connector r having a gap q between upper and lower fitting grooves is shown as shown in FIGS. However, when the upper and lower end portions g and h of the rim are fitted into the respective fitting grooves s and t of the connecting tool r and brazed, the joint pieces b and d are connected to each other by the flow of the molten brazing material. The risk of brazing between the rim ends n and p can be avoided. However, the upper and lower joint pieces b and d only make surface contact with their portions u and v, and between the joint pieces b and d, as shown in FIG. A gap q with a large vertical distance is also formed on the side portion deviated from the side.

Therefore, when the upper and lower end portions of the rim are connected by using the connecting tool having such a structure, it is possible to braze the rim end portions in a state of abutting each other, but FIG.
As shown in (1), the gap q1 on the front side and the gap q2 on the side were conspicuous, and there was a problem in that the appearance of the connecting portion at the rim end was poor.

In addition, the fact that the front-side gap q1 and the side-face gap q2 are conspicuous in this way is such that there is no problem in the brazing strength of the upper and lower joint pieces, but such a gap is present. As a result, the screws may be loose and give the impression that the product is structurally defective, and there is also the problem of reducing the commercial value of the eyeglasses.

An object of the present invention is to provide a rim end connector for an eyeglass frame which can solve the above problems.

[0013]

In order to solve the above problems, the present invention adopts the following means. That is, the rim end connector of the eyeglass frame according to the present invention (referred to as rim end connector)
Is provided with an upper joint piece and a lower joint piece which can be integrated with each other by a screw so that the inner surfaces are in contact with each other. Fitting grooves for fitting the upper and lower end portions of the rim are provided so as to communicate vertically in a state. Further, 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 located from the left and right ends of the fitting groove to the groove bottom side thereof. With retracted, the inner surfaces of both joint pieces are in contact with each other,
A gap is formed between the inner edges of the fitting groove by the matching of the upper and lower recesses, and both fitting grooves are communicated with each other so that both joint pieces are integrated with each other. When the end portion is fitted into the fitting groove and the end portion is brazed in the fitting groove, the flow of the brazing material melted on one fitting groove side is blocked by the gap and the other fitting It is characterized in that it does not move to the insertion groove side, and when the end portion of the rim is fitted in the fitting groove, the gap is covered by the end portion. .

In the rim end connector, it is preferable that the left and right ends of the recess are located at substantially the center of the left and right side portions of the edge of the fitting groove or a portion closer to the tip than that.

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. Fitting grooves for fitting the upper and lower end portions of the rim are provided on the outer peripheral portions of both joint pieces so as to communicate with each other in the integrated state. Further, 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 made to match the left and right ends of the fitting groove, With the inner surfaces of the two joint pieces being in contact with each other, a gap is formed between the inner edges of the fitting groove by the matching of the upper and lower recesses, and the fitting grooves are communicated with each other. Then, when both end portions of the rim are fitted into the fitting groove and the end portions are brazed in the fitting groove in a state where both joint pieces are integrated, one fitting groove side is in a molten state. 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 performed as described above.

In each of the rim end connection tools, it is preferable that only the groove bottom of the fitting groove is used as the brazing material attachment portion.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] In FIGS. 1 to 4, the rim end connector 1 according to the present invention is applied as a splitting tool, and a rim 2 is used.
An upper joint piece 6 and a lower joint piece 7 which are respectively fixed to the upper and lower end portions 3, 5. In particular, in the present embodiment, the joint 10
The connection member 10 as a can be connected in a sandwiched state, and the connection is performed by using a screw 11 that connects the three members. In this connected state, the inner surfaces 6a, 7a of the upper and lower joint pieces 6, 7 are in contact with each other. The upper and lower joint pieces 6 and 7 and the end piece 10a are made of a metal material such as titanium alloy or nickel silver.

As shown in FIGS. 4 to 6, both joint pieces 6 and 7 are disk-shaped, and insertion holes 12 and 13 through which the screw 11 is inserted are formed in the central portions thereof.
Is provided. The lower insertion hole 13 is a screw hole 13a that can be screwed into the screw 11. Fitting grooves 15 and 16 for fitting the upper and lower end portions 3 and 5 of the rim are formed in a series at upper and lower portions of the outer peripheral portion 14 of the upper and lower joint pieces 6 and 7, respectively. Further, on each of the inner surface sides 19 and 20 of the upper and lower joint pieces 6 and 7 which face each other, a semicircular shape which can be in a concave-convex fitting state with, for example, a column-shaped end portion 9 of the connecting member 10 as the end piece 10a. An engaging portion 21 including a groove 21a is provided. The semicircular groove 21a is provided so as to be open at the outer peripheral portion 14 and the insertion holes 12 and 13 are opened at the center portion of the groove bottom 22 in the width direction.

Further, in the present embodiment, recesses 23 are provided on the inner surfaces of the upper and lower joint pieces 6, 7 so as to be recessed around the edges of the fitting grooves 15, 16. As shown in FIGS. 5 to 7, for example, the recess 23 has a circular outer shape, and the left and right ends 25, 25 of the recesses 23 have the left and right ends 26, 26, 26, 26 of the fitting grooves 15, 16. 26
From the groove bottom 27, 27 side. More specifically, the left and right tips 25, 25 are located closer to the baffle tip than the central portions of the left and right portions 28a, 28a of the edge portion 28 of the fitting grooves 15, 16. The size and depth of the recessed portion 23 are set so that the flow of the brazing material in a molten state can be reliably interrupted by a gap 38 described later when brazing as described later.

The end portion 9 on the front side of the end piece 10a is formed in a columnar shape, and an insertion hole 30 for inserting the screw 11 is vertically provided so as to extend through the rear end portion of the end piece 10a. Hinge pieces 31 and 31 with a required vertical spacing
Is provided.

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

The upper and lower joint pieces 6 and 7 and the end piece 10a having the above structure are integrated as follows. That is, as shown in FIG. 3, the cylindrical end portion 9 of the end piece 10a is fitted into the semi-circular grooves 21a, 21a of the upper and lower joint pieces 6, 7 to move the end portion 9 into the upper and lower portions. After being sandwiched by the joint pieces 6 and 7, the screw 11 is inserted into the communicating through holes 12, 30, and 13 and screwed into the screw hole 13a, thereby
Unite people. Then, in this integrated state, as shown in FIG. 4, a gap 38 is formed between the inner edge portions of both fitting grooves 15 and 16 by the matching of the upper and lower recessed portions 23 and 23.

Therefore, in order to connect the rim end portions of the spectacle frame to each other by using the rim end connector 1 having the above-described structure, FIG.
As shown in FIGS. 4 to 4, the upper and lower joint pieces 6 and 7 and the end piece 10a are integrated so that both fitting grooves 15 and 16 are in communication with each other, and then the upper and lower end portions 3 and 5 of the rim are fitted to each other. Fit in the grooves 15 and 16 and braze. For this purpose, 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 of spot welding or the like, as shown in FIG. 4, for example. After that, the upper and lower end portions 3 and 5 of the rim are fitted into the upper and lower fitting grooves 15 and 16, and in this state, the fitting groove portions are heated as required to melt the brazing materials 41 and 41. The upper and lower joint pieces 6, 7 are brazed to the upper and lower end portions 3, 5 of the rim by turning between the outer surface of the end portion of the rim and the inner surface of the fitting groove 42 (FIG. 3). When brazing is performed in this manner, the flow of the brazing material melted on one fitting groove side is blocked by the gap 38,
Since it does not move to the other fitting groove side, there is no risk 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 stuck is set so that the brazing can be surely performed by the molten brazing material and the flow of the brazing material is surely blocked by the gap 38.

In this brazed state, by removing the screw 11, the upper and lower joint pieces 6 and 7 are opened, and the end portion 9 of the end piece 10a can be removed. Further, in the present embodiment, the left and right tips 25, 25 of the recess 23 are retracted from the left and right tips 26, 26, 26, 26 of the fitting grooves 15, 15 to the groove bottom 27, 27 side. Therefore, in a state where the end portions 3 and 5 of the rim are brazed in the fitting grooves 15 and 15, as shown in FIG. 2, the gap 38 forms the side surfaces 45, 45, 46, and 46 of the end portions 3 and 5, respectively.
Since it is covered with 46 and is not exposed on the front side or the side, there is no fear of impairing the aesthetic appearance of the brazed portion.

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

[Second Embodiment] FIGS. 8 to 10 show another aspect of the rim end connector 1 according to the present invention applied as a splitting tool. The rim end connector 1 is shown in FIG. 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 an endpiece. That is, the rim 2 has the outer portion 47 as described above.
Instead of being separated by (Fig. 1), the inner part 49
This is related to the case of being separated in (FIG. 8).

In this case, the upper and lower joint pieces 6,
As shown in FIGS. 10 to 12, 7 is formed in a rectangular plate shape, and inner side edge portions 50 and 51 thereof are provided with fitting grooves 15 and 16 having the same configuration as the above in a vertically communicating state. .
Further, the semicircular groove 21a and the recessed portion 23 are provided in the same manner as described above, and the recessed portion 23 has a circular outer shape and both end portions 25, as shown in FIGS.
The reference numeral 25 designates the tips 26, 26, 2 of the fitting grooves 15, 16.
It retreats from 6, 26 to the groove bottom 27, 27 side. More specifically, the left and right tips 25, 25 have the fitting grooves 15,
The left and right side portions 28a, 28a of the 16 edge portions 28 are located closer to the tip than the central portion. And the inner surface 6a,
In the state where the 7a are in contact with each other, the fitting groove 15,
A gap 38 is formed between the inner edges of 16 in the same manner as described above, and the upper and lower joint pieces 6 and 7 can be separably integrated with a screw 11. Further, the end portion 9 of the bridge 10b is formed, for example, in a cylindrical shape as shown in FIG. 11, and the end portion 9 communicates with the insertion holes 12 and 13 provided in the upper and lower joint pieces 6 and 7. The insertion hole 30 is provided in this state.

Therefore, as shown in FIG.
With the end portion 9 of 0b fitted in the upper and lower semi-circular grooves 21a, 21a, the upper and lower joint pieces 6, 7 are aligned,
Moreover, the screw 11 is inserted into the three communication holes 12, 30, and 13, and the screw 11 is provided in the joint piece 7 below.
The upper and lower joint pieces 6 and 7 and the bridge 10b can be integrated with each other by screwing.

To connect the rim ends of the spectacle frame to each other using the rim end connector 1 having the above structure,
As shown in FIGS. 10 to 10, the upper and lower joint pieces 6 and 7 and the bridge 10b are integrated so that the fitting grooves 15 and 16 are in communication with each other, and then the upper and lower end portions 3 and 5 of the rim are fitted into the upper and lower parts. Fit in the grooves 15 and 16 and braze. for that reason,
In the groove bottoms 27, 27 of both fitting grooves 15, 16, for example, FIG.
As shown in FIG.
Is attached by means such as spot welding. After that, the upper and lower end portions 3 and 5 of the rim are fitted into the upper and lower fitting grooves 15 and 16, and in this state, the fitting groove portions are heated as required to melt the brazing materials 41 and 41. The upper and lower joint pieces 6, 7 are brazed to the upper and lower end portions 3, 5 of the rim by turning between the outer surface of the end portion of the rim and the inner surface of the fitting groove 42 (FIG. 9). When brazing is performed in this way, the flow of the brazing material melted on one fitting groove side is blocked by the gap 38 and does not move to the other fitting groove side. 7 There is no risk of brazing to each other or to the upper and lower ends 43, 43 of the rim. The amount of the brazing material to be stuck is set so that the brazing can be surely performed by the molten brazing material and the flow of the brazing material is surely blocked by the gap 38.

In this brazed state, if the screw 11 is removed, the upper and lower joint pieces 6 and 7 are opened and the end portion 9 of the end piece 10a can be removed. Further, in the present embodiment, the left and right tips 25, 25 of the recess 23 are retracted from the left and right tips 26, 26, 26, 26 of the fitting grooves 15, 15 to the groove bottom 27, 27 side. Therefore, in the state where the end portions 3 and 5 of the rim are brazed in the fitting grooves 15 and 15, as shown in FIG. 8, the gap 38 forms the side surfaces 45, 45, 46, and 46 of the end portions 3 and 5, respectively.
Since it is covered with 46 and is not exposed on the front side or the side, there is no fear of impairing the aesthetic appearance of the brazed portion.

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

[Third Embodiment] FIGS. 14 to 16 show another embodiment of the rim end connector 1 according to the present invention, which is applied as a single tool and has a screw 11. , The inner surfaces 6a, 7a include an upper joint piece 6 and a lower joint piece 7 which can be integrated with each other in a contact state.

As shown in FIGS. 16 to 17, the upper joint piece 6 is bent in an L-shape, and its front side portion serves as a mounting portion 52 to the rim 2 and its rear side portion. , A hinge portion 53 for pivotally attaching the temple 33. A U-shaped accommodating portion 55 that opens downward or inward in the figure is provided in the mounting portion 52, and a screw hole 56 is provided at the outer side portion of the bottom portion. Further, a fitting groove 15 for fitting the upper end portion 3 of the rim 2 is provided in the inner end portion of the bottom surface portion.

On the other hand, the lower joint piece 7 is shown in FIG.
As shown at 18, the rim 2 is continuous with the fitting groove 15 and
The inner end portion has a fitting groove 16 into which the lower end portion 5 is fitted, and the fitting groove 16 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 portion.

The upper and lower joint pieces 6 and 7 having such a structure have recessed portions 23 and 23, respectively, which are recessed around the edges of the fitting grooves 15 and 16 on the inner surface sides facing each other.
And the left and right tips 25, 25 of the recess 23 are
The left and right tips 26, 26, 26 of the fitting grooves 15 and 16,
It retreats from 26 to the groove bottom 27, 27 side. More specifically, the left and right tips 25, 25 have the fitting grooves 15, 16
The edge portions 28 are located closer to the tip than the central portions of the left and right side portions 28a, 28a. And the inner surface 6a,
In the state where the 7a are in contact with each other, the fitting groove 15,
A gap 38 is formed between the inner edge portions of 16 by the matching of the recessed portions 23, 23 as shown in FIG.

To connect the rim ends of the spectacle frame to each other using the rim end connector 1 having the above structure,
As shown in FIGS. 4 to 15, the upper and lower joint pieces 6 and 7 are integrated so that both fitting grooves 15 and 16 are in a communicating state, and then the upper and lower end portions 3 and 5 of the rim are fitted to the upper and lower fitting grooves 15 and 16. Fit in 16 and braze. For that purpose, both fitting grooves 15, 1
For example, as shown in FIG. 16, thin brazing materials 41 and 41 having a required area are attached to the groove bottoms 27 and 27 of No. 6 by means such as spot welding. After that, the upper and lower end portions 3 and 5 of the rim are fitted into the upper and lower fitting grooves 15 and 16, and in this state, the fitting groove portions are heated as required to melt the brazing materials 41 and 41, Between the outer surface of the end portion of the and the inner surface of the fitting groove 42 (FIG. 15), and the upper and lower joint pieces 6,
7 is brazed to the upper and lower end portions 3, 5 of the rim. When brazing is performed in this way, the flow of the brazing material melted on one fitting groove side is blocked by the gap 38 and does not move to the other fitting groove side. 7 There is no risk of brazing to each other or to the upper and lower ends 43, 43 of the rim. The amount of the brazing material to be stuck is set so that the brazing can be surely performed by the molten brazing material and the flow of the brazing material is surely blocked by the gap 38.

In this brazed state, the upper and lower joint pieces 6 and 7 can be opened by removing the screw 11. Then, the left and right tips 2 of the recess 23
5, 25 are left and right tips 26, 2 of the fitting grooves 15, 15.
Since the recesses 6, 6 and 26 retreat toward the groove bottoms 27 and 27, when the rim end portions 3 and 5 are brazed in the fitting grooves 15 and 15, 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 surface side or the side surface side,
There is no fear of spoiling the beauty of the brazed part.

[Fourth Embodiment] FIGS. 19 to 21 show that the rim end connector 1 as one piece is applied to both ends of the bridge 10b. 22 to 23, the rim end coupling tool 1 can be accommodated in an upper joint piece 6 as an end side portion of the bridge 10b and an accommodating portion 55 provided in a lower surface portion of the upper joint piece 6. And the joint piece 7 of each of the joint pieces 6 and 7 in the same manner as described above.
Are provided on the inner surface side of the recesses 23, 23 so as to be recessed around the edges of the fitting grooves 15, 16, and the recesses 23, 23 are provided.
The left and right tip ends 25, 25 of the fitting grooves 15, 16 extend from the left and right tip ends 26, 26, 26, 26 of the fitting grooves 15, 16 to their groove bottoms 27, 2.
Retired to side 7. More specifically, the left and right tips 25,
25 is a left and right side portion 2 of the edge portion 28 of the fitting grooves 15 and 16.
8a and 28a are located closer to the tip than the central part. Then, in a state where the inner surfaces 6a and 7a are brought into contact with each other, a gap between the inner edge portions of the fitting grooves 15 and 16 is shown in FIG.
As shown in FIG. 5, the objective gap 38 is formed similarly to the above, and the upper and lower joint pieces 6 and 7 can be separably integrated with the screw 11.

To connect the rim ends of the spectacle frame to each other using the rim end connector 1 having the above-described structure,
As shown in FIGS. 9 to 20, the upper and lower joint pieces 6 and 7 and the bridge 10b are integrated so that both fitting grooves 15 and 16 are in a communicating state, and then the upper and lower end portions 3 and 5 of the rim are fitted to each other. It is fitted in the insertion grooves 15 and 16 and brazed. Therefore, as shown in, for example, FIG. 21, a thin brazing material 41 having a required area is formed on the groove bottoms 27, 27 of both fitting grooves 15, 16.
41 is attached by means such as spot welding. Then, the upper and lower end portions 3 and 5 of the rim are attached to the upper and lower fitting grooves 15 and 16 respectively.
The brazing material 41, 41 is melted by heating the fitting groove portion as required in this state, and the brazing material 41, 41 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 parts 3, 5 of the rim.
Braze to. When brazing is performed in this way, the flow of the brazing material melted on one fitting groove side is blocked by the gap 38 and does not move to the other fitting groove side. 7 There is no risk of brazing to each other or to the upper and lower ends 43, 43 of the rim. The amount of the brazing material to be stuck is set so that the brazing can be surely performed by the molten brazing material and the flow of the brazing material is surely blocked by the gap 38.

In this brazed state, the upper and lower joint pieces 6 and 7 can be opened by removing the screw 11. The left and right tips 25 of the recess 23,
25 is the left and right tips 26, 26 of the fitting grooves 15, 15.
Since the recesses 26, 26 retreat toward the groove bottoms 27, 27, when the rim end portions 3, 5 are brazed in the fitting grooves 15, 15, as shown in FIG. 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 surface or the side surface side, so that there is no fear of impairing the aesthetic appearance of the brazed portion.

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

[0042]

The present invention has the following excellent effects. (1) With the rim end connector according to the present invention, when the joint pieces are brazed to the upper and lower end portions of the rim, respectively, the rims are fitted in the upper and lower fitting grooves in a state where both joint pieces are integrated. The upper and lower end portions of the can be fitted and brazed at one time. At this time, since the flow of the brazing material can be blocked by the gap formed between both joint pieces, the joint pieces and the end portions of the rim are brazed to each other without causing a problem of being inseparable, and reliably. You will be able to braze. From the above, according to the present invention, the brazing work of the joint piece can be performed easily and efficiently, and the productivity can be improved and the cost can be reduced.

(2) In addition, a brazing failure such as in the case where the joint pieces are individually brazed to the end portions of the rim (as shown in FIG. 31, the end portion j of the rim is separated from the end portion of the fitting groove). Without causing defects such as a slightly protruding state)
The end of the rim can be brazed to the joint piece accurately.

(3) Further, when the end portion of the rim is fitted in the fitting groove, the gap is covered by the end portion, and the gap is exposed on the front side and the side surface side. First, the attachment of the joint piece to the end portion of the rim can be performed nicely. Moreover, because the gap is not exposed,
As in the conventional structure, there is no possibility of giving the impression that the product is structurally defective, and it is possible to prevent the decline in the commercial value due to the exposure of the gap and provide high-value-added eyeglasses. .

(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 material flow can be blocked more reliably.

(5) In particular, by locating the left and right ends of the recessed portion at substantially the center of the left and right sides of the edge of the fitting groove, or by locating them near the tip,
Since the length of the fitting groove along the edge portion can be made sufficient even in the left and right side portions of the edge portion, the brazing material flow in the gap can be blocked more reliably.

(6) Also, by making only the groove bottoms of the upper and lower fitting grooves the brazing material sticking portions, the flow of the brazing material in the gap provided at the left and right sides of the edge of the fitting groove is blocked. Can be performed more reliably.

[Brief description of drawings]

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

FIG. 2 is a perspective view showing the usage state.

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

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 aspect of the rim end connector according to the present invention in its use state.

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

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 its use state.

FIG. 15 is a cross-sectional view showing the usage state thereof.

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 its use state. .

FIG. 20 is a cross-sectional view showing the usage state thereof.

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 aspect of the recessed portion.

FIG. 25 is a plan view showing another aspect of the hollow portion.

FIG. 26 is a plan view showing another aspect of the recessed portion.

FIG. 27 is a plan view showing another aspect of the recessed portion.

FIG. 28 is a perspective view showing another aspect of the recessed portion.

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

FIG. 30 is a cross-sectional view showing another aspect of the conventional connecting structure.

FIG. 31 is a perspective view showing a defective brazing state of the rim with respect 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 of the rim end connector.

[Explanation of symbols]

1 Rim end connector 2 rims 3 Upper edge of rim 5 The bottom edge of the rim 6 Top joint piece 7 Lower joint piece 10 Connection member 11 screws 15 Fitting groove 16 Fitting groove 23 Depression 25 End of dent 26 Tip of fitting groove 27 groove bottom 38 Gap

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G02C 1/08 B23K 1/00 330 G02C 5/00

Claims (4)

(57) [Claims] 1. 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. Fitting grooves for fitting the upper and lower end portions of the rim are provided so as to communicate with each other in an upper and lower state, and on the inner surface side of each joint piece, around the edge portion of the fitting groove. The recessed portion is provided so as to be recessed, and the left and right ends of the recessed portion recede from the left and right ends of the fitting groove to the groove bottom side, and the inner surfaces of both joint pieces are in contact with each other, A gap is formed between the inner edge portions of the fitting groove by the matching of the upper and lower recesses, and both fitting grooves are communicated with each other to integrate both joint pieces.
When the upper and lower end portions of the rim are fitted in the fitting groove and the end portions are brazed in the fitting groove, the flow of the brazing material melted on one fitting groove side 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 eyeglass frames. 2. The rim of a spectacle frame according to claim 1, wherein the left and right ends of the recessed portion are located at a substantially central portion of the left and right side portions of the edge portion of the fitting groove or a portion near the tip. End connector. 3. 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. The joint pieces are provided on the outer peripheral portions of both joint pieces. Fitting grooves for fitting the upper and lower end portions of the rim are provided so as to communicate with each other in an upper and lower state, and on the inner surface side of each joint piece, around the edge portion of the fitting groove. The recessed portion is provided so as to be recessed, and the left and right ends of the recessed portion are made to match the left and right ends of the fitting groove,
With the inner surfaces of the joint pieces in contact with each other, a gap is formed between the inner edge portions of the fitting groove by the matching of the upper and lower recesses, and the fitting grooves are communicated with each other. Then, when both end portions of the rim are fitted into the fitting groove and the end portions are brazed in the fitting groove in a state where both joint pieces are integrated, one fitting groove side is in a molten state. 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, which is characterized in that 4. The brazing material is attached only to the groove bottom of the fitting groove.
The rim end connector of the eyeglass frame described.