JP2011112974A - Connection structure of glasses parts - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection structure of glasses parts, which can provide connection and whirl-stop at the same time only by forming at least one hole in parts such as a lens and which is easily assembled and which does not cause looseness. <P>SOLUTION: The connection structure of the parts configuring the glasses has at least one shaft portion 60 formed on one part 6, the hole 20 which is formed on the other part 2 and which has the same inner diameter as an outer diameter of the shaft portion 60, and to which the shaft portion 60 is inserted, a groove-like or hole-like engaging section 61 which is formed on an outer periphery of the shaft portion 60, and at least one sphere 62 that is engaged with the engaging section 61, and the shaft portion 60 is press-fitted to the hole 20 in a state where the engaging section 61 holds the sphere 62. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a structure for connecting spectacle parts such as a lens and a lens or a lens and a bridge.

For example, in two-point type glasses, a bolt is generally used in a connection structure that connects a lens and a lens and a lens and a bridge. Such bolts have a problem of loosening over time, but if they are fastened with high torque so that they do not easily loosen, there is a risk that the lens will be distorted or cracked.
In addition, a connection structure in which a connection portion is configured by a single bolt and a pin for preventing rotation to reduce the number of bolts that may be loosened is also known.
However, in the above-described conventional connection structure, since all use bolts, the problem of looseness cannot be solved completely, and at least two holes through which the bolts and pins are inserted must be accurately positioned. The lens itself must be drilled, increasing the number of processes and increasing the assembly cost, and the distance between the hole through which the pin is inserted and the hole through which the bolt is inserted shifts, making it impossible to assemble the parts. Could become defective.

JP-A-8-54582 JP 2002-350783 A Utility model registration No. 3103059

  The present invention has been made in view of the above-described problems, and it is possible to perform connection and rotation prevention at the same time by simply forming at least one hole in a component such as a lens, and it is easy to assemble and loosen. It is intended to provide a connecting structure for no spectacle parts.

In order to achieve the above object, the eyeglass component connecting structure according to claim 1 is a structure for connecting eyeglass components, and includes at least one shaft portion formed on one part and the other part. A hole having the same inner diameter as the outer diameter of the shaft portion, into which the shaft portion is inserted, a groove-like or hole-like engagement portion formed on the outer peripheral surface of the shaft portion, and It has at least one sphere engaged with the engaging portion, and the shaft portion is press-fitted into the hole in a state where the sphere is held in the engaging portion.
As described in the second aspect, the present invention can be suitably applied to a connecting structure of a wisdom or bridge and a lens.
According to the above configuration, the shaft portion formed in the wisdom or the bridge is pushed into the hole formed in the lens or the like while holding the sphere in the engaging portion. The shaft body is press-fitted into the hole to a predetermined depth position while causing the sphere to bite into the inner peripheral surface of the hole. Therefore, the sphere is preferably harder than the other part (for example, a lens or the like). Since the sphere is in a state of biting into the inner peripheral surface of the hole, the shaft once press-fitted does not easily loosen or come off. In addition, since the sphere bites into both the shaft body and the inner peripheral surface of the hole, the shaft body is firmly fixed to the inner peripheral surface of the hole via the sphere, and the wisdom and the bridge rotate with respect to the lens. There is no such thing as to do.
According to a third aspect of the present invention, in the groove or hole formed in the shaft portion, when the sphere is engaged, the portion of the sphere protruding from the outer peripheral surface of the shaft is larger than the radius of the sphere. Try to make it small.
In this way, when the shaft portion is pushed into the hole, a force that is pressed against the bottom of the groove or the hole acts on the sphere, thereby preventing the sphere from falling off during the pushing operation. According to a fourth aspect of the present invention, the shaft body can be pushed into the hole more easily by holding the spherical body through the adhesive in the engaging portion.
Moreover, you may form the groove-shaped or recessed fitting part fitted to the said spherical body in the internal peripheral surface of the said hole as described in Claim 5. By doing in this way, when a shaft part is pushed in to the predetermined depth position in a hole, a spherical body fits with a fitting part and positioning can be performed with higher accuracy.
Further, in the present invention, it is possible to reinforce by filling an adhesive between the shaft portion and the inner peripheral surface of the hole. In this case, as described in claim 6, when the adhesive is applied to the base portion of the shaft portion and the shaft portion is press-fitted into the hole portion, the adhesive is attached to the shaft along with the press-fitting operation. Since the gap between the portion and the inner peripheral surface of the hole is filled, workability is improved.

  According to the present invention, it is possible to easily connect components such as a lens and a lens or a lens and a bridge with a single touch, and to obtain a connection structure in which loosening is unlikely to occur. Moreover, even with one shaft portion and one hole, the spectacle parts can be firmly connected, and the rotation is firmly restricted, so that the workability is improved and the assembling cost of the spectacles is reduced. be able to.

DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic perspective view of two-point glasses to which a connection structure according to an embodiment of the present invention is applied.
The spectacles are composed of left and right resin lenses (hereinafter simply referred to as “lenses”) 2, metal tips 3 made of titanium or the like attached to both ends of the lenses 2, and the tips 3 can be folded by hinges 4. It has a temple 5 that can be unfolded freely, a metal bridge 6 that connects the left and right lenses 2 at the center, and a nose pad 7 that is attached to the bridge 6.
In this embodiment, the connecting structure of the present invention is applied to connecting portions (A, D) between the left and right ends 3 and the left and right lenses 2 and connecting portions (B, C) between both ends of the bridge 6 and the left and right lenses 2. Is done.

2A and 2B relate to an embodiment of the connection structure of the present invention, in which FIG. 2A shows an exploded state of the connection structure, FIG. 2B shows a state in which a sphere is held in the groove of the shaft part, and FIG. FIG. 2 is a partially enlarged perspective view showing the state when the sphere is pressed into the hole and the bridge is connected to the lens.
In FIG. 2, only the connection portion (B) between one end of the bridge 6 and the lens 2 is shown, but the same applies to the other portions (A, C, D). Will not be described.

A shaft 60 made of the same metal as the bridge 6 is erected at one end of the bridge 6. A groove 61 is formed in the middle portion between the tip and base of the shaft portion 60 over the entire circumference of the outer peripheral surface of the shaft portion 60. The groove 61 can be formed by a known method such as cutting using a lathe, rolling using a rolling die, or laser processing.
A hole 20 having the same inner diameter as the outer diameter of the shaft portion 60 is formed through the lens 2 made of urethane resin or the like.
As the sphere 62, a commercially available steel ball used for mechanical parts such as a bearing can be used. If the hardness is higher than that of the lens 2, another sphere 62 made of ceramic or the like may be used. Moreover, although the number of the spheres 62 held by the shaft portion 60 may be one, the connection strength can be increased by using a plurality of spheres 62. On the other hand, if the number of the spheres 62 is too large, a larger force is required at the time of press-fitting, which may make it difficult to assemble, or the lens 2 may be cracked or chipped. Or three.

FIG. 3 is a cross-sectional view showing the relationship between the groove 61 and the sphere 62. The diameter of the sphere 62 may be substantially the same as the width of the groove 61. However, the diameter of the sphere 62 is larger than the width of the groove 61 so that the sphere 62 can be fitted and held in the groove 61 as shown in FIG. Slightly larger is preferable.
Further, the depth D of the groove 61 is preferably slightly larger than the radius r of the sphere 62 as shown in FIG. Thus, when the shaft portion 60 is pushed into the hole 20, a force that is pressed against the bottom of the groove 61 acts on the sphere 62 so that the sphere 62 does not easily fall out of the groove 61 during the pushing operation. To do.

When the bridge 6 is attached to the lens 2, as shown in FIG. 2 (b), the spherical body 62 is fitted and held in the groove 61 of the shaft portion 60. An adhesive may be applied to the inside of the groove 61 to hold the sphere 62.
In this state, the shaft portion 60 and the sphere 62 are press-fitted into the hole 20 of the lens 2. This press-fitting is performed until the bridge 6 contacts the surface of the lens 2. The state where the connection is completed in this way is shown in the cross-sectional views of FIGS.
By the press-fitting operation, the sphere 62 advances while pushing and expanding the inner peripheral surface of the hole 20, but the inner peripheral surface of the hole 20 through which the sphere 62 has passed is slightly reduced in diameter due to its elasticity, and the return of the sphere 62 and the shaft portion 60. To regulate. Thereby, the detachment of the sphere 62 and the shaft portion 60 is strongly suppressed.
In the connection structure of the present invention, an adhesive may be filled between the shaft portion 60 and the hole 20 for the purpose of increasing the connection strength. For example, as shown in FIG. 5A, if the adhesive 63 is applied to the base portion of the shaft portion 60, the shaft portion 60 and the sphere 62 are connected to the hole 20 of the lens 2 as shown in FIG. Along with the press-fitting operation for press-fitting into the inner surface, the adhesive 63 can be filled into the passage trace of the sphere 62 between the shaft portion 60 and the inner peripheral surface of the hole 20.
Thus, the connection between the bridge 6 and the lens 2 is completed. The other parts (A, C, D) are connected in the same manner, and glasses are assembled.

The present invention can assume various modifications.
In the example of FIG. 6A, instead of the groove 61 of the previous embodiment, a hole 63 into which the sphere 62 is fitted is formed in the shaft portion 60. The diameter and depth of the hole 63 are the same as those of the groove 61 of the previous embodiment. That is, the diameter of the hole 63 is the same as or slightly smaller than the sphere 62, and the depth is slightly larger than the radius r of the sphere 62. Although the number of the holes 63 may be one, it is preferable to form two or three (three in the illustrated example) on the outer peripheral surface of the shaft portion 60 at equal intervals.
In this example, a concave fitting groove 21 into which the sphere 62 is fitted is formed inside the hole 20 of the lens 2. Further, at least one guide groove 22 for guiding the sphere 62 is formed from the opening portion of the hole 20 to the fitting groove 21. The guide groove 22 guides at least one of the spheres 62 straight up to the fitting groove 21. The depth of the guide groove 22 is sufficiently shallower than the portion of the sphere 62 protruding from the hole 63.
Then, when the shaft portion 60 and the sphere 62 are press-fitted into the hole 20 of the lens 2 until the bridge 6 comes into contact with the surface of the lens 2, the sphere 62 is fitted into the fitting groove 21 to complete the connection structure.

In the example of FIG. 6B, two right and left shaft portions 60 similar to those in FIG.
In the lens 2, two holes 20 similar to those in the previous embodiment may be formed in accordance with the arrangement of the shaft portions 60, but in the example shown in FIG. 6B, the two shaft portions 60 are formed. One long hole 20 'that can be press-fitted is formed.

In the above embodiment, both the shaft portion 60 and the hole 20 are described as circular or elongated holes. However, as shown in FIG. 6C, the shaft portion 60 and the hole 20 may be rectangular, elliptical, or triangular. It may be a shape or a polygonal shape.
The rotation of the bridge 6 and the like with respect to the lens 2 can be more effectively regulated by forming the shaft portion 60 ″ and the hole 20 ″ to have a square shape.

Although a preferred embodiment of the present invention has been described, the present invention is not limited to the above-described embodiment.
For example, in the example of FIG. 6A, a groove (fitting groove 21) is formed as a fitting portion inside the hole 20, but a hole fitting with the sphere 61 may be used.
Further, in the present invention, the sphere is preferably harder than the other part (lens in the above example) having a hole into which the sphere is fitted, but the other part is made of a material harder than the sphere, Even if it is a highly brittle material such as glass, a cylindrical body made of a soft metal or resin such as brass is fitted and fixed in the hole formed in the other part. The present invention can be applied by fitting the sphere into the hole of the body.

  The present invention can be mainly applied to the connecting portion of the lens and the lens and the lens and the bridge, but can also be applied to the connection of components of other portions.

It is a schematic perspective view of the two-point spectacles to which the connection structure concerning one Embodiment of this invention is applied. 1A is an exploded view of the connection structure, FIG. 2B is a state in which a sphere is held in a groove of the shaft portion, and FIG. 3C is a hole in the shaft portion and the sphere. It is a partial expansion perspective view which shows a state when it press-fits in and connects the bridge | bridging to the lens. It is sectional drawing which shows the relationship between a groove | channel and a spherical body. It is sectional drawing which shows the state which press-fitted the axial part and the spherical body to the hole of the lens, and completed the connection. It is sectional drawing explaining a mode that an adhesive agent is filled between the axial part and the internal peripheral surface of a hole. The present invention is a perspective view for explaining various modifications.

2 Lens 20, 20 ″ hole 20 ′ long hole 21 groove 3 to 5 temple 6 bridge 60, 60 ″ shaft portion 61 groove 62 sphere 63 hole

Claims (6)

It is a connecting structure of the parts constituting the glasses,
At least one shaft formed on one part;
A hole formed in the other part, having the same inner diameter as the outer diameter of the shaft, and into which the shaft is inserted;
A groove-shaped or hole-shaped engaging portion formed on the outer peripheral surface of the shaft portion;
Having at least one sphere engaged with the engaging portion;
Press-fitting the shaft portion into the hole in a state where the sphere is held by the engaging portion;
A structure for connecting eyeglass parts characterized by the above. 2. The connecting structure for spectacle parts according to claim 1, wherein the one part is a wisdom or a bridge, and the other part is a lens. The portion of the sphere protruding from the outer peripheral surface of the shaft body when the sphere is engaged with the engaging portion is smaller than the radius of the sphere. Connecting structure for eyeglass parts as described in 1. The structure for connecting spectacle parts according to any one of claims 1 to 3, wherein the sphere is held by the engaging portion via an adhesive. The connecting structure for spectacle parts according to any one of claims 1 to 4, wherein a groove-like or concave fitting portion that fits the sphere is formed on an inner peripheral surface of the hole. When an adhesive is applied to the base of the shaft portion and the shaft portion is press-fitted into the hole portion, the adhesive fills a gap between the shaft portion and the inner peripheral surface of the hole in accordance with the press-fitting operation. The structure for connecting spectacle parts according to any one of claims 1 to 5, wherein the connecting structure is used.

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