JPH07140423A - Spectacles - Google Patents

Abstract

PURPOSE:To provide spectacles with which boring to lenses liable to generate craze, crack, etc., is avertable, attaching and detaching of lenses and temples are easy, safety is assured and appearance is good without increasing weights, accessories, etc. CONSTITUTION:These spectacles consist of the lenses 1, the temples 2, keepers (first engaging parts) 3 fixed to the outer peripheral edges of the lenses 1 and attachments (second engaging parts) 4 engaged freely attachably and detachably with the keepers 3 disposed at one end of the temples 2. These attachments 4 are composed of case parts 4a formed of nonmagnetic materials having a U shape in section, a pair of yoke parts 4b fixed to both opposite inside surfaces at the bottoms of the case parts 4a and magnet parts 4c interposed between the yoke parts 4b. The keepers 3 are fitted into the apertures of the case parts 4a and are composed of magnetic materials forming a magnetic circuit MC by contact of both side edge parts with a pair of the yoke parts 4b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to eyeglasses worn for correcting eyesight and protecting eyes from ultraviolet rays and the like.

[0002]

2. Description of the Related Art Frameless glasses shown in FIG. 14 are known as conventional glasses. This spectacle includes a lens 21 and a temple 22, and a bolt screw 24 is screwed into a screw hole 23 a of a mounting member 23 provided at the tip of the temple 22 and a mounting hole 21 a provided in the peripheral portion of the lens 21. As a result, both are assembled together.

Also, part-time spectacles as shown in FIG. 15 are known. This spectacle has a front frame 31 and a rear frame 32.
The lenses 33 and 34 respectively held in the front and rear are arranged in double in the front and rear, and the front frame 31 is swingably attached by the hinge 35 attached to the upper part of the rear frame 32, and if necessary, The front frame 31 is used by moving it up and down. In addition, front-wearing sunglasses as shown in FIGS. 16 and 17 are known. This sunglasses has a spring-like metal attachment member 42 or clip 52 attached to the lens portions 41 and 51.
Is fixed to eyeglasses (not shown), and the lens units 41 and 51 are moved up and down as needed to be used.

[0004]

However, the above-mentioned FIG.
In the case of the spectacles shown in (1), since the lens 21 is formed of a relatively high hardness brittle material such as glass or reinforced plastic and is formed into a curved surface, it is necessary to perform a drilling process when forming the mounting hole 21a with a drill or the like. There is a problem that it is difficult and that brittle fracture such as cracks or cracks easily occurs. Further, even when the bolt screw 24 is tightened, there is a risk that the axial stress applied to the lens 21 by the bolt screw 24 may cause brittle fracture such as cracks or breaks in the lens 21.

For the spectacle wearer, a lens type and a power corresponding to various uses are required in consideration of the visual function and the viewing distance, and it is preferable that the lens 21 can be replaced. However, in the case of the above-mentioned conventional eyeglasses, since the lens 21 and the mounting member 23 are screwed together via the small bolt screw 24, a dedicated jig is required to operate the bolt screw 24, and the lens 21 is simple. Can not be replaced. Further, although dust and the like are likely to be collected in the assembled portion of the lens 21 and the mounting member 23, it is difficult to surely wash the dust and the like in the assembled state.

When sports such as wearing glasses as shown in FIGS. 14 and 15, the lenses 21, 33, 34 and the temple 22 are prevented from being damaged or deformed by some strong impact. Therefore, there is a demand for ensuring safety by acting as a cushion absorber that absorbs shocks and by removing it. On the other hand, in the case of the apron-type sunglasses as shown in FIGS. 16 and 17, it is desired that the sunglasses have a good appearance together with the design of the spectacle body, and that the weight and accessories are not increased.

The present invention has been devised in view of the above-mentioned problems. It is possible to avoid the process of making holes in a lens which is prone to cracks and breaks, and to easily attach and detach the lens and the temple, and It is an issue to be solved to secure safety and provide spectacles that have good appearance without an increase in weight and accessories.

[0008]

In order to solve the above problems, the present invention provides a lens, a temple, a first engaging portion fixed to an outer peripheral edge portion of the lens, and the first side provided on the temple side. A second engaging portion that removably engages with one engaging portion, at least one of the first engaging portion and the second engaging portion has a permanent magnet, and the other together with the permanent magnet has a magnetic circuit. The structure is adopted that has a magnetic body that forms.

The lens in the present invention refers to a light-transmissive lens made of glass, reinforced plastic or the like regardless of whether or not there is a degree for adjusting visual acuity and whether or not there is coloring. In addition, the left and right lenses are integrally formed, and the left and right lenses each have a frame-shaped frame attached to the outer peripheral edge. As a preferred aspect of the first engaging portion and the second engaging portion in the present invention, one of them may have a concave portion having one end opened, and the other may have a convex portion fitted into the concave portion.

In this case, the recess is formed between a case portion formed of a non-magnetic material having a U-shaped cross section, a pair of yoke portions fixed to the inner surfaces of the bottom of the case portion which face each other, and the yoke portion. The protrusion may be formed of an interposing magnet portion, and the protrusion may be formed of a magnetic body that is fitted into the opening of the case portion and that has a pair of yoke portions contacting both side edge portions to form a magnetic circuit.

Further, the concave portion is a case portion formed of a dome-shaped non-magnetic material, and a pair of yokes having an arcuate cross section having a concave spherical surface on the inner periphery which is fixed on both sides of the inner peripheral surface of the case portion with a space therebetween. A magnetic body having a spherical portion that forms a magnetic circuit by spherically contacting the concave spherical surfaces of the pair of yoke portions, the magnetic body having a spherical portion and a magnet portion having an arcuate cross section interposed between the yoke portions. Can be configured to consist of

Further, the recess is a case portion formed of a non-magnetic material having a cylindrical shape with a bottom, and a flat magnet portion arranged so as to divide the internal space into two at the center of the bottom portion of the case portion, The yoke portion is formed by joining to one surface of the magnet portion and being divided into two inner spaces and arranged so as to project from the magnet portion. The convex portion is fitted into the opening of the case portion. And a magnetic body that extends from one side of the tip surface of the shaft portion and is fitted into the other internal space divided into two and abuts the other side surface of the magnet portion. And a protrusion.

Further, either one of the first engaging portion and the second engaging portion is overlapped between a pair of flat plate-shaped yoke portions and the yoke portions to form a space portion at one side portion of the yoke portions. It is possible to adopt a configuration in which a magnetic body is formed of a flat plate-shaped magnet portion to be formed, and the other has a magnetic body that abuts the side surfaces of the pair of yoke portions on the side of the space portion and forms a magnetic circuit with the yoke portions.

[0014]

In the spectacles of the present invention, a magnetic circuit is formed between the permanent magnet and the magnetic body by joining the first engaging portion on the lens side and the second engaging portion on the temple side, and a magnetic circuit is formed. The suction force causes the first engaging portion and the second engaging portion to engage with each other to be connected and fixed. In this state, the first engaging portion and the second engaging portion are firmly joined by the attraction force of the magnetic circuit, and the joining is not released even by an impact that the eyeglasses can receive on a daily basis during use.

On the other hand, when the eyeglasses are not used, if a large force is applied to the eyeglasses due to an impact that can be received on a daily basis, a crack is generated in the loop of the magnetic circuit and the suction force is extremely weakened. The first engaging portion and the second engaging portion are easily disengaged to separate the lens from the temple. Therefore, the lens and the temple can be easily attached / detached without using a dedicated jig or the like, and the lens and the temple can be easily cleaned in a state in which they are separated. Further, when some kind of strong impact is applied during wearing of the eyeglasses, the first engaging portion and the second engaging portion are disengaged from each other to avoid damage or deformation of the lens and the temple, thereby ensuring safety.

Further, the first engaging portion and the second engaging portion are configured to engage with each other by a magnetic attractive force,
Since bolts and the like are not used, it is not necessary to drill holes in the lens that are prone to cracks and breaks. Further, since the first engaging portion and the second engaging portion can have a large magnetic attraction force and can be formed of a small and lightweight member, the weight and accessories are not increased and the appearance is good. .

[0017]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a partial perspective view of eyeglasses according to the present embodiment, and FIG. 2 is a sectional view of an engaging portion in its engaged state.

In the spectacles of this embodiment, a pair of left and right lenses (only the left lens is shown in the figure) 1, a pair of left and right temples (only the left temple is shown in the figure) 2, and the outside of the lens 1. Keeper (first engaging portion) 3 fixed to the outer peripheral surface
And an attachment (second engagement portion) 4 provided at the tip of the temple 2 and engaged with the keeper 3 as main elements.

The pair of left and right lenses 1 are each made of glass in a predetermined shape, and are connected and fixed by a nose pad support member 1a located between them. Temple 2
Is composed of a metal rod-shaped base portion and a resin-shaped ear pad portion that is connected to one end of the base portion and is substantially L-shaped. Keeper 3 is SP
It is made of CC (cold rolled steel) in a plate shape with a length of 10 mm, a width of 2 mm and a thickness of 1.5 mm. One side surface of the keeper 3 is fixed to an outer position of the outer peripheral surface of the lens 1 with an epoxy adhesive, a nylon thread, or a metal thread.

The attachment 4 comprises a case portion 4a, a pair of yoke portions 4b, and a magnet portion 4c. The case portion 4a is made of austenitic stainless steel (nonmagnetic material) having a plate thickness of 0.5 mm and has a U-shaped cross section.
The size is 10 mm in length, 3 mm in outer width, and 4 mm in height. The yoke portion 4b is formed by SPCC into a plate shape having a length of 10 mm, a width of 2 mm, and a thickness of 0.6 mm, and is fixed to both inner surfaces of the bottom of the case portion 4a that face each other. Magnet part 4c
Is an Nd-based anisotropic sintered magnet (BHmax = 35 MG) formed in a plate shape having a length of 10 mm, a width of 1.8 mm and a thickness of 0.8 mm.
Oe), the bottom surface of the case portion 4a and both yoke portions 4b.
It is interposed between the two yoke portions 4b while being joined to the inner surface of the. Since the width of the magnet portion 4c is slightly smaller (0.2 mm) than the width of the yoke 4b, the surface of the magnet portion 4c on the opening side of the case portion 4a is slightly recessed from the surface of both yokes 4b. A space 4d is formed in that portion. The attachment 4 configured in this manner is fixed to the tip of the temple 2 via an L-shaped mounting bracket 4e fixed to the outer peripheral surface of the case portion 4a.

When using the spectacles of the present embodiment having the above-described structure, when the keeper 3 on the lens 1 side is fitted into the opening of the case 4a of the attachment 4 during use, both side edge portions of the outer surface of the keeper 3 are replaced. A loop-shaped magnetic circuit MC passing through the magnet portion 4c, both yoke portions 4b, and the keeper 3 is formed in contact with the side surface of the yoke portion 4b. This magnetic circuit MC
The keeper 3 and the two yoke portions 4b are firmly joined by the magnetic attraction force, and the temple 2 is assembled to the lens 1 to be ready for use. In this state, the joint is not released by the impact that the eyeglasses can receive on a daily basis during use.

On the other hand, when the spectacles are not used, a large force can be applied manually by an impact that the spectacles can receive on a daily basis, so that the magnetic circuit MC is perpendicular to the joint surface so as to be sheared. If human power is applied in any direction, the magnetic circuit M
A crack is generated in the loop of C, the suction force is extremely weakened, the keeper 4a and both yoke portions 4b are easily separated, and the temple 2 and the lens 1 are separated.

Therefore, according to the spectacles of this embodiment, the lens 1 and the temple 2 are separated by the attractive force of the magnetic circuit MC formed by the keeper 3 on the lens 1 side, the magnet portion 4c and the yoke portion 4b on the temple 2 side. Since they are configured to engage with each other, the lens 1 and the temple 2 can be easily attached and detached. As a result, when dust or the like is accumulated in the engaging portion between the keeper 3 and the attachment 4, the cleaning can be easily performed in a state where the dust and the like are separated.

Further, when some kind of strong impact is applied while wearing the spectacles, the keeper 3 and the attachment 4 are disengaged from each other, so that the damage and deformation of the lens 1 and the temple 2 can be avoided, and the safety is secured. . Further, the eyeglasses of the present embodiment are configured so that the lens 1 and the temple 2 are assembled by forming the magnetic circuit MC without using a bolt screw or the like as in the conventional case, so that it is difficult. Moreover, the lens 1 which is easily cracked or broken
It is possible to avoid the hole drilling process.

Further, the keeper 3 and the attachment 4 in this embodiment are lightweight and compact while ensuring a large magnetic attraction force, so that the weight and accessories are not increased and the appearance is good. In the glasses of this embodiment, the keeper 3 and the attachment 4 are arranged in the vertical direction with respect to the lens 1. However, like the glasses shown in FIG.
It may be arranged laterally with respect to A.

(Embodiment 2) FIG. 4 is a front view of an engaging portion of eyeglasses according to this embodiment in an engaged state, and FIG. 5 is an IV of FIG.
FIG. 4 is a sectional view of a portion corresponding to line IV. The eyeglasses of this embodiment are different from those of the first embodiment in the structure of the first engaging portion and the second engaging portion, and therefore the different points will be mainly described. In addition,
Since the lens and temple of this embodiment are the same as those of the first embodiment, the same reference numerals are used and detailed description is omitted.

The keeper (first engaging portion) 5 has a shaft portion 5a,
And a spherical portion 5b provided at the tip of the shaft portion 5a, S
It is integrally formed of PCC (cold rolled steel).
In the keeper 5, the side peripheral surface of the shaft portion 5a is fixed to the outer side position of the outer peripheral surface of the lens 1 with an epoxy adhesive, a nylon thread, or a metal thread. The attachment (second engaging portion) 6 includes a case portion 6a, a pair of yoke portions 6b,
It is composed of a magnet portion 6c. The case portion 6a is formed of austenitic stainless steel in a hemispherical dome shape. The case portion 6a is formed in parallel on both sides of the inner peripheral portion and has a spacer portion 6d, and an inner space portion having a semicircular cross section is formed between the both spacer portions 6d. The yoke portion 6b has an inner peripheral surface of a concave spherical surface that matches the outer peripheral surface of the spherical portion 5b of the keeper 5, and is formed in an arc-shaped cross section by SPCC. The yoke portions 6b are arranged on both sides of the opening of the inner space portion of the case portion 6a, and are fixed to the inner peripheral surfaces thereof. The magnet portion 6c is an Nd-based anisotropic sintered magnet (B
Hmax = 35 MGOe). The magnet portion 6c is fixed to the inner peripheral surface at the center of the inner space portion of the case portion 6a with both side surfaces joined to the pair of yoke portions 6b. The inner peripheral surface of the magnet portion 6c is the spherical portion 5 of the keeper 5.
It is located at a position recessed from the inner peripheral surfaces of the pair of yoke portions 6b so as not to be joined to the outer peripheral surface of b. In the attachment 6 thus configured, the outer peripheral surface of the case portion 6a is fixed to the tip of the temple 2.

In the spectacles of the present embodiment having the above-described structure, the spherical portion 5b of the keeper 5 on the lens 1 side is brought close to the inner space of the case portion 6a of the attachment 6 so that the outer peripheral surfaces of the spherical portion 5b have both sides. When abutting on the inner peripheral surface of the yoke portion 6b, a loop-shaped magnetic circuit MC passing through the magnet portion 6c, both yoke portions 6b and the spherical portion 5b is formed. Due to the magnetic attraction of the magnetic circuit MC, the spherical portion 5b and the two yoke portions 6b are firmly joined together, and the temple 2 is assembled to the lens 1 so that the lens 1 is ready for use.

In this state, since the spherical portion 5b and both yoke portions 6b are firmly joined by the attraction force of the magnetic circuit MC, the joining can be released by an impact that the eyeglasses can receive on a daily basis. However, since the spherical portion 5b and the two yoke portions 6b are in spherical contact, they can be slid in the 360 ° direction by a certain amount of human force. Therefore, the temple 2 is attached to the lens 1 to adjust the mounting angle of the temple 2 according to the person wearing the glasses, or when the glasses 2 are not worn.
Can be folded to the lens 1 side.

If a large amount of human power is applied so that the joint surface between the spherical portion 5b and both yoke portions 6b is separated,
A crack is generated in the loop of the magnetic circuit MC, the suction force is extremely weakened, the spherical portion 5b and both yoke portions 6b are easily separated, and the temple 2 is removed from the lens 1. As described above, in the eyeglasses of the present embodiment, in addition to the effect obtained in the first embodiment, the spherical portion 5 of the keeper 5 fixed to the lens 1 side.
Since b and the yoke portion 6b of the attachment 6 fixed to the temple 2 are in spherical contact,
Both can be slid in a state of being joined by the attraction force of the magnetic circuit MC, and the effect that the attachment angle between the lens 1 and the temple 2 can be adjusted and the temple 2 can be folded down is also obtained.

(Embodiment 3) FIG. 6 is an exploded perspective view of an essential part of eyeglasses according to this embodiment, and FIG. 7 is a perspective view of an engaging portion in a state immediately before its engagement. FIG. 8 is a sectional view of the engaging portion in the engaged state. The eyeglasses of this embodiment are the same as those of the first embodiment.
Since the structures of the first engaging portion and the second engaging portion are different from those of the above, different points will be mainly described. The lenses and temples of this embodiment are the same as those of the first embodiment, so the same reference numerals are used and detailed description is omitted.

The attachment (first engaging portion) 7 has a cubic mounting base portion 7a, a bottomed cylindrical case portion 7b, and
It is composed of a plate-shaped magnet portion 7c and a semi-cylindrical yoke portion 7d. One surface of the mounting base 7a is fixed to an outer position of the outer peripheral surface of the lens 1 with an epoxy adhesive, a nylon thread, or a metal thread. The case portion 7b is made of austenitic stainless steel and has a bottomed cylindrical shape with an inner diameter of 2 mm and a depth of 5 mm. The case portion 7b is the mounting base portion 7
The mounting base 7a is planted so that an opening is opened on the surface corresponding to the back surface of the lens 1 of a.

The magnet portion 7c has a length of 1.8 mm and a width of 0.6 m.
It is composed of an Nd-based anisotropic sintered magnet (BHmax = 35 MGOe) formed in a plate shape with m and a thickness of 1.8 mm. The magnet portion 7c is arranged at the center of the bottom of the case portion 7a so as to divide the internal space into two parts, and the side surfaces on three sides are arranged in the case portion 7a.
It is fixed to the bottom surface of a and the inner peripheral surface facing it. The yoke portion 7d has a length of 1.8 mm and a width of 0.7 mm according to SPCC.
It is shaped like a kamaboko with a height of 2.0 mm. The yoke portion 7d is disposed in one of the semi-cylindrical spaces formed between the inner peripheral surface of the case portion 7a on both sides of the magnet portion 7c, and is joined to one surface of the magnet portion 7c. And case part 7
It is fixed to the inner peripheral surface and the bottom surface of a. Since the yoke portion 7d is formed to be 0.2 mm longer than the magnet portion 7c, the yoke portion 7d projects more than the magnet portion 7c.

The keeper (second engaging portion) 8 has a shaft portion 8 having an outer diameter matching the inner diameter of the case portion 7b of the attachment 7.
a and a protruding portion 8b extending from one side of the tip surface of the shaft portion 8a.
And both are integrally formed by SPCC. The protruding portion 8b is the yoke portion 7d of the attachment 7.
It is formed in the same shape as the fish cake. This keeper 8
The rear end surface of the shaft portion 8a is fixed to the front end surface of the temple 2 by an epoxy adhesive or welding so as to extend from the front end of the temple 2.

In the eyeglasses of this embodiment having the above-described structure, the keeper 8 provided at the tip of the temple 2 is inserted into the case portion 7a of the attachment 7 provided on the lens 1 side, and the keeper 8 is projected. The portion 8b is fitted into the semi-cylindrical space formed on the side opposite to the yoke portion 7d. As a result, the protruding portion 8b is joined to the magnet portion 7c, and the end surface of the shaft portion 8a is joined to the end surface of the yoke portion 7d.
A loop-shaped magnetic circuit MC that passes through c, the yoke portion 7d, the shaft portion 8a, and the protruding portion 8b is formed. Due to the magnetic attraction of the magnetic circuit MC, the attachment 7 and the keeper 8 are firmly engaged with each other, and the temple 2 is attached to the lens 1 to be ready for use.

On the other hand, when the spectacles are not used, if the temple 2 is pulled by a large human force even if the spectacles are subjected to a daily impact, the magnetic circuit MC is formed at the joint surface between the shaft portion 8a and the yoke portion 7d. The loop is cracked, the suction force is extremely weakened, the attachment 7 and the keeper 8 are easily separated, and the temple 2 is removed from the lens 1. Therefore, also in the case of the glasses of this embodiment, the lens 1 and the temple 2
The same effects as in the case of the first embodiment can be obtained such that the and can be easily attached and detached.

(Embodiment 4) FIG. 9 is a front view of an engaging portion of eyeglasses according to this embodiment in an engaged state, and FIG. 10 is a plan view thereof. The eyeglasses of this embodiment are different from those of the first embodiment in the structure of the first engaging portion and the second engaging portion, and therefore the different points will be mainly described. The lenses and temples of this embodiment are the same as those of the first embodiment, so the same reference numerals are used and detailed description is omitted.

The keeper (first engaging portion) 9 is composed of a holding portion 9a formed by SPCC in a substantially hourglass-shaped plate shape and a guide member 9b formed by austenitic stainless steel in a substantially hourglass shape. The guide member 9b has a holding portion 9a.
A substrate 9c having the same shape as that of the substrate 9c and a holding portion 9a integrally superposed on the surface of the substrate 9c;
And a pair of guide walls 9d projecting beyond the surface of the guide wall and extending in a dogleg shape in the longitudinal direction. Each of the guide walls 9d is formed so that the half-plane portion of one guide wall 9d is parallel to the half-plane portion of the other guide wall 9d that does not face the guide wall 9d. As a result, the attachment 10 to be described later, which is joined to the holding portion 9a, can rotate about the central portion thereof within the range of the angle α until it comes into contact with both guide walls 9d. In this keeper 9, the back surface of the substrate 7c is fixed to the outer position of the outer peripheral surface of the lens 1 with an epoxy adhesive, a nylon thread, or a metal thread.

The attachment (second engaging portion) 10 has a pair of flat plate-shaped yoke portions 10b and a pair of yoke portions 10b.
It is composed of a flat plate-shaped magnet portion 10c superposed between them. The yoke portion 10b is formed by SPCC to have a length of 10 mm, a width of 2 mm, and a thickness of 0.6 mm. The magnet portion 10c has a length of 1
It is an Nd-based anisotropic sintered magnet (BHmax = 35MGOe) formed to have a width of 0 mm, a width of 1.8 mm, and a thickness of 0.8 mm, and yoke portions 10b are adhered to both surfaces thereof with an epoxy adhesive or welding. It is fixed. Since the width of the magnet portion 10c is narrower than the width of the yoke 10b by 0.2 mm, one side surface of the magnet portion 10c is slightly recessed from the surfaces of both yokes 10b, and the space portion 10d is formed in that portion. Has been formed. The attachment 10 configured as described above is provided with the space portion 10 so as to intersect with the temple 2 in a T shape.
The central portion of the surface opposite to d is fixed to the side surface of the tip portion of the temple 2.

In the spectacles of the present embodiment having the above-described structure, when the space portion 10d side of the attachment 10 is inserted between both guide walls 9d of the keeper 9, the side surfaces of both yoke portions 10b are the surface of the holding portion 9a. To form a loop-shaped magnetic circuit MC passing through the magnet portion 10c, both yoke portions 10b, and the holding portion 9a. Due to the magnetic attraction of the magnetic circuit MC, the holding portion 9a and the two yoke portions 10b are firmly joined to each other, and the temple 2 is assembled to the lens 1 and is ready for use.

When the spectacle wearer wants to adjust the mounting angle between the lens 1 and the temple 2 in this state, the attachment 10 is swung by appropriately manipulating a certain amount of human power around the central portion of the attachment 10. It slides along the surface of the holding portion 9a in a state of being bonded to the holding portion 9a.
The swing of the attachment 10 causes the attachment 10 to move.
It is possible within the range of the angle α until the both side surfaces of the abutting contact the guide walls 9d.

If a large amount of human power is applied so that the joint surface between the holding portion 9a and both yoke portions 10b is separated, the holding portion 9a and both yoke portions 10b are easily separated,
The temple 2 is removed from the lens 1. As described above, in the eyeglasses of this embodiment, in addition to the effect obtained in the first embodiment, the holding portion 9b of the keeper 9 in which the yoke portion 10b of the attachment 10 fixed to the temple 2 side is fixed to the lens 1 side. Since it is configured to be slidable along the surface of the lens within the range of the angle α, it is possible to obtain an effect that the attachment angle between the lens 1 and the temple 2 can be adjusted according to the spectacle wearer.

(Embodiment 5) FIG. 11 is an overall perspective view of eyeglasses according to this embodiment, and FIG. 12 is a sectional view of an engaging portion in its engaged state. The eyeglasses of this embodiment include a lens 11 in which a pair of left and right lens portions are integrally formed, and a frame 12.
a pair of left and right temples 12 connected via a, a keeper (first engaging portion) 13 provided on the lens 11 side, and a pair of left and right attachments fixed to the frame 12a and engaging with the keeper 13 (second (Engagement portion) 14 as a main element.

The lens 11 is integrally formed of reinforced plastic, and has an attachment base 11a at its upper portion, which is bent substantially at a right angle to the back surface and extends along the upper side.
The pair of left and right temples 12 are foldably connected to both ends of a frame 12a formed in a U shape through hinges 12b. Further, on the inner surface of the frame 12a, a pair of left and right nose pad support members 12 extending to the central portion are provided.
c is attached.

The keeper 13 has a length of 10 m according to SPCC.
It is formed in a long plate shape of m, width 1.8 mm, and thickness 0.6 mm. One surface of the keeper 13 is fixed to the inner surface of the mounting base 11a of the lens 11 by brazing. The attachment 14 includes a pair of yoke portions 14 formed in a plate shape.
a and a plate-shaped magnet portion 1 interposed between both yoke portions 14a
4b and. The yoke portion 14a is formed by SPCC into a plate shape having a length of 5 mm, a width of 2 mm, and a thickness of 0.6 mm. The magnet portion 14b has a length of 5 mm, a width of 1.8 mm, and a thickness of 0.
Nd-based anisotropic sintered magnet (BHm
ax = 35MGOe). Since the width of the magnet portion 14b is smaller than the width of the yoke 14a by 0.2 mm, a space portion 14c is formed on one side surface of the attachment 14. Attachment 1 configured in this way
4 is the frame 12a so that the space portion 14c is on the upper side.
It is fixed to the inner surface of the by brazing.

In the spectacles of this embodiment constructed as described above, the mounting base 11a of the lens 11 is positioned above the frame 12a of the temple 12, and the keeper 13 provided on the mounting base 11a is mounted on the temple 12 side. When it is brought close to the attachment 14 of the
A loop-shaped magnetic circuit MC is formed which is joined to the upper surface of 4a and passes through the magnet portion 14b, the yoke portion 14a and the keeper 13. By the magnetic attraction of this magnetic circuit MC, the keeper 1
3 and the attachment 14 are firmly engaged, and the lens 11
The temple 12 and the temple 12 are assembled and ready for use.

On the other hand, if the lens 11 and the temple 12 are separated from each other by a large amount of human force even if the eyeglasses are subject to a daily impact, the loop of the magnetic circuit MC is cracked at the joint surface between the keeper 13 and each yoke portion 14a. Occurs, the suction force is extremely weakened, the keeper 13 and the attachment 14 are easily separated, and the lens 11 and the temple 12 are removed. Therefore, even in the case of the eyeglasses of this embodiment, the lens 11 and the temple 12 can be easily attached and detached, and the like.
The same effect as in the case of can be obtained.

In the eyeglasses of this embodiment, the front-mounted lens 11 is detachably attached to the temple 12 having no lens. As shown in FIG. 13, the temple 12 is attached to the frame 11A on the temple 12 side. In contrast to the one having the lens 11B held, the front-mounted lens 1 as in this embodiment
1C may be detachably attached.

[0049]

According to the spectacles of the present invention, the lens, the temple, the first engaging portion fixed to the outer peripheral edge of the lens, and the first engaging portion which is provided on the temple side and is detachable from the first engaging portion. A second engaging portion that freely engages, at least one of the first engaging portion and the second engaging portion has a permanent magnet, and the other is a magnetic body that forms a magnetic circuit together with the permanent magnet. Since it has the structure, it is possible to avoid the drilling of the lens, which is likely to be cracked or broken, and it is possible to easily attach / detach the lens and the temple manually without using a dedicated jig or the like. Further, when some kind of strong impact is applied while wearing the glasses, the first engaging portion and the second engaging portion are disengaged from each other, so that the damage and the deformation of the lens and the temple can be avoided, so that the safety can be secured. Furthermore, by separating the lens and the temple, it is possible to easily wash dust and the like that tend to collect in the engaging portion. Further, since the first engaging portion and the second engaging portion can have a large magnetic attraction force and can be formed of a small and lightweight member, the weight and accessories are not increased and the appearance is good. .

[Brief description of drawings]

FIG. 1 is a partial perspective view of eyeglasses according to a first embodiment.

FIG. 2 is a cross-sectional view of an engaging portion of the glasses according to the first embodiment in an engaged state.

FIG. 3 is a partial perspective view showing a modified example of the eyeglasses according to the first embodiment.

FIG. 4 is a front view of an engagement portion in an engaged state of eyeglasses according to a second embodiment.

5 is a cross-sectional view of a portion corresponding to line IV-IV in FIG.

FIG. 6 is an exploded perspective view of a main part of eyeglasses according to a third embodiment.

FIG. 7 is a perspective view of an engagement portion of the eyeglasses according to the third embodiment in a state immediately before engagement.

FIG. 8 is a cross-sectional view of an engaging portion of the glasses according to the third embodiment in an engaged state.

FIG. 9 is a front view of an engaging portion in an engaged state of eyeglasses according to a fourth embodiment.

FIG. 10 is a plan view of the engagement portion of the glasses according to the fourth embodiment in an engaged state.

FIG. 11 is an overall perspective view of eyeglasses according to a fifth embodiment.

FIG. 12 is a cross-sectional view of an engaging portion of an eyeglass according to a fifth embodiment in an engaged state.

FIG. 13 is an overall perspective view showing a modified example of the eyeglasses according to the fifth embodiment.

FIG. 14 is a cross-sectional view of a connecting portion between a lens and a temple of conventional frameless glasses.

FIG. 15 is a cross-sectional view of a connecting portion between a lens and a temple of conventional part-time spectacles.

FIG. 16 is a perspective view of conventional front-mounted sunglasses.

FIG. 17 is a perspective view of conventional front-mounted sunglasses.

[Explanation of symbols]

1, 11 ... Lens 2, 12 ... Temple 3, 5, 9, 13 ... Keeper (first engaging part) 4, 6, 10, 14 ... Attachment (second engaging part) 4a, 6a, 7b ... Case part 4b, 6b, 7d, 10b, 14a ... Yoke part 4c, 6c, 7c, 10c, 14b ... Magnet part 7 ... Attachment (first engaging part) 8 ... Keeper (second engaging part)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takashi Yokoyama, No. 1 Wanowari, Arao-cho, Tokai-shi, Aichi Aichi Steel Co., Ltd. (72) Saeko Uchida 6-6-11 Hirai, Okayama, Okayama Prefecture In the laboratory

Claims (6)

[Claims] 1. A lens, a temple, a first engaging portion fixed to an outer peripheral edge portion of the lens, and a second engaging member provided on the temple side and detachably engaged with the first engaging portion. A pair of eyeglasses, wherein at least one of the first engaging portion and the second engaging portion has a permanent magnet, and the other has a magnetic body that forms a magnetic circuit together with the permanent magnet. 2. The spectacles according to claim 1, wherein one of the first engaging portion and the second engaging portion has a concave portion having one end opened, and the other has a convex portion fitted into the concave portion. 3. The recess is a case portion formed of a non-magnetic material having a U-shaped cross section, a pair of yoke portions fixed to the inner surfaces of the bottom of the case portion facing each other, and interposed between the yoke portions. The eyeglasses according to claim 2, wherein the convex portion is formed of a magnetic body that is fitted into the opening of the case portion, and both side edge portions of the pair of yoke portions are in contact with each other to form a magnetic circuit. . 4. A pair of yokes each having an arcuate cross section, wherein the recessed portion is formed of a dome-shaped non-magnetic material, and a concave spherical surface is formed on the inner periphery of the case portion so as to be fixed on both sides of the inner peripheral surface thereof. A magnetic body having a spherical portion that forms a magnetic circuit by spherically contacting the concave spherical surfaces of the pair of yoke portions, the magnetic body having a spherical portion and a magnet portion having an arcuate cross section interposed between the yoke portions. The spectacles according to claim 2, comprising: 5. The recess is a case portion formed of a non-magnetic material having a cylindrical shape with a bottom, a flat magnet portion disposed so as to divide the internal space into two at the center of the bottom of the case portion, The yoke portion is formed by joining to one surface of the magnet portion and being divided into two inner spaces and arranged so as to project from the magnet portion. The convex portion is fitted into the opening of the case portion. And a magnetic body that extends from one side of the tip surface of the shaft portion and is fitted into the other internal space divided into two and abuts the other side surface of the magnet portion. The spectacles according to claim 2, comprising a protrusion. 6. One of the first engaging portion and the second engaging portion is overlapped between a pair of flat plate-shaped yoke portions and the yoke portions to form a space portion on one side portion of the yoke portions. The eyeglasses according to claim 1, comprising a flat plate-shaped magnet portion to be formed, and the other has a magnetic body that abuts on a side surface of the pair of yoke portions on the side of the space portion and forms a magnetic circuit with the yoke portions.