JP4202082B2 - Glasses frame - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a spectacle frame in which a temple of a spectacle is provided with elasticity. Specifically, the temple is divided into a front part and a rear part, and the temple (rear part) can be opened wider than the natural state, and the rear part can appropriately tighten the temporal region by pressing force. Regarding the frame.
[0002]
[Prior art]
[Patent Document 1]
Japanese Patent Laid-Open No. 06-160781 [Patent Document 2]
Japanese Patent Laid-Open No. 09-197351 [Patent Document 3]
Japanese Patent Application Laid-Open No. 09-304741 [Patent Document 4]
JP 11-024006 A [Patent Document 5]
Japanese Patent Laid-Open No. 11-052301 [Patent Document 6]
JP 2002-049010 A [Patent Document 7]
Japanese Patent Laid-Open No. 07-318870 [Patent Document 8]
Japanese translation of PCT publication No. 2002-509619
The temple's temples are designed so that when wearing glasses, the temple is slightly opened and the temple end is hooked on the ear. Is preferred. For this reason, the temple is usually given an appropriate elasticity. Nevertheless, a large force tends to be applied to the hinge when the temple is opened and closed. Therefore, it has been proposed that the hinge itself has elasticity for the opening / closing operation. What is called a spring hinge is an example.
[0004]
FIG. 1 shows a structure of a spring hinge using a coil spring. The coil spring j3 is sandwiched between the spring hinge bases, and the frame j112 on the temple j1 side and the frame j210 on the armor j2 side are aligned and screwed together. As a result, the coil spring becomes a source of the elastic force of the temple, and as a result, elastic expansion and appropriate tightening of the temporal region are realized. As an improved type of this structure, there are “glasses frame” (Patent Document 1), “spring hinge of glasses” (Patent Document 2), “hinge with spring mechanism for glasses” (Patent Document 3), and the like.
[0005]
As a thing using a leaf | plate spring instead of a coil spring, "Spring hinge mechanism of glasses" (patent document 4), "Spring hinge glasses" (patent document 5), "Spring type temple of glasses" (patent document 6) )and so on. In the case of a leaf spring, it consists of a pressing material using an elastic material and an end piece that regulates the opening of the pressing material, and when the temple is opened, the elastic force of the pressing material generates a tightening force of the temple (Note : Part names vary by patent).
[0006]
As a temple with a two-stage structure, there is a “glasses frame” (Patent Document 7). This frame consists of an auxiliary temple and a temple body. The auxiliary temple has an attachment mechanism that can rotate at both ends, the attachment part in the front frame direction rotates downward, and the attachment part with the temple body is at an angle of about 90 °. This enables rotation in the lens direction (rotation in the normal opening / closing direction of the temple). Therefore, by adjusting the length of the auxiliary temple, compact folding becomes possible (folding with the temple body in contact with the edge <normal rim> of the glasses is possible). In addition, by embedding a coil spring in the auxiliary temple, the auxiliary temple can be opened at a wider angle with respect to the force in the direction of maintaining the protruding state (the auxiliary temple is standing) and the temple body, In the open state, it generates a force in the inner direction (the direction in which the temple body is folded). The function of the coil spring is basically the same as that of the spring hinge shown in FIG.
[0007]
There is "Spring-type vine for glasses" (Patent Document 8) in the same two-stage temple. In this spring type temple, the temple is composed of a first segment (corresponding to the auxiliary temple) and a second segment (corresponding to the temple body), and one end of the first segment is connected to the armor by a hinge. A temple opening / closing mechanism is formed, and the other end of the first segment is a tapered arch-shaped leaf spring, and is configured to be accommodated in the second segment. The first segment and the second segment can be rotated by attaching the vicinity of the leaf spring root (near the opening of the second segment, the attachment portion of the leaf spring of the first segment) at one point. The leaf springs of the segments can be expanded wider than the width of the temporal region, and the effect of tightening the temporal region after wearing glasses is realized.
[0008]
A supplementary explanation will be given with reference to FIG. In the figure, a first segment j110 and a second segment j120 are connected by a hinge pin j113, and the two segments can be rotated about the hinge pin. The tip j121 of the second segment is hollow, and is partially in contact with the arcuate rod j111 that serves as a spring. If force is applied in the outward direction, it will be wider than the open state (the state where the temple is naturally opened). be able to. If the force in the expanding direction is removed, an appropriate force is applied to the second segment in the inner direction, and the temporal region is pressed. In addition, j112 is a connecting part with the Yoroi and has a frame structure.
[0009]
[Problems to be solved by the invention]
When wearing eyeglasses, the left and right temples are respectively opened substantially at right angles to the eyeglass front frame, and the eyeglasses are stabilized by sandwiching the temple end (ear hook) between the earlobe. However, in the case of glasses that do not have a spring hinge mechanism, when the temple is expanded, an excessive force tends to be applied in the direction toward the outside of the temple. For this reason, a large force is applied to the temple, which causes deformation and breakage of the spectacle frame. In addition, this causes a problem that the temple is wider than the head, and the glasses cannot be stably fixed to the face.
[0010]
In order to solve this problem, the spring hinge mechanism described in the prior art has been devised. The spring hinge mechanism has an elastic spring attached to the armoring part that connects the temple and the spectacle frame (spectacle front frame). The most orthodox mechanism is the method using the coil spring described in the prior art. However, this mechanism has a complicated structure and handles minute parts, so it takes time to assemble and causes high costs.
[0011]
Various mechanisms have been proposed to solve the problems of spring hinges using coil springs. We have seen some examples in the prior art, each with its own function and structure, but some of them are complex or unsatisfactory, so they are not just satisfactory . In light of the above, the problem to be solved by the present invention is to propose a temple structure that has a simple structure, is easy to assemble, and has a spring hinge mechanism that is visually attractive.
[0012]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention described in claim 1 is a spectacle frame including a temple having a structure divided into a front part on the side of the armor and a rear part on the side of the temple end.
(1) The front part on the side of the armor is
The portion facing the rear portion on the temple end side is divided into two forks when mounted, and has a hollow structure,
One end is fixed to the inner side of the hollow structure and the other end is squeezed with a spring pin having a smooth curved tip.
Provided with an external fitting part provided with a fitting hole near the foremost part divided into two forks,
(2) The rear part on the temple end side is
A fitting hole for connecting a portion facing the front part on the side of the armor side in a form that is coaxial and rotatable with a fitting hole provided in the external fitting part,
An internal fitting portion having a cam-like contact surface structure that is curved to enable smooth contact with the spring pin;
A spectacle frame comprising a temple connected coaxially so as to be rotatable in the opening and closing direction of the temple through a fitting hole in the front portion on the end side and the rear portion on the temple end side.
[0013]
In the present invention, a two-stage temple structure composed of a front portion and a rear portion is adopted, and elasticity is produced by using an elastic member, for example, a spring pin, at a connecting portion between the front portion and the rear portion, and a predetermined amount. The spring temple structure can be opened wider than the width. The temple of the two-stage structure of the present invention has a structure in which the front part and the rear part are connected in a rotatable manner. The armor side is called the “front part” and the temple end side is called the “rear part”.
[0014]
The structure of the spectacle frame of the present invention will be described by way of example. A frame is provided at the end of the front part on the end of the armature, and the other end (meaning opposite to the end of the armor, not the most advanced meaning) is divided into two forks into a hollow structure. A fitting hole is provided in the vicinity of the separated leading edge. This will be referred to as an “external fitting portion” in order to distinguish it from the rear fitting portion. The external fitting part is divided into two forks, and two holes are provided to open through holes at each end.
[0015]
On the other hand, a cam hole having a curved shape is provided at the front portion side end of the rear portion to provide a fitting hole for connecting to the external fitting hole in a rotatable manner and to allow smooth contact with the spring pin. The side structure. This fitting hole is referred to as an “internal fitting portion” to distinguish it from an external fitting portion, and the cam-shaped side surface is referred to as a “cam-shaped contact surface”. The rear side, opposite to the internal fitting portion, is an ear hooking portion.
[0016]
Connect the front piece and the Yoroi piece together so that they can be rotated with screws or pins. This connecting part forms a hinge mechanism for normal glasses. The front part and the rear part can be rotated with a screw or a pin, with the internal fitting part sandwiched between the external fitting parts (matching both fitting holes) with the cam-like contact surface in contact with one end of the spring pin stop. Since the cam-shaped contact surface is in contact with the tip of the spring pin, when the temple is opened from the open state (opened approximately 90 °) and further opened outward, the cam-shaped contact surface pushes the spring pin inward (glasses The temple can be further opened from the open state by pushing toward the side of the head when hung. When the force is removed from the above state, the spring pin tip pushes the cam-shaped contact surface outward due to the elastic force (restoring force) of the spring pin, the connecting part (position of the fitting hole) serves as a fulcrum, and the temple end is directed inward. Generates pressing force (pressing force). As a result, the temples can appropriately tighten the temporal region and put the glasses on stably.
[0017]
In the above example, the shape of the spring pin is a line, but if the tip is sharp, the cam-shaped contact surface is damaged or smooth contact cannot be obtained. Therefore, the tip of the spring pin is made to have a smooth curved surface shape so as to come into contact with the cam-like contact surface without difficulty. A ball may be brazed to the tip of the spring pin, or a spring pin that has been processed into a spherical shape from the beginning may be used. The spring pin may be a leaf spring or a wire spring, but a wire material having elasticity is used.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. FIG. 3 is a view of the temple of the eyeglass frame having the spring pin hinge mechanism of the present invention as viewed from above (the direction of the head when wearing glasses>). The temple 1 is composed of a front part 2 and a rear part 3, and is connected to the armor by a top 210, and the front part and the rear part are connected by an external fitting part 220 and an internal fitting part 320. The top 210 has the same shape (top j112) as the prior art shown in FIG. 1, and can open the front part by about 90 ° (however, the coil spring j3 in FIG. 1 is unnecessary). The ear hook 310 is a temple end.
[0019]
FIG. 4 shows the structure of the external fitting part 220 at the front end. A fitting hole 221 for connecting to the rear portion is provided, and the spring pin is brazed to the base of the cut end of the outer fitting portion so that the spring pin 222 comes to a position adjacent to the fitting hole 221 (the brazing position is 2222). Note that a fitting hole may be provided without brazing and the shaft portion of the spring pin may be inserted and fixed.
[0020]
In the figure, the outer side is a view seen from the side opposite to the temporal region when wearing glasses, the inner side is a view seen from the temporal direction, and the upper side is a view seen from above the head. is there. The reason why the inner cut is longer than the outer cut is that the spring pin can be easily brazed to the base of the cut and the spring pin is bent inward. The spring pin may be a leaf spring or a wire spring. However, if the ball 2221 is brazed to the tip thereof, smooth contact with the internal fitting portion is possible.
[0021]
FIG. 5 shows the structure of the internal fitting part 320 at the tip of the rear part 3. The important point here is that the shape of the edge in the front portion direction of the fitting hole 321 is a cam-like curve, and the spring pin is bent when the ball of the spring pin moves along its side surface, that is, the cam-like contact surface 322. It is to be.
[0022]
FIG. 6 is a perspective view of the front part 2 and the rear part 3. The rear inner fitting portion 320 is inserted into the gap between the front outer fitting portion 220, the outer fitting hole 221 and the inner fitting hole 321 are aligned, and fastened with screws or pins. However, the screw or pin is tightened to such an extent that it can be rotated with the position of the fitting hole as a fulcrum. FIG. 7 is a view showing the relationship between the position of the internal fitting portion 320 and the spring pin 222 (the external fitting portion constituting the outside of the spring pin is omitted in the drawing). (A) of a figure is a positional relationship of the internal fitting part 320 and the spring pin 222 at the time of a natural state (state which does not apply force from the outside). At this time, the fitting hole 321, the spring pin ball 2221, the spring pin 222, and the brazed portion 2222 of the spring pin are arranged on the straight line g. That is, the spring pin is basically a straight line and is not bent (the position of the internal fitting portion and the spring pin may be adjusted so that the internal force is generated by slightly bending). The rear portion can rotate with the fitting hole 321 as a fulcrum, and the spring pin 222 can be bent with the brazed portion 2222 as a fulcrum. (B) shows the positional relationship between the spring pin 222 and the cam-like contact surface 322 when the rear portion is spread outward (when a force is applied in the expanding direction in the figure). The repulsive force (elastic force) of the spring pin generates a force f on the spring pin ball 2221 and pushes the cam-shaped contact surface 322 outward. The fitting hole 321 serves as a fulcrum, and F force is generated inward in the rear part.
[0023]
FIG. 8 is a diagram showing the relationship between the spring forces f and f ′ and the force F applied to the temple end depending on the position of the fulcrum. (A) is the case where the fulcrum O is a hinge, and the spring force f required to generate the force F applied to the temple end is f = F · L / l.
Is calculated. On the other hand, (b) shows a case where the fulcrum O ′ is the fitting hole shown in FIG. 7, and the spring force f ′ required to generate the force F applied to the temple end is f ′ = F · L ′ / l.
Is calculated. For convenience, the distance l from the fulcrum where the spring force is generated is the same as the force F applied to the temple end. Since the fulcrum has moved from O to O '
L ′ <L
That is,
f ′ <f
The following inequality holds. This means that the same internal force (the force with which the temple tightens the temporal head when wearing glasses) can be obtained even with a small force by moving the fulcrum to the position of the fitting hole as in the present invention. . This means that the same tightening force can be obtained even with a spring having a small elastic force, so that adjustment of the spring is easy and options are widened.
[0024]
Depending on the person, the distance between eyes (the width of both eyes) and the size of the temporal region are not necessarily proportional. In particular, like a child, when the width of the temporal region is large for a narrow binocular width, the temple opens into a figure of eight when trying to adjust at the position of the hinge, and the appearance is not good. In that respect, in the present invention, since it can be adjusted only at the rear portion, it looks natural when viewed from the front. FIG. 9 conceptually shows a state in which a person with a large temporal region hangs the temple 1 ′ adjusted at the normal hinge position and the temple 1 adjusted at the rear portion 3 of the present invention. (The temples are drawn linearly and exaggerated for clarity.) In the normal temple 1 ', the front part 2 is in a natural state (the state 902 is not expanded) in the temple 1 of the present invention, whereas the fitting hole 221 or 321 is expanded from the position of the hinge 210 to the figure of eight. Only the rear part 3 spreads from the starting point. Although it looks strange when viewed from the top, it looks like a natural spread of the temple as a whole. In the figure, the intersection 901 between the temple 1 ′ and the temple 1 is the position of the earlobe.
[0025]
FIG. 10 is a completed view of spectacles using the spectacle frame having the spring pin hinge mechanism of the present invention. Externally, it is not different from normal glasses, but the temple 1 is divided into a front part 2 and a rear part 3 by fitting holes 221 and 321. In addition, a spring mechanism is not provided at the hinge (top 210) position, but at the position of the fitting hole 221, it differs from a normal temple. The frame 210 connects the armor 5 and the front portion 2 to form a hinge mechanism for the entire temple, and connects the fitting holes 221 and 321 to form a spring pin hinge mechanism. In this example, both are screwed. FIG. 11 is an external view (front view) when folded.
[0026]
The present invention does not consider folding the front part and the rear part. Therefore, a mechanism for restricting the bending of the rear part in the inner direction is attached to the position of the external fitting part and the internal fitting part. FIG. 12 shows an example of a structure for restricting the rear portion from being bent in the inner direction. In this example, an inner direction bending restricting member 230 is provided in the front portion 2. (A) of a figure has shown the positional relationship of the spring pin 222 and the cam-like contact surface 322 when a rear part is extended outside. Due to the repulsive force (elastic force) of the spring pin, the cam-shaped contact surface 322 is pushed outward, the rear part opens outward, and the shape of the head fits. (B) is a positional relationship between the rear part 3 and the front part 2 in a natural state (a state in which no force is applied from the outside). At this time, the bending of the tip of the rear portion 3 in the inner direction is restricted by the inner direction bending restricting member 230.
[0027]
【The invention's effect】
The two-stage temple is different from the one-stage temple (ordinary temple), and the temple is divided into two parts. Moreover, many of them have a spring mechanism in the vicinity of the hinge (near the joint between the armor and the temple) in the same manner as a normal temple. However, since the spring pin hinge mechanism is provided at the joint between the front part and the rear part as in the present invention, a large tightening force can be generated even with the elastic force of a small spring. In addition, for children who have a narrow gap between their eyes and a large temporal width, such as a child, it can be adjusted to the width of the temporal region by using only the rear part, so that a natural temple can be produced. it can. Of course, since the width of the temple can be adjusted by the spring pin mechanism, it is possible to deal with many people with one product.
[0028]
As described in the prior art, there is a “spring-type vine for glasses” (Patent Document 8) as a two-stage temple. In the present invention, as in the present invention, a spring mechanism is configured with a joint between a front portion and a rear portion (in the present invention, referred to as a first segment and a second segment) as a fulcrum. However, in the present invention, the structure is complicated because the bow-shaped spring rod is inserted into the second segment. In that respect, in the present invention, it is only necessary to braze the spring pin to the hollow portion of the front portion or fit it into the fitting hole, so that the structure is simplified, the position of the spring pin is easy to adjust, and the structure is easy to process. .
[0029]
If the connection between the front part and the rear part is screwed, the rear part can be easily replaced. Therefore, the rear part can be freely exchanged and temples with different designs can be easily made. This is another derivative merit of the two-tiered temples in producing fashion.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a spring hinge structure using a conventional coil spring.
FIG. 2 is an explanatory diagram of a conventional spring-type temple with a two-stage structure.
FIG. 3 is a top view for explaining a temple structure of a spectacle frame having a spring pin hinge mechanism of the present invention.
FIG. 4 is a cross-sectional view for explaining an external fitting portion of a temple front portion of a spectacle frame having a spring pin hinge mechanism of the present invention.
FIG. 5 is a cross-sectional view for explaining an internal fitting portion of a temple rear portion of a spectacle frame having a spring pin hinge mechanism of the present invention.
FIG. 6 is a perspective view for explaining an external fitting portion and an internal fitting portion of a spectacle frame having a spring pin hinge mechanism of the present invention.
FIG. 7 is a cross-sectional view for explaining a spring pin mechanism of a spectacle frame having a spring pin hinge mechanism of the present invention.
FIG. 8 is a diagram for explaining the relationship between the spring force and the pressing force depending on the position of a fulcrum.
FIG. 9 is a conceptual diagram for explaining a difference in the shape of a temple when a two-stage temple of the present invention and a normal temple are expanded.
FIG. 10 is a completed view in which a spectacle frame having a spring pin hinge mechanism of the present invention is attached to a lens.
FIG. 11 is a front view when a spectacle frame having a spring pin hinge mechanism of the present invention is folded.
FIG. 12 is a diagram illustrating an example of a structure for restricting a rear portion from bending in an inner direction in the spectacle frame of the present invention.
[Explanation of symbols]
1 Temple (Two-stage temple consisting of a front part and a rear part)
1 'normal temple (one-stage temple)
2 Front part 210 frames
220 External fitting part 221 Fitting hole 222 Spring pin 2221 Spring pin ball 2222 Brazing part 230 Internal direction bending restricting member 3 Rear part 310 Temple end (ear hook part)
320 Internal fitting portion 321 Fitting hole 322 Cam-like contact surface 4 Lens 5 Yoroi 6 Bridge 901 Earlobe position 902 Lines when the temple is opened in a natural state F, f, f ′ Force L, L ′, l Distance from g Reference line O, O 'fulcrum jnnnn Symbols starting with j are used in the prior art (see text for details)

Claims (1)

In a spectacle frame provided with a temple having a structure divided into a front part on the side of the armor and a rear part on the side of the temple end,
(1) The front part of the armor side is
The portion facing the rear portion on the temple end side is divided into two forks when mounted, and a hollow structure is formed,
One end is fixed to the inner side of the hollow structure and the other end is squeezed with a spring pin having a smooth curved tip.
Provided with an external fitting part provided with a fitting hole near the foremost part divided into two forks,
(2) The rear part on the temple end side is
A fitting hole for connecting a portion facing the front portion on the side of the armor side in a form that is coaxial and rotatable with a fitting hole provided in the external fitting portion,
An internal fitting portion having a cam-like contact surface structure that is curved to enable smooth contact with the spring pin;
An eyeglass frame comprising a temple connected coaxially so as to be rotatable in the opening and closing direction of the temple through a fitting hole in the front part on the end side and the rear part on the temple end side.

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