Hinge mechanism in eyeglasses

Abstract: A turning method and a turning mechanism in eyeglasses capable of turning a temple with respect to a bracket with a simplified mechanism without using joints or bolts. The turning mechanism comprises a bracket (A) having a main trunk (2) and a hook (1), and a temple B being turnable with respect to the bracket A, wherein the hook (1) has a first part for supporting an end of the temple (B) so that the temple (B) is turned about the first part, and a second part for stopping turning of the temple (B). The turning mechanism can be made very light weight and dispense with additional parts such as bolts and nuts.

Description: The present invention relates to eyeglasses, more particularly, to a hinge mechanism in the eyeglasses. Eyeglasses having an excellent feeling of wearing such as fitness and aesthetical appearance have been desired so far. The eyeglasses have been developed in view of manufacturing technique and their materials, and improved in their designs. As a result, the eyeglasses having a very excellent design and feeling of wearing have been recently available in a market. In view of diversity of need and development of individuality of a customer, the customer has pursued better feeling of wearing of the eyeglasses such as fitness. However, the customer has not been satisfied with the feeling of wearing of the conventional eyeglasses. Particularly, in view of inherent function of the eyeglasses, rimless eyeglasses which are very bright in visual field, light in weight, and fashionable are becoming popular. The rimless eyeglasses have no frame body surrounding lenses and engage with side surfaces of the lenses, so that the customer is not prevented from being obstructed in a visual field. The rimless eyeglasses have a bridge and brackets (so-called lugs) which are directly attached to lenses, whereas normal eyeglasses have brackets, on which a bridge and temples are attached, attached to each rim. The bridge, the temples and the brackets of the rimless eyeglasses are linear and very light weighted. A turning mechanism such as joints, screws or bolts has been still employed so as to turn the temples with respect to the brackets. Fig. 7 is a prior art turning mechanism comprising a temple and a bracket coupled by joints, wherein Fig. 7(a) is a plan view and Fig. 7(b) is a side view. The bracket (usually called a lug) has two joints for receiving one end of the temple. When one end of the temple is inserted into the two joints and it is retained by a fixing member such as screws or bolts, the temple can be turned about the fixing member. Such a prior art turning mechanism using joints is called as "three piece hinge". When using the fixing member such as the screws or the bolts, the bracket and the temple become complex in their structures and heavy in their weight. If the temple is frequently turned about the fixing member in the prior art turning mechanism, the fixing member such as the screws or the bolts is loosened. Accordingly, such fixing member must be fixed periodically using an exclusive driver, etc., which has been very troublesome. Further, the turning mechanism comprising the joints, screws or the bolts requires many parts and complicated manufacturing process, which hinders reduction of cost. Accordingly, it has been important to simplify the turning mechanism using the joints for developing lightweight rimless eyeglasses. US 5 073 020 which has been used to formulate the preamble part of claim 1 discloses a hinge mechanism of eyeglasses comprising a bracket having a main trunk and a hook and a temple being pivotally mounted onto the bracket, wherein the hook has a first part for supporting an end of the temple so that the temple can be pivoted about the first part, and a second part for stopping pivoting of the temple. The present invention has been made to meet such requirement and to solve the aforementioned problems. That is, the inventors have devoted themselves to solve the problems of the prior art turning mechanism and found the fact that temples can be fixed to brackets without using the prior art turning mechanism such as screws or bolts by merely supporting each end of the temples by shaft supporters which are parts of the brackets. The inventors have completed the present invention based on this fact. It is an object of the present invention to provide a hinge mechanism in eyeglasses capable of turning temples with respect to brackets without using joints and fixing member such as screws or bolts as employed in the prior art turning mechanism. This object is solved by the turning mechanism of claim 1. In the invention, the first part is a shaft for supporting the end of the temple, and the second part is a downward directed part and a laterally directed part provided between the shaft and the main trunk for stopping pivoting of the temple. Further, the first part may be a shaft for supporting the end of the temple, and wherein the end of the temple is pressed on the shaft and the main trunk of the bracket so as to give resistance force to turning motion of the temple. Still further, it is an aspect of the invention to provide a hinge mechanism of eyeglasses comprising a bracket having a main trunk and a hook and a temple being turnable with respect to the bracket, wherein the temple has a sleeve provided at an end of the temple, and the hook includes a shaft for supporting the sleeve of the temple, and a stop part provided between the shaft and the trunk of the bracket for stopping turning of the temple supported by the shaft so as to be turned about the shaft and wherein the end of the temple is pressed between the shaft and the main trunk of the bracket so as to give resistance force to the pivoting motion of the temple. Since the hinge mechanism in eyeglasses is structured as mentioned above, each end of the temple is supported by and turnable about each shaft portion of the bracket. Fig. 1 shows a hinge mechanism according to a first embodiment of the invention, wherein Fig. 1(a) is a side view showing a state before the temple B is attached to the bracket A, Fig. 1 (b) is also a side view showing a state after the temple B is attached to the bracket A, and Fig. 1(c) is a plan view of the hinge mechanism showing a state before the temple B is turned with respect to the bracket A (solid line), and a state after the temple B is turned with respect to the bracket A (two dot chain line); Fig. 2 shows a hinge mechanism according to a second embodiment of the invention, wherein Fig. 2(a) is a side view showing a state before the temple B is attached to the bracket A, Fig. 2 (b) is also a side view showing a state after the temple B is attached to the bracket A, and Fig. 2(c) is a plan view of the hinge mechanism showing a state before the temple B is turned with respect to the bracket A (solid line), and a state after the temple B is turned with respect to the bracket A (two dot chain line); Fig. 3 shows a hinge mechanism according to a third embodiment of the invention, wherein Fig. 3(a) is a side view showing a state before the temple B is attached to the bracket A, Fig. 3 (b) is also a side view showing a state after the temple B is attached to the bracket A, and Fig. 3(c) is a plan view of the hinge mechanism showing a state before the temple B is turned with respect to the bracket A (solid line), and a state after the temple B is turned with respect to the bracket A (two dot chain line); Fig. 4 shows a hinge mechanism according to a fourth embodiment of the invention, wherein Fig. 4(a) is a side view showing a state before the temple B is attached to the bracket A, Fig. 4 (b) is also a side view showing a state after the temple B is attached to the bracket A, and Fig. 4(c) is a plan view of the hinge mechanism showing a state before the temple B is turned with respect to the bracket A (solid line), and a state after the temple B is turned with respect to the bracket A (two dot chain line); Fig. 5 shows a hinge mechanism according to a fifth embodiment of the invention, wherein Fig. 5(a) is a side view showing a state before the temple B is attached to the bracket A, Fig. 5 (b) is also a side view showing a state after the temple B is attached to the bracket A, and Fig. 5(c) is a plan view of the hinge mechanism showing a state before the temple B is turned with respect to the bracket A (solid line), and a state after the temple B is turned with respect to the bracket A (two dot chain line); Fig. 6 is a view of a hinge mechanism according to a modification of the invention showing a recess provided at a part of vertical or inclined portion of the bracket A in which the temple B is engaged; and Fig. 7 shows joints in a prior art hinge mechanism, wherein Fig. 7(a) is a plan view of the joints and Fig 7(b) is a side view of the joints. Elements which are described in first to fifth embodiments as illustrated in Figs. 1 to 5 and in a modification as illustrated in Fig. 6 are denoted at the same numerals. A first embodiment of the invention will be now described with reference to Fig. 1 showing a hinge mechanism provided between a temple B and a bracket A. Fig. 1(a) is a side view of the hinge mechanism showing a state before a cylindrical sleeve 3 of the temple B is attached to a shaft 13 of the bracket A, Fig. 1(b) is the same side view showing a state after the sleeve 3 is attached to the shaft 13, and Fig. 1(c) is a plan view of the hinge mechanism showing a state before the temple B is turned with respect to the bracket A (solid line), and a state after the temple B is turned with respect to the bracket A (two dot chain line). Each bracket A is attached to each lens of the eyeglasses and is normally called as "lug". The bracket A preferably employs a linear material which is made of metal such as stainless steel, iron, chromium, copper, nickel, zinc, aluminum, manganese, gold, titanium, cobalt, or alloy comprising a group selected from the group comprising the aforementioned metals, and plastic material such as cellulose, acetate, polyamide, and epoxy. The bracket A comprises a main trunk 2 and a hook 1 at an end portion thereof, wherein the other end of the main trunk 2 is fixed to the lens and the hook 1 is attached to the temple B. The hook 1 has a U-shaped configuration and comprises a downward directed part 11 which is bent downward from the main trunk 2, a laterally directed part 12 which is bent laterally from the downward directed part 11, and a shaft 13 which is bent upwardly from the downward directed part 11. Accordingly, the shaft 13 is integrally coupled with the main trunk 2 by way of the downward directed part 11 and the laterally directed part 12 (these two parts are hereinafter referred to as a coupled part between the main trunk 2 and the shaft 13). The temple B has an end cover, not shown, to be hooked by an ear at one end and the sleeve part 3 at the other end, wherein an inserting hole 31 is defined on the sleeve 3. The shaft 13 of the bracket A is inserted into the sleeve 3 of the temple B through the hole 31 of the sleeve 3 into the sleeve 3, so that the temple B is supported by the shaft 13 so as to be turnable about the shaft 13. Since the coupled part exists between the shaft supporter 13 and the main trunk 2, the turning of the temple B is stopped when the temple B is pressed on the coupled part although the temple B can be freely turned with respect to the bracket A. When the shaft supporter 13 and the main trunk are disposed on the same plane as illustrated in solid line of Fig. 1(c), the temple B is in a state to be substantially linear with the bracket A, so that the temple B is not turned further beyond the coupled part, namely, a stop part or the downward directed part 11 and the laterally directed part 12. That is, when the temple B strikes against the downward directed part 11 of the bracket A, it is not turned further when the shaft 3 of the temple B is coupled to the shaft supporter 13 of the bracket A. The stop portion may have such a shape that it presses on the temple B when the temple B turns about the shaft supporter 13 and stops the turning of the temple B. With such a hinge mechanism, the temple B supported by the shaft 13 of the bracket A can be freely pivoted without using the joints, screws or bolts. A hinge mechanism according to a second embodiment of the invention will be described with refer to Fig. 2. Fig. 2(a) is a side view of the turning mechanism showing a state before the sleeve 3 of the temple B is attached to the shaft 13 of the bracket A, Fig. 2(b) is the same side view showing a state after the sleeve 3 is attached to the shaft 13, and Fig. 2(c) is a plan view of the hinge mechanism showing a state before the temple B is turned with respect to the bracket A (solid line) and a state after the temple B is turned with respect to the bracket A (two dot chain line). The second embodiment is different form the first embodiment as follows. That is, the downward directed part 11 of the hook 1 of the second embodiment is curved to form a so-called curved part 11B and the sleeve 3 of the second embodiment is different from that of the first embodiment in an external appearance thereof. The temple B supported by the shaft 13 of the bracket A is turned without receiving any resistance in the first and second embodiments. However, a customer wearing the eyeglasses does not feel any resistance, i.e., moderation in his hands unless resistance force is given to some extent to the temple B when the temple B is turned about the shaft supporter 13, which causes the customer to feel as if he wore the eyeglasses of very coarse temples B. The following third embodiment solved this problem. Fig. 3 shows a third embodiment which enables the customer to feel moderation when resistance force is given to the hinge mechanism of Fig. 1. Fig. 3(a) is a side view of the hinge mechanism showing a state before the sleeve 3 of the temple B is attached to the shaft 13 of the bracket A, Fig. 3(b) is the same side view showing a state after the sleeve 3 is attached to the shaft 13, and Fig. 3(c) is a plan view of the turning mechanism showing a state before the temple B is turned with respect to the bracket A (solid line), and a state after the temple B is turned with respect to the bracket A (two dot chain line). Since the shaft 13 is strongly pressed on the main trunk 2 from the lower side thereof toward the upward direction, when the sleeve 3 of the temple B is attached to the shaft 13 of the bracket A, the sleeve 3 is strongly pressed between the shaft 13 and the main trunk 2, which gives resistance force to the turning motion of the temple B. More in detail, a side surface 33 of the sleeve 3 is strongly pressed on the main trunk 2, so that frictional resistance is produced between the side surface 33 and the main trunk 2. When the customer turns the temple B, the temple B is turned heavily due to the resistance force caused by the frictional resistance, so that the customer feels moderation. Fig. 4 shows a fourth embodiment which gives resistance force to the hinge mechanism of the temple B in a manner different from the manner in the third embodiment. Fig. 4(a) is a side view of the turning mechanism showing a state before the shaft 3 of the temple B is attached to the shaft 13 of the bracket A, Fig. 4(b) is the same side view showing a state after the sleeve 3 is attached to the shaft 13, and Fig. 4(c) is a plan view of the hinge mechanism showing a state before the temple B is turned with respect to the bracket A (solid line), and a state after the temple B is turned with respect to the bracket A (two dot chain line). When the sleeve 3 of the temple B is inserted into the shaft 13 of the bracket A, while the shaft 13 of the bracket A is strongly pressed on the main trunk 2 from the lateral direction, the sleeve 3 is strongly pressed between the shaft 13 of the bracket A and the main trunk 2 of the bracket A, which gives resistance force to turning motion of the temple. More in detail, a peripheral surface 32 of the sleeve 3 is strongly pressed on the main trunk 2, so that frictional resistance is produced between the peripheral surface 32 and the main trunk 2. When the customer turns the temple B, the temple B is turned heavily due to the resistance force caused by the frictional resistance, so that the customer feels moderation. Fig. 5 shows a fifth embodiment of the invention wherein the downward directed part 11 of the coupled part in the third embodiment has an inclined part 11A. Fig. 5(a) is a side view of the hinge mechanism showing a state before the sleeve 3 of the temple B is attached to the shaft 13 of the bracket A, Fig. 5(b) is the same side view showing a state after the 3 is attached to the shaft 13, and Fig. 5(c) is a plan view of the hinge mechanism showing a state before the temple B is turned with respect to the bracket A (solid line), and a state after the temple B is turned with respect to the bracket A (two dot chain line). Although the temple B can be freely turned with respect to the bracket A, because of the presence of the inclined part 11A of the coupled part, the temple B strikes against the inclined part 11A, which prevents the temple B from being further turned. When the customer wears eyeglasses, the temples B are supported by his ears, so that the temples B always receive force in an upward direction about the shafts 13, and hence much load is applied to the shafts 13. In Fig. 5, since the temple B per se is slightly elastic, the temple B is operated to get over the inclined part 11A of the coupled part and move along the inclined part 11A when the temple B is likely to open or to be turned, so that downward repulsive force is applied to the temple B in a downward direction. As a result, a reverse force is applied to the temple B in the direction to cancel the upward force which is always applied to the temple B, so that the load to be applied to the shaft 13 is lessened. Fig. 6 show a modification of the coupled part in the first to fifth embodiments. The downward directed part 11, the inclined part 11A or the curved part 11B of the coupled part of the bracket A has a recess S at a portion where the temple B contacts. The recess S has various shaped such as triangular, round, square shapes, etc. In a dynamic point of view, no excessive load is applied to the hinge mechanism since the sleeve 3 of the temple B engages in the recess S, and the force supporting the temple B is dispersed to the downward directed part 11, the inclined part 11A or the curved part 11B. Although the invention is described with reference to first to fifth embodiments and the modification thereof, it is a matter of fact that the invention is not limited to those embodiments and modification but it can be variously modified unless deviating from the scope of protection, as defined in the claims. For example, the coupled part, namely, stop part provided at the hook 1 is not limited to the downward directed part 11, the inclined part 11A and the curved part 11B but it may have any shape if it can stop the turning of the temple B. The sleeve 3 of the temple B may have any shape if it can be attached the shaft 13 of the bracket A so as to be turnable about the shaft 13. Although the hook 1 is provided on the bracket A and the sleeve 3 is provided on the temple B, it is a matter of course that the hook 1 and the sleeve 3 are provided reversely, namely, the hook 1 is provided on the temple B and the sleeve 3 is provided on the bracket A. With such an arrangement of the invention, the turning mechanism per se can be made very light because the joints are not used, and it can dispense with additional parts such as bolts and nuts. When the sleeve 3 of the temple B is pressed between the shaft 13 and the main trunk 2 of the bracket A, resistance force is given to the turning motion of the temple B, and hence the customer feels moderation when turning the temple B.

Claims: A hinge mechanism of eyeglasses comprising a bracket (A) having a main trunk (2) and a hook (1), and a temple (B) being pivotally mounted onto the bracket (A), wherein the hook (1) has a first part (13) for supporting an end of the temple (B) so that the temple (B) can be pivoted about the first part, and a second part (11) for stopping pivoting of the temple (B); characterized in that the hook (1) has the shape of a loop formed in such a way that a first portion (11) is bent downward from the main trunk (2) of the bracket, and a second portion (12) is bent laterally from the downwardly directed first portion (11) and substantially parallel to the main trunk (2); a third portion is bent upwardly from the second portion (12) of the hook toward the main trunk (2) such as to form a shaft (13); the temple comprises at one end a sleeve (3) the shaft (13) of the bracket is inserted into the sleeve (3) such that the bracket and the temple are connected together in a hinge structure, so that the downwardly directed first portion (11) forms a stop for limiting the pivoting of the temple The hinge mechanism according to claim 1, wherein the first part is a shaft (13) for supporting the end of the temple (B) and wherein the end of the temple (B) is pressed between the shaft (13) and the main trunk (2) of the bracket (A) so as to give resistance force to the pivoting motion of the temple (B).

Inventors: HORIKAWA KAORU, KOMATSUBARA KAZUMI, HORIKAWA, KAORU, KOMATSUBARA, KAZUMI, KOMATSUBARA, KAZUMI, C/O BOSTON CLUB CO., LTD.
Applicants: BOSTON CLUB CO LTD, HORIKAWA CO LTD, BOSTON CLUB CO., LTD., HORIKAWA CO., LTD.
Application year: 1995
Main classification: G02C5
IPC codes: G02C5