Detachable flip-up spectacles

Abstract

To provide detachable flip-up spectacles which facilitate attachment / detachment of a front frame to / from a frame, suppress detachment of the front frame in use carelessly, can prevent poor format in appearance, and can be produced at a low cost.SOLUTION: A front frame 2 has a front bar 22 which is provided on upper sides of lenses 21. Multiple shaft base end parts 25 protruding rearward are arranged at a prescribed interval on a back face side of the front bar 22, and a shank part 26 extending in any of right and left sides from a tip end of each shaft base end part 25 is provided. The front bar 22, the shaft base end parts 25 and the shank parts 26 are integrally formed without a seam, on the other hand, a frame 1 has back bars 14 at positions facing the front bars 22. The back bar 14 has: multiple reception parts 16 provided so as to receive respective shaft base end parts 25; and bearing parts 17 each of which is provided on a side wall part 161 of the reception part 16.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to detachable flip-up eyeglasses whose front frame, to which lenses are attached, can be attached and detached as needed, and whose front frame can be flipped up. [Background technology]

[0002] People with age-related presbyopia have difficulty seeing things close to them, so they wear reading glasses as needed to see what is close to them. However, there are cases where reading glasses are not necessary to see things far away, and many people use reading glasses only when looking at things close to them. However, it is troublesome and inconvenient to carry reading glasses all the time and to put them on and take them off when you want to see something close up.

[0003] Therefore, conventionally, flip-up glasses have been used, which can flip up the front frame to which the lenses of reading glasses are attached. With flip-up glasses, the front frame can be flipped up while the frame is still attached, allowing the user to see distant objects with the naked eye without using lenses. On the other hand, the front frame can be lowered while the frame is still attached, allowing the user to see objects close to them through the lenses. In this way, by using flip-up glasses, the frame can be worn at all times, and the user can switch between viewing through the naked eye and viewing through the lenses of reading glasses as needed.

[0004] For example, Patent Document 1 discloses a technique for flip-up glasses that allows front-mounted glasses (corresponding to the front frame) to be smoothly flipped up at any angle. As shown in Fig. 10, this flip-up glasses 800 has front-mounted glasses 82 pivotally attached to glasses 81 (corresponding to the frame) via a biasing connector 83. Attached The force coupling device 83 is composed of bearing projections 84 , a fitting projection 85 , a shaft body 86 , a coil spring 87 , and a pressure support screw 88 .

[0005] With the above-described configuration, the frictional force of the fastening of the pressure support screw 88 is increased by the biasing force of the coil spring 87. The increased frictional force can prevent the pressure support screw 88 from rotating in the loosening direction due to rotation during the lift-up.

[0006] Patent Document 2 discloses a technique for flip-up glasses with a function to prevent drowsiness at the wheel. As shown in Fig. 11, these glasses 900 for preventing drowsiness have hinges 92, 92 protruding integrally from the rear surface side of the bridge of a front frame 91 (corresponding to the front frame). Also, a brow bar 93 is provided with shafts 94, 94.

[0007] A rotation axis is formed by fitting the hinge portions 92 onto the shaft portions 94, so that the front frame 91 can be lifted upward with the hinge portions 92 as fulcrums. In addition, since the hinge portions 92, 92 are configured to elastically expand and engage with the shaft portions 94, 94, they can be easily attached, but can also be removed and replaced with a different front frame if necessary. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2011-75862 A [Patent Document 2] Utility Model Registration No. 3227691 Summary of the Invention [Problem to be solved by the invention]

[0009] However, in the technology of Patent Document 1, the structure of the pivot part for flipping up was complicated, and the manufacturing cost was high. In addition, because it was necessary to insert a coil spring and tighten a screw, the pivot part became large and the front frame protruded forward. Therefore, there was also a problem that the appearance was unsightly.

[0010] On the other hand, the technology of Patent Document 2 has a configuration in which the hinge part is pressed against the shaft part to fit it, which reduces manufacturing costs. However, since the hinge part elastically expands to fit the shaft part, the hinge part easily comes off the shaft part when a force is applied to remove the hinge part from the shaft part. In other words, there is a problem in that the front frame is easily detached from the brow bar when not intended during use.

[0011] The present invention has been made in view of the above problems, and its purpose is to provide detachable flip-up eyeglasses in which the front frame can be easily attached to and detached from the frame, while the front frame is unlikely to come off accidentally during use. In addition, it is also an object of the present invention to provide detachable flip-up eyeglasses in which the appearance can be prevented from becoming unsightly and which can be manufactured inexpensively. [Means for solving the problem]

[0012] The means adopted by the present inventors to solve the above problems will be described below. The detachable flip-up eyeglasses of the present invention are equipped with a front frame made of an elastic material that holds lenses, and a frame that detachably supports the front frame and allows it to be flipped up.

[0013] Its basic configuration is that the front frame has a front bar provided above the lens, and multiple shaft base ends protruding rearward are arranged at a predetermined interval from the back side of the front bar, and a shaft portion is provided extending in either the left or right direction from the tip of each of the shaft base ends, with the front bar, shaft base ends and shaft portions being formed seamlessly as a single unit. Here, "integrally formed without seams" refers to a structure that is not made up of a combination of multiple members, but is integrally formed as a single member.

[0014] On the other hand, the frame is provided with a back bar opposite the front bar, and the back bar is provided with a plurality of receiving portions arranged to be able to receive each of the shaft base ends, and bearing portions provided on the side wall portions of each of the receiving portions. Here, "capable of receiving the shaft base end" means that the shaft base end is formed to have a shape that matches the shape of the shaft base end so that the shaft base end can be fitted or inserted.

[0015] As described above, the shaft portion extends in either the left or right direction from the tip of the shaft base end. In other words, the shaft portion protrudes laterally and is inserted into the bearing portion to form a rotating shaft. In this way, because the shaft portion extends laterally, when the shaft portion is inserted into the bearing portion, the shaft portion extending laterally will not come out of the bearing portion even if you try to remove the front frame forward or backward. In other words, the front frame is configured so that it cannot be easily removed by a force in the front-rear direction.

[0016] Incidentally, the front frame is made of an elastic material and can be elastically deformed when force is applied. Therefore, the multiple axle base ends and axle parts provided on the front bar are elastically deformed so as to curve the entire front frame, so that the distance between the multiple axle base ends spaced apart at a predetermined interval moves closer or farther apart in the left-right direction. In other words, the distance between the multiple axle parts also moves closer or farther apart in the left-right direction in the axle parts.

[0017] For example, when the front frame is bent so that both ends move forward and the center of the front frame moves backward, the distance between the shafts is displaced. Here, when the shafts extend in a direction facing inward from each other, bending as described above displaces the shafts in a direction that allows them to come out of the bearings, so that the shafts can be removed from the bearings.

[0018] Conversely, when the front frame is bent so that both ends move backward and the center of the front frame moves forward, the shafts are displaced so that the distance between them decreases. Here, when the shafts extend in directions that face outward from each other, bending as described above displaces the shafts in a direction that allows them to come out of the bearings, so that the shafts can be removed from the bearings.

[0019] Therefore, with the above configuration, the front frame can be easily attached and detached by elastically bending and deforming it, while the axis itself extends in the left-right direction, so that even if a force is applied that attempts to remove the front frame in the front-to-rear direction, the front frame will not come off inadvertently during use. In addition, since the shaft base end is received in the receiving portion and the shaft portion is inserted into the bearing portion, the rotating shaft is hidden within the receiving portion when assembled, and therefore the external appearance can be improved. In addition, because the front bar, the shaft base end, and the shaft portion are seamlessly formed as one unit, the number of parts can be extremely reduced.

[0020] In addition to the above configuration, the following configurations can also be adopted as means for solving the problem. Its basic structure is that the frame has back bars on the left and right end pieces, and multiple axle base ends protruding forward from the front side of the back bars are arranged at a predetermined interval, and axle portions extending in either the left or right direction are provided from the tip of each axle base end, with the back bars, axle base ends and axle portions being formed seamlessly as a single unit.

[0021] On the other hand, the front frame has a front bar positioned opposite the back bar, and the front bar has a plurality of receiving portions arranged to be able to receive each of the shaft base ends, and bearing portions provided on the side wall portions of each of the receiving portions.

[0022] The configuration differs from the above in that the shaft base end and shaft portion are provided on the frame side rather than on the front frame side, and the receiving portion and bearing portion are provided on the front frame side rather than on the frame side. In the case of this configuration, when the front frame made of an elastic material is bent and deformed, it is not the shaft portions but the bearing portions that move closer or farther apart. This configuration also provides the same effect as the previously described configuration.

[0023] Another means that can be adopted to solve the problem is to configure the receiving portion with a depth that can accommodate almost the entire base end of the shaft, so that when the front frame is lowered, the back surface of the front bar and the front surface of the back bar are close to or in close contact with each other in the portion adjacent to the base end of the shaft and the receiving portion, and the back surface of the front bar and the front surface of the back bar are spaced apart in the portion on the tip side of the portion adjacent to the base end of the shaft and the receiving portion.

[0024] Here, in the present invention, "close or in close contact" includes not only complete contact, but also close enough to be seen as touching macroscopically, even if there is a slight gap due to assembly error or a slight gap intended to prevent interference between parts when rotating.

[0025] By configuring the receiving section to accommodate substantially the entire shaft base end, the front bar and the back bar are in close proximity or in close contact with each other at least in the portions adjacent to the shaft base end and the receiving section. By bringing the front bar and the back bar in close proximity or in close contact with each other, when the front frame is lowered, the front frame and the frame appear to be one body, and when worn, the glasses look like normal glasses, without the unfashionable impression of the front bar protruding forward, and have a good appearance.

[0026] When wearing the eyeglasses, the temples are opened to hold the sides of the head, and the ear hooks of the temples are placed on the ears. At this time, the temples open and the parts of the frame that correspond to the end pieces shift forward. In eyeglasses, the end piece is generally curved backward, but in the case of flip-up eyeglasses, a small gap is generated between the backward curved end piece and the front frame. In such flip-up eyeglasses, when the temples are opened, the position of the end piece shifts forward as described above, eliminating this gap, which may cause the end piece to hit the front frame.

[0027] If the temple is opened beyond a certain point and hits the front frame, even if the temple is opened further, the end piece will be pushed back by the elastic force of the front frame when it tries to move forward, and the forward movement of the end piece, i.e., the opening of the temple, will be restricted. In this case, the elastic force increases extremely and the clamping force may become too strong.

[0028] On the other hand, if the back surface of the front bar and the front surface of the back bar are approximately in contact at least in the portion adjacent to the base end of the shaft and the receiving portion, and the back surface of the front bar and the front surface of the back bar are spaced apart in the portion closer to the temple than the portion adjacent to the base end of the shaft and the receiving portion, then when the temple is opened and the temple is gradually displaced forward, the portion where the front bar and the back bar are approximately in contact will shift toward the temple side. In addition, because the shaft and the bearing are inserted to form an integrated rotating shaft, when the temples are opened, the end pieces are displaced forward, and the parts that are roughly in contact with the rotating shaft as a fulcrum are displaced forward, pushing out the front bar. As a result, both ends of the front bar are also displaced forward in the same way.

[0029] Therefore, when the temples are opened, the elastic force of the front frame is gradually applied in addition to the elastic force of the temples. Therefore, the clamping force does not increase suddenly depending on the amount of opening of the temples, and a stable fit can be obtained regardless of the size of the wearer's head.

[0030] As another means that can be adopted to solve the problems of the present invention, it is also possible to configure the front bar so that when viewed from the front with the front bar lowered, the entire back bar is covered and hidden by the front bar. That is, when viewed from the front, the width of the front bar including the shaft base end portion is configured to be larger than the width of the back bar including the receiving portion.

[0031] By configuring the back bar so that it is entirely covered by the front bar, it is possible to give the glasses an appearance that is not like flip-up glasses but like ordinary glasses at first glance, improving the appearance.

[0032] As another means that can be adopted to solve the problems of the present invention, a stopper that protrudes rearward from the back side can be seamlessly formed integrally on the front bar, so that when the front bar is lowered, the stopper contacts the upper or lower surface of the back bar, while when the front bar is raised, the stopper contacts a surface other than the upper or lower surface of the back bar.

[0033] The protruding stopper acts to contact a different adjacent surface by the rotational movement of the back bar surface that it is in contact with, which bounces up or down. At this time, the protruding stopper moves to cross the ridge of the boundary between the surface that was in contact before the rotation and the surface that it will be in contact with after the rotation. By crossing the boundary, you can get the feeling of being pulled from the middle of the rotation to the position after the rotation.

[0034] In addition, after the front frame is lifted up or lowered down, the stopper is in contact with a specific surface on the back bar. To start lifting or lowering from this state, the stopper must overcome the edge of the boundary between the surface it is in contact with and the adjacent different surface before it can begin to rotate. In this way, the front frame will not lift up or down due to a slight force that occurs unexpectedly, so the position of the front frame can be stably maintained during use. Effect of the Invention

[0035] In the present invention, the front bar or back bar is provided with an axle base end and an axle extending in the left-right direction, and the back bar or front bar is provided with a receiving portion and a bearing portion at a corresponding position. With this configuration, the front frame can be easily attached to the frame by elastically bending and deforming it. Meanwhile, because the axle extending in the left-right direction is inserted into the bearing portion, the axle will not come out of the bearing portion even if a force is applied to the front frame in the front-rear direction. This has the effect of making it possible to easily attach and detach the front frame to the frame, while at the same time making it difficult for the front frame to come off accidentally during use.

[0036] In addition, the protruding shaft base end is receivably attached to the receiving portion, and the shaft portion is inserted into the bearing portion inside the receiving portion, so that the shaft portion is not exposed but hidden in the assembled state. Furthermore, the shaft base end and the shaft portion are seamlessly formed as one piece. This has the effect of preventing unsightly appearance and enabling inexpensive manufacturing. [Brief description of the drawings]

[0037] [Figure 1] 1A and 1B are three-view diagrams illustrating the detachable flip-up eyeglasses of the present invention. [Diagram 2] 1A to 1C are a front view, a plan view, and a partial cross-sectional view showing a frame of detachable flip-up eyeglasses of the present invention. [Diagram 3] 1A and 1B are a front view and a plan view showing a front frame of the detachable flip-up eyeglasses of the present invention. [Figure 4] 10A to 10C are explanatory diagrams showing a method of attaching the front frame of the detachable flip-up eyeglasses of the present invention. [Diagram 5] 1 is an explanatory diagram showing a state in which the detachable flip-up eyeglasses of the present invention are flipped up. [Figure 6] 1 is an explanatory diagram showing how the temples of the detachable flip-up eyeglasses of the present invention are opened; [Figure 7]FIG. 11 is a plan view showing detachable flip-up eyeglasses according to a first modified example of the present invention. [Figure 8] FIG. 11 is a plan view showing detachable flip-up eyeglasses according to a second modified example of the present invention. [Figure 9] FIG. 11 is a plan view showing detachable flip-up eyeglasses according to a third modified example of the present invention. [Figure 10] FIG. 1 is a partial perspective view showing a conventional example of Patent Document 1. [Figure 11] 1A to 1C are a front view, a plan view, and a partial side view illustrating a conventional example of Patent Document 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0038] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, detachable flip-up eyeglasses 100 of the present invention include a frame 1 having no lenses, and a front frame 2 having lenses 21 attached thereto and being separate from the frame 1. The front frame 2 is detachably attached to the frame 1 and is rotatably attached so that it can be flipped up.

[0039] First, the frame 1 will be described with reference to Fig. 2. The frame 1 includes left and right temples 11, a pair of end pieces 12 that rotatably connect the temples 11, a bridge 13 located between the end pieces 12, and back bars 14 that connect the bridge 13 to the left and right end pieces 12. A pair of nose pads 15,15 are provided at the ends of the back bars 14,14 on the bridge 13 side so as to extend from the back bars 14,14.

[0040] In the embodiment shown in Fig. 2, the frame 1 does not include lenses, but the back bar 14 may be used as a rim and include lenses. The bridge 13 is not an essential component, and the endpieces 12 and 12 may be connected by a single back bar 14 without the bridge 13.

[0041] The entire frame 1 can be made of synthetic resin, which is an elastic material. In the embodiment shown in Fig. 2, the end pieces 12 and the bridge 13 are seamlessly formed from the same material as the back bar 14. Here, in the present invention, the end pieces 12, the bridge 13, and the back bar 14 can be formed from a single resin molded product, but each part can also be formed separately and then fused together to form a seamless integrated structure.

[0042] Various synthetic resins can be used, such as polycarbonate, acetate, polyethylene, etc. In addition, metal and wood can also be used as long as they are elastic materials.

[0043] The back bar 14 has a substantially square cross section, and is formed along the shape of the upper side of a lens 21 of the front frame 2, which will be described later. Further, the left and right back bars 14 are provided with receiving portions 16, as shown in the partial cross-sectional view of Fig. 2. The receiving portion 16 is formed so as to be able to receive substantially the entire shaft base end portion 25 of the front frame 2, which will be described later. In the embodiment of Fig. 2, the receiving portion 16 is formed so as to have a concave shape, but it may have another shape, such as a groove shape, as long as it is able to receive the shaft base end portion 25.

[0044] The receiving portion 16 is provided in a concave shape so as to have openings on the front surface 141 side and the top surface 142 side of the back bar 14, and has no openings on the back surface 143 and the bottom surface 144. Further, a side wall portion 161 of the receiving portion 16 on the endpiece 12 side is provided with a bearing portion 17 which is a hole having a circular cross section. In the embodiment shown in Figure 2, the receiving portion 16 and the bearing portion 17 are positioned approximately in the center of the back bar 14, but this position is aligned with the position of the shaft base end portion 24 of the front frame 2 described later, and they may be positioned closer to the end piece 12 side of the back bar 14 or on the bridge 13 side.

[0045] Next, the front frame 2 will be described with reference to Fig. 3. The front frame 2 comprises left and right lenses 21, front bars 22 arranged above the lenses 21 to support the lenses, under-rims 23 arranged below the lenses 21 to support the lenses, and a front bridge 23 connecting the front bars 22 together.

[0046] 3, the front frame 2 is configured with left and right lenses 21, 21, but it may also be configured with a single integrated lens 21 like sunglasses. Also, the under-rim 23 and the front bridge 23 are not essential components, and the glasses may be a half-rim type that does not have an under-rim 23 and supports the lens 21 only with the front bar 22, or the above-mentioned integrated lens type that does not have the front bridge 23.

[0047] The front frame 2 can be entirely made of synthetic resin, which is an elastic material, like the frame 1. In the embodiment shown in Fig. 3, the under-rim 23 and the front bridge 24 are seamlessly formed from the same material as the front bar 22. Here, in the present invention, the front bar 22, the under-rim 23, and the front bridge 24 can be formed from a single resin molded product, but each part can also be formed separately and then fused together seamlessly.

[0048] The front bar 22 , like the back bar 14 , has a substantially square cross section and is formed along the shape of the upper side of the lens 21 . Further, two shaft base ends 25, 25 protruding rearward are arranged at a predetermined interval from the back side of the front bars 22, 22. That is, a shaft base end 25, 25 protrudes from each of the middle parts of the left and right front bars 22, 22.

[0049] The shaft base end 25 is in the shape of a rectangular column with a rounded tip and a square cross section, and is hidden by the front bar 22 when viewed from the front, so that it cannot be seen. Further, cylindrical shaft portions 26, 26 extend from the tip end of each of the shaft base ends 25, 25 in the direction towards the endpiece 12.

[0050] The shaft base end 25 is received so that the entirety is accommodated in the recessed receiving portion 16 provided in the back bar 14. At this time, the shaft base end 25 protrudes to a position where it is positioned close to the side wall portion 161 of the receiving portion 16 on the endpiece 12 side. The width of the receiving portion 16 is configured to be larger than the width of the shaft base end 25 plus the length of the shaft portion 26. Therefore, when the shaft base end 25 is received in the receiving portion 16, there is a gap on the bridge 13 side of the receiving portion 16. This gap provides a clearance when shaft portion 26 is inserted into or removed from bearing portion 17 during installation or removal, which will be described later.

[0051] Meanwhile, tongue-shaped stoppers 27, 27 protrude rearward from the back surface of the front bar 22. The stoppers 27 protrude toward the endpiece 12 side from the shaft base end 25 at a slight distance. When the front frame 2 is attached to the frame 1, the lower surface 271 of the stopper 27 is in contact with the upper surface 142 of the back bar 14 having a square cross section. The function of the stopper 27 will be described later.

[0052] Next, a method for attaching the front frame 2 to the frame 1 will be described with reference to FIG. First, as shown in Fig. 4(a), the front frame 2 is slightly elastically deformed by hand so that it is curved. At this time, in the case where the shaft portion 26 is configured to extend outward as in the embodiment of Fig. 2, the front frame 2 is curved so that both ends are displaced rearward.

[0053] Conversely, when the shaft portion 26 is configured to extend inward, both ends of the front frame 2 are curved so as to shift forward. Fig. 4(a) shows a case where both ends of the front frame 2 are curved so as to shift backward. When the front frame 2 is elastically deformed and curved in this manner, the distance between the shaft portions 26 becomes closer.

[0054] Next, as shown in Figure 4 (b), with the front frame 2 kept bent, the shaft base ends 25·25 are inserted into the receiving portions 16·16 until the entire shaft base end 25 is received in the receiving portion 16. At this time, because there are gaps between both ends of the front bar 22 and both ends of the back bar 14, even if the front frame 2 is curved, when the shaft base ends 25·25 are received in the receiving portions 16·16, both ends of the left and right front bars 22·22 can be received without colliding with the endpieces 12·12. The gaps will be described later.

[0055] Then, as shown in FIG. 4(c), when the hand is released to return the elastic deformation to its original state, the distance between the shaft portions 26, 26 which had been approaching each other returns to its original position, and the shaft portions 26, 26 are inserted into the bearing portions 17, 17. By the above procedure, the front frame 2 can be easily attached to the frame 1 so that it can be flipped up, and once the shaft portion 26 is inserted into the bearing portion 16, the front frame 2 will not easily come off. When removing the front frame 2 from the frame 1, it can be easily removed by reversing the above procedure.

[0056] In the state where the front frame 2 is attached to the frame 1 in the above-mentioned procedure, the frame 1 and the front frame 2 are disposed so as to be close to each other or in close contact with each other when the front frame 2 is lowered. More specifically, the close to each other or in close contact with each other is achieved over the area between the adjacent portions of the left and right shaft base ends 25·25 on the endpiece 12·12 side. In addition, in the range from the portion adjacent to the end pieces 12 / 12 of the shaft base ends 25 / 25 to both ends, the front bar 22 and the back bar 14 are formed so that the gap between the front frame 2 and the frame 1 gradually widens toward both ends.

[0057] The area in close proximity or in close contact does not necessarily have to cover the entire area where the frame 1 and the front frame 2 face each other, but it is preferable to arrange at least the areas adjacent to the base end portion 25 of the shaft and the bearing portion 17 in close proximity or in close contact in terms of the expanding action of the temples 11·11 described below.

[0058] Next, the operation of flipping up the front frame 2 will be described with reference to FIG. First, as shown in FIG. 5(a), the front frame 2 is attached to the frame 1 by the procedure described above, and the front frame 2 is placed in a position where it can be viewed through the lens 21 in a lowered state. When the front frame 2 is to be lifted upward from this state, the front frame 2 rotates about the rotation axis formed by the shaft portion 26 and the bearing portion 17 and lifts up.

[0059] As mentioned above, the stopper 27 protrudes from the back surface of the front bar 22. Because the back bar 14 has a square cross section, there are corners at the boundaries of each surface of the back bar 14. When attempting to rotate the front frame 2 around the shaft 26, the stopper 27 must elastically deform to overcome the corners before it can rotate. Therefore, unless a certain force is applied, the stopper 27 cannot overcome the corners and cannot rotate.

[0060] Here, if the stopper 27 were not present, there is a possibility that the front frame 2 would slide down due to its own weight below the position at which it can be used as glasses. In contrast, in the present invention, the lower surface 271 of the stopper 27 is in contact with the upper surface 141 of the back bar 14, so even if the stopper 27 tries to slide downward, the weight of the front frame 2 alone is not enough to cause the stopper 27 to elastically deform to overcome the corner between the front surface 141 and upper surface 142 of the back bar 14, and the stopper 27 will not slide down.

[0061] On the other hand, when flipping the front frame 2 upward, a certain amount of force is applied with the fingers to flip it up, so that the stopper 27 can rotate over the corner between the upper surface 142 and the back surface 143 of the back bar 14, as shown in FIG. 5(b). At this time, the front frame 2 that has been flipped up is in a state where the lower surface 271 of the stopper 27 is in contact with the back surface 143 of the back bar 14. Even in this state, as described above, the weight of the front frame 2 alone is not enough to cause elastic deformation for the stopper 27 to overcome the corner between the back surface 143 and the upper surface 142 of the back bar 14, and the stopper 27 does not slide down.

[0062] In this way, by providing the tongue-shaped stopper 27, the front frame 2 can be held in a predetermined position, and by applying force, the front frame 2 can be raised and lowered by rotating the shaft portion 26 as an axis. The action of lowering the front frame 2 by applying force with the fingers is the same as that of flipping it up.

[0063] Next, the operation of putting on the detachable flip-up glasses 100 of the present invention will be described with reference to Fig. 6. When putting on the detachable flip-up glasses 100, the temples 11·11 are elastically spread apart to fit the width of the head and positioned so that the temples 11·11 are over the ears, and then the temples are returned to their original position to hold the sides of the head, and the glasses are put on by hanging the temples 11·11 over the ears.

[0064] As described above, the front bar 22 and the back bar 14 are in close or in tight contact with each other between the portions adjacent to the end pieces 12 / 12 of the left and right shaft base ends 25 / 25, while in the range from the portions adjacent to the end pieces 12 / 12 of the shaft base ends 25 / 25 to both ends, the gap between the front frame 2 and the frame 1 is gradually enlarged toward both ends.

[0065] When the temples 11 are elastically deformed to open, the endpiece 12 is deformed to shift forward in accordance with the deformation of the temples 11, as shown in Fig. 6. At this time, since there is a gap between the frame 1 and the front frame 2 in the range from the portion of the shaft base ends 25 adjacent to the endpieces 12 to both ends, the endpiece 12 will not come into contact with the end of the front bar 22 even if it shifts forward.

[0066] On the other hand, the front bar 22 and the back bar 14 are in a state of almost contact with each other in the portion adjacent to the shaft base end portion 25 and the receiving portion 16. Therefore, when the temples 11 are opened and the endpiece 12 is gradually shifted forward, the portion where the front bar 22 and the back bar 14 are close to each other or in close contact with each other shifts toward the endpiece 12. Accordingly, the end of the front bar 22 also shifts forward in the same manner as the endpiece 12.

[0067] In this way, even if the temples 11 are widely opened, the end pieces 12 and the front bar 22 do not collide with each other to prevent the opening of the temples 11. Therefore, the temples 11 can exert a stable clamping force regardless of the size or shape of the wearer's head.

[0068] Furthermore, since the front bar 22 and the back bar 14 are in approximate contact with each other adjacent to the shaft base end 25 and the receiving portion 16, when the temples 11·11 are opened, the ends of the front bar 22 and the back bar 14 on the endpiece 12 side shift forward from the shaft base end 25 and the receiving portion 16, and the front bridge 23 and the bridge 13 side shift backward.

[0069] Therefore, when the temples 11 are opened, paying particular attention to the front bar 22, the front bar 22 supporting the lens 21 as a whole only shifts in a tilted manner, and no load is placed on the lens 21 itself or its coating, thereby reducing the risk of breakage.

[0070] As described above, the detachable flip-up glasses 100 of the present invention can be easily attached to and detached from the frame 1 simply by elastically bending and deforming the front frame 2, while the laterally extending shaft portion 26 is inserted into and attached to the bearing portion 17, making it difficult for the front frame 2 to come off inadvertently during use. In addition, the shaft base end 26 is configured to be receivable into the receiving portion 16, and the front bar 22 and the back bar 14 are close to or in close contact with each other in the areas adjacent to the shaft base end 25 and the receiving portion 16, so that the shaft portion 26 is hidden and not visible when installed, and no unnecessary gaps are created around the rotating shaft, preventing an unsightly appearance. Furthermore, by forming the front bar 22, the shaft base end portion 25, and the shaft portion 26 seamlessly as one piece, the number of parts can be reduced, making it possible to manufacture the product at low cost.

[0071] 『Variation 1』 Next, detachable flip-up glasses 101 according to a modified example of the present invention will be described with reference to Fig. 7. In the following description, the same parts are designated by the same reference numerals, and duplicated descriptions will be omitted.

[0072] This modified example has the same configuration as that shown in FIG. 1, but differs in that, as shown in FIG. 7, the receiving portion 16 of the back bar 14 of the frame 1 is not concave, but has a stepped shape that is bent backward when viewed in a plane.

[0073] 1 in plan view from the endpiece 12 side to the shaft base end 25 of the front bar 22. However, from a position corresponding to the shaft base end 25, it bends rearward in accordance with the amount of protrusion of the shaft base end 25, and is connected to the bridge 13 in approximately parallel from there. The step caused by this bending is shaped to fit the shaft base end 25 , thereby forming the receiving portion 16 . A bearing portion 17 which is a circular hole is provided on the side surface of the receiving portion 16 .

[0074] When the temples 11 are opened, the front bar 22 and the back bar 14 are in approximate contact with each other at the portions adjacent to the shaft base end portion 25 and the receiving portion 16, as shown in Fig. 6. Therefore, when the temples 11 are opened and the endpiece 12 is gradually shifted forward, the portion where the front bar 22 and the back bar 14 are in contact with each other shifts toward the endpiece 12. Accordingly, the end of the front bar 22 also shifts forward in the same manner as the endpiece 12.

[0075] However, in this modified example, the back bar 14 is bent rearward, creating a gap between the portion of the frame 1 extending from the receiving portion 16 to the bridge 13 and the portion of the front frame 2 extending from the shaft base end portion 25 to the front bridge 23. Therefore, although the portion of the front bar 22 on the front bridge 23 side shifts rearward, the portion of the back bar 14 on the bridge 13 side does not come off.

[0076] As a result, the portion of the front bar 22 on the front bridge 23 side is more likely to shift rearward and tilt, so that the load on the lens 21 itself and its coating can be further reduced.

[0077] 『Variation 2』 Next, detachable flip-up glasses 102 according to another modified example of the present invention will be described with reference to FIG. In this modified example, as shown in FIG. 8, the shaft base end portion 25 and shaft portion 26 are provided on the frame 1 side, while the receiving portion 16 and bearing portion 17 are provided on the front frame 2 side, which is different from the form shown in FIG.

[0078] Even in this modified example, when attaching the front frame 2, the front frame 2 can be elastically curved and deformed to shorten the distance between the bearing portions 17, 17 and attach it to the shaft portions 26, 26 on the frame 1 side. The same applies to removal.

[0079] 『Variation 3』 Next, detachable flip-up glasses 103 according to another modified example of the present invention will be described with reference to FIG. As shown in FIG. 9, this modified example differs from the embodiment in FIG. 1 in that the shaft portion 25 extends toward the front bridge 23 side.

[0080] In the case of this modified example, when attaching the front frame 2, the front frame 2 is curved so that both ends thereof are displaced forward and the front bridge 23 is displaced rearward. This allows the shafts 26 to be attached to the bearings 17 on the frame 1 side with a large distance between them. The same applies to removal.

[0081] The present invention is not limited to the above embodiment. For example, one of the left and right shaft portions may extend toward the endpiece side, and the other may extend toward the front bridge side. Also, the front bar and the back bar may be configured so that only the portions adjacent to the temple ends of the left and right shaft base ends are in close or in tight contact with each other, and the other portions are spaced apart. [Explanation of symbols]

[0082] 100,101,102,103 Detachable flip-up glasses 1 Frame 11. Temple 12 Wisdom 13. Bridge 14 Back Bar 141 Front 142 Top surface 143 Back 144 Bottom surface 15 Nose pad 16 Reception Department 161 Side wall 17 Bearing section 2 Front frame 21 Lens 22 Front Bar 23 Under Rim 24 Front Bridge 25 Proximal end of shaft 26 Shaft 27 Stopper 271 Bottom surface

Claims

1. A detachable flip-up eyeglass comprising a front frame made of an elastic material for holding a lens, and a frame for supporting the front frame in a detachable and flip-up manner, The front frame includes a front bar provided above the lens, A plurality of shaft base ends protruding rearward are arranged at a predetermined interval from the rear side of the front bar, and a shaft portion is provided extending in either the left or right direction from the tip end of each of the shaft base ends. The front bar, the shaft base ends, and the shaft portion are formed seamlessly as a single unit. The frame includes a back bar located opposite the front bar, The removable flip-up eyeglasses are characterized in that the back bar is provided with a plurality of receiving portions arranged to be able to receive each of the shaft base ends, and bearing portions arranged on the side walls of each of the receiving portions.

2. A detachable flip-up eyeglass comprising a front frame made of an elastic material for holding a lens, and a frame for supporting the front frame in a detachable and flip-up manner, The frame is provided with back bars between the left and right ends, A plurality of shaft base ends protruding forward are arranged at predetermined intervals from the front side of the back bar, and a shaft portion extending in either the left or right direction is provided from the tip end of each of the shaft base ends, The back bar, the shaft base end, and the shaft portion are formed seamlessly as one piece. The front frame includes a front bar facing the back bar, The removable flip-up eyeglasses are characterized in that the front bar is provided with a plurality of receiving portions arranged to be able to receive each of the shaft base ends, and bearing portions arranged on the side walls of each of the receiving portions.

3. The removable flip-up eyeglasses described in claim 1 or claim 2, characterized in that the receiving portion is configured with a depth capable of accommodating almost the entire base end of the shaft, so that when the front frame is lowered, the back surface of the front bar and the front surface of the back bar are close to or in close contact with each other in the portion adjacent to the base end of the shaft and the receiving portion, and the back surface of the front bar and the front surface of the back bar are spaced apart in the portion on the temple side of the base end of the shaft and the portion adjacent to the receiving portion.

4. The detachable flip-up eyeglasses according to claim 1 or 2, characterized in that the front bar is configured such that, when viewed from the front with the front bar lowered, the back bar is entirely covered by the front bar.

5. A stopper protruding rearward from the rear side of the front bar is seamlessly and integrally provided on the front bar, When the front bar is lowered, the stopper contacts the upper or lower surface of the back bar, 3. The detachable flip-up eyeglasses according to claim 1, wherein the stopper contacts a surface other than the upper surface or the lower surface of the back bar when the front bar is flipped up.

Images