Flip up spectacle frame

Abstract

To provide a flip up spectacle frame which facilitates fitting work of a front frame to a front bar, can reduce the number of components, and achieve a compact frame design without discomfort.SOLUTION: A front frame 2 is formed of an elastically deformable material. On each of upper back faces of left and right rims 21 of the front frame 2, a female die second hinge piece with a shaft hole 23a, or a male die second hinge piece 23 whose shaft part is laterally outwardly provided, is formed. On a rear position of each of the left and right rims 21 of the front frame 2 on the front bar 1, a recess 11a which is partially bent rearward, is formed, and on a front face of the recess 11, a male die first hinge piece whose shaft part 13a is laterally inwardly provided, or a female die first hinge piece 13 having a shaft hole, is formed. To the first hinge piece 13, the second hinge piece 23 is hinge-coupled by inserting the shaft part into the shaft hole, in a state of curving the front frame 2 in a cross direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a flip-up type eyeglass frame that can be used by flipping up the front frame. [Background technology]

[0002] In the case of corrective glasses, reading glasses, sunglasses, etc., it is common to remove the glasses once when they are no longer needed, and then put them back on when they are needed again, but the task of frequently removing and putting on glasses is very bothersome for the user. In the case of sunglasses, removing and putting them on while driving or playing sports can also cause a loss of concentration. In addition, a place to put the removed glasses is required, so it is difficult to remove the glasses when there is no place to put them.

[0003] Therefore, flip-up eyeglass frames in which the front frame is attached to the front bar so that it can be flipped up freely have been known in the past (see, for example, Patent Documents 1 to 3). However, in typical flip-up eyeglass frames, a hinge is interposed between the front frame and the front bar, creating a large gap between the two, which not only makes it easy for the lens to move away from the front bar due to the gap, but also destroys the sense of unity between the front frame and the front bar, making the design look unnatural.

[0004] Meanwhile, a flip-up eyeglass frame has been proposed in the past, in which a recess is formed in the front bar and hinges are connected within this recess (see Patent Document 4). However, this conventional eyeglass frame requires that the male hinge piece of the front frame be inserted into the female hinge piece formed in the recess of the front bar and then screwed in place, but it is difficult to insert screws into the recess, making it difficult to attach the front frame. In addition, the number of parts increases due to the screws, which is also a cost issue. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Utility Model Application Publication No. 2-21622 [Patent Document 2] JP 2001-91905 A [Patent Document 3] JP 2002-23112 A [Patent Document 4] JP 2001-221980 A Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention aims to solve the problems of the conventional technology described above, and in summary, to provide a flip-up type eyeglass frame that simplifies the attachment of the front frame to the front bar, reduces the number of parts required, and realizes a compact frame design that does not look unnatural. [Means for solving the problem]

[0007] As a means for solving the above-mentioned problems, the inventor has adopted a configuration in which, in a flip-up type eyeglass frame comprising a front bar 1 to which left and right temples are attached on both sides, and a front frame 2 disposed in front of the front bar 1 and hingedly connected to the front bar 1, the front frame 2 is made of an elastically deformable material, and a second hinge piece 23, which is female type with an axis hole 23a, or a male type with an axis portion facing outward to the left and right, is formed on the upper back surface of the left and right rims 21 of the front frame 2, while a recess 11a that is partially bent backwards is formed at a rear position of the left and right rims 21 of the front frame 2 in the front bar 1, and a first hinge piece 13, which is male type with an axis portion 13a facing inward to the left and right, or a female type with an axis hole, is formed on the front surface of each of these recesses 11, and the second hinge piece 23 is hinged to the first hinge piece 13 by inserting the axis portion into the axis hole while the front frame 2 is bent and deformed back and forth (the effects will be described later).

[0008] Furthermore, in the present invention, it is preferable that, when the front frame 2 is removed from the front bar 1 and lined up front and rear with the left and right center positions aligned, the left and right second hinge pieces 23 of the front frame 2 are positioned left and right outboard of the first hinge piece 13 of the front bar 1. In this way, if the front frame 2 is attached to the front bar in a curved state, a biasing force acts on the second hinge pieces 23 in the left and right outward directions due to the elastic restoring force of the front frame 2, and an appropriate amount of sway (rotational resistance) can be generated in the hinge portion.

[0009] In the present invention, it is preferable that the depth of the front and rear recesses in the left and right recesses 11a of the front bar 1 is made to match or approximate the forward protrusion amount of the first hinge piece 13. This makes it possible to minimize the gap between the front bar 1 and the front frame 2 on the bridge side.

[0010] In the present invention, the male hinge piece of the first hinge piece 13 and the second hinge piece 23 is composed of a shaft portion 13a and a shaft base portion 13b, and a fitting protrusion portion 13c is formed on the contact surface of the shaft base portion 13b with the female hinge piece, while the female hinge piece is composed of a shaft hole 23a and a tubular portion 23b on its outer periphery, and a plurality of fitting recesses 23c corresponding to the fitting protrusion portion 13c are formed at different positions on the contact surface of the tubular portion 23b with the male hinge piece, and a protruding cam portion 23d is formed between adjacent fitting recesses 23c, so that when the front frame 2 is flipped up, the fitting protrusion 13c can be moved from within a given fitting recess 23c through the protruding cam portion 23d into another fitting recess 23c. This allows the front frame 2 to be flipped up and returned smoothly by utilizing the urging force of the female hinge piece in the left and right outward directions, and the flipped-up front frame can be fixed at a given angle. Effect of the Invention

[0011] In the present invention, a first hinge piece provided within the recess of the front bar and a second hinge piece provided on the front frame are hingedly connected without screws, and the front frame is made from an elastically deformable metal frame that can be hingedly connected while being curved and deformed back and forth.This makes it possible to minimize the gap between the front bar and the front frame, thereby achieving a compact frame design that does not lose the sense of unity between the two.

[0012] In addition, the flip-up type eyeglass frame of the present invention does not require screws in the hinge section, which reduces the number of parts and solves cost issues.Furthermore, since there is no need to insert screws into the recesses, the front frame can be easily attached by simply bending the front frame and inserting the shaft portion of one hinge piece into the shaft hole of the other hinge piece. [Brief description of the drawings]

[0013] [Figure 1] 1 is an overall plan view showing a flip-up type eyeglass frame according to a first embodiment of the present invention; [Diagram 2] 1 is an overall plan view showing a disassembled state of a flip-up type eyeglass frame according to a first embodiment of the present invention; [Diagram 3] FIG. 2 is an explanatory diagram showing a state in which the front frame of the first embodiment of the present invention is attached to a front bar. [Figure 4] 3 is an enlarged explanatory diagram showing a first hinge piece of a front bar and a second hinge piece of a front frame in the first embodiment of the present invention. FIG. [Diagram 5] 2 is an enlarged explanatory view showing the hinge structure between the front bar and the front frame of the first embodiment of the present invention, and a cross-sectional view taken along the line XX. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] "First embodiment" A first embodiment of the present invention will be described with reference to Fig. 1 to Fig. 5. In the drawings, reference numeral 1 denotes a front bar, reference numeral 2 denotes a front frame, reference numeral F denotes an eyeglass frame, reference numeral H denotes a hinge portion, and reference numeral N denotes a nose pad.

[0015] "Configuration of flip-up eyeglass frames" [1] Basic structure of eyeglass frames First, the basic structure of the flip-up eyeglass frame F of this embodiment will be described. In this embodiment, as shown in Figures 1 and 2, a front frame 2 is disposed in front of a front bar 1, and this front frame 2 is hinged to the front bar 1 so as to be freely rotatable in the vertical direction to form the eyeglass frame F. The front frame 2 is made of an elastically deformable metal frame, and can be attached to the front bar 1 in a state in which the front frame 2 is curved back and forth as shown in Figure 3. Although not shown, temples, which are ear hooks, are attached to both the left and right sides of the front bar 1.

[0016] Furthermore, the left and right bars 11 of the front bar 1 shown in Fig. 2 are each formed with a recess 11a partially bent backward, and a male first hinge piece 13 with an axle 13a facing inward to the left and right as shown in Fig. 4(a) and (b) is formed on the front surface of these recesses 11. Meanwhile, a female second hinge piece 23 with an axle hole 23a is formed on the upper back surface of the left and right rims 21 of the front frame 2 shown in Fig. 2, and the axle 13a of the first hinge piece 13 is inserted into the axle hole 23a of this second hinge piece 23 for pivotal support to form the hinge connection part shown in Fig. 5.

[0017] With the above configuration, the second hinge piece 23 of the front frame 2 can be hinged within the recess 11a formed at the rear position of the left and right rims 21, thereby minimizing the gap that occurs between the left and right bars 11 of the front bar 1 and the left and right rims 21 of the front frame 2. In addition, since the front bar 1 and the front frame 2 can be hinged without screws, the front frame 2 can be easily attached to the front bar 1.

[0018] [2] Materials for the front bar and front frame Regarding the materials of the front bar 1 and the front frame 2, in this embodiment, a metal material (e.g., titanium, titanium alloy, nickel silver, aluminum, gold, stainless steel, etc.) is used for the front bar 1, but any metal material used for a metal frame can be used as appropriate, and resins (e.g., acetate resin, polyamide resin, polyimide resin, etc.) used for a plastic frame can also be used. Furthermore, the front bar 1 and the front frame 2 can be made not only of a plastic frame or a metal frame, but also of a combination frame that combines a plastic material and a metal material, and different materials can be used for the front bar 1 and the front frame 2.

[0019] [3] Overall shape of the front bar Regarding the shape of the front bar 1, in this embodiment, the shape of the left and right bar parts 11 in plan view is a shape that is slightly inclined backward as a whole, and the shape of the left and right bar connecting part 12 connecting the left and right bar parts 11 is a shape that is curved forward in plan view, as shown in Fig. 2. Also, on both sides of the left and right bar connecting part 12 of the front bar 1, clings 14 are provided on the back side, and nose pads N are attached to the tips of the clings. Also, on both left and right ends of the front bar 1, end pieces 15 bent backward are formed, and hinge pieces of the end pieces 15 can be connected to hinge pieces at the base ends of the temples.

[0020] In this embodiment, the recesses 11a are formed in the left and right central portions of the left and right bar portions 11, but the position of the recesses 11a can be changed as appropriate according to the left and right positions of the second hinge pieces 23 of the front frame. In this embodiment, as shown in FIG. 2, the shape of the recesses 11a in plan view is such that inclined portions are formed on both the left and right sides of the recesses 11a, and the bottom portion of the recesses 11a sandwiched between the inclined portions is flat. Furthermore, the inclined portions on both the left and right sides of the recesses 11a are deeper on the left and right bar connecting portion 12 side (center side) than on the temple side (both end sides). This makes it difficult for the left and right bar portions 11 to come into contact with the left and right rims 21 when the temples are expanded.

[0021] In this embodiment, the depth of the front-rear recess (depth on the left-right bar connecting portion 12 side) in each of the left and right recesses 11a of the front bar 1 is made to approximate the forward protrusion amount of the first hinge piece 13. This allows the second hinge piece 23 of the front frame 2 to be contained within the recess 11a, minimizing the gap between the bridge 22 of the front frame 2 and the left-right bar connecting portion 12 of the front bar 1. The depth of the front-rear recess in each recess 11a can also be made to match the forward protrusion amount of the first hinge piece 13, in which case the size of the gap can be adjusted by the forward protrusion amount of the first hinge piece 13.

[0022] [4] First hinge piece of the front bar In this embodiment, the first hinge piece 13 of the front bar 1 is a male hinge piece, but when the second hinge piece is a male hinge piece, it can be a female hinge piece having an axial hole. In this embodiment, as shown in Figures 4(a) and 4(b), the first hinge piece 13 is composed of an axial portion 13a protruding in the left-right direction and an axial base portion 13b formed at the base portion of the axial portion 13a, and further, a fitting protrusion portion 13c is partially formed on the contact surface of the axial base portion 13b with the second hinge piece 23 (female hinge piece).

[0023] Regarding the shape of the fitting protrusion 13c, in this embodiment, as shown in Fig. 4(a)(b), a portion of the shaft base 13b located below the shaft portion 13a is formed in a stepped shape raised in the protruding direction of the shaft portion 13a. Also, in this embodiment, the width of the fitting protrusion 13c is made the same as the width of the shaft portion 13a, so that the fitting protrusion 13c can be easily formed by cutting. Note that the position, number, and shape of the fitting protrusion 13c are not limited thereto and can be appropriately changed according to the shape of the corresponding second hinge piece 23 (described in detail later).

[0024] 4(a) and (b) is a part for attaching to the left and right bar parts 11, and the left and right central parts of the left and right bar parts 11 are fitted into this U-shaped part and soldered to form the first hinge piece 13 on the front bar 1. Also, by adjusting the forward protrusion amount of the shaft base 13b and the front-rear position of the shaft part 13a, the size of the gap between the front bar 1 and the front frame 2 can be appropriately adjusted.

[0025] [5] Overall shape of the front frame Regarding the shape of the front bar 2, in this embodiment, the shape of the left and right rims 21 in a plan view in the unattached state shown in Fig. 2 is made to be flatter with less rearward inclination than the left and right bar parts 11. By attaching this front frame 2 to the front bar 1 in a curved state as shown in Fig. 3, the left and right rims 21 are made to have a shape that is inclined rearward to the same extent as the left and right bar parts 11 as shown in Fig. 1. Also, the bridge 22 of the front frame 2 is curved forward like the left and right bar connecting parts 12 of the front bar 1.

[0026] In this embodiment, a full-rim shape that surrounds the entire periphery of the lens is adopted for the left and right rims 21 of the front frame 2, but a half-rim shape with only the upper part can also be adopted as long as the rim shape has an upper side part where the second hinge piece 23 is formed. Also, in this embodiment, the screw fastening parts of the full-rim type left and right rims are formed on the left and right outer sides (temple side), and these screw fastening parts are arranged to be located below the end piece 15 when the front frame 2 is attached to the brow bar 1.

[0027] [6] Second hinge piece of the front frame The second hinge pieces 23 of the front frame 2 are arranged so that, when the front frame 2 is removed from the front bar 1 and lined up front and back with the left and right center positions aligned as shown in Fig. 2, the left and right second hinge pieces 23 of the front frame 2 are positioned outside (towards the temple) to the left and right of the first hinge piece 13 of the front bar 1. As a result, when the front frame 2 is attached to the front bar in a curved state, a biasing force acts on the second hinge pieces 23 in the left and right outward directions due to the elastic restoring force of the front frame 2 as shown in Fig. 3, creating an appropriate amount of sagging in the hinge portion.

[0028] In this embodiment, a female hinge piece having an axis hole 23a is used for the second hinge piece 23, but it is also possible to use a male hinge piece having an axis by reversing the gender. In this embodiment, as shown in Figures 4(c) and (d), the second hinge piece 23 is composed of an axis hole 23a and a cylindrical portion 23b on its outer periphery, and furthermore, a plurality of fitting recesses 23c are formed at different positions on the contact surface of the cylindrical portion 23b with the first hinge piece 13 (male hinge piece). Furthermore, a protruding cam portion 23d is formed between adjacent fitting recesses 23c.

[0029] Regarding the shape of the fitting recesses 13c, in this embodiment, as shown in Fig. 4(c)(d), two fitting recesses 13c are formed in a portion located below the shaft hole 23a of the cylindrical portion 23b and on the rear side (tip side) of the shaft hole 23a. The relative positional relationship of these fitting recesses 13c is formed in accordance with the flip-up angle of the front frame 2. In this embodiment, the width of the two fitting recesses 23c is made the same as the width of the shaft hole 23a, which makes it easy to form the fitting recesses 23c by cutting. The position, number, and shape of the fitting recesses 23c are not limited to these and can be appropriately changed according to the shape of the corresponding first hinge piece 13.

[0030] 4(b) and (c) is a portion for mounting to the left and right rims 21, and this left portion is brazed to the upper back surfaces of the left and right rims to form the second hinge piece 23 on the front frame 2. Also, by adjusting the amount of rearward projection of the tubular portion 23b and the front-rear position of the shaft hole 23a, the size of the gap between the front bar 1 and the front frame 2 can be adjusted as appropriate.

[0031] [7] Hinge structure consisting of a first hinge piece and a second hinge piece The hinge structure formed by the first hinge piece 13 of the front bar 1 and the second hinge piece 23 of the front frame 2 will now be described. As shown in Figures 1 and 5(a), the shaft portion 23 of the first hinge piece 13 of the front bar 1 is inserted into the shaft hole 2 of the second hinge piece 23 of the front frame 2 from the inside (bridge side) to the outside (temple side) to form a hinge connection. At this time, no screws or the like are used, and the attachment is performed by utilizing the elastic deformation of the front frame as shown in Figure 3.

[0032] In a state where the front frame 2 is not flipped up (a state where the front bar 1 and the front frame 2 are arranged parallel to each other), as shown in Fig. 5(b), the fitting convex portion 13c of the first hinge piece 13 is inserted into one of the fitting recesses 23c of the second hinge piece 23 and is fixed in place by the elastic repulsive force of the curved front frame 2. When the front frame 2 is flipped up from this state and the second hinge piece 23 rotates, as shown in Fig. 5(c), the fitting convex portion 13c of the first hinge piece 13 moves into the other fitting recess 23c of the second hinge piece 23 and is fixed in place by the elastic repulsive force of the curved front frame 2.

[0033] When the fitting protrusion 13c of the first hinge piece 13 is moved from one fitting recess 23c shown in Fig. 5(b) to the other fitting recess 23c shown in Fig. 5(c), it moves through the intermediate protruding cam portion 23d. Since this protruding cam portion 23d has inclined portions formed on both ends, when a force is applied to rotate the front frame 2 upward or downward, the direction of the force is converted by the inclined portions into the extension direction (opposite to the curvature direction) of the front frame 2. This allows the fitting protrusion 13c to move along the protruding cam portion 23d from one fitting recess 23c to the other fitting recess 23c.

[0034] The above hinge structure of the eyeglass frame F of this embodiment allows the front frame 2 to be flipped up and returned smoothly, and the flipped-up front frame can be fixed at a predetermined angle. In this embodiment, the second hinge portion 23 has two fitting recesses 23c, but it can also have three or more fitting recesses, in which case the flip-up angle of the front frame 2 can be fixed in stages. [Explanation of symbols]

[0035] 1 Front Bar 11 Left and right bar section 11a Recess 12 Left and right bar connection 13 First hinge piece 13a Shaft 13b Axial base 13c Fitting protrusion 14 Clings 15 Armor Section 2 Front frame 21 Left and right rims 22 Bridge 23 Second hinge piece 23a Shaft hole 23b Cylinder part 23c Fitting recess 23d Convex cam part F Glasses Frame N Nose pad

Claims

1. A flip-up eyeglass frame including a front bar to which left and right temples are attached on both sides, and a front frame disposed in front of the front bar and hinged to the front bar, The front frame is made of an elastically deformable material, and a female second hinge piece having an axis hole or a male second hinge piece having an axis portion facing outward on the left and right sides is formed on the upper back surface of the left and right rims of the front frame. A flip-up eyeglass frame in which a partially backward-bent recess is formed at the rear position of the left and right rims of the front frame on the front bar, and a first hinge piece, which is either male with an axis facing inward to the left and right, or female with an axis hole, is formed on the front of each of these recesses, and the second hinge piece is hinged to the first hinge piece by inserting the axis into the axis hole while the front frame is bent and deformed back and forth.

2. The flip-up eyeglass frame of claim 1, wherein when the front frame is removed from the front bar and arranged front to back with the left and right center positions aligned, the left and right second hinge pieces of the front frame are positioned outside the left and right first hinge pieces of the front bar.

3. 3. The flip-up eyeglass frame according to claim 2, wherein the depth of the front and rear recesses in the left and right recesses of the front bar is equal to or close to the forward protrusion of the first hinge piece.

4. In the first hinge piece and the second hinge piece, the male hinge piece is composed of a shaft portion and a shaft base portion, and a fitting protrusion portion is formed on the contact surface of the shaft base portion with the female hinge piece, The female hinge piece is composed of an axis hole and a cylindrical portion around the axis hole, and a plurality of fitting recesses corresponding to the fitting protrusions are formed at different positions on the contact surface of the cylindrical portion with the male hinge piece, and a protruding cam portion is formed between adjacent fitting recesses, 3. The flip-up eyeglass frame according to claim 1, wherein, when the front frame is flipped up, the fitting protrusion moves from a given fitting recess into another fitting recess through a protruding cam portion (22d).

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