JP2017122863A - Hingeless spectacle frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hingeless spectacle frame that can be easily stored and carried while a temple is closed, has a high fit feeling during wearing with a suitable energizing force, and has a long service life, a high safety, and a high design property.SOLUTION: In a hingeless spectacle frame, end pieces E on both sides of front frame F are interconnected and right and left temples T are interconnected without hinges. A leaf spring portion 1 semi-circularly curved toward the inside is disposed on the base end side of each of the right and left temples T, and a temple body 2 is connected to the rear ends of the leaf spring portions 1 in a state in which the temple body is inward closed. Each leaf spring portion 1 is overall bent into a shape close to a circle from the state in which the temple body 2 is closed, thereby allowing the temple body 2 to expand to a position forming a right angle with respect to at least the front frame F.SELECTED DRAWING: Figure 1

Description

  The present invention is an improvement of a hingeless eyeglass frame, more specifically, it can be easily stored or carried with the temple closed, has a good fit when worn, and has a long life and safety and design. Is also related to an excellent hingeless eyeglass frame.

  As is well known, eyeglass frames are often carried by folding temples when not in use, so it is common to have hinges for folding temples on both sides of the front frame. The structure not only increases the number of parts, but also makes the frame thinner and lighter because the hinge is thicker.

  Therefore, in the past, the temples are repeated without a hinge by connecting the front frame and the temple using a spring portion (such as a torsion spring or a curved leaf spring) that can be bent and deformed greatly within the elastic limit. A hingeless eyeglass frame that can be opened and closed has also been developed (see, for example, Patent Document 1).

  However, since the conventional hingeless spectacle frame has a structure in which the state where the temple is opened is in the normal state, the spectacle frame must be forcibly housed in the case with the spring portion bent largely, which is convenient. Was bad. Also, when taking out, problems such as the eyeglass frame jumping out of the case and falling easily occurred.

  Patent Document 1 also proposes a device for maintaining the temple in a closed state by providing a recess in the temple modern portion and fitting the recess into the spring portion. In addition to the limited design of the modern part, there was a danger that the temple suddenly opened and hit the hand or face when the modern part was unexpectedly removed from the spring part.

  On the other hand, some of the conventional spring hinge mechanisms include a curved semi-elliptical leaf spring (see Patent Document 2). However, when considering application to a hingeless eyeglass frame, Since the leaf spring of this kind has a shape in which bending deformation occurs locally, it is difficult to bend and deform with a size that allows the temple to be opened and closed with a narrow elastic limit range.

  The semi-elliptical leaf spring has a problem in terms of product life because not only fatigue is easily concentrated near the apex where the curvature is large, but also spring sag is likely to occur when it is repeatedly bent and deformed. there were. Moreover, the semi-elliptical leaf spring has a drawback that the urging force (clamping force) becomes excessive when it is largely bent, and the wearing feeling is impaired.

JP2013-97102A Japanese Patent No. 4824475

  The present invention has been made in view of the above-mentioned problems in the prior art, and the object of the present invention is not only that the temple can be easily stored and transported with the temple closed, but also an appropriate attachment. The object is to provide a hingeless spectacle frame that is excellent in fit when worn by power, and that has a long life and excellent safety and design.

  Means employed by the present inventor for solving the above technical problem will be described with reference to the accompanying drawings.

  That is, according to the present invention, in the hingeless spectacle frame in which the end pieces EE on both sides of the front frame F and the left and right temples T and T are connected without using a hinge, respectively, The leaf spring portions 1 and 1 curved in a semicircular shape toward the inside are provided, and the temple body portions 2 and 2 are connected to the rear ends of the leaf spring portions 1 and 1 in an inwardly closed state, From the state in which the temple body portions 2 and 2 are closed, the leaf spring portions 1 and 1 are bent and deformed as a whole so as to be close to a circular shape, so that the temple body portions 2 and 2 are at least perpendicular to the front frame F. It is characterized in that it can be expanded to the position. In the present specification, the direction in which the temples T and T are closed is defined as the inner direction, and the opening direction is defined as the outer direction.

  The “semi-circular shape” does not include a semi-elliptical shape having a locally large or small curvature, but to the extent that bending deformation generally occurs when external pressure is applied to both ends. As long as the curvature is uniform, the curvature is not completely constant. The “semicircular shape” includes not only an arc having a central angle of 180 ° but also an arc having a central angle of about 90 ° to 300 ° (preferably 135 ° to 225 °).

  As for the material of the leaf spring part 1 and the temple body part 2, it is preferable to use a metal material in order to obtain a lighter and slim frame design.

  In the present invention, the base end side region of the temple main body 2 is made of a metal plate, and the portions near the leaf spring portion 1 of the temple main body 2 are warped outward (convex inwardly). It is also possible to provide a warped part 22 to suppress the warp deformation of the temple body part 2 when the temple is expanded and to smoothly perform the bending deformation of the leaf spring part 1. it can.

  It should be noted that the means for providing the inwardly warped portion 22 in the temple main body portion 2 is more specifically the base end side when the base end side region of the temple main body portion 2 has a light-weight form in which warp deformation is likely to occur. This region is preferably applied when the vertical width is equal to or less than that of the leaf spring portion 1.

  On the other hand, in the present invention, the region on the proximal end side of the temple main body 2 is made of a metal plate having a vertical width larger than that of the leaf spring portion 1, and the side surface of the temple body portion 2 in the vicinity of the leaf spring portion 1. In addition, a U-shaped hole 23 having both ends facing the temple distal end side is formed, and the distal end of the convex plate piece 24 formed on the inner side of the U-shaped hole 23 and extending from the temple distal end side to the proximal end side. May be connected to the rear end of the leaf spring portion 1. Accordingly, the convex plate piece 24 having a small vertical width can be warped and deformed when the temple is expanded, so that the bending deformation of the leaf spring portion 1 can be suppressed. Therefore, the urging force of the temple T acting at the time of wearing can be appropriately adjusted.

  When the convex plate piece 24 is provided in the temple body 2, the convex plate piece 24 is equal to or less than the leaf spring portion 1 so that the warp deformation of the convex plate piece 24 easily occurs when the temple is expanded. It is preferable to form with a vertical width of.

  In the present invention, a pair of semicircular leaf spring portions is provided on both sides of the front frame, and the eyeglass frame is configured by connecting the temples inwardly with the rear ends of these leaf spring portions in an ordinary manner. Since the temple is closed in the state, it can be easily stored and carried in the case without bending and deforming the leaf spring, and the handling becomes easy.

  Moreover, in the present invention, there is no need to provide a fixing means as in the prior art, so that the design of the temple is not limited, and there is no problem that the temple suddenly opens, so that it can be used safely. Moreover, since there is no worry that the spectacle frame pops out when it is taken out from the case, it is difficult to cause a failure due to dropping of the spectacle frame.

  Further, in the present invention, the shape of the leaf spring part is a semicircular shape with a uniform curvature so that the whole is bent and deformed. Therefore, even when the temple is repeatedly opened and closed, accumulation of metal fatigue and spring sag are caused. Problems are unlikely to occur. In addition, in the present invention, since there is no fear that the urging force of the leaf spring portion suddenly increases due to bending deformation, a good fit can be obtained with an appropriate tightening force when worn.

  Therefore, according to the present invention, not only can it be composed of a small number of parts, but it can be provided with a hingeless spectacle frame that can be designed in a slim and lightweight design in terms of design, excellent in ease of handling, wearing feeling, and safety. The practical value of the present invention is very high.

It is a whole top view showing the spectacles frame in the state where the temple in Example 1 of the present invention was closed. It is an expansion perspective view showing the temple form of the closed state in Example 1 of this invention. It is the whole top view showing the spectacles frame in the state where the temple in Example 1 of the present invention opened. It is an expansion perspective view showing the temple form of the open state in Example 1 of this invention. It is the whole top view and whole side view showing the spectacles frame in the state which the temple in Example 2 of this invention closed. It is an expansion perspective view showing the temple form of the closed state in Example 2 of this invention. It is a whole top view showing the spectacles frame in the state where the temple in Example 2 of the present invention was opened. It is an expansion perspective view showing the temple form of the open state in Example 2 of this invention. It is a whole side view showing the spectacles frame in the state where the temple in the modification of the present invention was opened.

“Example 1”
A first embodiment of the present invention will be described with reference to FIGS. In the figure, what is indicated by the symbol G is a spectacle frame, and what is indicated by the symbol F is a front frame. Also, what is indicated by a symbol T is a temple, and what is indicated by a symbol 1 is a leaf spring portion. What is indicated by reference numeral 2 is the temple body.

“Configuration of eyeglass frames”
[1] Structure of Eyeglass Frame First, in this embodiment, as shown in FIGS. 1 and 2, the left and right temples T and T are connected to the end pieces E and E on both sides of the front frame F without using hinges, respectively. Thus, a hingeless spectacle frame G is configured. In the present embodiment, the front frame F is configured as a half rim type, but a full rim type can also be adopted, and a rimless type having only an end piece E and a bridge can also be adopted. In this embodiment, the front frame F is made of β-titanium and the end piece E is made of pure titanium. However, other titanium-based materials, white, gold, stainless steel, other alloys, Alternatively, one using a synthetic resin or the like can be adopted, and a combination frame using a non-metallic material in part can also be adopted.

[2] Structure of temple The temple T is composed of a leaf spring portion 1 provided on the base end side and a temple main body portion 2 connected to the rear end thereof as shown in FIGS. Yes. Each temple body 2 is connected to the rear end of the leaf spring portion 1 in an inwardly closed state. In addition, the connection angle of the temple main-body part 2 with respect to the leaf | plate spring part 1 will not be specifically limited if the front frame F and the temple main-body parts 2 * 2 are in the state near parallel.

[3] Material of the leaf spring portion As the material of the leaf spring portion 1, a metal material having an excellent elastic restoring force that does not decrease the restoring force even when used repeatedly is used. Specifically, in the present embodiment, β-titanium is adopted as the material of the leaf spring portion 1, but other titanium materials (particularly shape memory alloys), stainless steel materials, copper materials, etc. are adopted. In addition, synthetic resin materials (for example, superelastic resins such as polyamide resins and polyimide resins) can also be employed.

[4] Shape of Leaf Spring Part Each of the leaf spring parts 1 and 1 has a shape curved in a semicircular shape toward the inside. Specifically, in the present embodiment, the leaf spring portion 1 has a substantially constant curvature and has an arc shape with a slightly larger central angle than a semicircle, so that it can be easily deformed into a circle when in use. Further, the vertical width of the leaf spring portion 1 is also reduced in this embodiment so that the biasing force does not become too large, but the vertical width can be increased according to the material and the plate thickness. Further, the diameter of the arc of the leaf spring portion 1 can be freely changed as long as it does not interfere with the field of view.

[5] Material of the temple body part Further, with respect to the temple body part 2, the base end side region is made of a metal plate material, and the distal end side modern part 21 is covered with a resin material around the metal plate material. Forming. In the present embodiment, the metal plate material of the temple main body 2 is made of β-titanium, but like the front frame F, other titanium-based materials, white, gold, stainless steel, other alloys or A material using a synthetic resin or the like can also be used.

[6] Shape of Temple Main Body In this embodiment, in order to make the eyeglass frame G slimmer and lighter, the region on the base end side of the temple main body 2 is formed with the same vertical width as the leaf spring 1. However, as long as it has a minimum strength that can withstand use as the spectacle frame G, the vertical width of the region on the base end side is smaller than that of the leaf spring portion 1 depending on the material and thickness of the metal plate material. You can do it or you can make it bigger.

[7] Opening / closing function of the temple and the left and right temples T and T are configured as described above, so that the leaf spring portions 1 and 1 are bent and deformed from the state in which the temple main body portions 2 and 2 are closed, as shown in FIGS. As shown in FIG. 4, the temple main body portions 2 and 2 can be expanded to a position perpendicular to the front frame F. At this time, since the leaf spring portions 1 and 1 are bent and deformed so as to approach a circle, the urging force does not suddenly increase during the expansion operation, and the operation can be performed without difficulty. . Moreover, since the tightening does not become too strong for the same reason, the fit when worn is also good.

[8] Warp portion of temple main body and its function Further, in this embodiment, as shown in FIGS. 1 to 4, the portions of the left and right temple main body 2 in the vicinity of the leaf spring portion 1 are warped outward. A warped portion 22 is provided. Thereby, since the warp deformation of the temple main body part 2 at the time of temple expansion is suppressed, the force applied to the temple main body part 2 is efficiently transmitted to the leaf spring part 1, and the leaf spring part 1 is smoothly bent and deformed. be able to. In addition, when the area | region of the base end side of the temple main-body part 2 is made into the up-and-down width below equivalent to the leaf | plate spring part 1 like a present Example, the curvature deformation | transformation of the temple main-body part 2 at the time of expansion will occur easily. Therefore, the suppression effect of the warped portion 22 becomes more important.

“Example 2”
[1] Configuration of Temple Main Body A second embodiment of the present invention will be described below with reference to FIGS. In the second embodiment, as shown in FIGS. 5A, 5B and 6A, 6B, the region on the base end side of the temple main body 2 has a larger vertical width than the leaf spring portion 1. A U-shaped hole 23 is formed on the side surface in the vicinity of the leaf spring portion 1 of the temple main body portion 2 with both ends of the hole facing the temple tip side, and the inner side of the U-shaped hole portion 23. Further, a convex plate piece 24 extending from the distal end side of the temple to the proximal end side is formed. The tip of the convex plate piece 24 is connected to the rear end of the leaf spring portion 1 (other configurations and conditions are the same as those in the first embodiment).

[2] Function of the convex plate piece As a result, as shown in FIGS. 7 and 8, when the left and right temples T and T are expanded, the convex plate piece 24 having a smaller vertical width than the temple main body 2. Causes warping deformation, and the bending deformation of the leaf spring portion 1 can be suppressed correspondingly, so that the urging force acting on the temples T and T from the leaf spring portions 1 and 1 can be suppressed to an appropriate magnitude. Therefore, even when the region on the base end side of the temple main body 2 is made of a metal plate material having a large vertical width, the tightening force at the time of wearing does not become too strong, and a good fit can be obtained.

[3] Shape of the convex plate piece Further, in this embodiment, the convex plate piece 24 has the same vertical width as that of the leaf spring portion 1 so that the warp deformation of the convex plate piece 24 easily occurs when the temple is expanded. Although it is formed, it can be formed with a vertical width equal to or less than the leaf spring portion 1 according to the material, plate thickness, and length of the convex plate piece 24. Further, in this embodiment, by adjusting the length of the convex plate piece 24 by changing the length of the straight portion of the U-shaped hole at the time of designing, the ease of warping of the convex plate piece 24 can be adjusted appropriately. it can.

[4] Screw-fixing structure for resin parts In this embodiment, the metal plate material of the temple body 2 is thinly formed from the central portion to the tip side, and the thinly formed metal plate material is formed into a sheath-like resin. The temple main body 2 having high rigidity is configured by being inserted into the hollow part of the manufactured part P. Further, in this embodiment, the mounted resin part P is screwed to the metal plate material from the inside of the temple to prevent the resin part P from coming off (not shown).

“Production method for eyeglass frames”
The present invention is generally configured as described above. However, the present invention is not limited to the embodiments, and various modifications can be made within the description of “Claims”. As the manufacturing method, not only the individually produced end piece E, leaf spring member 1 and temple body 2 are integrated by brazing but also the end piece E and leaf spring member 1 or the leaf spring member 1 and temple. The main body 2 can be integrally molded to produce a single part.

  As for the method of forming the U-shaped hole 23 in the base end side region of the metal plate material constituting the temple main body 2, laser cutting can be preferably employed, but other punching and other machines Processing can also be employed. In addition, the bending method of the inwardly warped portion 22 of the leaf spring portion 1 and the temple main body portion 2 can also employ processing methods using various metal bender devices.

"Other forms of temple body"
Further, regarding the form of the temple main body portion 2 forming the U-shaped hole portion 23, if the metal plate material constituting at least the base end region has a larger vertical width than the leaf spring portion 1, FIG. As shown, the metal plate material constituting the central portion may have a tapered shape in which the vertical width gradually decreases, and any of the above belongs to the technical scope of the present invention.

  In recent years, there has been a great demand for a spectacle frame having a light weight and a simple design that provides a natural comfort and is not too strong in appearance. Under such circumstances, the hingeless eyeglass frame of the present invention is a useful technique that not only makes the frame lighter and simplifies the design but also excels in usability, and therefore has a very high industrial utility value.

1 Leaf spring 2 Temple body
21 Modern Department
22 Warpage
23 U-shaped hole
24 Convex plate piece G Eyeglass frame F Front frame E End piece T Temple P Resin parts

Claims (6)

A hingeless spectacle frame in which end pieces (E), (E) and left and right temples (T), (T) on both sides of a front frame (F) are connected without a hinge,
Leaf spring portions (1), (1) curved in a semicircular shape toward the inner side are provided on the base end sides of the left and right temples (T), (T), and the leaf spring portions (1), (1). The temple body portions (2) and (2) are connected to the rear end of the leaf spring portions (1) (2) and (2) when the temple body portions (2) and (2) are closed. A hingeless, characterized in that the temple body (2) (2) can be expanded to at least a position perpendicular to the front frame (F) by bending and deforming 1) as a whole. Glasses frame.   2. A hingeless spectacle frame according to claim 1, wherein a metal material is used for the leaf spring portion (1) and the temple body portion (2).   The region on the base end side of the temple body portions (2) and (2) is made of a metal plate, and the temple body portions (2) and (2) are exposed outwardly in the vicinity of the leaf spring portions (1) and (1). Warping portions (22) and (22) warped to prevent warping deformation of the temple body portions (2) and (2) when the temples are expanded by the warping portions (22) and (22). The hingeless spectacle frame according to claim 1 or 2, wherein the frame is a hingeless spectacle frame.   4. The hingeless spectacle frame according to claim 3, wherein a region on the base end side of the temple body (2) is formed with a vertical width equal to or less than that of the leaf spring portion (1).   The region on the base end side of the temple body (2) is composed of a metal plate having a larger vertical width than the leaf spring (1), while the region near the leaf spring (1) of the temple body (2). The side surface is formed with a U-shaped hole portion (23) whose both ends face the temple distal end side, and is further formed on the inner side of the U-shaped hole portion (23) and extending from the temple distal end side to the proximal end side. The hingeless spectacle frame according to claim 1 or 2, wherein a tip of the plate-like plate piece (24) is connected to a rear end of the leaf spring portion (1).   6. The hingeless spectacle frame according to claim 5, wherein the convex plate piece (24) of the temple body (2) is formed with a vertical width equal to or less than that of the leaf spring portion (1).