JP3024326U - Leaf spring hinge used for eyeglass frames - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To have an ear hook temple elastically held in a folded state or in a normally opened state, while having a simple structure and excellent in functionality and durability.
Moreover, it is necessary to provide leaf spring hinges for eyeglass frames in which the springs can be replaced. SOLUTION: A piece part 1 having cam surfaces 11 and 12 formed at its tip is provided at the end of an end piece E at the left and right ends of a spectacles front frame F, while the piece is provided at the base of an ear hanging temple T. A two-piece component 2 which can be hingedly connected is provided on the component 1, and a leaf spring 3 whose both end portions 31 and 32 can swing is pivotally supported on the two-piece component 2 and an end portion 32 on the end piece side thereof. We have adopted a means to bring the cam surfaces 11 and 12 into urging contact.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention is an improvement of a spring hinge used for a spectacle frame, and more specifically, it can elastically hold an ear hook template in a folded state or a normally opened state with respect to a spectacle front frame. The present invention relates to a leaf spring hinge for an eyeglass frame, which has a simple structure and is excellent in functionality and durability.

[0002]

[Prior art]

 The spring hinges for spectacle frames use a spring mechanism in the hinge part that hinges the end pieces at both ends of the spectacles front frame to the ear hook temples so that the ear hook temples can be folded with respect to the front frame, or It is configured so that it can be elastically retained in each of the normally open use states, and if necessary, the temples can be elastically expanded further outward from the normally open state (hereinafter referred to as the outer expansion). It is configured to be able to.

Since the temples can be elastically opened and closed in this manner, the temples do not stop halfway during folding when handling eyeglasses, a lighter temple opening and closing operation is possible, and the temples are expanded outside. Since it can be opened, even if an unreasonable force is applied to the temple part from the outside, the external force can be absorbed by the spring hinges to prevent the front frame of the glasses from being deformed.

However, most of the conventional spring hinges are constructed by internally incorporating a spring body and other parts that allow elastic opening and closing of the temple into the hinge parts, which significantly complicates the structure. Assembling work also took time and resulted in high manufacturing cost of the spring hinge. Further, since the structure is complicated and each component such as the spring body is minute, it is not easy to replace each component, and there is a problem in terms of durability.

[0005]

The present invention has been made in view of the above-described problems of the spring hinge, and the ear hook temple is folded with respect to the front frame of the eyeglasses. Alternatively, it is possible to provide a leaf spring hinge for an eyeglass frame, which has a simple structure and excellent functionality and durability, while having the function of elastically holding each in the normally open state, and having a replaceable spring. This is the first technical issue.

A second technical problem of the present invention is, in addition to the above-mentioned first technical problem, to reliably regulate the outward expansion of the temple within a predetermined angle without complicating the structure. It is to provide leaf spring hinges for eyeglass frames that can be used.

[0007]

[Means for Solving the Problems]

 In order to solve the above first technical problem, the present invention foldably connects an ear hook temple T to the carry-out side ends of the end pieces E provided at the left and right ends of the spectacle front frame F. A spring hinge, which is provided at the end of the end piece E on the carry-out side, and has a piece component 1 having a first cam surface 11 and a second cam surface 12 at the tip thereof; and a base end of the temple T. A two-piece piece component 2 which has two piece pieces 21 and 21 which are to be hinge-connected by sandwiching the piece component 1 from above and below, and a notch 22 is formed between these piece pieces 21 and 21; The two pieces 31 of the two-piece piece component 2 are rotatably supported between the pieces 21, 21, and both ends 31 and 32 of the cutout 22 are swingable spring bodies, and the temple-side end 31 thereof. Is supported by the contact surface 23 formed in the inner part of the cutout portion 22, and the end portion 32 on the end piece side is the first cam of the piece component 1. A leaf spring 3 which comes into contact with the surface 11 or the second cam surface 12 in a biased state; and the bending elastic biasing force of the leaf spring 3 is applied to the first cam surface 11 or the second cam surface 12 of the piece part 1. The technical means is adopted in which the temple T is elastically held at the required temple opening / closing position with respect to the front frame F by acting on the front frame F.

Further, in order to solve the above-mentioned second technical problem, the present invention forms a contact step 11a at a required position of the first cam surface 11 of the piece component 1 and attaches the temple T to the front frame F. On the other hand, when it is further expanded outward from the normally opened state, the end 32 of the leaf spring 3 on the end piece side is abutted against the hit step 11a, so that the expansion of the temple T is expanded by a predetermined angle. It adopted the technical means of regulating within.

[0009]

[Embodiment of device]

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings. 1 is a schematic plan view showing an eyeglass frame to which an eyeglass frame leaf spring hinge according to an embodiment of the present invention is applied, and FIG. 2 is an overall perspective view showing an eyeglass frame leaf spring hinge according to the embodiment. 3 is a perspective view showing a state in which the leaf spring hinge is disassembled, and FIGS. 4 to 7 are plan views in which the leaf spring portion is horizontally broken to explain the structure of the leaf spring hinge and its operation.

In FIG. 1, what is indicated by a reference sign F is a spectacle front frame in which a pair of rims R and R are symmetrically connected by a bridge B and a bracing bar W. End pieces E and E are brazed and joined together. In addition, what is designated by the symbol N in the drawing is a nose pad that is brazed and joined to the opposing inner portions of the pair of rims R and R, and what is designated by the symbol T is the ear hanging temple.

The present invention relates to a spring hinge that hinge-connects a temple T to the end of the end piece E so that the temple T can be elastically opened and closed. The leaf spring hinge of the present embodiment has the temple T with the front frame F. On the other hand, the temple T can be elastically held in the folded state or in the normally opened state, and the temple T can be elastically expanded further outward (outward expansion) from the normally opened state. It is composed of. A detailed description will be given below with reference to the accompanying drawings.

In FIG. 2 and FIG. 3, what is indicated by reference numeral 1 is a hinge piece component having a hinge hole 13 provided at the carry-out side end of the end piece E. A first cam surface 11 and a second cam surface 12 which are substantially orthogonal to each other are formed at the tip of the. In the figure, what is indicated by reference numeral 2 is a two-piece piece part provided with two parallel bar-shaped piece pieces 21, 21 provided at the base end portion of the temple T. A notch 22 having a contact surface 23 formed in the back is provided between 21 and a hinge hole 24, 24 is formed at each tip of each of the piece pieces 21, 21.

The two piece pieces 2 are fitted with the piece pieces 21 and 21 of the piece piece 21 such that the piece piece 1 is sandwiched from above and below, and the hinge holes 24 and 24 of the piece pieces 21 and 21 and the hinge of the piece piece 1 are joined. By inserting the hinge shaft pin 5 into the hole 13, the two-piece piece component 2 and the piece component 1 are hinge-connected. This enables the folding operation of the hinge shaft pin 5 portion of the temple T (see the alternate long and short dash line in FIG. 1).

In the leaf spring hinge of the present embodiment, the temple T is provided at the hinge connection mechanism portion by disposing the leaf springs 3 whose both ends 31 and 32 swing in opposite directions like a saw. It realizes elastic opening and closing.

As shown in FIG. 3, an opening 30 is formed in a substantially middle portion of the leaf spring 3 formed by being slightly curved, while the piece pieces 21, 21 of the two-piece piece component 2 are substantially formed. Shaft support holes 20 and 20 are opened in the middle part. The shaft pin 4 is inserted into the opening 30 and the shaft support holes 20 and 20, so that the both ends 31 and 32 can swing in the seesaw state at the notches 22. It is pivotally supported between the pieces 21.

In this state of supporting the leaf spring, the temple-side end 31 of the leaf spring 3 is supported by the contact surface 23 at the back of the notch 22, and the other end-piece-side end 32 is provided. The bending elastic force of the leaf spring 3 itself contacts the first cam surface 11 (or the second cam surface 12) of the piece component 1 in a biased state. By utilizing the biasing contact relationship between the end piece side end portion 32 and the cam surfaces 11 and 12, elastic opening and closing of the temple T is realized. Hereinafter, the operation of this embodiment will be described with reference to FIGS.

As described above, the end piece side end portion 32 of the leaf spring 3 is always urged in the direction of the piece component 1 by the spring elastic force thereof, so that the temple T can be rotated by the hinge shaft pin 5 portion. For example, the end piece side end portion 32 is slidably moved on the tip peripheral surface (cam surfaces 11 and 12) of the piece component 1 while being always biased.

Therefore, as shown in FIG. 4, if the end piece side end portion 32 comes into contact with the first cam surface 11 having a smaller distance from the hinge shaft pin 5 than the other portions, the end piece side end portion is there. 32 becomes elastically stable, and the temple T is held in a state in which the temple T is normally opened with respect to the front frame F. Similarly, the end piece side end portion 32 is similarly attached to the second cam surface 12. If it comes into contact with, the end piece side end portion 32 will be stabilized there, and the temple T will be held in a folded state with respect to the front frame F.

That is, as shown in FIG. 5, the temple T is in the middle of opening and closing, and the end piece side end portion 32 contacts the corner portion between the first cam surface 11 and the second cam surface 12 of the piece component 1. In this state, since the distance between the corner and the hinge shaft pin 5 is larger than the distance on the cam surfaces 11 and 12, the leaf spring 3 is further bent and deformed at the corner. Due to the elastic force of the spring, the end piece side end portion 32 tries to return to the stable state of either the first cam surface 11 or the second cam surface 12. By this action, the temple T does not stop in the middle of opening and closing, and a light temple opening and closing operation becomes possible.

Further, as shown in FIG. 6, when the temple T is further expanded outward from the normally opened state (outward expansion), the end piece side end portion 32 has the first cam surface. 11 The upper part moves toward the end piece E while maintaining the urging contact. Even in this case, since the leaf spring 3 is bent and deformed, the temple T will elastically return to the normally open state except for the external force for expanding the outer side. Expanding is possible.

As described above, in the present embodiment, by utilizing the bending elastic force of the leaf spring 3, the elastic holding function of the temple T at the required opening / closing position and the outside expanding function are realized. However, the greatest feature of the present invention is that the leaf spring 3 is pivotally supported like a seesaw. As a result, the spring elasticity of the leaf spring 3 is effectively used, and at the same time, its durability is improved.

That is, in the present embodiment, since the leaf spring 3 is pivotally supported, as shown in FIGS. 5 and 6, when the leaf spring 3 is bent and deformed by the unevenness of the piece component 1, the supporting point is Not only the elastic bending force is exerted between the barrel pin 4 and the end piece side end portion 32, but also the elastic biasing force is exerted between the shaft pin 4 and the temple side end portion 31. Therefore, the elastic urging force necessary to realize the temple elastic opening and closing is effectively obtained.

If the leaf spring is fixed to the two-piece piece component, only the elastic force between the fixing portion and the tip of the leaf spring can be used. Therefore, in order to obtain the necessary elastic force, a strong plate is required. Spring must be used, and as a result, fatigue durability of the fixed portion of the leaf spring becomes a problem.

Further, in the present embodiment, since the leaf spring 3 is rotatably supported by the shaft pin 4 easily, the leaf spring 3 can be easily replaced. Therefore, it is also possible to prepare a plurality of types of leaf springs in advance, and to select and replace an appropriate leaf spring 3 as appropriate according to the preference of the eyeglass user or the situation of use.

The embodiment which is a specific example of the present invention is generally configured as described above, but the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the “claim for utility model registration”. Can be changed.

For example, in the above embodiment, in order to foldably connect the end piece E and the temple T, the piece part 1 and the piece pieces 21 of the two piece piece 2 are hinged by the hinge shaft pin 5. Although they are connected, of course, the present invention is not limited to this. A female screw is engraved in one of the hinge holes 13 of the piece pieces 21 and 21, and the piece piece 1 and the two piece piece 2 are provided with a hinge screw. You may make it connect using hinges. The same applies to the pivotal support of the leaf spring body 3 between the piece pieces 21 of the two-piece piece component 2, and a screw pin may be used instead of the shaft pin 4.

Further, as shown in FIG. 7, a contact step 11a is formed at a required position of the first cam surface 11 with which the end piece 32 of the leaf spring 3 on the end piece side abuts in a biased state. Is also good. With this structure, when the temple T is expanded outward, the end piece side end portion 32 which slides and moves on the first cam surface 11 toward the end piece E is abutted against the hit step 11a. Of. In this way, it is possible to reliably restrict the outward expansion of the temple T within a predetermined angle without complicating the structure.

[0028]

[Effect of device]

 As described above with reference to the embodiments, in the leaf spring hinge used in the eyeglass frame according to the present invention, the leaf spring that allows the temple to have the elastic holding function at the required opening / closing position and the outer expanding function is provided. Since both ends are pivotally supported so that they can swing in opposite directions, the spring elastic force of the leaf spring can be effectively exerted, and an unreasonable burden is applied to the support portion of the leaf spring. Instead, it is possible to provide a leaf spring hinge having a simple structure and excellent functionality and durability.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an eyeglass frame to which an eyeglass frame leaf spring hinge according to an embodiment of the present invention is applied.

FIG. 2 is an overall perspective view showing a leaf spring hinge of the present embodiment.

FIG. 3 is a perspective view showing a state where the leaf spring hinge of the present embodiment is disassembled.

FIG. 4 is a plan view in which a leaf spring portion of the leaf spring hinge of the present embodiment is horizontally broken.

FIG. 5 is a plan view in which a leaf spring portion is horizontally broken, showing a state in which the temple of the leaf spring hinge of the present embodiment is opened and closed midway.

FIG. 6 is a plan view in which a leaf spring portion is horizontally broken, showing a state in which the temple of the leaf spring hinge of the present embodiment is opened outward.

FIG. 7 is a plan view in which a leaf spring portion is horizontally broken, showing a modified example of the leaf spring hinge of the present embodiment.

[Explanation of symbols]

 E End piece F Front frame T Temple 1 Piece component 11 First cam surface 11a Step per contact 12 Second cam surface 2 Two piece piece component 20 Shaft support hole 21 Piece piece 22 Notch 23 Contact surface 3 Leaf spring 30 Open hole 31 Temple Side end 32 End piece side end 4 Shaft pin 5 Hinge shaft pin

Claims (4)

[Scope of utility model registration request] 1. A spring hinge that foldably hinges an ear hook temple T to end portions of the end pieces E provided on the left and right ends of the spectacle front frame F on the take-out side. A piece component 1 which is provided at the exit end and has a first cam surface 11 and a second cam surface 12 formed at the tip.
And; provided at the base end of the temple T,
A two piece piece 2 having two piece pieces 21 and 21 to be hinge-connected by sandwiching the piece from above and below, and a notch 22 formed between these piece pieces 21 and 21; a piece piece of the two piece piece 2 It is a spring body that is rotatably supported between 21 and 21, and both ends 31 and 32 of the notch 22 are swingable, and the temple-side end 31 of the notch 22 is at the back of the notch 22. Supported by the formed contact surface 23,
The end 32 on the end piece side is the first cam surface 11 of the piece part 1.
Or a leaf spring 3 that comes into contact with the second cam surface 12 in a biased state; and the bending elastic biasing force of the leaf spring 3 acts on the first cam surface 11 or the second cam surface 12 of the piece component 1. A leaf spring hinge used for an eyeglass frame, characterized in that the temple T is elastically held at a required temple opening / closing position with respect to the front frame F by forcing. 2. A plate is formed when a contact step 11a is formed at a required position on the first cam surface 11 of the piece part 1 and the temple T is expanded further outward from the normally opened state with respect to the front frame F. The spectacle frame according to claim 1, characterized in that the end portion 32 of the spring 3 on the end piece side is abutted against the hit step 11a so as to restrict the outward expansion of the temple T within a predetermined angle. Leaf spring hinge used for. 3. A shaft support hole 20, 20 is formed in each of the piece pieces 21, 21 of the two piece piece 2, and an opening 30 is formed in an approximately middle portion of the leaf spring body 3. By inserting the shaft pin 4 into the shaft supporting holes 20 and 20 and the opening 30, the two-piece component 2
The leaf spring hinge used in the spectacle frame according to claim 1 or 2, wherein the leaf spring body 3 is rotatably supported between the pair of pieces 21. 4. The piece component 1 and the piece pieces 21, 21 of the two-piece piece component 2 are hingedly connected by a hinge shaft pin 5, according to any one of claims 1 to 3. Leaf spring hinge used for the described spectacle frame.