JP2010085896A - Lens fixing mechanism of spectacle frame - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens fixing mechanism of a spectacle frame, which can surely fix lenses by simple operation and reduce a manufacturing cost without requiring high processing accuracy. <P>SOLUTION: A front rim 1 is a plate-like member composed of a synthetic resin material having elasticity and forms a pair of right and left apertures 10. An engaging claw 11 to be fitted along the outer peripheral edge shape of each lens 2 is projected on the inner peripheral edge of each aperture 10, while a pair of notches 12a are formed on other portions of the inner peripheral edge. A lock claw 12 is formed between the notches 12a, and a slit groove 21 is formed along the outer peripheral edge of the lens 2. The engaging claw 11 is inserted from the side direction and engaged with the slit groove 21, and the tip portion of the lock claw 12 is curved and engaged with a part of the slit groove 21 of the lens 2 to insert and fix the lens 2 in the aperture 10. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is an improvement of a spectacle frame, more specifically, a spectacle frame that can securely fix a lens by a simple operation and can reduce manufacturing cost without requiring high processing accuracy. The present invention relates to a lens fixing mechanism.

  As is well known, there are various types of spectacle frames, and various types of spectacle frames are provided to meet the various demands of the general public. Type, half rim type, rimless type, etc. are known.

  Conventionally, when a lens is fixed using a rim, a concave groove (slit) is formed on the outer peripheral edge of the lens over the entire circumference, and a band such as a protrusion or a teg formed on the inner peripheral edge of the rim in the concave groove. The lens is fixed and held by fitting.

  And as what fixes a lens to a full rim type frame, what fits the edge part of the opening part of the rim formed in plate shape to the concave groove of a lens periphery is disclosed (for example, patent documents) 1).

  However, such a spectacle frame is opened by forming a cut portion in a part of the plate-like rim, and a so-called “rim lock” is configured, so that the lens may fall off not only due to an impact but also due to a failure of the rim lock portion. There was a problem that there was.

In addition, a lens and a plate-shaped rim opening that are fitted in the same shape are also disclosed (see, for example, Patent Document 2). In order to match the shape in this way, high processing accuracy is required. Therefore, there is a risk that the manufacturing cost increases or the lens and the rim are damaged due to unnecessary pressure being applied to the portion without matching the lens.
Japanese Patent Laid-Open No. 2001-281605 (page 2-3, FIG. 1-2) Japanese Patent Laying-Open No. 2003-15095 (second page, FIG. 9-10)

  The present invention has been made in view of the above-described problems with conventional spectacle frames, and the object of the present invention is to securely fix the lens with a simple operation, Another object of the present invention is to provide a lens fastening mechanism for a spectacle frame that can reduce the manufacturing cost without requiring high processing accuracy.

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

  That is, according to the present invention, the front rim 1 is a plate-like member made of a synthetic resin material having elasticity, in the front portion of the spectacle frame capable of holding the pair of left and right lenses 2 and 2 on the front rim 1. A pair of openings 10 and 10 are formed, respectively, and an engaging claw 11 is formed on the inner peripheral edge of the opening 10 along the outer peripheral edge shape of the lens 2. A pair of notches 12a and 12a are provided in the other part, a lock claw 12 is formed between them, and a slit groove 21 is formed along the outer peripheral edge of the lens 2, and the engagement with the slit groove 21 The claw 11 is inserted and engaged from the side, and the tip of the lock claw 12 is bent and engaged with a part of the slit groove 21 of the lens 2 so that the lens 2 is opened. So that it can be fixed inside To complete the lens fastening mechanism of the eyeglass frame by employing the technical means of that.

  In addition, in order to solve the above-described problems, the present invention employs technical means for forming the notches 12a and 12a and the lock claws 12 of the front rim 1 on the front outer side in addition to the above-described means as necessary.

  Furthermore, in order to solve the above-described problems, the present invention provides a fastening portion 13 at the center of the front rim 1 in addition to the above means as necessary, and the front rim 1 is used as a bridge of the spectacle body. Adopted technical means to make it fixable.

  Furthermore, in order to solve the above-described problems, the present invention employs technical means in which the synthetic resin material of the front rim 1 is made of a polyamide-based superelastic resin in addition to the above means as necessary.

  In the present invention, a pair of left and right openings are formed in the front part of the spectacle frame capable of holding a pair of left and right lenses on the front rim, with the front rim being a plate-like member made of a synthetic resin material having elasticity. And, on the inner peripheral edge of the opening, a hooking claw that matches the outer peripheral edge shape of the lens is formed, while a pair of notches are provided on the other inner peripheral edge. A lock claw is formed in between and a slit groove is formed along the outer peripheral edge of the lens so that the engagement claw is fitted into the slit groove from the side and is engaged, and the tip of the lock claw By bending the portion and engaging with a part of the slit groove of the lens, the lens can be housed and fixed in the opening.

  Therefore, by using the fastening mechanism of the present invention, the lens can be securely fastened with a simple operation, and the manufacturing cost can be reduced without requiring high processing accuracy. The practical use value as a spectacle frame is extremely high.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention will be described in more detail with reference to the drawings specifically shown as follows.

  An embodiment of the present invention will be described with reference to FIGS. In FIG. 1, what is indicated by reference numeral 1 is a front rim, and this front rim 1 is a plate-like member made of a synthetic resin material having elasticity.

  Also, what is indicated by reference numeral 2 is a lens, and a slit groove 21 is formed along the outer peripheral edge.

  Therefore, the fastening mechanism in the present invention is employed in the front portion of the spectacle frame that can hold the pair of left and right lenses 2 and 2 on the front rim 1, and the configuration will be described below.

  First, the front rim 1 is a plate-shaped member made of a synthetic resin material having elasticity, and a pair of left and right openings 10 and 10 are formed (see FIG. 2).

  In the present embodiment, the synthetic resin material of the front rim 1 can be a polyamide-based superelastic resin (for example, “Grillamide TR90” manufactured by EMS) and has excellent elasticity and reproducibility. Even if it is bent repeatedly, it will not be damaged.

  A hooking claw 11 that matches the outer peripheral edge shape of the lens 2 protrudes from the inner peripheral edge of the opening 10. In the present embodiment, the engaging claws 11 may be provided on the upper edge, the lower edge, and the inner side of the opening 10 and may be formed continuously or intermittently.

  Next, a pair of notches 12a and 12a are provided on the other part of the inner peripheral edge, and a lock claw 12 is formed between them. The notch 12a is provided so as to slightly bite from the inner peripheral edge, and the tip of the lock claw 12 is provided so as to protrude slightly from the inner peripheral edge, thereby ensuring a predetermined height. The bending deformation of is allowed.

  On the other hand, a slit groove 21 is formed along the outer peripheral edge of the lens 2. In this embodiment, it is formed over the entire lens periphery.

  Then, as shown in FIG. 3, the engaging claw 11 is inserted into the slit groove 21 from the side and partly hooked, and then the tip of the locking claw 12 is bent and the lens 2 is bent. By engaging with the remaining part of the slit groove 21, the lens 2 can be fixed inside the opening 10 (see FIG. 4).

  In the present embodiment, the notches 12a and 12a of the front rim 1 and the lock claw 12 are formed on the front outer side where an external force is hardly applied by an impact or the like, thereby making it difficult to disengage these members.

  In the present embodiment, the fastening portion 13 is disposed at the center of the front rim 1 and a bolt is inserted into the fastening portion 13 so that the front rim 1 can be fixed to the bridge of the spectacle body. can do.

  The present invention is generally configured as described above. However, the present invention is not limited to the illustrated embodiment, and various modifications can be made within the description of “Claims”. The positions where the hooking claws 11 and the lock claws 12 are formed can be changed according to the design.

  In addition, the spectacle frame main body and the end piece can be directly fixed to the front rim 1, and the configuration and arrangement position of the fastening portion 13 can be changed. Any of these are within the technical scope of the present invention. Belongs.

It is a whole perspective view showing the spectacles of embodiment of this invention. It is a front view showing the front rim of the embodiment of the present invention. It is a fragmentary perspective view showing the fixation mechanism of embodiment of this invention. It is a partial top view showing the fixation mechanism of embodiment of this invention.

Explanation of symbols

1 Front rim
10 opening
11 Hanging claws
12 Locking claw
12a Notch
13 Fastening part 2 Lens
21 Slit groove

Claims (4)

In the front part of the spectacle frame that can hold the pair of left and right lenses 2, 2 on the front rim 1,
The front rim 1 is a plate-like member made of a synthetic resin material having elasticity, and a pair of left and right openings 10 and 10 are formed respectively. A hooking claw 11 is formed along the outer peripheral edge shape of the two, while a pair of notches 12a and 12a are provided on the other part of the inner peripheral edge, and a lock claw 12 is formed between them. And
A slit groove 21 is formed along the outer peripheral edge of the lens 2, and the engagement claw 11 is fitted into the slit groove 21 from the side and is engaged, and the tip of the lock claw 12 is bent. A lens fastening mechanism for a spectacle frame, characterized in that the lens 2 can be internally fixed in the opening 10 by engaging with a part of the slit groove 21 of the lens 2 at least.   2. The lens fastening mechanism for a spectacle frame according to claim 1, wherein the notches 12a and 12a and the lock claw 12 of the front rim 1 are formed outside the front.   3. A lens fixing part for a spectacle frame according to claim 1, wherein a fixing part (13) is arranged at the center of the front rim (1), and the front rim (1) can be fixed to a bridge of the spectacle body. mechanism.   The lens fastening mechanism for a spectacle frame according to any one of claims 1 to 3, wherein the synthetic resin material of the front rim 1 is a polyamide-based superelastic resin.

Images