JP3010281U - Screw rotation prevention lens connection mechanism for rimless glasses - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the screws used for connecting lenses of rimless glasses from rotating together. [Structure] A modified boss is provided on the back surface of the head of the screw, a corresponding sunk hole is formed in the component, and the modified boss is fitted into the sunk hole. [Effect] By fitting the deformed boss and the sink hole, co-rotation of the screw can be prevented. This facilitates lens attachment and eyeglass assembly.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a lens connection mechanism for rimless glasses, and more particularly to a screw rotation prevention lens connection mechanism that prevents unnecessary rotation of a lens set screw and simplifies lens fastening work. .

[0002]

[Prior art]

 Rimless eyeglasses are popular because they have a clean design because they do not have a rim around the lenses and have a wide field of view. However, since the rims were removed and the eyeglasses were made, some problems may occur. For example, in general rimless spectacles, a screw hole is made at the end of the lens, and another spectacle component having a similar screw hole is connected with a screw and a nut. However, corrective eyeglasses, which make up most of rimless eyeglasses, need to be replaced with optimal corrective lenses at eyeglass retailers. And when exchanging such a lens, the small screw and nut rotate together, which makes it difficult to loosen or tighten the screw. In particular, ordinary eyeglass retailers do not prepare special machinery and equipment, and the number of shop assistants is limited, so disassembling and assembling while preventing co-rotation of nuts and screws. There is a limit to the work capacity to carry out, and after assembly, the screws may not be properly tightened, causing the lens to become loose immediately, or the lens surface may be scratched with a tool. Absent.

[0003]

[Problems to be solved by the device]

 The present invention has been made in view of the above problems of conventional rimless spectacles, and prevents the rimless spectacles from rotating together with the nut and the screw, and can be easily disassembled and assembled by one person without a special tool. The realization is a technical issue.

[0004]

[Means for Solving the Problems]

 The means adopted in the present invention for solving the above problems will be described below.A modified shape boss 31b having a predetermined shape is formed on at least the back surface of the head of the set screw 31, and a through hole 11a is formed in a holding component to which a lens is attached. Open and form a predetermined boss sink hole 11b around the surface of the through hole 11a into which the irregular boss is inserted, then insert the irregular boss 31b into the boss sink hole 11b, and set the screw 31 into the through hole of the holding component. The lens connecting mechanism, in which the lens 11a is inserted through the stopper hole 21 of the lens 2 and fastened with the nut 32, is applied to rimless glasses. The shape of the deformed boss 31b is such that the distance from the central axis of the screw to the side surface of the pillar changes depending on the distance measurement angle.Examples of such shapes are polygonal pillars, eccentric cylinders, and elliptic cylinders. The shape can be selected, or a polygonal frustum can be applied. When such a deformed boss 31b is used, when the screw 31 is inserted into the through hole 11a of the holding component, the rotation of the screw 31 is locked by the fitting of the deformed boss 31b and the boss sink hole 11b, and the nut 32 is locked. The screws will not rotate together even if rotational torque is applied.

Further, in particular, a washer 33 made of synthetic resin is sandwiched between the lens 2 and the nut 32, or a buffer tube 34 made of synthetic resin is interposed between the fixing hole 21 and the screw 31 of the lens 2. The screw 31 and the nut 32 can prevent the lens 2 from being damaged. With this configuration, the lens 2 is less likely to be damaged even if the nut fastening torque is too strong or too weak, so that the allowable range of the nut fastening torque is widened, and the lens coupling assembly work is simplified.

If the deformed boss 31b has a square pillar shape and the boss sink hole 11b has a square tubular shape, the boss or sink hole having the shape is easily manufactured, and therefore, the parts can be processed easily. It becomes simple.

[0007]

【Example】

 Hereinafter, the present invention will be described based on embodiments.

A metal plate is cut into a predetermined shape having three corners, press-worked to give a predetermined curvature, and claw portions 12, 12 that extend in mutually opposite directions and can abut against the peripheral edge of the lens 2. An intermediate processed product having three projecting plates, that is, a fixing portion 11 that can contact the lens surface with a contact surface that is bent approximately 90 ° with respect to the contact surface of the claw portions 12 and 12, is formed. In the fastening part 11 of this intermediate processed product, a boss sink hole 11b having a predetermined depth is formed by coining in a square shape, and at the same time, a through hole 11a is opened near the center of the boss sink hole 11b. Then, the lens stopping member 1 which is a holding component for mounting the lens is completed (see FIG. 3). The contact between the claws 12 of the lens stop member 1 and the peripheral edge of the lens is achieved when the lens 2 is screwed, which will be described later. Stabilization is measured. As shown in FIG. 1, the lens stopper member 1 is welded with a metal member 4 hinged to a temple member 5 made of metal. The hinge connection between the temple member 5 and the wisdom member 4 is performed by the hinge 6.

A lens 2 whose peripheral edge is cut into a predetermined lens shape is prepared, and a stop hole 21 is opened at a predetermined position near the end of the lens 2 side. The diameter of the stop hole 21 formed in the lens is set to be slightly larger than the outer diameter of the male portion 31a of the set screw 31. As shown in Fig. 2, the set screw 31 has a head having a shape in which a flat disk having a plus driver groove on the upper surface and a square columnar block having an outer shape that is concealed by the disk are integrally formed. The square column block part of the portion can function as the irregular boss 31b. Then, a soft synthetic resin buffer tube 34 having a predetermined diameter is inserted into the stopper hole 21 of the lens 2, and the deformed boss 31b and the boss sink hole 11b are fitted to each other, and the through hole 11b of the lens stopper member 1 Insert the male screw part 31a of the screw 31 in the order of the buffer tube 34 in the screw hole 21 of the screw 2 and the predetermined washer 33 made of synthetic resin, and then tighten the matching nut 32 from the tip of the screw. The fastening of the lens 2 to the lens fastening member 1 is completed. At this time, even if a rotation torque is applied to the nut 32 for tightening, the screw 31 does not rotate together. This is because the deformed boss 31b of the screw 31 is fitted into the boss sink hole 11b of the lens stopper member 1. The buffer tube 34 has an outer diameter adapted to the diameter of the screw hole formed in the lens 2, an inner diameter slightly smaller than the outer diameter of the male thread portion of the screw 31, and has an annular flange at one end. To use. In this way, the buffer tube 34 will be deformed to some extent from the time when the screw 31 is inserted, so that even if a soft synthetic resin is used for the tube 34, the lens 2 can be stably fixed without swaying too much. In addition, the flange of the tube 34 can prevent unnecessary displacement of the buffer tube 34 when the screw 31 is inserted.

In the above-described embodiment, the lens of the spectacles is connected to the intelligence member and the temple member via the lens stop member. For example, the bridge side is also connected via the similar lens stop member. it can. The spectacles with which the lenses can be connected in this way have no co-rotation of the lens set screws and nuts, so one person can easily disassemble and assemble without special tools. It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the utility model registration claim. For example, the shape of the deformed boss can be changed to a triangular column shape, a hexagonal column shape, an elliptic cylinder shape, or a keyed shape. It is also possible to make changes such as increasing the number of setscrews or using a screw head without a groove for screwdriver fitting. In addition, by forming a second-step sunk hole above the boss sunk hole, the entire head of the set screw can be sunk into the sunk hole, or the entire screw head can be a modified boss to simplify boss processing. It is also possible to change it, for example.

[0011]

[Effect of device]

 As described above, the lens coupling mechanism of the present invention prevents the co-rotation of the set screw and the nut by fitting the deformed boss provided on the set screw and the boss sink hole provided on the holding component. This is a simple task for lens replacement of rimless glasses. In other words, in order for the set screw to rotate, the deformed boss must also rotate, which inevitably requires a change in which the boss diameter increases in a given direction. Is stopped in the direction with the smaller diameter of. This restraint can prevent the set screw from rotating together. As described above, the present invention prevents co-rotation of the set screw and the nut and simplifies lens separation and fixation in rimless spectacles, and has high industrial utility value.

[Brief description of drawings]

FIG. 1 is a partially enlarged exploded view of the present embodiment.

FIG. 2 is an enlarged perspective view of a lens set screw in the present embodiment.

FIG. 3 is an enlarged perspective view of a lens stopping member in the present embodiment.

[Explanation of symbols]

 1 Lens stop member 11 Fastening part 11a Through hole 11b Boss sink hole 12 Claw part 2 Lens 21 Stop hole 31 Set screw 31a Male screw part 31b Deformed boss 32 Nut 33 Washer 34 Buffer tube 4 Intelligent member 5 Temple member

Claims (4)

[Scope of utility model registration request] 1. A lens connecting mechanism for rimless eyeglasses configured by fixing a lens 2 having a stop hole 21 to a holding component with a set screw 31, wherein at least a back surface of a head of the set screw 31. Deformed boss 31b where the distance from the screw center axis to the side surface changes depending on the angle
A boss sink hole 11b is formed around the surface of the through hole 11a formed in the holding component, into which the deformed boss 31b can be fitted, and the boss sink hole 11b has the largest diameter distance from the center of the through hole 11a. Is formed smaller than the maximum distance from the screw center axis of the deformed boss 31b to the side surface, while the deformed boss 3 of the set screw 31 is inserted into the boss sink hole 11b of the holding component.
A screw rotation preventing lens coupling mechanism for rimless spectacles, characterized in that 1b is inserted, a set screw 31 is inserted from a through hole 11a of a holding component into a stop hole 21 of a lens 2, and a nut 32 is fastened. 2. A lens connecting mechanism for rimless eyeglasses configured by fixing a lens 2 having a stop hole 21 to a holding component with a set screw 31, wherein at least a back surface of a head of the set screw 31. Deformed boss 31b where the distance from the screw center axis to the side surface changes depending on the angle
Is provided, and around the surface of the through hole 11a opened in the holding component, a boss sink hole 11b into which the deformed boss 31b can be fitted is bored, and the boss sink hole 11b has the largest diameter from the through hole 11a center. The distance is formed to be smaller than the maximum distance from the screw center axis of the deformed boss 31b to the side surface, while the deformed boss 3 of the set screw 31 is inserted into the boss sink hole 11b of the holding component.
Rimless eyeglasses characterized by inserting 1b, inserting a set screw 31 from the through hole 11a of the holding component into the stop hole 21 of the lens 2, and fastening with a nut 32 with a washer 33 made of synthetic resin interposed. Screw rotation prevention lens connection mechanism in. 3. A lens connecting mechanism for rimless eyeglasses configured by fixing a lens 2 having a stop hole 21 to a holding component with a set screw 31, wherein at least a back surface of the head of the set screw 31 is provided. Deformed boss 31b where the distance from the screw center axis to the side surface changes depending on the angle
A boss sink hole 11b is formed around the surface of the through hole 11a formed in the holding component, into which the deformed boss 31b can be fitted, and the boss sink hole 11b has the largest diameter distance from the center of the through hole 11a. Is formed to be smaller than the maximum distance from the screw center axis of the deformed boss 31b to the side surface, while the buffer tube 34 made of synthetic resin is inserted into the screw hole of the lens, and the set screw is inserted into the boss sink hole 11b of the holding component. 31 variant boss 3
1b is inserted, the set screw 31 is inserted from the through hole 11a of the holding component into the buffer tube 34 in the stop hole 21 of the lens 2, and the nut 32 is tightened through the washer 33 made of synthetic resin. A screw rotation prevention lens coupling mechanism for featured rimless glasses. 4. A lens connecting mechanism for rimless spectacles configured by fixing a lens 2 having a stop hole 21 to a holding component with a set screw 31, the set screw 31 having a disk-shaped head rear surface. A rectangular column shaped irregular boss 31b having a diagonal length of the bottom surface smaller than the diameter of the head disk is provided, and a boss having a size corresponding to the irregular shaped boss 31b is provided around the surface of the through hole 11a formed in the holding component. A recess hole 11b is formed, a synthetic resin buffer tube 34 is inserted into the screw hole of the lens, and the deformed boss 3 of the set screw 31 is inserted into the boss recess hole 11b of the holding component.
1b is inserted, the set screw 31 is inserted from the through hole 11a of the holding component into the buffer tube 34 in the stop hole 21 of the lens 2, and the nut 32 is tightened through the washer 33 made of synthetic resin. A screw rotation prevention lens coupling mechanism for featured rimless glasses.