JP3002824U - Glasses - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide eyeglasses that use at least one screw and that are free from looseness and looseness, and that are easy to manufacture and inexpensive. [Structure] The screw connecting the members forming the eyeglasses has a screw groove in addition to the screw thread, and the groove bottom of the screw groove is shallower than the root of the screw thread, and its inclination is large and slightly twisted. However, its cross section is formed as an arc surface or an inclined surface on one side which is a boundary area with the screw thread.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to eyeglasses having a screw fastening portion in at least one place.

[0002]

[Prior art]

 The metal spectacle frame has an armature fixed to both sides of the front frame, and a temple is foldably connected to the armature via a hinge. A nose pad is attached to the center of the front frame. By the way, in the front frame, two rims are formed symmetrically and are connected by a connecting plate. Then, the rims are brazed with rim locks to fit the lenses, and bis are used for both rim locks. It has a structure that can be screwed to open and close.

Further, although the temple can be folded through the hinge as described above, a shaft screw is also used for the hinge. If the rim lock shaft screw is tightened once, it rarely loosens later, but the hinge shaft screw loosens little by little each time the temple is opened and closed. Therefore, the temples are loose, and the worn glasses may be misaligned and sometimes come off, so the screws must be tightened from time to time.

In addition to these, there is an attachment portion for the nose pad, where the screws are used for the spectacle frame. The screw is a shaft for supporting the stopper of the nose pad, but the screw loosens and sometimes comes off due to repeated rocking of the nose pad. Further, in recent years, as shown in FIG. 3, spectacles without a rim have been used. However, in this type of spectacles, the fastening pieces 2 are formed on both sides of the connecting member 1 and the fastening piece 2 is formed. The lens 3 is connected and fixed to the piece 2.

Similarly, a fastening piece 2 is also formed on the armature 4 and fixed to the lens 3, and a temple 6 is foldably connected to the armature 4 via a hinge 5 as in the conventional case. By the way, as a fastening means for the fastening piece 2 and the lens 3, the fastening piece 2 and the nut are fastened by using screws 7 so that the fastening piece 2 and the nut are not in direct contact with the lens 3. However, the looseness of these screws must be avoided because it causes the entire glasses to loosen.

By the way, in order to prevent the screws used in the spectacle frame from loosening, some screws having a locking function are used. As shown in FIG. 4a, the loosening prevention screw is formed by forming a cutout groove in a part of the outer peripheral portion and filling the groove with resin 8, or as shown in FIG. 4b, a thin resin layer around the entire circumference of the screw. There are those with 9. When these screws are screwed into the female screw, they are deformed by compression and closely adhere to the female screw, and the frictional resistance prevents loosening of the screws. However, even if the resin is compressed and deformed to increase the frictional resistance with the female screw, there is a limit, and it is impossible to completely prevent the loosening prevention. Besides, the work of applying the resin is troublesome, and the cost of the screw increases.

[0007]

[Problems to be solved by the present invention]

 As described above, the conventional locking screws have the above problems. The problems to be solved by the present invention are these problems, and there is an equal possibility that the tightened screw is loosened, and the glasses using the screw are manufactured at low cost.

[0008]

[Means for Solving the Problems]

 The glasses of the present invention are glasses that use at least one screw regardless of the material and model. The screw forms a screw thread, but has a screw groove in addition to the screw thread. The bottom of the screw groove is shallower than the root of the screw thread, and its inclination is very large and only slightly twisted, and the cross-sectional shape of the screw groove is limited to V type, U type, etc. Although it does not, a smooth arc surface or inclined surface is formed on one side, which is the boundary area with the outer circumference of the screw thread, that is, on the left side of the screw groove in the case of a right screw.

One screw hole has a slightly smaller inner diameter of the screw bottom. Therefore, when the above-mentioned screw is screwed into the screw hole, the screw thread tip of the screw is plastically deformed and meshed while scraping off the screw bottom of the screw hole. With the conventional screw, the screw thread meshes with the screw bottom of the screw hole, but there is partial contact without contact on the entire peripheral surface, or with the screw with the resin layer formed on the outer surface it makes contact on the entire peripheral surface. However, since the contact pressure is small, the screw loosens, but in the screw of the present invention, the screw thread and the screw bottom are almost in contact with the entire circumferential surface, and the contact pressure is very high. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

[0010]

【Example】

 FIG. 1 is an embodiment showing a screw used in the glasses according to the present invention. The basic form of the screw is almost the same as the conventional one. In the figure, 11 indicates a head and 12 indicates a screw part, and a groove into which the tip of the driver is inserted when screwed into the upper end of the head 11. 13 are formed. .. are formed at a constant pitch on the threaded portion 12, and valleys 15, 15 ... Are provided between the screw threads 14, 14. Further, a plurality of screw grooves 16, 16 ... Are formed in the screw portion 12 in a slightly spiral shape so as to cut out the screw threads 14, 14 ,.

FIG. 2 is an enlarged cross-sectional view of the screw portion 12. The screw grooves 16, 14 ... Are provided with the above-mentioned screw grooves 16, 16 ... at equal intervals, and the groove bottom of the screw groove 16 is a screw thread. It is shallower than the bottom of 14 and its cross section is roughly V-shaped, but one side forms an arc surface. In the case of a right-hand screw as shown in the figure, this arcuate surface is on the side where the screw threads 14 sandwiching both screw grooves 16, 16 are engaged.

By the way, one of the screw holes is dimensioned to be plastically deformed by the screw threads 14, 14 ... Forming the screw grooves 16, 16 ... When the screw is screwed. That is, the screw hole is slightly small, and is screwed while deforming the screw thread and the valley of the screw hole, and the corner 18 of the screw thread is caught in the bottom of the screw hole to prevent reverse rotation. . Therefore, this screw is made of a material harder than the spectacle frame.

The screw is used for connecting the respective members constituting the spectacle frame, and is used as, for example, a hinge shaft for connecting the temples in a foldable manner. Further, it can be used as a screw for tightening a rim for holding the lens, and further as a screw 7 for directly connecting the lens 3 as shown in FIG. As described above, the glasses of the present invention have the screw groove formed on the outer periphery of the screw portion as the screw for forming the frame, and the following effects can be obtained.

[0014]

[Effect of device]

 The glasses of the present invention have a screw groove formed on the outer periphery of the screw portion as a screw for connecting the constituent members. Since the material hardness of the screw is high, the screw hole is made plastic by screwing it into the screw hole. It deforms and comes into contact with the inner surface of the screw hole at high pressure, and the plastically deformed material flows into the screw groove and bites into the corner of the screw thread. Therefore, the screw screwed at one end does not reversely loosen, and if the screw is used as a hinge shaft for connecting temples, rattling of the temple does not occur. Further, even if the spectacle frame has a structure in which the lens is directly screwed with the connecting member, the spectacles will be stable. Then, the screw can be rolled in the same way as the screw thread is formed, and the manufacturing cost is reduced.

[Brief description of drawings]

FIG. 1 is a screw used in glasses according to the present invention.

FIG. 2 is an enlarged view of a screw section of a screw.

FIG. 3 is a pair of spectacles in which a lens is directly screwed by a connecting member.

FIG. 4 is a cross-sectional view of a conventionally used locking screw.

[Explanation of symbols]

 11 Head 12 Threaded portion 13 Groove 14 Thread 15 Valley 16 Screw groove 17 Arc surface 18 Square

Claims (2)

[Scope of utility model registration request] 1. In an eyeglass constituted by using at least one screw to connect or fix each component, the screw has a plurality of screw grooves formed on the outer periphery of the screw portion, and the screw groove has a plurality of screw grooves. The cross section is roughly V-shaped, and one side is an arc surface or an inclined surface. When the screw is screwed into the screw hole, the screw thread and the valley bottom of the screw hole are plastically deformed to bite into the screw groove to reverse the rotation. Glasses characterized by being prevented. 2. In the spectacles formed by screwing the left and right lenses with a connecting member and screwing the royloy that connects the temples to the outer circumference of the lens, the screw that bisfastens the connecting member and the royal rod to the outer circumference of the screw part. A plurality of screw grooves are formed, the cross section of the screw grooves is roughly V-shaped, and one side is an arc surface or an inclined surface. When screwing the screw into the screw hole, the screw thread and the valley bottom of the screw hole are formed. Eyeglasses characterized by being plastically deformed to bite into the screw groove to prevent reverse rotation.