Trial mirror frame capable of adjusting rotation tightness

Abstract

The utility model provides a trying frame capable of adjusting rotation tightness, which comprises a frame and legs, the inner sides of the left and right parts of the frame are provided with double-layer circular stepped mounting grooves, the stepped mounting groove at the bottom layer is internally provided with a circular rotating disc, the stepped mounting groove at the upper layer is internally provided with a cover ring, and the cover ring and the frame are welded into a whole. The bottom of the rotating disc extends out of the outer side face of the mirror frame, the outer side of the rotating disc extends out of an installation step, the installation step is connected with an insertion frame with an insertion groove, the inner side face of the cover ring is connected with a lens insertion block, the lens insertion block is provided with a lens insertion groove, a through threaded hole is formed in the lens insertion block, and a steel ball, a compression spring and a locking screw are sequentially arranged at the bottom of the threaded hole. The damping degree is adjusted by controlling the extrusion force of the steel ball on the inner side face of the rotating disc by rotating the locking screw. When the rotating disc rotates, the rotating disc can be adjusted to a proper degree of tightness, and the damping effect and real-time accurate positioning during rotation are ensured.

Description

Technical Field

[0001] This utility model relates to a trial frame, and more particularly to a trial frame with adjustable rotation tightness. Background Technology

[0002] For eye conditions such as farsightedness and nearsightedness, the most common correction method is wearing glasses. An eye exam is essential before choosing glasses, and trial lens refraction is a crucial step. Trial lenses are categorized as spherical, cylindrical, prism, progressive multifocal, and auxiliary lenses. This involves the patient trying on frames with inserted lenses, repeatedly changing the lenses to determine the appropriate prescription. Trial lens refraction is a common method due to its simple structure and low cost.

[0003] Existing full-rimmed progressive eyeglass trial frames typically consist of a metal dial, plastic gears, and a plastic frame base secured with screws. These frames have the following drawbacks: 1. The use of metal for the dial makes the entire frame quite heavy, resulting in discomfort when worn; 2. The plastic gears are usually coated with damping grease to adjust the feel of gear rotation, but the effectiveness of the grease deteriorates over time, causing the gears to loosen and making precise adjustment of the astigmatism axis difficult. Furthermore, users cannot easily add a precise amount of damping grease, requiring them to discard the entire frame and purchase a new one. Utility Model Content

[0004] To address the aforementioned issues, this invention aims to provide an adjustable rotation tension trial frame. It features a novel structure, low overall weight, and adjustable tension during rotation to ensure damping and accurate real-time positioning.

[0005] The present invention relates to an adjustable rotating trial glasses frame, comprising a frame and temples. The frame is characterized by having double-layered circular stepped mounting grooves on the inner sides of its left and right portions. A circular rotating disk is housed in the bottom stepped mounting groove, and a cover ring is housed in the upper stepped mounting groove. The cover ring and frame are welded together. The bottom of the rotating disk extends beyond the outer side of the frame, which has circumferential graduations. A mounting step extends from the outer side of the rotating disk, and a bracket with a slot is connected to the mounting step. A lens insert is connected to the inner side of the cover ring, and the lens insert has a lens slot. A through-hole threaded hole is provided within the lens insert. A steel ball, a compression spring, and a locking screw are sequentially arranged at the bottom of the threaded hole. The damping is adjusted by controlling the pressure exerted by the steel ball on the inner side of the rotating disk by rotating the locking screw.

[0006] Preferably, the lens insert is fixed to the cover ring by screws.

[0007] Preferably, the inner side of the cover ring is connected to two lens inserts, and the inner side of the two lens inserts is provided with a lens slot, and the lens is inserted into the lens slot from top to bottom and fixed.

[0008] Preferably, the outer side of the rotating disk extends into two mounting steps, and the inner side of the insert bracket is vertically provided with multiple independent slots for inserting lenses with different functions.

[0009] Preferably, the inner side of the rotating disk is provided with radial grooves at equal angles along the circumference, and the steel ball is in close contact with the inner side of the rotating disk and positioned at the radial grooves when the rotating disk rotates.

[0010] This utility model has a novel structure and low overall weight. The rotation of the rotating disc can be adjusted to a suitable tightness to ensure damping effect and real-time accurate positioning. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0013] Figure 3 This is an exploded view of the frame in this utility model;

[0014] Figure 4 for Figure 3 A structural diagram from another perspective;

[0015] Figure 5 This is the front view of the present invention;

[0016] Figure 6 for Figure 5 Partial sectional view along the AA direction;

[0017] Wherein: 1—frame; 11—stepped mounting groove; 2—temple; 3—rotating disc; 31—mounting step; 32—radial groove; 4—cap ring; 5—insertion holder; 6—lens insertion block; 61—lens slot; 62—threaded hole; 7—steel ball; 8—compression spring; 9—locking screw. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings.

[0019] like Figures 1 to 6As shown, this utility model provides an adjustable rotating tension trial frame, including a frame 1 and temples 2. The left and right sides of the frame 1 are provided with double-layered circular stepped mounting grooves 11. The bottom stepped mounting groove 11 contains a circular rotating disk 3, and the upper stepped mounting groove 11 contains a cover ring 4. The cover ring 4 and the frame 1 are welded together. The bottom of the rotating disk 3 extends out of the outer side of the frame 1. The outer side of the frame 1 is provided with scale values ​​along the circumference. The outer side of the rotating disk 3 extends into a mounting step 31. A bracket 5 with a slot is connected to the mounting step 31. The inner side of the cover ring 4 is connected to a lens insert 6. The lens insert 6 is provided with a lens slot 61. The lens insert 6 is provided with a through threaded hole 62. The bottom of the threaded hole 62 is provided with a steel ball 7, a compression spring 8, and a locking screw 9. The damping is adjusted by controlling the pressure of the steel ball 7 on the inner side of the rotating disk 3 by rotating the locking screw 9.

[0020] In the above scheme, the lens insert 6 is fixed to the cover ring 4 by screws.

[0021] Specifically, the inner side of the cover ring 4 is connected to two lens inserts 6, and the inner side of the two lens inserts 6 is provided with a lens slot 61 vertically, and the lens is inserted into the lens slot 61 from top to bottom and fixed.

[0022] In addition, two mounting steps 31 extend from the outer side of the rotating disk 3, and the inner side of the insert 5 is provided with multiple independent slots for inserting lenses with different functions.

[0023] Furthermore, the inner side of the rotating disk 3 is provided with radial grooves 32 at equal angles along the circumference. When the rotating disk 3 rotates, the steel ball 7 is close to the inner side of the rotating disk 3 and is positioned at the radial grooves 32, so that the rotating disk 3 has a pause during rotation. The angular spacing between the radial grooves 32 can be set to be relatively dense.

[0024] The improvements of this utility model are as follows:

[0025] 1. The metal scale has been removed, and the astigmatism axis is directly laser-marked onto frame 1, reducing the weight of the entire trial frame and making it more comfortable to wear;

[0026] 2. Regarding the tightness of the rotating disk 3, a mechanical adjustment structure replaces the traditional damping grease adjustment method. This avoids the loss of feel caused by the deterioration and failure of the damping grease, which could lead to premature termination of the trial frame's lifespan. The mechanical adjustment structure can basically cover the entire lifespan of the trial frame. Specifically, lens inserts 6 are installed on the cover ring 4 and fixed with screw holes on both sides; the rotating disk 3 is placed inside the frame 1, and the cover ring 4 is placed on top. The cover ring 4 and the frame 1 are welded together using an ultrasonic plastic welding machine; a steel ball 7 is placed into the threaded hole in the middle of the lens insert 6, so that the steel ball 7 falls directly to the bottom and contacts the toothed surface of the rotating disk 3; a compression spring 8 is placed into the threaded hole in the middle of the lens insert 6; and a locking screw 9 is screwed into the threaded hole in the middle of the lens insert 6 until it contacts the compression spring 8. At this point, the contact pressure between the steel ball 7 and the rotating disk 3 can be adjusted by tightening or loosening the locking screw 9, thereby adjusting the damping of the rotating disk 3 during rotation.

[0027] When the trial frame leaves the factory, the damping of the rotating disk 3 will be adjusted to the standard value. After a period of use, if the customer feels that the feel is loose, they can easily adjust the damping of the rotating disk 3 by tightening the screw 9.

[0028] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the utility model. Any simple modifications, equivalent changes, or alterations made to the above embodiments based on the technical principles of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An adjustable rotating trial frame, comprising a frame (1) and temples (2), characterized in that: The left and right sides of the mirror frame (1) are provided with double-layered circular stepped mounting grooves (11). The bottom stepped mounting groove (11) contains a circular rotating disk (3), and the upper stepped mounting groove (11) contains a cover ring (4). The cover ring (4) and the mirror frame (1) are welded together. The bottom of the rotating disk (3) extends out of the outer side of the mirror frame (1). The outer side of the mirror frame (1) is provided with scale values ​​along the circumference. The outer side of the rotating disk (3) extends out of the mounting step (31). A bracket (5) with a slot is connected to the mounting step (31). A lens insert (6) is connected to the inner side of the cover ring (4). A lens slot (61) is provided on the lens insert (6). A through threaded hole (62) is provided in the lens insert (6). A steel ball (7), a compression spring (8) and a locking screw (9) are arranged in sequence at the bottom of the threaded hole (62). The damping degree is adjusted by controlling the squeezing force of the steel ball (7) on the inner side of the rotating disk (3) by rotating the locking screw (9).

2. The adjustable rotation tension trial frame according to claim 1, characterized in that: The lens insert (6) is fixed to the cover ring (4) by screws.

3. The adjustable rotation tension trial frame according to claim 1, characterized in that: The inner side of the cover ring (4) is connected to two lens inserts (6), and the inner side of the two lens inserts (6) is provided with a lens slot (61) vertically. The lens is inserted into the lens slot (61) from top to bottom and fixed.

4. The adjustable rotation tension trial frame according to claim 1, characterized in that: The rotating disk (3) extends outwards to form two mounting steps (31) on the left and right sides. The inner side of the insert (5) is vertically provided with multiple independent slots for inserting lenses with different functions.

5. The adjustable rotation tension trial frame according to claim 1, characterized in that: The inner side of the rotating disk (3) is provided with radial grooves (32) at equal angles along the circumference. When the rotating disk (3) rotates, the steel ball (7) is close to the inner side of the rotating disk (3) and is positioned at the radial groove (32).

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