A portable vision testing device

Abstract

The utility model belongs to visual inspection technical field, concretely is a kind of portable visual inspection device, including box and rotating stand, the opening slot is established in the front of box;The hollow regular polygon column structure of rotating stand, rotation is installed in the inside of box, each side of rotating stand is rotationally installed with disc, and the disc front surface is installed with letter E;The inside of rotating stand is equipped with transverse lever, and one end passes the left end of rotating stand and exposes outwardly.This utility model can rotate and switch the mode of different line letter E, reduce overall length and occupied space, it is convenient to carry and go out use, and letter E of each line can also be limited in fixed height area by the mode, improve visual inspection accuracy, and finally letter E orientation can also be adjusted randomly.

Description

Technical Field

[0001] This utility model belongs to the field of vision testing technology, and in particular relates to a portable vision testing device. Background Technology

[0002] A visual acuity chart is a chart used to measure visual acuity. It is one of the basic tools available for visual acuity testing and is widely used in schools, hospitals, and optical centers. It can be used not only to test visual acuity but also to conduct vision training to relax the ciliary muscles of the eyes and relieve eye strain from close-up work.

[0003] Currently, the structure of the eye chart is fixed, and its overall length is too long, resulting in excessive space occupation. It is inconvenient to carry when on missions and is prone to creases, which affects normal vision testing operations.

[0004] To address the aforementioned problems, this application proposes a portable vision testing device. Utility Model Content

[0005] The purpose of this invention is to provide a portable vision testing device that solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is a portable vision testing device, including a box and a rotating frame, wherein an opening slot is provided at the front of the box; The hollow regular polygonal column structure of the rotating frame is rotatably installed inside the box. Each side of the rotating frame is rotatably mounted with a disc, and the front surface of the disc is mounted with the letter E. The inner side of the rotating frame is provided with a horizontal lever, one end of which passes through the left end of the rotating frame and protrudes outward; The rear end of the disc is a rotating disk located on the inner side of the rotating frame. A bracket is fixedly connected to the rear end of the rotating disk. The lever is located between the rotating disk and the bracket to convert the lateral force into the rotational force of the rotating disk.

[0007] Furthermore, a bushing is fixedly installed on the right end of the disc, and a protrusion is rotatably connected to the right end of the lever. The right end of the protrusion is slidably installed inside the bushing.

[0008] Furthermore, the rotating frame has a positioning hole inside, which is rotatably connected to the shaft between the disc and the rotating disk.

[0009] Furthermore, four vertically intersecting baffles protrude from the outer side of the shaft between the rotating disk and the support.

[0010] Furthermore, the outer side of the lever has protruding bumps in sections, which are used to move the baffle to drive the disc to rotate.

[0011] Furthermore, the outer side of the rotating disk has a triangular protrusion corresponding to the baffle.

[0012] Furthermore, a positioning block is fixedly installed on the inner side of the rotating frame, one side of which is a slope that abuts against the protrusion.

[0013] This utility model has the following beneficial effects: This invention integrates multiple rows of letters E onto a disc by combining a box and a rotating frame. This allows users to switch between different rows of letters E by rotating the disc, thus replacing an eye chart for vision testing when out and about. It is convenient to carry and use, and the box protects the rotating frame from bumps and damage when out and about.

[0014] This invention combines the letter E with a disc, allowing the letter E to randomly adjust its orientation during vision testing by using a lever to rotate the disc. A positioning block then fixes the letter E in a horizontal or vertical position, thus preventing vision testing errors caused by the letter E's orientation being memorized beforehand.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall appearance structure of this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the rotating frame and the box body combination of this utility model; Figure 3 This is a schematic diagram of the inner structure of the rotating frame of this utility model; Figure 4 This is a schematic diagram of the lever and bushing assembly structure of this utility model; Figure 5 This is a partially enlarged structural diagram of part A of this utility model; The attached diagram lists the components represented by each number as follows: In the picture: 1. Box body; 2. Rotating frame; 11. Opening groove; 201. Positioning hole; 202. Positioning block; 21. Disc; 211. Rotating disk; 2111. Protrusion; 212. Support; 213. Baffle; 22. Lever; 221. Protrusion; 23. Bushing. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Please see Figure 1-5 As shown, this utility model is a portable vision testing device, including a box body 1 and a rotating frame 2, with an opening slot 11 provided at the front of the box body 1; The rotating frame 2 is a hollow regular polygonal column structure that is rotatably installed inside the box 1. Each side of the rotating frame 2 is rotatably installed with a disc 21. The front surface of the disc 21 is equipped with the letter E. The rotating disc 21 is rotated to adjust the orientation of the letter E, thereby avoiding the fixed orientation being memorized by the patient. The inner side of the rotating frame 2 is provided with a horizontal lever 22, one end of which passes through the left end of the rotating frame 2 and protrudes outward. By moving the lever 22, the rotating frame 2 is rotated to switch different faces to display different sizes of the letter E. The lever 22 is slidably connected to the left end of the rotating frame 2 through a hole whose diameter is 3 times that of the lever 22. At this time, the protruding end of the lever 22 can be raised or lowered. The rear end of the disc 21 is a rotating disc 211, located on the inner side of the rotating frame 2. The rear end of the rotating disc 211 is fixedly connected to a bracket 212. The lever 22 is located between the rotating disc 211 and the bracket 212, converting the lateral force into the rotational force of the rotating disc 211. Four perpendicularly intersecting baffles 213 protrude from the outer side of the shaft between the rotating disc 211 and the bracket 212. The outer side of the lever 22 has protrusions 221 in sections, which are used to move the baffles 213 to drive the disc 21 to rotate. When the lever 22 is pulled outward, the protrusions 221 abut against the baffles 213 and push them, thereby driving the rotating disc 211 to rotate. In this way, the lateral pulling force can be converted into the rotational force of the rotating disc 211. In addition, the diameter of the hole that slides between the lever 22 and the left end of the rotating frame 2 is relatively large. After the lever 22 is pulled out, its exposed end is lifted upward, releasing the contact between the protrusions 221 and the baffles 213, thereby allowing the rotating disc 211 to rotate freely, achieving the effect of randomly adjusting the orientation of the letter E. The right end of the disc 21 is fixedly fitted with a bushing 23, and the right end of the lever 22 is rotatably connected to a protrusion 221, so that the lever 22 can be lifted upward after being pulled out. The protruding circular block on the right end of the protrusion 221 is slidably installed inside the bushing 23.

[0021] The rotating frame 2 has a positioning hole 201 inside, which is rotatably connected to the shaft between the disc 21 and the rotating disk 211.

[0022] The rotating disk 211 has a triangular protrusion 2111 on its outer side, corresponding to the baffle 213. The protrusion 2111 is made of elastic rubber or elastic sponge. The inner side of the rotating frame 2 is fixedly installed with a positioning block 202, one side of which is a slope that abuts against the slope of the protrusion 2111. After this arrangement, the protrusion 2111 can be blocked by the slope of the positioning block 202 when the rotational force is about to disappear, thereby fixing the orientation of the letter E to be horizontal or vertical.

[0023] Understandably, this invention can reduce the overall length and space occupied by rotating and switching different rows of letters E, making it convenient to carry and use when going out. At the same time, it can also limit the letters E in each row to a fixed height area, improving the accuracy of vision detection. Finally, it can also randomly adjust the orientation of the letters E.

[0024] A specific application of the operation process of this embodiment is as follows: After the box 1 is hung on the wall, the rotating frame 2 is rotated by moving the lever 22, so that the disc 21 with different sizes of letters E is placed in the opening slot 11 for vision testing or vision training; further, the lever 22 is pulled outward, and the baffle 213 is moved by the protrusion 221, thereby driving the rotating disk 211 and the disc 21 to rotate, thereby randomly adjusting the orientation of the letter E. During the rotation of the disc 21, the protrusion 2111 is blocked by the slope on one side of the positioning block 202, so that the disc 21 rotates, thereby stopping the letter E in a horizontal or vertical state for vision testing. Finally, the lever 22 is slightly lifted and pushed, so that the protrusion 221 is returned to the inside of the bushing 23; during this period, the pushing force applied by the lever 22 will cause the protrusion 2111 to be compressed when it contacts the positioning block 202, so that it continues to rotate. During the rotation, the rotational force continues to disappear, and finally, when it is close to disappearing completely, it is blocked by the positioning block 202 to form a positioning.

[0025] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A portable vision testing device, characterized in that: It includes a box body (1) and a rotating frame (2), and the box body (1) has an opening slot (11) at the front. The hollow regular polygonal column structure of the rotating frame (2) is rotatably installed inside the box (1). Each side of the rotating frame (2) is rotatably installed with a disc (21), and the front surface of the disc (21) is installed with the letter E. The inner side of the rotating frame (2) is provided with a horizontal lever (22), one end of which passes through the left end of the rotating frame (2) and protrudes outward; The rear end of the disc (21) is a rotating disc (211), located on the inner side of the rotating frame (2). The rear end of the rotating disc (211) is fixedly connected to a bracket (212). The lever (22) is located between the rotating disc (211) and the bracket (212) to convert the lateral force into the rotational force of the rotating disc (211).

2. The portable vision testing device according to claim 1, characterized in that: A bushing (23) is fixedly installed on the right end of the disc (21), and the right end of the lever (22) is rotatably connected to a protrusion (221). The right end of the protrusion (221) is slidably installed inside the bushing (23).

3. The portable vision testing device according to claim 1, characterized in that: The rotating frame (2) has a positioning hole (201) inside, which is rotatably connected to the shaft between the disc (21) and the rotating disk (211).

4. The portable vision testing device according to claim 1, characterized in that: Four vertically intersecting baffles (213) protrude from the outer side of the shaft between the rotating disk (211) and the support (212).

5. The portable vision testing device according to claim 4, characterized in that: The outer side of the lever (22) has protruding protrusions (221) for moving the baffle (213) to drive the disc (21) to rotate.

6. The portable vision testing device according to claim 4, characterized in that: The outer side of the rotating disk (211) has a triangular protrusion (2111) corresponding to the baffle (213).

7. The portable vision testing device according to claim 6, characterized in that: The inner side of the rotating frame (2) is fixedly installed with a positioning block (202), one side of which is a slope that abuts against the protrusion (2111).

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