Visual chart capable of being automatically adjusted according to sitting posture height of patient

Abstract

A visual chart capable of being automatically adjusted according to the height of the sitting posture of a patient structurally comprises a fixing frame, an adjusting groove with openings in the front end, the rear end and the lower end is formed in the fixing frame, a visual chart board is arranged in the adjusting groove in a sliding mode, and the visual chart structure capable of being automatically adjusted according to the height of the sitting posture of the patient is adopted, so that the sight angles of all the patients watching the visual chart are effectively basically the same; during examination, the optometry frame is worn, in order to ensure that horizontal light emitted by a laser lamp on the optometry frame is located at the 1.0 vision value position on the visual chart board, a winding motor is controlled through a remote controller, when the horizontal light is too low, the winding motor drives a winding wheel to rotate clockwise, the winding wheel synchronously winds two winding wires, and the two winding wires are wound synchronously; the winding wire drives the visual chart board to slide upwards through the sliding block, on the contrary, the winding motor drives the winding wheel to rotate anticlockwise, the visual chart board slides downwards along with releasing of the winding wire and under the gravity cooperation of the balancing weight, and operation is convenient.

Description

Technical Field

[0001] The utility model discloses a vision chart which can be automatically adjusted according to the sitting height of a patient and belongs to the field of vision charts. Background Art

[0002] The eye chart is a chart used to measure vision. The eye charts used in China include: the international standard eye chart, the logarithmic eye chart, and the Landolt ring eye chart. Functionally, there are near eye charts and far eye charts. The eye chart is developed based on the principle of visual angle. Visual acuity is generally divided into two categories: far vision and near vision. Far vision mostly uses the international standard eye chart, which consists of 14 rows of "E" letters of different sizes and opening directions; the measurement ranges from 0.1-1.5 (or from 4.0-5.2); each row is numbered, and the visual line of the person being examined must be parallel to the row of 1.0 and 5 meters away from the eye chart. The existing wall-mounted eye chart is fixed, and patients who sit on a chair for vision examination often have different sitting heights, which will cause each patient's line of sight to be different, affecting the inspection work. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a vision chart that automatically adjusts according to the patient's sitting height, so as to solve the problem that the existing wall-mounted vision chart is in a fixed state, and patients sitting on chairs for vision examinations often have different sitting heights, which will cause each patient's line of sight to be different, affecting the examination work.

[0004] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions: a vision chart that automatically adjusts according to the patient's sitting height, and its structure includes a fixed frame, the fixed frame is provided with adjustment grooves with openings at the front, back and lower ends, a vision chart board is slidably arranged in the adjustment groove, a counterweight block is arranged at the lower end of the vision chart board, a slider is arranged on both sides of the top of the vision chart board, and slide grooves slidably connected to the sliders are arranged on both sides of the inner wall of the adjustment groove, a driving cavity communicated with the slide groove is arranged in the top of the fixed frame, a winding motor is fixedly arranged on the inner wall of the driving cavity, the rotating shaft of the winding motor faces forward, and a winding wheel is arranged for transmission, and the upper ends of the two sliders are connected with winding wires, and the winding wires extend into the driving cavity through the adjustment groove and are wound around the winding wheel.

[0005] Furthermore, it also includes a remote controller, which is connected to the winding motor via a radio signal.

[0006] Furthermore, it also includes an optometry frame, and a laser light is provided on the front edge of the optometry frame.

[0007] Furthermore, a mounting screw hole is provided at the rear end of the fixing frame.

[0008] Furthermore, a lithium battery for supplying power to the winding motor is arranged in the fixing frame.

[0009] The beneficial effects of the utility model are: adopting a vision chart structure that automatically adjusts according to the patient's sitting height, effectively making the sight angle of each patient looking at the vision chart basically the same, ensuring the uniformity of the examination, during the examination, the eye test frame is put on, to ensure that the horizontal light emitted by the laser light on the eye test frame is located at the 1.0 vision value on the vision chart board, the winding motor is controlled by a remote control, when the horizontal light is too low, the winding motor drives the winding wheel to rotate clockwise, the winding wheel will synchronously wind up the two winding lines, the winding lines will drive the vision chart board to slide upwards through the slider, conversely, the winding motor drives the winding wheel to rotate counterclockwise, as the winding line is released, the vision chart board slides downwards under the cooperation of the gravity of the counterweight block, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0011] Figure 1 This is a schematic diagram of the structure of a vision chart that can be automatically adjusted according to the patient's sitting height according to the utility model;

[0012] Figure 2 This is a partial cross-sectional structural schematic diagram of a vision chart that can be automatically adjusted according to the patient's sitting height according to the utility model;

[0013] Figure 3 It is a structural schematic diagram of an optometry frame. DETAILED DESCRIPTION

[0014] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0015] See also Figure 1 , Figure 2 , Figure 3The utility model provides a technical solution for an eye chart that can be automatically adjusted according to the sitting height of a patient: the structure includes a fixed frame 1, an adjustment slot 2 with openings at the front, rear and lower ends is provided on the fixed frame 1, an eye chart board 3 is slidably provided in the adjustment slot 2, a counterweight block 5 is provided at the lower end of the eye chart board 3, a slider 6 is provided on both sides of the top of the eye chart board 3, a slide slot 7 slidably connected to the slide slot 6 is provided on both sides of the inner wall of the adjustment slot 2, a driving cavity 8 communicating with the slide slot 7 is provided in the top of the fixed frame 1, and the inner wall of the driving cavity 8 is fixed A winding motor 9 is fixedly provided, the shaft of the winding motor 9 faces forward, and a winding wheel 10 is provided for transmission. The upper ends of the two sliders 6 are connected with winding wires 11, and the winding wires 11 extend into the driving cavity 8 through the adjustment slot 2 and are wound around the winding wheel 10. A remote controller is also included, and the remote controller is connected to the winding motor 9 by radio signal. The optometry frame 12 is also included, and a laser light 13 is provided at the front edge of the optometry frame 12. A mounting screw hole is provided at the rear end of the fixed frame 1, and a lithium battery for powering the winding motor 9 is provided in the fixed frame 1.

[0016] The eye chart structure that automatically adjusts according to the patient's sitting height is adopted, which effectively makes the line of sight angle of each patient looking at the eye chart basically the same, ensuring the consistency of the examination. During the examination, the eye test frame 12 is put on. To ensure that the horizontal light emitted by the laser lamp 13 is located at the 1.0 vision value on the eye chart board 3, the winding motor 9 is controlled by the remote control. When the horizontal light is too low, the winding motor 9 drives the winding wheel 10 to rotate clockwise, and the winding wheel 10 winds up the two winding lines 11 synchronously. The winding line 11 will drive the eye chart board 3 to slide upward through the slider 6. Conversely, the winding motor 9 drives the winding wheel 10 to rotate counterclockwise. As the winding line 11 is released, the eye chart board 3 slides downward under the cooperation of the gravity of the counterweight block 5, which is convenient to operate.

[0017] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0018] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An eye chart that automatically adjusts according to the patient's sitting height, characterized in that: The structure comprises a fixed frame (1), the fixed frame (1) being provided with an adjustment slot (2) with openings at the front, rear and lower ends, a vision chart plate (3) being slidably arranged in the adjustment slot (2), a counterweight block (5) being arranged at the lower end of the vision chart plate (3), a slider (6) being arranged on both sides of the top of the vision chart plate (3), a slide slot (7) being slidably connected to the slider (6) being arranged on both sides of the inner wall of the adjustment slot (2), a drive cavity (8) being arranged in the top of the fixed frame (1) and communicating with the slide slot (7), a winding motor (9) being fixedly arranged on the inner wall of the driving cavity (8), the rotating shaft of the winding motor (9) being forward, and a winding wheel (10) being arranged for transmission, the upper ends of the two sliders (6) being connected with a winding wire (11), the winding wire (11) extending into the driving cavity (8) through the adjustment slot (2) and being wound around the winding wheel (10).

2. The visual acuity chart according to claim 1, which is automatically adjusted according to the patient's sitting height, is characterized in that: It also includes a remote controller, which is connected to the winding motor (9) via a radio signal.

3. The visual acuity chart that automatically adjusts according to the patient's sitting height according to claim 1, characterized in that: It also comprises an optometry frame (12), wherein a laser light (13) is provided at the front edge of the optometry frame (12).

4. The visual acuity chart that automatically adjusts according to the patient's sitting height according to claim 1, characterized in that: The rear end of the fixing frame (1) is provided with mounting screw holes.

5. The visual acuity chart that automatically adjusts according to the patient's sitting height according to claim 1, characterized in that: A lithium battery for supplying power to the winding motor (9) is arranged in the fixing frame (1).

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