Portable foldable far-measuring visual chart

Abstract

The utility model discloses a portable foldable far-vision testing chart, which comprises a dial plate member, the dial plate member is provided with an inclined plane, and testing scales are arranged on the inclined plane; a supporting frame body is arranged above the dial piece, the bottom end of the supporting frame body is fixedly connected with the dial piece, the two sides of the top end of the supporting frame body are rotationally connected with a first reflection assembly and a second reflection assembly, a first reflection mirror is arranged in the first reflection assembly, and a second reflection mirror is arranged in the second reflection assembly; the first reflecting mirror is located between the dial plate piece and the second reflecting mirror and reflects the test scales on the dial plate piece to the second reflecting mirror, and the second reflecting mirror is located above the first reflecting mirror and reflects the test scales reflected to the second reflecting mirror to the eyes of a tested person. According to the utility model, the indoor space occupied by the test distance is effectively shortened; vision testing work can be carried out in a small indoor space, and the using effect of the visual chart is improved.

Description

Technical Field

[0001] The utility model relates to the field of ophthalmology, in particular to a portable foldable distance vision chart. Background Art

[0002] During a physical examination, testing vision is the most basic physical examination item, and a vision tester is needed to test vision. Existing vision testers all have problems such as large size, inconvenient transportation and carrying; Patent No. CN201520475693.X discloses a medical vision tester, which reduces the storage volume of the vision tester by folding the bracket, thereby achieving the problem of convenient carrying; however, during vision testing, it is stipulated that the scale of the vision chart should be kept at least 5 meters away from the human eye. In some areas with smaller spaces, the detection distance requirement cannot be met at all, and the vision tester with existing structure cannot be used, which brings certain troubles to the vision test work. Summary of the invention

[0003] The utility model aims to solve the above problems and provide a portable foldable distance vision chart which has simple structure and is convenient to use.

[0004] In order to achieve the above purpose, the technical solution of the utility model is:

[0005] A portable foldable distance vision chart comprises a dial member, the outer surface of which is provided with a test scale; the dial member is provided with an inclined surface and the test scale is arranged on the inclined surface; a support frame is arranged above the dial member, the bottom end of the support frame is fixedly connected to the dial member, and both sides of the top end of the support frame are rotatably connected with a first reflection component and a second reflection component, the first reflection component is provided with a first reflector, and the second reflection component is provided with a second reflector, the first reflector is located between the dial member and the second reflector and reflects the test scale on the dial member onto the second reflector, and the second reflector is located above the first reflector and reflects the test scale reflected on the second reflector into the eyes of the person being tested.

[0006] Furthermore, the first reflective component and the second reflective component have the same structure, and the first reflective component is symmetrically arranged on both sides of the supporting frame.

[0007] Furthermore, the first reflection assembly includes a first movable frame, one end of which is connected to a first connecting ear pin shaft arranged on one side of the top end of the support frame body, and the other end of the first movable frame is rotatably connected to a first fixed bracket, and the first fixed bracket is fixedly connected to a first reflector.

[0008] Furthermore, the second reflection assembly includes a second movable frame, one end of which is connected to a second connecting ear pin arranged on the other side of the top of the support frame body, and the other end of the second movable frame is rotatably connected to a second fixed frame, and the second fixed frame is fixedly connected to a second reflector.

[0009] Furthermore, a first stop mechanism is provided between the first connecting ear and the first movable frame, and between the second connecting ear and the second movable frame, and a second stop mechanism is provided between the first movable frame and the first fixed frame, and between the second movable frame and the second fixed frame.

[0010] Furthermore, the first stopping mechanism includes a first latch, and a first rotating pin is provided between the first connecting ear and the first movable frame, and between the second connecting ear and the second movable frame, and they are connected through the first rotating pin shaft; a first positioning hole and a second positioning hole are provided on the first connecting ear and the second connecting ear, and an installation positioning hole is provided on the first movable frame and the second movable frame; when the first movable frame or the second movable frame is in a horizontal state, the installation positioning hole on the first movable frame and the first positioning hole on the first connecting ear are plugged in through the first latch, and the installation positioning hole on the second movable frame and the first positioning hole on the second connecting ear are plugged in through the first latch; when the first movable frame or the second movable frame is in a vertical state, the installation positioning hole on the first movable frame and the second positioning hole on the first connecting ear are plugged in through the first latch, and the installation positioning hole on the second movable frame and the second positioning hole on the second connecting ear are plugged in through the first latch.

[0011] Furthermore, the second stopping mechanism includes a second latch, and circular limit plates are fixedly connected on both sides of the ends of the first fixed bracket and the second fixed bracket, and second rotating pins are arranged between the first movable frame and the center position of the limit plate on the first fixed bracket, and between the second movable frame and the center position of the limit plate on the second fixed bracket, and are connected through the second rotating pin shaft; a plurality of limit holes are arranged on the limit plate and the plurality of limit holes are arranged at equal intervals along the circumferential direction of the limit plate, and adjustment holes are arranged on the first movable frame and the second movable frame; when the first fixed bracket is adjusted relative to the first movable frame and the second fixed bracket is adjusted relative to the second movable frame, the adjustment hole is connected to any limit hole through the second latch.

[0012] Furthermore, the support frame includes two longitudinally arranged vertical rods, which are symmetrically arranged front to back. The bottom ends of the vertical rods are fixedly connected to the dial part, and the first connecting ear and the second connecting ear are respectively connected to the two sides of the top end of the vertical rods. The first connecting ear is arranged above the inclined surface of the dial part.

[0013] Furthermore, the first movable frame and the second movable frame each include two horizontal rods, which are symmetrically arranged front to back, and one end of the two horizontal rods is respectively connected to the first connecting ear or the second connecting ear pin at the top of the two vertical rods, and the other ends of the two horizontal rods are respectively located on the front and rear sides of the first fixed bracket or the second fixed bracket and are pin-connected to the first fixed bracket or the second fixed bracket.

[0014] Furthermore, the dial component includes a light box, one side of the light box is provided with an inclined surface, the inclined surface is an inclined surface of a transparent material and a test scale is provided on the inclined surface, a light source component is provided in the light box, and a control switch for controlling the opening and closing state of the light source component is provided on the outside of the light box.

[0015] Compared with the prior art, the utility model has the following advantages and positive effects:

[0016] When the utility model is used, the first reflection component and the second reflection component are opened, and the test scale on the inclined surface of the dial part is irradiated onto the first reflection mirror of the first reflection component, and then reflected by the first reflection mirror to the second reflection mirror of the second reflection component, and finally enters the eyes of the person being tested; the test light path is extended after two reflections, thereby effectively shortening the indoor space occupied by the test distance; the vision test work can be carried out in a smaller indoor space, thereby improving the use effect of the vision chart;

[0017] On the other hand, when the utility model is not in use, it can rotate the first fixed bracket and the first reflector to the inner side of the first movable frame, rotate the second fixed bracket and the second reflector to the inner side of the second movable frame, and then rotate the first fixed bracket and the second fixed bracket to one side of the support frame, thereby effectively reducing the space occupied by the eye chart, making it convenient for people to store, transport and carry the eye chart, and further improving the use effect of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 This is the front view of the utility model in the unfolded state;

[0020] Figure 2 for Figure 1 A magnified view of the local structure at position A in the middle;

[0021] Figure 3 for Figure 1 A magnified view of the local structure at position B in the middle;

[0022] Figure 4 This is the front view of the utility model in the folded state;

[0023] Figure 5 It is a top view of the utility model in the unfolded state. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work, any modifications, equivalent replacements, improvements, etc., should be included in the protection scope of the utility model.

[0025] like Figures 1 to 5 As shown, the present embodiment discloses a portable foldable distance vision chart, including a dial member, the dial member is provided with an inclined surface and the test scale is arranged on the inclined surface; a support frame 4 is arranged above the dial member, the bottom end of the support frame 4 is fixedly connected to the dial member, and both sides of the top of the support frame 4 are rotatably connected with a first reflection component and a second reflection component, the first reflection component is provided with a first reflector 7, and the second reflection component is provided with a second reflector 10, the first reflector 7 is located between the dial member and the second reflector 10 and reflects the test scale on the dial member onto the second reflector 10, and the second reflector 10 is located above the first reflector 7 and reflects the test scale reflected on the second reflector 10 into the eyes of the tested person.

[0026] The first reflective component and the second reflective component have the same structure, and the first reflective component is symmetrically arranged on both sides of the supporting frame 4 .

[0027] The first reflection assembly includes a first movable frame 5, one end of which is pin-connected to a first connecting ear 401 arranged on the right side of the top of the support frame body 4, and the other end of the first movable frame 5 is rotatably connected to a first fixed bracket 6, and a first reflector 7 is fixedly connected to the first fixed bracket 6.

[0028] The second reflection assembly includes a second movable frame 8, one end of which is pin-connected to a second connecting ear 402 arranged on the left side of the top of the support frame body 4, and the other end of the second movable frame 8 is rotatably connected to a second fixed frame 9, and a second reflector 10 is fixedly connected to the second fixed frame 9.

[0029] The support frame 4 is composed of two vertical rods arranged longitudinally, which are symmetrically arranged front to back. The bottom ends of the vertical rods are fixedly connected to the dial part, and the first connecting ear 401 and the second connecting ear 402 are respectively connected to the two sides of the top end of the vertical rods. The first connecting ear 401 is arranged above the inclined surface of the dial part.

[0030] The first movable frame 5 and the second movable frame 8 are both two horizontal rods, which are symmetrically arranged front to back. One end of the two horizontal rods is pin-connected to the first connecting ear 401 or the second connecting ear 402 at the top of the two vertical rods, and the other ends of the two horizontal rods are respectively located at the front and rear sides of the first fixed bracket 6 or the second fixed bracket 9 and are pin-connected to the first fixed bracket 6 or the second fixed bracket 9.

[0031] The first movable frame and the second movable frame can both rotate 90 degrees relative to the supporting frame body, which is mainly used to achieve the supporting effect on the first fixed bracket and the second fixed bracket; the first fixed bracket can rotate freely relative to the first movable frame, and the second fixed bracket can rotate freely relative to the second movable frame, which is mainly used to install the first reflector and the second reflector, and adjust the inclination angle of the first reflector and the second reflector through the rotation action.

[0032] A first stop mechanism is provided between the first connecting ear 401 and the first movable frame 5 and between the second connecting ear 402 and the second movable frame 8 . A second stop mechanism is provided between the first movable frame 5 and the first fixed support 6 and between the second movable frame 8 and the second fixed support 9 .

[0033] The first stop mechanism includes a first latch 14, and a first rotating pin 12 is provided between the first connecting ear 401 and the first movable frame 5, and between the second connecting ear 402 and the second movable frame 8, and they are connected by the first rotating pin 12 pin shaft; the first connecting ear 401 and the second connecting ear 402 are provided with a first positioning hole 4011 and a second positioning hole 4012, and the first movable frame 5 and the second movable frame 8 are provided with an installation positioning hole; when the first movable frame 5 or the second movable frame 8 is in a horizontal state, the installation positioning hole on the first movable frame 5 and the first positioning hole 4011 on the first connecting ear 401 are plugged into each other through the first latch 14, and the installation positioning hole on the second movable frame 8 and the first positioning hole on the second connecting ear are plugged into each other through the first latch; when the first movable frame 5 or the second movable frame 8 is in a vertical state, the installation positioning hole on the first movable frame 5 and the second positioning hole 4012 on the first connecting ear 401 are plugged into each other through the first latch 14, and the installation positioning hole on the second movable frame 8 and the second positioning hole on the second connecting ear are plugged into each other through the first latch.

[0034] The first stop structure usually has two states. The first state is an unfolded state, in which the first movable frame and the second movable frame are both kept in a horizontal state; the second state is a folded state, in which the first movable frame and the second movable frame are both kept in a vertical state.

[0035] The second stop mechanism includes a second latch 15, and circular limit plates 11 are fixedly connected on both sides of the ends of the first fixed bracket 6 and the second fixed bracket 9. The limit plates 11 are located on the inner side of the ends of the first movable frame 5 or the second movable frame 8. A second rotating pin 13 is provided between the center positions of the limit plates 11 on the first movable frame 5 and the first fixed bracket 6, and between the center positions of the limit plates 11 on the second movable frame 8 and the second fixed bracket 9, and is connected by the second rotating pin 13 pin shaft; a plurality of limit holes 1101 are provided on the limit plate 11, and the plurality of limit holes 1101 are arranged at equal intervals along the circumferential direction of the limit plate 11, and the first movable frame 5 and the second movable frame 8 are provided with adjustment holes corresponding to the limit holes 1101; when the first fixed bracket 6 is adjusted relative to the first movable frame 5, and the second fixed bracket 9 is adjusted relative to the second movable frame 8, the adjustment hole is plugged into any limit hole 1101 through the second latch 15.

[0036] The rotation angles of the first fixed bracket and the second fixed bracket can be adjusted at will. After adjustment, the positioning operation between the fixed bracket and the movable bracket can be achieved by simply inserting the second latch into the adjustment hole and any corresponding limit hole.

[0037] The dial component is a light box 1, and an inclined surface 101 is arranged on one side of the light box 1. The inclined surface 101 is an inclined surface of a transparent material and a test scale is arranged on the inclined surface 101. A light source component 2 is arranged inside the light box 1, and a control switch 3 for controlling the opening and closing state of the light source component 2 is arranged outside the light box 1.

[0038] The light box can improve the clarity of the test scale, making it easier for people to test their vision.

[0039] When the utility model is used, the first reflection component and the second reflection component are opened, and the test scale on the inclined surface of the dial part is irradiated onto the first reflection mirror of the first reflection component, and then reflected by the first reflection mirror to the second reflection mirror of the second reflection component, and finally enters the eyes of the person being tested; the test light path is extended after two reflections, thereby effectively shortening the indoor space occupied by the test distance; the vision test work can be carried out in a smaller indoor space, thereby improving the use effect of the vision chart;

[0040] On the other hand, when the utility model is not in use, it can rotate the first fixed bracket and the first reflector to the inner side of the first movable frame, rotate the second fixed bracket and the second reflector to the inner side of the second movable frame, and then rotate the first fixed bracket and the second fixed bracket to one side of the support frame, thereby effectively reducing the space occupied by the eye chart, making it convenient for people to store, transport and carry the eye chart, and further improving the use effect of the utility model.

Claims

1. A portable foldable distance vision chart, comprising a dial, the outer surface of which is provided with a test scale; characterized in that: The dial part is provided with an inclined surface and the test scale is arranged on the inclined surface; a support frame is arranged above the dial part, the bottom end of the support frame is fixedly connected to the dial part, and the first reflection component and the second reflection component are rotatably connected on both sides of the top end of the support frame, the first reflection component is provided with a first reflector, and the second reflection component is provided with a second reflector, the first reflector is located between the dial part and the second reflector and reflects the test scale on the dial part onto the second reflector, and the second reflector is located above the first reflector and reflects the test scale reflected on the second reflector into the eyes of the person being tested.

2. The portable foldable telescopic visual acuity chart according to claim 1, characterized in that: The first reflective component and the second reflective component have the same structure, and the first reflective component is symmetrically arranged on both sides of the supporting frame.

3. The portable foldable telescopic visual acuity chart according to claim 2, characterized in that: The first reflection assembly includes a first movable frame, one end of which is connected to a first connecting ear pin arranged on one side of the top end of the support frame body, and the other end of the first movable frame is rotatably connected to a first fixed bracket, and the first fixed bracket is fixedly connected to a first reflector.

4. The portable foldable telescopic visual acuity chart according to claim 3, characterized in that: The second reflection assembly includes a second movable frame, one end of which is connected to a second connecting ear pin arranged on the other side of the top of the support frame body, and the other end of the second movable frame is rotatably connected to a second fixed bracket, and the second fixed bracket is fixedly connected to a second reflector.

5. The portable foldable telescopic visual acuity chart according to claim 4, characterized in that: A first stop mechanism is provided between the first connecting ear and the first movable frame, and between the second connecting ear and the second movable frame; a second stop mechanism is provided between the first movable frame and the first fixed frame, and between the second movable frame and the second fixed frame.

6. The portable foldable telescopic visual acuity chart according to claim 5, characterized in that: The first stop mechanism includes a first latch, and a first rotating pin is provided between the first connecting ear and the first movable frame, and between the second connecting ear and the second movable frame, and they are connected through the first rotating pin; the first connecting ear and the second connecting ear are provided with a first positioning hole and a second positioning hole, and the first movable frame and the second movable frame are provided with an installation positioning hole; when the first movable frame or the second movable frame is in a horizontal state, the installation positioning hole on the first movable frame is plugged with the first positioning hole on the first connecting ear through the first latch, and the installation positioning hole on the second movable frame is plugged with the first positioning hole on the second connecting ear through the first latch; when the first movable frame or the second movable frame is in a vertical state, the installation positioning hole on the first movable frame is plugged with the second positioning hole on the first connecting ear through the first latch, and the installation positioning hole on the second movable frame is plugged with the second positioning hole on the second connecting ear through the first latch.

7. The portable foldable telescopic visual acuity chart according to claim 6, characterized in that: The second stop mechanism includes a second latch, and circular limit plates are fixedly connected on both sides of the ends of the first fixed bracket and the second fixed bracket. A second rotating pin is arranged between the first movable frame and the center position of the limit plate on the first fixed bracket, and between the second movable frame and the center position of the limit plate on the second fixed bracket, and they are connected through the second rotating pin shaft; a plurality of limit holes are arranged on the limit plate and the plurality of limit holes are arranged at equal intervals along the circumferential direction of the limit plate, and adjustment holes are arranged on the first movable frame and the second movable frame; when the first fixed bracket is adjusted relative to the first movable frame and the second fixed bracket is adjusted relative to the second movable frame, the adjustment hole is plugged into any limit hole through the second latch.

8. The portable foldable telescopic visual acuity chart according to claim 7, characterized in that: The support frame includes two vertical rods arranged longitudinally, which are symmetrically arranged front to back. The bottom ends of the vertical rods are fixedly connected to the dial part, and the first connecting ear and the second connecting ear are respectively connected to the two sides of the top end of the vertical rods. The first connecting ear is arranged above the inclined surface of the dial part.

9. The portable foldable telescopic visual acuity chart according to claim 8, characterized in that: The first movable frame and the second movable frame each include two horizontal rods, which are symmetrically arranged front to back, one end of the two horizontal rods are respectively connected to the first connecting ear or the second connecting ear pin at the top of the two vertical rods, and the other ends of the two horizontal rods are respectively located at the front and rear sides of the first fixed bracket or the second fixed bracket and are pin-connected to the first fixed bracket or the second fixed bracket.

10. The portable foldable telescopic visual acuity chart according to claim 9, characterized in that: The dial component includes a light box, one side of the light box is provided with an inclined surface, the inclined surface is made of a transparent material and has a test scale, a light source component is provided in the light box, and a control switch for controlling the opening and closing state of the light source component is provided outside the light box.

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