Camera obscura device for vision screening instrument

By designing the outer box housing and the inner box housing in the concealed box device of the vision screener, and setting three reflectors in the inner box housing, the problem of excessive volume of the traditional concealed box device is solved, and a compact design is achieved, which is easy to move and store, while ensuring the anti-interference ability of detection.

CN222737859UActive Publication Date: 2025-04-11ZHEJIANG FUBAO INTELLIGENT TECH CO LTD
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Patent Information

Application Number
CN202421948846.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-12
Publication Date
2025-04-11
Estimated Expiration
2034-08-12

AI Technical Summary

Technical Problem

The traditional concealer device used in vision screeners is large in size, increasing the overall size of the equipment, resulting in inconvenience in storage and transportation.

Method used

A concealed box device including an outer box housing and an inner box housing is designed. Three reflectors are arranged in the inner box housing to reduce the installation inclination angle of a single reflector through three reflections, thereby reducing the position-occupation volume of the reflector and reducing the overall volume of the concealed box device.

Benefits of technology

It realizes the compact design of the concealer device, which is easy to move and store, and ensures the anti-environmental interference ability of the vision screener during detection.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a camera obscura device for a vision screening instrument, which comprises an outer box shell with a first inner cavity, the front part of the outer box shell is provided with an inspection opening communicated with the first inner cavity, the front part of the outer box shell is also provided with a first mounting cavity for fixedly mounting the vision screening instrument, and the first mounting cavity is positioned above the inspection opening; the inner box shell is provided with a second inner cavity, the first inner cavity is formed in the outer box shell, a first opening and a second opening are formed in the front portion of the inner box shell, the first opening is communicated with the first installation cavity and the second inner cavity, and the second opening is communicated with the inspection opening and the second inner cavity; the first reflective mirror is arranged at the position, opposite to the first opening, of the second inner cavity; the second reflective mirror is arranged at the position, adjacent to the second opening, of the second inner cavity; the third reflector is arranged at the position, opposite to the second opening, of the second inner cavity and located between the first reflector and the second reflector. The overall size of the camera obscura device is reduced, so that the camera obscura device is convenient to move and store.
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Description

Technical Field

[0001] The utility model relates to a vision screening instrument component, in particular to a dark box device used for the vision screening instrument, and belongs to the technical field of vision detection equipment. Background Art

[0002] A vision screener is a medical device used to quickly detect human vision. In order to avoid interference from external light and provide a relatively independent testing environment for the examinee, the vision screener usually needs to be equipped with a dark box device. However, in order to fully isolate external light, the traditional dark box device used for vision screeners is usually large in size. This large design not only increases the size of the vision screener, but also brings inconvenience to the storage and transportation of the equipment. Utility Model Content

[0003] Based on the above background, the purpose of the utility model is to provide a dark box device for a vision screening instrument which is easy to move and store.

[0004] In order to achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions:

[0005] A dark box device for a vision screening instrument, comprising:

[0006] An outer box shell having a first inner cavity, wherein the front portion of the outer box shell is provided with an inspection port communicating with the first inner cavity, and the front portion of the outer box shell is further provided with a first mounting cavity for fixing and mounting a vision screening instrument, wherein the first mounting cavity is located above the inspection port;

[0007] An inner box housing having a second inner cavity is arranged in the first inner cavity of the outer box housing, and a first opening and a second opening are arranged at the front of the inner box housing, wherein the first opening communicates with the first installation cavity and the second inner cavity, and the second opening communicates with the inspection port and the second inner cavity;

[0008] a first reflector, disposed at a position where the second inner cavity is opposite to the first opening;

[0009] a second reflector, disposed at a position adjacent to the second inner cavity and the second opening;

[0010] The third reflector is disposed at a position where the second inner cavity is opposite to the second opening and is located between the first reflector and the second reflector.

[0011] Preferably, the inner box shell includes an upper box part, an inclined connecting part and a lower box part connected in sequence from top to bottom, the inclined connecting part is inclined, and the top of the inclined connecting part is closer to the rear of the outer box shell than the bottom thereof, the first opening is arranged at the front of the upper box part, the rear of the upper box part is connected to the rear of the lower box part through the inclined connecting part, and the second opening is arranged at the front of the lower box part.

[0012] Preferably, the first reflector is fixedly mounted on the rear wall of the upper box portion, the first reflector is tilted, and the bottom of the first reflector is closer to the rear of the outer box shell than the top thereof.

[0013] Preferably, the second reflector is fixedly mounted on the front wall of the lower box portion, the second reflector is tilted, and the top of the second reflector is closer to the front of the outer box shell than the bottom thereof.

[0014] Preferably, the third reflector is fixedly mounted on the rear wall of the lower box portion, the third reflector is tilted, and the bottom of the third reflector is closer to the rear of the outer box shell than the top thereof.

[0015] Preferably, a first cover body is further provided at the front of the outer box shell, the first cover body covers the first installation cavity, and an operation port is provided on the surface of the first cover body.

[0016] Preferably, a light shield is further provided at the front of the outer box shell, which surrounds the inspection port and protrudes from the front surface of the outer box shell.

[0017] Preferably, the front portion of the outer box shell is further provided with a second installation cavity for fixedly installing the printer, and the second installation cavity is located below the inspection port.

[0018] Preferably, a second cover is further provided at the front of the outer box shell, and the second cover covers the second installation cavity.

[0019] Preferably, the outer box shell includes an outer box front shell and an outer box rear shell, the outer box front shell and the outer box rear shell are detachably fixedly connected, and the inspection port and the first installation cavity are both arranged on the outer box front shell.

[0020] Compared with the prior art, the utility model has the following advantages:

[0021] The utility model discloses a dark box device for a vision screening instrument, which provides a dark box environment for the vision screening instrument through an outer box shell and an inner box shell, thereby ensuring the ability of the vision screening instrument to resist environmental interference during detection. In addition, three reflectors are arranged in the inner box shell, which form three reflections on the light path between the vision screening instrument and the human eye at the inspection port, thereby reducing the installation inclination angle of a single reflector, thereby reducing the occupied volume of the reflector, reducing the overall volume of the dark box device, and making the dark box device easy to move and store. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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 in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 It is a three-dimensional structural schematic diagram of a dark box device for a vision screening instrument of the utility model;

[0024] Figure 2 This is a schematic diagram of the main structure of a dark box device for a vision screening instrument of the utility model;

[0025] Figure 3 yes Figure 2 AA cross-section diagram of ;

[0026] Figure 4 It is a schematic diagram of the internal structure of a dark box device for a vision screening instrument of the utility model;

[0027] In the figure: 1. outer box shell; 2. inner box shell; 3. first reflector; 4. second reflector; 5. third reflector; 6. vision screener; 101. first inner cavity; 102. inspection port; 103. first installation cavity; 104. first cover; 105. operation port; 106. light shield; 107. second installation cavity; 108. second cover; 109. outer box front shell; 110. outer box rear shell; 201. second inner cavity; 202. first opening; 203. second opening; 204. upper box part; 205. inclined connecting part; 206. lower box part; 601. infrared lamp beads. DETAILED DESCRIPTION

[0028] The technical solution of the utility model is further described in detail below through specific embodiments and in combination with the accompanying drawings. It should be understood that the implementation of the utility model is not limited to the following embodiments, and any form of modification and / or change made to the utility model will fall within the protection scope of the utility model.

[0029] In the present invention, unless otherwise specified, all parts and percentages are weight units, and the equipment and raw materials used can be purchased from the market or are commonly used in the field. The methods in the following embodiments, unless otherwise specified, are conventional methods in the field. The components or equipment in the following embodiments, unless otherwise specified, are universal standard parts or components known to those skilled in the art, and their structures and principles are known to those skilled in the art through technical manuals or conventional experimental methods.

[0030] The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. In the following detailed description, for ease of explanation, many specific details are described to provide a comprehensive understanding of the embodiments of the present invention. However, one or more embodiments may also be implemented by those skilled in the art without these specific details.

[0031] The embodiment of the utility model discloses a dark box device for a vision screening instrument 6, such as Figure 1-3 As shown, the dark box device includes an outer box housing 1 having a first inner cavity 101 , an inner box housing 2 having a second inner cavity 201 , a first reflector 3 , a second reflector 4 and a third reflector 5 .

[0032] An inspection port 102 communicating with the first inner cavity 101 is provided at the front of the outer box shell 1 . A first installation cavity 103 for fixing and installing the vision screening device 6 is also provided at the front of the outer box shell 1 . The first installation cavity 103 is located above the inspection port 102 .

[0033] The inner box shell 2 is disposed in the first inner cavity 101 of the outer box shell 1 . A first opening 202 and a second opening 203 are disposed at the front of the inner box shell 2 . The first opening 202 connects the first installation cavity 103 with the second inner cavity 201 . The second opening 203 connects the inspection port 102 with the second inner cavity 201 .

[0034] The first reflector 3 is disposed at a position where the second inner cavity 201 is opposite to the first opening 202 , the second reflector 4 is disposed at a position where the second inner cavity 201 is adjacent to the second opening 203 , and the third reflector 5 is disposed at a position where the second inner cavity 201 is opposite to the second opening 203 and is located between the first reflector 3 and the second reflector 4 .

[0035] Three reflectors are arranged in the inner box shell 2, which form three reflections on the light path between the vision screening device 6 and the human eye at the inspection port 102, reduce the installation inclination angle of a single reflector, thereby reducing the volume occupied by the reflector, reducing the overall volume of the darkroom device, and making the darkroom device easy to move and store.

[0036] Specifically, the inner box shell 2 includes an upper box portion 204, an inclined connecting portion 205 and a lower box portion 206 which are connected in sequence from top to bottom. The inclined connecting portion 205 is arranged obliquely, and the top of the inclined connecting portion 205 is closer to the rear of the outer box shell 1 relative to its bottom. The first opening 202 is arranged at the front of the upper box portion 204, the rear of the upper box portion 204 is connected to the rear of the lower box portion 206 through the inclined connecting portion 205, and the second opening 203 is arranged at the front of the lower box portion 206. Through such an arrangement, the inner box shell 2 forms a structure with a cross-section approximately in a horizontal U shape, and the first opening 202 and the second opening 203 are formed at both ends of the front portion.

[0037] Specifically, the first reflector 3 is fixedly mounted on the rear wall of the upper box portion 204, the first reflector 3 is tilted, and the bottom of the first reflector 3 is closer to the rear of the outer box shell 1 than the top thereof. The second reflector 4 is fixedly mounted on the front wall of the lower box portion 206, the second reflector 4 is tilted, and the top of the second reflector 4 is closer to the front of the outer box shell 1 than the bottom thereof. The third reflector 5 is fixedly mounted on the rear wall of the lower box portion 206, the third reflector 5 is tilted, and the bottom of the third reflector 5 is closer to the rear of the outer box shell 1 than the top thereof.

[0038] The optical path formed by the first reflector 3, the second reflector 4 and the third reflector 5 is as follows: Figure 3 As shown by the dotted line, an infrared lamp bead 601 capable of emitting infrared light is provided at the end of the vision screening instrument 6. The infrared light is reflected by the first reflector 3 to the second reflector 4, and then by the second reflector 4 to the third reflector 5, and then by the third reflector 5 to the inspection port 102. In addition, the light from the human eye at the inspection port 102 is reflected by the third reflector 5, the second reflector 4, and the first reflector 3 in sequence to the vision screening instrument 6 for detection. In order to improve the accuracy of screening, as Figure 4 As shown, the vision screening instrument 6 can be provided with a plurality of infrared lamp beads 601, and arranged in an array to increase the illumination amount of infrared light.

[0039] The first reflector 3 , the second reflector 4 and the third reflector 5 form a compact reflective light path, and the inclination angle of each reflector is smaller than that of the prior art, thus occupying a smaller space.

[0040] Specifically, the front of the outer box shell 1 is further provided with a first cover 104, which covers the first installation cavity 103, and the surface of the first cover 104 is provided with an operation port 105. The first cover 104 protects the vision screening instrument 6, and the operation port 105 facilitates personnel to interact with the vision screening instrument 6.

[0041] Specifically, a light shield 106 is further provided at the front of the outer box housing 1, and the light shield 106 surrounds the inspection port 102 and protrudes from the front surface of the outer box housing 1. The shape of the front portion of the light shield 106 is designed to conform to the contour of the eye area of ​​the human face, so that when the human eye is at the inspection port 102, the front portion of the light shield 106 can fit the eye area of ​​the human face.

[0042] Specifically, the front of the outer box shell 1 is also provided with a second installation cavity 107 for fixing and installing a printer, and the second installation cavity 107 is located below the inspection port 102. The printer is electrically connected to the vision screening instrument 6, and after the vision screening instrument 6 completes the detection, the printer can print the detection result.

[0043] Specifically, a second cover 108 is further provided at the front of the outer box housing 1, and the second cover 108 covers the second installation cavity 107. The second cover 108 protects the printer.

[0044] Specifically, the outer box housing 1 includes an outer box front shell 109 and an outer box rear shell 110, which are detachably fixedly connected, and the inspection port 102 and the first installation cavity 103 are both provided on the outer box front shell 109. The outer box front shell 109 and the outer box rear shell 110 form a split structure, which is convenient for disassembly and assembly and maintenance of internal components.

[0045] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A dark box device for a vision screening instrument (6), characterized in that: The dark box device for the vision screening instrument (6) comprises: An outer box shell (1) having a first inner cavity (101), the front portion of the outer box shell (1) being provided with an inspection port (102) communicating with the first inner cavity (101), the front portion of the outer box shell (1) being further provided with a first mounting cavity (103) for fixing and mounting a vision screening device (6), the first mounting cavity (103) being located above the inspection port (102); An inner box shell (2) having a second inner cavity (201), arranged in the first inner cavity (101) of the outer box shell (1), a first opening (202) and a second opening (203) being arranged at the front of the inner box shell (2), the first opening (202) being connected to the first installation cavity (103) and the second inner cavity (201), and the second opening (203) being connected to the inspection port (102) and the second inner cavity (201); A first reflector (3) is arranged at a position where the second inner cavity (201) is opposite to the first opening (202); A second reflector (4) is arranged at a position adjacent to the second inner cavity (201) and the second opening (203); The third reflector (5) is arranged at a position opposite to the second inner cavity (201) and the second opening (203), and is located between the first reflector (3) and the second reflector (4).

2. A dark box device for a vision screening instrument (6) according to claim 1, characterized in that: The inner box shell (2) comprises an upper box portion (204), an inclined connecting portion (205) and a lower box portion (206) which are connected in sequence from top to bottom, the inclined connecting portion (205) is arranged obliquely, and the top of the inclined connecting portion (205) is closer to the rear of the outer box shell (1) than the bottom thereof, the first opening (202) is arranged at the front of the upper box portion (204), the rear of the upper box portion (204) is connected to the rear of the lower box portion (206) through the inclined connecting portion (205), and the second opening (203) is arranged at the front of the lower box portion (206).

3. A dark box device for a vision screening instrument (6) according to claim 2, characterized in that: The first reflector (3) is fixedly mounted on the rear wall of the upper box portion (204), the first reflector (3) is tilted, and the bottom of the first reflector (3) is closer to the rear of the outer box shell (1) than the top thereof.

4. A dark box device for a vision screening instrument (6) according to claim 2, characterized in that: The second reflector (4) is fixedly mounted on the front wall of the lower box portion (206), the second reflector (4) is tilted, and the top of the second reflector (4) is closer to the front of the outer box shell (1) than its bottom.

5. A dark box device for a vision screening instrument (6) according to claim 2, characterized in that: The third reflector (5) is fixedly mounted on the rear wall of the lower box portion (206); the third reflector (5) is tilted, and the bottom of the third reflector (5) is closer to the rear of the outer box shell (1) than the top thereof.

6. A dark box device for a vision screening instrument (6) according to claim 1, characterized in that: The front part of the outer box shell (1) is also provided with a first cover body (104), the first cover body (104) covers the first installation cavity (103), and an operation port (105) is provided on the surface of the first cover body (104).

7. A dark box device for a vision screening instrument (6) according to claim 1, characterized in that: The front of the outer box shell (1) is also provided with a light shield (106), which surrounds the inspection port (102) and protrudes from the front surface of the outer box shell (1).

8. A dark box device for a vision screening instrument (6) according to claim 1, characterized in that: The front part of the outer box shell (1) is also provided with a second installation cavity (107) for fixedly installing the printer, and the second installation cavity (107) is located below the inspection port (102).

9. A dark box device for a vision screening instrument (6) according to claim 8, characterized in that: The front part of the outer box shell (1) is also provided with a second cover body (108), and the second cover body (108) covers the second installation cavity (107).

10. A dark box device for a vision screening instrument (6) according to claim 1, characterized in that: The outer box shell (1) comprises an outer box front shell (109) and an outer box rear shell (110), the outer box front shell (109) and the outer box rear shell (110) are detachably fixedly connected, and the inspection port (102) and the first installation cavity (103) are both arranged on the outer box front shell (109).