Suspension type liquid crystal visual chart

Abstract

The utility model discloses a suspension type liquid crystal visual chart which comprises a liquid crystal visual chart body, a U-shaped installation block and a flat plate supporting piece. Fixing holes are formed in the four corners of the flat plate supporting piece in a penetrating mode, butt joint opening grooves are fixedly formed in the front end face of the flat plate supporting piece, and butt joint opening convex grooves are fixedly formed in the two sides of the rear end of the U-shaped mounting block; limiting straight sliding grooves are formed in the upper side and the lower side of the middle of the rear end of the liquid crystal visual chart body, limiting straight sliding tables are arranged on the inner sides of the upper end and the lower end of the U-shaped mounting block, limiting open grooves are formed in the middles of the limiting straight sliding tables in a penetrating mode, and internal thread transmission holes are formed in the outer ends of the limiting open grooves in a penetrating mode; the inner wall of the internal thread transmission hole is in threaded connection with a pushing screw rod, and the inner side of the pushing screw rod is rotationally connected with a pushing plate through a rotating shaft. According to the liquid crystal visual chart, the liquid crystal visual chart body can be hung conveniently through the U-shaped installation block, and meanwhile the U-shaped installation block and the liquid crystal visual chart body can be separated and detached conveniently.

Description

Technical Field

[0001] This utility model relates to the field of vision chart technology, specifically a hanging liquid crystal vision chart. Background Technology

[0002] Eye charts are designed based on the principle of visual angle and are mainly used to test a person's visual acuity. Visual acuity refers to the eye's ability to distinguish small or distant objects and fine details. Eye charts assess this ability through a series of standardized test patterns (such as "E" letters of different sizes and orientations or Langevin rings).

[0003] The main functions of a visual acuity chart include: 1. Assessing visual acuity: A visual acuity chart provides a simple and quick understanding of a person's visual acuity, including both distance and near vision. 2. Assisting in the diagnosis of eye diseases: Visual acuity chart testing is part of routine ophthalmological examinations. Through the results, doctors can initially assess the risk of refractive errors (such as myopia, hyperopia, astigmatism, etc.), amblyopia, cataracts, and other eye diseases, providing a basis for further examination and treatment. 3. Monitoring changes in visual acuity: For patients diagnosed with eye diseases or those with visual abnormalities, regular visual acuity chart testing can monitor changes in visual acuity, assess treatment effectiveness, and assess disease progression. 4. Promoting vision health knowledge: The use of visual acuity charts is also an important way to popularize vision health knowledge among the public. Through visual acuity chart testing, people can pay more attention to their vision, understand the importance of protecting their eyesight, and thus take proactive and effective measures to prevent and treat eye diseases.

[0004] However, in practical use, with the rapid development of modern technology, people are using electronic screens more and more frequently in their daily lives, leading to increasingly prominent vision problems. In particular, refractive errors such as myopia and astigmatism are common among teenagers and adults. Traditional eye charts mostly use paper or fixed display methods, which are not only inconvenient to carry, but also inconvenient to hang and disassemble, resulting in poor flexibility of ordinary eye charts. Utility Model Content

[0005] The purpose of this utility model is to provide a hanging LCD eye chart to solve the problem mentioned in the background art: with the rapid development of modern technology, people's use of electronic screens in daily life is becoming more and more frequent, leading to increasingly prominent vision problems, especially refractive errors such as myopia and astigmatism, which are common among teenagers and adults. Traditional eye charts mostly use paper or fixed display methods, which are not only inconvenient to carry, but also inconvenient to hang and disassemble, resulting in poor flexibility of ordinary eye charts.

[0006] To achieve the above objectives, this utility model provides the following technical solution: including a liquid crystal vision chart body, a U-shaped mounting block, and a flat plate support sheet;

[0007] The flat plate support has fixing holes through its four corners. The front end of the flat plate support is fixedly installed with a mating opening groove. The rear ends of the U-shaped mounting block are fixedly installed with mating opening protrusions on both sides. The upper and lower sides of the middle rear end of the LCD vision chart body have limiting straight slide grooves. The inner sides of the upper and lower ends of the U-shaped mounting block have limiting straight slide platforms. The middle of the limiting straight slide platform has a limiting opening groove. The outer end of the limiting opening groove has an internal threaded transmission hole. The inner wall of the internal threaded transmission hole is threaded with a push screw. The inner side of the push screw is rotatably connected to a push plate through a rotating shaft. A support spring is fixedly installed on the outer side of the push plate. A compression plate is fixedly installed on the outer side of the support spring.

[0008] Preferably, there are four fixing holes, which are symmetrically distributed at the four corners of the flat plate support piece.

[0009] Preferably, there are two docking opening grooves, which are symmetrically distributed on both sides of the front end face of the flat plate support piece.

[0010] Preferably, the outer end of the mating opening protrusion fits into the inner wall of the mating opening groove.

[0011] Preferably, there are two limiting straight slide grooves, which are symmetrically distributed on the upper and lower sides of the middle rear end of the liquid crystal vision chart body, and the limiting straight slide platform is movably connected to the inner wall of the limiting straight slide groove.

[0012] Preferably, the internal threaded transmission hole extends outward to the outer end of the U-shaped mounting block, and the outer curved surface of the push screw is threaded with a fastening nut for locking and securing the push screw.

[0013] Preferably, there are several supporting springs, which are symmetrically distributed on the outer side of the push plate, and the outer end of the extrusion plate is movably connected to the inner wall of the limiting opening groove.

[0014] Preferably, the outer end of the extrusion plate is provided with anti-slip stripes, and the outer end of the extrusion plate is movably connected to the middle of the inner wall of the limiting straight slide groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. When the U-shaped mounting block is stably fixed in the middle of the rear end of the LCD vision chart body, the LCD vision chart body can be suspended on the wall by inserting the outer end of the mating opening protrusion into the inner wall of the mating opening groove. This facilitates the suspension of the LCD vision chart body. When it is necessary to suspend or disassemble the LCD vision chart body, the LCD vision chart body is lifted upwards. When the LCD vision chart body is lifted upwards, the outer end of the mating opening protrusion will move upwards out of the inner wall of the mating opening groove. When the outer end of the mating opening protrusion moves upwards out of the inner wall of the mating opening groove, the LCD vision chart body can be suspended or disassembled. This facilitates both the suspension and disassembly of the LCD vision chart body.

[0017] 2. This utility model also uses a reverse rotation to push the screw. When the screw is rotated in the opposite direction, it will sequentially drive the push plate to move in the opposite direction. When the push plate moves in the opposite direction, it will sequentially drive the extrusion plate to move in the opposite direction. When the extrusion plate moves in the opposite direction, it will release the extrusion plate from the middle of the inner wall of the limiting straight slide groove. When the extrusion plate is released from the middle of the inner wall of the limiting straight slide groove, the limiting straight slide table is pushed to move outward linearly out of the inner wall of the limiting straight slide groove. When the limiting straight slide table moves outward linearly out of the inner wall of the limiting straight slide groove, the U-shaped mounting block can be separated and disassembled from the LCD vision chart body. Thus, the U-shaped mounting block facilitates both the suspension of the LCD vision chart body and the separation and disassembly of the U-shaped mounting block from the LCD vision chart body. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a suspended liquid crystal vision chart according to this utility model. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the overall structure of a suspended liquid crystal vision chart according to this utility model. Figure 2 ;

[0020] Figure 3 This is a cross-sectional schematic diagram of the overall structure of a suspended liquid crystal vision chart according to the present invention;

[0021] Figure 4 This is a partial cross-sectional view of a suspended liquid crystal vision chart according to the present invention.

[0022] In the diagram: 1. LCD vision chart body; 2. U-shaped mounting block; 3. Flat plate support plate; 4. Fixing hole; 5. Docking opening groove; 6. Docking opening protrusion; 7. Limiting straight slide groove; 8. Limiting straight slide table; 9. Limiting opening slot; 10. Internal thread transmission hole; 11. Push screw; 12. Fastening nut; 13. Push plate; 14. Support spring; 15. Extrusion plate. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-4 This utility model provides a technical solution for a suspended liquid crystal vision chart: including a liquid crystal vision chart body 1, a U-shaped mounting block 2, and a flat plate support 3;

[0025] The flat plate support plate 3 has four through holes 4 at its four corners, which are symmetrically distributed at the four corners of the flat plate support plate 3. The flat plate support plate 3 is fixed to the wall by means of the through holes 4 and the pre-embedded bolts. The front end face of the flat plate support plate 3 has two mating opening grooves 5, which are symmetrically distributed on both sides of the front end face of the flat plate support plate 3. The rear end face of the U-shaped mounting block 2 has mating opening protrusions 6 on both sides, and the outer end of the mating opening protrusions 6 fits into the inner wall of the mating opening grooves 5. The U-shaped mounting block 2 is fixed to the front end of the flat plate support plate 3 by means of the mating opening protrusions 6 and the mating opening grooves 5.

[0026] Two limiting straight slide grooves 7 are provided on the upper and lower sides of the middle rear end of the LCD eye chart body 1, respectively, and are symmetrically distributed on the upper and lower sides of the middle rear end of the LCD eye chart body 1. Limiting straight slide stages 8 are provided on the inner sides of the upper and lower ends of the U-shaped mounting block 2, and are movably connected to the inner wall of the limiting straight slide grooves 7, allowing the U-shaped mounting block 2 to be linearly limited by the cooperation of the limiting straight slide grooves 7 and the limiting straight slide stages 8. A limiting opening groove 9 is provided through the middle of the limiting straight slide stage 8, and an internally threaded drive hole 10 is provided through the outer end of the limiting opening groove 9, extending outward to the outer end of the U-shaped mounting block 2. A push screw is threadedly connected to the inner wall of the internally threaded drive hole 10. 11, and the outer curved surface of the push screw 11 is threaded with a fastening nut 12 for locking and fastening the push screw 11. The inner side of the push screw 11 is rotatably connected to a push plate 13 via a rotating shaft. A support spring 14 is fixedly installed on the outer side of the push plate 13. There are several support springs 14, which are symmetrically distributed on the outer side of the push plate 13. A pressing plate 15 is fixedly installed on the outer side of the support spring 14. The outer end of the pressing plate 15 is movably connected to the inner wall of the limiting opening groove 9, so that the outer end of the pressing plate 15 can be linearly moved and limited by the inner wall of the limiting opening groove 9. The outer end of the pressing plate 15 is provided with anti-slip stripes. The outer end of the pressing plate 15 is movably connected to the middle of the inner wall of the limiting straight slide groove 7.

[0027] Working principle: In use, this utility model fixes the flat plate support plate 3 to the wall through the fixing hole 4 and the pre-embedded bolts. When the flat plate support plate 3 is fixed to the wall, the push screw 11 is rotated. When the push screw 11 rotates, it moves inward due to the force generated by the threaded connection with the inner wall of the internal thread transmission hole 10. When the push screw 11 moves inward, it drives the push plate 13 to move inward. When the push plate 13 moves inward, it drives the compression plate 15 to press and fit against the middle of the inner wall of the limiting straight slide groove 7 through the compression support spring 14. When the pressure plate 15 presses and adheres to the middle of the inner wall of the limiting straight slide groove 7, the limiting straight slide table 8 will remain fixed to the inner wall of the limiting straight slide groove 7. When the limiting straight slide table 8 remains fixed to the inner wall of the limiting straight slide groove 7, the U-shaped mounting block 2 will remain fixed to the middle of the rear end of the LCD vision chart body 1. At the same time, when the support spring 14 is compressed, the elastic potential energy generated by the compression deformation of the support spring 14 will always push the pressure plate 15 to press and adhere to the middle of the inner wall of the limiting straight slide groove 7, so that the U-shaped mounting block 2 remains stably fixed to the middle of the rear end of the LCD vision chart body 1.

[0028] When the U-shaped mounting block 2 is stably fixed in the middle of the rear end of the LCD eye chart body 1, the LCD eye chart body 1 can be suspended on the wall by inserting the outer end of the docking opening protrusion 6 into the inner wall of the docking opening groove 5. This facilitates the suspension of the LCD eye chart body 1. When it is necessary to suspend and disassemble the LCD eye chart body 1, the LCD eye chart body 1 is lifted upward. When the LCD eye chart body 1 is lifted upward, the outer end of the docking opening protrusion 6 will move upward out of the inner wall of the docking opening groove 5. When the outer end of the docking opening protrusion 6 moves upward out of the inner wall of the docking opening groove 5, the LCD eye chart body 1 can be suspended and disassembled. This facilitates both the suspension and disassembly of the LCD eye chart body 1.

[0029] Meanwhile, when it is necessary to separate and disassemble the U-shaped mounting block 2 from the LCD eye chart body 1, the push screw 11 is rotated in the opposite direction. When the push screw 11 is rotated in the opposite direction, it will drive the push plate 13 to move in the opposite direction in sequence. When the push plate 13 moves in the opposite direction, it will drive the squeezing plate 15 to move in the opposite direction in sequence. When the squeezing plate 15 moves in the opposite direction, it will release the squeezing and adhesion of the squeezing plate 15 to the middle of the inner wall of the limiting straight slide groove 7. When the squeezing and adhesion of the squeezing plate 15 to the middle of the inner wall of the limiting straight slide groove 7 is released, the limiting straight slide table 8 is pushed to move outward linearly out of the inner wall of the limiting straight slide groove 7. When the limiting straight slide table 8 moves outward linearly out of the inner wall of the limiting straight slide groove 7, the U-shaped mounting block 2 can be separated and disassembled from the LCD eye chart body 1. Thus, the U-shaped mounting block 2 facilitates the suspension of the LCD eye chart body 1 while facilitating the separation and disassembly of the U-shaped mounting block 2 from the LCD eye chart body 1.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A suspended liquid crystal optometer, characterized by: Liquid crystal visual acuity chart body (1), U-shaped mounting block (2) and flat plate support sheet (3) are included; The flat plate support sheet (3) is provided with a fixing hole (4) penetrating through the four corners, a butt joint opening groove (5) is fixedly installed on the front end face of the flat plate support sheet (3), and butt joint opening convex grooves (6) are fixedly installed on the both sides of the rear end of the U-shaped mounting block (2); a limiting straight sliding groove (7) is formed on the upper and lower sides of the middle part of the rear end of the liquid crystal visual acuity chart body (1), limiting straight sliding tables (8) are formed on the inner sides of the upper and lower ends of the U-shaped mounting block (2), a limiting opening groove (9) is formed in the middle part of the limiting straight sliding table (8), an internally threaded transmission hole (10) is formed in the outer end of the limiting opening groove (9), a push rod (11) is threadedly connected to the inner wall of the internally threaded transmission hole (10), a push plate (13) is rotatably connected to the inner side of the push rod (11) through a rotating shaft, a supporting spring (14) is fixedly installed on the outer side of the push plate (13), and an extrusion plate (15) is fixedly installed on the outer side of the supporting spring (14).

2. A suspended liquid crystal optometer according to claim 1, wherein: The number of the fixing holes (4) is four, which are symmetrically distributed at the four corners of the flat plate support sheet (3).

3. A suspended liquid crystal optometer according to claim 2, wherein: The number of the butt joint opening grooves (5) is two, which are symmetrically distributed on the both sides of the front end face of the flat plate support sheet (3).

4. A suspended liquid crystal optometer according to claim 3, wherein: The outer end of the butt joint opening convex groove (6) is matched with the inner wall of the butt joint opening groove (5).

5. A suspended liquid crystal optometric chart according to claim 4, wherein: The number of the limiting straight sliding grooves (7) is two, which are symmetrically distributed on the upper and lower sides of the middle part of the rear end of the liquid crystal visual acuity chart body (1), and the limiting straight sliding table (8) is movably connected to the inner wall of the limiting straight sliding groove (7).

6. A suspended liquid crystal optometric chart according to claim 5, wherein: The internally threaded transmission hole (10) penetrates outwardly to the outer end of the U-shaped mounting block (2), and the push rod (11) is threadedly connected with a fastening nut (12) for locking and fastening the push rod (11).

7. A suspended liquid crystal optometric chart according to claim 6, wherein: The number of the supporting springs (14) is several, which are symmetrically distributed on the outer side of the push plate (13) in sequence, and the extrusion plate (15) is movably connected to the inner wall of the limiting opening groove (9) on the outer end.

8. A suspended liquid crystal optometric chart according to claim 7, wherein: The outer end of the extrusion plate (15) is provided with anti-skid stripes, and the outer end of the extrusion plate (15) is movably connected to the middle part of the inner wall of the limiting straight sliding groove (7).

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