Liquid crystal visual chart with rotatable screen

Abstract

The liquid crystal visual chart with the rotatable screen comprises a balance weight bottom plate, a plurality of installation frames are fixedly connected to the corners of the top face of the balance weight bottom plate, a plurality of limiting holes are formed in the corners of the side faces of the installation frames, installation rods are hinged to the inner sides of the installation frames, and limiting assemblies are arranged on the left side face and the right side face of each installation rod. Universal wheels are fixedly connected to the ends, away from the mounting frame, of the bottom faces of the mounting rods, a mounting box is fixedly connected to the middle of the top face of the balance weight bottom plate, a rotating assembly is arranged in the mounting box and connected with a connecting rod, and a rotating support is fixedly connected to the top end of the front side face of the connecting rod; the front side face of the rotating support is fixedly connected with a liquid crystal visual chart. When the device is used, the whole device is convenient to move, the mounting rod is upwards rotated to be in a vertical state, the limiting assembly limits the mounting rod, the counterweight bottom plate makes contact with the ground, the contact area is increased, and stability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid crystal visual chart technical field, concretely is a screen rotatable liquid crystal visual chart. BACKGROUND

[0002] Liquid crystal visual chart is also called automatic electronic visual examination instrument, and the arrangement of the visual target accords with the new national visual standard. The liquid crystal visual chart is suitable for general physical examination of children, adolescents or adults, screening of visual impairment, clinical diagnosis and treatment of ophthalmology and optometry, visual determination in aspects of academic research, teaching and lens fitting, etc.

[0003] The existing liquid crystal visual chart is provided with universal wheels at the bottom for convenient movement, but the contact area of the universal wheels with the ground is small, and the liquid crystal visual chart is easily slid or skidded when parked under external force, which is inconvenient to use. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a screen rotatable liquid crystal visual chart to solve the problems in the above background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a screen rotatable liquid crystal visual chart, comprising a counterweight bottom plate, a plurality of mounting racks are fixedly connected at the top corner of the counterweight bottom plate, a plurality of limiting holes are formed at the side corner of the mounting rack, a mounting rod is hingedly connected to the inner side of the mounting rack, a limiting assembly is arranged on the left and right sides of the mounting rod, a universal wheel is fixedly connected to the end of the mounting rod away from the mounting rack, an installation box is fixedly connected to the middle of the top surface of the counterweight bottom plate, a rotating assembly is arranged in the installation box, the rotating assembly is connected with a connecting rod, a rotating support is fixedly connected to the top end of the front side of the connecting rod, and a liquid crystal visual chart is fixedly connected to the front side of the rotating support.

[0006] Preferably, the limiting assembly comprises a mounting groove, the mounting groove is formed in the middle of the left and right sides of the mounting rod, a spring is fixedly connected to one side of the inside of the mounting groove, a limiting block is fixedly connected to the other end of the spring, the limiting block is located in the mounting groove near the one end of the spring, and the limiting block is located in the limiting hole away from the other end of the spring.

[0007] Preferably, the rotating assembly comprises a motor, the motor is fixedly connected to the right side wall of the installation box, a first gear is fixedly connected to the output shaft of the motor, a second gear is meshingly connected to the first gear, the second gear is fixedly connected to the upper end of a rotating rod, the rotating rod is rotatably connected to the middle of the inner surface of the installation box at the bottom end, the rotating rod penetrates through the top wall of the installation box at the top end, and the connecting rod is fixedly connected to the top surface of the rotating rod.

[0008] Preferably, the shape of the counterweight bottom plate is an I shape.

[0009] Preferably, one end of the bottom surface of the rotating support is fixedly connected with a control switch, and the control switch is electrically connected with the motor.

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] The utility model discloses when using, through the rolling of universal wheel, make whole convenient removal, after moving whole to the specified use position, press the limiting block to the installation slot, rotate the installation rod to the vertical state to the top, under the action of spring, the limiting block pops out to the limiting hole in the top, thereby to the installation rod is limited, the counterweight bottom plate is contacted with ground, increased the contact area, improved stability. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the first visual angle structural schematic drawing of the utility model;

[0013] Figure 2 It is the second visual angle structural schematic drawing of the utility model;

[0014] Figure 3 It is the side sectional view structural schematic drawing of the utility model;

[0015] Figure 4 It is the limiting assembly structural schematic drawing of the utility model.

[0016] In the drawing: 1, counterweight bottom plate;2, mounting frame;3, limiting hole;4, installation rod;5, limiting assembly;51, installation slot;52, spring;53, limiting block;6, universal wheel;7, installation box;8, rotating assembly;81, motor;82, first gear;83, second gear;84, rotating rod;9, connecting rod;10, rotating support;11, liquid crystal visual chart;12, control switch. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the utility model.

[0018] Please refer to Figures 1-4The utility model provides a technical scheme: a screen rotatable liquid crystal optometric chart, including counterweight bottom plate 1, a plurality of mounting bracket 2 are installed in the corner of counterweight bottom plate 1 top surface through bolt, a plurality of limiting hole 3 are set up in the corner of mounting bracket 2 side, mounting rod 4 is hinged in the inside of mounting bracket 2, limiting assembly 5 is installed in the left and right side of mounting rod 4, universal wheel 6 is installed in the bottom surface of mounting rod 4 away from mounting bracket 2 one end through bolt, installation box 7 is installed in the top surface middle part of counterweight bottom plate 1 through bolt, rotating assembly 8 is installed in the inside of installation box 7, rotary support 10 is installed in the front side top end of connecting rod 9 through bolt, liquid crystal optometric chart 11 is installed in the front side of rotary support 10 through bolt.

[0019] Limiting assembly 5 includes installation slot 51, installation slot 51 is set up in the middle part of the left and right side of mounting rod 4, spring 52 is welded in one side in the inside of installation slot 51, limiting block 53 is welded in the other end of spring 52, limiting block 53 is located in installation slot 51 close to one end of spring 52, limiting block 53 is located in limiting hole 3 away from one end of spring 52.

[0020] Rotating assembly 8 includes motor 81, motor 81 is installed in the right side wall of installation box 7 through bolt, first gear 82 is installed in the output shaft of motor 81 through key, second gear 83 is connected with first gear 82 meshing, second gear 83 is installed on the upper end of rotating rod 84 through key, rotating rod 84 bottom end is installed in the middle part of the inner surface of installation box 7 through bearing, rotating rod 84 top end penetrates the top wall of installation box 7, connecting rod 9 is installed in the top surface of rotating rod 84 through bolt.

[0021] Counterweight bottom plate 1 is the shape of I shape.

[0022] Control switch 12 is installed in the top end of the rear side of connecting rod 9 through bolt, and control switch 12 is electrically connected with motor 81.

[0023] Working principle: when the utility model is used, the rolling of universal wheel 6 makes the whole convenient to move, after moving the whole to the specified use position, press limiting block 53 into installation slot 51, rotate mounting rod 4 upwards to vertical state, under the action of spring 52, limiting block 53 pops up into the limiting hole 3 in the upper, thereby limiting mounting rod 4, counterweight bottom plate 1 contacts with the ground, increases the contact area, improves the stability, starts motor 81 through control switch 12, and motor 81 rotates rotating rod 84 through first gear 82 and second gear 83, so that connecting rod 10 drives liquid crystal optometric chart 11 to rotate, so that the orientation of liquid crystal optometric chart 11 can be adjusted, which is convenient to use, and rotary support 10 makes liquid crystal optometric chart 11 can rotate in the vertical direction, the utility model has the advantages of convenient use and good use effect.

[0024] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0025] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A liquid crystal eye chart with a rotatable screen, comprising a counterweight base plate (1), characterized in that: The top corners of the counterweight base plate (1) are fixedly connected to a plurality of mounting brackets (2), the side corners of the mounting bracket (2) are provided with a plurality of limiting holes (3), the inner side of the mounting bracket (2) is hinged with a mounting rod (4), the left and right sides of the mounting rod (4) are provided with limiting components (5), the bottom of the mounting rod (4) away from the mounting bracket (2) is fixedly connected to a universal wheel (6), the middle of the top of the counterweight base plate (1) is fixedly connected to a mounting box (7), the interior of the mounting box (7) is provided with a rotating component (8), the rotating component (8) is connected to a connecting rod (9), the top of the front side of the connecting rod (9) is fixedly connected to a rotating bracket (10), and the front side of the rotating bracket (10) is fixedly connected to a liquid crystal eye chart (11).

2. The liquid crystal eye chart with a rotatable screen according to claim 1, characterized in that: The limiting assembly (5) includes a mounting groove (51), the mounting groove (51) being opened in the middle of the left and right sides of the mounting rod (4), a spring (52) being fixedly connected to one side of the mounting groove (51), and a limiting block (53) being fixedly connected to the other end of the spring (52), the limiting block (53) being located in the mounting groove (51) at one end close to the spring (52), and the limiting block (53) being located in the limiting hole (3) at one end away from the spring (52).

3. The liquid crystal eye chart with a rotatable screen according to claim 1, characterized in that: The rotating assembly (8) includes a motor (81), the motor (81) is fixedly connected to the right side wall of the installation box (7), the output shaft of the motor (81) is fixedly connected to a first gear (82), the first gear (82) is meshedly connected to a second gear (83), the second gear (83) is fixedly connected to the upper end of a rotating rod (84), the bottom end of the rotating rod (84) is rotatably connected to the middle of the inner surface of the installation box (7), the top end of the rotating rod (84) passes through the top wall of the installation box (7), and the connecting rod (9) is fixedly connected to the top surface of the rotating rod (84).

4. The liquid crystal eye chart with a rotatable screen according to claim 1, characterized in that: The counterweight base plate (1) is in the shape of an I-beam.

5. The liquid crystal eye chart with a rotatable screen according to claim 1, characterized in that: A control switch (12) is fixedly connected to the top end of the rear side of the connecting rod (9), and the control switch (12) is electrically connected to the motor (81).

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