Combined liquid crystal visual chart

Abstract

The combined liquid crystal visual chart comprises a bottom plate, a hollow rod and a display screen, a screw hole is formed in the top end of the bottom plate, the bottom end of the hollow rod is arranged in the screw hole in a penetrating and inserting mode through threads, a movable rod is arranged in the hollow rod in a sliding mode, and a connecting mechanism convenient to connect with the display screen is arranged on one side of the movable rod. A limiting screw rod is arranged on one side of the hollow rod in a penetrating and inserting mode through threads. When the tool is used, the sleeve block is connected to the top end of the movable rod in a sleeved mode, the limiting rod is made to move into the limiting groove from the vertical groove position of the limiting groove, then the movable ring is rotated, the limiting rod is made to move into the transverse groove of the limiting groove, and therefore the sleeve block is fixed to the top end of the movable rod, and combination work is completed; and then the sleeve block is taken down to finish the disassembly, so that the assembly and the disassembly are convenient, and the secondary transfer and the replacement of parts are convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to visual acuity table equipment field, concretely is a combined liquid crystal visual acuity table. BACKGROUND

[0002] Liquid crystal visual acuity table is a kind of modern equipment for visual acuity determination, is widely used in academic, scientific research, teaching and lens fitting and other fields, especially in ophthalmic examination, glasses optometry and vision correction and plays an important role.

[0003] Part of liquid crystal visual acuity table is composed of display screen and support column, when using, the detection work of visual acuity is carried out by the stable support of display screen through support column, but support column and display screen are mostly inseparable fixed combination, so when the equipment is carried for the second time, support column increases the volume of the whole device, it is inconvenient to move and carry the device, at the same time, if display screen and support column are damaged, the whole cannot be discarded quickly and simply separated, so that part of resources is wasted, so there is an urgent need for a device to solve the above problems. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a combined liquid crystal visual acuity table to solve the problems in the above background.

[0005] In order to achieve the above object, the utility model provides the following technical scheme: a combined liquid crystal visual acuity chart, including bottom plate, hollow rod and display screen, the bottom plate top is equipped with screw hole, the hollow rod bottom is inserted in the screw hole through the thread, the hollow rod inside is equipped with the movable rod of sliding, the movable rod one side is equipped with the connecting mechanism of convenient connection display screen, the hollow rod one side is inserted in the limiting screw rod through the thread, when using, along the hollow rod moves the movable rod, can adjust the height of display screen, after adjusting to the appropriate position, at the moment, rotate the limiting screw rod, so that the limiting screw rod extrude movable rod outside, thereby through extruding fixed movable rod position, the fixed use of display screen is convenient, the connecting mechanism includes sleeve block, movable frame, arc slide groove, movable ring, limit groove, limit rod, first fixed shaft, extrusion ring and second fixed shaft, the sleeve block is movably sleeved in the movable rod top position, the first fixed shaft is fixedly inserted in the sleeve block, the movable frame is movably sleeved in the first fixed shaft outside, the arc slide groove is equipped in the movable frame, the second fixed shaft is fixedly inserted in the sleeve block, the extrusion ring is sleeved in the second fixed shaft one side through the thread, the limit rod is fixed in the sleeve block outside, the movable ring is movably sleeved in the movable rod outside, the movable ring and the movable ring outside are provided with the friction of preventing movable ring rotation between the movable rod outside, the limit groove is equipped in the movable ring outside, the display screen is fixed in the movable frame one side, when using, the sleeve block is sleeved in the movable rod top position, and the limit rod is moved from the limit groove vertical groove position to the limit groove inside, then rotate the movable ring, so that the limit rod moves to the limit groove horizontal groove inside, so that the sleeve block is fixed in the movable rod top, completes the combination work, when disassembling, reverse rotation movable ring, then take down the sleeve block can complete disassembly, convenient assembly is convenient disassembly work, so convenient secondary transportation and the replacement of parts, and when using, the movable frame rotates around the first fixed shaft, so that the second fixed shaft moves in the arc slide groove, so it can adjust the inclination angle of display screen, convenient device uses, after adjusting, rotate the extrusion ring, until the extrusion ring extrudes the movable frame outside, the movable frame position is fixed through the friction, guarantee the fixed use of display screen.

[0006] Preferably, the limit screw rod one side is fixedly provided with the rotating block of convenient rotating limit screw rod.

[0007] Preferably, the arc slide groove is provided with two, and is symmetrically equipped in the both sides position of movable frame.

[0008] Preferably, the second fixed shaft both sides extend to the sleeve block outside, and are movably inserted in the arc slide groove inside.

[0009] Preferably, the limit rod is provided with two, and is symmetrically fixed in the both sides position of sleeve block.

[0010] Preferably, the limit groove is L-shaped, and is symmetrically equipped in the both sides position of movable ring.

[0011] Compared with the prior art, the utility model has the advantages of:

[0012] 1、The utility model discloses a sleeve block is connected in the movable rod top position in use, and make the limit rod from the limit groove vertical groove position moves to the limit groove inside, then rotates the movable ring, make the limit rod move to the limit groove inside transversely, so make sleeve block fixed in the movable rod top, complete the combination work, when disassembling, reverse rotation movable ring, then take down sleeve block can complete disassembly, convenient assembly and convenient disassembly work, so convenient secondary transport and the replacement of parts.

[0013] 2、The utility model discloses in use movable frame rotates around first fixed axle, make second fixed axle move in arc -shaped sliding slot inside, so can adjust the inclination angle of display screen, convenient device uses, after adjusting, rotate extrusion ring, until extrusion ring extrudes movable frame outside, pass through the friction force fixed movable frame position, guarantee the fixed use of display screen. DRAWINGS

[0014] Figure 1 It is a combined liquid crystal visual acuity table overall structure schematic view of the utility model;

[0015] Figure 2 It is a combined liquid crystal visual acuity table side view of the utility model;

[0016] Figure 3 It is a combined liquid crystal visual acuity table section view of the utility model;

[0017] Figure 4 It is a combined liquid crystal visual acuity table A amplification schematic view of the utility model;

[0018] Figure 5 It is a combined liquid crystal visual acuity table B amplification schematic view of the utility model.

[0019] In the drawing: 1, bottom plate;2, hollow rod;3, screw hole;4, movable rod;5, limit screw;6, sleeve block;7, movable frame;8, display screen;9, second fixed axle;10, limit rod;11, movable ring;12, limit groove;13, first fixed axle;14, extrusion ring;15, arc -shaped sliding slot. DETAILED DESCRIPTION

[0020] 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 labor fall within the scope of protection of the utility model.

[0021] Referring to Figures 1-5 The utility model provides a combined liquid crystal visual acuity chart, including bottom plate 1, hollow rod 2 and display screen 8, bottom plate 1 top end is equipped with screw hole 3, the bottom end of hollow rod 2 is inserted in screw hole 3 inside through thread, the inside sliding of hollow rod 2 has movable rod 4, movable rod 4 one side has the connecting mechanism of convenient connection display screen 8, one side of hollow rod 2 passes through the insertion of thread and is limited screw rod 5, and one side of limited screw rod 5 is welded and is fixed with the rotation block of convenient rotation limited screw rod 5, when using, along hollow rod 2 and move movable rod 4, can adjust the height of display screen 8, after adjusting to the appropriate position, now rotate limited screw rod 5, so that limited screw rod 5 extrudes movable rod 4 outside, thereby extruding and fixing movable rod 4 position, the fixed use of display screen 8 is convenient, and the connecting mechanism includes sleeve block 6, movable frame 7, arc slide groove 15, movable ring 11, limit groove 12, limit rod 10, first fixed shaft 13, extrusion ring 14 and second fixed shaft 9, sleeve block 6 movable sleeve joint is at movable rod 4 top end position, first fixed shaft 13 fixedly inserts in the inside of sleeve block 6, movable frame 7 movable sleeve joint is at first fixed shaft 13 outside, arc slide groove 15 is equipped with in movable frame 7, and arc slide groove 15 has two, and symmetrically sets up at movable frame 7 both sides position, second fixed shaft 9 fixedly inserts in the inside of sleeve block 6, and second fixed shaft 9 both sides extend to the outside of sleeve block 6, and are movable and insert in the inside of arc slide groove 15, and extrusion ring 14 is through the thread sleeve joint at second fixed shaft 9 one side, limit rod 10 is welded and fixed at the outside of sleeve block 6, and limit rod 10 has two, and symmetrically fixed at the both sides position of sleeve block 6, movable ring 11 movable sleeve joint is at movable rod 4 outside, and there is the friction of preventing movable ring 11 rotation between movable ring 11 and movable rod 4 outside, limit groove 12 is equipped with at movable ring 11 outside, and limit groove 12 is L-shaped, and symmetrically sets up at movable ring 11 both sides position, and display screen 8 is fixed through bolt at movable frame 7 one side, when using, sleeve block 6 is sleeve joint at movable rod 4 top end position, and make limit rod 10 move from the vertical slot position of limit groove 12 to the inside of limit groove 12, then rotate movable ring 11, make limit rod 10 move to the inside of limit groove 12 horizontal slot, so that sleeve block 6 is fixed at movable rod 4 top end, complete combination work, when disassembling, reverse rotation movable ring 11, then take down sleeve block 6 can complete disassembly, convenient assembly is convenient disassembly work, so convenient secondary transport and component replacement, and when using, movable frame 7 rotates around first fixed shaft 13, so that second fixed shaft 9 moves in the inside of arc slide groove 15, so can adjust the inclination angle of display screen 8, convenient device uses, after adjusting, rotate extrusion ring 14, until extrusion ring 14 extrudes movable frame 7 outside, through the friction and fixes movable frame 7 position, guarantee the fixed use of display screen 8.

[0022] Working principle: when using, the sleeve block 6 is sleeved on the top end of the movable rod 4, and the limiting rod 10 is moved from the vertical slot of the limiting slot 12 to the inside of the limiting slot 12, then the movable ring 11 is rotated, so that the limiting rod 10 is moved to the inside of the transverse slot of the limiting slot 12, so that the sleeve block 6 is fixed on the top end of the movable rod 4, the assembly work is completed, when disassembling, the movable ring 11 is reversely rotated, then the sleeve block 6 is taken off, the disassembly is completed, the assembly and disassembly work is convenient, so that the secondary transportation and part replacement are convenient, and when using, the movable frame 7 is rotated around the first fixed shaft 13, so that the second fixed shaft 9 is moved in the arc-shaped sliding slot 15, so that the inclination angle of the display screen 8 can be adjusted, the device is convenient to use, after the adjustment is completed, the extrusion ring 14 is rotated until the extrusion ring 14 extrudes the outside of the movable frame 7, the position of the movable frame 7 is fixed by the friction force, and the fixed use of the display screen 8 is ensured.

[0023] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations 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.

[0024] Although the embodiments of the present application have been shown and described, it is understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A combined liquid crystal optotype, comprising a base plate (1), a hollow rod (2) and a display screen (8), characterized in that: The bottom plate (1) top end is provided with screw hole (3), the hollow rod (2) bottom end is provided in screw hole (3) inside through thread, the hollow rod (2) inside is provided with movable rod (4) sliding, the movable rod (4) one side is provided with the connecting mechanism of convenient connection display screen (8), the hollow rod (2) one side is provided with limiting screw rod (5) through thread, the connecting mechanism includes sleeve block (6), movable frame (7), arc sliding slot (15), movable ring (11), limiting groove (12), limiting rod (10), first fixed shaft (13), extrusion ring (14) and second fixed shaft (9), the sleeve block (6) is movably sleeved in the top end position of movable rod (4), the first fixed shaft (13) is fixedly inserted into the inside of sleeve block (6), the movable frame (7) is movably sleeved in the outside of first fixed shaft (13), the arc sliding slot (15) is set up in movable frame (7), the second fixed shaft (9) is fixedly inserted into the inside of sleeve block (6), the extrusion ring (14) is sleeved on the one side of second fixed shaft (9) through thread, the limiting rod (10) is fixed on the outside of sleeve block (6), the movable ring (11) is movably sleeved in the outside of movable rod (4), the movable ring (11) and the outside of movable rod (4) between the friction that the rotation of movable ring (11) is provided with is impeded, the limiting groove (12) is set up in the outside of movable ring (11), the display screen (8) is fixed on the one side of movable frame (7).

2. The combination liquid crystal optometric chart according to claim 1, wherein: The limiting screw rod (5) one side is fixedly provided with the rotating block of convenient rotation limiting screw rod (5).

3. A combined liquid crystal optometric chart according to claim 2, wherein: The arc sliding slot (15) is provided with two, and is symmetrically set up in the both sides of movable frame (7).

4. A combination liquid crystal optometric chart according to claim 3, wherein: The second fixed shaft (9) both sides extend to the outside of sleeve block (6), and are movably inserted into the inside of arc sliding slot (15).

5. A combined liquid crystal optometric chart according to claim 4, wherein: The limiting rod (10) is provided with two, and is symmetrically fixed in the both sides of sleeve block (6).

6. A combined liquid crystal optometric chart according to claim 5, wherein: The limiting groove (12) is L-shaped, and is symmetrically set up in the both sides of movable ring (11).

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