CN219699895U - Visual inspection test chart - Google Patents

Abstract

The utility model relates to the technical field of vision testing, and particularly discloses an eye chart, which comprises an eye chart, wherein a lifting sleeve plate is arranged on the rear surface of the eye chart, a lifting frame is arranged in the lifting sleeve plate, clamping teeth are arranged on two sides of the lifting frame, a limiting sliding groove is arranged on the rear surface of the lifting frame, a limiting sliding block is arranged on the outer side of the limiting sliding groove and positioned on the inner side wall of the lifting sleeve plate, a clamping claw is arranged in the lifting sleeve plate and positioned on the outer side of the limiting sliding groove, and an elastic rotating shaft is connected between the clamping claw and the lifting sleeve plate. The internal acting force towards the lifting sleeve plate is applied to the clamping claw, the clamping claw rotates under the action of the elastic rotating shaft, the clamping action of the clamping claw and the clamping teeth is disconnected, and under the sliding limiting action of the limiting sliding block and the limiting sliding groove, the lifting frame is controlled to conduct guiding adjustment in the lifting sleeve plate, so that the visual chart is convenient to control for people with different heights to observe.

Description

Visual inspection test chart

Technical Field

The utility model relates to the technical field of vision testing, in particular to an eye test chart.

Background

The visual acuity chart is used for measuring visual acuity, the visual acuity chart used for medical detection mainly detects central vision, namely central concave visual acuity of a macular area of retina, so that the preliminary condition of visual function can be simply and rapidly known, and the Chinese patent net discloses an authorized notice number (CN 209421905U) of the visual acuity chart for vision detection.

However, the vision board in the above application has a fixed height and position, which is inconvenient for users with different heights.

Disclosure of Invention

In view of the shortcomings of the prior art, the present utility model provides an eye chart that solves the problems noted in the background above.

The utility model provides the following technical scheme: the utility model provides an eye chart, includes the eye chart, the back surface mounting of eye chart has the lift sleeve board, the inside of lift sleeve board is provided with the crane, the joint tooth has been seted up to the both sides of crane, spacing spout has been seted up to the back surface of crane, the outside of spacing spout is located the inside wall of lift sleeve board is installed spacing slider, the outside of spacing spout is located the inside of lift sleeve board is provided with the joint claw, the joint claw with be connected with elastic rotating shaft between the lift sleeve board.

As still further aspects of the utility model: the lower extreme of crane is installed the installation base, the storage tank has been seted up to the lower surface of installation base, the inside of storage tank is provided with the regulating roller, regulating roller with be connected with the pivot between the installation base.

As still further aspects of the utility model: the visual acuity test chart is characterized in that an LED lamp tube is arranged in the visual acuity test chart, an acrylic visual acuity board is arranged in the visual acuity test chart in front of the LED lamp tube, and a replacement visual acuity board is arranged in the visual acuity test chart in back of the LED lamp tube.

As still further aspects of the utility model: the clamping claw is clamped with the clamping tooth, and the clamping tooth is movably connected with the lifting sleeve plate through the elastic rotating shaft.

As still further aspects of the utility model: the lifting frame is in sliding connection with the limiting sliding block through the limiting sliding groove.

As still further aspects of the utility model: the adjusting roller is rotatably connected with the mounting base through the rotating shaft.

As still further aspects of the utility model: the front surface of the visual acuity chart is provided with a switch, and the switch is electrically connected with the LED lamp tube.

As still further aspects of the utility model: the acrylic vision board and the replacement vision board are movably connected with the vision chart.

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

the internal acting force towards the lifting sleeve plate is applied to the clamping claw, the clamping claw rotates under the action of the elastic rotating shaft, the clamping action of the clamping claw and the clamping teeth is disconnected, and under the sliding limiting action of the limiting sliding block and the limiting sliding groove, the lifting frame is controlled to conduct guiding adjustment in the lifting sleeve plate, so that the visual chart is convenient to control for people with different heights to observe.

The visual acuity chart is integrally lifted upwards, the adjusting roller wheel inside the storage groove is outwards ejected under the action of the rotating shaft, the visual acuity chart can be integrally guided to move through the adjusting roller wheel, and when the visual acuity chart is installed at a proper position, the adjusting roller wheel is integrally stored in the storage groove, so that the visual acuity chart is convenient to fix.

Drawings

FIG. 1 is a schematic diagram of an eye chart;

FIG. 2 is a schematic view of the internal structure of a lifting sleeve plate in an eye chart;

fig. 3 is a schematic view of the bottom structure of an eye chart in an eye chart.

In the figure: 1. an eye chart; 2. acrylic vision board; 3. an LED lamp tube; 4. a switch; 5. a lifting frame; 6. a mounting base; 7. changing the vision board; 101. lifting the sleeve plate; 102. a clamping claw; 103. an elastic rotating shaft; 104. a limit sliding block; 501. limiting sliding grooves; 502. clamping teeth; 601. a storage groove; 602. adjusting the roller; 603. a rotating shaft.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-3, this embodiment provides an eye chart, including eye chart 1, the back surface mounting of eye chart 1 has lift sleeve board 101, the inside of lift sleeve board 101 is provided with crane 5, joint tooth 502 has been seted up to the both sides of crane 5, spacing spout 501 has been seted up to the back surface of crane 5, spacing slider 104 is installed to the inside wall that the outside of spacing spout 501 is located lift sleeve board 101, crane 5 passes through spacing spout 501 and spacing slider 104 sliding connection, the outside of spacing spout 501 is located the inside of lift sleeve board 101 and is provided with joint claw 102, joint claw 102 and joint tooth 502 joint are connected with elastic rotating shaft 103 between joint claw 102 and the lift sleeve board 101, joint tooth 502 is through elastic rotating shaft 103 and lift sleeve board 101 swing joint.

As shown in fig. 2-3, in this embodiment, a mounting base 6 is mounted at the lower end of the lifting frame 5, a storage groove 601 is formed in the lower surface of the mounting base 6, a regulating roller 602 is disposed in the storage groove 601, a rotating shaft 603 is connected between the regulating roller 602 and the mounting base 6, the regulating roller 602 is rotationally connected with the mounting base 6 through the rotating shaft 603, an LED lamp tube 3 is mounted in the eye chart 1, a switch 4 is mounted on the front surface of the eye chart 1, the switch 4 is electrically connected with the LED lamp tube 3, an acrylic vision board 2 is mounted in the front of the LED lamp tube 3 in the eye chart 1, a replacement vision board 7 is mounted in the rear of the LED lamp tube 3 in the eye chart 1, and both the acrylic vision board 2 and the replacement vision board 7 are movably connected with the eye chart 1.

The working principle of the utility model is as follows: when the visual testing machine is used, the acrylic visual board 2 and the replacement visual board 7 are used for carrying out position interchange to select boards with different patterns, the LED lamp tube 3 is controlled to illuminate through the switch 4, so that the acrylic visual board 2 or the patterns on the replacement visual board 7 can be conveniently observed, when the installation height of the visual testing machine 1 is required to be controlled, the clamping claw 102 is utilized to apply internal acting force towards the lifting sleeve board 101, the clamping claw 102 rotates under the action of the elastic rotating shaft 103, the clamping action of the clamping claw 102 and the clamping teeth 502 is disconnected, the lifting frame 5 is controlled to conduct guiding adjustment position in the lifting sleeve board 101 under the sliding limiting action of the limiting sliding block 104 and the limiting sliding groove 501, when the proper position is adjusted, the acting force of the clamping claw 102 is disconnected, when the integral visual testing machine 1 is required to be controlled to conduct position adjustment, the integral visual testing machine can be lifted upwards through the adjusting roller 602 in the storage groove 601 under the action of the rotating shaft 603, the integral visual testing machine 1 can be enabled to conduct guiding movement through the adjusting roller 602, and the integral visual testing machine is installed to the proper position to the outer side 602.

It is noted that relational terms 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 actual such relationship or order between such entities or actions, and further, that the terms "comprise," "include," 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 may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model 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 therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The utility model provides an eye chart, includes eye chart (1), its characterized in that, back surface mounting of eye chart (1) has lift sleeve board (101), the inside of lift sleeve board (101) is provided with crane (5), joint tooth (502) have been seted up to the both sides of crane (5), spacing spout (501) have been seted up to the back surface of crane (5), the outside of spacing spout (501) is located spacing slider (104) are installed to the inside wall of lift sleeve board (101), the outside of spacing spout (501) is located the inside of lift sleeve board (101) is provided with joint claw (102), joint claw (102) with be connected with elastic rotating shaft (103) between lift sleeve board (101).

2. An eye chart according to claim 1, characterized in that the lower end of the lifting frame (5) is provided with a mounting base (6), the lower surface of the mounting base (6) is provided with a containing groove (601), the inside of the containing groove (601) is provided with an adjusting roller (602), and a rotating shaft (603) is connected between the adjusting roller (602) and the mounting base (6).

3. An eye chart according to claim 1, characterized in that the inside of the eye chart (1) is provided with an LED lamp tube (3), the front of the LED lamp tube (3) is positioned in the inside of the eye chart (1) and is provided with an acrylic vision board (2), and the rear of the LED lamp tube (3) is positioned in the inside of the eye chart (1) and is provided with a replacement vision board (7).

4. An eye chart according to claim 1, wherein the clamping claw (102) is clamped with the clamping tooth (502), and the clamping tooth (502) is movably connected with the lifting sleeve plate (101) through the elastic rotating shaft (103).

5. An eye chart according to claim 1, characterized in that the lifting frame (5) is slidingly connected with the limit slider (104) through the limit chute (501).

6. An eye chart according to claim 2, characterized in that the adjustment roller (602) is rotatably connected to the mounting base (6) via the rotation shaft (603).

7. An eye chart according to claim 3, characterized in that the front surface of the eye chart (1) is provided with a switch (4), the switch (4) being electrically connected to the LED tube (3).

8. An eye chart according to claim 3, characterized in that the acrylic vision plate (2) and the replacement vision plate (7) are both movably connected with the eye chart (1).