CN220938026U - Vision degree tester with reset function - Google Patents

Abstract

A vision degree tester with a reset function. The vision degree tester mainly solves the problems that the prior vision degree tester has no reset structure and is inconvenient for the next patient to use after the use is completed. The method is characterized in that: the test board comprises a shell, wherein a rack (41) running along a straight line is arranged in the shell, a transmission gear (22) meshed with the rack is arranged on the outer wall of the test board, an elastic piece (5) is arranged in the shell and used for pushing the rack by force application, and therefore the test board is in an initial position. The vision degree tester with the reset function provided by the utility model can return to the original position after the use is finished, so that the vision degree tester is convenient for the next user to use.

Description

Vision degree tester with reset function

Technical Field

The utility model relates to the field of simple vision testing tools, in particular to a vision degree tester with a reset function.

Background

Glasses have become an indispensable vision aid in people's daily life, especially middle-aged and elderly people, and presbyopia requires wearing presbyopic glasses. This is a phenomenon of functional aging of the human body, and the degree of aging increases with age. Many middle-aged and elderly people cannot determine the correct degree of presbyopia, for example, wearing presbyopic glasses with lower actual degrees than the middle-aged and elderly people, but can take books and newspapers far away and see the handwriting on the books and newspapers clearly.

For this reason, chinese patent publication No. CN209136573U discloses a presbyopic testing device, which however has no reset structure, and is inconvenient for the next patient to use after the use is completed.

Disclosure of utility model

In order to overcome the defects of the background technology, the utility model provides the vision degree tester with the reset function, which mainly solves the problem that the prior vision degree tester has no reset structure and is inconvenient for the next patient to use after the use is completed.

The technical scheme adopted by the utility model is as follows:

The utility model provides a eyesight degree tester with reset function, includes the casing, be equipped with rotatable test board that sets up on the casing, be equipped with the different lens of a plurality of degrees on the test board, be equipped with the window on the casing, each lens is in the test board rotates the time round appearance on the window, be equipped with along the rack of rectilinear motion in the casing, the test board outer wall be equipped with rack toothing's driving tooth, be equipped with the elastic component in the casing, thereby the elastic component is used for the application of force to promote the rack makes the test board is in initial position.

The elastic piece is a spring.

A support is arranged in the shell, one end of the spring is propped against the support, and the other end of the spring is propped against the rack.

The rack outer wall is provided with a containing groove for one end of the spring to extend into.

Two guide edges are arranged in the shell, and a sliding groove for the movement of the rack is formed between the two guide edges.

The support is provided with a guide rod, and the guide rod part extends into the accommodating groove.

The spring is sleeved outside the guide rod, a flange is arranged on the guide rod, one end of the spring is propped against the side wall of the flange, and the other end of the spring is propped against the inner wall of the accommodating groove.

The beneficial effects of the utility model are as follows: the vision degree tester with the reset function provided by the utility model can return to the original position after the use is finished, so that the vision degree tester is convenient for the next user to use.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present utility model.

Fig. 2 is an internal perspective view of an embodiment of the present utility model.

FIG. 3 is a schematic partial cross-sectional view of one embodiment of the present utility model.

Fig. 4 is a schematic perspective view of a test board according to an embodiment of the utility model.

Detailed Description

The utility model is further described below with reference to the accompanying drawings: as shown in the figure, the vision degree tester with reset function comprises a shell 1, a rotatable test board 2 is arranged on the shell, a plurality of lenses 21 with different degrees are arranged on the test board, a window 3 is arranged on the shell, each lens is arranged on the window when the test board rotates, a rack 41 running along a straight line is arranged in the shell, a transmission tooth 22 meshed with the rack is arranged on the outer wall of the test board, an elastic piece 5 is arranged in the shell, and the elastic piece is used for forcing and pushing the rack so as to enable the test board to be in an initial position. Similar to CN209136573U, the test board is partly exposed and is used for manual pushing and rotating, the lens can be an ageing lens or a myopia lens, the lens can appear in the window in turn when rotating, the eye can be observed from the window, the eye chart can be pasted on the wall for use, the portable structure can also be made like CN209136573U, the test board can be single or two, when rotating, the test board rotates to drive the rack to overcome the elasticity of the elastic piece, when the friction force of the hand is fixed after the test is in place, after the use is finished, the hand is released, the rack drives the test board to reset under the action of the spring, and the initial position refers to the state that the test board is not subjected to manual pushing force.

In this embodiment, as shown in the figure, the elastic member is a spring. The cost is lower.

In this embodiment, as shown in the figure, a support 11 is disposed in the housing, and one end of the spring is pressed against the support, and the other end is pressed against the rack. Simple structure can realize the reset through the spring.

In this embodiment, as shown in the drawing, the rack outer wall is provided with a receiving slot 411 into which one end of the spring is inserted. The spring is prevented from falling off, and the structure is more stable.

In this embodiment, as shown in the figure, two guiding edges 13 are provided in the housing, and a sliding slot 131 for the rack to move is formed between the two guiding edges. The rack is convenient to move, and the running is more stable.

In this embodiment, as shown, the support is provided with a guide rod 111, which extends partially into the receiving groove. Plays a guiding role, and the operation is more stable.

In this embodiment, as shown in the figure, the spring is sleeved outside the guide rod, a flange 112 is provided on the guide rod, one end of the spring abuts against the side wall of the flange, and the other end abuts against the inner wall of the accommodating groove. Plays a role of a positioning spring, and the whole structure is more stable.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The embodiments described with reference to the drawings are exemplary and intended to be illustrative of the utility model and should not be construed as limiting the utility model. The examples should not be construed as limiting the utility model, but any modifications based on the spirit of the utility model should be within the scope of the utility model.

Claims (7)

1. Vision degree tester with reset function, including casing (1), be equipped with rotatable test board (2) that set up on the casing, be equipped with different lens (21) of a plurality of degrees on the test board, be equipped with window (3) on the casing, each lens is in the wheel appears on the window, its characterized in that when the test board rotates: the test board comprises a shell, wherein a rack (41) running along a straight line is arranged in the shell, a transmission gear (22) meshed with the rack is arranged on the outer wall of the test board, an elastic piece (5) is arranged in the shell and used for pushing the rack by force application, and therefore the test board is in an initial position.

2. The vision metric instrument with reset function of claim 1, wherein: the elastic piece is a spring.

3. The vision metric instrument with reset function of claim 2, wherein: a support (11) is arranged in the shell, one end of the spring is propped against the support, and the other end is propped against the rack.

4. The vision metric instrument with reset function of claim 3, wherein: the outer wall of the rack is provided with a containing groove (411) for one end of the spring to extend into.

5. The vision metric instrument with reset function of claim 4, wherein: two guide edges (13) are arranged in the shell, and a sliding groove (131) for the movement of the rack is formed between the two guide edges.

6. The vision metric instrument with reset function of claim 5, wherein: the support is provided with a guide rod (111), and the guide rod part extends into the accommodating groove.

7. The vision metric instrument with reset function of claim 6, wherein: the spring is sleeved outside the guide rod, a flange (112) is arranged on the guide rod, one end of the spring is propped against the side wall of the flange, and the other end of the spring is propped against the inner wall of the accommodating groove.