CN218045068U - Auxiliary device of vision screening instrument - Google Patents

Abstract

The utility model relates to an auxiliary device of a vision screening instrument, which comprises a fixing mechanism used for fixing the vision screening instrument without shielding screening; screening the area; and the refraction imaging mechanism is arranged to form a folded optical path between the vision screening instrument and the screening area, so that when the vision screening instrument is fixed by the fixing mechanism, the vision screening area can be screened through the formed optical path. The utility model discloses the efficiency of improvement examination that the vision screening appearance can be very big reduces the required actual distance of examination.

Description

Auxiliary device of vision screening instrument

Technical Field

The utility model relates to an auxiliary device of vision screening instrument.

Background

The vision screening appearance of hand-held type when carrying out the vision screening, need remove certain distance and aim at the person's that is surveyed eyes through the camera lens of handheld vision screening appearance and carry out the vision screening, and during the problem that from this and produce, when handheld vision screening appearance, the adjustment distance need spend certain time, and the handheld in-process that carries out the vision screening, the arm is difficult to avoid taking place to rock, increase the time of screening, the screening personnel can produce fatigue or even damage carrying out long-time work back arm.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at shortens the actual shared distance of examination of hand-held type vision screening appearance through providing an auxiliary device to fix it, the distance control process of the handheld regulation vision screening appearance that has removed has greatly improved screening efficiency.

In order to achieve the above object, the utility model discloses an auxiliary device of eyesight screening instrument includes:

a fixing mechanism for fixing the vision screening instrument without screening,

the area of screening is selected such that,

and the refraction imaging mechanism is arranged to form a folded light path between the vision screening instrument and the screening area, so that when the vision screening instrument is fixed by the fixing mechanism, the vision screening area can be screened through the formed light path.

During the detection, be located the screening region with the eye, through the fixed vision screening appearance of fixed establishment, let the vision screening appearance carry out the vision screening along the eye of folding light path in to the screening region to avoided handheld vision screening appearance to take place to rock, adjust the distance and spend the time scheduling problem for a long time, improved the efficiency of screening.

In some embodiments of the present invention, the fixing mechanism includes an insertion slot, a screening opening is disposed on the insertion slot, and the vision screening device is inserted into the insertion slot for fixing and performing vision screening through the screening opening.

In some embodiments of the present invention, a notch for taking out the vision screening instrument is provided on one side of the insertion slot.

In some embodiments of the present invention, the refractive imaging mechanism includes one or more mirrors for refracting the light path.

In some embodiments of the present invention, the optical path is folded twice.

The utility model discloses a some embodiments still include the casing, have on the casing fixed establishment and screening region, have the cavity in the casing, refraction imaging mechanism be located the cavity.

In some embodiments of the present invention, the refraction imaging mechanism includes one or more mirror surfaces for refracting the light path, the mirror surfaces are installed in the mirror frame, and the mirror frame is fixed in the cavity.

In some embodiments of the present invention, a handle is disposed on the housing.

In some embodiments of the present invention, the fixing mechanism further comprises a placement portion disposed near the fixing mechanism.

The utility model discloses the efficiency of improvement examination that the vision screening appearance can be very big reduces the required actual distance of examination.

Drawings

Fig. 1 is a schematic diagram of a prior art vision screening instrument.

Fig. 2 is a schematic diagram of a principle of reflection imaging.

Fig. 3 is a schematic structural diagram of the auxiliary device.

Fig. 4 is a schematic view of the vision screening instrument fixed by an auxiliary device.

Fig. 5 is a schematic view of the internal structure of the auxiliary device of the embodiment with a part of the housing removed.

Fig. 6 is a side view of the internal structure of the auxiliary device of the embodiment with a part of the housing removed.

Fig. 7 is a schematic view of the screening principle of the auxiliary device in the embodiment.

In the figure: 1. the auxiliary device comprises an auxiliary device, a shell 100, a handle 101, a left shell 102, a right shell 103, an insertion groove 110, a screening opening 111, a notch 112, a screening window 120, a storage groove 130, a mirror 210, a first mirror 211, a second mirror 212, a mirror frame 20, a screening instrument 2, a lens 21, a holding part 22, a display panel 23, incident light 31 and emergent light 32.

Detailed Description

When the existing vision screening instrument screens the vision of human eyes, the distance between the vision screening instrument and a screened person needs to be adjusted, a certain time needs to be spent in the adjustment process, and the arms of an operator can be fatigued or damaged after a long time. These factors all affect the outcome of the screening.

Because of the problem, the utility model discloses an auxiliary device of vision screening appearance is provided to make the position of examination distance and vision screening appearance can both fix through this auxiliary device, thereby solve prior art's above-mentioned problem. The auxiliary device mainly comprises a fixing mechanism, a screening area and a refraction imaging mechanism in the structure, wherein the fixing mechanism is used for fixing the vision screening instrument, and the refraction imaging mechanism is arranged to form a folded light path between the vision screening instrument and the screening area. In above-mentioned structure, fixed establishment can cooperate with the lens for the image that the eyes are located screening region can be gathered to the vision screening appearance, and the screening distance of the in-process of screening is confirmed by the support, and actually shortens after folding by the mirror surface, thereby need not to adjust with holding, thereby again because reduced the very big efficiency that has improved the screening of these regulation links.

The utility model discloses in, refraction imaging mechanism forms folding light path between the camera lens of vision screening appearance and screening region, and the light path of straight line propagation is on the lens of the final vision screening appearance that reachs of refraction originally. In this process, the total distance traveled by the light is constant, but the distance required for screening is reduced due to folding. The vision screening instrument after being fixed by the fixing mechanism can utilize the folded light path to screen the eyes in the area without holding the adjusting distance by a person, and the actual occupied distance of the screening is shortened, thereby greatly improving the screening efficiency. The principle of the method can be shown in fig. 2, a detection distance of one meter is needed under an original straight path, when a mirror surface exists, light is refracted once, the passing distances of the incident light 31 and the emergent light 32 are half meters, and the actual transverse distance only occupies about 0.43 meter if the refraction angle is 30 degrees, so that the actual distance needed in screening is greatly reduced compared with the original 1 meter.

The fixing mechanism adopted by the auxiliary device can be any structure capable of fixing the visual screening instrument without shielding the screening. One of the fixing mechanisms is shown in fig. 3, and includes an insertion slot 110, a screening opening 111 is formed on the insertion slot 110, referring to fig. 4, the vision screening instrument 2 is inserted into the insertion slot 110 for fixing, and a lens of the vision screening instrument is located in the screening opening and is used for screening vision outwards through the screening opening. The structure can facilitate the quick taking and placing of the vision screening instrument. For some vision screening instruments with threaded fixation holes, the fixation mechanism may also be configured as a bracket with freely rotatable screws that secure the vision screening instrument. In addition, any structure including, but not limited to, a magnetic-type fixing structure, a clamping fixing mechanism, a fitting fixing mechanism, etc. may be used as a specific structure of the fixing mechanism.

Referring to fig. 3, a notch 112 for taking out the vision screening apparatus 2 may be formed on one side of the insertion groove 110. When the vision screening instrument 2 is inserted into the insertion slot 110, the vision screening instrument 2 can be taken out by holding the vision screening instrument 2 through the notch 2, so as to prevent the problem that the insertion fit is too tight to take out.

The screening area in the auxiliary device may be any area that provides for screening of the eye by the vision screening apparatus. As the screening area is provided by the screening window in this embodiment, the screening window can clearly give the screened area of the eye, so that the screened person can know where the screened person should place the eye. The screening window may be an aperture that can cover the eye position, such as an elongated aperture that can cover both eye ranges, or two apertures that cover the left and right eyes, respectively, and so on. Referring to fig. 3 and 4, the screening window 120 of the present embodiment has a shape of an elongated opening for covering the range of both eyes.

The refractive imaging mechanism employed in the auxiliary device is any mechanism capable of performing refractive imaging, and one of the possible configurations includes one or more mirrors for refracting the optical path. The principle of the mirror refraction path is clear to those skilled in the art, and light rays incident at a certain angle will be refracted at the same exit angle after passing through the mirror, so that images can be refracted by arranging a plurality of mirrors and calculating the refraction angle. In this embodiment, as shown in fig. 5 to 7, the optical path is folded twice, and the object light of the eyeball enters from the screening window 120, is refracted by the second mirror 212, reaches the first mirror 211, is refracted again, and is captured by the lens 21. In other embodiments, the number of folds may be one, three, or more.

In this embodiment, referring to fig. 3, the auxiliary device 1 further includes a housing 100, the housing 100 has the fixing mechanism (the fixing mechanism is the insertion slot 110 in fig. 3) and a screening area (the screening area is formed by the screening window 120 in fig. 3), the housing 100 has a cavity 104 (see fig. 5), and the refractive imaging mechanism (composed of the first mirror 211 and the second mirror 212 in fig. 3) is located in the cavity 104. The housing can avoid interference of ambient light with the screening, and integrates the fixing mechanism, the screening area and the setting imaging mechanism on the housing 100 to facilitate productization, sales and transportation. When refraction imaging mechanism has included one or more mirror surfaces that are used for refracting the light path, the mirror surface mountable in the picture frame, the picture frame is fixed in the cavity in. Further, in order to increase portability, in some embodiments, the housing is further provided with a handle 101, and an operator can carry the auxiliary device by lifting the handle. In some embodiments, a storage unit 130 is further included, and is disposed near the fixed mechanism, the arrangement of the storage unit 130 is an improvement for the actual screening scenario, and the storage unit can hold a battery, a case book for recording, paper, a pen, or any other tools, instruments, etc. that need to be used. In this embodiment, the object placing part is a slot body disposed on one side of the fixing mechanism.

When screening, insert visual screening appearance 2 to auxiliary device 1's insertion portion 110 in, the person being screened keeps the eye position to be located the screening region, screens the window 120 promptly, opens visual screening appearance 2 and screens, and visual screening appearance 2 shoots the eye of the person being screened through refraction imaging mechanism, finally obtains the vision screening result. Auxiliary device can reduce the distance that actually needs when the screening to need not handheld adjustment and can carry out the screening, greatly improved the accuracy and the stability of screening.

The embodiments of the present invention are only used for illustration, and do not limit the scope of the claims, and other substantially equivalent alternatives that can be conceived by those skilled in the art are all within the scope of the present invention.

Claims (2)

1. Auxiliary device of vision screening appearance, its characterized in that includes:

a fixing mechanism for fixing the vision screening instrument without screening,

the area of screening is selected such that,

a refraction imaging mechanism which is arranged to form a folded light path between the vision screening instrument and the screening area so that when the vision screening instrument is fixed by the fixing mechanism, the vision screening area can be screened by the formed light path,

the fixing mechanism comprises an insertion groove, a screening opening is arranged on the insertion groove, the vision screening instrument is inserted into the insertion groove for fixing and is used for screening the vision outwards through the screening opening,

a notch for taking out the vision screening instrument is arranged on one side of the insertion groove,

the light path is folded twice,

the device also comprises a shell, the shell is provided with the fixing mechanism and a screening area, a cavity is arranged in the shell, the refraction imaging mechanism is positioned in the cavity,

the refraction imaging mechanism comprises one or more mirror surfaces for refracting light paths, the mirror surfaces are arranged in a mirror frame, the mirror frame is fixed in the cavity,

also comprises an object placing part which is arranged near the fixing mechanism.

2. The vision screening apparatus aid of claim 1, wherein a handle is provided on the housing.

Images