Head-mounted light sensation vision auxiliary measuring instrument

Abstract

The utility model relates to the technical field of light sensation vision measuring equipment, in particular to a head-mounted auxiliary measuring instrument for light sensation vision. According to the technical scheme, the device comprises a pair of eye abutting cylinders corresponding to two eyes. The measuring instrument is worn on the head of a patient through the cooperation of the eye abutting cylinder, the middle cylinder, the adjusting mechanism, the front cylinder, the aperture adjusting mechanism, the light source mechanism, the bandage mechanism and other structures, and through the elastic resilience force of the elastic adjusting band, the back-of-brain bandage is arranged on the back of the head in a sleeving mode, and the eye clamping patch abuts against the eyes of the patient and cannot be too tight or too loose. Then the LED lamp beads in the groove are turned on to generate a light source, the aperture adjusting mechanism is controlled to adjust the size by manually rotating the knob, so that the size of the light source generated by the LED lamp beads received by the eyes is adjusted, and the process is equivalent to the distance from 5m to the light source intensity in front of the eyes in light sensation measurement. Eye light sensation measurement can be finally carried out on a patient at any place, the limitation of the place on examination is reduced, and clinical use convenience is achieved.

Description

Technical Field

[0001] This utility model relates to the field of optical vision measurement equipment technology, and in particular to a head-mounted optical vision auxiliary measuring instrument. Background Technology

[0002] In existing technologies, during visual acuity measurement, based on the patient's visual acuity, a visual acuity test is conducted when it is between 1.0 and 0.1. Secondly, if the visual acuity is 0.09-0.01, and the patient cannot even identify the largest test mark (0.1 line) at 5 meters, the patient is instructed to gradually approach the visual acuity chart until they can identify it. The testing distance starts at 1 meter and gradually increases until the mark can be correctly identified, and this distance is recorded, such as "the index is 30cm". Furthermore, if the index cannot be identified at 5cm, the test is switched to manual measurement. Finally, in a dark room, a flashlight is shone on the patient's eye while the other eye is completely covered to prevent light penetration. The patient is tested to see if they can perceive light, and this is recorded as "light perception" or "no light perception". The distance at which the light is perceived is then recorded, generally up to 5 meters.

[0003] The above situation illustrates a common clinical practice where, when a patient needs light perception measurements, the examiner must accompany the patient to a completely dark examination room. This presents several challenges in clinical practice. For patients, it increases the distance they must travel and raises the risk of falls. For clinical staff, it requires the availability of a vacant examination room that is also completely dark. Furthermore, the staff must temporarily leave their workstations during the examination, increasing both the examination time and the waiting time for other patients. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a head-mounted light-sensing vision-assisting measuring instrument.

[0005] The technical solution of this utility model is as follows: A head-mounted light-sensing visual acuity measuring device, comprising a pair of eye-support tubes corresponding to both eyes, and further comprising: a middle tube fixedly connected to one end of the eye-support tubes, the middle tube being provided with an adjustment mechanism to adapt the distance between the pair of eye-support tubes to different patients' eye distances; a front tube installed at the end of the middle tube away from the eye-support tubes, the front tube having a light source mechanism simulating bright light inside; an aperture adjustment mechanism installed in the front tube to control the amount of light entering the eye-support tubes from the light source mechanism; and a strap mechanism provided on the middle tube to allow the front tube, middle tube, and eye-support tubes to be worn on the heads of different patients.

[0006] Optionally, the adjusting mechanism includes a pair of first rotating blocks and second rotating blocks, wherein one of the middle cylinders is fixedly connected to the corresponding first rotating block, and the other middle cylinder is fixedly connected to the corresponding second rotating block. The first rotating block and the second rotating block are rotatably connected by a support shaft, and a retaining sleeve for locking the second rotating block is fixedly sleeved in the middle of the support shaft.

[0007] Optionally, a pair of locking heads that lock the corresponding first rotating block are fixedly connected to both ends of the support shaft.

[0008] Optionally, the light source mechanism includes multiple grooves arranged in a circumferential array inside the front cylinder, and each groove is equipped with an LED lamp bead.

[0009] Optionally, each of the front cylinders is equipped with a knob for adjusting the aperture size using the aperture adjustment mechanism.

[0010] Optionally, the strapping mechanism includes a support block fixedly connected to the outer wall of the middle cylinder. Each support block is provided with an elastic adjustment strap. A head strap is fixedly connected to one end of each pair of elastic adjustment straps away from the support block. Each end of each elastic adjustment strap near the support block is provided with a pair of fixing strips that lock the support block.

[0011] Optionally, each end of the eye-support tube away from the middle tube is fixedly connected to a clip-on eye shield, and the middle of the clip-on eye shield is provided with a sponge pad to support the eye.

[0012] In summary, this application includes at least one of the following beneficial technical effects:

[0013] This utility model utilizes the cooperation of structures such as an eyepiece, a middle tube, an adjustment mechanism, a front tube, an aperture adjustment mechanism, a light source mechanism, and a strap mechanism to allow the measuring instrument to be worn on the patient's head. The elastic rebound force of the elastic adjustment strap ensures that the head strap is placed on the back of the head and the eyepiece is not too tight or too loose against the patient's eyes.

[0014] The LED beads within the recess are further activated to generate a light source. The aperture adjustment mechanism is controlled by manually rotating a knob, thus adjusting the size of the light source received by the eye. This process is equivalent to measuring the light intensity at a distance of 5 meters from the eye during light perception measurement. Ultimately, this allows for the measurement of ocular light perception for patients from any location, reducing location limitations and providing greater convenience for clinical use. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of a head-mounted optical vision assistive measuring instrument according to this utility model is provided;

[0016] Figure 2 for Figure 1 A partial diagram of the split structure;

[0017] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure;

[0018] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0019] Reference numerals: 1. Front tube; 11. Knob; 12. Aperture adjustment mechanism; 13. Groove; 14. LED bead; 2. Middle tube; 21. First rotating block; 22. Support shaft; 23. Sleeve; 24. Clip; 25. Second rotating block; 3. Eye tube; 31. Eye cover; 32. Sponge gasket; 4. Elastic adjustment band; 41. Headband; 42. Fixing strip; 5. Support block. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0021] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0022] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] It should be noted that the terms "comprising," "including," 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 includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example

[0027] like Figures 1 to 4As shown, this utility model proposes a head-mounted optical vision assistive measuring device, including a pair of eye-support tubes 3 corresponding to both eyes, and a middle tube 2 fixedly connected to one end of the eye-support tubes 3. Each end of the eye-support tubes 3 away from the middle tube 2 is fixedly connected to a clip-on eye shield 31. The clip-on eye shield 31 increases the contact area when the end of the eye-support tube 3 touches the eye, preventing excessive pain. A sponge pad 32 is provided in the middle of the clip-on eye shield 31 to press against the eye. The sponge pad 32 makes the clip-on eye shield 31 fit more snugly against the eye, preventing gaps between the eye and the clip-on eye shield 31, and also making the clip-on eye shield 31 more comfortable when pressed against the eye. The middle tube 2 is equipped with an adjustment mechanism that adapts the distance between the pair of eyepieces 3 to different patient eye distances. A front tube 1, installed at the end of the middle tube 2 furthest from the eyepieces 3, is equipped with a knob 11 for adjusting the aperture mechanism 12. The front tube 1 contains a light source mechanism simulating illumination. The aperture adjustment mechanism 12, located inside the front tube 1, controls the amount of light entering the eyepieces 3 from the light source mechanism. The aperture adjustment mechanism 12 is an adjustable opening (usually composed of a set of adjustable blades) that controls the amount of light entering the lens. Adjusting the aperture size changes the amount of light entering, a feature commonly used in cameras. Most cameras (especially SLR cameras, mirrorless cameras, or some high-end digital cameras) are equipped with an aperture control mechanism. This is usually operated via a knob 11; by rotating this knob 11, the user can adjust the lens aperture size, thus affecting the amount of light entering. A strap mechanism is also provided on the middle tube 2 to allow the front tube 1, middle tube 2, and eyepieces 3 to be worn on different patients' heads.

[0028] The relationship between light source brightness and distance: The intensity of light decreases inversely with the square of the distance, which can usually be expressed by the following formula:

[0029]

[0030] in:

[0031] I represents light intensity (brightness).

[0032] P is the power of the light source (the total amount of light emitted).

[0033] r is the distance between the light source and the measurement point.

[0034] Equivalent light source brightness: Assume the brightness of a candle at 5 meters is I, and the brightness of a light source at 10 centimeters (0.1 meters) is L. We can derive the relationship between the two using the above formula:

[0035]

[0036] If we want the brightness of a light source at 10 cm to be equal to the brightness of a light source at 5 m, we can set I1 = I2. By simplifying the formula, we can obtain:

[0037]

[0038] This means that the light source power P at 10 cm is 1 / 2500 of the candlelight power P at 5 m. In summary, by controlling the brightness of the light source and utilizing the aforementioned light intensity attenuation relationship, a mechanism for predicting light perception at different distances can be established.

[0039] Furthermore, the adjustment mechanism includes a pair of first rotating blocks 21 and second rotating blocks 25. One middle cylinder 2 is fixedly connected to the corresponding first rotating block 21, and the other middle cylinder 2 is fixedly connected to the corresponding second rotating block 25. The first rotating block 21 and the second rotating block 25 are rotatably connected by a support shaft 22. A pair of clamps 24 that clamp the corresponding first rotating block 21 are fixedly connected to both ends of the support shaft 22, and a clamp 23 that clamps the second rotating block 25 is fixedly sleeved in the middle of the support shaft 22.

[0040] The light source mechanism includes multiple grooves 13 arranged in a circular array inside the front cylinder 1. Each groove 13 is equipped with an LED bead 14. The LED bead 14 is a small light-emitting element made of light-emitting diode technology, which is widely used in various applications such as lighting, display, and signal indication.

[0041] Furthermore, the strapping mechanism includes support blocks 5 fixedly connected to the outer wall of the middle cylinder 2. Each support block 5 is equipped with an elastic adjustment band 4, which is typically made of highly elastic and stretchable materials, such as elastic fibers (e.g., spandex, Lycra) or rubber. The elasticity of these materials allows the adjustment band to lengthen when stretched and return to its original shape and size after relaxation. Therefore, the adjustment band can automatically adjust according to different head circumferences to fit different head sizes. A head strap 41 is fixedly connected to the end of each pair of elastic adjustment bands 4 away from the support block 5, and a pair of fixing strips 42 are provided at the end of each elastic adjustment band 4 near the support block 5 to secure it.

[0042] In this embodiment, when a head-mounted optical vision assistive measuring device is required, such as Figure 1As shown, the middle cylinder 2 rotates around the support shaft 22 via a pair of first rotating blocks 21 and second rotating blocks 25, causing the middle cylinder 2 to move the eye-holding tubes 3. This continues until the distance between the pair of eye-holding tubes 3 equals the patient's interpupillary distance, ensuring that each eye-holding tube 3 can accurately press one end of the eye shield 31 against the patient's eyes. Then, the head strap 41 is placed on the back of the patient's head, and the elasticity of the elastic adjustment strap 4 is used to ensure that the head strap 41 is neither too tight nor too loose, and that the eye shield 31 is pressed against the patient's eyes, thus ensuring comfort. The LED beads 14 in the groove 13 can then be turned on, generating a light source. Finally, the aperture adjustment mechanism 12 can be manually adjusted by rotating the knob 11, thus adjusting the size of the light source received by the eyes. This process is equivalent to the distance from 5m to the light source intensity in front of the eyes in light sensing measurement, making it convenient and quick.

[0043] The preferred embodiments of this utility model described above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A head-mounted photovisive auxiliary measuring instrument comprising a pair of eye-approaching tubes (3) corresponding to both eyes, characterized in that, Also includes: A middle tube (2) is fixedly connected to one end of the eye tube (3), and the middle tube (2) is provided with an adjustment mechanism to adapt the distance between a pair of eye tubes (3) to different patients' eye distances; A front cylinder (1) is installed at the end of the middle cylinder (2) away from the eyepiece (3), and the interior of the front cylinder (1) is provided with a light source mechanism to simulate bright light; An aperture adjustment mechanism (12) is installed inside the front tube (1) to control the amount of light entering the eye tube (3) from the light source mechanism; A strapping mechanism is provided on the middle tube (2) to allow the front tube (1), middle tube (2) and eye tube (3) to be worn on the heads of different patients.

2. The head-mounted photovisive auxiliary measuring instrument according to claim 1, characterized in that, The adjustment mechanism includes a pair of first rotating blocks (21) and second rotating blocks (25). One of the middle cylinders (2) is fixedly connected to the corresponding first rotating block (21), and the other middle cylinder (2) is fixedly connected to the corresponding second rotating block (25). The first rotating block (21) and the second rotating block (25) are rotatably connected by a support shaft (22). The middle part of the support shaft (22) is fixedly fitted with a sleeve (23) that holds the second rotating block (25).

3. The head-mounted photovisive auxiliary measuring instrument according to claim 2, characterized in that, The two ends of the support shaft (22) are fixedly connected to a pair of clamps (24) that clamp the corresponding first rotating block (21).

4. The head-mounted photovisive auxiliary measuring instrument according to claim 1, characterized in that, The light source mechanism includes multiple grooves (13) arranged in a circular array inside the front cylinder (1), and each groove (13) is provided with an LED lamp bead (14).

5. The head-mounted optical vision assistive measuring instrument according to claim 1, characterized in that, Each of the front cylinders (1) is equipped with a knob (11) for adjusting the aperture size using the aperture adjustment mechanism (12).

6. The head-mounted photovisive auxiliary measuring instrument according to claim 1, characterized in that, The strapping mechanism includes a support block (5) fixedly connected to the outer wall of the middle cylinder (2). Each support block (5) is provided with an elastic adjustment strap (4). A pair of elastic adjustment straps (4) are fixedly connected to a head strap (41) at the end away from the support block (5). Each elastic adjustment strap (4) is provided with a pair of fixing strips (42) that lock the support block (5) at the end near the support block (5).

7. The head-mounted photovisive auxiliary measuring instrument according to claim 1, characterized in that, Each of the eye-holding tubes (3) is fixedly connected to an eye shield (31) at the end away from the middle tube (2), and the eye shield (31) is provided with a sponge pad (32) in the middle to hold the eye.

Images