Two-in-one magnetic cone for dry eye detector

Abstract

The utility model relates to a two-in-one magnetic cone for a dry eye detector, and belongs to the technical field of eye detection equipment. According to the utility model, the two-in-one composite placido ring structure of the main magnetic cone and the grating magnetic cone is realized by ingeniously improving the position layout and the structure of the black ring and the white ring, and the fan ring area is reserved so as to form a light area to examine various symptoms of dry eyes; and meanwhile, the magnetic cone base, the pressing ring and the like are arranged to limit the composite placido ring, the stability in the using process is ensured, the multiple magnets are used for positioning the rotated magnetic cone base, the operation convenience is improved, and rapid installation can be achieved.

Description

Technical Field

[0001] The utility model relates to a two-in-one magnetic cone for a dry eye detector, belonging to the technical field of eye detection equipment. Background Art

[0002] At present, the existing dry eye detectors generally use a grating magnetic cone for detecting the height of the tear river, meibomian gland detection, tear film break-up time detection, blink analysis, etc., and use a main magnetic cone for interferometric measurement of the thickness of the tear film lipid layer. However, due to the need for continuous detection operations in actual applications, it is often necessary to use the grating magnetic cone and the main magnetic cone simultaneously or continuously, and the process involves the mutual switching process between the grating magnetic cone and the main magnetic cone. However, currently, the operator generally manually switches the grating magnetic cone and the main magnetic cone, resulting in problems such as low efficiency or easy contact infection during the switching process.

[0003] Currently, there is a structure of a dry eye detector shown in, for example, CN106725282A, whose placido ring is a straight cylinder type; there are also dry eye detectors shown in, for example, CN219000264U and CN103799976A, but they can only use the main magnetic cone or the grating magnetic cone alone, and the function of its main placido disk also needs to be realized by means of other lighting, which has a greater impact on work efficiency. Summary of the Utility Model

[0004] To solve the above problems, the utility model provides a two-in-one magnetic cone for a dry eye detector, including:

[0005] A magnetic cone seat, the outside of the magnetic cone seat has a first step surface, a second step surface, and a third step surface connected in sequence from top to bottom, and the maximum diameters of the second step surface, the third step surface, and the first step surface decrease in sequence; an annular limiting step is arranged inside the magnetic cone seat;

[0006] A composite placido ring, the composite placido ring is a conical tubular structure and includes an upper ring opening and a lower ring opening, and the diameter of the composite placido ring increases in sequence from the upper ring opening to the lower ring opening; the inner surface of the composite placido ring includes black rings and white rings arranged alternately from top to bottom, the black rings are light-tight but the white rings are light-transmissive, and a white non-annular area is arranged at a position near the lower ring opening on the inner surface of the composite placido ring; the lower ring opening of the composite placido ring is fitted to the annular limiting step; and

[0007] A magnet, embedded in the second step surface.

[0008] Furthermore, the outer surface of the composite Placido ring is covered by a retaining ring. The maximum diameter of the retaining ring is greater than the diameter of the upper ring opening and less than the diameter of the lower ring opening. The composite Placido ring is allowed to maintain a fixed state under the limitation of the retaining ring and the magnetic cone base. This is equivalent to the inner surface of the magnetic cone base restricting the movement of the composite Placido ring in the XY-axis direction, while the annular limiting step and the retaining ring restrict the movement of the composite Placido ring in the Z-axis direction. Therefore, the composite Placido ring can maintain a fixed state.

[0009] Furthermore, the magnet is cylindrical. The second step surface has a plurality of magnet holes distributed in central symmetry. Each magnet hole is embedded with a magnet. When the magnetic cone base rotates to adjust the position, the magnets in different orientations can attract the magnets of the illuminator assembly to quickly fix the position and angle after rotation.

[0010] Furthermore, the first step surface has a plurality of positioning holes distributed in central symmetry. Each positioning hole is provided with a fastening bolt. A plurality of fastening bolts pass through the first step surface to limit the retaining ring.

[0011] Furthermore, the adjacent black ring and white ring are spaced 2 mm apart.

[0012] Furthermore, from the elevation view angle from the lower ring opening towards the upper ring opening, the shape of the non-annular region is a sector ring. The longest arc of the sector ring is located at the lower ring opening. The shortest arc of the sector ring is located between the lower ring opening and the upper ring opening. The central angle of the sector ring is 63° ± 0.03°. When light is mapped onto the cornea through the composite Placido ring, a light ring formed by black rings and white rings that gradually increase from the inside to the outside appears on the cornea. Among them, a sector-shaped bright light region formed by a non-annular region appears near the position of the largest light ring. In this way, it is convenient to implement the examination of various symptoms of dry eye.

[0013] Furthermore, the third step surface has a positioning ring groove.

[0014] Furthermore, the material of the composite Placido ring is milky white acrylic.

[0015] The beneficial effects of the present utility model:

[0016] The utility model ingeniously realizes the two-in-one composite placido ring structure of the main magnetic cone and the grid magnetic cone through the position layout and structural improvement of the black ring and the white ring, and retains the fan-shaped ring area to facilitate the formation of a bright area for the examination of various symptoms of dry eye. It can be directly installed and matched with the lighting component through the magnetic cone seat. At the same time, a magnetic cone seat, a retaining ring, etc. are provided to limit the composite placido ring to ensure the stability during use, and multiple magnets are used to position the rotated magnetic cone seat, improving the operation convenience and enabling quick installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the overall structure in one embodiment of the utility model;

[0018] Figure 2 Schematic diagram of the structure of the magnetic cone seat in one embodiment of the utility model;

[0019] Figure 3 Schematic diagram of the structure of the composite placido ring in one embodiment of the utility model;

[0020] Figure 4 Schematic diagram of the structure of the retaining ring in one embodiment of the utility model;

[0021] Figure 5 Exploded view of the overall structure in one embodiment of the utility model;

[0022] Figure 6 Schematic diagram of the fan-shaped ring shape presented by the non-circular area in the bottom view in one embodiment of the utility model;

[0023] Figure 7 Effect diagram presented on the cornea when light passes through the composite placido ring and is mapped to the cornea in one embodiment of the utility model;

[0024] In the figure: 1, composite placido ring; 2, retaining ring; 3, magnetic cone seat; 4, magnet;

[0025] 11, black ring; 12, white ring; 13, non-circular area; 14, upper ring opening; 15, lower ring opening; 31, first step surface; 32, second step surface; 33, third step surface; 34, annular limiting step. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0028] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0029] Embodiment 1

[0030] As Figures 1-5 shown, the present utility model provides a two-in-one magnetic cone for a dry eye detector, including:

[0031] A magnetic cone seat 3, the outer part of the magnetic cone seat 3 has a first step surface 31, a second step surface 32, and a third step surface 33 connected in sequence from top to bottom, and the maximum diameters of the second step surface 32, the third step surface 33, and the first step surface 31 decrease in sequence; an annular limiting step 34 is arranged inside the magnetic cone seat 3;

[0032] A composite placido ring 1, the composite placido ring 1 is a conical tubular structure and includes an upper ring opening 14 and a lower ring opening 15, and the diameters of the composite placido ring 1 increase in sequence from the upper ring opening 14 to the lower ring opening 15; the inner surface of the composite placido ring 1 includes black rings 11 and white rings 12 arranged alternately from top to bottom, the black rings 11 are light-tight but the white rings 12 are light-transmissive, and a white non-annular area 13 is provided at a position on the inner surface of the composite placido ring 1 close to the lower ring opening 15; the lower ring opening 15 of the composite placido ring 1 is fitted to the annular limiting step 34; and

[0033] A magnet 4, embedded in the second step surface 32.

[0034] Among them, the first stepped surface 31 is fitted with the shaft hole of the lighting component, and the magnet on the second stepped surface 32 is magnetically attracted to the magnet on the lighting component for fixation.

[0035] Furthermore, the outer surface of the composite placido ring 1 is covered by a retaining ring 2. The maximum diameter of the retaining ring 2 is greater than the diameter of the upper ring opening 14 and less than the diameter of the lower ring opening 15. It is allowed that the composite placido ring 1 maintains a fixed state under the limitation of the retaining ring 2 and the magnetic cone base 3. That is, the inner surface of the magnetic cone base 3 restricts the movement of the composite placido ring 1 in the XY axis direction, while the annular limiting step 34 and the retaining ring restrict the movement of the composite placido ring 1 in the Z axis direction. Therefore, the composite placido ring 1 can maintain a fixed state.

[0036] Furthermore, the magnet 4 is cylindrical. The second stepped surface 32 has a plurality of magnet holes distributed in central symmetry. Each magnet hole is embedded with a magnet 4. When the magnetic cone base 3 rotates to adjust the position, the magnets 4 located in different orientations can attract the magnets 4 of the illuminator component to quickly fix the position and angle after rotation.

[0037] Furthermore, the first stepped surface 31 has a plurality of positioning holes distributed in central symmetry. Each positioning hole is provided with a fastening bolt, and a plurality of fastening bolts pass through the first stepped surface to limit the retaining ring.

[0038] Furthermore, the adjacent black ring 11 and white ring 12 are spaced 2 mm apart.

[0039] Furthermore, from the elevation angle from the lower ring opening 15 towards the upper ring opening 14, the shape of the non-circular region 13 is a sector ring. The longest arc of the sector ring is located at the lower ring opening 15, the shortest arc of the sector ring is located between the lower ring opening 15 and the upper ring opening 14, and the central angle of the sector ring is 63°±0.03°. When light is projected onto the cornea through the composite placido ring, a light ring formed by the black ring 11 and the white ring 12 that gradually increases from the inside to the outside appears on the cornea. Among them, a sector-shaped bright light region formed by the non-circular region 13 appears at a position close to the largest light ring, so as to facilitate the examination of various symptoms of dry eye.

[0040] Furthermore, the third stepped surface 33 has a positioning ring groove.

[0041] Furthermore, the material of the composite placido ring 1 is milky white acrylic.

[0042] Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Anyone who is familiar with this technology can make various modifications and decorations without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model should be defined by the claims.

Claims

1. A two-in-one magnetic cone for a dry eye detector, characterized in that: include: A magnetic cone seat, wherein the outer portion of the magnetic cone seat has a first step surface, a second step surface, and a third step surface connected in sequence from top to bottom, and the maximum diameters of the second step surface, the third step surface, and the first step surface decrease in sequence; and an annular limiting step is arranged inside the magnetic cone seat; A composite placido ring, the composite placido ring is a conical tubular structure and includes an upper ring opening and a lower ring opening, the diameter of the composite placido ring increases from the upper ring opening to the lower ring opening; the inner surface of the composite placido ring includes black rings and white rings arranged alternately from top to bottom, the black rings are opaque but the white rings are translucent, and the inner surface of the composite placido ring has a white non-annular area near the lower ring opening; the lower ring opening of the composite placido ring is matched with the annular limiting step; as well as The magnet is embedded in the second step surface.

2. A two-in-one magnetic cone for a dry eye detector according to claim 1, characterized in that: The outer surface of the composite placido ring is covered by a pressing ring, the maximum diameter of which is larger than the diameter of the upper ring opening and smaller than the diameter of the lower ring opening, allowing the composite placido ring to maintain a fixed state under the limitation of the pressing ring and the magnetic cone seat.

3. A two-in-one magnetic cone for a dry eye detector according to claim 2, characterized in that: The magnet is cylindrical, and the second step surface has a plurality of magnet holes distributed in a centrally symmetrical manner, and a magnet is embedded in each magnet hole.

4. A two-in-one magnetic cone for a dry eye detector according to claim 3, characterized in that: The first step surface has a plurality of positioning holes which are centrally symmetrically distributed, each of the positioning holes is provided with a fastening bolt, and the plurality of fastening bolts pass through the first step surface to limit the pressing ring.

5. The two-in-one magnetic cone for dry eye detector according to claim 1, characterized in that: The interval between the adjacent black rings and white rings is 2 mm.

6. A two-in-one magnetic cone for a dry eye detector according to claim 5, characterized in that: In an upward angle of view from the lower ring opening toward the upper ring opening, the non-annular area is in the shape of a fan ring.

7. A two-in-one magnetic cone for a dry eye detector according to claim 6, characterized in that: The longest arc of the fan ring is located at the lower ring opening, the shortest arc of the fan ring is located between the lower ring opening and the upper ring opening, and the central angle of the fan ring is 63°±0.03°.

8. A two-in-one magnetic cone for a dry eye detector according to claim 7, characterized in that: The third step surface has a positioning ring groove.

9. The two-in-one magnetic cone for a dry eye detector according to claim 1, characterized in that: The composite placido ring is made of milky white acrylic.

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