A portable handheld fundus camera

Abstract

The utility model discloses a portable handheld fundus camera, comprising a camera body, wherein a lens barrel is sleeved on the outer surface of the camera body, a support ring seat is fixed on the outer surface of the camera body, a convex shell is arranged on the upper end of the support ring seat, a positioning slider is arranged on the upper surface of the lens barrel, a threaded screw is connected to the inner surface of the positioning slider via a bearing on the inner surface of the convex shell, the outer surface of the threaded screw is connected to the inner surface of the positioning slider via a thread, a torsion block is fixedly connected to the outer end surface of the threaded screw, a lens is arranged on the inner surface of the lens barrel, the threaded screw is rotated to drive the positioning slider to move, the lens barrel can be driven to move in a positioning manner, the moving position can be adjusted conveniently, the accuracy can be improved, the flexibility during adjustment can be improved, the positioning can be achieved, and the use is convenient.

Description

Technical Field

[0001] The utility model relates to the field of handheld fundus cameras, and more specifically to a portable handheld fundus camera. Background Art

[0002] The blood vessels at the fundus are the only blood vessels in the human body that can be directly observed through the body surface. With a fundus camera, doctors can check whether the optic nerve, retina, choroid and refractive medium at the fundus have lesions. At the same time, they can also diagnose and judge the condition of other organ diseases with the help of fundus cameras.

[0003] In the prior art patent, CN215078349U discloses a portable handheld fundus camera, including a camera body, a lens barrel, a tether, a gasket and a lens, wherein a rack is provided on the top of the camera body, and the rack is fixedly connected to the camera body, a gear column is provided at the center of the top of the lens barrel, and the gear column is meshed with the rack, a wheel shaft is provided at the center of the gear column, and the gear column and the lens barrel are movably connected through the wheel shaft;

[0004] In the prior art, as proposed in the above patent, a telescopic structure is adopted, which is driven by the meshing of gears and racks for telescopic movement. The telescopic mechanism has low precision and low movement adjustment accuracy, and is inconvenient to position during adjustment, making it inconvenient to use. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a portable handheld fundus camera, which can drive the positioning slider to move by rotating the threaded screw, and can drive the lens barrel to move in a positioning manner, so as to facilitate the adjustment of the moving position, improve the accuracy, and improve the flexibility during adjustment. It can be positioned and is easy to use.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] A portable handheld fundus camera comprises a camera body, wherein a lens barrel is sleeved on the outer surface of the camera body, a support ring seat is fixed to the outer surface of the camera body, a convex shell is arranged on the upper end of the support ring seat, a positioning slider is arranged on the upper surface of the lens barrel, a threaded screw is connected to the inner surface of the positioning slider via a bearing on the inner surface of the convex shell, the outer surface of the threaded screw is connected to the inner surface of the positioning slider via a thread, a torsion block is fixedly connected to the outer end surface of the threaded screw, a lens is arranged on the inner surface of the lens barrel, and the threaded screw is rotated to drive the positioning slider to move, and the lens barrel to move in a positioning manner, so as to facilitate the adjustment of the moving position, improve the accuracy, and improve the flexibility during adjustment, and the lens can be positioned and used conveniently.

[0008] Furthermore, the support ring seat adopts an annular structure, is fixedly connected to the inner surface of the camera body, and an annular groove is provided on the outer surface of the support ring seat.

[0009] Furthermore, an eye gasket is fixedly mounted on the outer end surface of the lens barrel, and the eye gasket is made of silicone.

[0010] Furthermore, a positioning protrusion is provided on the back side of the eye gasket, and the positioning protrusion is clamped on the inner surface of the lens barrel.

[0011] Furthermore, a positioning slot is provided on the outer end surface of the lens barrel, and the positioning protrusion is plugged into the inner surface of the positioning slot.

[0012] Furthermore, the outer end surface of the eye gasket is provided with a rounded corner.

[0013] Furthermore, the positioning protrusions are cylindrical structure protrusions, and six groups of the positioning protrusions are distributed on the back outer surface of the eye gasket.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] (1) By rotating the threaded screw, the positioning slider can be driven to move, and the lens barrel can be driven to move in a positioning manner, so that the moving position can be adjusted easily, the accuracy can be improved, the flexibility during adjustment can be improved, and the positioning is possible, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a right side view of the eye gasket ring of the utility model;

[0018] Figure 3 It is a side view of the overall structure of the utility model.

[0019] Description of the numbers in the figure:

[0020] 1 camera body, 2 lens barrel, 3 support ring seat, 4 convex shell, 5 slider, 6 threaded screw, 7 torsion block, 8 annular groove, 9 lens, 10 eye gasket, 11 positioning protrusion. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1

[0023] See also Figure 1-3 A portable handheld fundus camera comprises a camera body 1, a lens barrel 2 is sleeved on the outer surface of the camera body 1, a support ring seat 3 is fixed on the outer surface of the camera body 1, a convex shell 4 is arranged on the upper end of the support ring seat 3, a positioning slider 5 is arranged on the upper surface of the lens barrel 2, a threaded screw 6 is connected to the inner surface of the positioning slider 5 through a bearing on the inner surface of the convex shell 4, the outer surface of the threaded screw 6 is connected to the inner surface of the positioning slider 5 through a thread, a torsion block 7 is fixedly connected to the outer end surface of the threaded screw 6, and a lens 9 is arranged on the inner surface of the lens barrel 2;

[0024] The support ring seat 3 adopts an annular structure and is fixedly connected to the inner surface of the camera body 1, and an annular groove 8 is provided on the outer surface of the support ring seat 3;

[0025] An eye gasket 10 is fixedly mounted on the outer end surface of the lens barrel 2. The eye gasket 10 is made of silicone material. A positioning protrusion 11 is arranged on the back of the eye gasket 10. The positioning protrusion 11 is clamped on the inner surface of the lens barrel 2. The positioning protrusion 11 is a cylindrical structure protrusion. Six groups of the positioning protrusions 11 are distributed on the outer surface of the back of the eye gasket 10. A positioning slot is arranged on the outer end surface of the lens barrel 2. The positioning protrusion 11 is plugged into the inner surface of the positioning slot.

[0026] It is convenient to install and replace the eye gasket 10;

[0027] When in use, the outer end surface of the eye gasket 10 is provided with a chamfered corner. When in use, the eye skin can be fitted against the outer surface of the eye gasket 10, which can buffer the squeezing force and prevent the skin from being worn. When adjusting the position of the lens barrel 2, the torsion block 7 can be rotated, which can drive the threaded screw 6 to rotate, which can drive the positioning slider 5 to move, which can drive the lens barrel 2 to move, and can drive it to move finely and flexibly. It can stop moving when it stops rotating, which is convenient for positioning and easy to use.

[0028] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A portable handheld fundus camera, comprising a camera body (1), characterized in that: The outer surface of the camera body (1) is sleeved with a lens barrel (2), the outer surface of the camera body (1) is fixed with a support ring seat (3), the upper end of the support ring seat (3) is provided with a convex shell (4), the upper surface of the lens barrel (2) is provided with a positioning slider (5), the inner surface of the convex shell (4) is connected to a threaded screw (6) via a bearing, the outer surface of the threaded screw (6) is connected to the inner surface of the positioning slider (5) via a thread, the outer end surface of the threaded screw (6) is fixedly connected with a torsion block (7), and the inner surface of the lens barrel (2) is provided with a lens (9).

2. A portable handheld fundus camera according to claim 1, characterized in that: The support ring seat (3) adopts an annular structure and is fixedly connected to the inner surface of the camera body (1), and an annular groove (8) is provided on the outer surface of the support ring seat (3).

3. A portable handheld fundus camera according to claim 1, characterized in that: An eye gasket (10) is fixedly mounted on the outer end surface of the lens barrel (2), and the eye gasket (10) is made of silicone material.

4. A portable handheld fundus camera according to claim 3, characterized in that: A positioning protrusion (11) is provided on the back side of the eye gasket ring (10), and the positioning protrusion (11) is clamped on the inner surface of the lens barrel (2).

5. A portable handheld fundus camera according to claim 4, characterized in that: The outer end surface of the lens barrel (2) is provided with a positioning slot, and the positioning protrusion (11) is plugged into the inner surface of the positioning slot.

6. The portable handheld fundus camera according to claim 3, characterized in that: The outer end surface of the eye gasket (10) is provided with a rounded corner.

7. The portable handheld fundus camera according to claim 4, characterized in that: The positioning protrusions (11) are cylindrical structure protrusions, and six groups of the positioning protrusions (11) are distributed and arranged on the back outer surface of the eye gasket (10).

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