Refraction adjustment device for fundus camera and fundus camera

Abstract

The present invention provides a refractive adjustment device of a fundus camera and a fundus camera, wherein the adjustment device comprises: a front lens barrel, one end of which is suitable for installing an eyepiece; a rear lens barrel, one end of which is fixedly connected to the other end of the front lens barrel; a refractive adjustment rear cover, one end of which is movably sleeved with the other end of the rear lens barrel, and the other end of the refractive adjustment rear cover is suitable for fixedly installing a photographing component; a first adjustment device is further provided, which is used to adjust the front lens barrel to axially extend and retract, and drive the rear lens barrel and the refractive adjustment rear cover to move together; and a second adjustment device is provided, which is used to adjust the refractive adjustment rear cover to axially extend and retract relative to the rear lens barrel. The refractive adjustment device of the fundus camera of the present invention has a large refractive adjustment range through the structural design of the first adjustment device and the second adjustment device, and can adapt to clear fundus photography in various situations.

Description

Technical Field

[0001] The invention relates to the technical field of medical ophthalmic optical instruments, and in particular to a refractive adjustment device of a fundus camera and a fundus camera. Background Art

[0002] Fundus cameras are mainly used to capture images of the human retina so that medical personnel can examine fundus diseases or assist medical personnel in judging the condition of other organs. The blood vessels in the fundus are the only blood vessels in the human body that can be directly observed through the body surface. Medical personnel can use fundus cameras to check whether there are lesions in the optic nerve, retina, choroid and refractive media in the fundus. At the same time, they can also diagnose and judge the condition of other systemic diseases with the assistance of fundus cameras, such as screening retinal photos to detect cerebral infarction, cerebral hemorrhage, cerebral arteriosclerosis, brain tumors, diabetes, kidney disease, hypertension, retinopathy of prematurity, glaucoma, age-related macular degeneration, etc. The earlier these diseases are detected, the more conducive to clinical treatment. Therefore, fundus cameras are widely used in clinical screening of fundus diseases and have become an indispensable medical device.

[0003] The fundus camera devices currently on the market have a small refractive adjustment range, and some require manual operation, which is complicated to operate and has poor adjustment efficiency. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the technical defect of the fundus camera in the prior art that the refractive adjustment range is small, thereby providing a refractive adjustment device for a fundus camera with a large refractive adjustment range.

[0005] To this end, the present invention provides a refractive adjustment device for a fundus camera, comprising:

[0006] A front lens barrel, one end of which is suitable for mounting an eyepiece;

[0007] A rear lens barrel, one end of which is fixedly connected to the other end of the front lens barrel;

[0008] A refraction adjustment rear cover, one end of which is movably sleeved with the other end of the rear lens barrel, and the other end of the refraction adjustment rear cover is suitable for fixedly mounting a photographing assembly;

[0009] Also includes

[0010] A first adjusting device is used to adjust the front lens barrel to perform axial expansion and contraction, and drive the rear lens barrel and the refraction adjustment rear cover to move together;

[0011] The second adjusting device is used to adjust the refractive adjustment rear cover to axially extend and retract relative to the rear lens barrel.

[0012] As a preferred solution, the first adjusting device includes:

[0013] A driving cylinder, which is sleeved on the outside of the front lens barrel and has a driving spiral through hole and a positioning rotation through hole;

[0014] A front lens barrel driving column, fixedly arranged outside the front lens barrel and extending into the driving spiral through hole;

[0015] The lens barrel fixing seat is sleeved on the outside of the driving barrel and has a lens barrel guide through hole and a front lens barrel positioning column; the front lens barrel driving column extending out of the driving spiral through hole extends into the lens barrel guide through hole; the front lens barrel positioning column extends into the positioning rotation through hole;

[0016] The first driving structure is used to drive the driving cylinder to rotate, thereby driving the front lens barrel to move.

[0017] As a preferred solution, the first driving structure includes:

[0018] A first driving motor, fixedly arranged on the lens barrel fixing seat;

[0019] a coupling connected to a drive shaft of the first drive motor;

[0020] A first pulley connected to the coupling;

[0021] A first driving ring, sleeved on the outside of the driving cylinder and fixedly connected to the driving cylinder;

[0022] The first belt is sleeved on the first pulley and the first driving ring.

[0023] As a preferred solution, the first driving ring includes:

[0024] Ring-shaped body;

[0025] There are multiple fixing feet, which are integrally arranged on the inner side surface of the annular body and are used for contacting and fixing with the driving cylinder.

[0026] As a preferred solution, it also includes a belt limiter with a U-shaped cross-section. The belt limiter is snap-fitted and fixed between two adjacent fixed feet. After the U-shaped groove accommodates a part of the annular body, the two side walls are higher than a part of the annular body to limit the first belt.

[0027] As a preferred solution, the second adjusting device includes:

[0028] A rear cover driving column is fixedly arranged on the outer wall of the rear lens barrel extending into the inner part of the diopter adjustment rear cover 3;

[0029] A rear cover guide through hole, provided on the diopter adjustment rear cover, for allowing the rear cover driving column to pass through;

[0030] A driving sleeve, which is sleeved on the diopter adjustment rear cover, and has an inner wall provided with a driving thread which can match with the exposed portion of the rear cover driving column after passing through the rear cover guide through hole;

[0031] A limiting cover, which is sleeved on the diopter adjustment rear cover and is located outside the driving sleeve, and is relatively fixed to the diopter adjustment rear cover through a limiting structure;

[0032] The second driving structure is used to drive the driving sleeve to rotate, thereby driving the refractive adjustment back cover to move.

[0033] As a preferred solution, a limiting hole is provided on the inner wall of the limiting cover, and a limiting column is provided on the refractive adjustment rear cover opposite to the limiting hole.

[0034] As a preferred solution, the second driving structure includes:

[0035] A second driving motor is fixedly arranged on the diopter adjustment rear cover;

[0036] a second pulley connected to a drive shaft of the second drive motor;

[0037] The second belt is sleeved on the second pulley and the driving sleeve.

[0038] As a preferred solution, the guide through hole of the rear cover extends axially, and the adjustable length is 5-8 mm.

[0039] The present invention also provides a fundus camera, comprising the refractive adjustment device as described in any one of the above items.

[0040] The technical solution provided by the present invention has the following advantages:

[0041] 1. The refractive adjustment device of the fundus camera of the present invention comprises a front lens barrel, a rear lens barrel and a refractive adjustment rear cover, and a first adjustment device for adjusting the front lens barrel to do axial extension and contraction and driving the rear lens barrel and the refractive adjustment rear cover to move together, and a second adjustment device for adjusting the refractive adjustment rear cover to do axial extension and contraction relative to the rear lens barrel; the refractive adjustment device of the fundus camera of the present invention comprises the first adjustment device for adjusting the front lens barrel to do axial extension and contraction, and is mainly used to capture the observed object; when the observed object is captured, the second adjustment device adjusts the refractive adjustment rear cover to do axial extension and contraction, and adjusts the image to a clear state; the refractive adjustment device of the fundus camera of the present invention has a large refractive adjustment range through the structural design of the first adjustment device and the second adjustment device, and can adapt to clear fundus photography in various situations.

[0042] 2. The refractive adjustment device of the fundus camera of the present invention comprises a first adjusting device including a driving tube, a front lens barrel driving column, a lens barrel fixing seat and a first driving structure. After the first driving structure drives the driving tube to rotate, the driving threaded through hole arranged on the driving tube pushes the front lens barrel driving column, thereby driving the front lens barrel to move. The design of the positioning rotating through hole and the front lens barrel positioning column enables the driving tube itself to only rotate radially and not to move axially. Since one end of the rear lens barrel is fixedly connected to the other end of the front lens barrel, and the refractive adjustment rear cover is sleeved on the other end of the rear lens barrel, when the first adjusting device drives the front lens barrel to move axially, it will also simultaneously drive the rear lens barrel, the refractive adjustment rear cover and the photographing assembly to perform axial telescopic movement.

[0043] 3. The refractive adjustment device of the fundus camera of the present invention, the first driving structure includes a first driving motor, a coupling, a first pulley, a first driving ring and a first belt. The first driving motor drives the first driving ring to rotate through the coupling, the first pulley and the first belt, and then drives the driving cylinder to rotate.

[0044] 4. The refractive adjustment device of the fundus camera of the present invention comprises a first driving ring including an annular body and a plurality of fixing feet. The first driving ring is fixedly connected to the driving tube by the fixing feet. The plurality of fixing feet are arranged on the inner side surface of the annular body, thereby avoiding the problem of heavy weight caused by setting the annular body too thick.

[0045] 5. The refractive adjustment device of the fundus camera of the present invention also includes a belt stopper, which is fixed between two adjacent fixed feet, and after the U-shaped groove accommodates a part of the annular body, the two side walls are higher than a part of the annular body, which is used to limit the first belt. The arrangement of the belt stopper prevents the first belt from slipping off the annular body easily, and is more solid and firm.

[0046] 6. The refractive adjustment device of the fundus camera of the present invention, the second adjustment device includes a rear cover driving column, a rear cover guide through hole, a driving sleeve, a limit cover and a second driving structure, the second driving structure drives the driving sleeve to rotate, the rear cover driving column moves inside the driving thread of the driving sleeve, pushes the driving sleeve and the limit cover, and then drives the refractive adjustment rear cover to move.

[0047] 7. The refractive adjustment device of the fundus camera of the present invention, the second driving structure includes a second driving motor, a second pulley and a second belt, and the second driving motor drives the driving sleeve to rotate through the second pulley and the second belt, thereby driving the refractive adjustment rear cover to move.

[0048] 8. The refractive adjustment device of the fundus camera of the present invention has a guide through hole in the rear cover extending axially with a length of 5-8 mm, which can basically meet the adjustment needs of most human eyes (from capturing to adjusting clarity).

[0049] 9. The present invention also provides a fundus camera, which adopts the refractive adjustment device as described in any one of the above items. Due to the adoption of the above refractive adjustment device, it has all the advantages of adopting the above refractive adjustment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the prior art or the specific implementation manner of the present invention, the drawings used in the description of the prior art or the specific implementation manner are briefly introduced below.

[0051] Figure 1 It is a schematic diagram of the overall structure of the refractive adjustment device of the fundus camera of the present invention.

[0052] Figure 2 yes Figure 1 Schematic diagram of the explosion of the structure of the middle drive sleeve, the lens barrel fixing seat, and the front lens barrel positioning column.

[0053] Figure 3 yes Figure 2 Stereoscopic view of the center front barrel positioning column.

[0054] Figure 4 yes Figure 1 Schematic diagram of the structure of the first drive ring and the first belt.

[0055] Figure 5 The exploded schematic diagram of the structure of the rear lens barrel, the diopter adjustment rear cover, the driving sleeve and the limit cover. Figure numerals: 1, front lens barrel; 2, rear lens barrel; 3, diopter adjustment rear cover; 4, photographing assembly; 51, driving barrel; 52, driving spiral through hole; 53, positioning spiral through hole; 54, front lens barrel driving column; 55, lens barrel fixing seat; 56, lens barrel guide through hole; 57, front lens barrel positioning column; 61, first driving motor; 62, coupling; 63, first pulley; 64, first driving ring; 641, annular body; 642, fixing foot; 65, first belt; 66, belt limiter; 71, rear cover driving column; 72, rear cover guide through hole; 73, driving sleeve; 74, limit cover; 81, second driving motor; 82, second pulley; 83, second belt. DETAILED DESCRIPTION

[0056] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings.

[0057] Example 1

[0058] This embodiment provides a refractive adjustment device for a fundus camera, such as Figure 1As shown, it includes: a front lens barrel 1, one end of which is suitable for installing an eyepiece; a rear lens barrel 2, one end of which is fixedly connected to the other end of the front lens barrel 1; a refractive adjustment rear cover 3, one end of which is movably sleeved on the other end of the rear lens barrel 2, and the other end of the refractive adjustment rear cover 3 is suitable for fixedly installing a photographing component 4; it also includes a first adjustment device, which is used to adjust the front lens barrel 1 to do axial extension and contraction, and drive the rear lens barrel 2 and the refractive adjustment rear cover 3 to move together; a second adjustment device, which is used to adjust the refractive adjustment rear cover 3 to do axial extension and contraction relative to the rear lens barrel 2.

[0059] The refractive adjustment device of the fundus camera of this embodiment has a first adjustment device for adjusting the front lens barrel 1 to do axial extension and contraction, which is mainly used to capture the observed object. When the observed object is captured, the second adjustment device adjusts the refractive adjustment rear cover 3 to do axial extension and contraction to adjust the image to a clear state. The refractive adjustment device of the fundus camera of this embodiment has a large refractive adjustment range through the structural design of the first adjustment device and the second adjustment device, and can adapt to clear fundus photography in various situations.

[0060] like Figure 1-3 As shown, the first adjusting device includes: a driving cylinder 51, which is sleeved on the outside of the front lens barrel 1 and has a driving spiral through hole 52 and a positioning rotation through hole 53; a front lens barrel driving column 54, which is fixedly arranged on the outside of the front lens barrel 1 and extends into the inside of the driving spiral through hole 52; a lens barrel fixing seat 55, which is sleeved on the outside of the driving cylinder 51 and has a lens barrel guide through hole 56 and a front lens barrel positioning column 57; the front lens barrel driving column 54 extending out of the driving spiral through hole 52 extends into the inside of the lens barrel guide through hole 56; the front lens barrel positioning column 57 extends into the inside of the positioning rotation through hole 53; a first driving structure is used to drive the driving cylinder 51 to rotate, and then drive the front lens barrel 1 to move.

[0061] After the first driving structure drives the driving tube 51 to rotate, the driving threaded through hole 52 arranged on the driving tube 51 pushes the front lens barrel driving column 54, thereby driving the front lens barrel 1 to move; the design of the positioning rotation through hole 53 and the front lens barrel positioning column 54 makes the driving tube itself only able to rotate radially and not move axially; since one end of the rear lens barrel 2 is fixedly connected to the other end of the front lens barrel 1, and the refractive adjustment rear cover 3 is sleeved on the other end of the rear lens barrel 2, when the first adjusting device drives the front lens barrel 1 to move axially, it will also simultaneously drive the rear lens barrel 2, the refractive adjustment rear cover 3 and the photographing component 4 to perform axial telescopic movement.

[0062] like Figure 1As shown, the first driving structure includes: a first driving motor 61, fixedly arranged on the lens barrel fixing seat 55; a coupling 62, connected to the driving shaft of the first driving motor 61; a first pulley 63, connected to the coupling 62; a first driving ring 64, sleeved on the outside of the driving cylinder 51, and fixedly connected to the driving cylinder 51; a first belt 65, sleeved on the first pulley 63 and the first driving ring 64. The first driving motor 61 drives the first driving ring 64 to rotate through the coupling 62, the first pulley 63, and the first belt 65, thereby driving the driving cylinder 51 to rotate.

[0063] like Figure 4 As shown, the first drive ring 64 includes: an annular body 641; four fixing feet 642, which are integrally arranged on the inner side of the annular body 641 and are used to contact and fix with the drive cylinder 51. The first drive ring 64 is contacted and fixed with the drive cylinder 51 through the fixing feet 642, and the arrangement of the four fixing feet 642 on the inner side of the annular body 641 reduces the weight of the first drive ring 64, making it more lightweight.

[0064] It also includes a belt stopper 66, which has a U-shaped cross section. The belt stopper 66 is fixed between two adjacent fixing legs 642. After the U-shaped groove accommodates a portion of the annular body 641, the two side walls are higher than a portion of the annular body 641, which is used to stop the first belt 65. The arrangement of the belt stopper 66 prevents the first belt 65 from slipping off the annular body 641 easily, and is more solid and firm.

[0065] like Figure 5 As shown, the second adjustment device includes: a rear cover driving column 71, which is fixedly arranged on the outer wall of the rear lens barrel 2 extending into the inner part of the refractive adjustment rear cover 3; a rear cover guide through hole 72, which is arranged on the refractive adjustment rear cover 3 and is used for the rear cover driving column 71 to pass through; a driving sleeve 73, which is sleeved on the refractive adjustment rear cover 3 and has an inner wall provided with a driving thread that can cooperate with the exposed part of the rear cover driving column 71 after passing through the rear cover guide through hole 72; a limiting cover 74, which is sleeved on the refractive adjustment rear cover 3 and is located on the outer side of the driving sleeve 73 and is relatively fixed to the refractive adjustment rear cover 3 through a limiting structure; a second driving structure, which is used to drive the driving sleeve 73 to rotate, and then drive the refractive adjustment rear cover 3 to move.

[0066] The second driving structure drives the driving sleeve 73 to rotate, and the rear cover driving column 71 moves inside the driving thread of the driving sleeve 73, pushing the driving sleeve 73 and the limiting cover 74, and then driving the refractive adjustment rear cover 3 to move; thereby adjusting the position of the camera assembly.

[0067] A limiting hole is provided on the inner wall of the limiting cover 74 , and a limiting column is provided on the diopter adjustment rear cover 3 opposite to the limiting hole.

[0068] like Figure 1 As shown, the second driving structure includes: a second driving motor 81, fixedly disposed on the diopter adjustment rear cover 3; a second pulley 82, connected to the driving shaft of the second driving motor 81; and a second belt 83, sleeved on the second pulley 82 and the driving sleeve 73.

[0069] The guide through hole 72 of the rear cover extends axially, and the adjustment length is 5-8 mm, which can basically meet the adjustment needs of most human eyes (from capture to adjustment clarity).

[0070] The adjustment process of the refractive adjustment device of the fundus camera in this embodiment is as follows:

[0071] After installing the eyepiece at one end of the front lens barrel, aim it at the eye to be photographed; control the first drive motor 61 to start, and drive the first drive ring 64 to rotate through the coupling 62, the first pulley 63, and the first belt 65, the first drive ring 64 drives the drive tube 51 to rotate, and the drive threaded through hole 52 set on the drive tube 51 pushes the front lens barrel drive column 54, and then pushes the front lens barrel 1 to make axial movement. At the same time, the positioning rotation through hole 53 limits the front mirror positioning column 57 to prevent the drive tube 51 from making axial movement; when adjusting to find the eye to be photographed, the first drive motor 61 stops; the second drive motor 81 is started, and the drive sleeve 73 is driven to rotate through the second pulley 82 and the second belt 83, the rear cover drive column 71 moves in the drive thread of the drive sleeve 73, and pushes the drive sleeve 73 to move, and the drive sleeve 73 squeezes the limit cover 74 or the diopter adjustment rear cover 3, so as to realize the axial movement of the diopter adjustment rear cover 3 relative to the rear lens barrel 2, thereby adjusting the captured eye image to be clear.

[0072] Example 2

[0073] This embodiment provides a fundus camera, comprising a refractive adjustment device as described in any one of Embodiment 1.

[0074] Since the above-mentioned refractive adjustment device is adopted, all the advantages possessed by adopting the above-mentioned refractive adjustment device are possessed.

[0075] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A refractive adjustment device for a fundus camera, comprising: A front lens barrel (1), one end of which is suitable for mounting an eyepiece; A rear lens barrel (2), one end of which is fixedly connected to the other end of the front lens barrel (1); A refractive adjustment rear cover (3), one end of which is movably sleeved with the other end of the rear lens barrel (2), and the other end of the refractive adjustment rear cover (3) is suitable for fixedly mounting a photographing assembly (4); It is characterized by: it also includes The first adjusting device is used to adjust the front lens barrel (1) to perform axial expansion and contraction, and drive the rear lens barrel (2) and the diopter adjustment rear cover (3) to move together; wherein the first adjusting device also has a first driving structure for driving a driving barrel (51) to rotate and thereby drive the front lens barrel (1) to move, and the first driving structure comprises: A first driving motor (61) is fixedly mounted on the lens barrel fixing seat (55); A coupling (62) connected to a drive shaft of the first drive motor (61); A first pulley (63) connected to the coupling (62); A first driving ring (64) is sleeved on the outside of the driving cylinder (51) and is fixedly connected to the driving cylinder (51); A first belt (65) is sleeved on the first pulley (63) and the first driving ring (64); The second adjustment device is used to adjust the axial extension and contraction of the diopter adjustment rear cover (3) relative to the rear lens barrel (2); wherein the second adjustment device also has a second driving structure for driving the driving sleeve (73) to rotate and thereby driving the diopter adjustment rear cover (3) to move.

2. The diopter adjustment device according to claim 1, characterized in that: The first adjusting device comprises: A driving cylinder (51) is sleeved on the outside of the front lens barrel (1) and has a driving spiral through hole (52) and a positioning rotation through hole (53); A front lens barrel driving column (54) is fixedly arranged outside the front lens barrel (1) and extends into the driving spiral through hole (52); The lens barrel fixing seat (55) is sleeved on the outside of the driving barrel (51) and has a lens barrel guiding through hole (56) and a front lens barrel positioning column (57); the front lens barrel driving column (54) extending out of the driving spiral through hole (52) extends into the inside of the lens barrel guiding through hole (56); and the front lens barrel positioning column (57) extends into the inside of the positioning rotation through hole (53).

3. The diopter adjustment device according to claim 1, characterized in that: The first drive ring (64) comprises: annular body (641); There are multiple fixing feet (642) which are integrally arranged on the inner side surface of the annular body (641) and are used for contacting and fixing with the driving cylinder (51).

4. The diopter adjustment device according to claim 3, characterized in that: It also includes a belt limiting piece (66) having a U-shaped cross section. The belt limiting piece (66) is snap-fitted and fixed between two adjacent fixed legs (642). After the U-shaped groove accommodates a portion of the annular body (641), the two side walls are higher than a portion of the annular body (641) and are used to limit the first belt (65).

5. The diopter adjustment device according to claim 1, characterized in that: The second adjusting device comprises: A rear cover driving column (71) is fixedly arranged on the outer wall of the rear lens barrel (2) extending into the inner part of the refraction adjustment rear cover 3; A rear cover guide through hole (72), arranged on the diopter adjustment rear cover (3), for allowing the rear cover driving column (71) to pass through; A driving sleeve (73) is sleeved on the diopter adjustment rear cover (3), and has an inner wall provided with a driving thread that can cooperate with the exposed portion of the rear cover driving column (71) after passing through the rear cover guide through hole (72); The limiting cover (74) is sleeved on the diopter adjustment rear cover (3) and is located outside the driving cover (73), and is relatively fixed to the diopter adjustment rear cover (3) via a limiting structure.

6. The diopter adjustment device according to claim 5, characterized in that: A limiting hole is provided on the inner wall of the limiting cover (74), and a limiting column is provided on the refractive adjustment rear cover (3) opposite to the limiting hole.

7. The diopter adjustment device according to claim 5, characterized in that: The second driving structure comprises: A second driving motor (81) is fixedly arranged on the diopter adjustment rear cover (3); A second pulley (82) connected to a drive shaft of the second drive motor (81); The second belt (83) is sleeved on the second pulley (82) and the driving sleeve (73).

8. The diopter adjustment device according to claim 5, characterized in that: The rear cover guide through hole (72) extends axially, and the adjustable length is 5-8 mm.

9. A fundus camera, characterized in that: The invention comprises a refractive adjustment device as claimed in any one of claims 1 to 8.

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