Vision detection device for physical examination in ophthalmology department

Abstract

The utility model discloses a vision detection device for physical examination in the ophthalmology department, which relates to the technical field of medical instruments and comprises a protective shell and a rolling unit. Comprising a winding piece arranged in a protective shell in a penetrating mode, a winding roller connected with the winding piece, a first pull rope wound around the outer side of the winding roller, a first rotating shaft and a second rotating shaft which are arranged in the protective shell and can rotate, and a driving sleeve arranged on the outer side of the first rotating shaft and the outer side of the second rotating shaft in a sleeving mode. The plane belt covers the outer sides of the first rotating shaft and the second rotating shaft, the plane belt is matched with the driving sleeve, and vision detection marks are marked on the outer surface of the plane belt. The winding piece releases elastic potential energy to drive the plane belt to rotate, then the position of the first pull rope is fixed, the position of the rotating plane belt can be fixed, then the positions of letters on the outer surface of the plane belt are changed, and the authenticity of vision detection is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field especially, it is with visual acuity detection device for ophthalmic physical examination. BACKGROUND

[0002] Standard visual acuity chart is the basic evaluation tool commonly used in the occasion such as medical examination, occupation access, which has strict requirements on visual acuity, and can quickly and effectively reflect the visual acuity level of the examinee, at present, such detection still widely adopts traditional printed visual acuity chart, the arrangement of the optotype of this kind of visual acuity chart and the opening direction of each row of "E" are fixed, so that the examinee can cheat by memorizing the order or shape of the optotype in advance, thereby affecting the authenticity and fairness of the detection result.

[0003] With the continuous development of visual acuity detection technology, in order to overcome the problem that the content of traditional printed visual acuity chart is fixed and can be memorized by the examinee, thereby affecting the authenticity of the detection result, electronic dynamic visual acuity chart is gradually applied in daily visual acuity detection, the electronic dynamic visual acuity chart randomly switches the optotype through the screen, which effectively prevents the situation of cheating by memorizing the detection of visual acuity, but this kind of electronic equipment has high cost and poor impact resistance, and is easy to be damaged when colliding, and local display may be abnormal after colliding, thereby affecting the normal visual acuity detection process. UTILITARY MODEL

[0004] Therefore, the technical problem to be solved by the utility model is that the existing electronic dynamic visual acuity chart has high cost and is easy to be damaged by collision, which affects the use of medical staff.

[0005] The above technical problem is solved by the following technical scheme: the utility model provides a visual acuity detection device for ophthalmic physical examination, which comprises a protective shell, a rolling unit and a plane belt.

[0006] The rolling unit comprises a winding piece arranged in the interior of the protective shell, a winding roller connected with the winding piece, a first pull rope wound on the outer side of the winding roller, a first bevel gear arranged at the end of the winding roller away from the winding piece, a second bevel gear meshed with the first bevel gear, a first rotating shaft and a second rotating shaft arranged in the interior of the protective shell and rotatable, and a driving sleeve sleeved on the outer sides of the first rotating shaft and the second rotating shaft.

[0007] The second bevel gear is connected with the first rotating shaft, and the first rotating shaft and the second rotating shaft are symmetrically arranged in the interior of the protective shell.

[0008] The plane belt covers the outer sides of the first rotating shaft and the second rotating shaft, and the plane belt is matched with the driving sleeve, and the outer surface of the plane belt is marked with visual acuity detection marks.

[0009] In an optimal embodiment of the visual acuity detection device for ophthalmic physical examination, the protective shell is internally provided with fixing plates, the number of the fixing plates is two groups, and the two groups of fixing plates are symmetrically arranged along the center line of the protective shell.

[0010] Both ends of the first rotating shaft are provided with bearing seats, and the bearing seats are respectively located on the inner wall of the bottom of the protective shell and the inner side of the fixing plate.

[0011] In an optimal embodiment of the visual acuity detection device for ophthalmic physical examination, the number of the driving sleeves is multiple groups, and the multiple groups of driving sleeves are equidistantly distributed along the axial direction of the first rotating shaft.

[0012] The driving sleeve on the outer side of the second rotating shaft is vertically and horizontally flush with one of the driving sleeves arranged on the outer side of the first rotating shaft.

[0013] In an optimal embodiment of the visual acuity detection device for ophthalmic physical examination, the tail end of the first pull rope penetrates the protective shell and extends to the outer side of the protective shell, and the tail end of the first pull rope is connected with a first pull ring.

[0014] The first pull rope can make the winding piece compress energy when the first pull rope is separated from the outer side of the winding roller.

[0015] The winding piece can drive the winding roller to rotate when releasing energy.

[0016] In an optimal embodiment of the visual acuity detection device for ophthalmic physical examination, the flat belt cooperates with one group of driving sleeves, and the distance between the one group of driving sleeves can make the surface of the flat belt flatten.

[0017] The first rotating shaft can drive the driving sleeves to synchronously rotate, and the driving sleeves can drive the flat belt to synchronously rotate.

[0018] In an optimal embodiment of the visual acuity detection device for ophthalmic physical examination, the outer surface of the driving sleeve is provided with a recess, and the inner surface of the flat belt is provided with a protrusion matched with the recess of the surface of the driving sleeve.

[0019] In an optimal embodiment of the visual acuity detection device for ophthalmic physical examination, the number of the flat belts is multiple groups, and the letters shown on the outer surfaces of the multiple groups of flat belts are different in size.

[0020] In an optimal embodiment of the visual acuity detection device for ophthalmic physical examination, a limiting unit is further included.

[0021] The limiting unit comprises a fixing sleeve penetrating the outer wall of the protective shell, a positioning column sleeved on the inner side of the fixing sleeve, a spring arranged in the gap between the fixing sleeve and the positioning column, a clamping groove connected with the second rotating shaft, and a second pull rope connected with the positioning column.

[0022] The side wall of the fixing sleeve is provided with a sliding groove, and the end of the positioning column is provided with a sliding plate penetrating the sliding groove and extending to the outside of the sliding groove.

[0023] In a preferred embodiment of the ophthalmic physical examination visual acuity detection device, the tail end of the second pull rope penetrates the protective shell and extends to the outside of the protective shell, and the tail end of the second pull rope is connected with a second pull ring.

[0024] The end of the second pull rope away from the tail end is connected with the positioning column.

[0025] In a preferred embodiment of the ophthalmic physical examination visual acuity detection device, the opening position of the protective shell is provided with a partition plate, and a plurality of observation holes are arranged on the surface of the partition plate.

[0026] The beneficial effects of the utility model lie in that the first pull rope can be separated from the outer surface of the winding roller by pulling down the first pull ring; in the unwinding process, the first pull rope can drive the winding roller to rotate, so that the winding piece is compressed to store energy; when the staff releases the first pull ring pulled down, the winding piece releases its elastic potential energy to drive the winding roller to rotate rapidly; the rotation of the winding roller drives the first bevel gear to rotate, and then drives the driving sleeve arranged on the outer side of the first rotating shaft to rotate through the rotation of the first bevel gear; the rotation of the driving sleeve drives the plane belt to rotate, so as to adjust the position of the plane belt and change the order of the letters. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings of the embodiments of the utility model will be briefly introduced below; obviously, the drawings described below only relate to some embodiments of the utility model, and are not a limitation on the utility model.

[0028] Figure 1 A perspective structural schematic view of the visual acuity detection device is shown;

[0029] Figure 2 A front view of the visual acuity detection device is shown;

[0030] Figure 3 A connection structure schematic view of the rolling unit and the protective shell is shown;

[0031] Figure 4 A partial enlarged view of A of Figure 3 ​

[0032] Figure 5 The connection structure diagram of the limiting unit and the protective shell is shown;

[0033] Figure 6 The partial enlarged view of B of the protective shell is shown; Figure 5 The partial enlarged view of B of the protective shell is shown;

[0034] Figure 7 The explosion structure diagram of the rolling unit is shown;

[0035] Figure 8 The explosion structure diagram of the limiting unit is shown.

[0036] In the figure: 1, protective shell; 11, fixed plate; 2, rolling unit; 21, winding piece; 22, winding roller; 23, first pull rope; 231, first pull ring; 24, first bevel gear; 25, second bevel gear; 26, first rotating shaft; 27, second rotating shaft; 28, driving sleeve; 3, flat belt; 4, partition plate; 5, limiting unit; 51, fixed sleeve; 511, sliding groove; 52, positioning column; 521, sliding plate; 53, spring; 54, clamping groove piece; 55, second pull rope; 551, second pull ring. DETAILED DESCRIPTION

[0037] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below in conjunction with specific embodiments and drawings.

[0038] The terms used in the present application are those general terms currently widely used in the art in consideration of the functions regarding the present application, but these terms can be changed according to the intention of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meaning thereof will be described in the detailed description of the present application. Therefore, the terms used in the specification should not be understood as mere names, but based on the meaning of the terms and the overall description of the present application.

[0039] Referring to Figures 1-8 , the present embodiment provides a visual acuity detection device for ophthalmic physical examination, which comprises a protective shell 1, a rolling unit 2, and a flat belt 3;

[0040] The rolling unit 2 comprises a winding piece 21 provided inside the protective shell 1, a winding roller 22 connected with the winding piece 21, a first pull rope 23 wound outside the winding roller 22, a first bevel gear 24 provided at the end of the winding roller 22 away from the winding piece 21, a second bevel gear 25 engaged with the first bevel gear 24, a first rotating shaft 26 and a second rotating shaft 27 provided inside the protective shell 1 and rotatable, and a driving sleeve 28 sleeved outside the first rotating shaft 26 and the second rotating shaft 27.

[0041] It should be noted that the protective shell 1 is made of aluminum alloy sheet by sheet metal process; and the top back of the protective shell 1 is fixedly connected with a fixing buckle, and a through hole is formed in the inside of the fixing buckle. The bolt is penetrated through the through hole and matched with the mounting hole reserved on the wall surface, so that the protective shell 1 can be fixed at a suitable position on the wall surface.

[0042] Further, the winding member 21 comprises a shell, and the shell is fixedly connected with the protective shell 1 through screws; the winding member 21 further comprises a tape spring arranged in the shell, and a fixed shaft is arranged at the central position of the tape spring. The tape spring rotates to drive the fixed shaft to rotate synchronously; and the fixed shaft is fixedly connected with the winding roller 22 through a bolt.

[0043] Specifically, a plurality of turns of the first pull rope 23 are wound outside the winding roller 22. When the first pull rope 23 is pulled down, the first pull rope 23 rotates to drive the winding roller 22 to rotate synchronously. The winding roller 22 rotates to compress the tape spring in the shell synchronously. When the hand pulling down the first pull rope 23 is released, the tape spring in the winding member 21 releases the elastic potential energy, thereby driving the winding roller 22 to rotate reversely, and the first pull rope 23 is rapidly wound outside the winding roller 22.

[0044] Preferably, the winding roller 22 is fixedly connected with the first bevel gear 24, and the first bevel gear 24 is engaged with the second bevel gear 25. The winding roller 22 rotates to drive the first bevel gear 24 to rotate synchronously. The first bevel gear 24 rotates to drive the second bevel gear 25 to rotate. The first bevel gear 24 and the second bevel gear 25 are matched to convert the horizontal rotation of the winding roller 22 into the vertical rotation of the first rotating shaft 26.

[0045] Further, the second bevel gear 25 is connected with the first rotating shaft 26, and the first rotating shaft 26 and the second rotating shaft 27 are symmetrically arranged in the protective shell 1. The planar belt 3 covers the outside of the first rotating shaft 26 and the second rotating shaft 27, and the planar belt 3 is matched with the driving sleeve 28. The outer surface of the planar belt 3 is marked with a visual detection mark.

[0046] It should be noted that the first rotating shaft 26 and the second rotating shaft 27 are arranged inside the protective shell 1, and the first rotating shaft 26 and the second rotating shaft 27 are symmetrically arranged along the short axis center line of the protective shell 1. The first rotating shaft 26 and the second rotating shaft 27 are matched to wrap the planar belt 3 outside the first rotating shaft 26 and the second rotating shaft 27.

[0047] The number of the driving sleeves 28 is multiple groups, and the multiple groups of driving sleeves 28 are arranged outside the first rotating shaft 26 and the second rotating shaft 27. The second rotating shaft 27 and the first rotating shaft 26 are arranged at the same height position and each has a group of driving sleeves 28. The distance between the two groups of driving sleeves 28 arranged oppositely can ensure the surface of the planar belt 3 to be flat.

[0048] It should be noted that the outer surface of the flat band 3 is provided with a mark for visual detection to ensure that the examinee can clearly see the corresponding letters.

[0049] Specifically, the outer surface of the flat band 3 is marked with the letter "E", and the opening direction of the adjacent letters is random to ensure the accuracy of the detection; when the flat band 3 rotates a certain distance and is fixed at any position, the position of the letters on the surface of the flat band 3 will be disturbed, effectively avoiding cheating by memorizing.

[0050] In use, the medical staff pulls down the first pull rope 23, and the first pull rope 23 is unwound from the outside of the winding roller 22; in the unwinding process, the first pull rope 23 drives the winding roller 22 to rotate, at which time the tape spring inside the winding member 21 is compressed and shrinks; when the hand pulling down the first pull rope 23 is released, the tape spring inside the winding member 21 releases the elastic potential energy, thereby driving the winding roller 22 to rotate; the rotation of the winding roller 22 rapidly winds the first pull rope 23 outside the winding roller 22, and after the first pull rope 23 is retracted by a certain distance, the first pull rope 23 can be fixed outside the protective shell 1, so that the first pull rope 23 cannot continue to be wound; the reverse rotation of the winding roller 22 can drive the first bevel gear 24 to rotate; the rotation of the first bevel gear 24 further drives the second bevel gear 25 to rotate, and the second bevel gear 25 is connected with the first rotating shaft 26, so that the rotation of the second bevel gear 25 synchronously drives the first rotating shaft 26 to rotate; the rotation of the first rotating shaft 26 further drives the driving sleeve 28 outside to rotate, and the driving sleeve 28 cooperates with the flat band 3 to ensure that the rotation of the driving sleeve 28 can drive the flat band 3 to rotate synchronously; the flat band 3 cooperates with the driving sleeve 28 outside the second rotating shaft 27 in the rotating process, thereby driving the second rotating shaft 27 to rotate synchronously; the rotation of the flat band 3 changes the position of the surface characters facing the examinee, effectively avoiding the problem of visual cheating by memorizing the letter arrangement rule.

[0051] With reference to Figures 1-7 As an optional embodiment, the inside of the protective shell 1 is provided with a fixed plate 11, the number of the fixed plate 11 is two groups, and the two groups of fixed plates 11 are symmetrically arranged along the center line of the protective shell 1; the both ends of the first rotating shaft 26 are provided with bearing seats, and the bearing seats are respectively located on the inner wall of the bottom of the protective shell 1 and the inner side of the fixed plate 11.

[0052] It should be noted that, in order to further ensure that the first rotating shaft 26 and the second rotating shaft 27 can normally rotate, in this embodiment, the number of the second bevel gear 25 is two groups, and the two groups of second bevel gears 25 are cooperated with the first bevel gear 24 on the upper and lower sides along the long axis direction of the protective shell 1.

[0053] In order to ensure that the first rotating shaft 26 is well supported at both ends, the fixed plate 11 is arranged at the middle position of the protective shell 1, and the fixed plate 11 is welded and fixed with the protective shell 1, both ends of the first rotating shaft 26 are provided with bearing seats, and the bearing seat at one end of the first rotating shaft 26 is connected with the inner wall of the protective shell 1; the bearing seat arranged at the other end of the first rotating shaft 26 is connected with the fixed plate 11.

[0054] Specifically, the number of the second rotating shaft 27 corresponds to the number of the first rotating shaft 26, and the number of the second rotating shaft 27 is also two groups; both ends of the second rotating shaft 27 are provided with bearing seats, and the positions of the bearing seats are the same as those of the first rotating shaft 26.

[0055] Further, the number of the driving sleeve 28 is multiple groups, and the multiple groups of driving sleeves 28 are distributed equidistantly along the axial direction of the first rotating shaft 26; the driving sleeve 28 outside the second rotating shaft 27 is vertically flush with one of the driving sleeves 28 arranged outside the first rotating shaft 26.

[0056] It should be noted that the device is arranged in the vertical direction during the arrangement process, and the long axis direction of the protective shell 1 is perpendicular to the ground, and the short axis direction of the protective shell 1 is parallel to the ground; that is, the long axis direction of the protective shell 1 is the vertical direction, and the short axis direction of the protective shell 1 is the horizontal direction.

[0057] Further, the tail end of the first pull rope 23 penetrates the protective shell 1 and extends to the outside of the protective shell 1, and the tail end of the first pull rope 23 is connected with the first pull ring 231; the first pull rope 23 can make the winding piece 21 compress energy when it is separated from the outside of the winding roller 22; the release of energy of the winding piece 21 can drive the winding roller 22 to rotate.

[0058] It should be noted that the tail end of the first pull rope 23 penetrates to the outside of the protective shell 1, which can better facilitate the staff to drive the winding roller 22 to rotate by pulling the first pull rope 23; the tail end of the first pull rope 23 is provided with the first pull ring 231, which can better facilitate the staff to grasp.

[0059] It should be noted that the outside of the protective shell 1 is provided with a fixed column, and the first pull rope 23 can be wound outside the fixed column to fix the length of the first pull rope 23 that can be pulled out, so as to control the angle of reverse rotation of the winding roller 22, and the position of the letter shown by the plane belt 3 can be adjusted by controlling the rotation angle of the winding roller 22.

[0060] Further, the outer surface of the driving sleeve 28 is provided with a recess; the inner surface of the plane belt 3 is provided with a protrusion matched with the surface recess of the driving sleeve 28.

[0061] It should be noted that the outer surface of the drive sleeve 28 is matched with the inner surface of the plane belt 3 to realize that the rotation of the drive sleeve 28 can drive the plane belt 3 to rotate synchronously; the first rotating shaft 26 can drive the plane belt 3 to rotate, and the rotation of the plane belt 3 can further drive the second rotating shaft 27 to rotate, and the first rotating shaft 26 and the second rotating shaft 27 are matched, thereby realizing the adjustment of the position of the plane belt 3.

[0062] Further, the number of the plane belt 3 is multiple groups, and the letters shown on the outer surfaces of the multiple groups of the plane belt 3 are different in size.

[0063] In order to further adapt to the needs of vision detection, the number of the plane belt 3 is multiple groups, and the multiple groups of the plane belt 3 are equidistantly distributed along the long axis direction of the protective shell 1, the letters shown on the outer surfaces of each group of the plane belt 3 are different in size, and the letter openings are also randomly oriented.

[0064] When the medical staff needs to adjust the position of the letters shown on the plane belt 3, the first pull rope 23 can be expanded by pulling down the first pull ring 231, and the first pull rope 23 drives the winding roller 22 to rotate in the expansion process, and the winding of the winding piece 21 inside the winding roller 22 can compress the tape spring, so that the tape spring is in a compressed energy storage state; when the hand pulling down the first pull ring 231 is released, the elastic potential energy of the tape spring inside the winding piece 21 is released, and the winding roller 22 is rapidly rotated, and the rotation of the winding roller 22 can drive the first bevel gear 24 to rotate, and the first bevel gear 24 can synchronously drive the first rotating shaft 26 connected with the second bevel gear 25 to rotate, and the rotation of the first rotating shaft 26 can further drive the plane belt 3 to rotate; after the plane belt 3 is rotated to any position, the staff pulls the first pull rope 23, so that the winding roller 22 cannot rotate, and the first pull rope 23 is wound on the fixed column outside the protective shell 1, and the position between the first pull rope 23 and the protective shell 1 is fixed by knotting, so as to change the position of the letters shown on the outer surface of the plane belt 3, and effectively avoid the problem of cheating in memorizing the visual acuity chart.

[0065] Reference Figures 5-8 In an embodiment provided in the present application, the limiting unit 5 comprises a fixed sleeve 51 penetrating the outer wall of the protective shell 1, a positioning column 52 sleeved on the inner side of the fixed sleeve 51, a spring 53 arranged in the gap between the fixed sleeve 51 and the positioning column 52, a clamping groove piece 54 connected with the second rotating shaft 27, and a second pull rope 55 connected with the positioning column 52; the side wall of the fixed sleeve 51 is provided with a sliding groove 511, and the end of the positioning column 52 is provided with a sliding plate 521, and the sliding plate 521 penetrates the sliding groove 511 and extends to the outside of the sliding groove 511.

[0066] It should be noted that the fixed sleeve 51 is fixedly connected with the protective shell 1 through screws, and the inside of the fixed sleeve 51 is a hollow structure, and the positioning column 52 is sleeved on the inside of the fixed sleeve 51; one end of the spring 53 abuts against the sliding plate 521, and the other end abuts against the inner wall of the fixed sleeve 51; the spring 53 pushes the positioning column 52 to move away from the fixed sleeve 51 in the normal state, so that the end of the positioning column 52 can be inserted into the inside of the clamping groove 54, and the clamping groove 54 is limited.

[0067] Specifically, one end of the second pull rope 55 is connected with the positioning column 52, and the positioning column 52 can be driven to move towards the inside of the fixed sleeve 51 by pulling the second pull rope 55, and the positioning column 52 extrudes the spring 53 in the movement process, so that the spring 53 is in a compressed energy storage state.

[0068] The sliding groove 511 cooperates with the sliding plate 521, which can effectively limit the movement track of the positioning column 52, and ensure that the positioning column 52 can only move along the direction of the sliding groove 511; at the same time, the cooperation between the sliding groove 511 and the sliding plate 521 can also effectively prevent the positioning column 52 from completely separating from the inside of the fixed sleeve 51.

[0069] Further, the tail end of the second pull rope 55 penetrates the protective shell 1 and extends to the outside of the protective shell 1, and the tail end of the second pull rope 55 is connected with the second pull ring 551; one end of the second pull rope 55 away from the tail end is connected with the positioning column 52.

[0070] It should be noted that one end of the second pull rope 55 penetrates the sliding groove 511 and extends to the inside of the fixed sleeve 51, and a guide column is arranged on the inside of the sliding groove 511, so that when the second pull rope 55 is pulled downward, the guide column changes the track of the second pull rope 55, so that the stress direction of the second pull rope 55 can pull the positioning column 52 to move.

[0071] Specifically, the tail end of the second pull rope 55 is provided with the second pull ring 551, and the second pull ring 551 can better facilitate the operator to grasp the second pull rope 55 and drive the second pull rope 55 to move downward.

[0072] Further, the protective shell 1 is provided with a partition plate 4 at the opening position, and a plurality of observation holes are formed in the surface of the partition plate 4.

[0073] It should be noted that the corresponding visual detection letters can be directly observed through the through holes formed in the surface of the partition plate 4; and the partition plate 4 can cover the transmission structure inside the protective shell 1, so as to ensure the appearance of the whole device; when the plane belt 3 rotates, only the letters displayed in the through hole position of the partition plate 4 can be observed by the examinee, which further reduces the possibility of the examinee cheating by vision.

[0074] Specifically, the device has low cost and is not easy to be damaged in collision, and can be well adapted to different use scenes.

[0075] In use of the device, the medical staff needs to pull the second pull rope 55 to move downward, so that the second pull rope 55 drives the positioning column 52 to move away from one side of the clamping groove piece 54; under the condition that the second pull rope 55 is not loosened, the first pull rope 23 is pulled to move downward, when the first pull rope 23 is pulled to the longest distance, the hand that pulls the first pull rope 23 to move downward is loosened, so that the tape spring inside the winding piece 21 can drive the winding roller 22 to rotate, the winding roller 22 rotates and can drive the first bevel gear 24 to rotate, the first bevel gear 24 can synchronously drive the first rotating shaft 26 and the flat belt 3 arranged outside the second rotating shaft 27 to rotate, in the process of adjusting the position of the flat belt 3, the hand that pulls the second pull rope 55 downward is loosened, under the elastic force of the spring 53, the positioning column 52 is pushed to move to the direction close to the clamping groove piece 54, the clamping groove piece 54 is synchronously rotated with the second rotating shaft 27, when the side wall slot of the clamping groove piece 54 corresponds to the positioning column 52, the positioning column 52 is inserted into the slot inside the clamping groove piece 54, thereby realizing the fixation of the position of the second rotating shaft 27, the position of the second rotating shaft 27 is fixed, thereby the fixation of the position of the flat belt 3 can be realized, the position of the flat belt 3 is fixed in the process of rotating, the position of the letters shown on the surface of the flat belt 3 through the observation hole of the partition plate 4 is also random, and it is not easy for the examinee to remember, thereby ensuring the authenticity of the vision detection.

[0076] Finally, it should be noted that the above detailed description of the method and device is only an embodiment, and those skilled in the art can modify the embodiment in different ways without departing from the scope of the present application.

[0077] Importantly, the above embodiments are only used to illustrate the technical solutions of the present application and not to limit, although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. An ophthalmic physical examination visual acuity testing device, characterized by: The device comprises a protective shell (1), a rolling unit (2) and a flat belt (3). The rolling unit (2) comprises a winding piece (21) arranged inside the protective shell (1), a winding roller (22) connected with the winding piece (21), a first pull rope (23) wound outside the winding roller (22), a first bevel gear (24) arranged at the end of the winding roller (22) away from the winding piece (21), a second bevel gear (25) engaged with the first bevel gear (24), a first rotating shaft (26) and a second rotating shaft (27) arranged inside the protective shell (1) and rotatable, and a driving sleeve (28) arranged outside the first rotating shaft (26) and the second rotating shaft (27). The second bevel gear (25) is connected with the first rotating shaft (26), and the first rotating shaft (26) and the second rotating shaft (27) are symmetrically arranged inside the protective shell (1). The flat belt (3) covers outside the first rotating shaft (26) and the second rotating shaft (27), and the flat belt (3) is matched with the driving sleeve (28), and the outer surface of the flat belt (3) is marked with a visual detection mark.

2. The visual detection device for ophthalmic physical examination according to claim 1, wherein: The inside of the protective shell (1) is provided with a fixed plate (11), and the number of the fixed plate (11) is two groups, and the two groups of fixed plates (11) are symmetrically arranged along the center line of the protective shell (1). Both ends of the first rotating shaft (26) are provided with bearing seats, and the bearing seats are respectively located on the inner wall of the bottom of the protective shell (1) and the inner side of the fixed plate (11).

3. The visual detection device for ophthalmic physical examination according to claim 2, wherein: The number of the driving sleeve (28) is multiple groups, and the multiple groups of driving sleeves (28) are equally distributed along the axis direction of the first rotating shaft (26); The driving sleeve (28) outside the second rotating shaft (27) is vertically flush with one of the driving sleeves (28) arranged outside the first rotating shaft (26).

4. The visual detection device for ophthalmic physical examination according to claim 3, wherein: The tail end of the first pull rope (23) penetrates the protective shell (1) and extends to the outside of the protective shell (1), and the tail end of the first pull rope (23) is connected with a first pull ring (231); The first pull rope (23) can make the winding piece (21) compress energy when it is separated from the outside of the winding roller (22); The winding piece (21) can drive the winding roller (22) to rotate when it releases energy.

5. The visual detection device for ophthalmic physical examination according to claim 4, wherein: The flat belt (3) is matched with a group of driving sleeves (28), and the distance between the driving sleeves (28) can make the surface of the flat belt (3) flat; The first rotating shaft (26) can drive the driving sleeve (28) to rotate synchronously, and the driving sleeve (28) can drive the flat belt (3) to rotate synchronously.

6. The ophthalmic physical examination visual detection device according to claim 5, characterized in that: The outer surface of the drive sleeve (28) is provided with a recess; the inner surface of the flat band (3) is provided with a protrusion matched with the surface recess of the drive sleeve (28).

7. The ophthalmic physical examination visual detection device according to claim 6, characterized in that: The number of the flat bands (3) is multiple groups, and the letters shown on the outer surfaces of the multiple groups of flat bands (3) are different in size.

8. The ophthalmic physical examination visual acuity detection device according to claim 7, characterized in that: Further comprising a limiting unit (5); The limiting unit (5) comprises a fixing sleeve (51) penetrating the outer wall of the protective shell (1), a positioning column (52) sleeved on the inner side of the fixing sleeve (51), a spring (53) arranged in the gap between the fixing sleeve (51) and the positioning column (52), a clamping groove piece (54) connected with the second rotating shaft (27), and a second pull rope (55) connected with the positioning column (52); The side wall of the fixing sleeve (51) is provided with a sliding groove (511), and the end of the positioning column (52) is provided with a sliding plate (521), and the sliding plate (521) penetrates the sliding groove (511) and extends to the outside of the sliding groove (511).

9. The ophthalmic physical examination visual detection device according to claim 8, characterized in that: The tail end of the second pull rope (55) penetrates the protective shell (1) and extends to the outside of the protective shell (1), and the tail end of the second pull rope (55) is connected with a second pull ring (551); The end of the second pull rope (55) away from the tail end is connected with the positioning column (52).

10. The ophthalmic physical examination visual detection device according to claim 9, characterized in that: The opening position of the protective shell (1) is provided with a partition plate (4), and the surface of the partition plate (4) is provided with multiple groups of observation holes.

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