A prism device for detecting strabismus

Abstract

The application relates to the technical field of ophthalmic medical diagnostic instruments, and discloses a three-prism strabismus detection device which comprises a base, a bearing tray rotatably connected in the base, a supporting shaft fixedly connected to the base, a first pressing unit and a second pressing unit slidably connected in the supporting shaft, a locking assembly arranged in the first pressing unit, and a third pressing unit slidably connected in the second pressing unit. A tooth groove and a rotating groove are arranged in the bearing tray, and a three-prism seat is slidably connected in the bearing tray. In the application, the first pressing unit slides in the tooth groove through a sliding block, the fixed-angle rotation of the bearing tray is realized, and the single-time back-and-forth sliding of the first pressing unit only makes the bearing tray replace a three-prism seat; meanwhile, a locking block is embedded into a locking hole of a second pressing block, the second pressing unit is locked, and the bearing tray is prevented from being wrongly rotated due to mistaken operations.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ophthalmic medical diagnostic instruments, in particular to a three-prism strabismus detection device. BACKGROUND

[0002] In the preoperative eye position detection of strabismus eyes, the three-prism corneal reflex method is one of the commonly used methods. When operating, a three-prism of appropriate size needs to be placed in front of the patient's eyes, and a flashlight is placed in front of the patient's eyes at the same time. The patient is instructed to fix his eyes on the light source, and the corneal reflex points of the patient's eyes are observed to see if they are located in the center of the pupil. Three-prisms come in different sizes and need to be adapted to different patients with different degrees of strabismus. For patients with different types of strabismus, the bottom of the three-prism is placed in different directions, and the base of the prism needs to be matched with the direction of the strabismus.

[0003] The prior art lacks orderly storage carriers such as rotating and drawer types, and 18 different degrees of three-prisms that adapt to different types of strabismus are mostly scattered in ordinary storage boxes or stacked without partitioning next to the detection table. The doctor needs to find the corresponding degree of prism one by one, and if the degree is not accurate, the prism needs to be taken out, checked and placed again, which increases the detection time for a single patient and may cause the patient to resist the detection process. During the strabismus detection process, the doctor needs to hold the three-prism with one hand and the light source with the other hand. In the process of measuring the distance and degree of strabismus, the patient or family member needs to assist in placing the three-prism, which cannot achieve standardization of position and angle, resulting in inaccurate detection results and affecting the development of subsequent diagnosis and treatment plans and the health of the patient.

[0004] Therefore, a three-prism strabismus detection device is proposed to solve the above problems. SUMMARY

[0005] In order to make up for the above shortcomings, the present application provides a three-prism strabismus detection device, which aims to improve the problem of disordered storage of three-prisms, inefficient selection and the need for patient or family assistance during the detection process in the prior art.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme: a three-prism strabismus detection device, comprising a base, a bearing tray is rotatably connected in the base, a support shaft is fixedly connected to the base, a first pressing unit and a second pressing unit are slidably connected in the support shaft, a locking assembly is arranged in the first pressing unit, and a third pressing unit is slidably connected in the second pressing unit; a tooth groove and a rotating groove are formed in the bearing tray, and a three-prism seat is slidably connected in the bearing tray.

[0007] Preferably, the first pressing unit comprises a first pressing block, the first pressing block is slidingly connected in a supporting shaft, a sliding cavity is formed in the first pressing block, a locking block and a sliding block are respectively slidingly connected in the sliding cavity, locking springs are fixedly connected in the sliding cavity, and the other end of the sliding block is movably connected in a tooth groove through the supporting shaft; the other end of the locking block is slidingly connected in the second pressing unit through the supporting shaft.

[0008] Preferably, the locking assembly comprises an adjusting block, the adjusting block is rotatably connected in the first pressing block, the adjusting block is sleeved on an adjusting shaft, and an adjusting rod is fixedly connected to the top of the adjusting shaft.

[0009] Preferably, the second pressing unit comprises a second pressing block, a connecting hole and a locking hole are formed in the second pressing block, a rotating block is fixedly connected to the bottom of the second pressing block, and the rotating block is movably connected in a rotating groove; a connecting column is slidingly connected in the connecting hole, a second reset spring is sleeved on the outer wall of the connecting column; and the locking hole is slidingly connected with the locking block.

[0010] Preferably, the third pressing unit comprises a third pressing block, a screw column is movably connected in the third pressing block, the third pressing block is slidingly connected in the second pressing block, a rotating wheel is sleeved on the screw column, a connecting rod is rotatably connected to the rotating wheel, and a pushing block is rotatably connected to the other end of the connecting rod; the pushing block is slidingly connected in a sliding groove, and the sliding groove is formed in the base.

[0011] Preferably, the bottom of the first pressing block, the second pressing block and the third pressing block is fixedly connected with a first reset spring, a second reset spring and a third reset spring, respectively, the other end of the first reset spring and the second reset spring is fixedly connected to the supporting shaft, and the other end of the third reset spring is fixedly connected to the screw column.

[0012] Preferably, the other end of the locking spring is fixedly connected to the locking block and the sliding block, respectively.

[0013] Preferably, one end of the base is fixedly connected with a rotating frame, a rotating ring is rotatably connected in the rotating frame, a triangular prism seat is fixedly connected in the rotating ring, and a triangular prism is fixedly connected in the triangular prism seat.

[0014] Preferably, the top of the first pressing block, the second pressing block and the third pressing block is provided with an auxiliary pressing column.

[0015] Preferably, the two ends of the adjusting block are respectively abutted with the locking block and the sliding block.

[0016] The present application has the following advantages:

[0017] 1、The first lower pressing unit in the application realizes fixed angle rotation of the bearing tray by sliding of the sliding block in the tooth groove, ensures that single back-and-forth sliding of the first lower pressing unit only makes the bearing tray replace a triangular prism seat; at the same time, the locking block is embedded into the locking hole of the second pressing block, the second lower pressing unit is locked to avoid error rotation of the bearing tray caused by misoperation.

[0018] 2、In the application, the second lower pressing unit drives the rotating block to slide along the rotating groove of the bearing tray, which can quickly drive the whole bearing tray to rotate, rapidly position the target triangular prism to a general range, and greatly shorten the initial adjustment time.

[0019] 3、In the application, the triangular prism seat can slide radially along the bearing tray, which facilitates quick replacement of triangular prisms of different specifications without disassembling complex components, and adapts to different degrees of strabismus detection requirements; the rotating ring drives the triangular prism seat to rotate in the vertical plane, which can accurately align the different bases of the triangular prism with the patient's canthus angle or outer canthus angle. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a three-prism strabismus detection device proposed by the application;

[0021] Figure 2 It is a partial cross-sectional view of a three-prism strabismus detection device proposed by the application;

[0022] Figure 3 It is a structure diagram of a bearing tray of a three-prism strabismus detection device proposed by the application;

[0023] Figure 4 It is a partial left view of a three-prism strabismus detection device proposed by the application;

[0024] Figure 5 It is a structure diagram of a locking assembly of a three-prism strabismus detection device proposed by the application;

[0025] Figure 6 It is a structure diagram of a second pressing block of a three-prism strabismus detection device proposed by the application;

[0026] Figure 7 It is a structure diagram of a third pressing block of a three-prism strabismus detection device proposed by the application;

[0027] Figure 8 It is a structure diagram of a light source of a three-prism strabismus detection device proposed by the application;

[0028] LEGEND:

[0029] 1-base; 2-bearing tray; 3-supporting shaft; 4-first pressing unit; 5-second pressing unit; 6-locking assembly; 7-third pressing unit; 8-tooth groove; 9-rotating groove; 10-prism seat; 11-first pressing block; 12-sliding cavity; 13-locking block; 14-sliding block; 15-locking spring; 16-adjusting block; 17-adjusting shaft; 18-adjusting rod; 19-second pressing block; 20-rotating block; 21-connection hole; 22-locking hole; 23-connection column; 24-second return spring; 25-third pressing block; 26-spiral column; 27-rotating wheel; 28-connecting rod; 29-pushing block; 30-sliding groove; 31-first return spring; 32-third return spring; 33-rotating frame; 34-rotating ring. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] With reference to Figures 1 to 3 An embodiment provided by the present application: a prism deviation detection device, the bottom of the device is provided with a base 1, which not only provides stable support for the entire device, but also integrates key rotating and bearing structures inside. A bearing tray 2 is rotatably connected to the inner side of the base 1, which can rotate flexibly inside the base 1 to adjust the angle position of the prism according to the needs during the detection process. Tooth grooves 8 and rotating grooves 9 are formed in the inner wall of the column of the bearing tray 2, which provide guiding and limiting functions for the stable rotation of the bearing tray 2. A prism seat 10 is slidably connected to the inner side of the bearing tray 2, which can slide along the radial direction of the bearing tray 2, facilitating the operator to quickly replace or adjust different specifications of prisms according to the detection needs.

[0032] A supporting shaft 3 is fixedly connected inside the base 1, and a first pressing unit 4 and a second pressing unit 5 are slidably connected inside the supporting shaft 3. The first pressing unit 4 and the second pressing unit 5 can slide up and down along the axis direction of the supporting shaft 3; the inside of the second pressing unit 5 is also slidably connected to a third pressing unit 7, forming a nested structure design.

[0033] With reference to Figures 4 to 5The core component of the first pressing unit 4 is the first pressing block 11, which is in the shape of a cylinder as a whole, and the outer side wall thereof is tightly fitted with the inner side wall of the support shaft 3 to ensure the stability of the first pressing block 11 when sliding in the support shaft 3. The inside of the first pressing block 11 is provided with a transverse sliding cavity 12, the two ends of which extend to the outer side wall and the inner side wall of the first pressing block 11 respectively, and the sliding cavity 12 is provided with two groups of slidable components: one is the locking block 13, and the other is the sliding block 14.

[0034] In the inside of the sliding cavity 12, two locking springs 15 are also fixedly connected, one end of one of the locking springs 15 is fixed on the inner wall of the sliding cavity 12, and the other end is fixedly connected to the end of the locking block 13 to provide the locking block 13 with elastic return force; the other end of the other locking spring 15 is also fixedly connected to the end of the sliding block 14 to provide the sliding block 14 with elastic support. The other end of the locking block 13 passes through the through hole formed in the side wall of the support shaft 3 and is slidingly connected in the second pressing block 19 of the second pressing unit 5 to realize the position locking between the first pressing unit 4 and the second pressing unit 5; the other end of the sliding block 14 passes through the other group of through holes in the side wall of the support shaft 3 and is movably connected in the tooth groove 8 on the surface of the bearing tray 2, and when the sliding block 14 is embedded in the tooth groove 8, the fixed angle rotation of the bearing tray 2 can be realized to facilitate the operator to select the appropriate triangular prism.

[0035] The first pressing unit 4 is also provided with a locking assembly 6 for controlling the locking state, the core of which is the adjusting block 16, which is rotatably connected to the inside of the first pressing block 11 through a rotating shaft, and the adjusting block 16 is tightly sleeved on the adjusting shaft 17 to ensure that the adjusting shaft 17 can drive the adjusting block 16 to rotate synchronously when rotating. The top of the adjusting shaft 17 extends upward through the top end face of the first pressing block 11 and is fixedly connected with the adjusting rod 18, and the operator can drive the adjusting shaft 17 and the adjusting block 16 to rotate synchronously by rotating the adjusting rod 18, thereby controlling the sliding state of the locking block 13 and the sliding block 14 in the sliding cavity 12, and realizing the opening and closing of the locking function; in order to ensure the position fixation of the adjusting rod 18, a fixed pin can be arranged in the adjusting rod 18, the bottom of the fixed pin can be inserted into the pin hole prearranged in the end of the first pressing block 11 to realize the position fixation of the adjusting rod 18, thereby ensuring the stability of the locking state.

[0036] Reference Figure 6The main part of the second pressing unit 5 is a second pressing block 19, which is also in a cylindrical structure and is in sliding fit with the inner side wall of the supporting shaft 3. A plurality of locking holes 22 are formed in the side wall of the second pressing block 19, and the locking holes 22 correspond to the positions of the locking blocks 13 in the first pressing unit 4. When the second pressing unit 5 slides to a specific position, the locking blocks 13 can be inserted into the locking holes 22, thereby realizing the relative fixation of the first pressing unit 4 and the second pressing unit 5 and ensuring that the second pressing unit 5 will not rotate when the bearing tray 2 rotates at a fixed angle under the action of the first pressing unit 4 and the tooth groove 8. A plurality of connecting holes 21 are formed in the bottom of the second pressing block 19, and the connecting holes 21 are formed along the axial direction of the second pressing block 19. A connecting column 23 is slidably connected in the connecting holes 21, and the outer side wall of the connecting column 23 is tightly fitted with the inner side wall of the connecting holes 21, thereby ensuring the stability of the second pressing block 19 when it slides. A second return spring 24 is further sleeved on the outer wall of the connecting column 23, one end of the second return spring 24 is fixedly connected to the supporting shaft 3, and the other end is fixedly connected to the bottom of the second pressing block 19, thereby providing the connecting column 23 with elastic return force. When the connecting column 23 is pushed by external force, the second return spring 24 can drive the connecting column 23 to automatically return.

[0037] Reference Figure 7 The core part of the third pressing unit 7 is a third pressing block 25, and the outer side wall of the third pressing block 25 is in sliding fit with the inner side wall of the second pressing block 19 and can slide up and down along the axial direction of the second pressing block 19. A spiral column 26 is movably connected in the third pressing block 25, a spiral groove is formed in the outer side wall of the spiral column 26, and a spiral protrusion matched with the spiral groove is arranged in the third pressing block 25. The relative movement between the spiral column 26 and the third pressing block 25 is realized through threaded transmission. A rotating wheel 27 is fixedly sleeved at the bottom of the spiral column 26, a connecting rod 28 is rotatably connected to the rotating wheel 27, one end of the connecting rod 28 is rotatably connected to the rotating wheel 27 through a pin shaft, and the other end is rotatably connected to a pushing block 29 through a pin shaft. The pushing block 29 is slidably connected in a sliding groove 30 formed in the inside of the base 1, and the sliding groove 30 provides a guide function for the sliding of the pushing block 29. When the rotating wheel 27 rotates with the spiral column 26, the pushing block 29 can slide back and forth along the sliding groove 30 through the connecting rod 28, thereby realizing the sliding of the triangular prism seat 10 in the base 1.

[0038] The auxiliary pressing column is fixedly arranged at the top of the first pressing block 11, the second pressing block 19 and the third pressing block 25, and an operator can press the auxiliary pressing column to conveniently control the up-down sliding of the first pressing block 11, the second pressing block 19 and the third pressing block 25, thereby improving the comfort and accuracy of operation. The first reset spring 31 and the third reset spring 32 are fixedly connected to the bottom of the first pressing block 11 and the third pressing block 25 respectively, one end of the first reset spring 31 is fixedly connected to the support shaft 3 vertically downward, and the other end of the third reset spring 32 is fixedly connected to the screw column 26, so that the first reset spring 31 and the third reset spring 32 can drive the first pressing block 11 and the third pressing block 25 to automatically reset upward and return to the initial position.

[0039] The rotating frame 33 is further fixedly connected to one end of the base 1, the rotating ring 34 is rotatably connected to the rotating frame 33, and the fixed base is arranged in the rotating ring 34. When the push block 29 pushes the triangular prism seat 10 to slide to the end of the sliding groove 30, the operator can take down the triangular prism seat 10 and place it on the fixed base, and the rotating ring 34 can drive the fixed base to rotate in the vertical plane, so that different bases of the triangular prism are close to the internal canthus or the external canthus of the patient.

[0040] Reference Figure 8 As an optimization scheme of the embodiment of the application, the light source is further fixedly connected to the side of the base 1 away from the rotating frame 33 through the electric push rod, the light source can be pushed by the electric push rod to measure the strabismus angle under different viewing distances by different distances of the light source. If the light path of the light source is blocked by the bearing tray 2, the base 1 can be rotated by a certain angle, and the connection mode of the rotating frame 33 and the base 1 is changed to hinged connection, so as to ensure that the light path of the light source is not blocked. In order to ensure that the triangular prism seat 10 does not slide out along the radial direction of the bearing tray 2 when the bearing tray 2 rotates, a buckle type hinged device or other components can be arranged on the edge of the radial sliding path of the bearing tray 2 to prevent the triangular prism seat 10 from sliding out.

[0041] Working principle: the operator rotates the adjusting rod 18 to drive the adjusting block 16 to rotate synchronously; the adjusting block 16 generates a lateral thrust on the sliding block 14 in the sliding cavity 12 of the first pressing block 11, so that one end of the sliding block 14 protrudes through the side wall through hole of the support shaft 3 and is embedded in the tooth groove 8 of the bearing tray 2. At this time, the auxiliary pressing column at the top of the first pressing block 11 is pressed down, the sliding block 14 slides along the tooth groove 8, thereby driving the bearing tray 2 to make fixed-angle step rotation, realizing the switching of a single triangular prism; at the same time, the adjusting block 16 synchronously drives the locking block 13 to protrude and slide into the locking hole 22 of the second pressing block 19, limiting the up-down sliding of the second pressing block 19 along the support shaft 3, avoiding the unexpected rapid rotation of the bearing tray 2 in the fine adjustment process, and ensuring the stability of angle adjustment.

[0042] When the three-prism needs to be quickly adjusted, the adjusting rod 18 is rotated to reverse the rotation of the adjusting block 16, the pushing force of the adjusting block 16 on the locking block 13 disappears, the locking block 13 is retracted under the pushing force of the locking spring 15 in the sliding cavity 12, and the locking hole 22 of the second pressing block 19 is disengaged. At this time, the auxiliary pressing column of the second pressing block 19 can be pressed down, the bearing tray 2 is driven to slide along the rotating groove 9 of the base 1, the bearing tray 2 is quickly rotated, and the three-prism is quickly switched to a target range; when the three-prism reaches the appropriate range, the adjusting rod 18 is reversely rotated, the adjusting block 16 re-pushes the locking block 13 to extend and be clamped into the locking hole 22 of the second pressing block 19, the second pressing block 19 is locked and cannot slide, and the position of the bearing tray 2 is fixed, and the coarse positioning is completed.

[0043] After selecting the target three-prism, the auxiliary pressing column at the top of the third pressing block 25 is pressed, the third pressing block 25 slides downward along the inner wall of the second pressing block 19; the screw protrusions in the third pressing block 25 are in threaded engagement with the screw grooves of the screw column 26, the axial linear motion of the third pressing block 25 is converted into the circumferential rotation of the screw column 26. The screw column 26 drives the fixed rotating wheel 27 at the bottom to rotate synchronously, the rotating wheel 27 pulls the connecting rod 28 through the pin shaft, and the connecting rod 28 further pushes the pushing block 29 to do linear motion along the sliding groove 30 of the base 1 (the sliding groove 30 provides stable guidance for the pushing block 29 to avoid deviation); the pushing block 29 is clamped with the bottom of the three-prism seat 10, and finally pushes the three-prism seat 10 to slide radially along the bearing tray 2 to the detection position required, so as to ensure that the distance between the three-prism and the patient's eye is adapted.

[0044] Finally, it should be noted that: the above is only the preferred embodiment of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A prism strabismus detection device, comprising a base (1), characterized in that: The base (1) is rotatably connected to a bearing tray (2), and a support shaft (3) is fixedly connected to the base (1). A first pressing unit (4) and a second pressing unit (5) are slidably connected in the support shaft (3). A locking component (6) is provided in the first pressing unit (4), and a third pressing unit (7) is slidably connected in the second pressing unit (5). The bearing tray (2) is provided with a toothed groove (8) and a rotating groove (9), and a prism seat (10) is slidably connected in the bearing tray (2). The first pressing unit (4) includes a first pressing block (11), which is slidably connected to the support shaft (3). A sliding cavity (12) is provided in the first pressing block (11). A locking block (13) and a sliding block (14) are slidably connected in the sliding cavity (12). A locking spring (15) is fixedly connected in each of the sliding cavities (12). The other end of the sliding block (14) passes through the support shaft (3) and is movably connected in the tooth groove (8). The other end of the locking block (13) passes through the support shaft (3) and is slidably connected in the second pressing unit (5). The locking assembly (6) includes an adjusting block (16), which is rotatably connected to the first pressing block (11), and the two ends of the adjusting block (16) abut against the locking block (13) and the sliding block (14) respectively.

2. The prism strabismus detection device according to claim 1, characterized in that: The adjusting block (16) is sleeved on the adjusting shaft (17), and the top of the adjusting shaft (17) is fixedly connected to the adjusting rod (18).

3. The prism strabismus detection device according to claim 1, characterized in that: The second pressing unit (5) includes a second pressing block (19), which has a connecting hole (21) and a locking hole (22). A rotating block (20) is fixedly connected to the bottom of the second pressing block (19), and the rotating block (20) is movably connected to the rotating groove (9). A connecting column (23) is slidably connected in the connecting hole (21), and a second reset spring (24) is sleeved on the outer wall of the connecting column (23). A locking block (13) is slidably connected in the locking hole (22).

4. The prism strabismus detection device according to claim 1, characterized in that: The third pressing unit (7) includes a third pressing block (25), a spiral column (26) is movably connected inside the third pressing block (25), and the third pressing block (25) is slidably connected inside the second pressing block (19). A rotating wheel (27) is sleeved on the spiral column (26), and a connecting rod (28) is rotatably connected on the rotating wheel (27). A push block (29) is rotatably connected to the other end of the connecting rod (28). The push block (29) is slidably connected inside the sliding groove (30), and the sliding groove (30) is opened inside the base (1).

5. The prism strabismus detection device according to claim 1, characterized in that: The bottom of the first pressure block (11), the second pressure block (19) and the third pressure block (25) are respectively fixedly connected to the first reset spring (31), the second reset spring (24) and the third reset spring (32). The other ends of the first reset spring (31) and the second reset spring (24) are fixedly connected to the support shaft (3), and the other end of the third reset spring (32) is fixedly connected to the spiral column (26).

6. The prism strabismus detection device according to claim 1, characterized in that: The other end of the locking spring (15) is fixedly connected to the locking block (13) and the sliding block (14).

7. The prism strabismus detection device according to claim 1, characterized in that: One end of the base (1) is fixedly connected to a rotating frame (33), a rotating ring (34) is rotatably connected inside the rotating frame (33), a prism seat (10) is fixedly connected inside the rotating ring (34), and a prism is fixedly connected inside the prism seat (10).

8. The prism strabismus detection device according to claim 1, characterized in that: The top of the first pressing block (11), the second pressing block (19) and the third pressing block (25) are all provided with auxiliary pressing posts.

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