Ophthalmic examination stand for an ophthalmic examination apparatus

Abstract

This utility model relates to an ophthalmic examination bracket for an ophthalmic examination instrument, addressing the technical problem of existing similar products where it is difficult to manually adjust and operate the corresponding eyepiece after it is aligned with the instrument lens. The bracket includes a locking base, a hand-cranked lifting mechanism, a rotating mechanism, and a lens holder. One opening of the locking base is inserted into the edge of the base or a tubular component of the ophthalmic examination instrument. The key feature is that one end of the arm of the hand-cranked lifting mechanism is fixed to the toothed rod of the locking base for vertical adjustment. One end of the rotating mechanism is fixed to the other end of the arm of the hand-cranked lifting mechanism for horizontal rotation. Simultaneously, the electric push rod of the rotating mechanism drives the lens holder, which is hinged to the other end of the rotating mechanism, for vertical adjustment. One opening of the second hinge seat of the rotating mechanism is hinged to one end of the lens holder's steering knuckle for horizontal rotation, and the other end of the lens holder's steering knuckle is hinged to both ends of the U-shaped opening of the lens holder for vertical adjustment.

Description

Technical Field

[0001] This utility model relates to an auxiliary component of an ophthalmic examination instrument, specifically an ophthalmic examination support for such an instrument. Background Technology

[0002] Ophthalmic examination instruments are a general term for ophthalmic examination equipment. Depending on their function and purpose, they include retinoscopes, corneal topography instruments, anterior segment cameras, and reading detectors. Most ophthalmic examination instruments require a bracket or clamp to hold and fix the head in place for ease of use and examination. However, as disclosed in Chinese patent literature (application publication number CN120130923A, publication date June 13, 2025, utility model title "A Multi-Degree-of-Freedom Quick-Release Adjustable Bracket for Ophthalmic Examination Lenses"), the connecting rods of this product achieve linkage and manual operation through a ball joint and connecting rod hinge principle. This operation is relatively inconvenient, especially when the above product and similar products are installed at the rear of the base of an ophthalmic examination instrument, where the extended stroke further complicates operation. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide an ophthalmic examination bracket for an ophthalmic examination instrument, thereby solving the technical problem that manual operation of existing similar products is inconvenient, especially the difficulty in manually adjusting and operating the corresponding eyepiece to one side of the instrument lens. This objective is achieved through the following technical solution.

[0004] An ophthalmic examination stand for an ophthalmic examination instrument includes a locking base, a hand-cranked lifting mechanism, a rotating mechanism, and a lens holder. The locking base is locked to the base or guardrail of the ophthalmic examination instrument via a locking lever inserted into an opening on one side of the base's bottom and a locking block at the end of the locking lever within the opening. A tube at the edge of the base or guardrail of the ophthalmic examination instrument is inserted into the opening on one side of the base. Key structural design features a toothed support rod with teeth on one side at the top center of the support. An arm seat is located on the toothed section of the support rod. One side of a gear within the arm seat meshes with the teeth of the toothed support rod, and the other side of the gear meshes with a screw screwed into a crank handle within the arm seat. The center of the gear is fixed to a gear groove in the opening on one side of the arm seat via a pin. An extended arm is located on one side of the arm seat, with a rod seat at the top of the arm's end that fits into a rotating boss. An electric push rod and a first diagonal brace are located above the arm of the arm seat. One end of the electric push rod and the first diagonal brace is hinged and fixed to the first hinge seat, which is fixedly mounted on the rod seat. The other end of the electric push rod and the first diagonal brace is hinged and fixed to one end of the second hinge seat. The other end of the second hinge seat has a slot with one end of a steering knuckle hinged and fixed in the slot. The other end of the steering knuckle is hinged and fixed to a lens mount. The lens mount is provided at the end of the lens mount above the arm seat. The lens mount has three wheel sleeve seats that are equidistantly distributed in a triangular pattern. The shaft of the wheel sleeve seat is connected to one end of the wheel axle of the adjusting wheel. The ball sleeve at the other end of the wheel axle is fitted with the ball head of the ball rod at the bottom of the lens mount cover. The top center of the lens mount cover is connected to the lens clamp through a shaft cylinder assembly. The fine adjustment mechanism composed of the ball rod and the adjusting wheel adjusts the different angles of the shaft cylinder assembly by pushing out and retracting between the ball head of the ball rod and the ball sleeve of the adjusting wheel. A protective eyepiece is provided on one side of the lens clamp by tilting the rod body. The electric push rod is connected to the controller of the ophthalmic examination instrument through a circuit. After confirming the working height of the arm mount by manually cranking the lifting mechanism, the electric push rod of the rotating mechanism automatically adjusts the working height of the lens bracket. By manually adjusting the angle and height of the arm mount and lens bracket through the lens bracket, the corresponding adjustment wheel can be rotated to further fine-tune the eye shield to block the non-examined eye in front of the examiner, so that the examiner's other eye can be aligned with the lens of the ophthalmic examination instrument for examination.

[0005] The arm of the hand-cranked lifting mechanism is fixed at one end to the toothed bracket of the locking base for vertical adjustment. The rod at one end of the rotating mechanism is fixed to the arm of the hand-cranked lifting mechanism and rotates horizontally. Simultaneously, the electric push rod of the rotating mechanism drives the lens bracket, hinged to the other end of the rotating mechanism, to adjust vertically. One side of the second hinge seat of the rotating mechanism is hinged to one end of the lens bracket's steering knuckle for horizontal rotation, while the other end of the lens bracket's steering knuckle is hinged to both ends of the U-shaped opening of the lens bracket for vertical adjustment. This allows for three-dimensional angle adjustment of the eyepiece at the lens bracket.

[0006] The shaft cylinder assembly includes a spring seat, a mirror shaft, a plug sleeve, a shaft cylinder, a spring head, and a spring. The top center of the mirror seat cover is provided with a spring seat, which is fitted onto one end of the shaft cylinder. The other end of the shaft cylinder is provided with a mirror shaft. A mirror clamp, which is integrated with the mirror shaft, has a protective eyepiece fixed on one side of its rod body by a clamp at its end. The end of the mirror shaft, which is inserted into the shaft cylinder, abuts against the spring seat in sequence through the plug sleeve, spring head, and spring.

[0007] The electric push rod is provided with a second inclined brace above it. The two ends of the second inclined brace are respectively hinged and fixed to the first hinge seat and the second hinge seat. The electric push rod is wrapped and hidden in the rod groove formed by stamping on the opposite side of the first and second inclined braces.

[0008] The first hinge seat has three hinge positions arranged in a triangle. One end of the first and second diagonal braces are respectively hinged and fixed to the upper and lower hinge positions of the first hinge seat. Simultaneously, the three hinge positions of the first hinge seat are correspondingly hinged and fixed to hinge points within the hinge slots on one side of the rod seat. The middle hinge position of the first hinge seat facing the lens bracket is hinged to one end of the electric push rod. The other end of the electric push rod and the other end of the second diagonal brace are simultaneously connected and fixed to the upper hinge position of the second hinge seat. The other end of the first diagonal brace is connected and fixed to the lower hinge position of the second hinge seat. The above describes the specific hinge structure between the hand-cranked lifting mechanism, the rotating mechanism, and the lens bracket, particularly the specific hinge method at the rotating mechanism.

[0009] A rotary motor is installed at the rotating boss of the arm mount. The motor shaft of the rotary motor is fitted into the rod mount. A joint motor is installed at the hinge pin of the lens mount and the steering knuckle. The wheel mounts are replaced with micro motors. An eye position sensor is installed at the center of the eye-side end of the eye shield. The eye position sensor, micro motor, joint motor, and rotary motor are connected to the controller of the ophthalmic examination instrument via wiring. Thus, the rotary motor, joint motor, and micro motor, in conjunction with the electric push rod, achieve automatic adjustment of the eye shield.

[0010] This utility model has a reasonable structural design, is convenient to manufacture, assemble and use, has low production cost, and is applicable to a wide range of ophthalmic examination instruments; it is suitable for use as an ophthalmic examination support for ophthalmic examination instruments, and for further improvement of similar products. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model in use.

[0012] Figure 2 yes Figure 1 The diagram shows the exploded structure of the frame, with part A framed in the diagram.

[0013] Figure 3 yes Figure 2 Enlarged view of part A.

[0014] Figure 4 yes Figure 1 A cross-sectional structural diagram of the frame.

[0015] Figure 5 yes Figure 4 A schematic diagram of the sectional structure of the left side, with part B outlined in the diagram.

[0016] Figure 6 yes Figure 5 Enlarged view of part B.

[0017] Figure 7 yes Figure 4 A top-down structural diagram, with section C outlined in the diagram.

[0018] Figure 8 yes Figure 7 Enlarged and partially sectional structural diagram of section C.

[0019] Attached Figures and Their Names: 1. Ophthalmic Examination Instrument; 101. Guardrail Frame; 2. Frame Body; 3. Lock Button; 4. Lock Block; 5. Frame Base; 6. Toothed Frame Rod; 7. Gear; 8. Crank Handle; 9. Arm Seat; 901. Arm Rod; 902. Rotating Boss; 10. First Diagonal Brace; 11. Rod Seat; 12. First Hinge Seat; 13. Electric Push Rod; 14. Second Diagonal Brace; 15. Second Hinge Seat; 16. Steering Knuckle; 17. Lens Mount; 18. Lens Mount; 19. Wheel Sleeve Seat; 20. Adjusting Wheel; 21. Lens Mount Cover; 22. Spring; 23. Spring Head; 24. Shaft Cylinder; 25. Plug Sleeve; 26. Lens Axis; 27. Lens Hoop; 2701. Rod Body; 2702. Clamp; 28. Eye Block; 29. ​​Spring Seat; 30. Ball Bearing Rod. Implementation

[0020] The structure and use of this utility model will now be further described with reference to the accompanying drawings. Figures 1-8As shown, the frame 2 of the ophthalmic examination stand includes a locking base, a hand-cranked lifting mechanism, a rotating mechanism, and a lens holder. The locking base of the frame is locked and fixed to the base or guardrail 101 of the ophthalmic examination instrument 1 by a locking rod at a locking button 3 extending into an opening on one side of the bottom of the frame 5 and a locking block 4 at the end of the locking rod in the opening. The opening on one side of the frame is inserted into the tube at the edge of the base or guardrail of the ophthalmic examination instrument. A toothed frame rod 6 with teeth on one side is provided in the middle of the top of the frame. An arm seat 9 is provided in the toothed section of the toothed frame rod. One side of the gear 7 in the arm seat meshes with the teeth of the toothed frame rod, and the other side of the gear in the arm seat meshes with the screw screwed into the crank handle 8 in the arm seat. The center of the gear is fixed in the gear groove in the opening on one side of the arm seat by a pin. One side of the arm base is provided with an extended arm 901. The top of the end of the arm is provided with a rod seat 11 into which a rotating boss 902 is fitted. Above the arm of the arm base, there is an electric push rod 13 and a first diagonal brace 10. One end of the electric push rod and the first diagonal brace is hinged and fixed to a first hinge seat 12. The first hinge seat is fixedly set on the rod base. The other end of the electric push rod and the first diagonal brace is hinged and fixed to one end of a second hinge seat 15. The other end of the second hinge seat has a slot in which a steering knuckle 16 is hinged and fixed. The other end of the steering knuckle is hinged and fixedly provided with a lens holder 17. The lens mount 18 is located at the end of the lens holder above the arm. The lens mount has three wheel sleeve seats 19 that are equidistantly distributed in a triangular pattern. The axle of each wheel sleeve seat is connected to one end of the axle of the adjusting wheel 20. The ball sleeve at the other end of the axle is fitted with the ball head of the ball rod 30 at the bottom of the lens mount cover 21. The top center of the lens mount cover is connected to the lens clamp 27 through the shaft cylinder assembly. The fine adjustment mechanism composed of the ball rod and the adjusting wheel adjusts the different angles of the shaft cylinder assembly by pushing out and retracting between the ball head of the ball rod and the ball sleeve of the adjusting wheel. A lens guard 28 is provided on one side of the lens clamp by tilting up and extending through the rod body 2701. The electric push rod is connected to the controller of the ophthalmic examination instrument through a circuit.

[0021] The arm seat of the aforementioned hand-cranked lifting mechanism is fixed at one end to the toothed bracket of the locking base for vertical adjustment. The rod seat at one end of the rotating mechanism is fixed to the arm seat of the hand-cranked lifting mechanism and rotates horizontally. At the same time, the electric push rod of the rotating mechanism drives the lens bracket, which is hinged and fixed at the other end of the rotating mechanism, to adjust vertically. The opening on one side of the second hinge seat of the rotating mechanism is hinged to one end of the steering knuckle of the lens bracket for horizontal rotation, and the other end of the steering knuckle of the lens bracket is hinged to both ends of the U-shaped opening of the lens bracket for vertical adjustment.

[0022] The aforementioned shaft cylinder assembly includes a spring seat 29, a mirror shaft 26, a plug sleeve 25, a shaft cylinder 24, a spring head 23, and a spring 22. A spring seat is located at the center of the top of the mirror base cover. The spring seat is fitted onto one end of the shaft cylinder, and the other end of the shaft cylinder has a mirror shaft. A mirror clamp, integrally connected to the mirror shaft, has a baffle 28 fixed to one side of its rod body via a clamp 2702 at its end. The end of the mirror shaft, inserted into the shaft cylinder, abuts against the spring seat via the plug sleeve, spring head, and spring in sequence. A second diagonal brace 14 is located above the electric push rod. The two ends of the second diagonal brace are hinged and fixed to the first hinge seat and the second hinge seat, respectively. The electric push rod is concealed within a rod groove formed by stamping on the opposite side of the first and second diagonal braces. The specific connections between the first diagonal brace, the second diagonal brace, and the electric push rod are as follows: The first hinge seat has three hinge positions arranged in a triangle. One end of the first diagonal brace and the second diagonal brace are respectively hinged and fixed to the upper and lower hinge positions of the first hinge seat. At the same time, the three hinge positions of the first hinge seat are correspondingly hinged and fixed to the hinge points in the hinge slots on one side of the rod seat. The middle hinge position of the first hinge seat facing the lens bracket is hinged to one end of the electric push rod. The other end of the electric push rod and the other end of the second diagonal brace are simultaneously connected and fixed to the upper hinge position of the second hinge seat. The other end of the first diagonal brace is connected and fixed to the lower hinge position of the second hinge seat.

[0023] Before use, first adjust the height of the arm base using the crank handle. Position the examinee's chin against the curved section of the guardrail. Press the setting button on the ophthalmic examination instrument's controller. As the lens of the ophthalmic examination instrument moves towards one of the examinee's eyes, the electric push rod on the frame automatically adjusts the height of the lens bracket; that is, the electric push rod controls the up and down height of the lens bracket. Next, manually adjust the angle and position of the lens bracket, and manually adjust the adjustment wheel of the lens bracket until the blocking eye is positioned in front of the examinee's other eye and blocks the line of sight of that eye. Press the start button on the controller, and the ophthalmic examination instrument's lens will begin examining that eye.

[0024] Based on the above structural features, the fully automated improvement of this ophthalmic examination bracket is as follows: a rotary motor is provided at the rotating boss of the arm seat, the motor shaft of the rotary motor is fitted into the rod seat, a joint motor is provided at the hinge pin of the lens holder and the steering knuckle, the wheel sleeve seats are replaced with micro motors, an eye position sensor is provided at the center of the eye side end of the eye shield, and the eye position sensor, micro motor, joint motor and rotary motor are connected to the controller of the ophthalmic examination instrument through wiring; press the setting button in the controller of the ophthalmic examination instrument until the eye shield is in front of the examiner's other eye and blocks the line of sight of that eye, press the start button of the controller, and the lens of the ophthalmic examination instrument can start the examination of that eye.

Claims

1. An ophthalmic examination stand for an ophthalmic examination instrument, the frame (2) of the ophthalmic examination stand comprising a locking base, a hand-cranked lifting mechanism, a rotating mechanism, and a lens support, wherein the locking base of the frame is locked and fixed to the base or guardrail (101) of the ophthalmic examination instrument (1) by a locking rod at a locking button (3) extending into an opening on one side of the bottom of the frame (5) and a locking block (4) at the end of the locking rod in the opening, and a tube at the edge of the base or guardrail of the ophthalmic examination instrument is inserted into an opening on one side of the frame; characterized in that The top center of the frame (5) is provided with a toothed frame rod (6) with a toothed edge on one side. The toothed section of the toothed frame rod is provided with an arm seat (9). One side of the gear (7) in the arm seat meshes with the toothed edge of the toothed frame rod, and the other side of the gear in the arm seat meshes with the screw screwed into the rocker arm (8) in the arm seat. The center of the gear is fixed in the gear groove with an opening on one side of the arm seat by a pin. One side of the arm seat is provided with an extended arm rod (901). The top of the end of the arm rod is provided with a rod seat (11) into which a rotating boss (902) is fitted. Above the arm rod of the arm seat is an electric push rod (13) and a first diagonal brace (10). One end of the electric push rod and the first diagonal brace is hinged and fixed to a first hinge seat (12). The first hinge seat is fixedly set on the rod seat. The other end of the electric push rod and the first diagonal brace is hinged and fixed to one end of a second hinge seat (15). The other end of the second hinge seat has a groove. The internal structure is provided with a steering knuckle (16) with one end hinged and fixed in the slot, and a lens holder (17) is hinged and fixed at the other end of the steering knuckle; a lens holder (18) is provided at the end of the lens holder above the arm seat, and the lens holder is provided with three wheel sleeve seats (19) distributed in a triangular pattern at equal intervals. The shaft of the wheel sleeve seat is connected to one end of the wheel axle of the adjusting wheel (20), and the ball sleeve at the other end of the wheel axle is respectively fitted with the ball head of the ball rod (30) at the bottom of the lens seat cover (21). The top center of the lens seat cover is connected to the lens clamp (27) through the shaft cylinder assembly. The fine adjustment mechanism composed of the ball rod and the adjusting wheel adjusts the different angles of the shaft cylinder assembly by pushing out and retracting between the ball head of the ball rod and the ball sleeve of the adjusting wheel. A lens guard (28) is provided on one side of the lens clamp by tilting out through the rod body (2701). The electric push rod is connected to the controller of the ophthalmic examination instrument (1) through the line.

2. The ophthalmic examination holder for an ophthalmic examination instrument according to claim 1, characterized in that... The arm seat (9) of the hand-cranked lifting mechanism is fixed at one end to the toothed bracket (6) of the locking base and can be adjusted up and down. The rod seat (11) at one end of the rotating mechanism is fixed to the arm seat of the hand-cranked lifting mechanism and rotates horizontally at the other end. At the same time, the electric push rod (13) of the rotating mechanism drives the lens bracket, which is hinged and fixed at the other end of the rotating mechanism, to adjust up and down. The second hinge seat (15) of the rotating mechanism has one side opening that is hinged to one end of the steering knuckle (16) of the lens bracket and rotates horizontally. The other end of the steering knuckle of the lens bracket is hinged to both ends of the U-shaped opening of the lens bracket (17) and can be adjusted up and down.

3. The ophthalmic examination holder for an ophthalmic examination instrument according to claim 1, characterized in that... The shaft assembly includes a spring seat (29), a mirror shaft (26), a plug sleeve (25), a shaft (24), a spring head (23), and a spring (22). The top center of the mirror base cover (21) is provided with a spring seat, which is fitted with one end of the shaft. The other end of the shaft is provided with a mirror shaft. The rod (2701) of the mirror clamp (27) which is integrated with the mirror shaft is fixed with a lens (28) by a clamp (2702) at the end. The end of the mirror shaft inserted into the shaft is abutted against the spring seat by the plug sleeve, spring head, and spring in sequence.

4. The ophthalmic examination holder for an ophthalmic examination instrument according to claim 1, characterized in that... The electric push rod (13) is provided with a second inclined brace (14) above it. The two ends of the second inclined brace are respectively hinged and fixed to the first hinge seat (12) and the second hinge seat (15). The electric push rod is wrapped and hidden in the rod groove formed by stamping on the opposite side of the first inclined brace (10) and the second inclined brace.

5. The ophthalmic examination holder for an ophthalmic examination instrument according to claim 4, characterized in that... The first hinge seat (12) has three hinge positions arranged in a triangle. One end of the first diagonal brace (10) and the second diagonal brace (14) are respectively hinged and fixed to the upper and lower hinge positions of the first hinge seat. At the same time, the three hinge positions of the first hinge seat are correspondingly hinged and fixed to the hinge points in the hinge groove on one side of the rod seat (11). The middle hinge position of the first hinge seat facing the lens bracket is hinged to one end of the electric push rod (13). The other end of the electric push rod and the other end of the second diagonal brace are simultaneously connected and fixed to the upper hinge position of the second hinge seat (15). The other end of the first diagonal brace is connected and fixed to the lower hinge position of the second hinge seat.

6. The ophthalmic examination holder for an ophthalmic examination instrument according to claim 1, characterized in that... A rotary motor is provided at the rotating boss (902) of the arm seat (9), the rod seat (11) is fitted into the motor shaft of the rotary motor, a joint motor is provided at the hinge pin of the lens frame (17) and the steering knuckle (16), the wheel seat (19) is replaced with a micro motor, and an eye position sensor is provided at the center of the eye side end of the eye shield (28). The eye position sensor, micro motor, joint motor and rotary motor are connected to the controller of the ophthalmic examination instrument (1) through the circuit.

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