Chin rest for an optometer

Abstract

The utility model belongs to optometry appearance technical field, especially point to a chin prop device of optometry appearance, including the support base plate of fixed optometry appearance assembly, support base plate is provided with lifting sleeve, buffer seat and lifting motor, and the support base plate between buffer seat and lifting motor is provided with fixed base, and the fixed base is provided with compression spring and position switch for detecting the relative position of fixed base and buffer seat between fixed base and buffer seat, the upper end of lifting sleeve is provided with chin support body, and the upper end of drive screw rotating on buffer seat is screwed with the lower end of lifting sleeve, and the lower end of drive screw is transmissionally connected with the output end of lifting motor. The utility model has the advantages of simple structure, reasonable design and high degree of automation, and the chin support body is driven by lifting sleeve driven by lifting motor to complete automatic lifting, and the chin support body can be accurately detected to prop up the chin of human body, and then the fast and accurate positioning of each measured patient is realized.

Description

Technical Field

[0001] This utility model belongs to the field of optometry technology, and specifically refers to a chin support device for an optometry instrument. Background Technology

[0002] An optometry instrument is a key device in ophthalmology and optometry for visual acuity testing. During its use, the subject needs to place their chin stably on a chin rest to stabilize their head position. The chin rest adjustment mechanism of optometry instruments is mostly manual, meaning the operator manually adjusts the height of the chin rest using knobs, gears, or simple sliding mechanisms to accommodate subjects of different heights. This method is not only cumbersome and inefficient, but also highly dependent on the operator's experience, making it difficult to achieve quick and accurate positioning. Summary of the Invention

[0003] The purpose of this invention is to provide a chin support device for an optometer, which is driven by a lifting motor to lift the chin support body automatically, and can accurately detect when the chin support body is placed on the human chin, thereby achieving rapid and accurate positioning for each patient being tested.

[0004] This utility model is implemented as follows: A chin support device for an optometer includes a support base plate fixed to the optometer assembly. The support base plate has, from top to bottom, a lifting sleeve, a buffer seat, and a lifting motor, all of which are movable relative to the support base plate. The lifting sleeve, buffer seat, and lifting motor are all circumferentially fixed to the support base plate. A fixed seat is provided on the support base plate between the buffer seat and the lifting motor. A compression spring and a position switch for detecting the relative position of the fixed seat and the buffer seat are provided between the fixed seat and the buffer seat. A chin support body is provided at the upper end of the lifting sleeve. The upper end of a drive screw rotating on the buffer seat is threadedly engaged with the lower end of the lifting sleeve. The lower end of the drive screw is connected to the output end of the lifting motor.

[0005] In the chin support device of the above-mentioned optometry instrument, the support base plate is provided with a guide strip hole along the vertical direction, and the outer wall surface of the lifting sleeve is provided with a guide slider that slides in the guide strip hole.

[0006] In the chin support device of the aforementioned optometry instrument, an upper limit switch and a lower limit switch capable of detecting the position of the lifting sleeve are distributed on the support base plate located on one side of the lifting sleeve. The upper limit switch and the lower limit switch form a position travel that limits the vertical position of the lifting sleeve.

[0007] In the chin support device of the aforementioned optometry instrument, the position switch is a Hall effect sensor switch, and both the upper limit switch and the lower limit switch are micro switches.

[0008] In the chin support device of the above-mentioned optometry instrument, the support base plate has a buffer strip hole along the vertical direction. The tail end of the fastening screw passes through the buffer strip hole and is screwed and fixed on the buffer seat. The elastic force of the compression spring can drive the fastening screw to abut against the upper wall of the buffer strip hole.

[0009] In the chin support device of the above-mentioned optometry instrument, buffer guide columns are fixed vertically on the fixed seats on both sides of the drive screw. The buffer seats are slidably fitted on the tops of the two buffer guide columns, and two compression springs are provided and respectively fitted on the two buffer guide columns.

[0010] In the chin support device of the above-mentioned optometry instrument, the support base plate has a limiting groove opened vertically, the lifting motor is fixed on the limiting end plate, and the side edge of the limiting end plate extends outward to form a limiting protrusion that slides in the limiting groove.

[0011] The outstanding advantages of this utility model compared to the prior art are: This utility model has a simple structure, reasonable design and high degree of automation. The lifting sleeve driven by the lifting motor moves the chin support body to complete the automatic lifting and lowering. It can accurately detect when the chin support body is supporting the human chin, thereby achieving fast and accurate positioning for each patient being tested. Attached Figure Description

[0012] Figure 1 The overall three-dimensional structure of this utility model Figure 1 ; Figure 2 The overall three-dimensional structure of this utility model Figure 2 .

[0013] In the diagram: 1. Support base plate; 2. Lifting sleeve; 3. Buffer seat; 4. Lifting motor; 5. Fixed seat; 6. Compression spring; 7. Position switch; 8. Chin support body; 9. Drive screw; 10. Guide bar hole; 11. Guide slider; 12. Upper limit switch; 13. Lower limit switch; 14. Fastening screw; 15. Limit slot; 16. Limit end plate; 17. Limit protrusion. Detailed Implementation

[0014] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —2: A chin support device for an optometer includes a support base plate 1 fixed to the optometer assembly. The support base plate 1 is provided with a lifting sleeve 2, a buffer seat 3, and a lifting motor 4, all of which can move up and down relative to the support base plate 1 from top to bottom. The lifting sleeve 2, the buffer seat 3, and the lifting motor 4 are all circumferentially fixed to the support base plate 1. A fixed seat 5 is provided on the support base plate 1 between the buffer seat 3 and the lifting motor 4. A compression spring 6 and a position switch 7 for detecting the relative position of the fixed seat 5 and the buffer seat 3 are provided between the fixed seat 5 and the buffer seat 3. A chin support body 8 is provided at the upper end of the lifting sleeve 2. The upper end of the drive screw 9 rotating on the buffer seat 3 is threadedly engaged with the lower end of the lifting sleeve 2. The lower end of the drive screw 9 is connected to the output end of the lifting motor 4.

[0015] The lifting motor 4 drives the lifting sleeve 2 to move up and down by rotating the lead screw 9. When the lifting sleeve 2 moves the chin support 8 upward until it rests against the chin of the user, the reaction force of the chin causes the buffer seat 3 to move downward to approach the fixed seat 5. At this point, the position switch 7 detects the buffer seat 3, and the lifting motor 4 immediately stops working. Both the position switch 7 and the lifting motor 4 are electrically connected to the control assembly, which controls the opening and closing state of the lifting motor 4 based on the signal from the position switch 7.

[0016] This utility model has a simple structure, reasonable design and high degree of automation. The lifting motor 4 drives the lifting sleeve 2 to automatically lift the chin support 8 and can accurately detect when the chin support 8 is supporting the human chin, thereby achieving fast and accurate positioning for each patient being tested.

[0017] Furthermore, in order to keep the lifting sleeve 2 and the supporting base plate 1 circumferentially fixed, the supporting base plate 1 is provided with a guide strip hole 10 along the vertical direction, and a guide slider 11 is provided on the outer wall surface of the lifting sleeve 2, which is slidably engaged in the guide strip hole 10. That is, by means of the relative positional engagement between the guide strip hole 10 and the guide slider 11, the lifting sleeve 2 and the supporting base plate 1 can be circumferentially fixed.

[0018] To limit the vertical movement of the lifting sleeve 2 and prevent interference with other parts during its movement, an upper limit switch 12 and a lower limit switch 13 are distributed vertically on the support base plate 1 on one side of the lifting sleeve 2. These upper and lower limit switches 12 and 13 form a position travel that limits the vertical position of the lifting sleeve 2. Both the upper and lower limit switches 12 and 13 are electrically connected to the control assembly, which controls the opening and closing of the lifting motor 4 based on the signals from the upper or lower limit switches 12 and 13.

[0019] In this embodiment, the position switch 7 is a Hall effect sensor switch, and the upper limit switch 12 and lower limit switch 13 are both micro switches. Of course, the position switch 7, upper limit switch 12, and lower limit switch 13 can also be other common position sensing elements.

[0020] Furthermore, the specific structure for the relative vertical movement and circumferential fixation of the buffer seat 3 on the supporting base plate 1 is as follows: the supporting base plate 1 has a buffer strip hole along the vertical direction, the tail end of the fastening screw 14 passes through the buffer strip hole and is screwed and fixed on the buffer seat 3, and the elastic force of the compression spring 6 can drive the fastening screw 14 to abut against the upper wall of the buffer strip hole.

[0021] In order to enable the buffer seat 3 to move up and down stably, buffer guide columns are fixed vertically on the fixed seats 5 located on the left and right sides of the drive screw 9. The buffer seat 3 is slidably fitted on the top of the two buffer guide columns, and two compression springs 6 are provided and respectively fitted on the two buffer guide columns.

[0022] Meanwhile, the specific structure of the relative vertical movement and circumferential fixation of the lifting motor 4 on the supporting base plate 1 is as follows: the supporting base plate 1 has a limiting groove 15 opened vertically, the lifting motor 4 is fixed on the limiting end plate 16, and the side edge of the limiting end plate 16 extends outward to form a limiting protrusion 17 that slides in the limiting groove 15.

[0023] In addition, it should be emphasized that the specific structure of the relative vertical movement and circumferential fixation of the lifting sleeve 2, buffer seat 3 and lifting motor 4 on the supporting base plate 1 can also be achieved by using existing common slide rail structures.

[0024] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A chin support device for an optometer, characterized in that: The device includes a support base plate (1) fixed on the optometry assembly. The support base plate (1) is provided with a lifting sleeve (2), a buffer seat (3), and a lifting motor (4) that can move up and down relative to the support base plate (1) from top to bottom. The lifting sleeve (2), the buffer seat (3), and the lifting motor (4) are all fixed to the support base plate (1) in the circumferential direction. A fixed seat (5) is provided on the support base plate (1) between the buffer seat (3) and the lifting motor (4). A compression spring (6) and a position switch (7) for detecting the relative position of the fixed seat (5) and the buffer seat (3) are provided between the fixed seat (5) and the buffer seat (3). A chin support body (8) is provided at the upper end of the lifting sleeve (2). The upper end of the drive screw (9) rotating on the buffer seat (3) is threadedly engaged with the lower end of the lifting sleeve (2). The lower end of the drive screw (9) is connected to the output end of the lifting motor (4).

2. The chin support device for an optometer according to claim 1, characterized in that: The supporting base plate (1) has a guide bar hole (10) in the vertical direction, and the outer wall surface of the lifting sleeve (2) is provided with a guide slider (11) that slides in the guide bar hole (10).

3. The chin support device for an optometer according to claim 1, characterized in that: The support base plate (1) located on one side of the lifting sleeve (2) has an upper limit switch (12) and a lower limit switch (13) that can detect the position of the lifting sleeve (2). The upper limit switch (12) and the lower limit switch (13) form a position travel that limits the vertical position of the lifting sleeve (2).

4. The chin support device for an optometer according to claim 3, characterized in that: The position switch (7) is a Hall effect sensor switch, and the upper limit switch (12) and the lower limit switch (13) are both micro switches.

5. The chin support device for an optometer according to claim 1, characterized in that: The support base plate (1) has a buffer strip hole along the vertical direction. The tail end of the fastening screw (14) passes through the buffer strip hole and is screwed and fixed on the buffer seat (3). The elastic force of the compression spring (6) can drive the fastening screw (14) to abut against the upper wall of the buffer strip hole.

6. The chin support device for an optometer according to claim 1, characterized in that: The fixed seats (5) on the left and right sides of the drive screw (9) are each fixed vertically with buffer guide columns. The buffer seat (3) is slidably fitted on the top of the two buffer guide columns. The compression spring (6) is provided in two parts and is respectively fitted on the two buffer guide columns.

7. The chin support device for an optometer according to claim 1, characterized in that: The supporting base plate (1) has a limiting groove (15) in the vertical direction. The lifting motor (4) is fixed on the limiting end plate (16). The side edge of the limiting end plate (16) extends outward to form a limiting protrusion (17) that slides in the limiting groove (15).

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