A visual function testing instrument with diopter adjustment function

Abstract

The utility model relates to visual function detection technical field especially a kind of visual function detection instrument with adjusting eyepiece function, including detection instrument main body, connecting band, support plate, eyepiece and rear brain backplate, the first end of connecting band is fixed on detection instrument main body, the second end of connecting band is fixed on support plate, eyepiece is movably installed on detection instrument main body, first adjusting mechanism for adjusting eyepiece displacement is equipped between eyepiece and detection instrument main body, rear brain backplate is movably installed on support plate, second adjusting mechanism for adjusting rear brain backplate displacement is equipped between rear brain backplate and support plate. Like this setting, when using, according to patient pupillary distance, through first adjusting mechanism for adjusting eyepiece displacement, it can be applicable to the patient use of different pupillary distance, while according to the head circumference size of patient, through second adjusting mechanism for adjusting rear brain backplate displacement, it can be applicable to the patient use of different head circumference, while the comfort degree is higher, and the use effect when patient wears is better.

Description

Technical Field

[0001] This utility model relates to the field of visual function testing technology, and specifically to a visual function testing instrument with a function of adjusting the eyepiece. Background Technology

[0002] Both eye and brain diseases can affect a person's visual function. Visual function testing can reflect a patient's visual ability and provide an objective evaluation of that ability.

[0003] Utility model patent CN209186665U discloses a head-mounted binocular vision function testing instrument, including a processor, memory, housing, and feedback unit. The housing contains a pair of eyepieces, two displays, and an adjustment module. Both the displays and memory are connected to the processor. The housing is divided into two independent chambers by a light-shielding component, with the two displays housed in the two chambers respectively. This prior art displays images from a synoptophore, achieving similar testing functions. The entire testing device is wearable, portable, and not limited by location. Furthermore, its compact size and low manufacturing cost reduce user testing costs. For hospitals, space previously occupied by one synoptophore can now accommodate multiple testing instruments, allowing simultaneous testing of multiple patients and significantly improving efficiency. Doctors' workload is greatly reduced, allowing them to serve multiple patients simultaneously. However, this prior art cannot adjust the eyepiece position according to the patient's interpupillary distance or head circumference, resulting in poor performance.

[0004] Therefore, there is still room for improvement in existing technologies. Utility Model Content

[0005] To address the problem that existing technologies cannot adjust the position of the eyepiece according to the patient's different interpupillary distances or the different head circumferences, resulting in poor performance, this invention proposes a vision function testing instrument with an eyepiece adjustment function.

[0006] To achieve the above objectives, the technical solution applied in this utility model is as follows:

[0007] A visual function testing instrument with an adjustable eyepiece function includes a testing instrument body, a connecting strap, a support plate, an eyepiece, and a headrest. The first end of the connecting strap is fixed to the testing instrument body, and the second end of the connecting strap is fixed to the support plate. The eyepiece is movably mounted on the testing instrument body. A first adjustment mechanism for adjusting the displacement of the eyepiece is provided between the eyepiece and the testing instrument body. The headrest is movably mounted on the support plate. A second adjustment mechanism for adjusting the displacement of the headrest is provided between the headrest and the support plate.

[0008] According to the above scheme, a bent tube is fixed on the main body of the detector, and a reflector is fixed inside the bent tube. The first adjustment mechanism includes a slide tube, a sliding plate, and a bidirectional screw. The first end of the slide tube is fixedly connected to the eyepiece, and the second end of the slide tube is slidably connected to the bent tube. The first end of the sliding plate is fixedly connected to the slide tube, and the second end of the sliding plate is threadedly connected to the bidirectional screw. The bidirectional screw is rotatably mounted on the main body of the detector. A reflector sheet corresponding to the reflector is fixed inside the slide tube.

[0009] According to the above scheme, a bearing seat is fixed on the main body of the detector, a bidirectional screw is rotatably mounted on the bearing seat, and a first guide component is provided between the bearing seat and the slide plate.

[0010] According to the above scheme, the first guide assembly includes a first guide rod disposed on the slide plate and a first guide hole disposed on the bearing seat. The first guide rod is slidably connected to the first guide hole, and the first guide rod is arranged parallel to the bidirectional screw.

[0011] According to the above scheme, a compression spring is sleeved on the first guide rod, with the first end of the compression spring abutting against the bearing seat and the second end of the compression spring abutting against the slide plate.

[0012] According to the above scheme, a knob is fixed on the bidirectional screw, a limit groove is formed on the knob, and a limit block is fixed on the main body of the detector. The limit block and the limit groove cooperate to limit the setting.

[0013] According to the above scheme, the second adjustment mechanism includes a screw, a screw cylinder, and a slide cylinder. The screw passes through the support plate and is threadedly connected to the screw cylinder. The screw cylinder is slidably connected to the slide cylinder. The slide cylinder is fixedly connected to the back of the head support plate. A second guide component is provided between the back of the head support plate and the support plate.

[0014] According to the above scheme, the second guide component includes a second guide rod disposed on the back of the headrest and a second guide hole disposed on the support plate. The second guide rod is slidably connected to the second guide hole, and the second guide rod is arranged parallel to the slide cylinder.

[0015] According to the above scheme, the slide cylinder has an inner cavity formed inside. The first end of the screw cylinder is threadedly connected to the screw rod, and the second end of the screw cylinder is slidably located in the inner cavity. A spring is provided in the inner cavity, with the first end of the spring abutting against the screw cylinder and the second end of the spring abutting against the inner wall of the inner cavity.

[0016] According to the above scheme, a sliding groove communicating with the inner cavity is formed on the side wall of the sliding cylinder, and a sliding pin is fixed on the outer wall of the second end of the screw cylinder, and the sliding pin is slidably connected with the sliding groove.

[0017] The beneficial effects of this utility model are:

[0018] This invention is designed such that, during use, the first adjustment mechanism adjusts the eyepiece displacement according to the patient's interpupillary distance, making it suitable for patients with different interpupillary distances. At the same time, the second adjustment mechanism adjusts the displacement of the posterior headrest according to the patient's head circumference, making it suitable for patients with different head circumferences. It also provides high comfort and better performance for patients. Attached Figure Description

[0019] Figure 1 This is a three-dimensional view of the overall structure of this utility model;

[0020] Figure 2 This is an assembly drawing of the main body and eyepiece of the detector of this utility model;

[0021] Figure 3 yes Figure 2 Enlarged view of position A in the middle;

[0022] Figure 4 This is a cross-sectional view of the assembly of the bend and slide of this utility model;

[0023] Figure 5 This is a cross-sectional view of the screw, screw barrel, and slide barrel assembly of this utility model.

[0024] In the picture:

[0025] 1. Detector body; 11. Eyepiece; 2. Connecting belt; 3. Support plate; 31. Backrest plate; 41. Screw; 42. Screw barrel; 43. Slide barrel; 44. Sliding pin; 45. Spring; 46. Slide groove; 47. Second guide rod; 5. Bend; 51. Reflector; 71. Slide barrel; 72. Knob; 73. Reflector sheet; 74. Slide plate; 75. Bidirectional screw; 76. Limiting block; 77. Bearing seat; 78. First guide rod; 79. Compression spring. Detailed Implementation

[0026] The technical solution of this utility model will be described below with reference to the accompanying drawings and embodiments.

[0027] like Figures 1 to 5As shown, the visual function testing instrument with adjustable eyepiece function of this utility model includes a testing instrument body 1, a connecting strap 2, a support plate 3, an eyepiece 11, and a backrest 31. The first end of the connecting strap 2 is fixed to the testing instrument body 1, and the second end of the connecting strap 2 is fixed to the support plate 3. The eyepiece 11 is movably mounted on the testing instrument body 1, and a first adjustment mechanism for adjusting the displacement of the eyepiece 11 is provided between the eyepiece 11 and the testing instrument body 1. The backrest 31 is movably mounted on the support plate 3, and a second adjustment mechanism for adjusting the displacement of the backrest 31 is provided between the backrest 31 and the support plate 3. With this configuration, during use, the displacement of the eyepiece 11 can be adjusted according to the patient's interpupillary distance through the first adjustment mechanism, making it suitable for patients with different interpupillary distances. At the same time, the displacement of the backrest 31 can be adjusted according to the patient's head circumference through the second adjustment mechanism, making it suitable for patients with different head circumferences. Furthermore, it offers high comfort and provides a better user experience.

[0028] Furthermore, a curved tube 5 is fixed on the main body 1 of the detector, and a reflector 51 is fixed inside the curved tube 5. The first adjustment mechanism includes a sliding tube 71, a sliding plate 74, and a bidirectional screw 75. The first end of the sliding tube 71 is fixedly connected to the eyepiece 11, and the second end of the sliding tube 71 is slidably connected to the curved tube 5. The first end of the sliding plate 74 is fixedly connected to the sliding tube 71, and the second end of the sliding plate 74 is threadedly connected to the bidirectional screw 75. The bidirectional screw 75 is rotatably mounted on the main body 1 of the detector. A reflective sheet 73 corresponding to the reflector 51 is fixed inside the sliding tube 71. With this configuration, when adjusting the displacement of the eyepiece 11, the bidirectional screw 75 and the sliding plate 74 are rotated to cause threaded movement, which causes the sliding plate 74 to drive the sliding tube 71 to move, and the sliding tube 71 to drive the eyepiece 11 to move, thereby adjusting the distance between the reflector 51 and the reflective sheet 73. The light inside the main body 1 is propagated and reflected by the reflector 51 and the reflective sheet 73 and is observed by the patient's eye through the eyepiece 11.

[0029] It should be noted that there are two eyepieces 11, which correspond to the patient's two pupils. Each eyepiece 11 is fixed with a slide plate 74. The two slide plates 74 are threaded to both ends of the bidirectional screw 75. When the bidirectional screw 75 is rotated, the two slide plates 74 are driven to move the two eyepieces 11 to the sides or to the center.

[0030] Furthermore, a bearing seat 77 is fixed on the main body 1 of the detector, and a bidirectional screw 75 is rotatably mounted on the bearing seat 77. A first guide assembly is provided between the bearing seat 77 and the slide plate 74. This arrangement allows the bearing seat 77 to facilitate the rotation of the bidirectional screw 75 on the one hand, and to limit the slide plate 74 on the other hand, preventing the slide plate 74 from detaching from the bidirectional screw 75.

[0031] It should be noted that the sliding plate 74 is in contact with and limited to the surface of the detector body 1, and can only slide relative to the surface of the detector body 1, but cannot rotate relative to the surface of the detector body 1. At the same time, the sliding plate 74 plays a supporting role for the slide tube 71.

[0032] Furthermore, the first guide assembly includes a first guide rod 78 disposed on the slide plate 74 and a first guide hole disposed on the bearing seat 77. The first guide rod 78 is slidably connected to the first guide hole, and the first guide rod 78 is arranged parallel to the bidirectional screw 75. This arrangement enables the slide plate 74 to move horizontally, and the movement process is stable and reliable.

[0033] Furthermore, a compression spring 79 is fitted onto the first guide rod 78. The first end of the compression spring 79 abuts against the bearing seat 77, and the second end of the compression spring 79 abuts against the slide plate 74. With this configuration, after the bidirectional screw 75 rotates and drives the slide plate 74 to any position, the elastic force of the compression spring 79 can provide a thrust to the slide plate 74, preventing the slide plate 74 from rotating relative to the bidirectional screw 75 on its own.

[0034] Furthermore, a knob 72 is fixed to the bidirectional screw 75, and a limiting groove is formed on the knob 72. A limiting block 76 is fixed to the main body 1 of the detector, and the limiting block 76 cooperates with the limiting groove to limit the movement. With this configuration, it is more convenient to rotate the bidirectional screw 75 by the knob 72, and with the limiting block 76 cooperating with the limiting groove to limit the movement, the bidirectional screw 75 always rotates in the same position and will not be displaced.

[0035] Furthermore, the second adjustment mechanism includes a screw 41, a screw cylinder 42, and a slide cylinder 43. The screw 41 passes through the support plate 3 and is threadedly connected to the screw cylinder 42. The screw cylinder 42 is slidably connected to the slide cylinder 43, and the slide cylinder 43 is fixedly connected to the posterior head support plate 31. A second guide assembly is provided between the posterior head support plate 31 and the support plate 3. With this configuration, when adjusting the displacement of the posterior head support plate 31, the screw 41 and screw cylinder 42 are rotated to generate threaded movement. The screw cylinder 42 slides relative to the slide cylinder 43. After sliding to a certain position, it can push the slide cylinder 43 to move the posterior head support plate 31, thereby adjusting the distance between the posterior head support plate 31 and the eyepiece 11, so as to facilitate use by patients with different head circumferences and make adjustment convenient.

[0036] Furthermore, the second guide assembly includes a second guide rod 47 disposed on the backrest plate 31 and a second guide hole disposed on the support plate 3. The second guide rod 47 is slidably connected to the second guide hole, and the second guide rod 47 is arranged parallel to the slide cylinder 43. This arrangement allows the backrest plate 31 to move horizontally, and the movement process is stable and reliable.

[0037] It should be noted that there are multiple second guide rods 47, which are symmetrically arranged on both sides of the slide cylinder 43. In addition to guiding the sliding, they also support the back of the head support plate 31.

[0038] Furthermore, the slide cylinder 43 has an inner cavity formed inside. The first end of the screw cylinder 42 is threadedly connected to the screw 41, and the second end of the screw cylinder 42 slides within the inner cavity. A spring 45 is provided in the inner cavity, with the first end of the spring 45 abutting against the screw cylinder 42 and the second end of the spring 45 abutting against the inner wall of the inner cavity. With this arrangement, by placing the spring 45 between the screw cylinder 42 and the slide cylinder 43, when the screw cylinder 42 slides relative to the slide cylinder 43, the screw cylinder 42 compresses the spring 45, and the spring 45 then elastically compresses the slide cylinder 43, causing the posterior head support plate 31 to shift. Under the action of the spring 45, the posterior head support plate 31 is in an elastically suspended state when worn by the patient, providing a certain cushioning effect. After wearing, the elastic compression of the spring 45 causes the posterior head support plate 31 to fit snugly against the back of the patient's head.

[0039] It should be noted that the surface of the back of the head rest 31 near the eyepiece 11 is curved, which makes it more comfortable to wear.

[0040] Furthermore, the slide cylinder 43 has a groove 46 formed on its side wall that communicates with the inner cavity, and a sliding pin 44 is fixed on the outer wall of the second end of the screw cylinder 42, with the sliding pin 44 slidably connected to the groove 46. With this configuration, when the screw 41 and the screw cylinder 42 undergo threaded movement, the screw cylinder 42 will not rotate synchronously, but can only extend and retract relative to the slide cylinder 43.

[0041] It should be noted that the opening of the eyepiece 11 is provided with an elastic element, which makes it easy for the patient to wear the eyepiece. The elastic element fits against the outer periphery of the patient's eye, providing good sealing, preventing scattering, and ensuring good comfort without injuring the outer periphery of the patient's eye.

[0042] The embodiments of the present utility model have been described above with reference to the accompanying drawings. However, the present utility model is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present utility model without departing from the spirit and scope of the claims. All of these forms are within the scope of protection of the present utility model.

Claims

1. A visual function testing instrument with a function of adjusting the eyepiece, characterized in that: The device includes a main body (1), a connecting strap (2), a support plate (3), an eyepiece (11), and a backrest plate (31). The first end of the connecting strap (2) is fixed to the main body (1), and the second end of the connecting strap (2) is fixed to the support plate (3). The eyepiece (11) is movably mounted on the main body (1) of the detector, and a first adjustment mechanism for adjusting the displacement of the eyepiece (11) is provided between the eyepiece (11) and the main body (1) of the detector; The back of the head support (31) is movably mounted on the support plate (3), and a second adjustment mechanism for adjusting the displacement of the back of the head support (31) is provided between the back of the head support (31) and the support plate (3).

2. The visual function testing instrument with adjustable lens function according to claim 1, characterized in that: A bent tube (5) is fixed on the main body (1) of the detector. A reflector (51) is fixed inside the bent tube (5). The first adjustment mechanism includes a slide tube (71), a slide plate (74), and a bidirectional screw (75). The first end of the slide tube (71) is fixedly connected to the eyepiece (11), and the second end of the slide tube (71) is slidably connected to the bent tube (5). The first end of the slide plate (74) is fixedly connected to the slide tube (71), and the second end of the slide plate (74) is threadedly connected to the bidirectional screw (75). The bidirectional screw (75) is rotatably mounted on the main body (1) of the detector. A reflector sheet (73) corresponding to the reflector (51) is fixed inside the slide tube (71).

3. A visual function testing instrument with a program mirror adjustment function according to claim 2, characterized in that: The main body (1) of the detector is fixed with a bearing seat (77), the bidirectional screw (75) is rotatably mounted on the bearing seat (77), and a first guide assembly is provided between the bearing seat (77) and the slide plate (74).

4. A visual function testing instrument with a program mirror adjustment function according to claim 3, characterized in that: The first guide assembly includes a first guide rod (78) disposed on the slide plate (74) and a first guide hole disposed on the bearing seat (77). The first guide rod (78) is slidably connected to the first guide hole, and the first guide rod (78) is arranged parallel to the bidirectional screw (75).

5. A visual function testing instrument with a program mirror adjustment function according to claim 4, characterized in that: A compression spring (79) is sleeved on the first guide rod (78). The first end of the compression spring (79) abuts against the bearing seat (77), and the second end of the compression spring (79) abuts against the slide plate (74).

6. A visual function testing instrument with a program mirror adjustment function according to claim 2, characterized in that: A knob (72) is fixed on the bidirectional screw (75), and a limiting groove is formed on the knob (72). A limiting block (76) is fixed on the main body (1) of the detector, and the limiting block (76) cooperates with the limiting groove to limit the position.

7. A visual function testing instrument with a program mirror adjustment function according to claim 1, characterized in that: The second adjustment mechanism includes a screw (41), a screw barrel (42), and a slide barrel (43). The screw (41) passes through the support plate (3) and is threadedly connected to the screw barrel (42). The screw barrel (42) is slidably connected to the slide barrel (43). The slide barrel (43) is fixedly connected to the back of the head support plate (31). A second guide assembly is provided between the back of the head support plate (31) and the support plate (3).

8. A visual function testing instrument with a program mirror adjustment function according to claim 7, characterized in that: The second guide assembly includes a second guide rod (47) disposed on the back of the headrest (31) and a second guide hole disposed on the support plate (3). The second guide rod (47) is slidably connected to the second guide hole, and the second guide rod (47) is arranged parallel to the slide cylinder (43).

9. A visual function testing instrument with a program mirror adjustment function according to claim 7, characterized in that: The slide cylinder (43) has an inner cavity formed inside. The first end of the screw cylinder (42) is threadedly connected to the screw (41). The second end of the screw cylinder (42) is slidably located in the inner cavity. A spring (45) is provided in the inner cavity. The first end of the spring (45) abuts against the screw cylinder (42), and the second end of the spring (45) abuts against the inner wall of the inner cavity.

10. A visual function testing instrument with a program mirror adjustment function according to claim 9, characterized in that: The slide cylinder (43) has a slide groove (46) formed on its side wall that communicates with the inner cavity. The second end of the screw cylinder (42) has a sliding pin (44) fixed on its outer wall. The sliding pin (44) is slidably connected to the slide groove (46).

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