Transmission mechanism and optical device

Abstract

The utility model discloses a transmission mechanism and an optical device. Comprising a base with a longitudinal guide structure and a transverse guide structure, and a longitudinal sliding seat which is arranged on the base in a sliding manner and is matched with the longitudinal guide structure, the transverse sliding seat is arranged on the base in a sliding mode and matched with the transverse guiding structure, and the synchronous driving assembly is used for driving the longitudinal sliding seat and the transverse sliding seat to slide synchronously. According to the transmission mechanism and the optical device disclosed by the utility model, the longitudinal sliding seat and the transverse sliding seat can be driven to synchronously slide and adjust through a set of synchronous driving assembly, so that three light paths of a display instrument, a light shape emission instrument and a camera are synchronously adjusted, the number of driving mechanisms is reduced, the cost is favorably reduced, and the installation is convenient; and the structure size can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission technology, and in particular to a transmission mechanism and an optical device. Background Technology

[0002] In the field of optical instruments, such as ophthalmic equipment, multiple sets of optical instruments are needed to achieve emission, refraction, and obtain the eye's refractive power, etc. For example, Figure 1 As shown, a light-emitting instrument is configured to emit a light spot to illuminate the eye, and a camera is configured to receive the light spot reflected back from the eye. The refractive power of the eye is calculated by the deformation of the light spot. A display instrument is also configured to attract the user's eye by displaying images, so that the camera can quickly focus. To reduce the structural size, the above three optical paths need to be integrated into the main optical path. A binary mirror is configured between the optical path of the light-emitting instrument and the main optical path to achieve reflection and transmission functions. A reflector is configured between the optical path of the camera and the main optical path to reflect the light spot reflected from the eye back to the camera. The optical path of the display instrument is the longest. If it were a straight line, the size in the direction perpendicular to the main optical path would be too large. Therefore, a reflector is used to make its optical path arranged in an L-shape, and a binary mirror is configured between its optical path and the main optical path to achieve reflection and transmission functions.

[0003] When focusing, along Figure 1 The display instrument or its matching lens is moved left-right (vertically), and correspondingly, it needs to be moved along... Figure 1 The camera and light-emitting instrument or matching lens are moved vertically (horizontally) with equal horizontal and vertical movement distances. Focusing is completed when the playback image is clearly visible to the eye.

[0004] In the prior art, a display instrument or a matching lens is mounted on a first sliding seat, and the first sliding seat is driven by a first motor screw mechanism to achieve longitudinal adjustment; a camera and a light-emitting instrument or a matching lens are mounted on a second sliding seat, and the second sliding seat is driven by a second motor screw mechanism to achieve lateral adjustment.

[0005] The existing technology that uses two sets of motor lead screw mechanisms to drive the product increases costs and requires consideration of the synchronization between the two sets of motor lead screw mechanisms. The two sets of motor lead screw mechanisms occupy a large space, which is not conducive to reducing product size. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a transmission mechanism and optical device. A set of synchronous drive components can drive the longitudinal sliding seat and the transverse sliding seat to slide and adjust synchronously, saving the number of drive mechanisms, which is conducive to reducing costs, facilitating installation, and reducing structural size.

[0007] This utility model provides a transmission mechanism, including a base having a longitudinal guide structure and a transverse guide structure, a longitudinal sliding seat slidably disposed on the base and cooperating with the longitudinal guide structure, a transverse sliding seat slidably disposed on the base and cooperating with the transverse guide structure, and a synchronous drive component for driving the longitudinal sliding seat and the transverse sliding seat to slide synchronously.

[0008] The lateral guide structure is located in front of the longitudinal guide structure and extends toward one side of the longitudinal guide structure;

[0009] The synchronous drive assembly includes a motor connected to the base and located behind the longitudinal guide structure, a pulley group connected to the base and arranged parallel to the transverse guide structure, and a flexible transmission element in a closed-loop structure.

[0010] The motor shaft of the motor is provided with a drive wheel, the flexible transmission element is wound between the drive wheel and the pulley group, and the longitudinal sliding seat and the transverse sliding seat are respectively connected to the flexible transmission element.

[0011] In one of the alternative technical solutions, the lateral guide structure includes a proximal end and a distal end that are disposed opposite to each other;

[0012] When the motor is rotating in the forward direction, the flexible transmission element can pull the longitudinal sliding seat toward the front end of the longitudinal guide structure and simultaneously pull the transverse sliding seat toward the far end of the transverse guide structure.

[0013] When the motor is in the reverse rotation state, the flexible transmission element can pull the longitudinal sliding seat toward the rear end of the longitudinal guide structure to slide and reset, and at the same time pull the transverse sliding seat toward the proximal end of the transverse guide structure to slide and reset.

[0014] In one of the alternative technical solutions, the flexible transmission element is a transmission steel wire.

[0015] In one of the alternative technical solutions, the longitudinal sliding seat is provided with a first positioning seat for positioning the display instrument.

[0016] In one of the alternative technical solutions, the transverse sliding seat is provided with a second positioning seat for positioning the light-emitting instrument and a third positioning seat for positioning the camera, with the second positioning seat and the third positioning seat arranged at a distance from each other.

[0017] In one of the alternative technical solutions, the drive wheel is located below the base, and the pulley assembly is located at the front end of the base;

[0018] One part of the flexible transmission element is located below the base, and the other part of the flexible transmission element is located on the front side of the base;

[0019] The longitudinal sliding seat includes a first connecting seat, which is located below the base and connected to the flexible transmission element;

[0020] The lateral sliding seat includes a second connecting seat that extends out of the front side of the base and is connected to the flexible transmission element.

[0021] In one of the alternative technical solutions, the pulley block includes a first steering wheel, a first fixed pulley, a second fixed pulley, a second steering wheel, and a third steering wheel arranged sequentially along the connection direction of the flexible transmission element;

[0022] The first steering wheel, the second steering wheel, and the third steering wheel are arranged horizontally. The first steering wheel is aligned with the drive wheel and is located near the first fixed pulley. The second steering wheel is located far from the second fixed pulley. The third steering wheel is located in front of the first steering wheel and the first fixed pulley.

[0023] The first connecting seat is connected to a section of the flexible transmission element that passes through the drive wheel and the first steering wheel;

[0024] The first fixed pulley and the second fixed pulley are arranged vertically, and the second connecting seat is located between the first fixed pulley and the second fixed pulley, and is connected to a section of the flexible transmission element that passes through the first fixed pulley and the second fixed pulley.

[0025] In one of the alternative technical solutions, the pulley block includes a vertically arranged first tensioning pulley, which is located between the first steering pulley and the first fixed pulley.

[0026] In one of the alternative technical solutions, the pulley block includes a vertically arranged second tensioning pulley, which is located between the second steering pulley and the second fixed pulley.

[0027] The present invention also provides an optical device, including a display instrument, a light-emitting instrument, a camera, and a transmission mechanism as described in any of the foregoing technical solutions;

[0028] The display instrument is located on the longitudinal sliding base, and the light-emitting instrument and the camera are located on the transverse sliding base.

[0029] The above technical solution has the following beneficial effects:

[0030] The transmission mechanism and optical device provided by this utility model include a base, a longitudinal sliding seat, a transverse sliding seat, and a synchronous drive assembly. The display instrument is mounted on the longitudinal sliding seat, while the light-emitting instrument and camera are mounted on the transverse sliding seat. The synchronous drive assembly includes a motor with a drive wheel, a pulley system located at the front end of the base, and a flexible transmission element with a closed-loop structure. The flexible transmission element is wound between the drive wheel and the pulley system, and the drive wheel drives the flexible transmission element to rotate forward or backward. The longitudinal and transverse sliding seats are respectively connected to the flexible transmission element, which drives the longitudinal and transverse sliding seats to slide synchronously. The sliding direction of the transverse sliding seat is perpendicular to the sliding direction of the longitudinal sliding seat, achieving adaptive adjustment of the three optical paths of the display instrument, the light-emitting instrument, and the camera.

[0031] In summary, the transmission mechanism and optical device disclosed in this utility model can drive the longitudinal sliding seat and the transverse sliding seat to slide and adjust synchronously through a set of synchronous drive components, thereby synchronously connecting the three optical paths of the display instrument, the light emitting instrument and the camera. This saves the number of drive mechanisms, which is beneficial for reducing costs, facilitating installation and reducing structural size. Attached Figure Description

[0032] The disclosure of this utility model will become more readily understood by referring to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings:

[0033] Figure 1 A schematic diagram of the existing optical path design;

[0034] Figure 2 A perspective view of a transmission mechanism provided in an embodiment of the present utility model;

[0035] Figure 3 This is an assembly diagram of the synchronous drive component, the longitudinal slide block, and the transverse slide block;

[0036] Figure 4 This is a schematic diagram showing the motor driving the flexible transmission element to rotate when it rotates in the forward direction.

[0037] Figure 5 A perspective view of an optical device provided in an embodiment of the present invention. Detailed Implementation

[0038] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0039] like Figure 2-4 As shown, an embodiment of the present invention provides a transmission mechanism including a base 1 having a longitudinal guide structure 11 and a transverse guide structure 12, a longitudinal sliding seat 2 slidably disposed on the base 1 and cooperating with the longitudinal guide structure 11, a transverse sliding seat 3 slidably disposed on the base 1 and cooperating with the transverse guide structure 12, and a synchronous drive assembly 4 for driving the longitudinal sliding seat 2 and the transverse sliding seat 3 to slide synchronously.

[0040] The lateral guide structure 12 is located in front of the longitudinal guide structure 11 and extends toward one side of the longitudinal guide structure 11.

[0041] The synchronous drive assembly 4 includes a motor 41 connected to the base 1 and located behind the longitudinal guide structure 11, a pulley block 42 connected to the base 1 and arranged parallel to the transverse guide structure 12, and a flexible transmission element 43 in a closed-loop structure.

[0042] The motor shaft of the motor 41 is equipped with a drive wheel 411, and a flexible transmission element 43 is wound between the drive wheel 411 and the pulley block 42. The longitudinal sliding seat 2 and the transverse sliding seat 3 are respectively connected to the flexible transmission element 43.

[0043] The transmission mechanism provided by this utility model is mainly used in optical instruments. The transmission mechanism includes a base 1, a longitudinal sliding seat 2, a transverse sliding seat 3, and a set of synchronous drive components 4.

[0044] The base 1 is roughly rectangular, but other shapes can also be used. Taking the roughly rectangular base 1 as an example, the two vertical directions are defined as longitudinal and transverse. Longitudinal can also refer to the front-to-back direction, and transverse can refer to the left-to-right direction.

[0045] A longitudinal guide structure 11 extending forward / backward or longitudinally is provided on the base 1. The longitudinal guide structure 11 can be a guide groove, guide rail, or other structure. The longitudinal guide structure 11 is located on the base 1 and close to one edge in the left-right direction. The left and right edges of the base 1 are defined as the proximal edge 11a and the distal edge 11b, respectively. The longitudinal guide structure 11 is arranged close to the proximal edge 11a. The end or side of the part on the base 1 facing / toward the proximal edge 11a is referred to as the proximal side or proximal end, and the end or side of the part on the base 1 facing / toward the distal edge 11b is referred to as the distal side or distal end.

[0046] A lateral guide structure 12 extending to the left and right or laterally is provided on the base 1. The lateral guide structure 12 can be a guide groove, guide rail or other structure.

[0047] A lateral guide structure 12 is positioned in front of the longitudinal guide structure 11, with a pre-defined space between the front end of the longitudinal guide structure 11 and the lateral guide structure 12. The lateral guide structure 12 is perpendicular to the longitudinal guide structure 11 and extends towards the distal side of the longitudinal guide structure 11. The proximal end 12a of the lateral guide structure 12 is located in front of the longitudinal guide structure 11 and faces the extension line of the longitudinal guide structure 11. The distal end 12b of the lateral guide structure 12 faces the distal edge 11b.

[0048] The longitudinal sliding seat 2 is slidably mounted on the base 1 and slides in engagement with the longitudinal guide structure 11. Guided by the longitudinal guide structure 11, the longitudinal sliding seat 2 can slide along the longitudinal direction of the base 1. In the initial state, the longitudinal sliding seat 2 is engaged with the rear end of the longitudinal guide structure 11. The longitudinal sliding seat 2 is used for mounting... Figure 5 The display instrument 5 shown can slide back and forth or longitudinally to adjust the optical path. In the optical device, a plane mirror 13 is arranged at an angle at the front end of the longitudinal guide structure 11 to reflect the image information displayed by the display instrument 5 toward the main optical path. A split mirror 14 is set at the intersection of the main optical path and the optical path of the plane mirror 13. The image information is reflected by the split mirror 14 and propagates backward along the main optical path to the user's eye. The light spot reflected back from the eye propagates forward through the split mirror 14.

[0049] The transverse sliding seat 3 is slidably mounted on the base 1 and slides in engagement with the transverse guide structure 12. Guided by the transverse guide structure 12, the transverse sliding seat 3 can slide laterally along the base 1. In the initial state, the transverse sliding seat 3 engages with the proximal end 12a of the transverse guide structure 12. The transverse sliding seat 3 is used for mounting... Figure 5 The light-emitting instrument 6 and camera 7 shown can be slid left and right / laterally to adjust the optical path. In the optical device, a bisecting mirror 15 is placed at the intersection of the optical path of the light-emitting instrument 6 and the main optical path. The light spot emitted by the light-emitting instrument 6 is reflected by the bisecting mirror 14 and propagates backward along the main optical path to the user's eye. The light spot reflected back from the eye propagates forward through the bisecting mirrors 14 and 15. In the optical device, a reflecting mirror 16 is placed at the intersection of the optical path of the camera 7 and the main optical path. The light spot propagating forward through the bisecting mirror 15 is reflected by the reflecting mirror 16 back to the camera 7.

[0050] The synchronous drive assembly 4 includes a motor 41 with a drive wheel 411, a pulley block 42 located at the front end of the base 1, and a flexible transmission element 43 in a closed-loop structure. The motor 41 is located at the rear of the longitudinal guide structure 11. The flexible transmission element 43 is wound between the drive wheel 411 and the pulley block 42. The pulley block 42 is used to tension the flexible transmission element 43 and guide the flexible transmission element 43 to rotate, thus forming a closed-loop structure. The flexible transmission element 43 can be a transmission wire, transmission belt, transmission cable, etc. The drive wheel 411 drives the flexible transmission element 43 to rotate in the forward or reverse direction.

[0051] The longitudinal sliding seat 2 and the transverse sliding seat 3 are respectively connected to the flexible transmission element 43. Since the motor 41 is located at the rear end of the base 1 and the pulley block 42 is located at the front end of the base 1, at least two segments of the flexible transmission element 43 are arranged longitudinally. The longitudinal sliding seat 2 is connected to a segment of the longitudinally arranged flexible transmission element 43 located between the pulley block 42 and the drive wheel 411, so the longitudinal sliding seat 2 can be driven to slide longitudinally by this segment of the flexible transmission element 43. Furthermore, since multiple pulleys in the pulley block 42 are arranged laterally at intervals and are parallel to the transverse guide structure 12, at least two segments of the flexible transmission element 43 are arranged laterally. The transverse sliding seat 3 is connected to a segment of the transversely arranged flexible transmission element 43 passing through both ends of the pulley block 42, so the transverse sliding seat 3 can be driven to slide laterally by this segment of the flexible transmission element 43.

[0052] If the flexible transmission element 43 is divided into two strands, for example, a first strand and a second strand, with the drive wheel 411 as the boundary, then when the drive wheel 411 rotates in the forward direction, the first strand of flexible transmission element 43 moves towards the sliding wheel 41, and the second strand of flexible transmission element 43, after being turned by the sliding wheel 41, moves towards the drive wheel 411. Conversely, when the drive wheel 411 rotates in the reverse direction, the second strand of flexible transmission element 43 moves towards the sliding wheel 41, and the first strand of flexible transmission element 43, after being turned by the sliding wheel 41, moves towards the drive wheel 411.

[0053] The longitudinal sliding seat 2 and the transverse sliding seat 3 are connected to the same flexible transmission element 43, which ensures that when the longitudinal sliding seat 2 slides forward, the transverse sliding seat 3 slides synchronously toward the far end 12b; when the longitudinal sliding seat 2 slides backward, the transverse sliding seat 3 slides synchronously toward the near end 12a, and the sliding direction of the transverse sliding seat 3 is perpendicular to the sliding direction of the longitudinal sliding seat 2, thus realizing the adaptive adjustment of the three optical paths of the display instrument 5, the light-emitting instrument 6, and the camera 7.

[0054] The longitudinal sliding seat 2 and the transverse sliding seat 3 can be connected to the flexible transmission element 43 through connectors, pressure blocks, buckles, etc.

[0055] In summary, the transmission mechanism disclosed in this utility model can drive the longitudinal sliding seat 2 and the transverse sliding seat 3 to slide and adjust synchronously through a set of synchronous drive components 4, thereby synchronously connecting the three optical paths of the display instrument 5, the light-emitting instrument 6 and the camera 7. This saves the number of drive mechanisms, which is beneficial for reducing costs, facilitating installation, and reducing structural size.

[0056] In one embodiment, such as Figure 3-4 As shown, the lateral guide structure 12 includes a proximal end 12a and a distal end 12b disposed opposite to each other. The distance between the proximal end 12a of the lateral guide structure 12 and the longitudinal guide structure 11 is less than the distance between the distal end 12b of the lateral guide structure 12 and the longitudinal guide structure 11.

[0057] When the motor 41 is rotating in the forward direction, the flexible transmission element 43 can pull the longitudinal sliding seat 2 toward the front end of the longitudinal guide structure 11 and at the same time pull the transverse sliding seat 3 toward the far end 12b of the transverse guide structure 12.

[0058] When the motor 41 is in the reverse rotation state, the flexible transmission element 43 can pull the longitudinal sliding seat 2 towards the rear end of the longitudinal guide structure 11 to slide and reset, and at the same time pull the transverse sliding seat 3 towards the proximal end 12a of the transverse guide structure 12 to slide and reset.

[0059] In this embodiment, as described above, the two ends of the transverse guide structure 12 are divided into a proximal end 12a and a distal end 12b, with the proximal end 12a facing the longitudinal guide structure 11 and the distal end 12b facing away from the longitudinal guide structure 11.

[0060] In the initial state, the longitudinal sliding seat 2 is engaged at the rear end of the longitudinal guide structure 11, and the transverse sliding seat 3 is engaged at the proximal end 12a of the transverse guide structure 12. At this time, the three optical paths of the display instrument 5, the light-emitting instrument 6, and the camera 7 are all at their longest.

[0061] When focusing is required, the forward and reverse rotation of motor 41 is used to drive the forward and reverse rotation of flexible transmission element 43.

[0062] When the motor 41 rotates in the forward direction, the flexible transmission element 43 pulls the longitudinal sliding seat 2 toward the front end of the longitudinal guide structure 11 and simultaneously pulls the transverse sliding seat 3 toward the far end 12b of the transverse guide structure 12.

[0063] When the motor 41 rotates in the reverse direction, the flexible transmission element 43 pulls the longitudinal sliding seat 2 toward the rear end of the longitudinal guide structure 11 to slide and reset, and at the same time pulls the transverse sliding seat 3 toward the proximal end 12a of the transverse guide structure 12 to slide and reset.

[0064] In one embodiment, the flexible transmission element 43 is a transmission steel wire, which has good toughness, is easy to wind and lay, has a small diameter, requires a small pulley size, and is easy to lay.

[0065] In one embodiment, such as Figure 2-3 and Figure 5 As shown, the longitudinal sliding seat 2 is provided with a first positioning seat 21 for positioning the display instrument 5. The first positioning seat 21 can be a retainer, sleeve, etc., to fix the display instrument 5.

[0066] Display instrument 5 can be an electronic instrument with an LCD screen.

[0067] In one embodiment, such as Figure 2-3 and Figure 5 As shown, the horizontal sliding seat 3 is provided with a second positioning seat 31 for positioning the light-emitting instrument 6 and a third positioning seat 32 for positioning the camera 7. The second positioning seat 31 and the third positioning seat 32 are arranged at intervals.

[0068] The second positioning seat 31 is located behind the third positioning seat 32. The second positioning seat 31 can be a clamp, sleeve, or the like to fix the light-emitting instrument 6. The light-emitting instrument 6 can be an optical instrument with a light spot emission module. The light spot emission module can emit circular light spots, annular light spots, etc.

[0069] The third positioning seat 32 can be a clamp, sleeve, or similar device to secure the camera 7. The camera 7 can be a camera with infrared imaging capabilities.

[0070] In one embodiment, such as Figure 2-4 As shown, the drive wheel 411 is located below the base 1, and the pulley block 42 is located at the front end of the base 1.

[0071] A portion of the flexible transmission element 43 is located below the base 1, and another portion of the flexible transmission element 43 is located on the front side of the base 1.

[0072] The longitudinal sliding seat 2 includes a first connecting seat 22, which is located below the base 1 and connected to the flexible transmission element 43.

[0073] The transverse sliding seat 3 includes a second connecting seat 33, which extends out of the front side of the base 1 and is connected to the flexible transmission element 43.

[0074] In this embodiment, the drive wheel 411 is positioned below the base 1, and the pulley assembly 42 is positioned at the front edge of the base 1. This ensures that the longitudinally arranged flexible transmission element 43 is positioned below the base 1 and does not affect the sliding of the longitudinal sliding seat 2 above the base 1. Furthermore, the transversely arranged flexible transmission element 43 is positioned on the front surface of the base 1 and does not affect the sliding of the transverse sliding seat 3 above the base 1.

[0075] In order to connect the longitudinal sliding seat 2 with the flexible transmission element 43, a first connecting seat 22 is provided at the bottom of the longitudinal sliding seat 2. The first connecting seat 22 is disposed below the base 1 and connected to the flexible transmission element 43.

[0076] In order to connect the transverse sliding seat 3 with the flexible transmission element 43, a second connecting seat 33 is provided on the front side of the transverse sliding seat 3. The second connecting seat 33 extends out of the front side of the base 1 and is connected to the flexible transmission element 43.

[0077] In one embodiment, such as Figure 2-4 As shown, the pulley block 42 includes a first steering wheel 421, a first fixed pulley 422, a second fixed pulley 423, a second steering wheel 424 and a third steering wheel 425 arranged sequentially along the connection direction of the flexible transmission element 43.

[0078] The first steering wheel 421, the second steering wheel 424 and the third steering wheel 425 are arranged horizontally. The first steering wheel 421 is aligned with the drive wheel 411 and is located near the first fixed pulley 422. The second steering wheel 424 is located far from the second fixed pulley 423. The third steering wheel 425 is located in front of the first steering wheel 421 and the first fixed pulley 422.

[0079] The first connecting seat 22 is connected to a flexible transmission element 43 that passes through the drive wheel 411 and the first steering wheel 421.

[0080] The first fixed pulley 422 and the second fixed pulley 423 are arranged vertically respectively. The second connecting seat 33 is located between the first fixed pulley 422 and the second fixed pulley 423, and is connected to a flexible transmission element 43 that passes through the first fixed pulley 422 and the second fixed pulley 423.

[0081] In this embodiment, the pulley block 42 includes multiple fixed pulleys and multiple steering pulleys. The axles of the fixed pulleys are horizontally arranged and connected to the fixed structure of the base 1, so the side surfaces of the fixed pulleys are arranged vertically, also referred to as vertical arrangement. The axles of the steering pulleys are vertically arranged and connected to the fixed structure of the base 1, so the side surfaces of the fixed pulleys are arranged horizontally.

[0082] The steering wheels include a first steering wheel 421, a second steering wheel 424, and a third steering wheel 425. The first steering wheel 421 is located on the proximal side of the pulley block 42, the second steering wheel 424 is located on the distal side of the pulley block 42, and the third steering wheel 425 is located on the proximal side of the pulley block 42 and diagonally rearward of the first steering wheel 421. Figure 4 For example, the flexible transmission element 43 transmitted from the drive wheel 411 turns towards the far side via the first steering wheel 421, then towards the near side via the second steering wheel 424, and then towards the drive wheel 411 via the third steering wheel 425.

[0083] The first connecting seat 22 is connected to a flexible transmission element 43 located between the drive wheel 411 and the first steering wheel 421.

[0084] The fixed pulleys include a first fixed pulley 422 and a second fixed pulley 423. The first fixed pulley 422 is located on the proximal side of the second connecting seat 33, and the second fixed pulley 423 is located on the distal side of the second connecting seat 33. The flexible transmission element 43, after being turned by the first steering wheel 421, transmits power through the first fixed pulley 422 and the second fixed pulley 423 to the second steering wheel 424. The second connecting seat 33 is connected to a section of the flexible transmission element 43 located between the first fixed pulley 422 and the second fixed pulley 423.

[0085] In this way, when the motor 41 rotates in the forward direction, a flexible transmission element 43 located between the drive wheel 411 and the first steering wheel 421 will pull the first connecting seat 22, causing the longitudinal sliding seat 2 to slide toward the front end of the longitudinal guide structure 11. At the same time, a flexible transmission element 43 located between the first fixed pulley 422 and the second fixed pulley 423 will pull the second connecting seat 33, causing the transverse sliding seat 3 to slide toward the far end 12b of the transverse guide structure 12.

[0086] When the motor 41 rotates in the reverse direction, a flexible transmission element 43 located between the drive wheel 411 and the first steering wheel 421 pulls the first connecting seat 22, causing the longitudinal sliding seat 2 to slide and reset towards the rear end of the longitudinal guide structure 11. At the same time, a flexible transmission element 43 located between the first fixed pulley 422 and the second fixed pulley 423 pulls the second connecting seat 33, causing the transverse sliding seat 3 to slide and reset towards the proximal end 12a of the transverse guide structure 12.

[0087] In one embodiment, such as Figure 2-4 As shown, the pulley block 42 includes a vertically arranged first tensioning pulley 426, which is located between the first steering pulley 421 and the first fixed pulley 422, and serves to tension the flexible transmission element 43 near the second connecting seat 33.

[0088] In one embodiment, such as Figure 2-4 As shown, the pulley block 42 includes a vertically arranged second tensioning pulley 427, which is located between the second steering pulley 424 and the second fixed pulley 423, and serves to tension the flexible transmission element 43 on the far side of the second connecting seat 33.

[0089] like Figure 5 As shown, an embodiment of the present invention provides an optical device including a display instrument 5, a light-emitting instrument 6, a camera 7, and a transmission mechanism as described in any of the foregoing embodiments.

[0090] Display instrument 5 is located on the longitudinal sliding seat 2, while light-emitting instrument 6 and camera 7 are located on the transverse sliding seat 3.

[0091] The base 1 is equipped with a reflector 13, a bipartite mirror 14, a bipartite mirror 15 and a reflector 16 to meet the needs of light reflection, projection and propagation.

[0092] The main optical path is located far from the display instrument 5, the light-emitting instrument 6, and the camera 7, and propagates longitudinally.

[0093] The reflector 13 is located directly in front of the display instrument 5, and the bipartite mirror 14 is located far from the reflector 13 and at the intersection of the optical path of the reflector 13 and the main optical path.

[0094] The bipartite mirror 15 is located on the far side of the light-emitting instrument 6 and at the intersection of the light-emitting instrument 6 and the main light path.

[0095] The reflector 16 is located on the far side of the camera 7 and at the intersection of the optical paths of the camera 7 and the main optical path.

[0096] The pattern information displayed by the display instrument 5 can be reflected by the reflector 13 and the bipartite mirror 14 and then propagated backward along the main optical path to the user's eyes.

[0097] The light spot emitted by the light-emitting instrument 6 can be reflected by the bipartite mirror 15 and then propagated backward along the main light path to the user's eye.

[0098] The light spot reflected from the eye can pass through the bisecting mirrors 14 and 15 and propagate forward to the reflecting mirror 16, where it is reflected back to the camera 17.

[0099] When focusing is required, a set of synchronous drive components 4 can drive the longitudinal sliding seat 2 and the transverse sliding seat 3 to slide and adjust synchronously, thereby synchronously connecting the three optical paths of the display instrument 5, the light emission instrument 6 and the camera 7. This saves the number of drive mechanisms, which helps to reduce costs, facilitates installation, and also helps to reduce the structural size.

[0100] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0101] The above are merely the principles and preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several other modifications can be made based on the principles of this utility model, and these modifications should also be considered within the scope of protection of this utility model.

Claims

1. A transmission mechanism, characterized in that, It includes a base having a longitudinal guide structure and a transverse guide structure, a longitudinal sliding seat slidably disposed on the base and cooperating with the longitudinal guide structure, a transverse sliding seat slidably disposed on the base and cooperating with the transverse guide structure, and a synchronous drive assembly for driving the longitudinal sliding seat and the transverse sliding seat to slide synchronously. The lateral guide structure is located in front of the longitudinal guide structure and extends toward one side of the longitudinal guide structure; The synchronous drive assembly includes a motor connected to the base and located behind the longitudinal guide structure, a pulley group connected to the base and arranged parallel to the transverse guide structure, and a flexible transmission element in a closed-loop structure. The motor shaft of the motor is provided with a drive wheel, the flexible transmission element is wound between the drive wheel and the pulley group, and the longitudinal sliding seat and the transverse sliding seat are respectively connected to the flexible transmission element.

2. The transmission mechanism according to claim 1, characterized in that, The lateral guide structure includes a proximal end and a distal end that are arranged opposite to each other; When the motor is rotating in the forward direction, the flexible transmission element can pull the longitudinal sliding seat toward the front end of the longitudinal guide structure and simultaneously pull the transverse sliding seat toward the far end of the transverse guide structure. When the motor is in the reverse rotation state, the flexible transmission element can pull the longitudinal sliding seat toward the rear end of the longitudinal guide structure to slide and reset, and at the same time pull the transverse sliding seat toward the proximal end of the transverse guide structure to slide and reset.

3. The transmission mechanism according to claim 1, characterized in that, The flexible transmission element is a transmission steel wire.

4. A transmission mechanism according to claim 1, characterized in that, The longitudinal sliding seat is provided with a first positioning seat for positioning the display instrument.

5. A transmission mechanism according to claim 1, characterized in that, The transverse sliding seat is provided with a second positioning seat for positioning the light-emitting instrument and a third positioning seat for positioning the camera, with the second positioning seat and the third positioning seat arranged at a distance from each other.

6. A transmission mechanism according to any one of claims 1-5, characterized in that, The drive wheel is located below the base, and the pulley assembly is located at the front end of the base; One part of the flexible transmission element is located below the base, and the other part of the flexible transmission element is located on the front side of the base; The longitudinal sliding seat includes a first connecting seat, which is located below the base and connected to the flexible transmission element; The lateral sliding seat includes a second connecting seat that extends out of the front side of the base and is connected to the flexible transmission element.

7. A transmission mechanism according to claim 6, characterized in that, The pulley assembly includes a first steering wheel, a first fixed pulley, a second fixed pulley, a second steering wheel, and a third steering wheel arranged sequentially along the connection direction of the flexible transmission element; The first steering wheel, the second steering wheel, and the third steering wheel are arranged horizontally. The first steering wheel is aligned with the drive wheel and is located near the first fixed pulley. The second steering wheel is located far from the second fixed pulley. The third steering wheel is located in front of the first steering wheel and the first fixed pulley. The first connecting seat is connected to a section of the flexible transmission element that passes through the drive wheel and the first steering wheel; The first fixed pulley and the second fixed pulley are arranged vertically, and the second connecting seat is located between the first fixed pulley and the second fixed pulley, and is connected to a section of the flexible transmission element that passes through the first fixed pulley and the second fixed pulley.

8. A transmission mechanism according to claim 7, characterized in that, The pulley block includes a vertically arranged first tensioning pulley, which is located between the first steering pulley and the first fixed pulley.

9. A transmission mechanism according to claim 7, characterized in that, The pulley block includes a vertically arranged second tensioning pulley, which is located between the second steering pulley and the second fixed pulley.

10. An optical device, characterized in that, Includes a display instrument, a light-emitting instrument, a camera, and a transmission mechanism as described in any one of claims 1-9; The display instrument is located on the longitudinal sliding base, and the light-emitting instrument and the camera are located on the transverse sliding base.

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