Mirror group switching device

Abstract

The utility model provides a lens group switching device, which relates to the technical field of optical instruments. The driving force generated by a driving component acts on a movable plate. Since the movable plate is slidably connected to a fixed body, the movable plate can slide relative to the fixed body, thereby driving the lens group to be switched to move into or away from the optical path. Moreover, since an elastic component is arranged between the moving end of the driving component and the movable plate, the moving end of the driving component and the movable plate are elastically connected. After the movable plate is moved into position and fixed, the moving end of the driving component can still move, thereby preventing the movable plate from being over-constrained in positioning. The driving component will not be subjected to a load from the movable plate, thereby avoiding stalling. The technical problems of inconvenient operation of manually switching the lens group and poor positioning accuracy existing in the prior art are alleviated.

Description

Technical Field

[0001] The utility model relates to the technical field of optical instruments, in particular to a lens group switching device. Background Art

[0002] Optical Coherence Tomography (OCT) is a three-dimensional imaging technology that has a wide range of applications, especially in biomedical imaging, including diagnostic imaging in ophthalmology, cardiovascular, dermatology, etc. OCT imaging technology has the advantages of high resolution, fast imaging speed and high sensitivity. There are two types of OCT image objects, one is the retinal OCT image, that is, the optically designed object plane falls on the retina, and the system takes OCT images of the retina; the other is the anterior segment OCT image, that is, the optically designed object plane falls on the cornea, and the system takes OCT images of the anterior segment. In the existing OCT market, a considerable portion of products cover both the anterior segment and posterior segment scanning functions, and there are different ways to switch between the anterior segment imaging function and the fundus imaging function.

[0003] The lens group switching of optical instruments includes external switching and internal switching. The external switching method requires manual operation by the user, which is less convenient and difficult to take into account the internal fixation lamp. Some internal switching methods rely on multiple planar reflective optical elements to switch between two independent optical paths, which makes the optical path complex, requires high positioning accuracy, is difficult to install and calibrate, and has a large structure size. Some internal switching methods move the intermediate image plane of the system to the front of the eye, but the available field of view is relatively small, and this design makes it difficult to achieve telecentric imaging, which limits the system's ability to make quantitative measurements. It is also inconvenient for users to operate and requires manual switching of the lens group. The precision optical lens group is exposed, greatly increasing the risk of damage. Utility Model Content

[0004] The utility model aims to provide a lens group switching device to alleviate the technical problems of inconvenient operation and poor positioning accuracy of manually switching lens groups in the prior art.

[0005] The lens group switching device provided by the utility model comprises:

[0006] A fixed body, the fixed body comprising a first plate arranged along a first direction and a second plate arranged along a second direction, the first direction and the second direction being perpendicular, a front lens group and a rear lens group being arranged on the first plate at intervals along the first direction, and an optical path being formed between the front lens group and the rear lens group;

[0007] A movable plate, on which a mirror group to be switched is arranged, and the movable plate is slidably connected to the fixed body;

[0008] A driving member, wherein a driving force generated by the driving member can drive the movable plate to move along a second direction, so that the mirror group to be switched moves into the optical path or moves away from the optical path;

[0009] An elastic member, one end of which is connected to the moving end of the driving member, and the other end of which is connected to the moving plate, so that the moving end of the driving member is elastically connected to the moving plate.

[0010] In an alternative embodiment,

[0011] The driving member comprises a driving body, a rotating screw, a moving nut and a bearing seat;

[0012] The driving body is fixed on the second flat plate;

[0013] One end of the rotating screw is connected to the driving body, and the other end of the rotating screw passes through the moving plate;

[0014] The movable nut is threadedly connected to the rotating screw, and the movable nut is arranged on a side of the movable plate away from the driving body;

[0015] The rotating screw is configured to be rotatable along its own axis, so as to drive the moving plate to move along the axis of the rotating screw through the moving nut.

[0016] In an alternative embodiment,

[0017] A nut fixing seat is provided on one side of the movable plate away from the driving body;

[0018] The movable nut is arranged in the nut fixing seat;

[0019] The elastic component is arranged in the nut fixing seat, one end of the elastic component is connected to the movable nut, and the other end of the elastic component is connected to the inner wall of the nut fixing seat.

[0020] In an alternative embodiment,

[0021] The nut fixing seat comprises a connecting portion and a supporting portion;

[0022] One end of the connecting portion is connected to the movable plate, and the other end of the connecting portion is connected to the supporting portion;

[0023] The moving nut is movable between the moving plate and the supporting portion, and one end of the elastic member is connected to the supporting portion.

[0024] In an alternative embodiment,

[0025] The support portion is provided with a notch;

[0026] The movable nut comprises a cap brim and a nut body which are connected to each other, the cap brim can abut against the movable plate, the nut body is arranged through the notch, the elastic member is sleeved on the nut body, and one end of the elastic member away from the support part is connected to the cap brim.

[0027] In an alternative embodiment,

[0028] The inner side wall of the connecting portion is provided with a sliding protrusion;

[0029] The brim is provided with a sliding groove;

[0030] The sliding protrusion extends into the sliding groove so that the brim moves along the sliding protrusion.

[0031] In an alternative embodiment,

[0032] The second flat plate is provided with a guide rail, and the guide rail is arranged along the second direction;

[0033] The movable plate is provided with a sliding block, and the sliding block is slidably connected with the guide rail so that the movable plate can slide along the guide rail.

[0034] In an alternative embodiment,

[0035] The guide rail and the driving member are respectively arranged on two sides of the second flat plate;

[0036] The movable plate is provided with a notch, the second flat plate passes through the notch, the movable plate has a first plate body and a second plate body, the notch is formed between the first plate body and the second plate body, the rotating screw passes through the first plate body, and the sliding block is arranged on the second plate body.

[0037] In an alternative embodiment,

[0038] A sensor component is disposed on the second flat plate;

[0039] The movable plate is provided with a sensor triggering part;

[0040] The sensor component is configured to sense the sensor triggering portion to determine the position of the moving plate.

[0041] In an alternative embodiment,

[0042] The lens group switching device also includes a support seat;

[0043] The support seat is arranged on the first flat plate, and the support seat is located below the movable plate. When the movable plate abuts against the support seat, the mirror group to be switched is located in the optical path.

[0044] The lens group switching device provided by the utility model acts on the movable plate through the driving force generated by the driving component. Since the movable plate is slidably connected with the fixed body, the movable plate can slide relative to the fixed body, thereby driving the lens group to be switched to move into the optical path or move away from the optical path. Moreover, since an elastic component is arranged between the moving end of the driving component and the movable plate, the moving end of the driving component and the movable plate are elastically connected. After the movable plate is moved into position and fixed, the moving end of the driving component can still move, thereby preventing the movable plate from being over-constrained in positioning. The driving component will not be subjected to the load from the movable plate, thereby avoiding stalling. The technical problems of inconvenient operation and poor positioning accuracy of manually switching the lens group in the prior art are alleviated. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 A schematic diagram of the overall structure of the lens group switching device provided by an embodiment of the utility model;

[0047] Figure 2 A schematic structural diagram of the lens group switching device provided by an embodiment of the utility model from another perspective;

[0048] Figure 3 A schematic diagram of the structure of a driving component and a moving plate in a mirror group switching device provided by an embodiment of the utility model;

[0049] Figure 4 A schematic diagram of the structure of a moving plate and a guide rail in a mirror group switching device provided in an embodiment of the utility model;

[0050] Figure 5 This is a schematic diagram of the installation of a sensor component and a sensor triggering part in the lens group switching device provided in an embodiment of the utility model.

[0051] Icons: 10-lens group to be switched; 11-front lens group; 12-rear lens group; 110-first plate; 120-second plate; 200-movable plate; 210-nut fixing seat; 211-connecting part; 212-supporting part; 213-sliding protrusion; 220-first plate body; 230-second plate body; 231-sliding block; 240-recess; 300-driving component; 310-driving body; 320-rotating screw; 330-moving nut; 331-cap brim; 332-nut body; 340-bearing seat; 400-elastic component; 500-guide rail; 600-sensor component; 610-sensor triggering part; 700-support seat. DETAILED DESCRIPTION

[0052] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0053] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0056] like Figure 1 , Figure 2As shown, the mirror group switching device provided in this embodiment includes: a fixed body, a moving plate 200 , a driving member 300 and an elastic member 400 .

[0057] The fixing body includes a first plate 110 arranged along a first direction and a second plate 120 arranged along a second direction. The first direction and the second direction are perpendicular. The first direction is a horizontal direction and the second direction is a vertical direction. Alternatively, the first direction is a vertical direction and the second direction is a horizontal direction. The direction is determined according to the specific installation position. Figure 1 Taking the example of FIG. 1 as an example, the first direction is the horizontal direction, and the second direction is the vertical direction.

[0058] A front lens group 11 and a rear lens group 12 are spaced apart from each other along a first direction on the first flat plate 110 , and an optical path is formed between the front lens group 11 and the rear lens group 12 .

[0059] The moving plate 200 is provided with a lens group 10 to be switched, and the moving plate 200 is slidably connected to the fixed body. The driving component 300 is provided on the second flat plate 120. The driving force generated by the driving component 300 can drive the moving plate 200 to move along the second direction, so that the lens group 10 to be switched moves along the second direction, and then the lens group 10 to be switched can be moved into the optical path or moved away from the optical path. The movement of the lens group 10 to be switched is realized by the driving component 300. When the lens group 10 to be switched moves into the optical path, it is in the anterior segment detection mode, and when the lens group 10 to be switched moves out of the optical path, it is in the retinal detection mode.

[0060] One end of the elastic member 400 is connected to the moving end of the driving member 300, and the other end of the elastic member 400 is connected to the moving plate 200, so that the moving end of the driving member 300 is elastically connected to the moving plate 200, that is, the force generated by the driving member 300 acts on the moving plate 200 through the elastic member 400, and there is no complete constraint between the moving end of the driving member 300 and the moving plate 200, but an elastic connection relationship, which can prevent the failure of repeated positioning accuracy due to over-constraint of the mirror group.

[0061] The lens group switching device provided in the present embodiment acts on the movable plate 200 through the driving force generated by the driving component 300. Since the movable plate 200 is slidably connected to the fixed body, the movable plate 200 can slide relative to the fixed body, thereby driving the lens group 10 to be switched to move into or away from the optical path. In addition, since an elastic component 400 is arranged between the moving end of the driving component 300 and the movable plate 200, the moving end of the driving component 300 and the movable plate 200 are elastically connected. After the movable plate 200 is moved into position and fixed, the moving end of the driving component 300 can still move, thereby preventing the movable plate 200 from being over-constrained in positioning. The driving component 300 will not be subjected to the load from the movable plate 200, thereby avoiding stalling. The technical problems of inconvenient operation and poor positioning accuracy of manually switching the lens group in the prior art are alleviated.

[0062] Regarding the structure and shape of the driving member 300, specifically:

[0063] like Figure 3 As shown, the driving component 300 includes a driving body 310, a rotating screw rod 320, a movable nut 330 and a bearing seat 340; the driving body 310 is specifically configured as a driving motor, which is fixed on the second plate 120; one end of the rotating screw rod 320 is connected to the driving body 310, and the other end of the rotating screw rod 320 passes through the moving plate 200 and is connected to the bearing seat 340, and the bearing seat 340 is fixed on the second plate 120, so that the rotating screw rod can rotate along its own axis; the movable nut 330 is threadedly connected to the rotating screw rod 320, and the movable nut 330 is arranged on the side of the moving plate 200 away from the driving body 310; the rotating screw rod 320 rotates along its own axis, and drives the moving plate 200 to move along the axis of the rotating screw rod 320 through the movable nut 330.

[0064] It should be noted that the movable plate 200 moves within a certain range along the rotating screw rod 320. When the movable plate 200 moves to the lowermost position, the lens group 10 to be switched is just located in the optical path. When the rotating screw rod 320 rotates forward, the movable nut 330 moves upward, and the movable nut 330 abuts against the movable plate 200, driving the movable plate 200 to move upward together, and the lens group 10 to be switched moves out of the optical path. At this time, the elastic force of the elastic component 400 also plays a role in supporting the movable nut 330, maintaining the stability of the movable nut 330 and avoiding shaking; when the rotating screw rod 320 reverses, the movable nut 330 moves downward, and the movable nut 330 drives the movable plate 200 to move downward together through the elastic component 400, moving in the direction close to the optical path. When it reaches the lowermost position, the lens group 10 to be switched is placed in the optical path.

[0065] In order to ensure that the elastic component 400 can act on the movable plate 200, further, a nut fixing seat 210 is provided on the side of the movable plate 200 away from the driving body 310; the movable nut 330 is provided in the nut fixing seat 210, and the elastic component 400 is provided in the nut fixing seat 210, one end of the elastic component 400 is connected to the movable nut 330, and the other end of the elastic component 400 is connected to the inner wall of the nut fixing seat 210, when the movable nut 330 moves downward, the movable nut 330 squeezes the elastic component 400, and the driving force is transmitted to the nut fixing seat 210 through the elastic component 400, thereby driving the movable plate 200 to move downward together.

[0066] When the lens group 10 to be switched is placed in the optical path, the rotating screw 320 can continue to rotate, the moving nut 330 continues to move in the nut fixing seat 210, the elastic component 400 is compressed, but the moving plate 200 does not move, avoiding the fixed constraint of the moving plate 200, causing the drive motor to be blocked.

[0067] Furthermore, the nut fixing seat 210 specifically includes a connecting portion 211 and a supporting portion 212. The connecting portion 211 and the supporting portion 212 can be an integrally formed structure. One end of the connecting portion 211 is connected to the movable plate 200, and the other end of the connecting portion 211 is connected to the supporting portion 212. The supporting portion 212 is specifically a supporting plate structure arranged in a horizontal direction. The movable nut 330 can move between the movable plate 200 and the supporting portion 212. One end of the elastic member 400 is connected to the supporting portion 212. The supporting portion 212 plays a role in fixing the end of the elastic member 400, that is, the force of the elastic member 400 acts on the supporting portion 212.

[0068] It should be noted that, in the prior art, a fixed connection is adopted between the movable nut 330 and the movable plate 200, and at the same time, the movable plate 200 and the sliding block 231 are fixedly connected. However, adopting fixed connections at both ends at the same time will cause the movable plate 200 to be over-constrained. However, in this embodiment, since the movable nut 330 and the movable plate 200 are not fixedly connected, the movable nut 330 can move between the movable plate 200 and the support portion 212, and therefore the movable plate 200 will not be over-constrained.

[0069] In an optional embodiment, the support portion 212 is provided with a notch; the movable nut 330 includes a brim 331 and a nut body 332 connected to each other, the nut body 332 is a cylindrical structure, has an internal thread on the inner wall, and is threadedly connected to the rotating screw 320, the brim 331 is formed by extending from the top of the nut body 332 to both sides, the brim 331 can abut against the movable plate 200, the nut body 332 is set through the notch, the nut body 332 can move in the notch, the elastic member 400 is sleeved on the nut body 332, and the end of the elastic member 400 away from the support portion 212 is connected to the brim 331, when the nut body 332 moves downward in the notch, the elastic member 400 is compressed.

[0070] It should be noted that two ends of the elastic member 400 are respectively connected to the support portion 212 and the brim 331 , and the connection method may be welding or abutment.

[0071] In an optional embodiment, the inner side wall of the connecting portion 211 is provided with a sliding protrusion 213; the brim 331 is provided with a sliding groove; the sliding protrusion 213 extends into the sliding groove so that the brim 331 moves along the sliding protrusion 213, and the setting of the sliding groove and the sliding protrusion 213 limits the moving direction of the brim 331 and plays a guiding role.

[0072] In order to limit the moving direction of the movable plate 200, a guide rail 500 is provided on the second plate 120, and the guide rail 500 is arranged along the second direction, that is, the arrangement direction of the guide rail 500 is parallel to the arrangement direction of the rotating screw 320, and the guide rail 500 and the driving component 300 are respectively arranged on both sides of the second plate 120; a sliding block 231 is provided on the movable plate 200, and the sliding block 231 is slidably connected to the guide rail 500, so that the movable plate 200 can slide along the guide rail 500.

[0073] like Figure 4 As shown, the movable plate 200 is specifically a plate-like structure, and a notch 240 is opened on one side thereof, which is a concave shape. The second flat plate 120 passes through the notch 240. The movable plate 200 has a first plate body 220 and a second plate body 230. The notch 240 is formed between the first plate body 220 and the second plate body 230. The rotating screw 320 passes through the first plate body 220, and the sliding block 231 is arranged on the second plate body 230. The design of the notch 240 can make the second flat plate 120 and the movable plate 200 more compact, saving the volume of the overall device.

[0074] In an optional embodiment, the mirror group switching device also includes a support seat 700; the support seat 700 is arranged on the first flat plate 110, and the support seat 700 is located below the movable plate 200. When the movable plate 200 abuts against the support seat 700, the mirror group to be switched 10 is located in the optical path, and the support seat 700 plays a role in supporting the mirror group to be switched 10. In addition, a magnet can be further arranged on the support seat 700, and the magnetic force of the magnet can be used to magnetically attract the mirror group to be switched 10 to the support seat 700, so as to ensure the positioning stability of the mirror group to be switched 10.

[0075] In an optional embodiment, if Figure 5 As shown, a sensor component 600 is disposed on the second flat plate 120 ; a sensor triggering portion 610 is disposed on the moving plate 200 ; and the sensor component 600 is configured to sense the sensor triggering portion 610 to determine the position of the moving plate 200 .

[0076] Specifically, the sensor component 600 is specifically configured as a photoelectric sensor. When the sensor trigger part 610 to which the movable plate 200 moves extends into the position of the sensor component 600, that is, when the trigger part is located between the laser transmitting end and the receiving end of the photoelectric sensor, the photoelectric sensor is triggered, and the receiving end of the photoelectric sensor cannot receive the laser sent from the laser transmitting end. The photoelectric sensor senses this signal and sends the signal to the system control part. The system receives the signal of the photoelectric switch and confirms that it is in the retinal detection mode at this time.

[0077] When the driving component 300 drives the movable plate 200 to move and the mirror group 10 to be switched moves to contact the support seat 700, the trigger part leaves the laser transmitting end and the receiving end of the photoelectric sensor. The photoelectric sensor senses this signal and sends the signal to the system control part. The system receives the signal of the photoelectric switch and the system is in the anterior segment detection mode.

[0078] The lens group switching device provided in this embodiment does not require manual operation and can ensure the coaxial accuracy of the optical axis during multiple switching processes; the rotating screw 320, the moving nut 330, the elastic component 400 and the nut fixing seat 210 and the magnets on the support seat 700 can realize flexible positioning during the movement of the lens group; the flexible locking method between the moving nut 330 and the moving plate 200 through the elastic component 400 can eliminate the radial load on the rotating screw 320 during the movement, thereby increasing the lens group switching speed by providing the motor speed.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A lens group switching device, characterized in that: include: A fixed body, the fixed body comprising a first flat plate (110) arranged along a first direction and a second flat plate (120) arranged along a second direction, the first direction and the second direction being perpendicular, a front mirror group (11) and a rear mirror group (12) being arranged on the first flat plate (110) at intervals along the first direction, an optical path being formed between the front mirror group (11) and the rear mirror group (12); A movable plate (200), on which the mirror group (10) to be switched is arranged, and the movable plate (200) is slidably connected to the fixed body; A driving component (300), wherein the driving force generated by the driving component (300) is capable of driving the movable plate (200) to move along a second direction, so that the to-be-switched mirror group (10) moves into the optical path or moves away from the optical path; An elastic member (400), one end of the elastic member (400) is connected to the moving end of the driving member (300), and the other end of the elastic member (400) is connected to the moving plate (200), so that the moving end of the driving member (300) is elastically connected to the moving plate (200).

2. The lens group switching device according to claim 1, characterized in that: The driving component (300) comprises a driving body (310), a rotating screw rod (320) and a moving nut (330); The driving body (310) is fixed on the second flat plate (120); One end of the rotating screw rod (320) is connected to the driving body (310), and the other end of the rotating screw rod (320) passes through the moving plate (200); The movable nut (330) is threadedly connected to the rotating screw rod (320), and the movable nut (330) is arranged on a side of the movable plate (200) away from the driving body (310); The rotating screw (320) is configured to be rotatable along its own axis, so as to drive the moving plate (200) to move along the axis of the rotating screw (320) through the moving nut (330).

3. The lens group switching device according to claim 2, characterized in that: A nut fixing seat (210) is provided on a side of the movable plate (200) away from the driving body (310); The movable nut (330) is arranged in the nut fixing seat (210); The elastic component (400) is disposed in the nut fixing seat (210), one end of the elastic component (400) is connected to the movable nut (330), and the other end of the elastic component (400) is connected to the inner wall of the nut fixing seat (210).

4. The lens group switching device according to claim 3, characterized in that: The nut fixing seat (210) comprises a connecting portion (211) and a supporting portion (212); One end of the connecting portion (211) is connected to the movable plate (200), and the other end of the connecting portion (211) is connected to the supporting portion (212); The moving nut (330) is movable between the moving plate (200) and the supporting portion (212), and one end of the elastic member (400) is connected to the supporting portion (212).

5. The lens group switching device according to claim 4, characterized in that: The support portion (212) is provided with a notch; The movable nut (330) comprises a brim (331) and a nut body (332) which are connected to each other, the brim (331) can abut against the movable plate (200), the nut body (332) is arranged through the notch, the elastic member (400) is sleeved on the nut body (332), and one end of the elastic member (400) away from the support portion (212) is connected to the brim (331).

6. The lens group switching device according to claim 5, characterized in that: The inner side wall of the connecting portion (211) is provided with a sliding protrusion (213); The brim (331) is provided with a sliding groove; The sliding protrusion (213) extends into the sliding groove so that the brim (331) moves along the sliding protrusion (213).

7. The lens group switching device according to claim 2, characterized in that: The second flat plate (120) is provided with a guide rail (500), and the guide rail (500) is arranged along the second direction; The movable plate (200) is provided with a sliding block (231), and the sliding block (231) is slidably connected to the guide rail (500), so that the movable plate (200) can slide along the guide rail (500).

8. The lens group switching device according to claim 7, characterized in that: The guide rail (500) and the driving member (300) are respectively arranged on two sides of the second flat plate (120); The movable plate (200) is provided with a notch (240), and the second flat plate (120) passes through the notch (240). The movable plate (200) has a first plate body (220) and a second plate body (230), and the notch (240) is formed between the first plate body (220) and the second plate body (230). The rotating screw (320) passes through the first plate body (220), and the sliding block (231) is arranged on the second plate body (230).

9. The lens group switching device according to claim 1, characterized in that: A sensor component (600) is disposed on the second flat plate (120); The movable plate (200) is provided with a sensor triggering portion (610); The sensor component (600) is configured to sense the sensor triggering portion (610) to determine the position of the moving plate (200).

10. The lens group switching device according to any one of claims 1 to 9, characterized in that: The lens group switching device also includes a support seat (700); The support seat (700) is arranged on the first flat plate (110), and the support seat (700) is located below the movable plate (200); when the movable plate (200) abuts against the support seat (700), the mirror group (10) to be switched is located in the optical path.

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