Connecting device

Abstract

The present invention relates to a connecting device. The connecting device comprises: an adapter and a connecting base; the adapter is used to connect with an imaging device, and a positioning groove is provided on the adapter; the connecting base comprises a first end for mounting a scale plate, and a second end for matching and connecting with the adapter, and a positioning structure matching with the positioning groove is provided on the second end; the positioning groove and the positioning structure are matched so that the adapter and the connecting base can be detachably connected. The connecting device provided by the present invention can prevent the scale from being compressed and deformed during the process of connecting to the imaging device, so as to ensure the accuracy of the image registration operation.

Description

Technical Field

[0001] The present invention relates to the technical field of connecting devices, and in particular to a connecting device. Background Art

[0002] In navigation surgery, a ruler used to provide a spatial position mark for the imaging device can be set on the imaging device for 2D scanning to complete image registration.

[0003] During the research process of directly installing the ruler on the imaging device, it was found that if the ruler is directly fixed on the imaging device by compression, the ruler will be deformed due to pressure, causing the actual distribution pattern of the ruler to deviate from the preset distribution pattern, affecting the accuracy of the image registration operation. Summary of the invention

[0004] The invention provides a ruler connecting device, which can prevent the ruler from being compressed and deformed during the process of being connected to an imaging device, so as to ensure the accuracy of image registration operation.

[0005] The present invention provides a connecting device, comprising: an adapter and a connecting base; wherein the adapter is used to connect with an imaging device, and a positioning groove is provided on the adapter; the connecting base comprises a first end for mounting a scale plate, and a second end for matching and connecting with the adapter, and a positioning structure matching with the positioning groove is provided on the second end; the positioning groove and the positioning structure are matched so that the adapter and the connecting base can be detachably connected.

[0006] In a first possible implementation, the positioning structure includes: a latch and a drive assembly connected to each other, the latch passing through the connection base, and the drive assembly being used to drive the latch to move between a first position inserted into the positioning slot and a second position disengaged from the positioning slot.

[0007] In combination with the above possible implementations, in a second possible implementation, the driving assembly includes: a guide seat connected to the connecting base, and a knob arranged on a side of the guide seat away from the connecting base; one end of the pin is connected to the knob, and the other end passes through the guide seat and the connecting base in sequence; wherein, the side of the guide seat away from the connecting base has a guide curved surface, and a slider is provided on the knob, and the slider abuts against the guide curved surface, so that when the slider moves along the guide curved surface, the knob can drive the pin to move between the first position and the second position.

[0008] In combination with the above possible implementations, in a third possible implementation, the drive assembly also includes: an elastic member, a limiting protrusion is provided at one end of the pin close to the positioning groove, and the elastic member is provided between the guide seat and the limiting protrusion, so that the pin moves from the second position to the first position or from the first position to the second position under the elastic force of the elastic member.

[0009] In combination with the above possible implementation methods, in a fourth possible implementation method, the guide curved surface includes a sloped surface and a rest surface connected successively, so that when the knob is rotated, the slider can move along the sloped surface and the rest surface in sequence and stop at the rest surface, and when the knob moves along the sloped surface and the rest surface in sequence, it drives the pin to move between the first position and the second position.

[0010] In combination with the above possible implementations, in a fifth possible implementation, the adapter is provided with multiple groups of positioning grooves, and the connecting base is provided with multiple groups of positioning structures in a one-to-one correspondence;

[0011] The adapter is provided with a threaded hole for cooperating with the bolt, and the threaded hole is penetrated by a bolt for pressing and fixing the adapter on the imaging device.

[0012] In combination with the above possible implementations, in a sixth possible implementation, the adapter is annular, and the connecting base is columnar or cylindrical.

[0013] In combination with the above possible implementation methods, in a seventh possible implementation method, the connecting base is cylindrical or cylindrical, and an end of the connecting base connected to the imaging device is provided with a accommodating groove for accommodating the imaging device; during assembly, the adapter is assembled on the inner wall of the accommodating groove of the connecting base and is sleeved on the imaging device.

[0014] In combination with the above possible implementation methods, in an eighth possible implementation method, one of the outer cylindrical surface of the adapter and the side of the connecting base opposite to the outer cylindrical surface of the adapter is provided with one or more limit grooves, and the other is provided with a limit pin matched with the one or more limit grooves, and the limit groove and the limit pin cooperate with each other to limit the relative movement of the adapter and the connecting base.

[0015] In combination with the above possible implementation methods, in a ninth possible implementation method, when the limit groove is provided on the adapter, the limit groove extends from the end face of the adapter along a preset path, and the two ends of the limit groove are located on different straight generatrixes of the outer cylindrical surface and on different directrixes of the outer cylindrical surface.

[0016] In combination with the above possible implementations, in a tenth possible implementation, the positioning groove is arranged at an end of the limiting groove away from the end surface of the adapter.

[0017] In combination with the foregoing possible implementations, in an eleventh possible implementation, the limiting groove is an L-shaped groove, and the positioning groove is a round groove or a square groove.

[0018] The connecting device provided by the present invention connects the ruler to the imaging device through a connecting base and an adapter. The adapter and the connecting base are connected through a positioning groove and a positioning structure, so that the ruler installed on the connecting device can be detachably assembled to the imaging device to prevent the ruler from being deformed by force during installation on the imaging device, and keep the actual distribution pattern of the ruler the same as the preset distribution pattern, thereby ensuring the accuracy of the image registration operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Features, advantages, and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0020] Figure 1 is a schematic structural diagram of a connection device in a locked state at an angle according to an embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of the mechanism of the connection device of an embodiment of the present invention when the adapter and the connection base are not connected;

[0022] Figure 3 is a schematic cross-sectional structural diagram of a connection device in a locked state according to an embodiment of the present invention;

[0023] Figure 4 is a partial cross-sectional structural schematic diagram of the connecting device in a locked state according to an embodiment of the present invention;

[0024] Figure 5 It is a partial cross-sectional structural schematic diagram of the connection device of an embodiment of the present invention in an unlocked state.

[0025] Figure 6 is an assembly schematic diagram of a positioning structure of a connecting device according to an embodiment of the present invention;

[0026] Figure 7 is another assembly schematic diagram of the positioning structure of the connecting device according to an embodiment of the present invention;

[0027] Figure 8 is a schematic structural diagram of a knob of a connecting device according to an embodiment of the present invention;

[0028] Description of reference numerals:

[0029] 100, adapter; 200, connecting base; 300, positioning groove; 400, positioning structure; 410, guide seat; 411, guide curved surface; 412, rest surface; 420, latch; 430, knob; 431, slider; 440, elastic member; 500, limit groove; 600, limit pin; 700, threaded hole;

[0030] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0031] The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention, that is, the present invention is not limited to the described embodiments.

[0032] In the description of the present invention, it should be noted that, unless otherwise specified, "plurality" means two or more than two; the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0034] In order to better understand the present invention, Figure 1 and Figure 2 The connecting device according to the embodiment of the present invention is described in detail.

[0035] Figure 1 A schematic diagram showing the structure of the connecting device in a locked state according to an embodiment of the present invention is shown; Figure 2 The schematic diagram of the structure of the connection device according to the embodiment of the present invention at an angle is shown when the adapter and the connection base 200 are not connected.

[0036] like Figure 1 and Figure 2 The present invention provides a connection device, including: an adapter 100 and a connection base 200. The adapter 100 is used to connect with an imaging device, and a positioning groove 300 is provided on the adapter 100. The connection base 200 includes a first end for mounting a scale plate so that the scale plate is located in the imaging area of ​​the imaging device, and a second end for connecting with the adapter 100, and a positioning structure 400 is provided on the second end to cooperate with the positioning groove 300; the positioning groove 300 and the positioning structure 400 are adapted to enable the adapter 100 to be detachably connected to the connection base 200.

[0037] In an embodiment of the present invention, the adapter 100 can be connected to the imaging device by connecting to an image intensifier. The adapter 100 can also be connected to the imaging device by connecting to an image capture device. The image capture device can be an X-ray transmitter. In some embodiments, the image capture device can be a C-arm device, such as a 2D-C arm or a 3D-C arm.

[0038] The connecting device provided by the present invention can be connected to the imaging device through the adapter 100, and connected to the ruler through the connecting base 200, and the adapter 100 and the connecting base 200 can be connected through the positioning groove 300 and the positioning structure 400, so that the ruler installed on the connecting device can be detachably set on the imaging device to prevent the ruler from being deformed by force during installation on the imaging device, and keep the actual distribution pattern of the ruler the same as the preset distribution pattern, thereby ensuring the accuracy of the image registration operation.

[0039] In some embodiments of the present invention, objects that are opaque to X-rays are arranged on the scale plate in a predetermined pattern to form marking points on the X-ray image.

[0040] As an optional embodiment, the adapter 100 is provided with a threaded hole 700 for matching with a bolt, and a bolt for pressing and fixing the adapter 100 on the imaging device is penetrated in the threaded hole 700. A plurality of threaded holes 700 may be provided. Furthermore, solid glue may be further used for bonding to ensure that the scale connection device is firmly connected to the imaging device. As an alternative, the adapter 100 may also be directly bonded and fixed on the imaging device.

[0041] As an optional embodiment, the adapter 100 is used to connect with the imaging device, and is used to connect the scale plate to the imaging area of ​​the imaging device, and its shape is adapted to the corresponding connection of the imaging device. For example, when connected with the image intensifier, the adapter 100 can be annular, and the corresponding connection base 200 can be cylindrical.

[0042] As an optional embodiment, the connection base 200 can also be cylindrical, and a receiving groove is provided on one end of the connection base 200 connected to the imaging device, for receiving the imaging device; during assembly, the adapter 100 is assembled to the inner wall of the receiving groove of the connection base 200, and is sleeved on the imaging device. Specifically, the receiving groove can be used to receive an image intensifier, and the adapter 100 can be sleeved on the image intensifier. The structure of the receiving groove is adapted to the corresponding connection of the imaging device, such as the image intensifier.

[0043] In some embodiments of the present invention, based on the conventional cylindrical image intensifier, the connection base 200 can be a cylindrical structure, and the receiving groove is a circular groove. Setting the connection base 200 to be cylindrical can reduce the volume of the connection base 200, reduce the mass of the connection device, and facilitate connection with the image intensifier.

[0044] In other embodiments of the present invention, the connection base 200 may also be in the shape of a polygonal column or a square cylinder.

[0045] In some embodiments of the present invention, the outer wall of the connection base 200 can be hollowed out to reduce the mass and weight of the connection device. As an optional embodiment, a plurality of weight-reducing holes are provided on the outer wall of the connection base 200. In an embodiment of the present invention, six weight-reducing holes are evenly provided on the outer cylindrical surface of the connection base 200.

[0046] As an optional embodiment, the adapter 100 can be formed by connecting at least two connection units. Specifically, multiple connection units can be detachably connected to form the adapter 100. During use, the operator can install multiple connection units on the imaging device respectively, and then assemble the multiple connection units together to avoid blocking the installation of the adapter ring when the edge of the imaging device is provided with a radial protrusion structure, simplifying the installation process, reducing the diameter of the connection ring, and reducing the volume of the connection device.

[0047] As another optional implementation, the adapter 100 may also be integrally formed.

[0048] Since the spatial position of the scale also needs to be obtained during the image registration process, in the embodiment of the present invention, a tracer component may be further provided on the side wall of the connection device, so that the spatial position finder can obtain the spatial position of the connection base 200 by detecting the tracer component, thereby calculating the spatial position of the scale. Specifically, the tracer component may be an infrared transmitter or an infrared reflective ball.

[0049] In the embodiment of the present invention, the inner wall of the connection base 200 may be provided with a wiring groove for placing the wires used by the infrared transmitter.

[0050] In some embodiments of the present invention, the adapter 100 is first connected to the imaging device, or the adapter 100 can be fixedly installed on the imaging device to reduce the number of disassembly; then, the connecting base 200 is connected to the adapter 100. The adapter 100 and the connecting base 200 can be connected by the cooperation of the positioning groove 300 and the positioning structure 400.

[0051] As an optional embodiment, the positioning structure 400 may include: an interconnected pin 420 and a drive assembly, the pin 420 passes through the connection base 200, and the drive assembly is used to drive the pin 420 to move between a first position inserted into the positioning groove 300 and a second position disengaged from the positioning groove 300.

[0052] Figure 3 A schematic cross-sectional view of the connecting device in an unlocked state according to an embodiment of the present invention is shown; Figure 4 A schematic diagram of a partial structure of a connecting device in an unlocked state according to an embodiment of the present invention is shown; Figure 5 A partial structural schematic diagram of the connecting device in a locked state according to an embodiment of the present invention is shown.

[0053] like Figures 3 to 5 When the latch 420 is in the first position, the latch 420 is inserted into the positioning groove 300, the adapter 100 and the connection base 200 are fixed to each other, and the connection device is in a locked state. When the latch 420 is in the second position, the latch 420 is disengaged from the positioning groove 300, the connection device is in an unlocked state, and the connection base 200 can be disengaged from the adapter 100.

[0054] Figure 6 A schematic assembly diagram of a positioning structure 400 of a connecting device according to an embodiment of the present invention is shown. Figure 7 Another schematic assembly diagram of the positioning structure 400 of the connecting device according to the embodiment of the present invention is shown. Figure 8 A schematic structural diagram of a knob 430 according to an embodiment of the present invention is shown.

[0055] like Figures 6 to 8 As an optional embodiment, the driving assembly includes: a guide seat 410 connected to the connection base, and a knob disposed on the side of the guide seat 410 away from the connection base 200, and a latch 420 passes through the guide seat 410 and is connected to the knob 430; wherein, the side of the guide seat 410 away from the connection base 200 has a guide curved surface 411, and a slider 431 is disposed on the knob, and the slider 431 abuts against the guide curved surface 411, so that when the slider 431 moves along the guide curved surface 411, the knob 430 can drive the latch 420 to move between the first position and the second position. Specifically, the latch 420 can be fixedly connected to the knob 430 or detachably connected, for example, by a threaded connection.

[0056] As an alternative, the drive assembly includes a guide seat 410 provided with an internal thread, and a knob 430 provided with an external thread, the pin 420 passes through the guide seat 410, one end of the pin 420 is connected to the knob 430, the guide seat 410 and the knob 430 are threadedly connected, and when the knob 430 rotates, it drives the pin 420 to move between the first position and the second position.

[0057] As an optional embodiment, the positioning structure 400 further includes an elastic member 440, and a limiting protrusion is provided at one end of the latch 420 close to the positioning groove 300, and the elastic member 440 is provided between the side where the guide seat 410 is connected to the connection base and the limiting protrusion, or between the inner wall of the connection base and the limiting protrusion. In one embodiment, the latch 420 has a tendency to move toward the first position, so that the latch 420 moves from the second position to the first position under the action of the elastic member 440. Or in other embodiments, the elastic member can also be configured to make the latch have a tendency to move toward the second position, so that the latch 420 moves from the first position to the second position under the action of the elastic member 440.

[0058] In some embodiments of the present invention, a groove for accommodating the elastic member 440 may be provided on the connection base 200, so that the elastic member 440 is disposed between the side where the guide base 410 is connected to the connection base and the limiting protrusion.

[0059] In some embodiments of the present invention, the elastic member 440 may be a compression spring, so that the latch 420 has a tendency to be inserted into the positioning slot 300, thereby preventing the latch 420 from being dislodged due to the action of the spring. In another embodiment of the present invention, the elastic member 440 may also be a rubber gasket.

[0060] As an optional implementation, the shape of the guide seat 410 can match the shape of the adapter 100, and can be columnar, specifically cylindrical.

[0061] As an optional embodiment, the guide curved surface 411 includes a bevel and a rest surface 412 connected in series, so that when the knob 430 rotates, the slider 431 can move along the bevel and the rest surface 412 in sequence and stop on the rest surface 412, and when the knob 430 moves along the bevel and the rest surface 412 in sequence, it drives the pin 420 to move between the first position and the second position.

[0062] As an optional implementation, rest surfaces 412 are respectively provided at both ends of the guide curved surface 411. Figure 7 The guide curved surface 411 may include a connected rest surface 412, an inclined surface and a rest surface 412, so that the slider 431 can be in a state of being held by the rest surface 412 after being locked and unlocked, and the inclined surface drives the latch 420 to move during the unlocking process or the locking process. The structural design of the combination of the guide curved surface 411 and the slider facilitates the operator to adjust the position between the adapter 100 and the connection base 200.

[0063] Specifically, in some embodiments of the present invention, the rest surface 412 may be a plane perpendicular to the axis of the latch 420. When the slider 431 abuts against the rest surface 412, the friction between the slider 431 and the rest surface 412 prevents the slider 431 from sliding relative to the guide curved surface 411, thereby locking the position of the slider 431, thereby locking the matching state between the latch 420 and the positioning groove 300, and keeping them in a locked state or an unlocked state. In another embodiment of the present invention, the rest surface 412 may also be a curved surface.

[0064] In some embodiments of the present invention, the guide seat 410 is symmetrically provided with a plurality of guide curved surfaces 411 along the axis of the latch 420, and the knob 430 is correspondingly provided with a plurality of sliders 431. In this way, the locking or unlocking process is more stable and the connection device is more stable.

[0065] In some embodiments of the present invention, the inner wall of the connecting base 200 and the outer wall of the adapter 100 can also be fitted together, so that the connecting base 200 can only move along the axial direction of the connecting base 200 and rotate around the axis of the connecting base 200 relative to the adapter 100, and the relative position between the connecting base 200 and the adapter 100 can be fixed by the cooperation of a positioning groove 300 and a positioning structure 400.

[0066] like Figures 6 to 8 As an optional implementation, a plurality of positioning grooves 300 are provided on the adapter 100, and a plurality of positioning structures 400 are provided on the connecting base 200 in a one-to-one correspondence.

[0067] When the number of the positioning grooves 300 and the positioning structures 400 is more than three and they are arranged around the adapter 100, when the connection base 200 is not in contact with the adapter 100, the relative position between the connection base 200 and the adapter 100 can be fixed by the mutual cooperation of the positioning grooves 300 and the positioning structures 400. Since the connection is made through a plurality of positioning grooves 300 and positioning structures 400, the adapter 100 and the connection base 200 do not need to be limited by mutual contact, thereby reducing the contact area between the adapter 100 and the connection base 200, and further reducing the volume of the adapter 100 and the connection base 200, so as to reduce the overall mass of the connection device and reduce the burden on the imaging device.

[0068] In other embodiments of the present invention, there may be only one positioning groove 300 and one positioning structure 400, and auxiliary positioning is performed by setting a fixed limit pin and the cooperation between the limit groove. Compared with the scheme of three positioning structures 400, the structure is simplified and the operation steps are simplified.

[0069] As an optional implementation, the positioning groove 300 is a circular groove or a square groove.

[0070] As an optional embodiment, the connecting base 200 is cylindrical or cylindrical, and the outer cylindrical surface of the adapter 100 and the side opposite to the outer cylindrical surface of the connecting base and the adapter 100 are provided with one or more limit grooves 500, and the other is provided with one or more limit pins 600 that are compatible with the limit grooves 500. The limit grooves 500 and the limit pins 600 are used to cooperate with each other to limit the axial translation of the adapter 100 along its own axis.

[0071] As an optional embodiment, when the limit groove 500 is set on the adapter 100, the limit groove 500 extends from the end face of the adapter 100 along a preset path, and the two ends of the limit groove are located on different straight generatrixes of the outer cylindrical surface and on different directrixes of the outer cylindrical surface.

[0072] As an optional implementation, the limiting groove 500 may be an L-shaped groove, including a circumferentially extending portion and an axially extending portion.

[0073] As an alternative, the limiting groove 500 can also be a spiral groove. The connection device firstly makes the connection base 200 only rotate in or out relative to the adapter 100 through the cooperation of the limiting groove 500 and the limiting pin 600, and then locks the relative position between the adapter 100 and the connection base 200 through the positioning groove 300 and the positioning structure 400.

[0074] During the use of the connection device, the limiting groove 500 and the limiting pin 600 cooperate to make the connection base 200 only rotate in the circumferential direction relative to the adapter 100, and then the relative position between the adapter 100 and the connection base 200 is locked by the positioning groove 300 and the positioning structure 400. The assembly direction of the connection base is limited by the limiting pin and the limiting groove, and then the positioning is performed by the positioning groove, so that the connection device can be simply and directionally transferred to the imaging device.

[0075] Furthermore, the angular interval between two adjacent limiting pins 600 is no greater than 180°.

[0076] As an optional implementation, the positioning groove 300 is disposed at an end of the limiting groove 500 away from the end surface of the adapter 100 .

[0077] During use, the latch 420 first enters the limiting groove 500, and after reaching the end of the limiting groove 500 away from the end surface of the adapter 100, the latch 420 is aligned with the positioning groove 300, and then the driving assembly drives the latch 420 to insert into the positioning groove 300, locking and fixing the relative position between the adapter 100 and the connecting base 200. It is convenient for the latch 420 to align with the positioning groove 300, and the latch 420 can also protrude from the inner cylindrical surface of the connecting base 200, without opening a groove on the connecting base 200 to place the elastic member 440.

[0078] As an optional implementation, the positioning groove 300 and the limiting groove 500 are blind grooves. As an alternative, the positioning groove 300 is a through hole, and the limiting groove 500 is a blind groove.

[0079] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims. Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention, and in particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A connecting device for connecting an imaging device and a scale plate in navigation surgery, characterized in that: include: An adapter, used to connect with an imaging device, wherein a positioning groove is provided on the adapter; The connecting base comprises a first end for mounting the scale plate, and a second end for connecting with the adapter, wherein the second end is provided with a positioning structure for matching with the positioning groove; the positioning groove and the positioning structure are adapted to enable the adapter to be detachably connected with the connecting base; A tracer component is provided on the side wall of the connecting device; The positioning structure comprises: a latch and a driving assembly connected to each other, the latch penetrating the connection base, and the driving assembly being used to drive the latch to move between a first position inserted into the positioning slot and a second position separated from the positioning slot; The drive assembly comprises: A guide seat connected to the connection base, and a knob arranged on a side of the guide seat away from the connection base; one end of the latch is connected to the knob, and the other end passes through the guide seat and the connection base in sequence; The side of the guide seat away from the connecting base has a guide curved surface, and the knob is provided with a slider, and the slider abuts against the guide curved surface, so that when the slider moves along the guide curved surface, the knob can drive the latch to move between the first position and the second position; The guide curved surface includes an inclined surface and a rest surface connected in series, so that the slider can move along the inclined surface and the rest surface in sequence when rotating and stop at the rest surface, and the knob drives the latch to move between the first position and the second position when moving along the inclined surface and the rest surface in sequence; The rest surface is a plane perpendicular to the axis of the latch, and when the slider abuts against the rest surface, the friction between the slider and the rest surface prevents the slider from sliding relative to the guide curved surface.

2. The connection device according to claim 1, characterized in that: The driving assembly also includes: an elastic member, a limiting protrusion is provided at one end of the latch pin close to the positioning groove, and the elastic member is arranged between the guide seat and the limiting protrusion, so that the latch pin moves from the second position to the first position or from the first position to the second position under the elastic force of the elastic member.

3. The connection device according to claim 1, characterized in that: The adapter is provided with a plurality of groups of the positioning grooves, and the connection base is provided with a plurality of groups of the positioning structures in a one-to-one correspondence; and / or The adapter is provided with a threaded hole for cooperating with a bolt, and a bolt for pressing and fixing the adapter on the imaging device is passed through the threaded hole.

4. The connection device according to any one of claims 1 to 3, characterized in that: The adapter is annular, and the connecting base is columnar or cylindrical.

5. The connection device according to claim 4, characterized in that: The connecting base is cylindrical or cylindrical, and one end of the connecting base connected to the imaging device is provided with a receiving groove for receiving the imaging device; During assembly, the adapter is assembled on the inner wall of the connection base receiving groove and sleeved on the imaging device.

6. The connection device according to claim 5, characterized in that: The outer cylindrical surface of the adapter and the side of the connecting base opposite to the outer cylindrical surface of the adapter are provided with one or more limit grooves, and the other is provided with a limit pin matched with the one or more limit grooves, and the limit groove and the limit pin cooperate with each other to limit the relative movement of the adapter and the connecting base.

7. The connection device according to claim 6, characterized in that: When the limiting groove is arranged on the adapter, the limiting groove extends from the end surface of the adapter along a preset path, and the two ends of the limiting groove are located on different straight generatrixes of the outer cylindrical surface and on different directrixes of the outer cylindrical surface.

8. The connection device according to claim 7, characterized in that The positioning groove is arranged at an end of the limiting groove away from the end surface of the adapter.

9. The connection device according to claim 8, characterized in that: The limiting groove is an L-shaped groove, and the positioning groove is a round groove or a square groove.

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