Connecting device
By introducing a limiting groove and a limiting protrusion into the connection device of the fiber optic loader, the problem of unreliable connection between the guide seat and the endoscope handle is solved, a stable and reliable connection is achieved, and manufacturing costs are reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2026-03-31
AI Technical Summary
The connection between the traditional fiber optic loader guide seat and the endoscope handle is unreliable, leading to unstable operation.
A connection device is designed, including a handle, a socket, a guide seat, and a rotating seat. Through the cooperation of the limiting groove and the limiting protrusion, the guide seat is axially locked in the socket to ensure a stable connection.
It improves the reliability of the connection device, simplifies the design and manufacturing process, and reduces manufacturing costs.
Smart Images
Figure CN224056080U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of medical devices, in particular to a connecting device. BACKGROUND
[0002] Diseases such as urinary system stones and digestive system stones are showing an upward trend year by year, which seriously threatens human health. In recent years, with the development of non-invasive treatment technology, endoscope equipment combined with laser lithotripsy equipment has become an important means of stone treatment. In the process of laser lithotripsy treatment, the optical fiber is loaded and fixed by the optical fiber loader, so that the head of the optical fiber enters the camera at the front end of the endoscope equipment through the endoscope equipment. The operator can judge the distance between the head of the optical fiber and the stone through the image collected by the camera fed back on the display screen, and the energy emitted by the laser is acted on the stone through the head of the optical fiber, so as to realize the crushing of the stone. In the treatment process, the guide seat of the optical fiber loader needs to be installed on the handle of the endoscope equipment, but for the traditional structure design, it usually leads to the defect that the connection and locking of the guide seat are unreliable. CONTENT OF THE UTILITY MODEL
[0003] One of the technical problems solved by the present application is how to improve the reliability of the connecting device.
[0004] A connecting device, comprising:
[0005] a handle;
[0006] a socket inserted in the handle;
[0007] a guide seat inserted in the socket; and
[0008] a rotating seat abutting between the socket and the handle along the axial direction of the socket, the rotating seat being rotationally sleeved outside the guide seat, one of the rotating seat and the guide seat being provided with a limiting groove and the other being provided with a limiting protrusion, the limiting groove being recessed along the radial direction of the socket, and the limiting protrusion being protruded along the radial direction of the socket, when the limiting protrusion abuts against the inner side wall surface of the socket away from the handle in the case that the rotating seat rotates relative to the guide seat, the guide seat is locked in the axial direction of the socket.
[0009] In one of the embodiments, the limiting groove is provided on the inner side wall surface of the rotating seat, the guide seat comprises a seat body inserted in the socket, and the limiting protrusion is protruded on the outer side circumferential surface of the seat body.
[0010] In one of the embodiments, the rotating seat is recessed on the end surface of the handle and has an avoiding gap communicating with the limiting slot, when the avoiding gap and the limiting protrusion are aligned along the circumference of the socket, the rotating seat is in the unlocking position, and the guide seat can move in the avoiding gap along the axial direction of the socket.
[0011] In one of the embodiments, a locking stopper is further included, the locking stopper is arranged in the limiting slot and fixedly connected with the rotating seat, when the limiting protrusion abuts against the locking stopper along the circumference of the socket, the rotating seat is in the target locking position, and the guide seat is axially locked.
[0012] In one of the embodiments, the number of the limiting protrusion, the locking stopper and the avoiding gap is two, and they are arranged at intervals along the circumference of the socket, when the two limiting protrusions abut against the different locking stoppers along the circumference of the socket, the rotating seat is in the target locking position, and when the two limiting protrusions are aligned with the different avoiding gaps along the circumference of the socket, the rotating seat is in the unlocking position.
[0013] In one of the embodiments, the interval angle of the two limiting protrusions along the circumference of the socket is 180°, and the interval angle of the two locking stoppers along the circumference of the socket is 180°.
[0014] In one of the embodiments, an unlocking stopper is further included, the locking stopper is arranged in the limiting slot and fixedly connected with the rotating seat, when the rotating seat moves from the target locking position to the unlocking position, the limiting protrusion abuts against the unlocking stopper along the circumference of the socket.
[0015] In one of the embodiments, a positioning member extending along the axial direction of the socket is further included, one of the socket and the guide seat is provided with a positioning slot, and the other is fixedly connected with the positioning member, when the rotating seat is in the unlocking position, the positioning slot cooperates with the positioning member.
[0016] In one of the embodiments, a damping member is further included, the damping member surrounds the socket, and the damping member abuts between the rotating seat and the handle along the axial direction of the socket.
[0017] In one of the embodiments, at least one of the following solutions is further included:
[0018] The rotating seat is provided with a reference mark, the handle is provided with a locking mark and an unlocking mark, the guide seat is axially locked when the reference mark is aligned with the locking mark along the circumference of the socket, and the guide seat is axially unlocked when the reference mark is aligned with the unlocking mark along the circumference of the socket;
[0019] The socket comprises an insertion part and a flange part, the insertion part is inserted into the handle, the flange part is provided at one end of the insertion part and protrudes along the radial direction of the socket, the flange part is accommodated in the limiting groove, and the rotating seat is sleeved outside the insertion part and abuts between the handle and the flange part along the axial direction of the socket.
[0020] One technical effect of one embodiment of the present application is that by rotating the rotating seat, the limiting protrusion is away from the abutment of the limiting groove and the inner side wall surface of the handle, the guide seat is axially locked in the socket, the guide seat is effectively prevented from being pulled out of the socket, a stable and reliable connection relationship is formed between the guide seat and the handle, and the reliability of the connection device is finally improved. At the same time, the structure of the connection device can be connected, thereby simplifying the design and manufacturing difficulty of the connection device, and finally reducing the manufacturing cost of the connection device. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 The connection device provided in one embodiment is shown in the perspective structural schematic diagram.
[0022] Figure 2 The connection device is shown in the perspective structural schematic diagram. Figure 1 The connection device is shown in the perspective sectional structural schematic diagram.
[0023] Figure 3 The socket in the connection device is shown in the perspective structural schematic diagram. Figure 1 The socket in the connection device is shown in the perspective sectional structural schematic diagram.
[0024] Figure 4 The guide seat in the connection device is shown in the perspective structural schematic diagram. Figure 1 The guide seat in the connection device is shown in the perspective sectional structural schematic diagram.
[0025] Figure 5 The rotating seat in the connection device is shown in the perspective structural schematic diagram. Figure 1 The rotating seat in the connection device is shown in the perspective structural schematic diagram.
[0026] Figure 6 The rotating seat in the connection device is shown in the perspective sectional structural schematic diagram. Figure 1 The rotating seat in the connection device is shown in the perspective sectional structural schematic diagram.
[0027] Figure 7 The rotating seat in the connection device is shown in the perspective sectional structural schematic diagram. Figure 1 The rotating seat in the connection device is shown in the perspective sectional structural schematic diagram.
[0028] Figure 8 The rotating seat in the connection device is shown in the perspective sectional structural schematic diagram. Figure 1The local cross-sectional structure diagram of the connecting device when the rotating seat is counterclockwise rotated to the target locking position.
[0029] Figure 9 For Figure 1 The local cross-sectional structure diagram of the connecting device when the rotating seat is clockwise rotated to the unlocking position.
[0030] The local cross-sectional structure diagram of the connecting device when the rotating seat is clockwise rotated to the unlocking position. DETAILED DESCRIPTION
[0031] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described and it is therefore contemplated to cover all such modifications as fall within the scope of the application. It is also to be understood that the terminology used herein is for the purpose of describing the present application and should not be regarded as limiting.
[0032] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0033] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.
[0034] In the present application, unless specifically defined otherwise, the terms "mounting", "connected", "connecting", "fixed", and the like, should be construed broadly and can be understood as intended to encompass the various interconnections between elements, which can be direct or indirect, and that the connecting can be mechanical, electrical, or any combination thereof. Further, the terms "on", "above", "under", "below", and the like, can be construed to be taken relative to a given element and can indicate either a direct attachment to, or indirect attachment (with one or more intervening elements) to, the given element. Such terms indicate a positional relationship between elements.
[0035] In the present application, unless specifically defined otherwise, if there is a description of a first feature "on" or "under" a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "on", "above", and "over" the second feature can be that the first feature is directly above or obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below", and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.
[0036] It should be noted that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or there can be an intervening element. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used herein are intended for purposes of explanation only and are not intended to be limiting.
[0037] Referring to Figure 1 , Figure 2 and Figure 6The connecting device 10 provided in an embodiment of the present application comprises a handle 100, a socket 200, a guide seat 300 and a rotating seat 400. The handle 100 is a component of an endoscope device. The guide seat 300 is a component of a fiber loader. The socket 200 is inserted into the handle 100. The guide seat 300 is inserted into the socket 200. The rotating seat 400 is abutted between the socket 200 and the handle 100 along the axial direction of the socket 200. The rotating seat 400 is rotatably sleeved outside the guide seat 300. One of the rotating seat 400 and the guide seat 300 is provided with a limiting groove 410, and the other is provided with a limiting protrusion 320. The limiting groove 410 is recessed along the radial direction of the socket 200. The limiting protrusion 320 is protruded along the radial direction of the socket 200. When the limiting protrusion 320 is abutted with the limiting groove 410 away from the inner side wall of the handle 100, the guide seat 300 is locked in the axial direction of the socket 200.
[0038] Referring to Figure 2 , Figure 3 and Figure 4 , in some embodiments, the socket 200 comprises an insertion part 210 and a flange part 220. The insertion part 210 is inserted into the handle 100. The flange part 220 is protruded along the radial direction of the socket 200 and arranged at one end of the insertion part 210. The rotating seat 400 is sleeved outside the insertion part 210. The rotating seat 400 is abutted between the handle 100 and the flange part 220 along the axial direction of the socket 200. In this way, the fixed connection of the rotating seat 400 relative to the handle 100 can be achieved.
[0039] Referring to Figure 2 , Figure 6 and Figure 7 , in some embodiments, the rotating seat 400 is substantially annular. The guide seat 300 is arranged through the rotating seat 400, so that the rotating seat 400 is rotatably sleeved outside the guide seat 300. The limiting groove 410 can be arranged on the rotating seat 400. The limiting groove 410 can be formed by recessing the inner side wall of the rotating seat 400 along the radial direction of the socket 200 to a certain depth. The limiting groove 410 is spaced from the two end faces in the axial direction of the rotating seat 400. Therefore, the limiting groove 410 has two inner side walls, which are respectively referred to as a first inner side wall 411 and a second inner side wall 412 for the convenience of description. The first inner side wall 411 and the second inner side wall 412 are arranged spaced apart along the axial direction of the socket 200. The first inner side wall 411 is arranged away from the handle 100 along the axial direction of the socket 200. The second inner side wall 412 is arranged close to the handle 100 along the axial direction of the socket 200. The flange part 220 of the socket 200 extends into the limiting groove 410, so that the flange part 220 is abutted with the second inner side wall 412. In this way, the rotating seat 400 is abutted between the handle 100 and the flange part 220 along the axial direction of the socket 200.
[0040] Referring to Figure 2 and Figure 7 In some embodiments, the connecting device 10 further comprises a damping member 530, which can be a sealing ring or the like, and the damping member 530 abuts between the end surface of the handle 100 and the rotating seat 400 in the axial direction, so that a certain friction force is generated between the damping member 530 and the rotating seat 400. When the rotating seat 400 is rotated to a specified position, the rotating seat 400 can be positioned by the friction force between the damping member 530 and the rotating seat 400, so as to avoid the rotating seat 400 from continuing to rotate and leaving the specified position.
[0041] Referring to Figure 2 , Figure 6 and Figure 7 In some embodiments, the rotating seat 400 is provided with an avoidance gap 420, which is recessed from the end surface of the rotating seat 400 axially away from the handle 100, and the avoidance gap 420 simultaneously penetrates the first inner side wall surface 411 of the limiting groove 410 and the inner side wall surface of the rotating seat 400, so that the avoidance gap 420 communicates with the limiting groove 410, and the avoidance gap 420 is not closed along the circumferential direction of the socket 200. The guide seat 300 comprises a seat body 310 and a limiting protrusion 320, the seat body 310 is arranged in the rotating seat 400, and the seat body 310 can be inserted into the socket 200, and the limiting protrusion 320 is arranged on the outer side surface of the seat body 310 in the radial direction of the seat body 310. When the limiting protrusion 320 is aligned with the avoidance gap 420 along the circumferential direction of the socket 200, the limiting protrusion 320 will lack the abutting and interfering action of the first inner side wall surface 411 of the limiting groove 410, so that the limiting protrusion 320 can move along the axial direction of the socket 200 into the limiting groove 410 through the avoidance gap 420, and obviously, the limiting protrusion 320 can also move from the limiting groove 410 to the outside of the rotating seat 400 through the avoidance gap 420. In other embodiments, the limiting groove 410 can be arranged on the guide seat 300, and the rotating seat 400 can comprise the limiting protrusion 320.
[0042] Referring to Figure 2 , Figure 6 and Figure 7Therefore, in the process of rotating the rotating seat 400 relative to the guiding seat 300, the limiting protrusion 320 will generate rotation in the limiting groove 410, and when the avoiding gap 420 moves to a position along the circumference of the socket 200 and is aligned with the limiting protrusion 320, the position can be recorded as an unlocking position, that is, the rotating seat 400 is in the unlocking position, at this time, the rotating seat 400 will lose the axial locking effect on the guiding seat 300, so that the guiding seat 300 can move along the axial direction of the socket 200 relative to the socket 200 and move away from the rotating seat 400 and the socket 200 through the avoiding gap 420. In a popular way, the guiding seat 300 can be pulled out of the socket 200 and the rotating seat 400. When the avoiding gap 420 moves to a position along the circumference of the socket 200 and is misaligned at a certain angle with the limiting protrusion 320, the position is recorded as a locking position, that is, the rotating seat 400 is in the locking position, the first inner side wall surface 411 of the limiting groove 410 will generate abutting and interfering effect with the limiting protrusion 320, so that the rotating seat 400 plays an axial locking effect on the guiding seat 300, and then the guiding seat 300 cannot be pulled out of the socket 200 and the rotating seat 400. Obviously, in the assembly process of the connecting device 10, in order to insert the guiding seat 300 into the socket 200, the limiting protrusion 320 also needs to be aligned with the avoiding gap 420, otherwise the guiding seat 300 cannot be inserted into the socket 200.
[0043] Referring to Figure 2 , Figure 6 and Figure 7 In some embodiments, the connecting device 10 further comprises a locking stop 510, which can be columnar, the locking stop 510 extends along the axial direction of the socket 200 for a certain length, the locking stop 510 is arranged in the limiting groove 410, and both ends of the locking stop 510 are fixedly connected with the rotating seat 400. In the process of rotating the rotating seat 400 away from the unlocking position, when the locking stop 510 abuts against the limiting protrusion 320 along the circumference of the socket 200, the rotating seat 400 cannot continue to move away from the unlocking position in the same direction, at this time, the rotating seat 400 moves to the target locking position. It can be understood that as long as the limiting protrusion 320 and the avoiding gap 420 are misaligned in the circumference of the socket 200, the rotating seat 400 is in the locking position, and the guiding seat 300 is axially locked and cannot be pulled out. However, in order to operate conveniently, a special position in the locking position is recorded as the target locking position, when the rotating seat 400 moves to the target locking position, the guiding seat 300 is in the axial locking state. In fact, when the locking stop 510 abuts against the limiting protrusion 320, even under the action of a larger rotation torque, the rotating seat 400 cannot continue to rotate away from the unlocking position, at this time, the operator can know that the rotating seat 400 moves to the target locking position according to the strength required for rotation.
[0044] In some embodiments, the number of the limiting protrusions 320, the locking stoppers 510 and the avoiding gaps 420 is equal and is two. The two limiting protrusions 320 are arranged along the circumference of the socket 200 at intervals, the two locking stoppers 510 are arranged along the circumference of the socket 200 at intervals, and the two avoiding gaps 420 are arranged along the circumference of the socket 200 at intervals. During the rotation of the rotating seat 400 away from the unlocking position, when the two limiting protrusions 320 respectively abut against different locking stoppers 510 along the circumference of the socket 200, the rotating seat 400 cannot continue to rotate, at this time, the rotating seat 400 moves to the target locking position. During the rotation of the rotating seat 400 away from the target locking position, when the two limiting protrusions 320 respectively align with different avoiding gaps 420 along the circumference of the socket 200, the rotating seat 400 moves to the unlocking position. The interval angle of the two limiting protrusions 320 along the circumference of the socket 200 is 180°, and the interval angle of the two locking stoppers 510 along the circumference of the socket 200 is 180°. The interval directions of the two locking stoppers 510 and the interval directions of the two avoiding gaps 420 can be perpendicular to each other.
[0045] Referring to Figure 2 , Figure 6 and Figure 7 In some embodiments, the connecting device 10 further comprises an unlocking stopper 520, which can have the same structure as the locking stopper 510, i.e., the unlocking stopper 520 can be a columnar shape, the unlocking stopper 520 extends along the axial direction of the socket 200 for a certain length, the unlocking stopper 520 is arranged in the limiting groove 410, and both ends of the unlocking stopper 520 are fixedly connected with the rotating seat 400. The unlocking stopper 520 is arranged close to the avoiding gap 420. When the rotating seat 400 moves from the target locking position to the unlocking position, the limiting protrusion 320 abuts against the unlocking stopper 520 along the circumference of the socket 200, avoiding the rotating seat 400 from continuing to rotate relative to the guide seat 300, thereby avoiding the avoiding gap 420 and the limiting protrusion 320 being misaligned at intervals along the circumference, ensuring that the avoiding gap 420 and the limiting protrusion 320 are aligned along the circumference, and ensuring that the guide seat 300 can be pulled out of the socket 200 and the rotating seat 400 through the avoiding gap 420.
[0046] Referring to Figure 2 and Figure 5In some embodiments, the connecting device 10 can further comprise a positioning member 540 extending axially along the socket 200 by a certain length, one of the socket 200 and the guide base 300 is provided with a positioning groove 211 and the other is fixedly connected with the positioning member 540. For example, the positioning member 540 can be inserted into the guide base 300 and fixedly connected with the guide base 300, the positioning groove 211 is arranged on the inner side wall surface of the insertion portion 210 of the socket 200, and in the assembly process of the guide base 300, the positioning groove 211 cooperates with the positioning member 540 when the rotating seat 400 is in the unlocked position. Through the cooperation of the positioning groove 211 and the positioning member 540, on the one hand, the rotation of the guide base 300 relative to the socket 200 can be effectively avoided, thereby well limiting the guide base 300 along the circumference of the socket 200. On the other hand, it can also play a "foolproof" role, that is, only when the positioning member 540 and the positioning groove 211 are aligned along the circumference of the socket 200, the guide base 300 can be inserted into the socket 200. In other embodiments, the positioning groove 211 can be arranged on the guide base 300, and the positioning member 540 is fixedly connected with the socket 200.
[0047] In some embodiments, the rotating seat 400 is provided with a reference mark 430, and the handle 100 is provided with a locking mark 110 and an unlocking mark 120, when the reference mark 430 is aligned with the locking mark 110 along the circumference of the socket 200, the rotating seat 400 is in the target locking position, and the guide base 300 is axially locked; when the reference mark 430 is aligned with the unlocking mark 120 along the circumference of the socket 200, the rotating seat 400 is in the unlocked position, and the guide base 300 is axially unlocked. The reference mark 430, the locking mark 110 and the unlocking mark 120 can all be hole structures or protruding structures, as long as they can play a marking role. Therefore, by arranging the reference mark 430, the locking mark 110 and the unlocking mark 120, the operator can more intuitively judge whether the rotating seat 400 is in the unlocked position or the locked position, thereby improving the convenience of operating the connecting device 10.
[0048] The operation principle of the connecting device 10 will be introduced below:
[0049] Referring to Figure 2 , Figure 8 and Figure 9, the rotation seat 400 is in the unlocking position. The limiting protrusion 320 of the guide seat 300 is aligned with the avoiding gap 420, and the positioning piece 540 is aligned with the positioning slot 211, then the limiting protrusion 320 moves along the avoiding gap 420 to be close to the handle 100, and the positioning piece 540 gradually inserts into the positioning slot 211. The rotation seat 400 is counterclockwise rotated from the unlocking position, when the reference mark 430 is aligned with the locking mark 110 along the circumference of the socket 200, the limiting protrusion 320 will also abut against the locking stopper 510 along the circumference of the socket 200, so the rotation seat 400 cannot continue to rotate counterclockwise, at this time, the rotation seat 400 is in the target locking position, and the guide seat 300 is axially locked. When it is needed to release the axial locking relationship of the guide seat 300, the rotation seat 400 can be clockwise rotated from the target locking position, when the reference mark 430 is aligned with the unlocking mark 120 along the circumference of the socket 200, the limiting protrusion 320 will also abut against the unlocking stopper 520 along the circumference of the socket 200, the rotation seat 400 cannot continue to rotate clockwise, so as to avoid the dislocation between the limiting protrusion 320 and the avoiding gap 420, thereby ensuring that the limiting protrusion 320 is aligned with the avoiding gap 420; at this time, the rotation seat 400 is in the unlocking position, when the guide seat 300 is pulled upward, the limiting protrusion 320 will move away from the handle 100 from the avoiding gap 420, and the positioning piece 540 will also exit from the positioning slot 211, so that the guide seat 300 is pulled out from the socket 200.
[0050] Therefore, by rotating the rotation seat 400, when the limiting protrusion 320 abuts against the first inner side wall surface 411 of the handle 100 away from the limiting slot 410, the guide seat 300 can be axially locked in the socket 200, which effectively prevents the guide seat 300 from being pulled out from the socket 200, so that a stable and reliable connection relationship is formed between the guide seat 300 and the handle 100, and finally the reliability of the connection device 10 is improved. At the same time, the connection device 10 will not have a complex structure, thereby simplifying the design and manufacturing difficulty of the connection device 10, and finally reducing the manufacturing cost of the connection device 10.
[0051] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.
[0052] The above embodiments only express several implementation ways of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.
Claims
1. A connection device, characterized in that The utility model relates to a handle, a socket, a guide seat and a rotating seat. The rotating seat is rotatably arranged outside the guide seat, one of the rotating seat and the guide seat is provided with a limiting slot, and the other is provided with a limiting protrusion. The limiting slot is recessed along the radial direction of the socket, and the limiting protrusion is protruded along the radial direction of the socket. When the limiting protrusion is in abutment with the limiting slot away from the inner side wall of the handle, the guide seat is locked in the axial direction of the socket. The limiting slot is arranged on the inner side wall of the rotating seat, and the guide seat comprises a seat body arranged in the socket. The limiting protrusion is protruded on the outer circumferential surface of the seat body.
2. The connection device according to claim 1, characterized in that The end surface of the rotating seat away from the handle is recessed to form an avoiding gap connected with the limiting slot.
3. The connection device according to claim 2, characterized in that When the avoiding gap and the limiting protrusion are aligned in the circumferential direction of the socket, the rotating seat is in an unlocked position, and the guide seat can move in the avoiding gap in the axial direction of the socket.
4. The connection device according to claim 3, characterized in that The utility model further comprises a locking stopper arranged in the limiting slot and fixedly connected with the rotating seat.
5. The connection device according to claim 4, characterized in that When the limiting protrusion is in abutment with the locking stopper in the circumferential direction of the socket, the rotating seat is in a target locking position, and the guide seat is axially locked.
6. The connection device according to claim 5, characterized in that The number of the limiting protrusion, the locking stopper and the avoiding gap is two, and they are arranged at intervals in the circumferential direction of the socket.
7. The connection device of claim 5, wherein When the two limiting protrusions are in abutment with different locking stoppers in the circumferential direction of the socket, the rotating seat is in the target locking position.
8. The connection device of claim 3, wherein When the two limiting protrusions are aligned with different avoiding gaps in the circumferential direction of the socket, the rotating seat is in the unlocked position.
9. The connection device of claim 1, wherein, The interval angle of the two limiting protrusions in the circumferential direction of the socket is 180°, and the interval angle of the two locking stoppers in the circumferential direction of the socket is 180°.
10. The connection device of claim 1, wherein, The utility model further comprises an unlocking stopper arranged in the limiting slot and fixedly connected with the rotating seat. When the rotating seat moves from the target locking position to the unlocked position, the limiting protrusion is in abutment with the unlocking stopper in the circumferential direction of the socket. The utility model further comprises a positioning member extending in the axial direction of the socket. One of the socket and the guide seat is provided with a positioning slot, and the other is fixedly connected with the positioning member. When the rotating seat is in the unlocked position, the positioning slot is matched with the positioning member. The utility model further comprises at least one of the following solutions: The rotating seat is provided with a reference mark, the handle is provided with a locking mark and an unlocking mark, the guide seat is axially locked when the reference mark is aligned with the locking mark along the circumference of the socket, and the guide seat is axially unlocked when the reference mark is aligned with the unlocking mark along the circumference of the socket; The socket comprises an insertion part and a flange part, the insertion part is inserted into the handle, the flange part is provided at one end of the insertion part and protrudes along the radial direction of the socket, the flange part is accommodated in the limiting groove, and the rotating seat is sleeved outside the insertion part and abuts between the handle and the flange part along the axial direction of the socket.