A support arm and medical device

Abstract

This application provides a support arm and a medical device. The support arm includes an arm body, a locking pin, and an anti-disengagement ring. The arm body has a connector with a locking groove and a sliding groove. The locking pin is inserted into the locking groove. The anti-disengagement ring has a mating structure. The sliding groove includes at least one first groove segment and at least one second groove segment arranged at an angle, one of which is a locking groove segment. When the mating structure moves within a groove segment other than the locking groove segment, the anti-disengagement ring blocks at least a portion of the locking groove. When the mating structure is located in the locking groove segment, the locking groove is exposed, allowing the locking pin to be inserted into or removed from the locking groove. The support arm provided by this application does not require screws or other fasteners, has a simple assembly method, and avoids the phenomenon of missing fasteners. It has high assembly stability and a high aesthetic appearance. It also reduces the inconvenience of fastener disinfection during disinfection and wiping.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more particularly to a support arm and a medical device. Background Technology

[0002] In related technologies, suspended medical devices, such as surgical lights, utilize a support arm connection. The connector on the lamp head inserts into the support arm, and a retaining pin is inserted radially into both the support arm and the connector. A decorative sleeve is then fitted around the support arm and secured to it with screws. However, after installing the decorative sleeve, the screws may be forgotten. During disinfection, wiping, or rotation of the surgical light, the decorative sleeve can easily shift axially, exposing the retaining pin. The risk of the retaining pin dislodging is significant and could lead to serious consequences. Summary of the Invention

[0003] In view of this, the embodiments of this application aim to provide a support arm and medical device that are simple to assemble, highly stable, and can reduce the risk of the locking pin falling off.

[0004] This application provides a support arm, including:

[0005] The arm body has a connector, the inside of which has a plug-in cavity for inserting the plug part of the suspension device. The side wall of the connector is provided with a slot and a sliding groove.

[0006] A locking pin is inserted into the slot and is used to cooperate with the plug-in part, so that the plug-in part is hooked onto the locking pin and the plug-in part can rotate relative to the connector;

[0007] An anti-detachment ring is movably fitted onto the outer periphery of the connector. The anti-detachment ring is provided with a mating structure that extends into the slide groove and is movable within the slide groove. The slide groove includes at least one first groove segment and at least one second groove segment arranged at an angle. The first groove segment has at least an axial length component in the connector, and the second groove segment has at least a circumferential length component in the connector. One of the at least one second groove segment is a locking groove segment.

[0008] When the mating structure moves within a groove outside the locking groove, the anti-disengagement ring blocks at least a portion of the slot to prevent the locking pin from disengaging.

[0009] When the mating structure is located in the locking groove section, the slot is exposed, allowing the locking pin to be inserted into or removed from the slot.

[0010] In some embodiments, the anti-detachment ring has an initial position in which it blocks the slot and the slide.

[0011] In some embodiments, when the mating structure is located in the locking groove section, the anti-detachment ring extends beyond the slot along the axial direction and away from the suspension device to expose the slot;

[0012] Alternatively, the anti-detachment ring may further include a clearance groove, in which the slot protrudes from the clearance groove when the mating structure is located in a preset area of ​​the locking groove section.

[0013] In some implementations, the mating structure is located at one end of the anti-detachment ring along the axial direction and close to the suspension device.

[0014] In some implementations, the outer surface of the anti-detachment ring forms part of the outer surface of the support arm.

[0015] In some embodiments, the bottom end of the connector has a shaft end face, and the groove extends through the shaft end face to form a notch on the shaft end face, so that during the installation or removal of the support arm, the mating structure can be inserted into or removed from the groove through the notch.

[0016] In some embodiments, the slot and the slide are not interconnected; and / or, the slot and the slide are spaced apart in the circumferential direction of the joint.

[0017] In some embodiments, the surface of the anti-detachment ring has axial rays intersecting the first and second groove segments, and the axial rays extend from the direction of the suspension device toward the direction of the first and second groove segments, wherein the angle between the first groove segment and the axial rays is smaller than the angle between the adjacent second groove segment and the axial rays.

[0018] In some implementations, the angle between the extension direction of the first groove and the axial direction of the joint is 0°±10°.

[0019] In some embodiments, the angle between the extension direction of the second groove and the axial direction of the joint is 90°±10°; and / or, the groove wall of the locking groove is provided with a notch, and the mating structure can fall into the notch under the gravity of the anti-detachment ring.

[0020] In some embodiments, the support arm further includes a reset structure, and the at least one first groove segment includes an initial groove segment, wherein the anti-detachment ring is in an initial position when the mating structure is at an extreme position near one end of the initial groove segment close to the suspension device.

[0021] The reset structure provides a reset force that brings the anti-detachment ring closer to the initial position, at least within the range of motion of the mating structure in the initial groove section and when the anti-detachment ring is deviated from the initial position.

[0022] In some implementations, the reset structure constantly provides a reset force within the travel range of the mating structure in the initial groove segment to move the anti-detachment ring closer to the initial position.

[0023] In some implementations, the reset structure includes a first magnetic element and a second magnetic element, wherein the first magnetic element is disposed on the connector and the second magnetic element is disposed on the anti-detachment ring;

[0024] The second magnetic element is located on the side of the first magnetic element closer to the suspension device, and the first magnetic element and the second magnetic element repel each other; or, the second magnetic element is located on the side of the first magnetic element away from the suspension device, and the first magnetic element and the second magnetic element attract each other.

[0025] In some implementations, the reset structure includes an elastic element, the two ends of which respectively engage with the anti-detachment ring and the connector, and the elastic element is in an energy storage state at least within the movement stroke range of the engaging structure in the initial groove section and when the anti-detachment ring is deviated from the initial position.

[0026] In some implementations, the elastic element is in an energy-storing state throughout the movement stroke of the mating structure in the initial groove section.

[0027] In some embodiments, the connector includes a housing and an inner tube, the housing being fitted around the outer periphery of the inner tube, the slot penetrating the sidewall of the housing and the sidewall of the inner tube; the sliding groove being disposed on the sidewall of the housing; and the elastic element being located in the space between the outer peripheral surface of the inner tube and the inner surface of the anti-detachment ring.

[0028] In some implementations, when the mating structure is located in the locking groove section, the elastic element separates from the anti-detachment ring.

[0029] In some implementations, within the travel range of the initial groove segment, one end of the elastic member is detachably held against the mating structure, and when the mating structure slides from the initial groove segment to the adjacent second groove segment, one end of the elastic member separates from the mating structure.

[0030] In some implementations, the support arm includes a switching element disposed at the joint and movable between a first state and a second state;

[0031] Within the stroke range of the initial groove section, the switching element is in the first state and separated from the elastic element;

[0032] When the mating structure slides from the initial groove segment to the adjacent second groove segment, one end of the elastic member separates from the mating structure, and the mating structure drives the switching member to switch from the first state to the second state. One end of the elastic member switches from a state of abutting against the mating structure to a state of abutting against the switching member.

[0033] In some embodiments, the connector includes a housing and an inner tube, the housing being fitted around the outer periphery of the inner tube, the slot penetrating the sidewall of the housing and the sidewall of the inner tube, and the sliding groove being disposed on the sidewall of the housing;

[0034] The support arm includes a mounting base disposed on the outer circumferential surface of the inner tube, the switching member is rotatably connected to the mounting base, and the two define a rotation axis, the side wall of the inner tube is provided with a receiving groove, and the switching member includes a first part and a second part located on opposite sides of the rotation axis.

[0035] When the switching element is in the first state, the first part extends into the receiving groove, and the second part extends into the second groove segment adjacent to the starting groove segment;

[0036] When the switching element is in the second state, the first part extends out of the receiving groove and into the starting groove section, and the second part extends out of the second groove section into the receiving groove.

[0037] In some embodiments, the switching element is a ferromagnetic element, and the support arm further includes a first magnetic attractor and a second magnetic attractor. The first magnetic attractor and the second magnetic attractor are disposed at both ends of the inner tube in the extension direction of the receiving groove. The first magnetic attractor provides a magnetic attraction force to the first part, bringing the first part closer to the first magnetic attractor, at least when the switching element is in a first state. The second magnetic attractor provides a magnetic attraction force to the second part, bringing the second part closer to the second magnetic attractor, at least when the switching element is in a second state.

[0038] In some embodiments, the number of the first groove segment is at least two, the number of the second groove segment is at least two, the first groove segment and the second groove segment are arranged alternately in the extension direction of the chute, and the locking groove segment is located at the end of the chute in the extension direction away from the suspension device.

[0039] This application provides a medical device, including:

[0040] Connecting arm;

[0041] Suspension device;

[0042] And the support arm of any embodiment of this application, wherein the connecting arm is connected to a plug-in portion, the outer periphery of the plug-in portion has a convex ring or a limiting ring groove, when the locking pin abuts against the bottom of the convex ring or is inserted into the limiting ring groove, the suspension device is hooked to the locking pin through the plug-in portion, and the suspension device can rotate relative to the connector.

[0043] In some implementations, the suspended device is a surgical light, a camera device, or a display device.

[0044] In this embodiment of the support arm, during assembly, the mating structure moves to the locking groove section, and the anti-detachment ring is fixed in position by the locking groove section, exposing the slot. The insertion part is inserted into the connector through the insertion cavity, and then the locking pin is inserted into the slot. The insertion part and the locking pin partially engage to achieve the engagement of the insertion part in the insertion cavity. After engagement, the mating structure moves along the groove section outside the locking groove section, at least generating axial displacement, which at least partially covers the slot, thereby blocking the locking pin and making it difficult for the locking pin to come out. At the same time, the engagement between the locking pin and the slot can also be hidden by the anti-detachment ring. In addition, the entire assembly process does not require the use of screws or other fasteners, the assembly method is simple, and there is no possibility of missing fasteners. The assembly stability is high, and the appearance is aesthetically pleasing. It also reduces the inconvenience of fastener disinfection during disinfection and wiping. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of a portion of the structure of the support arm and the connecting arm according to an embodiment of this application, wherein the locking pin has not yet been inserted into the slot, the switching component is in the second state, and the mating structure is set in the locking groove section and exposes the slot.

[0046] Figure 2 for Figure 1 A schematic diagram of a portion of the support arm shown.

[0047] Figure 3 This is an exploded view of a portion of the structure of a support arm according to an embodiment of this application;

[0048] Figure 4 This is a schematic diagram of the anti-detachment ring structure according to an embodiment of this application;

[0049] Figure 5 This is another structural schematic diagram of a support arm according to an embodiment of this application. The diagram omits some structures of the outer shell and the anti-detachment ring.

[0050] Figure 6 This is another structural schematic diagram of a support arm according to an embodiment of the present application, wherein the cooperating structure moves within the starting groove section and the switching member is in a first state;

[0051] Figure 7This is another structural schematic diagram of a support arm according to an embodiment of this application, wherein the cooperating structure moves within the second groove section and the switching member is in the second state.

[0052] Explanation of reference numerals in the attached figures

[0053] 100 - Support arm; 11 - Connector; 11a - Insertion cavity; 11b - Opening; 11c - Slot; 11d - Slide groove; 11e - First groove section; 11f - Initial groove section; 11g - Second groove section; 11h - Locking groove section; 11i - Notch; 111 - Outer shell; 112 - Inner tube; 112a - Receiving groove;

[0054] 12-Anti-detachment ring; 121-Matching structure; 13-Clamping pin; 14-Elastic element; 15-Switching element; 151-First part; 152-Second part; 16-Mounting base;

[0055] 200 - Connecting arm; 200a - Protruding ring; 201 - Insertion part. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0057] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this invention will not be described separately.

[0058] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0059] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0060] This application provides a support arm 100.

[0061] The support arm 100 is used to cooperate with the plug part 201 that connects to the suspension device.

[0062] Please see Figures 1 to 7 The support arm 100 includes the arm body, the locking pin 13, and the anti-detachment ring 12.

[0063] The arm body has a connector 11, and the inside of the connector 11 has a plug cavity 11a. The plug cavity 11a is used for the plug part 201 of the suspension device to be inserted. The plug part 201 is used to connect the suspension device to the support arm 100.

[0064] Specifically, please refer to Figure 5 The lower end of the insertion cavity 11a has an opening 11b, and the insertion part 201 is inserted into the insertion cavity 11a through the opening 11b.

[0065] The side wall of the connector 11 is provided with a slot 11c and a slide groove 11d. The locking pin 13 is inserted into the slot 11c and is used to cooperate with the plug part 201, so that the plug part 201 is hooked on the locking pin 13 and the plug part 201 can rotate relative to the connector 11.

[0066] In other words, a portion of the locking pin 13 can engage with the plug-in portion 201, and another portion can engage with the slot 11c to connect the support arm 100 to the plug-in portion 201. The engagement of the locking pin 13 with the plug-in portion 201 allows the plug-in portion 201, which connects to the suspension device, to be connected to the support arm 100 and to rotate relative to the connector 11. The plug-in portion 201 can then drive the suspension device to rotate relative to the connector 11, for example, at least 360°.

[0067] The shape of the locking pin 13 is adapted to the locking groove 11c, and the shape and size of the two are nearly identical. For example, the locking groove 11c can extend approximately circumferentially along the connector 11, that is, approximately fan-shaped, and the locking pin 13 can also be approximately fan-shaped.

[0068] Under the weight of the suspension device itself, the locking pin 13 bears part of the weight of the insertion part 201 and the suspension device, and then provides support for the insertion part 201 and the suspension device through the entire support arm 100 to increase the installation stability. At the same time, the angle and position can be adjusted by rotation to increase the convenience of medical operation.

[0069] The anti-detachment ring 12 is movably sleeved on the outer periphery of the connector 11. The anti-detachment ring 12 is provided with a mating structure 121, which extends into the slide groove 11d and can move in the slide groove 11d.

[0070] In other words, the anti-detachment ring 12 can move relative to the joint 11 through the engagement of the mating structure 121 and the slide groove 11d. The slide groove 11d can provide the mating structure 121 with movement space and movement guidance, so that the mating structure 121 moves along a preset trajectory.

[0071] It is understandable that the anti-detachment ring 12 can move in the slide groove 11d under the action of external force. The external force can be manual operation force or other forms, which are not limited here.

[0072] Please see Figure 2 and Figure 3 The groove 11d includes at least one first groove segment 11e and at least one second groove segment 11g arranged at an angle. The first groove segment 11e has at least an axial length component in the joint 11, and the second groove segment 11g has at least a circumferential length component in the joint 11. One of the at least one second groove segment 11g is a locking groove segment 11h.

[0073] Here, the first slot segment 11e and the second slot segment 11g are set at an angle, meaning that the first slot segment 11e and the second slot segment 11g are not parallel. When the cooperating structure 121 moves from the first slot segment 11e to the second slot segment 11g, it will undergo a change of direction, and the extension direction of the first slot segment 11e will be different from the extension direction of the second slot segment 11g. The included angle between the first slot segment 11e and the second slot segment 11g can be an acute angle, an obtuse angle, or a right angle, and there is no limitation here. For example, the included angle between the first slot segment 11e and the second slot segment 11g can be a right angle.

[0074] The first groove segment 11e has at least an axial length component in the joint 11, meaning that when the mating structure 121 moves along the first groove segment 11e, it will generate at least an axial displacement; the second groove segment 11g has at least a circumferential length component in the joint 11, meaning that when the mating structure 121 moves along the second groove segment 11g, it will generate at least a circumferential displacement.

[0075] It is understandable that the anti-detachment ring 12 can move axially and rotate circumferentially when it moves within the first groove 11e and the second groove 11g through the cooperation structure 121.

[0076] For example, the first groove segment 11e may extend along the axial direction of the connector 11.

[0077] For example, the second groove segment 11g may extend in the circumferential direction of the connector 11.

[0078] The number of first slot 11e and second slot 11g can be one, two, or more. The number of first slot 11e and second slot 11g can be the same or different. When there are multiple first slots 11e and second slots 11g, the first slots 11e and second slots 11g can be set alternately in sequence.

[0079] The locking groove section 11h is used to lock and position the mating structure 121, thereby achieving the locking and positioning of the anti-detachment ring 12.

[0080] When the mating structure 121 moves within a slot outside the locking slot 11h, the anti-disengagement ring 12 blocks at least a portion of the locking slot 11c to prevent the locking pin 13 from disengaging.

[0081] For example, when there is one first groove segment 11e and one second groove segment 11g, the second groove segment 11g is the locking groove segment 11h. The anti-detachment ring 12 can generate at least an axial displacement through the first groove segment 11e, thereby realizing an axial position change relative to the connector 11, thereby blocking at least a portion of the slot 11c.

[0082] For example, when there are multiple second groove segments 11g, the number of first groove segments 11e is unlimited. One of the second groove segments 11g is a locking groove segment 11h. The anti-detachment ring 12 can generate axial displacement through the first groove segment 11e and / or the second groove segment 11g, thereby realizing an axial position change relative to the connector 11, thereby blocking at least a portion of the slot 11c.

[0083] That is, when the mating structure 121 moves in the groove outside the locking groove 11h, it can at least produce axial displacement.

[0084] It is understandable that the anti-detachment ring 12 can be the entire structure of the blocking slot 11c, or it can be a part of the blocking slot 11c.

[0085] With the anti-detachment ring 12 blocking it, the locking pin 13 is not easy to come out. Thus, the locking pin 13 is not easy to detach from the plug part 201, thereby making the suspension device less likely to fall and improving the reliability and safety of the connection between the support arm 100 and the suspension device.

[0086] When the mating structure 121 is in the locking groove section 11h, the slot 11c is exposed so that the locking pin 13 can be inserted into or removed from the slot 11c.

[0087] Here, "slot 11c exposed" means that slot 11c is outside the shielding range of anti-detachment ring 12 and is exposed on the outer surface of connector 11. This facilitates the insertion or removal of locking pin 13, thereby making it easier to connect support arm 100 to plug-in part 201 or disconnect support arm 100 from plug-in part 201.

[0088] Here, when the slot 11c is exposed, the mating structure 121 is located in the locking groove section 11h. The anti-detachment ring 12 can be hooked into the locking groove section 11h and positioned by means of the mating structure 121. In this way, the position of the anti-detachment ring 12 can be fixed and will not loosen, thereby causing displacement along the axial and / or circumferential directions, which would affect the mating of the slot 11c and the locking pin 13.

[0089] Understandably, in related technologies, suspended medical devices, such as surgical lights, utilize a support arm connection. The connector on the lamp head inserts into the support arm, and a retaining pin is inserted radially into both the support arm and the connector. A decorative sleeve is then fitted around the support arm and secured with screws. However, after installing the decorative sleeve, screws may be forgotten. During disinfection, wiping, or rotation of the surgical light, the decorative sleeve can easily shift axially, exposing the retaining pin. This poses a significant risk of the retaining pin dislodging, potentially leading to serious consequences. Furthermore, after screw installation, the screw mounting area is prone to accumulating dirt and grime, hindering disinfection.

[0090] The support arm 100 provided in this embodiment, during assembly, moves the mating structure 121 to the locking groove section 11h, and fixes the position of the anti-detachment ring 12 through the locking groove section 11h, exposing the slot 11c. The insertion part 201 is inserted into the connector 11 through the insertion cavity 11a, and then the locking pin 13 is inserted into the slot 11c. The insertion part 201 and the locking pin 13 partially engage to achieve the engagement of the insertion part 201 in the insertion cavity 11a. After engagement, the mating structure 121 moves along the groove section outside the locking groove section 11h, generating at least an axial displacement, which at least partially covers the slot 11c, thereby blocking the locking pin 13 and making it difficult for the locking pin 13 to come out. At the same time, the engagement between the locking pin 13 and the slot 11c can also be hidden by the anti-detachment ring 12. In addition, the entire assembly process does not require the use of screws or other fasteners, the assembly method is simple, there is no phenomenon of missing fasteners, the assembly stability is high, and the appearance is aesthetically pleasing. It can also reduce the inconvenience of disinfecting fasteners when wiping them down.

[0091] This application also provides a medical device. The medical device includes a connecting arm 200, a suspension device, and a support arm 100 in any embodiment of this application.

[0092] Medical equipment refers to various instruments, machines, and other equipment used for medical diagnosis, treatment, monitoring, or prevention of diseases, as well as for promoting health and rehabilitation.

[0093] Suspension devices are devices that need to be installed by suspension or attachment in order to provide optimal support and convenience during medical procedures.

[0094] Please see Figure 1 The connecting arm 200 is connected to a plug-in part 201. The outer periphery of the plug-in part 201 has a protruding ring 200a or a limiting ring groove. When the locking pin 13 abuts against the bottom of the protruding ring 200a or is inserted into the limiting ring groove, the suspension device is hooked to the locking pin 13 through the plug-in part 201, and the suspension device can rotate relative to the connector 11.

[0095] In other words, the suspension device is connected to the support arm 100 via the connecting arm 200. The locking pin 13 is connected to the connecting arm 200 by docking with the protruding ring 200a or the limiting ring groove of the insertion part 201, thereby enabling the suspension device to be attached. The locking groove 11c bears part of the weight of the suspension device and supports the suspension device as a whole via the support arm 100, increasing the installation stability of the suspension device and enabling the suspension device to rotate relatively stably.

[0096] In some embodiments, the suspended device includes a surgical light, a camera device, or a display device.

[0097] Surgical lights are used to provide bright, shadowless light to the surgical area. There are no restrictions on the type of surgical light; for example, it could be a shadowless lamp.

[0098] The video recording device includes a camera or other image capture device used to record the surgical procedure or to assist in minimally invasive surgery.

[0099] Display devices refer to screens used to display a patient's vital signs, surgical videos, or other relevant information.

[0100] For example, the suspended device is a surgical light, which may include a lamp holder and multiple light sources disposed on the lamp holder, the light sources being used to project illumination light onto the surgical area. The lamp holder is connected to a connecting arm 200.

[0101] The surgical light is connected to the support arm 100 via the connecting arm 200. The locking pin 13 connects the support arm 100 and the connecting arm 200, so that the surgical light can be connected to the support arm 100 and rotate around the axis of the plug part 201.

[0102] In some embodiments, the surface of the anti-detachment ring 12 has axial rays that intersect with the first groove segment 11e and the second groove segment 11g, and the axial rays extend from the direction of the suspension device toward the direction of the first groove segment 11e and the second groove segment 11g, and the angle between the first groove segment 11e and the axial rays is smaller than the angle between the adjacent second groove segment 11g and the axial rays.

[0103] It should be noted that the axial ray here is a virtual line with only one endpoint and one direction. The axial ray extends axially towards the first groove segment 11e and the second groove segment 11g, with the anti-detachment ring 12 at one end in the direction of the suspension device as the endpoint.

[0104] The axial ray can be used to characterize the extension direction of the anti-detachment ring 12, that is, the anti-detachment ring 12 extends from the direction of the suspension device to the direction of the first groove segment 11e and the second groove segment 11g.

[0105] The axial ray intersects with the first groove segment 11e and the second groove segment 11g. The intersection here includes cases where the included angle is greater than 0° and cases where they coincide.

[0106] The angle between the first groove segment 11e and the axial ray is smaller than the angle between the adjacent second groove segment 11g and the axial ray. That is, the degree of offset of the first groove segment 11e relative to the axial ray is smaller than the degree of offset of the second groove segment 11g relative to the axial ray. When the anti-detachment ring 12 moves along the first groove segment 11e, it can generate sufficient axial displacement.

[0107] The angle between the first groove segment 11e and the axial ray can be 0° or an acute angle. The angle between the adjacent second groove segment 11g and the axial ray can be an acute angle or a right angle. This increases the smoothness of movement of the anti-detachment ring 12.

[0108] For example, the angle between the first groove segment 11e and the axial ray can be 0°, and the angle between the adjacent second groove segment 11g and the axial ray can be 90°. In some embodiments, the anti-detachment ring 12 has an initial position in which the anti-detachment ring 12 blocks the locking groove 11c and the sliding groove 11d.

[0109] It is understandable that the initial position refers to the position of the anti-slip ring 12 when it is not subjected to external force. During assembly or disassembly, the anti-slip ring 12 can move in the slide groove 11d from the initial position.

[0110] Understandably, during assembly, the anti-detachment ring 12 can move from its initial position in the slide groove 11d to the locking groove section 11h to facilitate the engagement of the locking pin 13 with the locking groove 11c, thereby facilitating the engagement of the locking pin 13 with the insertion part 201. After engagement, the anti-detachment ring 12 can leave the locking groove section 11h and move in the groove section outside the locking groove section 11h to block the locking pin 13 and the locking groove 11c, and return to its initial position.

[0111] In this embodiment, in the initial position, the anti-detachment ring 12 covers the slot 11c and the slide groove 11d. That is, the slot 11c and the slide groove 11d are not visible from the circumferential outer surface of the anti-detachment ring 12. On the one hand, this makes it difficult for the locking pin 13 to come out. On the other hand, after the suspension device of the medical device is attached, the anti-detachment ring 12 in the initial position can hide the locking pin 13 and the slot 11c inside the anti-detachment ring 12, and also hide the slide groove 11d inside the anti-detachment ring 12, increasing the aesthetic appearance.

[0112] The method of exposing the card slot 11c by the anti-detachment ring 12 is not limited.

[0113] In some embodiments, please refer to Figures 1 to 3 When the mating structure 121 is located in the locking groove section 11h, the anti-detachment ring 12 extends beyond the slot 11c in the axial direction and away from the suspension device, so as to expose the slot 11c.

[0114] In other words, when the mating structure 121 is located in the locking groove section 11h, the anti-detachment ring 12 is positioned higher than the slot 11c in the axial direction away from the suspension device, so that the slot 11c can be disengaged from the blocking range of the anti-detachment ring 12, and the locking pin 13 can be inserted into or removed from the slot 11c from any direction without obstruction. After the operation is completed, the anti-detachment ring 12 can be returned to the initial position by reversing the operation to block the slot 11c again.

[0115] In this embodiment, the anti-detachment ring 12 can move a sufficient distance along the slide groove 11d to expose the slot 11c from the end face. The user can visually see whether the slot 11c is obscured or exposed, providing operational guidance and simplifying operation. Furthermore, in this embodiment, exposing the slot 11c through the movement and displacement of the anti-detachment ring 12 enhances the aesthetic appearance of the support arm 100. The anti-detachment ring 12 can be formed into a complete ring structure.

[0116] In other embodiments, the anti-detachment ring 12 also includes a clearance groove, in which the locking groove 11c is exposed when the mating structure 121 is located in a preset area of ​​the locking groove segment 11h.

[0117] In this embodiment, the setting of the clearance groove can reduce the axial displacement required for the anti-detachment ring 12 to expose the clearance groove when the locking pin 13 can be inserted or removed without obstruction, thereby reducing the axial extension range of the slide groove 11d, making the structure of the support arm 100 simple and increasing the operating efficiency.

[0118] In some embodiments, please refer to Figure 1 , Figure 2 and Figure 4 The matching structure 121 is set at one end of the anti-detachment ring 12 along the axial direction and close to the suspension device.

[0119] It is understandable that when the anti-detachment ring 12 and the suspension device are not connected to the connector 11, along the axial direction of the connector 11, the end of the anti-detachment ring 12 away from the suspension device is close to the connector 11, that is, close to the slide groove 11d. When the anti-detachment ring 12 is connected to the connector 11, the end without the mating structure 121 is connected to the connector 11 first. In this way, the axial displacement required for the anti-detachment ring 12 to move from the blocking groove 11c to the exposed groove 11c mating structure 121 can be reduced, and the required axial extension length of the slide groove 11d can be reduced.

[0120] In some embodiments, please refer to Figure 1 and Figure 7 The outer surface of the anti-detachment ring 12 forms part of the outer surface of the support arm 100.

[0121] In this embodiment, the anti-detachment ring 12 can be seen from the outer surface of the support arm 100. The anti-detachment ring 12 can serve as an appearance component of the support arm 100. The outer surface of the anti-detachment ring 12 has no other structure. After being assembled with the insertion part 201, the anti-detachment ring 12 can block the locking pin 13, making it difficult for the locking pin 13 to come out. At the same time, both the sliding groove 11d and the locking groove 11c can be blocked by the anti-detachment ring 12. There are few splicing and installation marks on the outer surface of the support arm 100, and the appearance reliability is high.

[0122] For example, the anti-detachment ring 12 can be a one-piece structure, that is, the anti-detachment ring 12 is manufactured in one piece, which is easy to manufacture and has no splicing installation marks on the appearance surface, making the support arm 100 aesthetically pleasing.

[0123] In some embodiments, please refer to Figures 5 to 7 The bottom end of the connector 11 has a shaft end face, and the groove 11d penetrates the shaft end face to form a notch 11i on the shaft end face. During the installation or disassembly of the support arm 100, the mating structure 121 can be inserted into the groove 11d or taken out of the groove 11d through the notch 11i.

[0124] Here, the bottom end of connector 11 is the end of connector 11 that is axially close to the suspension device during the docking process. It can be understood that the slot 11c is provided on the side wall of connector 11, and the position of slot 11c is at least higher than the position of the axial end face of the bottom end of connector 11.

[0125] Here, the notch 11i is either the inlet for the mating structure 121 to enter the slide 11d, or the outlet for the mating structure 121 to exit the slide 11d.

[0126] The mating structure 121 is inserted into the slide groove 11d through the notch 11i. The slide groove 11d penetrates the shaft end face. That is, once the mating structure 121 enters the slide groove 11d, it can generate at least an axial displacement and move to the top side, thereby changing the relative position between the mating structure 121 and the slot 11c, so that the slot 11c is exposed when it moves to the locking groove section 11h. After the locking pin 13 and the slot 11c are engaged, the mating structure 121 leaves the locking groove section 11h, thereby maintaining the position that covers the locking pin 13 and the slot 11c.

[0127] In this embodiment, the notch 11i is designed to allow direct viewing from the bottom of the interface, increasing the ease of inserting the mating structure 121 and facilitating its easy insertion and removal, thus reducing installation time. The bottom position also allows the mating structure 121 to be positioned within the notch 11i, thus blocking the sliding groove 11d and the locking slot 11c. Furthermore, after the mounting part is installed, it can also block the anti-detachment ring 12, preventing it from coming off.

[0128] In some embodiments, please refer to Figures 1 to 3 The slot 11c and the slide 11d are not connected.

[0129] Here, the fact that the slot 11c and the slide 11d are not connected means that the slot 11c and the slide 11d are not connected. The slot 11c and the slide 11d are isolated from each other. The mating structure 121 moves within the slide 11d, meaning it will not be inserted into the slot 11c, and the locking pin 13 will not be inserted into the slide 11d. This is to increase the reliability of the movement of the mating structure 121 and reduce the probability of movement jamming.

[0130] In some embodiments, please refer to Figures 1 to 3 The slots 11c and the slides 11d are arranged at intervals in the circumferential direction of the joint 11.

[0131] It should be noted that the slot 11c and the slide 11d are arranged at intervals in the circumferential direction of the connector 11. In the axial direction of the connector 11, the slide 11d and the slot 11c share a portion of the axial dimension, that is, part of the structure of the slide 11d is flush with the slot 11c along the axial direction.

[0132] In this embodiment, the mating structure 121 can move to at least a position flush with the slot 11c, thereby facilitating the exposure of the slot 11c and the setting of the locking shaft section through this position. This increases the reliability of the extension length of the slide groove 11d and reduces redundancy. Of course, while reducing the probability of interference between the mating structure 121 and the locking pin 13, it also facilitates the anti-detachment ring 12 to cover the slide groove 11d and the slot 11c, increasing structural reliability.

[0133] In some embodiments, the angle between the extension direction of the first groove segment 11e and the axial direction of the connector 11 is 0°±10°. That is, the angle between the extension direction of the first groove segment 11e and the axial direction of the connector 11 can fluctuate within a range of 10° around the 0° baseline, i.e., the offset angle of the extension direction of the first groove segment 11e relative to the axial direction does not exceed 10°; for example, 0°, 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, etc.

[0134] In this embodiment, the extension direction of the first groove segment 11e is offset by a small angle relative to the axial direction of the connector 11. This makes it easier for the first groove segment 11e to have a larger length component in the axial direction and a smaller length component in the circumferential direction. This reduces the positional change of the anti-detachment ring 12 in the circumferential direction when the first groove segment 11e moves, reduces movement resistance, eliminates the need for large tilting movements, and increases smoothness of movement.

[0135] For example, please refer to Figure 2 and Figure 3 The angle between the extension direction of the first groove 11e and the axial direction of the joint 11 is 0°. In this way, the mating structure 121 can move axially within the first groove 11e, with high smoothness of movement and no circumferential displacement, resulting in high reliability of movement.

[0136] In some embodiments, the angle between the extension direction of the second groove segment 11g and the axial direction of the connector 11 is 90°±10°. That is, the angle between the extension direction of the first groove segment 11e and the axial direction of the connector 11 can fluctuate within a range of 10° around the 90° baseline, i.e., the offset angle of the extension direction of the first groove segment 11e relative to the perpendicular axial direction does not exceed 10°; exemplary, 0°, 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, etc.

[0137] In this embodiment, the extension direction of the second groove segment 11g has a smaller offset angle relative to the axial direction perpendicular to the connector 11. This allows the second groove segment 11g to have a larger length component in the circumferential direction and a smaller length component in the axial direction. This reduces the positional change of the anti-detachment ring 12 in the axial direction when the second groove segment 11g moves, thus smoothly changing the direction of movement from the first groove segment 11e to the second groove segment 11g, reducing movement resistance, eliminating the need for large tilting movements, and increasing the smoothness of movement.

[0138] For example, please refer to Figure 2 and Figure 3 The angle between the extension direction of the second groove 11g and the axial direction of the connector 11 is 90°. In this way, the mating structure 121 can move circumferentially within the second groove 11g, with high smoothness of movement and no axial displacement, resulting in high reliability of movement.

[0139] In some embodiments, the groove wall of the locking groove section 11h is provided with a notch, and the mating structure 121 can fall into the notch under the gravity of the anti-detachment ring 12.

[0140] In this embodiment, the notch is designed to limit the engagement structure 121 when it is positioned in the locking groove section 11h, so that the engagement structure 121 is locked in the locking groove section 11h and is not easy to move, thereby better exposing the slot 11c so as to facilitate the docking of the slot 11c and the pin 13.

[0141] In some embodiments, please refer to Figure 3 The support arm 100 also includes a reset structure, and at least one first groove segment 11e includes an initial groove segment 11f. When the mating structure 121 is in the extreme position near the end of the suspension device of the initial groove segment 11f, the anti-detachment ring 12 is in the initial position.

[0142] The reset structure provides a reset force to bring the anti-detachment ring 12 closer to the initial position, at least when the mating structure 121 is within the range of motion of the initial slot segment 11f and the anti-detachment ring 12 is deviated from the initial position.

[0143] It is understandable that the initial groove segment 11f is the initial movement groove segment of the mating structure 121 in the slide groove 11d. The mating structure 121 moves from the initial position through the initial groove segment 11f to the locking groove segment 11h to expose the slot 11c. Then, the locking groove segment 11h moves back to the initial position through the initial groove segment 11f to cover the slot 11c.

[0144] In this embodiment, the reset structure can apply a reset force to the anti-detachment ring 12 when the mating structure 121 is located in the starting groove segment 11f and deviates from the initial position, so that the anti-detachment ring 12 is reset to the initial position, thereby increasing the reliability of the blocking slot 11c and the locking pin 13. By increasing the reset reliability of the anti-detachment ring 12 through the reset structure, the assembly reliability of the support arm 100 and the plug-in part 201 is improved.

[0145] Here, the reset force provided by the reset structure can be a transient force provided at a certain position, under which the anti-detachment ring 12 can be reset to the initial position, or it can be a continuous force provided by the reset structure as long as the mating structure 121 is within the range of the starting groove segment 11f, regardless of the position of the mating structure 121 in the starting groove segment 11f.

[0146] In some embodiments, for example, the reset structure constantly provides a reset force to move the anti-detachment ring 12 closer to the initial position within the range of motion of the mating structure 121 in the initial slot segment 11f.

[0147] In other words, as long as the structure 121 is within the range of motion of the initial slot segment 11f, the reset structure can provide a reset force to move the anti-detachment ring 12 closer to the initial position, regardless of the position, so that the anti-detachment ring 12 can accurately return to the initial position and increase the reset reliability.

[0148] The specific construction of the reset structure is not limited.

[0149] In some embodiments, the reset structure includes a first magnetic element and a second magnetic element, the first magnetic element being disposed on the connector 11 and the second magnetic element being disposed on the anti-detachment ring 12.

[0150] The second magnetic component is located on the side of the first magnetic component that is close to the suspension device, and the first and second magnetic components repel each other.

[0151] In other words, the second magnetic component is closer to the suspension device than the first magnetic component. When the mating structure 121 moves from the initial position along the starting groove 11f towards the locking groove 11h, the second magnetic component moves away from the suspension device, and the distance between the second magnetic component and the first magnetic component shortens. Thus, under the repulsive force of the first and second magnetic components, a restoring force close to the initial position is applied to the anti-detachment ring 12. When the mating structure 121 moves from the locking groove 11h along the starting groove 11f towards the initial position, under the repulsive force of the first and second magnetic components, the anti-detachment ring 12 moves towards the initial position.

[0152] In other embodiments, the second magnetic element is disposed on the side of the first magnetic element away from the suspension device, and the first and second magnetic elements attract each other.

[0153] In other words, the second magnetic component is further away from the suspension device than the first magnetic component. When the mating structure 121 moves from the initial position along the starting groove 11f towards the locking groove 11h, the second magnetic component moves away from the suspension device, increasing the distance between the second magnetic component and the first magnetic component. As a result, under the attraction of the first and second magnetic components, a restoring force close to the initial position is applied to the anti-detachment ring 12. When the mating structure 121 moves from the locking groove 11h along the starting groove 11f towards the initial position, under the attraction of the first and second magnetic components, the anti-detachment ring 12 moves towards the initial position.

[0154] The magnetic force between the first and second magnetic components provides a reset force for the anti-detachment ring 12, resulting in a simple and reliable structure.

[0155] In other embodiments, please refer to Figures 1 to 7The reset structure includes an elastic element 14, the two ends of which are respectively engaged with the anti-detachment ring 12 and the connector 11. The elastic element 14 is in an energy storage state at least when the engaging structure 121 is within the movement stroke range of the initial groove segment 11f and the anti-detachment ring 12 is deviated from the initial position.

[0156] In other words, one end of the elastic element 14 can be fixed by the connector 11 to increase installation stability, and the other end cooperates with the anti-detachment ring 12. When the mating structure 121 is within the movement range of the initial groove segment 11f and the anti-detachment ring 12 is deviated from the initial position, the elastic element 14 can undergo elastic deformation to store energy and apply a reset force toward the initial position to the mating structure 121. When reset is required, it is reset to the initial position by the reset force.

[0157] The elastic element 14 has a simple and reliable structure, which makes it easy to keep the anti-detachment ring 12 in the initial position and achieve automatic reset when the mating structure 121 is within the movement stroke range of the starting groove segment 11f.

[0158] The specific construction of the elastic element 14 is not limited; for example, the elastic element 14 can be a spring.

[0159] It is understood that the elastic element 14 can apply a restoring force to the mating structure 121 at a certain position in the initial groove segment 11f and deviating from the initial position. That is, the elastic element 14 may not always be in contact with the anti-detachment ring 12 within the initial groove segment 11f; or it may always provide elastic restoring force within the range of the initial groove segment 11f, without any limitation.

[0160] In some embodiments, please refer to Figure 6 The elastic element 14 is in an energy storage state within the range of motion of the mating structure 121 in the initial groove section 11f.

[0161] In other words, as long as the mating structure 121 is within the range of motion of the initial groove segment 11f, the elastic element 14 will always provide elastic restoring force to the mating structure 121, regardless of the position of the mating structure 121. That is, the elastic element 14 can always be in contact with the mating structure 121 within the initial groove segment 11f to continuously provide elastic restoring force and increase the reliability of the anti-detachment ring 12 returning to the initial position.

[0162] The location of the elastic element 14 is not limited.

[0163] In some embodiments, please refer to Figure 5 The connector 11 includes a housing 111 and an inner tube 112. The housing 111 is fitted around the outer periphery of the inner tube 112. The slot 11c penetrates the side wall of the housing 111 and the side wall of the inner tube 112. The sliding groove 11d is provided on the side wall of the housing 111. The elastic element 14 is located in the space between the outer peripheral surface of the inner tube 112 and the inner surface of the anti-detachment ring 12.

[0164] The outer shell 111 serves as the exterior part of the support arm 100, concealing the structure of the inner tube 112; for example, the outer shell 111 can be made of plastic, which facilitates molding into the required process shape.

[0165] The inner tube 112 serves as a structural load-bearing component, increasing the overall structural strength of the support arm 100.

[0166] For example, the inner tube 112, the plug-in part 201 and the locking pin 13 can all be made of metal. The plug-in part 201 is inserted into the inner tube 112. The inner tube 112, the locking pin 13 and the plug-in part 201 all serve as structural load-bearing components. The metal material can improve the structural strength and reliability.

[0167] The slide groove 11d is provided on the side wall of the housing 111 so that the slide groove 11d can be seen from the outer surface when it is docked with the anti-detachment ring 12, thereby facilitating the docking of the mating structure 121 with the slide groove 11d.

[0168] It should be noted that the elastic element 14 is located in the space between the outer peripheral surface of the inner tube 112 and the inner surface of the anti-detachment ring 12. The elastic element 14 can be completely in the slide groove 11d, or it can be between the inner surface of the outer shell 111 and the outer peripheral surface of the inner tube 112; or a part of the elastic element 14 can be in the slide groove 11d and the other part can be between the outer peripheral surface of the outer shell 111 and the inner peripheral surface of the anti-detachment ring 12. There are no restrictions here.

[0169] In this embodiment, the elastic element 14 is designed to facilitate contact with the mating structure 121, thereby storing energy and providing a restoring force for the mating structure 121.

[0170] In some embodiments, please refer to Figure 1 and Figure 7 When the mating structure 121 is located in the locking groove section 11h, the elastic element 14 separates from the anti-detachment ring 12.

[0171] In other words, when the mating structure 121 is located in the locking groove section 11h, the elastic element 14 does not exert an elastic force on the anti-detachment ring 12, and the anti-detachment ring 12 and the elastic element 14 do not affect each other. At this time, the elastic element 14 can be in an energy storage state under other structures, or it can recover its deformation and be in a natural state. No restrictions are imposed here.

[0172] In this embodiment, when the mating structure 121 is located in the locking groove section 11h, the anti-detachment ring 12 is not subjected to the force of the elastic member 14, that is, it will not move to the initial position under the action of the elastic member 14, and can be reliably locked in the locking groove section 11h to stably expose the card slot 11c, which facilitates the insertion of the card pin 13.

[0173] In some embodiments, please refer to Figure 6 and Figure 7Within the stroke range of the mating structure 121 in the initial groove segment 11f, one end of the elastic member 14 is separably held against the mating structure 121. When the mating structure 121 slides from the initial groove segment 11f to the adjacent second groove segment 11g, one end of the elastic member 14 separates from the mating structure 121.

[0174] In other words, within the stroke range of the mating structure 121 in the initial slot 11f, the mating structure 121 undergoes axial displacement along the initial slot 11f, causing the elastic element 14 to undergo elastic deformation and store energy. When the mating structure 121 moves to the adjacent second slot 11g, the mating structure 121 and the elastic element 14 disengage, so that the mating structure 121 and the elastic element 14 do not affect each other. When the elastic element 14 moves in the second slot 11g (there are multiple second slots 11g) or is locked in the second slot 11g (there is only one second slot 11g), no elastic force is applied to the mating structure 121, thus increasing the reliability of movement or locking.

[0175] It is understandable that when one end of the elastic element 14 is separated from the mating structure 121, the elastic element 14 can always be in an energy-storing state so as to facilitate the reset of the mating structure 121 when it slides back to the starting groove segment 11f. Of course, it can also be in an energy-storing state only when the mating structure 121 is in the starting groove segment 11f, and there is no limitation here.

[0176] In some embodiments, please refer to Figures 1 to 7 The support arm 100 includes a switching element 15, which is disposed on the connector 11 and can move between a first state and a second state.

[0177] Please see Figure 6 Within the stroke range of the starting groove segment 11f of the mating structure 121, the switching member 15 is in the first state and separated from the elastic member 14.

[0178] Please see Figure 7 When the mating structure 121 slides from the initial groove segment 11f to the adjacent second groove segment 11g, one end of the elastic member 14 separates from the mating structure 121, and the mating structure 121 drives the switching member 15 to switch from the first state to the second state. One end of the elastic member 14 switches from the state of abutting against the mating structure 121 to the state of abutting against the switching member 15.

[0179] In this embodiment, in the first state, the switching member 15 and the elastic member 14 do not affect each other. At this time, the mating structure 121 and the elastic member 14 abut against each other, and the elastic member 14 stores energy. Thus, the switching member 15 can also not affect the mating structure 121, increasing the reliability of the movement. As the mating structure 121 slides from the initial slot segment 11f to the beginning of entering the adjacent second slot segment 11g, the mating structure 121 gradually disengages from the elastic member 14. Under the action of the mating structure 121, the switching member 15 begins to switch and gradually moves radially from the inside of the mating structure 121 to abut against the elastic member 14. In the second state, the elastic member 14 separates from the mating structure 121, and the elastic member 15... 4. The mating structure 121 does not affect the switching member 15. The mating structure 121 drives the switching member 15 to switch from the state of being separated from the elastic member 14 to the state of being abutting against the elastic member 14, so that the elastic member 14 remains in an energy storage state. When the assembly is finished, the mating structure 121 slides back to the starting groove segment 11f. When gradually entering the starting groove segment 11f, the mating structure 121 begins to gradually push the switching member 15 to switch and move radially from the inside of the mating structure 121 to separate from the elastic member 14. At the same time, the mating structure 121 gradually abuts against the elastic member 14, so that the mating structure 121 can quickly return to the initial position under the restoring force of the elastic member 14 without additional operation, which is convenient and reliable.

[0180] In some embodiments, please refer to Figures 1 to 7 The support arm 100 includes a mounting base 16 disposed on the outer peripheral surface of the inner tube 112. The switching member 15 is rotatably connected to the mounting base 16, and the two define a rotation axis. The side wall of the inner tube 112 is provided with a receiving groove 112a (see Figure 3 , Figure 6 The switching component 15 includes a first part 151 and a second part 152 located on opposite sides of the rotation axis.

[0181] Please see Figure 3 and Figure 6 When the switching member 15 is in the first state, the first part 151 extends into the receiving groove 112a, and the second part 152 extends into the second groove 11g adjacent to the starting groove 11f.

[0182] Please see Figure 7 When the switching member 15 is in the second state, the first part 151 extends out of the receiving groove 112a and into the starting groove segment 11f, and the second part 152 extends out of the second groove segment 11g into the receiving groove 112a.

[0183] That is, the switching element 15 can rotate about the rotation axis relative to the mounting base 16 to switch from the first state to the second state.

[0184] In this embodiment, in the first state, neither the first part 151 nor the second part 152 is located within the starting groove 11f, so as to separate from the elastic member 14 and not interfere with the mating structure 121. In the second state, the first part 151 extends into the starting groove 11f to abut against the elastic member 14, so that the elastic member 14 remains in an energy storage state. The second part 152 extends from the second groove 11g into the receiving groove 112a, so as not to obstruct the movement of the mating structure 121 within the second groove 11g, thereby increasing the smoothness of the movement of the mating structure 121 and ensuring high structural reliability of the support arm 100.

[0185] The specific construction of the switching element 15 is not limited. For example, the switching element 15 can be a rocker switch.

[0186] In some embodiments, the switching member 15 is a ferromagnetic component, and the support arm 100 further includes a first magnetic attractor and a second magnetic attractor. The first magnetic attractor and the second magnetic attractor are disposed at both ends of the inner tube 112 in the extending direction of the receiving groove 112a. The first magnetic attractor provides a magnetic attraction force to the first part 151, causing the first part 151 to move closer to the first magnetic attractor, at least when the switching member 15 is in the first state. The second magnetic attractor provides a magnetic attraction force to the second part 152, causing the second part 152 to move closer to the second magnetic attractor, at least when the switching member 15 is in the second state.

[0187] That is, the switching element 15 is a ferromagnetic component that can be magnetized under a very small magnetic field.

[0188] Here, in the first state, the first part 151 extends into the receiving groove 112a, and the first magnetic attractor can generate a magnetic attraction force on the first part 151, fixing the position of the first part 151 in the receiving groove 112a. This fixes the overall position of the switching member 15, preventing accidental movement that could interfere with the movement of the mating structure 121 in the initial groove segment 11f or cause contact with the elastic member 14. When it is necessary to switch the switching member 15 to the second state, an external force overcomes the magnetic attraction force of the first part 151 and the first magnetic attractor, allowing the switching member 15 to switch to the second state. 5. Rotate around the rotation axis so that the first part 151 abuts against the elastic member 14, and the second part 152 extends into the receiving groove 112a. At this time, the second part 152 can be independent of the mating structure 121. The mating structure 121 moves or locks in the second groove segment 11g. The second part 152 is kept in a fixed position under the action of the second magnetic attraction member, thereby fixing the overall position of the switching member 15 and keeping the first part 151 abutting against the elastic member 14. It will not loosen under the action of the elastic member 14, thus increasing the reliability of the position.

[0189] In this embodiment, by setting the first magnetic attractor and the second magnetic attractor, the switching member 15 is fixed in position in the first state and the second state, and will not loosen unexpectedly, thereby increasing the structural reliability and reducing the impact on the movement of the mating structure 121.

[0190] In some embodiments, please refer to Figure 2 and Figure 3 The number of first groove segments 11e is at least two, the number of second groove segments 11g is at least two, and the first groove segments 11e and the second groove segments 11g are arranged alternately in the extension direction of the slide 11d. The locking groove segment 11h is located at the end of the slide 11d in the extension direction away from the suspension device.

[0191] In other words, any slot adjacent to the first slot segment 11e is the second slot segment 11g, and any slot adjacent to the second slot segment 11g is the first slot segment 11e. In this way, the reliability of movement is increased, while the extension length of the starting slot segment 11f is reduced, the arrangement length of the elastic element 14 is reduced, and the deformation of the elastic element 14 is reduced.

[0192] In this embodiment, there are multiple first groove segments 11e and second groove segments 11g, and the first groove segments 11e and second groove segments 11g are arranged alternately, which helps to increase the reliability of movement and reduce the probability of accidental loosening. The locking groove segment 11h is located at the end of the slide groove 11d in the direction away from the suspension device. That is, the locking groove segment 11h is the movement endpoint of the mating structure 121. After the insertion part 201 is assembled, it can be directly reversed to return to the initial position, which increases the reliability of movement.

[0193] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.

[0194] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A support arm characterized by, include: The arm body has a connector, the inside of which has a plug-in cavity for inserting the plug part of the suspension device. The side wall of the connector is provided with a slot and a sliding groove. A locking pin is inserted into the slot and is used to cooperate with the plug-in part, so that the plug-in part is hooked onto the locking pin and the plug-in part can rotate relative to the connector; An anti-detachment ring is movably fitted onto the outer periphery of the connector. The anti-detachment ring is provided with a mating structure that extends into the slide groove and is movable within the slide groove. The slide groove includes at least one first groove segment and at least one second groove segment arranged at an angle. The first groove segment has at least an axial length component in the connector, and the second groove segment has at least a circumferential length component in the connector. One of the at least one second groove segment is a locking groove segment. When the mating structure moves within a groove outside the locking groove, the anti-disengagement ring blocks at least a portion of the slot to prevent the locking pin from disengaging. When the mating structure is located in the locking groove section, the slot is exposed, allowing the locking pin to be inserted into or removed from the slot.

2. The support arm of claim 1, wherein, The anti-detachment ring has an initial position in which it blocks the slot and the slide groove.

3. The support arm of claim 1, wherein, When the mating structure is located in the locking groove section, the anti-detachment ring extends beyond the slot along the axial direction and away from the suspension device to expose the slot; Alternatively, the anti-detachment ring may further include a clearance groove, in which the slot protrudes from the clearance groove when the mating structure is located in a preset area of ​​the locking groove segment.

4. The support arm according to claim 1, characterized in that, The mating structure is located at one end of the anti-detachment ring along the axial direction and close to the suspension device.

5. The support arm according to claim 1, characterized in that, The outer circumferential surface of the anti-detachment ring forms part of the external appearance of the support arm.

6. The support arm according to claim 1, characterized in that, The bottom end of the connector has a shaft end face, and the groove passes through the shaft end face to form a notch on the shaft end face. During the installation or disassembly of the support arm, the mating structure can be inserted into the groove or removed from the groove through the notch.

7. The support arm according to claim 1, characterized in that, The slots and the slides are not interconnected, and / or the slots and the slides are arranged at intervals in the circumferential direction of the joint.

8. The support arm according to claim 1, characterized in that, The surface of the anti-detachment ring has axial rays that intersect with the first groove segment and the second groove segment, and the axial rays extend from the direction of the suspension device toward the direction of the first groove segment and the second groove segment. The angle between the first groove segment and the axial rays is smaller than the angle between the adjacent second groove segment and the axial rays.

9. The support arm according to claim 1, characterized in that, The angle between the extension direction of the first groove segment and the axial direction of the joint is 0±10°.

10. The support arm according to claim 1, characterized in that, The angle between the extension direction of the second groove and the axial direction of the joint is 90±10°; and / or, the groove wall of the locking groove is provided with a notch, and the mating structure can fall into the notch under the gravity of the anti-detachment ring.

11. The support arm according to any one of claims 1-10, characterized in that, The support arm further includes a reset structure, and the at least one first groove segment includes an initial groove segment. When the mating structure is located at its extreme position near one end of the initial groove segment close to the suspension device, the anti-detachment ring is in its initial position. The reset structure provides a reset force that brings the anti-detachment ring closer to the initial position, at least within the range of motion of the mating structure in the initial groove section and when the anti-detachment ring is deviated from the initial position.

12. The support arm according to claim 11, characterized in that, The reset structure, within the range of motion of the mating structure in the initial groove section, constantly provides a reset force to move the anti-detachment ring closer to the initial position.

13. The support arm according to claim 11, characterized in that, The reset structure includes a first magnetic component and a second magnetic component, wherein the first magnetic component is disposed on the connector and the second magnetic component is disposed on the anti-detachment ring; The second magnetic element is located on the side of the first magnetic element closer to the suspension device, and the first magnetic element and the second magnetic element repel each other; or, the second magnetic element is located on the side of the first magnetic element away from the suspension device, and the first magnetic element and the second magnetic element attract each other.

14. The support arm according to claim 11, characterized in that, The reset structure includes an elastic element, the two ends of which are respectively engaged with the anti-detachment ring and the connector, and the elastic element is in an energy storage state at least within the movement stroke range of the engaging structure in the initial groove section and when the anti-detachment ring is deviated from the initial position.

15. The support arm according to claim 14, characterized in that, The elastic element is in an energy storage state within the range of motion of the mating structure in the initial groove section.

16. The support arm according to claim 14, characterized in that, The connector includes an outer shell and an inner tube. The outer shell is fitted around the outer periphery of the inner tube. The slot penetrates the side wall of the outer shell and the side wall of the inner tube. The sliding groove is disposed on the side wall of the outer shell. The elastic element is located in the space between the outer peripheral surface of the inner tube and the inner surface of the anti-detachment ring.

17. The support arm according to claim 14, characterized in that, When the mating structure is located in the locking groove section, the elastic element separates from the anti-detachment ring.

18. The support arm according to claim 14, characterized in that, Within the stroke range of the initial groove segment, one end of the elastic member is detachably held against the mating structure. When the mating structure slides from the initial groove segment to the adjacent second groove segment, one end of the elastic member separates from the mating structure.

19. The support arm according to claim 14, characterized in that, The support arm includes a switching element, which is disposed at the joint and is movable between a first state and a second state. Within the stroke range of the initial groove section, the switching element is in the first state and separated from the elastic element; When the mating structure slides from the initial groove segment to the adjacent second groove segment, one end of the elastic member separates from the mating structure, and the mating structure drives the switching member to switch from the first state to the second state. One end of the elastic member switches from a state of abutting against the mating structure to a state of abutting against the switching member.

20. The support arm according to claim 19, characterized in that, The connector includes an outer shell and an inner tube. The outer shell is fitted around the outer periphery of the inner tube. The slot passes through the side wall of the outer shell and the side wall of the inner tube. The sliding groove is provided on the side wall of the outer shell. The support arm includes a mounting base disposed on the outer circumferential surface of the inner tube, the switching member is rotatably connected to the mounting base, and the two define a rotation axis, the side wall of the inner tube is provided with a receiving groove, and the switching member includes a first part and a second part located on opposite sides of the rotation axis. When the switching element is in the first state, the first part extends into the receiving groove, and the second part extends into the second groove segment adjacent to the starting groove segment; When the switching element is in the second state, the first part extends out of the receiving groove and into the starting groove section, and the second part extends out of the second groove section into the receiving groove.

21. The support arm according to claim 20, characterized in that, The switching element is a ferromagnetic element, and the support arm further includes a first magnetic attractor and a second magnetic attractor. The first magnetic attractor and the second magnetic attractor are disposed at opposite ends of the inner tube in the extension direction of the receiving groove. The first magnetic attractor provides a magnetic attraction force to the first part, bringing the first part closer to the first magnetic attractor, at least when the switching element is in a first state. The second magnetic attractor provides a magnetic attraction force to the second part, bringing the second part closer to the second magnetic attractor, at least when the switching element is in a second state.

22. The support arm according to claim 1, characterized in that, The number of the first groove segment is at least two, the number of the second groove segment is at least two, the first groove segment and the second groove segment are arranged alternately in the extension direction of the slide, and the locking groove segment is located at the end of the slide in the extension direction away from the suspension device.

23. A medical device, characterized in that, include: Connecting arm; A suspension device is connected to the connecting arm; And the support arm according to any one of claims 1-22, wherein the connecting arm is connected to a plug-in portion, the outer periphery of the plug-in portion has a convex ring or a limiting ring groove, and when the locking pin abuts against the bottom of the convex ring or is inserted into the limiting ring groove, the suspension device is hooked to the locking pin through the plug-in portion, and the suspension device can rotate relative to the connector.

24. The medical device according to claim 23, characterized in that, The suspended device includes a surgical light, a camera device, or a display device.

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