Rotation limiting device and medical equipment

Abstract

The utility model provides a rotation limiting device and medical equipment. The rotation limiting device comprises a rotation assembly (1), a first limiting assembly (2) and a second limiting assembly (3). The rotating assembly (1) comprises a rotating piece (12) and a triggering piece (11), the triggering piece (11) is arranged on the rotating piece (12), and the triggering piece (11) and the rotating piece (12) rotate synchronously; the first limiting assembly (2) and the second limiting assembly (3) are arranged on the rotation track of the triggering piece (11) in a spaced mode. The initial position of the trigger piece (11) is arranged between the first limiting assembly (2) and the second limiting assembly (3); the first limiting assembly (2) and the second limiting assembly (3) are both used for allowing or preventing the triggering piece (11) from passing through the set positions of the first limiting assembly (2) and the second limiting assembly (3). The rotation limiting device can achieve limiting in the clockwise direction and the anticlockwise direction at any rotation angle of the rotation assembly, the situation that the cable is pulled broken due to the fact that the rotation angle of the rotation assembly is too large can be avoided, and normal operation of medical equipment is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a rotation limiting device and medical equipment. Background Art

[0002] In the field of medical device technology, the rotation range of the rotating component of medical equipment is greater than 360 degrees and less than 720 degrees. During the rotation process of the rotating component, in order to prevent the rotating component from overshooting, a mechanical limiter is required to prevent the cable between the rotating component and the fixed component from being pulled apart.

[0003] Since the rotation range of the rotating component exceeds 360°, the rotation path of the rotating component is repeated during its rotation process. Therefore, the traditional structure of directly setting a limit block at the end of its stroke is not suitable for limiting the position of the rotating component.

[0004] Therefore, for those skilled in the art, how to design a limiting device that can limit and protect the rotating component when the rotation stroke of the rotating component exceeds 360° and is less than 720° is a technical problem that urgently needs to be solved. Utility Model Content

[0005] The purpose of the present utility model is to provide a rotation limit device and medical equipment. The rotation limit device can realize the limitation in both clockwise and counterclockwise directions at any rotation angle of the rotating component. The limitation has high accuracy and strong practicality. It can avoid the cable being broken due to excessive rotation angle of the rotating component, thereby ensuring the normal operation of the medical equipment.

[0006] To achieve the above-mentioned purpose, the utility model provides a rotation limit device, including a rotation component, a first limit component and a second limit component, the rotation component includes a rotating part and a trigger component, the trigger component is provided on the rotating part, and the trigger component rotates synchronously with the rotating part; the first limit component and the second limit component are arranged at intervals on the rotation trajectory of the trigger component; the initial position of the trigger component is set between the first limit component and the second limit component; the first limit component and the second limit component are both used to allow or prevent the trigger component from passing through its own set position.

[0007] Optionally, the first limiting assembly includes: a telescopic member and a fixed seat, the telescopic member is slidably arranged on the fixed seat; the telescopic member can be extended or retracted from the fixed seat.

[0008] Optionally, when the telescopic part of the second position-limiting assembly is extended, the telescopic part of the first position-limiting assembly is retracted; when the telescopic part of the second position-limiting assembly is retracted, the telescopic part of the first position-limiting assembly is extended.

[0009] Optionally, the first limiting assembly and the second limiting assembly are symmetrically arranged about the rotation center of the rotating member.

[0010] Optionally, the fixed seat is fixed on the side of the telescopic member away from the rotating member, and the telescopic member is capable of sliding in the radial direction of the rotating member.

[0011] Optionally, the telescopic member is provided with a through inclined slot, the inclined slot has a first end and a second end, the first end is away from the fixed seat, and the second end is close to the fixed seat; the trigger member is used for entering the inclined slot from the first end or the second end and sliding in the inclined slot.

[0012] Optionally, the trigger member comprises a fixedly connected connecting portion and a positioning pin, the positioning pin is arranged on the side of the connecting portion close to the telescopic member; the positioning pin is used for entering the inclined slot from the first end when the telescopic member is retracted, and is used for entering the inclined slot from the second end when the telescopic member is extended.

[0013] Optionally, the trigger member further comprises a limiting portion, the limiting portion is fixed on the connecting portion and arranged on the same side as the positioning pin; the limiting portion is used for avoiding the telescopic member when the telescopic member is retracted, and is used for abutting against the telescopic member when the telescopic member is extended.

[0014] Optionally, the telescopic member is provided with a touch switch and an elastic member; the elastic member is used for limiting in contact with the trigger member, and the touch switch is used for being triggered by the trigger member before the trigger member contacts the telescopic member; after the touch switch is triggered, a stop signal can be sent to a driving device.

[0015] To achieve the above-mentioned purpose, the utility model provides a kind of medical equipment, including rotating component, fixed rack and any one described rotating limiting device, the rotating component is rotatably arranged on the fixed rack, and the rotating assembly is arranged on the rotating component;The first limiting assembly and the second limiting assembly are arranged in the fixed rack.

[0016] In the present application, a rotating limiting device and medical equipment are provided.The rotating limiting device can limit the rotation of the rotating assembly in both clockwise and counterclockwise directions through the first limiting assembly and the second limiting assembly, without limiting the initial angle of the rotating assembly.It can be used to limit the rotation of the rotating assembly at any angle, with high accuracy and strong practicality.It can prevent the rotating angle of the rotating assembly from exceeding the threshold and breaking the cable, ensuring the normal operation of the medical equipment. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the principle of the rotating limiting device in a preferred embodiment of the utility model.

[0018] Figure 2 This is a perspective structural diagram of a first limiting component in a rotation limiting device in a preferred embodiment of the present utility model;

[0019] Figure 3 This is a front view structural diagram of the second limiting component in the rotation limiting device in a preferred embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of the second limiting component in the rotation limiting device in a preferred embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of a trigger member in a rotation limiting device in a preferred embodiment of the present utility model;

[0022] Figure 6 This is a structural diagram of a trigger member in a rotation limiting device in a preferred embodiment of the present invention in an initial position, wherein the first limiting component is in a retracted state and the second limiting component is in an extended state;

[0023] Figure 7 Schematic diagram of the structure of the trigger member in the rotation limit device in a preferred embodiment of the present invention rotates along the second direction to the first stop position, wherein the first limit assembly is in a retracted state and the second limit assembly is in an extended state;

[0024] Figure 8 Schematic diagram of the structure of the trigger member in the rotation limiting device in a preferred embodiment of the present invention passing through the first limiting assembly along the second direction, wherein the first limiting assembly is in an extended state and the second limiting assembly is in an extended state;

[0025] Figure 9 Schematic diagram of the structure of the trigger member in the rotation limiting device in a preferred embodiment of the present invention passing through the second limiting assembly along the second direction, wherein the first limiting assembly is in an extended state and the second limiting assembly is in a retracted state;

[0026] Figure 10 This is a structural diagram of a preferred embodiment of the present invention in which the trigger member of the rotation limit device rotates along the second direction to the first stop position, wherein the first limit component is in an extended state and the second limit component is in a retracted state;

[0027] Figure 11 Schematic diagram of the structure of the trigger member in the rotation limiting device in a preferred embodiment of the present invention passing through the second limiting assembly along the first direction, wherein the first limiting assembly is in an extended state and the second limiting assembly is in an extended state;

[0028] Figure 12This is a structural schematic diagram of a trigger member in a rotation limiting device in a preferred embodiment of the present invention passing through a first limiting component along a first direction, wherein the first limiting component is in a contracted state and the second limiting component is in an extended state.

[0029] In the picture:

[0030] Rotating assembly 1; trigger member 11; connecting portion 111; positioning pin 112; limiting portion 113; protrusion 114; rotating member 12;

[0031] First limiting assembly 2; second limiting assembly 3; first stop position 10; second stop position 20;

[0032] Telescopic member 4; first telescopic member 41; second telescopic member 42; inclined slot 43; first end 431; second end 432;

[0033] Fixed seat 5; first fixed seat 51; second fixed seat 52;

[0034] Touch switch 6; elastic member 7; locking groove 8. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0036] The terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred mechanism or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0037] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or connection through an intermediate medium; internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0038] Herein, the term "axial direction" refers to the direction of the central axis of the rotating member; the term "radial direction" refers to the direction perpendicular to the central axis of the rotating member; and the term "circumferential direction" refers to the direction around the central axis of the rotating member.

[0039] The present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. In the absence of conflict, the following embodiments and features therein may complement or be combined with each other.

[0040] Reference Figure 1 As shown, a preferred embodiment of the present invention provides a rotation limiting device, comprising a rotating assembly 1, a first limiting assembly 2, and a second limiting assembly 3. The rotating assembly 1 comprises a trigger 11 and a rotating member 12, wherein the trigger 11 is disposed on the rotating member 12, and the trigger 11 rotates synchronously with the rotating member 12. The first limiting assembly 2 and the second limiting assembly 3 are spaced apart on the rotation trajectory of the trigger 11. The initial position of the trigger 11 is set between the first limiting assembly 2 and the second limiting assembly 3. The first limiting assembly 2 and the second limiting assembly 3 are both used to allow or prevent the trigger 11 from passing through its set position.

[0041] It should be noted that the initial position of the trigger member 11 can be set at any position between the first limit assembly 2 and the second limit assembly 3, thereby enabling flexible adjustment of the rotation angle range of the rotating assembly 1. In actual design, the initial position of the trigger member 11 can be set according to the actual rotation angle required by the trigger member 11.

[0042] A preferred embodiment of the present invention further provides a medical device comprising a rotating member, a fixed frame, and the aforementioned rotational limiting device. The rotating member is rotatably mounted on the fixed frame, and a rotating assembly 1 of the rotational limiting device is mounted on the rotating member. A first limiting assembly 2 and a second limiting assembly 3 are both mounted on the fixed frame. A trigger member 11, a rotating member 12, and the rotating member are capable of synchronously rotating relative to the fixed frame. The first limiting assembly 2 and the second limiting assembly 3 are positioned along the rotational path of the trigger member 11 and are used to rotationally limit the trigger member 11.

[0043] The medical equipment includes but is not limited to human body SPECT (single photon emission computed tomography) equipment. In addition, the application of the rotation limiting device is not limited to medical equipment, and the rotation limiting device can also be applied to other rotating equipment in industrial applications.

[0044] The present application provides a rotation limit device and a medical device. The rotation limit device can limit the rotation component 1 in both clockwise and counterclockwise directions through a first limit component 2 and a second limit component 3, and does not limit the starting angle of the rotation component 1. It can be applied to limit the rotation component 1 at any rotation angle. The limiting accuracy is high and the practicality is strong. It can prevent the rotation angle of the rotation component 1 from exceeding the threshold and breaking the cable, thereby ensuring the normal operation of the medical device.

[0045] Reference Figure 1 As shown, in one embodiment, the first limit assembly 2 is set at a first stop position 10, and the first limit assembly 3 is set at a second stop position 20. The second stop position 20 is a position corresponding to a rotation from the first stop position 10 along a first direction a at a predetermined angle θ, where the first direction a is a clockwise or counterclockwise direction.

[0046] Furthermore, the trigger member 11 is arranged between the first stop position 10 and the second stop position 20. In a specific example, referring to Figure 1 As shown, the initial position of the trigger member 11 is set between the first stop position 10 and the second stop position 20. The angle between the initial position of the trigger member 11 and the first stop position 10 is α, and the angle between the initial position of the trigger member 11 and the second stop position 20 is β. The sum of the angles α and β is the predetermined angle θ, that is, α+β=θ. The predetermined angle θ is set between 0° and 360°.

[0047] The first limiting assembly 2 and the first limiting assembly 3 are configured such that when the trigger member 11 rotates from the initial position in the first direction a or the second direction b, it can pass through the first limiting assembly 2 or the first limiting assembly 3 when it reaches the first stop position 10 or the second stop position 20 for the first time, and can be stopped and limited by the first limiting assembly 2 or the first limiting assembly 3 when it reaches the first stop position 10 or the second stop position 20 for the second time. The second direction b is opposite to the first direction a.

[0048] It should be noted that the first direction a can be set to clockwise or counterclockwise. Figure 1 As shown, when the first direction a is set to be clockwise, the second direction b is set to be counterclockwise. And when the first direction a is set to be counterclockwise, the second direction b is set to be clockwise.

[0049] Reference Figures 1 to 3 As shown, in a preferred embodiment, the first limiting assembly 2 includes: a telescopic member 4 and a fixed seat 5, and the telescopic member 4 is slidably arranged on the fixed seat 5. The telescopic member 4 is arranged on the rotation track of the trigger member 11, and the telescopic member 4 can be extended or retracted from the fixed seat 5, that is, the telescopic member 4 has an extended state and a retracted state.

[0050] Preferably, when the telescopic member 4 of the second position-limiting assembly 3 is extended, the telescopic member 4 of the first position-limiting assembly 2 is retracted; when the telescopic member 4 of the second position-limiting assembly 3 is retracted, the telescopic member 4 of the first position-limiting assembly 2 is extended.

[0051] In this way, the rotation stroke range of the rotating component 1 can be set to any angle between 360° and 720°, and the limit function can be achieved when the rotation angle of the rotating component 1 exceeds 360°.

[0052] In a specific embodiment, the angle between the first limit component 2 and the second limit component 3 is 90°, and the initial position of the trigger member 11 is set at any position between the first limit component 2 and the second limit component 3. At this time, the rotation angle of the trigger member 11 is 360°~450°.

[0053] In another specific embodiment, the angle between the first limit component 2 and the second limit component 3 is 180°, and the initial position of the trigger member 11 is set at any position between the first limit component 2 and the second limit component 3. At this time, the rotation angle of the trigger member 11 is 360°~540°.

[0054] In another specific embodiment, the angle between the first limit component 2 and the second limit component 3 is 270°, and the initial position of the trigger member 11 is set at any position between the first limit component 2 and the second limit component 3. At this time, the rotation angle of the trigger member 11 is 360°~630°.

[0055] It should be noted that when the telescopic state of the telescopic part 4 of the second limit component 3 is different from the telescopic state of the telescopic part 4 of the first limit component 2, when the trigger component 11 rotates in the first direction a or the second direction b, it can smoothly pass through the first limit component 2 and the second limit component 3 when it rotates to the first stop position 10 and the second stop position 20 for the first time, and be stopped and limited by the first limit component 2 or the second limit component 3 when it rotates to the first stop position 10 or the second stop position 20 for the second time. At this time, the rotation angle of the rotating component 1 is between 360° and 720°.

[0056] Reference Figures 2 to 4 As shown, the first limiting assembly 2 includes a first telescopic member 41 and a first fixed seat 51. The first telescopic member 41 has an extended state and a contracted state relative to the first fixed seat 51. The first telescopic member 41 can slide relative to the first fixed seat 51, thereby switching the first telescopic member 41 between the extended state and the contracted state.

[0057] Similarly, the second limiting assembly 3 includes a second telescopic member 42 and a second fixed seat 52. The second telescopic member 42 has an extended state and a contracted state relative to the second fixed seat 52, and the second telescopic member 42 can slide relative to the second fixed seat 52, thereby switching the second telescopic member 42 between the extended state and the contracted state.

[0058] Reference Figure 1 As shown, in a preferred embodiment, the fixed seat 5 is fixed to the side of the telescopic member 4 facing away from the rotating member 12, allowing the telescopic member 4 to slide radially in the rotating member 12. Specifically, the first fixed seat 51 is fixed to the side of the first telescopic member 41 facing away from the rotating member 12, and the second fixed seat 52 is fixed to the side of the second telescopic member 42 facing away from the rotating member 12. This structure allows the rotational trajectory of the trigger member 11 to be perpendicular to the sliding direction of the telescopic member 4, facilitating the telescopic member 4 to limit the position of the trigger member 11.

[0059] In a preferred embodiment, the first limiting assembly 2 and the second limiting assembly 3 are symmetrically arranged about the rotation center of the rotating member 12, that is, the first limiting assembly 2 and the second limiting assembly 3 are axially symmetrically arranged about the radial direction of the rotating member 12. The advantage of this is that the trigger member 11 can contact the same area of ​​the first telescopic member 41 and the second telescopic member 42, respectively, to ensure that the first telescopic member 41 and the second telescopic member 42 have the same limiting effect on the trigger member 11.

[0060] Reference Figures 2 to 4 As shown in a specific example, the telescopic member 4 is provided with a through-going inclined groove 43, which has a first end 431 and a second end 432. The first end 431 is away from the fixed seat 5, and the second end 432 is close to the fixed seat 5. The trigger member 11 is configured to enter the inclined groove 43 from the first end 431 or the second end 432 and slide within the inclined groove 43. When the trigger member 11 slides within the inclined groove 43, it can drive the telescopic member 4 to move, thereby extending or retracting the telescopic member 4 into the fixed seat 5.

[0061] Reference Figure 4 and Figure 5 , and combined with Figure 7 The trigger member 11 includes a fixedly connected connecting portion 111 and a positioning pin 112. The positioning pin 112 is disposed on a side of the connecting portion 111 close to the telescopic member 4. The positioning pin 112 is configured to enter the inclined groove 43 from the first end 431 when the telescopic member 4 is retracted, thereby pulling the telescopic member 4 out of the fixing seat 5 and causing the telescopic member 4 to transition from a retracted state to an extended state. The positioning pin 112 can then exit the inclined groove 43 from the second end 432 of the inclined groove 43. The positioning pin 112 is also configured to enter the inclined groove 43 from the second end 432 when the telescopic member 4 is extended, thereby pushing the telescopic member 4 into the fixing seat 5 and causing the telescopic member 4 to transition from an extended state to a retracted state. The positioning pin 112 can then exit the inclined groove 43 from the first end 431 of the inclined groove 43.

[0062] It should be noted that when the positioning pin 112 contacts the telescopic member 4 from the second end 432 when the telescopic member 4 is retracted, the positioning pin 112 can abut against the telescopic member 4, and the telescopic member 4 can then stop and limit the trigger member 11. When the positioning pin 112 contacts the telescopic member 4 from the first end 431 when the telescopic member 4 is extended, the positioning pin 112 can also abut against the telescopic member 4, and the telescopic member 4 can then also stop and limit the trigger member 11.

[0063] Reference Figure 4 and Figure 5 As shown, combined with Figure 6 In one example, the connecting portion 111 of the trigger member 11 is disposed above the telescopic member 4 so that the connecting portion 111 does not contact the telescopic member 4 during rotation. The positioning pin 112 of the trigger member 11 and the inclined slot 43 of the telescopic member 4 are located in the same horizontal plane, making it easy for the positioning pin 112 to enter the inclined slot 43 and drive the telescopic member 4 to move.

[0064] It should be noted that the present application does not limit the specific shape of the inclined groove 43 . The inclined groove 43 only needs to satisfy the requirement that the second end 432 is closer to the fixing seat 5 than the first end 431 .

[0065] Reference Figures 2 to 4 As shown, in a specific example, the inclined slot 43 is configured to first extend a distance away from the fixing base 5 at the first end 431 or the second end 432 , and then extend toward the fixing base 5 and pass through the telescopic member 4 .

[0066] In another specific example, the inclined groove 43 is configured to gradually incline toward the fixing seat 5 at the first end 431 and penetrate to form the second end 432 .

[0067] Reference Figure 5 As shown, in one embodiment, the trigger member 11 further includes a stopper 113, which is fixed to the connecting portion 111 and disposed on the same side as the positioning pin 112. The stopper 113 is configured to avoid the telescopic member 4 when the telescopic member 4 is retracted, thereby allowing the trigger member 11 to smoothly bypass the telescopic member 4. The stopper 113 is also configured to abut against the telescopic member 4 when the telescopic member 4 is extended, thereby achieving position limiting.

[0068] The present application does not limit the structure of the limiting portion 113 , and the limiting portion 113 may be configured as a boss, an elongated member, a cylindrical member, or other structures.

[0069] like Figures 2 to 4 As shown, a touch switch 6 is provided on the telescopic member 4. The touch switch 6 is used to be triggered by the trigger member 11 before the trigger member 11 contacts the telescopic member 4. After the touch switch 6 is triggered, a stop signal can be sent to the driving device.

[0070] In one embodiment, a touch switch 6 is disposed on the side of the telescopic member 4 that limits the trigger member 11. When triggered, the touch switch 6 releases a signal to stop the drive device. For example, the touch switch 6 controls the driver to cut off the driving force of the motor. After the touch switch 6 is triggered, the trigger member 11 can continue to rotate until it abuts against the telescopic member 4, thereby preventing the rotating assembly 1 from rotating further.

[0071] Continue to refer to Figure 5 In one example, the limit portion 113 is provided with a protrusion 114, which is used to trigger the touch switch 6 when the telescopic member 4 is in the extended state. In other examples, the limit portion 113 may not be provided with the protrusion 114, in which case the positioning pin 112 can be used to trigger the touch switch 6 when the telescopic member 4 is in the extended state.

[0072] It should be noted that the touch switch 6 is preferably located below the positioning pin 112 so that the positioning pin 112 does not interfere with the touch switch 6 when entering the inclined groove 43 of the telescopic member 4. The limiter 113 is located in the same horizontal plane as the touch switch 6 and the telescopic member 4, so that when the telescopic member 4 is in the extended state, the limiter 113 contacts the touch switch 6 and the telescopic member 4 in sequence.

[0073] Continue to refer to Figures 2 to 4 The telescopic member 4 is further provided with an elastic member 7, which is used to contact the trigger member 11 to limit the position. The provision of the elastic member 7 can reduce the force exerted by the trigger member 11 on the telescopic member 4. With this structure, when the trigger member 11 is limited by the telescopic member 4, the trigger member 11 is used to collide with the elastic member 7 to increase the collision distance, thereby reducing the instantaneous collision force.

[0074] The present application does not limit the specific structure of the elastic member 7. The elastic member 7 includes but is not limited to structures such as a spring (such as a nitrogen spring), an elastic sheet, and an elastic tube.

[0075] Reference Figure 2 As shown, a moving member (not numbered) is provided on one of the fixed seat 5 and the telescopic member 4 , and two locking grooves 8 are provided at intervals in the sliding direction of the telescopic member 4 on the other of the fixed seat 5 and the telescopic member 4 .

[0076] Furthermore, the movable member is used to be limited in one of the locking grooves 8 in a stationary state, so as to maintain the telescopic state of the telescopic member 4 when the telescopic member 4 does not interact with the trigger member 11. The movable member is also used to move out of the current locking groove 8 and move into another locking groove 8 after being subjected to a force, thereby changing the telescopic state of the telescopic member 4.

[0077] In a specific example, the moving member can be set as a spring pin (not shown), which can enter the locking groove 8 when not under force to prevent the telescopic member 4 from moving. The spring pin is also easy to deform and move out of the locking groove 8 after being subjected to force, allowing the telescopic member 4 to slide relative to the fixed base 5.

[0078] Reference Figures 6 to 12 As shown, in a non-limiting embodiment, the rotation and limiting process of the rotating assembly 1 is as follows:

[0079] like Figure 6 As shown, in this embodiment, when the trigger member 11 is in the initial position, the first telescopic member 41 is in a contracted state, and the second telescopic member 42 is in an extended state.

[0080] It should be noted that the telescopic state of the first telescopic member 41 and the second telescopic member 42 can be set according to the rotation angle of the trigger member 11. In other embodiments, when the trigger member 11 is in the initial position, the first telescopic member 41 can also be switched to the extended state, and the second telescopic member 42 can also be switched to the retracted state.

[0081] Furthermore, in this embodiment, the trigger member 11 can rotate along the second direction b when in the initial position, and can smoothly pass through the first limit assembly 2 when it rotates to the first stop position 10 for the first time. In this process, the trigger member 11 can drive the first telescopic member 41 in the contracted state to transform into the extended state (refer to Figure 7 and Figure 8 ).

[0082] It should be known that if the trigger member 11 rotates along the first direction a when in the initial position, the trigger member 11 can be stopped and limited because the second telescopic member 42 is in the extended state.

[0083] Then, the trigger member 11 continues to rotate along the second direction b, and can smoothly pass through the second limit assembly 3 when it rotates to the second stop position 20 for the first time. In this process, the trigger member 11 can drive the second telescopic member 42 in the extended state to transform into the retracted state (refer to Figure 8 and Figure 9 ).

[0084] Subsequently, the trigger member 11 continues to rotate in the second direction b, and is able to contact and limit the first telescopic member 41 in the extended state when it rotates to the first stop position 10 for the second time (refer to Figure 10 ).

[0085] Specifically, because the trigger member 11 has already driven the first telescopic member 41 to an extended state when it first passes the first stop position 10, the trigger member 11 preferentially contacts and triggers the touch switch 6 when it approaches the first stop position 10 in the second direction b for the second time. After the touch switch 6 is triggered, it releases a braking signal to the driver, which receives the braking signal and shuts off the motor. The trigger member 11 then continues to rotate and abuts against the first telescopic member 41. The extended first telescopic member 41 limits the trigger member 11, preventing it from continuing to rotate in the second direction b, thereby completing the counterclockwise position restriction of the trigger member 11. During this process, the rotation angle of the trigger member 11 is α+360°.

[0086] Afterwards, the trigger member 11 can only rotate along the first direction a because it is blocked by the first telescopic member 41. When the trigger member 11 rotates along the first direction a for the second time to the second stop position 20, it can smoothly pass through the second telescopic member 42. In this process, the trigger member 11 can drive the second telescopic member 42 in the contracted state to transform into the extended state (refer to Figure 10 and Figure 11 ).

[0087] Then, the trigger 11 continues to rotate along the first direction a and can smoothly pass through the first limit assembly 2 when it rotates to the first stop position 10 for the third time. In this process, the trigger 11 can drive the first telescopic member 41 in the extended state to transform into the retracted state (refer to Figure 11 and Figure 12 ).

[0088] Afterwards, the trigger member 11 continues to rotate in the first direction a, and can contact and limit the second telescopic member 42 in the extended state when it rotates to the second stop position 20 for the third time.

[0089] Specifically, because the trigger member 11 has driven the second telescopic member 42 to an extended state when it passes the second stop position 20 for the second time, the trigger member 11 preferentially contacts and triggers the touch switch 6 when it approaches the second stop position 20 along the first direction a for the third time. After the touch switch 6 is triggered, it releases a braking signal to the driver, which receives the braking signal and shuts off the motor. The trigger member 11 then continues to rotate and abuts against the second telescopic member 42. The extended second telescopic member 42 limits the trigger member 11, preventing it from continuing to rotate along the first direction a, thereby limiting the clockwise position of the trigger member 11. During this process, the rotation angle of the trigger member 11 is θ+360°. At this point, the trigger member 11 completes the entire rotation process.

[0090] It should be noted that after the trigger member 11 is limited in the first direction a by the second telescopic member 42, the trigger member 11 has returned to between the first stop position 10 and the second stop position 20, and the first telescopic member 41 is again in the retracted state, and the second telescopic member 42 is again in the extended state. At this time, the first telescopic member 41 and the second telescopic member 42 have returned to the telescopic state before the trigger member 11 rotated. In this case, the trigger member 11 can rotate again in the second direction b when a new round of rotation is required, and the above rotation process can be repeated.

[0091] In summary, the utility model provides a rotation limit device and medical equipment. The rotation limit device can realize the limitation of the rotating component 1 in the clockwise and counterclockwise directions through the first limiting component 2 and the second limiting component 3, and does not limit the starting angle of the rotating component 1. It can be used to limit the rotating component 1 at any rotation angle. The limiting accuracy is high and the practicality is strong. It can avoid the rotation angle of the rotating component 1 exceeding the threshold and breaking the cable, thereby ensuring the normal operation of the medical equipment.

[0092] The above description is only a description of the preferred embodiment of the present invention and does not limit the scope of the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure shall fall within the scope of protection of the present invention.

Claims

1. A rotation limiting device, characterized in that: The invention comprises a rotating assembly (1), a first limiting assembly (2) and a second limiting assembly (3); the rotating assembly (1) comprises a rotating part (12) and a triggering part (11); the triggering part (11) is arranged on the rotating part (12), and the triggering part (11) rotates synchronously with the rotating part (12); the first limiting assembly (2) and the second limiting assembly (3) are arranged at intervals on the rotation track of the triggering part (11); the initial position of the triggering part (11) is set between the first limiting assembly (2) and the second limiting assembly (3); the first limiting assembly (2) and the second limiting assembly (3) are both used to allow or prevent the triggering part (11) from passing through its own set position.

2. The rotation limiting device according to claim 1, characterized in that: The first limiting assembly (2) comprises: a telescopic member (4) and a fixed seat (5); the telescopic member (4) is slidably arranged on the fixed seat (5); and the telescopic member (4) can extend from or retract into the fixed seat (5).

3. The rotation limiting device according to claim 2, characterized in that: When the telescopic part of the second position-limiting assembly (3) is extended, the telescopic part of the first position-limiting assembly (2) is retracted; when the telescopic part of the second position-limiting assembly (3) is retracted, the telescopic part of the first position-limiting assembly (2) is extended.

4. The rotation limiting device according to claim 3, characterized in that: The first limiting assembly (2) and the second limiting assembly (3) are symmetrically arranged about the rotation center of the rotating member (12).

5. The rotation limiting device according to claim 3, characterized in that: The fixing seat (5) is fixed to a side of the telescopic member (4) facing away from the rotating member (12), and the telescopic member (4) is capable of sliding in the radial direction of the rotating member (12).

6. The rotation limiting device according to any one of claims 2 to 5, characterized in that: The telescopic member (4) is provided with a penetrating inclined groove (43); the inclined groove (43) has a first end and a second end, the first end is away from the fixed seat (5), and the second end is close to the fixed seat (5); the trigger member (11) is used to enter the inclined groove (43) from the first end (431) or the second end (432) and slide in the inclined groove (43).

7. The rotation limiting device according to claim 6, characterized in that: The trigger member (11) comprises a fixedly connected connecting portion (111) and a positioning pin (112), wherein the positioning pin (112) is arranged on a side of the connecting portion (111) close to the telescopic member (4); the positioning pin (112) is used to enter the inclined groove (43) from the first end (431) when the telescopic member (4) is retracted, and is used to enter the inclined groove (43) from the second end (432) when the telescopic member (4) is extended.

8. The rotation limiting device according to claim 7, characterized in that: The trigger member (11) further comprises a limiting portion (113), the limiting portion (113) being fixed on the connecting portion (111) and being arranged on the same side as the positioning pin (112); the limiting portion (113) being used to avoid the telescopic member (4) when the telescopic member (4) is retracted, and being used to abut against the telescopic member (4) when the telescopic member (4) is extended.

9. The rotation limiting device according to claim 2, characterized in that: The telescopic member (4) is provided with a touch switch (6) and an elastic member (7); the elastic member (7) is used to contact the trigger member (11) to limit the position; the touch switch (6) is used to be triggered by the trigger member (11) before the trigger member (11) contacts the telescopic member (4); and after the touch switch (6) is triggered, a stop signal can be sent to the driving device.

10. A medical device, characterized in that: The invention comprises a rotating component, a fixed frame and a rotation limiting device according to any one of claims 1 to 9, wherein the rotating component is rotatably arranged on the fixed frame, the rotating component (1) is arranged on the rotating component; the first limiting component (2) and the second limiting component (3) are arranged on the fixed frame.

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