Ultrasonic probe puncture frame

Abstract

A fixing frame comprises a frame body and an annular fixing piece, the annular fixing piece can be fixed to an ultrasonic probe in a sleeving mode, the frame body comprises a connecting base and two installation side plates arranged on the connecting base, and a gap is preset between the two installation side plates so that an installation gap for installing a movable frame body can be formed. A fixed rotating shaft is arranged at one end of the movable frame body and rotationally connected to the arc-shaped mounting part, a movable shaft is arranged at the other end of the movable frame body, an arc-shaped opening groove is formed in the arc-shaped guide part, the movable shaft can move along the arc-shaped opening groove, and a guide needle hole for guiding a puncture needle is formed in the movable frame body. And a rotation limiting assembly is arranged on the arc-shaped mounting part. According to the ultrasonic probe puncture frame, the movable frame body can rotate according to needs in the using process, so that the angle of the movable frame body is adjusted, and the rotating direction of the movable frame body can be limited through the rotating limiting assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an ultrasonic probe puncture frame. Background Art

[0002] In clinical use, the ultrasound probe image and the ultrasound probe puncture holder work together to guide the puncture needle into the patient's body for interventional treatment. The puncture holder is typically mounted on the ultrasound probe and, under ultrasound guidance, guides the puncture needle to the target location in the body for procedures such as cytological biopsy, histological biopsy, and cyst aspiration. The puncture holder's primary function is to provide stable support and fixation, ensuring that the ultrasound probe does not move or shake during the puncture process, thereby improving the accuracy and safety of the puncture.

[0003] Ultrasound probe puncture holders are common diagnostic and treatment instruments in hospitals. Existing guides typically use separate needle holders that accommodate different needle sizes. Because the guides must adjust the puncture direction according to the ultrasound device's guide wire during use, existing needle holders lack the ability to easily lock the needle holder after adjusting the angle, making the needle holder unstable. Therefore, there is a need for an ultrasound probe puncture holder that allows for easy angle adjustment. Utility Model Content

[0004] The purpose of the utility model is to provide an ultrasonic probe puncture frame to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] An ultrasonic probe puncture frame includes a fixed frame that can be fixed to the ultrasonic probe, and also includes a movable frame, the fixed frame includes a frame and an annular fixing piece provided on the frame, the annular fixing piece can be fixed on the ultrasonic probe through an outer sleeve, the frame includes a connecting seat and two mounting side plates provided on the connecting seat, the connecting seat is connected to the annular fixing piece, a preset gap is provided between the two mounting side plates to form an installation gap for the movable frame to be installed, the mounting side plates include an arc-shaped guide portion and an arc-shaped mounting portion arranged opposite to each other, one end of the movable frame is provided with a fixed rotating shaft, the fixed rotating shaft is rotatably connected to the arc-shaped mounting portion, the other end of the movable frame is provided with a movable shaft, the arc-shaped guide portion is provided with an arc-shaped opening groove, the movable shaft can move along the arc-shaped opening groove, the movable frame is provided with a guide needle hole for guiding the puncture needle, and a rotation limiting assembly is provided on the arc-shaped mounting portion, the rotation limiting assembly is arranged corresponding to the fixed rotating shaft to limit the rotation of the movable frame.

[0007] The ultrasonic probe puncture frame is provided with an axial hole on the arc-shaped mounting portion, and the fixed rotating shafts are provided on opposite sides of the movable frame. The fixed rotating shafts are rotatably mounted on the axial hole.

[0008] In the above-mentioned ultrasonic probe puncture frame, the arc-shaped mounting portions of the two mounting side plates are both provided with the rotation limiting components, and the two rotation limiting components respectively limit the rotation of the two fixed rotating shafts.

[0009] The above-mentioned ultrasound probe puncture frame, the rotation limiting assembly includes a mounting shell and a rotating ratchet and a rotating adjustment member arranged in the mounting shell, the mounting shell is installed on the arc-shaped mounting portion, and a rotating mounting cavity and a locking mounting cavity are formed inside the mounting shell, the rotating ratchet is installed on the fixed rotating shaft and is located in the rotating mounting cavity, and the rotating adjustment member is located in the locking mounting cavity.

[0010] In the above-mentioned ultrasonic probe puncture frame, the rotation limiting assembly further includes a first rotation limiting member and a second rotation limiting member, and the first rotation limiting member and the second rotation limiting member are respectively arranged on opposite sides of the rotation adjusting member.

[0011] The above-mentioned ultrasound probe puncture frame, the first rotation limiting member and the second rotation limiting member each include a rotating end and a limiting end, the rotating end is rotatably installed at an end of the locking installation cavity away from the rotating installation cavity, and the limiting end is provided with a ratchet.

[0012] In the above-mentioned ultrasonic probe puncture frame, the first rotation limiting member and the second rotation limiting member are installed in the locking installation cavity in an inverted eight-shaped shape, and a spring member is provided on one side of each of the first rotation limiting member and the second rotation limiting member.

[0013] The above-mentioned ultrasound probe puncture frame, the rotation adjustment member includes a fan-shaped limiting body, the fan-shaped limiting body includes two radial surfaces and an arc-shaped limiting surface arranged between the two radial surfaces, the fan-shaped limiting body is provided with a rotation operating shaft, the mounting shell is provided with a mounting hole for the rotation operating shaft to pass through, and the end of the rotation operating shaft extends from the mounting hole and is connected to an operating button.

[0014] In the above technical solution, the ultrasonic probe puncture frame provided by the utility model includes an ultrasonic probe puncture frame, a fixed frame including a frame body and an annular fixing part arranged on the frame body, the annular fixing part can be fixed on the ultrasonic probe, the frame body includes a connecting seat and two mounting side plates arranged on the connecting seat, a preset gap is set between the two mounting side plates to form an mounting gap for the movable frame to be installed, the movable frame can be rotatably installed in the mounting gap, the movable frame can be rotated as needed during use, so as to adjust the angle of the movable frame, and the rotation direction of the movable frame can be limited by the rotation limiting assembly. When the movable frame is rotated to a suitable angle, the rotation limiting assembly can lock the movable frame, and a guide needle hole for guiding the puncture needle is provided on the movable frame. The guide needle hole is used to guide the puncture needle, so that the puncture needle will not move or shake during the puncture process, thereby improving the accuracy and safety of the puncture. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 A schematic diagram of the installation of an ultrasound probe puncture stand provided in an embodiment of the present utility model;

[0017] Figure 2 A schematic structural diagram of a fixing frame provided in an embodiment of the present utility model;

[0018] Figure 3 A schematic structural diagram of a mounting housing provided in an embodiment of the present utility model;

[0019] Figure 4 A schematic structural diagram of a rotation limiting assembly provided in an embodiment of the present utility model.

[0020] Description of reference numerals:

[0021] 1. Fixed frame; 11. Annular fixing member; 12. Frame body; 121. Connecting seat; 122. Mounting side plate; 123. Arc-shaped guide portion; 124. Arc-shaped mounting portion; 125. Arc-shaped opening slot; 2. Movable frame; 21. Fixed rotating shaft; 22. Movable shaft; 23. Nut; 24. Rotating ratchet; 3. Rotation limiting assembly; 31. First limiting member; 32. Second limiting member; 33. Rotating end; 34. Limiting end; 35. Ratchet; 36. Spring member; 37. Rotation adjusting member; 370. Fan-shaped limiting body; 371. Arc-shaped limiting surface; 372. Radial surface; 38. Rotation operating shaft; 39. Operation button; 4. Mounting shell; 41. Rotation mounting cavity; 42. Locking mounting cavity; 5. Puncture needle; 6. Ultrasound probe. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] like Figure 1-4 As shown, the present invention provides an ultrasonic probe puncture frame, including a movable frame 212 and a fixing frame 1 that can be fixed on the ultrasonic probe 6, the fixing frame 1 includes a frame 12 and an annular fixing member 11 arranged on the frame 12, the annular fixing member 11 can be fixed on the ultrasonic probe 6, the frame 12 includes a connecting seat 121 and two mounting side plates 122 arranged on the connecting seat 121, the connecting seat 121 is connected to the annular fixing member 11, and a preset gap is set between the two mounting side plates 122 to form an installation gap for the movable frame 212 to be installed, and the mounting side plates 122 include arcs arranged relatively shaped guide portion 123 and an arc-shaped mounting portion 124, a fixed rotating shaft 21 is provided at one end of the movable frame 212, the fixed rotating shaft 21 is rotatably connected to the arc-shaped mounting portion 124, and a movable shaft 22 is provided at the other end of the movable frame 212, an arc-shaped opening groove 125 is provided on the arc-shaped guide portion 123, and the movable shaft 22 can move along the arc-shaped opening groove 125, and a guide needle hole for guiding the puncture needle 5 is provided on the movable frame 212, and a rotation limiting component 3 is provided on the arc-shaped mounting portion 124, and the rotation limiting component 3 is provided in correspondence with the fixed rotating shaft 21 to limit the rotation of the movable frame 212.

[0024] Specifically, the fixing frame 1 includes a frame body 12 and an annular fixing member 11 arranged on the frame body 12. The annular fixing member 11 can be fixed on the ultrasonic probe 6. The annular fixing member 11 can be a metal ring, a plastic belt, or other structures. The frame body 12 includes a connecting seat 121 and two mounting side plates 122. The connecting seat 121 and the mounting side plates 122 can be an integrated structure. The connecting seat 121 is fixedly connected to the annular fixing member 11. In this way, when the annular fixing member 11 is fixed on the ultrasonic probe 6, the connecting seat 121 is fixedly mounted on one side of the ultrasonic probe 6. The mounting side plate 122 is provided with an arc-shaped guide portion 123 and an arc-shaped mounting portion 124. The arc-shaped guide portion 123 and the arc-shaped mounting portion 124 are respectively arranged at different positions on the same side of the connecting seat 121. An axial hole is provided on the arc-shaped mounting portion 124, and an arc-shaped opening groove 125 is provided on the arc-shaped guide portion 123, and the arc-shaped opening groove 125 takes the axial hole as the axis.

[0025] In this embodiment, a gap is preset between the two mounting plates to form an installation gap, and the movable frame 212 is installed in the installation gap. The movable frame 212 is a strip piece, and a guide needle hole is provided on the movable frame 212. The guide needle hole passes through the movable frame 212, and the guide needle hole is used to guide the puncture needle 5, so that the puncture needle 5 will not move or shake during the puncture process, thereby improving the accuracy and safety of the puncture. A fixed rotating shaft 21 and a movable shaft 22 are respectively provided at both ends of the movable frame 212. The fixed rotating shaft 21 is rotatably mounted on the shaft hole of the arc-shaped mounting portion 124, and the movable shaft 22 is restricted in the arc-shaped opening groove 125. The movable shaft 22 can move along the arc-shaped opening groove 125. At the same time, a rotation limiting component 3 is provided on the arc-shaped mounting portion 124. The rotation limiting component 3 has a limiting effect on the rotation direction of the fixed rotation, so that the rotation limiting component 3 can only rotate in the required direction. At the same time, the fixed rotating shaft 21 can also be locked by the rotation limiting component 3, so that the movable frame 212 is maintained at a suitable angle.

[0026] The ultrasonic probe 6 puncture frame provided by the present invention comprises a fixing frame 1 including a frame body 12 and an annular fixing member 11 arranged on the frame body 12. The annular fixing member 11 can be fixed on the ultrasonic probe 6 by outer sleeve. The frame body 12 comprises a connecting seat 121 and two mounting side plates 122 arranged on the connecting seat 121. A preset gap is provided between the two mounting side plates 122 to form an installation gap for the movable frame body 212 to be installed. The movable frame body 212 can be rotatably installed in the installation gap. The movable frame body 212 can be rotated as needed during use to adjust the angle of the movable frame body 212, and the rotation direction of the movable frame body 212 can be limited by the rotation limiting assembly 3. When the movable frame body 212 is rotated to a suitable angle, the rotation limiting assembly 3 can lock the movable frame body 212. A guide needle hole for guiding the puncture needle 5 is provided on the movable frame body 212. The guide needle hole is used to guide the puncture needle 5, so that the puncture needle 5 will not move or shake during the puncture process, thereby improving the accuracy and safety of the puncture.

[0027] In this embodiment, preferably, an axis hole is provided on the arc-shaped mounting portion 124, and fixed rotating shafts 21 are provided on the opposite sides of the movable frame 212. The fixed rotating shaft 21 is rotatably mounted on the axis hole, and a rotation limiting component 3 is provided on the arc-shaped mounting portion 124 of the two mounting side plates 122. The two rotation limiting components 3 respectively limit the rotation of the two fixed rotating shafts 21; the two fixed rotating shafts 21 are independent, that is, the two fixed rotating shafts 21 are not connected, and a rotation limiting component 3 is correspondingly provided on each fixed rotating shaft 21. The rotation of the fixed rotating shaft 21 is limited by the rotation limiting component 3, so that the fixed rotating shaft 21 can only rotate in a preset direction.

[0028] In this embodiment, preferably, the rotation limiting assembly 3 includes a mounting shell 4 and a rotating ratchet 24 and a rotating adjustment member 37 arranged in the mounting shell 4. The mounting shell 4 is mounted on the arc-shaped mounting portion 124. The mounting shell 4 is fixedly mounted on the side of the arc-shaped mounting portion 124 away from the mounting gap. A rotating mounting cavity 41 and a locking mounting cavity 42 are formed inside the mounting shell 4. The rotating ratchet 24 is mounted on the fixed rotating shaft 21 and is located in the rotating mounting cavity 41. The rotating adjustment member 37 is located in the locking mounting cavity 42. The rotating adjustment member 37 is located on one side of the rotating ratchet 24, thereby limiting the movement of the rotating ratchet 24.

[0029] In this embodiment, preferably, the rotation limiting assembly 3 also includes a first rotation limiting member 31 and a second rotation limiting member 32, and the first rotation limiting member 31 and the second rotation limiting member 32 are respectively arranged on opposite sides of the rotation adjusting member 37, and the first rotation limiting member 31 and the second rotation limiting member 32 both include a rotating end 33 and a limiting end 34, and the rotating end 33 is rotatably installed in the locking mounting cavity 42 at an end away from the rotating mounting cavity 41, and a ratchet 35 is provided on the limiting end 34; the first rotation limiting member 31 and the second rotation limiting member 32 are in the shape of a bar, and the rotating ends 33 of the first rotation limiting member 31 and the second rotation limiting member 32 are rotatably installed in the locking mounting cavity 42 through a connecting shaft, and the ratchet 35 at the limiting end 34 can be two or more, and the first and second arc-shaped pressing surfaces are respectively provided on opposite sides of the limiting ends 34 of the first rotation limiting member 31 and the second rotation limiting member 32.

[0030] In this embodiment, preferably, the first rotation limiting member 31 and the second rotation limiting member 32 are installed in the locking installation cavity 42 in an inverted eight-shaped manner, and a spring member 36 is provided on one side of each of the first rotation limiting member 31 and the second rotation limiting member 32. The rotation adjustment member 37 includes a fan-shaped limiting body 370, and the fan-shaped limiting body 370 includes two radial surfaces 372 and an arc-shaped limiting surface 371 arranged between the two radial surfaces 372. A rotation operating shaft 38 is provided on the fan-shaped limiting body 370, and a mounting hole for the rotation operating shaft 38 to pass through is provided on the mounting shell 4. The end of the rotation operating shaft 38 extends from the mounting hole and is connected to an operating button 39; the rotation operating shaft 38 can be driven to rotate by the operating button 39, so that the fan-shaped limiting body 370 is driven to rotate and has two working positions: a first working position and a second working position, so that the first rotation limiting member 31 and the second rotation limiting member 32 respectively have a first working state and a second working state.

[0031] In this embodiment, the two rotation limiting assemblies 3 are respectively mounted on the two mounting side plates 122. The transmission matching relationship between the fan-shaped limiting body 370, the first rotation limiting member 31 and the second rotation limiting member 32 of one of the rotation limiting assemblies 3 is now explained: when the arc-shaped limiting surface 371 of the fan-shaped limiting body 370 corresponds to the first rotation limiting member 31, the fan-shaped limiting body 370 is in the first working position, the first rotation limiting member 31 is pressed and separated from the rotating ratchet 24, and the spring member 36 connected to the first rotation limiting member 31 is in a compressed state. At this time, the radial surface 372 of the fan-shaped limiting body 370 corresponds to the second rotation limiting member 32, and the spring member 36 connected to the second rotation limiting member 32 is also in a compressed state, but the ratchet 35 at the end of the second rotation limiting member 32 is engaged with the rotating ratchet 24, that is, the first rotation limiting member 31 is in the second working state, and the second rotation limiting member 32 is in the first working state. When the body 212 rotates in the direction close to the connecting seat 121 (the first rotation direction), the tooth groove of the rotating ratchet 24 first contacts the first arc-shaped pressure surface of the second rotation limiting member 32, and the tooth groove of the rotating ratchet 24 applies a force perpendicular to the first arc-shaped pressure surface, thereby preventing the second rotation limiting member 32 from rotating. In this way, the tooth groove of the rotating ratchet 24 is locked with the first arc-shaped pressure surface, and the rotating ratchet 24 cannot rotate in the first rotation direction. When the movable frame 212 rotates in the direction away from the connecting seat 121 (the second rotation direction), the tooth groove of the rotating ratchet 24 first contacts the second arc-shaped pressure surface of the second rotation limiting member 32, and the tooth groove of the rotating ratchet 24 applies a circumferential rotational force on the first arc-shaped pressure surface, thereby allowing the second rotation limiting member 32 to be driven to rotate and press the spring member 36. After the second rotation limiting member 32 rotates, it separates from the rotating ratchet 24, and the rotating ratchet 24 can rotate in the second rotation direction.

[0032] Similarly, when the arc-shaped limiting surface 371 of the sector-shaped limiting body 370 corresponds to the second rotation limiting member 32, the second rotation limiting member 32 is pressed and separated from the rotating ratchet 24. At this time, the sector-shaped limiting body 370 is in the second working position, and the spring member 36 connected to the second rotation limiting member 32 is in a compressed state. At this time, the radial surface 372 of the sector-shaped limiting body 370 corresponds to the first rotation limiting member 31, and the spring member 36 connected to the first rotation limiting member 31 is also in a compressed state, but the ratchet teeth 35 at the end of the first rotation limiting member 31 are engaged with the rotating ratchet 24, that is, the second rotation limiting member 32 is in the second working state, and the first rotation limiting member 31 is in the first working state. At this time, when the movable frame 212 rotates in the direction away from the connecting seat 121 (the second rotation direction), the tooth groove of the rotating ratchet 24 first aligns with the first rotation limiting member The first arc-shaped pressing surface of the component 31 is in contact with the tooth groove of the rotating ratchet 24, and a force perpendicular to the first arc-shaped pressing surface is applied, so that the second rotation limiting component 32 cannot rotate. The tooth groove of the rotating ratchet 24 is locked with the first arc-shaped pressing surface, and the rotating ratchet 24 and the movable frame 212 cannot rotate in the second rotation direction. When the movable frame 212 rotates in the direction close to the connecting seat 121 (the first rotation direction), the tooth groove of the rotating ratchet 24 first contacts the second arc-shaped pressing surface of the first rotation limiting component 31, and the tooth groove of the rotating ratchet 24 applies a circumferential rotational force to the second arc-shaped pressing surface, so that the first rotation limiting component 31 can be driven to rotate to press the spring component 36. After the first rotation limiting component 31 rotates, it separates from the rotating ratchet 24, and the rotating ratchet 24 and the movable frame 212 can rotate in the first rotation direction.

[0033] When in use, the rotation operating shaft 38 can be driven to rotate by operating the operating button 39 according to the needs of use, so that the sector-shaped limiting body 370 rotates to limit the rotation of the rotating ratchet 24. If the movable frame 212 needs to be rotated in the direction close to the connecting seat 121 (first rotation direction), both sector-shaped limiting bodies 370 are rotated to the second working position, and the arc-shaped limiting surface 371 of the sector-shaped limiting body 370 corresponds to the second rotation limiting member 32, and the radial surface 372 of the sector-shaped limiting body 370 corresponds to the first rotation limiting member 31. The second rotation limiting member 32 is in the second working state, and the first rotation limiting member 31 is in the first working state. The movable frame 212 can only rotate in the first rotation direction. Conversely, if the movable frame 212 needs to be rotated in the direction away from the connecting seat 121 (second rotation direction), the two sector-shaped limiting bodies 370 are rotated to the first working position. When the movable frame 212 is in the working position, the arc-shaped limiting surface 371 of the sector-shaped limiting body 370 corresponds to the first rotation limiting member 31, and the radial surface 372 of the sector-shaped limiting body 370 corresponds to the second rotation limiting member 32. The first rotation limiting member 31 is in the second working state, and the second rotation limiting member 32 is in the first working state. The movable frame 212 can only rotate in the direction away from the connecting seat 121 (the second rotation direction). At the same time, when the movable frame 212 is rotated to a suitable angle, one of the operating buttons 39 can be rotated, so that one sector-shaped limiting body 370 is rotated to the first working position and the other sector-shaped limiting body 370 is rotated to the second working position. In this way, the rotating ratchet 24 and the movable frame 212 can neither rotate in the first rotation direction nor in the second rotation direction, so that the fixed rotating shaft 21 cannot rotate, thereby fixing the movable frame 212.

[0034] In this embodiment, optionally, threaded sections are provided at both ends of the movable shaft 22, and rotating nuts 23 are provided on the threaded sections. When the movable frame 212 is rotated to a suitable angle, the rotating nut 23 can be rotated, so that the rotating nut 23 rotates on the threaded section to press against the mounting side plate 122, thereby further fixing the movable frame 212.

[0035] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An ultrasound probe puncture frame, comprising a fixing frame capable of being fixed on an ultrasound probe, characterized in that: , The two mounting plates are connected to each other with a hook at their link, and the hook at their link is connected to the hook at two locations.

2. The ultrasonic probe puncture holder according to claim 1, characterized in that: An axis hole is provided on the arc-shaped mounting portion, and the fixed rotating shafts are provided on opposite sides of the movable frame. The fixed rotating shafts are rotatably mounted on the axis hole.

3. The ultrasonic probe puncture holder according to claim 1, characterized in that: The arc-shaped mounting portions of the two mounting side plates are both provided with the rotation limiting components, and the two rotation limiting components respectively limit the rotation of the two fixed rotating shafts.

4. The ultrasonic probe puncture holder according to claim 1, characterized in that: The rotation limiting assembly includes a mounting shell and a rotating ratchet and a rotating adjustment member arranged in the mounting shell. The mounting shell is mounted on the arc-shaped mounting portion. A rotating mounting cavity and a locking mounting cavity are formed inside the mounting shell. The rotating ratchet is mounted on the fixed rotating shaft and is located in the rotating mounting cavity. The rotating adjustment member is located in the locking mounting cavity.

5. The ultrasonic probe puncture holder according to claim 4, characterized in that: The rotation limiting assembly further includes a first rotation limiting member and a second rotation limiting member, wherein the first rotation limiting member and the second rotation limiting member are respectively disposed on opposite sides of the rotation adjusting member.

6. The ultrasonic probe puncture holder according to claim 5, characterized in that: The first rotation limiting member and the second rotation limiting member each include a rotating end and a limiting end. The rotating end is rotatably mounted on an end of the locking mounting cavity away from the rotating mounting cavity, and a ratchet is provided on the limiting end.

7. The ultrasonic probe puncture holder according to claim 6, characterized in that: The first rotation limiting member and the second rotation limiting member are installed in the locking installation cavity in an inverted eight-shaped shape, and a spring member is provided on one side of each of the first rotation limiting member and the second rotation limiting member.

8. The ultrasonic probe puncture holder according to claim 7, characterized in that: The rotation adjustment member includes a fan-shaped limiting body, which includes two radial surfaces and an arc-shaped limiting surface arranged between the two radial surfaces. A rotation operating shaft is provided on the fan-shaped limiting body, and a mounting hole for the rotation operating shaft to pass through is provided on the mounting shell. The end of the rotation operating shaft extends from the mounting hole and is connected to an operating button.

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