Knob structure and medical equipment

Abstract

The utility model discloses a knob structure and medical equipment, and relates to the technical field of medical equipment accessories, a rotating shaft is rotatably arranged on a mounting rack, a first sleeve sleeves the rotating shaft, the first sleeve is connected with the mounting rack, and a second sleeve is rotatably connected to the first sleeve around the axis of the rotating shaft; a containing cavity is formed between the first sleeve and the second sleeve, a damping medium is arranged in the containing cavity, the rotary knob piece is connected with the rotating shaft and the second sleeve, when the rotary knob piece is rotated, the rotating shaft and the second sleeve can be driven to synchronously rotate around the axis of the rotating shaft, and the second sleeve can rotate relative to the first sleeve. At the moment, the damping medium can provide rotation resistance for the second sleeve, so that the knob piece can be rotated only by applying a certain acting force, the situation that the knob piece rotates excessively due to excessive force can be prevented, the knob piece can obtain better experience feeling when rotated, and mechanical abrasion of the rotary damping piece can be reduced.

Description

Technical Field

[0001] This application relates to the field of medical device accessories technology, and in particular to a knob structure and a medical device. Background Technology

[0002] In related technologies, the operation design of medical devices often uses knobs as parameter adjustment components. Specifically, the user manually rotates the knob, driving a connected potentiometer or encoder (referred to as "potentiometer" in this article for ease of explanation) to rotate synchronously. During rotation, the potentiometer converts mechanical displacement into an electrical signal output, thereby enabling precise adjustment and motion control of the medical device's operating parameters.

[0003] However, because the potentiometer's rotating shaft is too sensitive, users are prone to over-rotating the knob when operating it manually if they apply the wrong force (such as too much force), resulting in poor operation feel and a bad user experience. Utility Model Content

[0004] This application provides a knob structure and a medical device that can solve the technical problem of potentiometers being easily over-rotated.

[0005] In a first aspect, embodiments of this application provide a knob structure, which includes:

[0006] Mounting rack;

[0007] A rotating shaft is rotatably connected to the mounting bracket about its axis.

[0008] A rotary damping component includes a first sleeve and a second sleeve. The first sleeve is sleeved on the rotating shaft and connected to the mounting bracket. The second sleeve is rotatably connected to the first sleeve about the axis of the rotating shaft. A receiving cavity is formed between the first sleeve and the second sleeve, and a damping medium is provided in the receiving cavity.

[0009] A knob is connected to the rotating shaft and the second sleeve. When the knob is rotated to drive the rotating shaft and the second sleeve to rotate around the axis of the rotating shaft, the rotation damping element provides rotational resistance to the knob.

[0010] In some embodiments, the first sleeve has a through hole, the rotating shaft is movably inserted through the through hole, and one end of the rotating shaft extends out of the through hole and is connected to the knob.

[0011] In some embodiments, the first sleeve and the second sleeve are arranged along the extension direction of the axis of rotation, one of the first sleeve and the second sleeve is provided with an annular groove, and the other of the first sleeve and the second sleeve includes an annular protrusion inserted into the annular groove, and the gap between the annular protrusion and the inner peripheral sidewall of the annular groove forms the receiving cavity.

[0012] In some embodiments, the annular protrusion has a bottom surface that is opposite to and spaced apart from the bottom surface of the annular groove.

[0013] In some embodiments, along a direction perpendicular to the axis of rotation, the width of the annular groove is a, and the width of the annular protrusion is b, both a and b gradually increasing in the direction away from the bottom surface of the annular groove.

[0014] In some embodiments, the rotational damping element defines a receiving groove on the sidewall of the annular groove, the receiving groove communicating with the opening end of the annular groove, and the annular protrusion being inserted sequentially into the receiving groove and the annular groove;

[0015] The rotary damping component further includes a sealing structure, which is disposed in the receiving groove and extends around the annular protrusion to seal the gap between the groove end of the annular groove and the annular protrusion.

[0016] In some embodiments, a cover is provided at one end of the annular protrusion away from the bottom surface of the annular groove, the cover being placed over the groove opening end of the annular groove and abutting against the sealing structure.

[0017] In some embodiments, the sealing structure includes:

[0018] A first sealing ring is disposed within the receiving groove and fitted onto the annular protrusion;

[0019] The second sealing ring is disposed in the receiving groove, and the second sealing ring and the first sealing ring are arranged at intervals along the axis perpendicular to the rotation axis. The second sealing ring and the first sealing ring are respectively located on opposite sides of the annular protrusion.

[0020] In some embodiments, the knob structure further includes a connector having a mounting groove and a connecting hole communicating with the mounting groove, the rotating shaft extending into the mounting groove, and the connector extending from the connecting hole into the mounting groove and connected to the rotating shaft.

[0021] In some embodiments, the knob has a mounting groove, the inner wall of which is provided with at least one of a protrusion and a groove, the outer peripheral surface of the second sleeve is provided with at least the other of the protrusion and the groove, the second sleeve is disposed in the mounting groove, and the protrusion and the groove are engaged.

[0022] In some embodiments, the end face of the first sleeve facing the mounting bracket has at least one of a mounting portion and a mounting groove, and the side face of the mounting bracket facing the first sleeve has at least the other of the mounting portion and the mounting groove, wherein the mounting portion and the mounting groove are inserted into each other.

[0023] Secondly, embodiments of this application provide a medical device, characterized in that it includes a device body and a knob structure as described in any one of the above, wherein the mounting bracket is connected to the device body.

[0024] The knob structure and medical device based on the embodiments of this application have at least the following beneficial effects;

[0025] By rotating the rotating shaft onto the mounting bracket, the rotating shaft can rotate relative to the mounting bracket around its axis. Rotating the rotating shaft allows adjustment of the medical device's operating parameters. A first sleeve is fitted onto the rotating shaft and connected to the mounting bracket, keeping the first sleeve fixed to the bracket. A second sleeve is rotatably connected to the first sleeve around the axis of the rotating shaft, forming a receiving cavity between the two sleeves. This cavity contains a damping medium. A knob is connected to the rotating shaft and the second sleeve. When the knob is rotated, it drives the rotating shaft and the second sleeve to rotate synchronously around the axis of the rotating shaft. The second sleeve can also rotate relative to the first sleeve. The damping medium provides rotational resistance to the second sleeve, requiring a certain force to rotate the knob. This prevents over-rotation due to excessive force, resulting in a better user experience. Furthermore, the rotational resistance provided by the damping medium reduces mechanical wear on the rotating damping component, extending its service life. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the first exploded structure of the knob structure provided in the embodiments of this application;

[0028] Figure 2 This is a schematic diagram of the cross-sectional structure of the rotation damping component provided in the embodiments of this application;

[0029] Figure 3 This is a schematic diagram of a second exploded structure of the knob structure provided in the embodiments of this application;

[0030] Figure 4 This is a schematic diagram of a third exploded structure of the knob structure provided in the embodiments of this application.

[0031] 1. Mounting bracket; 2. Rotating shaft; 3. Rotation damping component; 31. First sleeve; 311. Through hole; 312. Mounting part; 313. Mounting groove; 32. Second sleeve; 301. Receiving cavity; 302. Annular groove; 303. Annular protrusion; 3031. Bottom surface; 304. Receiving groove; 33. Sealing structure; 331. First sealing ring; 332. Second sealing ring; 4. Knob; 41. Assembly groove; 42. Connecting hole; 43. Protrusion; 44. Groove; 5. Damping medium; 6. Cover; 7. Connector. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0033] Firstly, please refer to Figure 1 and Figure 2 This application provides a knob structure, which includes a mounting bracket 1, a rotating shaft 2, a rotation damping element 3, and a knob 4. The rotating shaft 2 is rotatably connected to the mounting bracket 1 and can rotate around its axis. The rotation damping element 3 may include a first sleeve 31 and a second sleeve 32. The first sleeve 31 is sleeved on the rotating shaft 2 and connected to the mounting bracket 1. The second sleeve 32 is rotatably connected to the first sleeve 31 so that the second sleeve 32 can rotate relative to the first sleeve 31 around its axis. A receiving cavity 301 is formed between the first sleeve 31 and the second sleeve 32, and a damping medium 5 is provided in the receiving cavity 301. The knob 4 is connected to the rotating shaft 2 and the second sleeve 32. When the knob 4 is rotated to drive the rotating shaft 2 and the second sleeve 32 to rotate around its axis, the rotation damping element 3 provides rotational resistance to the knob 4.

[0034] It should be noted that the knob structure can be installed on the main body of the medical device, enabling precise adjustment and motion control of the device's operating parameters. Specifically, the mounting bracket 1 can be a plate-like structure and serves directly as the control panel of the device. The rotating shaft 2 is rotatably connected to the mounting bracket 1 and is connected to a potentiometer or encoder. Rotating the rotating shaft 2 drives the connected potentiometer or encoder to rotate synchronously. Taking the connection between the rotating shaft 2 and the potentiometer as an example, during the rotation of the rotating shaft 2, the potentiometer converts the mechanical displacement into an electrical signal output, thereby achieving precise adjustment and motion control of the medical device's operating parameters.

[0035] The rotational damping element 3 can be sleeved on the rotating shaft 2. The rotational damping element 3 includes a first sleeve 31 and a second sleeve 32. Both the first sleeve 31 and the second sleeve 32 are cylindrical structures. The first sleeve 31 is sleeved on the rotating shaft 2 and is connected to the mounting bracket 1, so that the first sleeve 31 is fixed on the mounting bracket 1, that is, the first sleeve 31 cannot rotate relative to the mounting bracket 1 around the axis of the rotating shaft 2. The second sleeve 32 can be sleeved on the first sleeve 31 and can rotate relative to the first sleeve 31 around the axis of the rotating shaft 2. There is a gap between the first sleeve 31 and the second sleeve 32, which can form a receiving cavity 301. The receiving cavity 301 is provided with a damping medium 5. When the second sleeve 32 rotates relative to the first sleeve 31 around the axis of the rotating shaft 2, the damping medium 5 can provide rotational resistance to the second sleeve 32.

[0036] The knob 4 can be connected to both the rotating shaft 2 and the second sleeve 32 simultaneously, and the knob 4 can drive the rotating shaft 2 and the second sleeve 32 to rotate together around the axis of the rotating shaft 2. Specifically, when the knob 4 is rotated, it can drive the rotating shaft 2 and the second sleeve 32 to rotate synchronously around the axis of the rotating shaft 2, and the second sleeve 32 can rotate relative to the first sleeve 31. At this time, the damping medium 5 can provide rotational resistance to the second sleeve 32, so a certain force needs to be applied to rotate the knob 4. This can prevent the knob 4 from over-rotating due to excessive force, so that rotating the knob 4 can provide a better user experience. Furthermore, the rotational resistance provided by the damping medium 5 can reduce the mechanical wear of the rotating damping component 3 and improve its service life.

[0037] Please see Figures 1 to 3 In some embodiments, the first sleeve 31 has a through hole 311, the rotating shaft 2 is movably inserted through the through hole 311, and one end of the rotating shaft 2 extends out of the through hole 311 and is connected to the knob 4.

[0038] Optionally, the mounting bracket 1 has a through hole, and the rotating shaft 2 is sequentially movably inserted into the through hole and the through hole 311 of the first sleeve 31, so that the rotating shaft 2 can rotate relative to the mounting bracket 1 and the first sleeve 31 around the axis of the rotating shaft 2. The first sleeve 31 and the potentiometer are respectively located on opposite sides of the mounting bracket 1. The rotating shaft 2 has a first end and a second end arranged opposite to each other along the axial direction of the rotating shaft 2. The first end of the rotating shaft 2 is connected to the potentiometer, and the second end of the rotating shaft 2 is connected to the knob 4, so that rotating the knob 4 can drive the rotating shaft 2 to rotate, which makes it convenient for the user to adjust the operating parameters of the medical device through the knob structure.

[0039] Please see Figure 2 In some embodiments, the first sleeve 31 and the second sleeve 32 are arranged along the extension direction of the axis of rotation 2. One of the first sleeve 31 and the second sleeve 32 is provided with an annular groove 302, and the other of the first sleeve 31 and the second sleeve 32 includes an annular protrusion 303 inserted into the annular groove 302. The gap between the annular protrusion 303 and the inner peripheral sidewall of the annular groove 302 forms a receiving cavity 301.

[0040] In this embodiment, the first sleeve 31 includes an annular protrusion 303, which extends around the axis of rotation 2. The second sleeve 32 has an annular groove 302 at one end facing the first sleeve 31, which also extends around the axis of rotation 2. The annular protrusion 303 is inserted into the annular groove 302, and the gap between the annular protrusion 303 and the inner peripheral sidewall of the annular groove 302 can form a receiving cavity 301, thereby increasing the area of ​​the second sleeve 32 and the first sleeve 31 relative to each other. This increases the contact area between the damping medium 5 and the first sleeve 31 and the second sleeve 32. When the second sleeve 32 rotates relative to the first sleeve 31, the damping medium 5 can provide greater rotational resistance to the knob 4, further preventing the knob 4 from over-rotating.

[0041] Specifically, the annular protrusion 303 has an inner side and an outer side arranged opposite to each other. Both the inner and outer sides extend around the axis of rotation 2, and the inner side is closer to the axis of rotation 2 than the outer side. There is a first gap between the inner side and the inner peripheral sidewall of the annular groove 302, and there is also a second gap between the outer side and the inner peripheral sidewall of the annular groove 302. The first gap and the second gap can form a receiving cavity 301, so that there can be a damping medium 5 between the inner side and the inner peripheral sidewall of the annular groove 302, and there can also be a damping medium 5 between the outer side and the inner peripheral sidewall of the annular groove 302. When the second sleeve 32 rotates relative to the first sleeve 31, rotational resistance can be generated between the inner side and the second sleeve 32, and rotational resistance can also be generated between the outer side and the second sleeve 32, thereby providing greater rotational resistance for the knob 4 and further preventing the knob 4 from over-rotating.

[0042] In some other embodiments, the second sleeve 32 may include an annular protrusion 303, and the end of the first sleeve 31 facing the second sleeve 32 may have an annular groove 302. The annular protrusion 303 may be inserted into the annular groove 302. When the second sleeve 32 rotates relative to the first sleeve 31, the damping medium 5 may also provide rotational resistance to the knob 4.

[0043] Please see Figure 2 In some embodiments, the annular protrusion 303 has a bottom surface 3031, which is opposite to and spaced apart from the bottom surface of the annular groove 302.

[0044] Optionally, the bottom surface 3031 of the annular protrusion 303 is located between the inner and outer surfaces of the annular protrusion 303, and the inner surface, bottom surface 3031, and outer surface are connected in sequence. The bottom surface 3031 and the bottom surface of the annular groove 302 are relatively spaced apart along the axial direction of the rotation axis 2, so that there is a third gap between the bottom surface 3031 and the bottom surface of the annular groove 302. The first gap, the third gap, and the second gap are connected in sequence to form a receiving cavity 301, so that the damping medium 5 can be more evenly distributed in the receiving cavity 301. Thus, the damping medium 5 can provide more uniform rotational resistance for the knob 4, which can further improve the user experience of rotating the knob 4.

[0045] In addition, the damping medium 5 can be located at the third gap, that is, there is a damping medium 5 between the bottom surface 3031 and the bottom surface of the annular groove 302. When the second sleeve 32 rotates relative to the first sleeve 31, rotational resistance can also be generated between the bottom surface 3031 and the bottom surface of the annular groove 302, thereby providing greater rotational resistance for the knob 4 and further preventing the knob 4 from rotating excessively.

[0046] Please see Figure 2In some embodiments, along the direction perpendicular to the axis of rotation 2, the width of the annular groove 302 is a, and the width of the annular protrusion 303 is b, and both a and b gradually increase in the direction away from the bottom surface of the annular groove 302.

[0047] Optionally, along the extension direction of the axis of rotation 2, the annular protrusion 303 has a top and a bottom oppositely disposed, and the annular groove 302 has a bottom surface and an opening end oppositely disposed. Since the groove width of the annular groove 302 is a and the width of the annular protrusion 303 is b along the direction perpendicular to the axis of rotation 2, and both a and b gradually increase in the direction away from the bottom surface of the annular groove 302, the groove width a at the opening end of the annular groove 302 is greater than the groove width a at the bottom surface of the annular groove 302, and the width b at the top of the annular protrusion 303 is greater than the width b at the bottom of the annular protrusion 303, so that when the annular protrusion 303 is inserted into the annular groove 302, the annular protrusion 303 can be easily inserted into the annular groove 302 from the opening end of the annular groove 302, so that the bottom of the annular protrusion 303 is close to the bottom surface of the annular groove 302, and the top of the annular protrusion 303 is close to the opening end of the annular groove 302.

[0048] Furthermore, as both a and b gradually increase in the direction away from the bottom surface of the annular groove 302, the distance between the inner side of the annular protrusion 303 and the axis of rotation 2 gradually decreases in the direction away from the bottom surface of the annular groove 302, while the distance between the outer side of the annular protrusion 303 and the axis of rotation 2 gradually increases, so that both the inner and outer sides are inclined relative to the axis of rotation 2.

[0049] It should be noted that, under the condition that all other conditions remain the same, the area of ​​the inner side when it is parallel to the axis of rotation 2 is smaller than the area of ​​the inner side when it is inclined relative to the axis of rotation 2, and the area of ​​the outer side when it is parallel to the axis of rotation 2 is also smaller than the area of ​​the outer side when it is inclined relative to the axis of rotation 2. Therefore, when both a and b gradually increase in the direction away from the bottom surface of the annular groove 302, the area of ​​the inner and outer sides can be increased, so that the rotation damping element 3 can provide greater rotation resistance for the knob element 4.

[0050] Please see Figure 2 In some embodiments, the rotation damper 3 defines a receiving groove 304 on the sidewall of the annular groove 302. The receiving groove 304 is connected to the groove end of the annular groove 302. The annular protrusion 303 is inserted into the receiving groove 304 and the annular groove 302 in sequence. The rotation damper 3 also includes a sealing structure 33, which is disposed in the receiving groove and extends around the annular protrusion to seal the gap between the groove end of the annular groove 302 and the annular protrusion 303.

[0051] In this embodiment, the second sleeve 32 is provided with an annular groove 302 as an example. The end of the second sleeve 32 away from the bottom surface of the annular groove 302 has a receiving groove 304. The receiving groove 304 is connected to the groove opening end of the annular groove 302. The receiving groove 304 extends around the axis of rotation 2 and is perpendicular to the axis of rotation 2. The groove width of the receiving groove 304 is greater than the groove width of the annular groove 302, so that the annular protrusion 303 can be easily inserted into the receiving groove 304 and the annular groove 302 in sequence. During the process of inserting the annular protrusion 303 into the annular groove 302, the receiving groove 304 can be used to contain the damping medium 5 overflowing from the annular groove 302, which can prevent the damping medium 5 from leaking.

[0052] The rotary damping component 3 also includes a sealing structure 33, which is an overall annular structure and is disposed in the receiving groove 304. The sealing structure 33 extends around the annular protrusion 303, so that the sealing structure 33 can seal the gap between the groove end of the annular groove 302 and the annular protrusion, thereby increasing the sealing performance of the rotary damping component 3 and preventing the damping medium 5 from leaking.

[0053] Please see Figure 2 In some embodiments, a cover 6 is provided at one end of the annular protrusion 303 away from the bottom surface of the annular groove 302. The cover 6 covers the groove opening end of the annular groove 302 and abuts against the sealing structure 33.

[0054] Optionally, the cover 6 can be connected to one end of the annular protrusion 303 away from the bottom surface of the annular groove 302, and the cover 6 can cover the groove opening end of the annular groove 302, so that the cover 6 can press the sealing structure 33 into the receiving groove 304, so that the sealing structure 33 can seal the groove opening end of the annular groove 302. The cover 6 can increase the sealing capacity of the sealing structure 33 and further prevent the damping medium 5 from leaking.

[0055] Please see Figure 2 In some embodiments, the sealing structure 33 includes a first sealing ring 331 and a second sealing ring 332. Both the first sealing ring 331 and the second sealing ring 332 are disposed in the receiving groove 304. The first sealing ring 331 is sleeved on the annular protrusion 303. The first sealing ring 331 and the second sealing ring 332 are arranged at intervals along a direction perpendicular to the axis of rotation 2. The first sealing ring 331 and the second sealing ring 332 are respectively located on opposite sides of the annular protrusion 303.

[0056] It should be noted that after the annular protrusion 303 is sequentially inserted into the receiving groove 304 and the annular groove 302, the annular protrusion 303 divides the receiving groove 304 into a first sub-groove and a second sub-groove. The first sub-groove and the second sub-groove are arranged along the axis perpendicular to the rotation axis 2. The outer side of the annular protrusion 303 corresponds to the first sub-groove, and the inner side of the annular protrusion 303 corresponds to the second sub-groove. The first sealing ring 331 is disposed in the first sub-groove and is sleeved on the annular protrusion 303, so that the first sealing ring 331 abuts against the outer side of the annular protrusion 303 to form a seal. The second sealing ring 332 is disposed in the second sub-groove and abuts against the inner side of the annular protrusion 303 to form a seal.

[0057] When the annular protrusion 303 is inserted into the receiving groove 304 and the annular groove 302 in sequence, the cover 6 will squeeze the first sealing ring 331 and the second sealing ring 332, so that the first sealing ring 331 can be deformed and abut against the inner wall of the first sub-groove to form a seal, and the second sealing ring 332 can be deformed and abut against the inner wall of the second sub-groove to form a seal. Thus, the first sealing ring 331 and the second sealing ring 332 can jointly seal the gap between the receiving groove 304 and the annular protrusion 303, thereby sealing the groove end of the annular groove 302 to prevent the damping medium 5 from leaking.

[0058] Please see Figure 3 and Figure 4 In some embodiments, the knob structure further includes a connector 7. The knob 4 has a mounting groove 41 and a connecting hole 42 communicating with the mounting groove 41. The rotating shaft 2 extends into the mounting groove 41, and the connector 7 extends into the mounting groove 41 from the connecting hole 42. The connector 7 is connected to the rotating shaft 2.

[0059] Optionally, the knob 4 has a mounting groove 41 on the side facing the mounting bracket 1, and the peripheral side of the knob 4 has a connecting hole 42. The axial direction of the connecting hole 42 is set at an angle to the axial direction of the rotating shaft 2. The rotating shaft 2 can extend into the mounting groove 41, and the connector 7 can extend into the mounting groove 41 from the connecting hole 42. The connector 7 can be connected to the rotating shaft 2, so that the knob 4 can be connected to the rotating shaft 2 as a whole, thereby the knob 4 can drive the rotating shaft 2 to rotate together.

[0060] Please see Figure 1 and Figure 3 In some embodiments, the knob 4 has a mounting groove 41, the inner wall of the mounting groove 41 is provided with at least one of a protrusion 43 and a groove 44, the outer peripheral surface of the second sleeve 32 is provided with at least the other of a protrusion 43 and a groove 44, the second sleeve 32 is disposed in the mounting groove 41, and the protrusion 43 and the groove 44 are engaged.

[0061] In this embodiment, the inner wall of the mounting groove 41 of the knob 4 is provided with a groove 44, which communicates with the mounting groove 41. The groove 44 can extend along the axial direction of the rotation shaft 2 to the side of the knob 4 facing the mounting bracket 1, so that the groove 44 can penetrate the side of the knob 4 facing the mounting bracket 1. The outer peripheral surface of the second sleeve 32 is provided with a protrusion 43. When the second sleeve 32 is placed in the mounting groove 41, the protrusion 43 can be inserted into the groove 44 to engage the second sleeve 32 with the knob 4, so that the knob 4 can rotate together with the second sleeve 32, and the rotation damping member 3 can provide rotational resistance for the knob 4.

[0062] In some other embodiments, the inner wall of the assembly groove 41 may be provided with a protrusion 43, and the outer peripheral surface of the second sleeve 32 may be provided with a groove 44. Similarly, the protrusion 43 is inserted into the groove 44 to engage the second sleeve 32 with the knob 4, so that the rotation damping member 3 can provide rotational resistance to the knob 4.

[0063] Please see Figure 1 In some embodiments, the end face of the first sleeve 31 facing the mounting bracket 1 has at least one of a mounting portion 312 and a mounting groove 313, and the side face of the mounting bracket 1 facing the first sleeve 31 has at least the other of a mounting portion 312 and a mounting groove 313, wherein the mounting portion 312 and the mounting groove 313 are inserted into each other.

[0064] Optionally, the end face of the first sleeve 31 facing the mounting bracket 1 has a mounting portion 312, which protrudes towards the mounting bracket 1 relative to the first sleeve 31. The side of the mounting bracket 1 facing the first sleeve 31 has a mounting groove 313. When the first sleeve 31 is connected to the mounting bracket 1, the mounting portion 312 and the mounting groove 313 are inserted into each other, which can restrict the first sleeve 31 from rotating around the axis of rotation 2. This allows the second sleeve 32 to rotate relative to the first sleeve 31 around the axis of rotation 2 when the knob 4 is rotated, so that the rotation damping member 3 can provide rotational resistance to the knob 4.

[0065] In some other embodiments, the end face of the first sleeve 31 facing the mounting bracket 1 may have a mounting groove 313, and the side face of the mounting bracket 1 facing the first sleeve 31 may have a mounting part 312. Similarly, the first sleeve 31 may be restricted from rotating around the axis of rotation 2 by the mounting part 312 being inserted into the mounting groove 313.

[0066] Secondly, a medical device is provided in the embodiments of this application. The medical device includes a device body and a knob structure as described above. The mounting bracket 1 of the knob structure is connected to the device body.

[0067] The beneficial effects of the medical device in this application embodiment are the same as those of the knob structure described above, and will not be repeated here.

[0068] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0069] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A knob structure, characterized in that, include: Mounting rack; A rotating shaft is rotatably connected to the mounting bracket about its axis. A rotary damping component includes a first sleeve and a second sleeve. The first sleeve is sleeved on the rotating shaft and connected to the mounting bracket. The second sleeve is rotatably connected to the first sleeve about the axis of the rotating shaft. A receiving cavity is formed between the first sleeve and the second sleeve, and a damping medium is provided in the receiving cavity. A knob is connected to the rotating shaft and the second sleeve. When the knob is rotated to drive the rotating shaft and the second sleeve to rotate around the axis of the rotating shaft, the rotation damping element provides rotational resistance to the knob.

2. The knob structure according to claim 1, characterized in that, The first sleeve has a through hole, the rotating shaft is movably inserted through the through hole, and one end of the rotating shaft extends out of the through hole and is connected to the knob.

3. The knob structure according to claim 1, characterized in that, The first sleeve and the second sleeve are arranged along the extension direction of the axis of rotation. One of the first sleeve and the second sleeve is provided with an annular groove, and the other of the first sleeve and the second sleeve includes an annular protrusion inserted into the annular groove. The gap between the annular protrusion and the inner peripheral sidewall of the annular groove forms the receiving cavity.

4. The knob structure according to claim 3, characterized in that, The annular protrusion has a bottom surface, which is opposite to and spaced apart from the bottom surface of the annular groove.

5. The knob structure according to claim 3, characterized in that, Along the axis perpendicular to the rotation axis, the width of the annular groove is a, and the width of the annular protrusion is b. Both a and b gradually increase in the direction away from the bottom surface of the annular groove.

6. The knob structure according to claim 3, characterized in that, The rotational damping element defines a receiving groove on the side wall of the annular groove, the receiving groove being connected to the groove opening of the annular groove, and the annular protrusion being inserted into the receiving groove and the annular groove in sequence. The rotary damping component further includes a sealing structure, which is disposed in the receiving groove and extends around the annular protrusion to seal the gap between the groove end of the annular groove and the annular protrusion.

7. The knob structure according to claim 6, characterized in that, The annular protrusion has a cover at one end away from the bottom surface of the annular groove. The cover is placed on the groove opening of the annular groove and abuts against the sealing structure.

8. The knob structure according to claim 6, characterized in that, The sealing structure includes: A first sealing ring is disposed within the receiving groove and fitted onto the annular protrusion; The second sealing ring is disposed in the receiving groove, and the second sealing ring and the first sealing ring are arranged at intervals along the axis perpendicular to the rotation axis. The second sealing ring and the first sealing ring are respectively located on opposite sides of the annular protrusion.

9. The knob structure according to claim 1, characterized in that, The knob structure also includes a connector, the knob having a mounting groove and a connecting hole communicating with the mounting groove, the rotating shaft extending into the mounting groove, and the connector extending from the connecting hole into the mounting groove and connected to the rotating shaft.

10. The knob structure according to claim 1, characterized in that, The knob has a mounting groove, and the inner wall of the mounting groove is provided with at least one of a protrusion and a groove. The outer peripheral surface of the second sleeve is provided with at least the other of the protrusion and the groove. The second sleeve is disposed in the mounting groove, and the protrusion and the groove are engaged.

11. The knob structure according to claim 1, characterized in that, The first sleeve has at least one of a mounting portion and a mounting groove on its end face facing the mounting bracket, and the mounting bracket has at least the other of the mounting portion and the mounting groove on its side facing the first sleeve, wherein the mounting portion and the mounting groove are inserted into each other.

12. A medical device, characterized in that, It includes a device body and a knob structure as described in any one of claims 1-11, wherein the mounting bracket is connected to the device body.

Images