Sheath stepless adjusting mechanism and medical grinding device

Abstract

The invention relates to a sheath stepless adjusting mechanism and a medical grinding device. A sheath adjusting assembly drives an axial adjusting sleeve to move in the axial direction and enables an elastic piece to deform in a self-adaptive mode so as to adjust the axial position of the sheath assembly in a stepless mode; when the unlocking limiting body rotates to the locking position, the axial adjusting sleeve is axially locked so as to lock the axial position of the sheath assembly. According to the invention, stepless automatic adjustment of the sheath can be realized, so that the grinding operation is more efficient and safer, and the product performance is improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a sheath stepless adjustment mechanism and a medical grinding device. Background Art

[0002] In the related art, the sheathed grinding head has an adjustable relative position between the sheath and the grinding head in the axial direction. By adjusting the position of the sheath in the axial direction, the sheath and the grinding head can move relative to each other, thereby controlling the sawing depth of the grinding head. However, the sheathed grinding head in the related art only has the function of manually adjusting the sheath, so it is inconvenient to operate the grinding head during grinding, and the safety is low. Summary of the invention

[0003] Based on this, it is necessary to overcome the defects of the prior art and provide a sheath stepless adjustment mechanism and a medical grinding device, which can improve the convenience and safety of operation.

[0004] A sheath stepless adjustment mechanism, connected to the sheath assembly, comprises:

[0005] handle body assembly;

[0006] An unlocking limiter is rotatably disposed on the handle assembly, the unlocking limiter has a locking position and an unlocking position, and the unlocking limiter can rotate between the locking position and the unlocking position;

[0007] An axial adjustment sleeve is disposed on the handle assembly and can move in the axial direction, and the axial adjustment sleeve cooperates with the unlocking limiter; an elastic member is connected to the axial adjustment sleeve;

[0008] A sheath adjustment component, one end of which is connected to the axial adjustment sleeve, and the other end is connected to the sheath component; wherein,

[0009] When the unlocking limit body rotates to the unlocking position, the sheath adjustment assembly drives the axial adjustment sleeve to move in the axial direction and causes the elastic member to deform adaptively to steplessly adjust the axial position of the sheath assembly; when the unlocking limit body rotates to the locking position, the axial adjustment sleeve is axially locked.

[0010] In one embodiment, the unlocking limit body includes an unlocking limit sleeve, and the distal end of the unlocking limit sleeve is provided with a first movable recess extending in the circumferential direction and a second movable recess extending in parallel with the axial direction thereof, the first movable recess is connected with the second movable recess on a first side in the circumferential direction and is arranged corresponding to the unlocking position, and the first movable recess is arranged corresponding to the locking position on a second side in the circumferential direction; a limiting member is provided at the proximal end of the axial adjustment sleeve, and the limiting member can move along the first movable recess and can move along the second movable recess.

[0011] In one embodiment, a side of the entrance of the second active recess close to the first active recess includes an arc-shaped transition wall.

[0012] In one embodiment, a first annular groove is formed on the handle body assembly along its circumferential direction, a first flange is provided on the inner wall of the unlocking limit sleeve, and the first flange is movably disposed in the first annular groove; and / or a second annular groove is formed on the inner wall of the unlocking limit sleeve along its circumferential direction, the handle body assembly is provided with a second flange, and the second flange is movably disposed in the second annular groove.

[0013] In one embodiment, the handle body assembly includes a handle body main body, a first support sleeve and a second support sleeve; the first support sleeve is fixedly mounted inside the handle body main body, and the distal end of the first support sleeve extends to the outside of the handle body main body; the unlocking limit sleeve is rotatably mounted on the distal end of the first support sleeve; the second support sleeve is fixedly mounted inside the first support sleeve, and the distal end of the second support sleeve extends to the outside of the first support sleeve, and the axial adjustment sleeve is movably arranged on the second support sleeve along the axial direction; the elastic member is a spring, and the spring is mounted on the outside of the second support sleeve, and the opposite ends of the elastic member are respectively abutted against the proximal end of the axial adjustment sleeve and the first support sleeve.

[0014] In one embodiment, the sheath stepless adjustment mechanism also includes an outer cover, which is arranged on the outside of the unlocking limit body and is connected to the unlocking limit body; the outer cover can also be rotatably arranged on the outside of the proximal end of the axial adjustment sleeve and the proximal end of the sheath adjustment assembly.

[0015] In one of the embodiments, the sheath stepless adjustment mechanism further comprises an elastic sleeve sleeved on the outside of the handle assembly;

[0016] The outer cover is provided with a first alignment mark, and the outer wall of the handle body assembly is provided with a second alignment mark corresponding to the first alignment mark.

[0017] In one embodiment, the sheath adjustment assembly includes a manual adjustment shell and a movable sleeve; the manual adjustment shell is rotatably sleeved on the outside of the axial adjustment sleeve, and the manual adjustment shell is relatively fixed with the axial adjustment sleeve in the axial direction; the proximal end of the axial adjustment sleeve extends out of the manual adjustment shell and extends into the inside of the unlocking limiter;

[0018] The movable sleeve is arranged inside the manual adjustment shell, and the movable sleeve is used to be connected with the sheath assembly. The manual adjustment shell is connected with the movable sleeve, and when the manual adjustment shell rotates, the movable sleeve can be driven to adjust the position along the axial direction; when the manual adjustment shell does not rotate, the movable sleeve is relatively fixed with the manual adjustment shell in the axial direction.

[0019] In one embodiment, a third spiral guide portion is formed on the inner wall of the manual adjustment shell, a fourth guide portion is provided on the outer wall of the movable sleeve, and a sliding groove extending parallel to the axial direction is formed on the side wall of the axial adjustment sleeve. The fourth guide portion can be slidably inserted into the sliding groove, and the fourth guide portion also cooperates with the third guide portion.

[0020] In one embodiment, the sheath stepless adjustment mechanism also includes a limit shell, which is detachably mounted on the distal end of the axial adjustment sleeve, and the limit shell and the distal end of the sheath adjustment component abut against each other in the axial direction, and a protrusion is provided on the outer wall of the axial adjustment sleeve, and the protrusion and the proximal end of the sheath adjustment component abut against each other in the axial direction.

[0021] A medical grinding device, comprising the sheath stepless adjustment mechanism, and also comprising a sheath assembly, an outer knife assembly, an inner knife assembly and a connecting shaft; the sheath assembly is sleeved on the outside of the outer knife assembly, the proximal end of the sheath assembly is connected to the sheath adjustment assembly, the outer knife assembly is fixedly connected to the handle body assembly, the inner knife assembly is rotatably inserted into the interior of the outer knife assembly, the inner knife assembly is connected to the connecting shaft, and the connecting shaft is used to be connected to the power shaft of the motor.

[0022] The above-mentioned sheath stepless adjustment mechanism and medical grinding device, during use, when the unlocking limiter rotates to the locking position, the unlocking limiter limits the axial adjustment sleeve from moving in the axial direction. At this time, the sheath adjustment component can be operated to manually adjust the position of the sheath component in the axial direction; when the unlocking limiter rotates to the unlocking position, the axial adjustment sleeve can move in the axial direction and make the elastic member deform adaptively. At this time, the position of the sheath component in the axial direction can be adjusted by manual adjustment, and the stepless adjustment of the sheath component in the axial direction can also be achieved. Specifically, when the sheath component is subjected to force in the axial direction, the sheath component drives the sheath adjustment component to move in the axial direction, and the sheath adjustment component correspondingly drives the axial adjustment sleeve to move in the axial direction and make the elastic member deform adaptively, that is, the sheath component is adaptively free to stretch and move axially under the elastic force of the elastic member, and the stepless automatic adjustment of the position is achieved. It can be seen that the sheath component can be adjusted in two modes, that is, the sheath can be manually adjusted, and the stepless automatic adjustment of the sheath can be achieved, so that the grinding operation can be performed more efficiently and safely, and the product performance is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of a medical grinding device according to an embodiment of the present application.

[0024] Figure 2 for Figure 1 Enlarged structural diagram at A.

[0025] Figure 3 for Figure 1 Enlarged structural diagram at B.

[0026] Figure 4 for Figure 1 Enlarged structural diagram at C.

[0027] Figure 5 for Figure 1 Structural diagram of the sheath stepless adjustment mechanism in the device shown.

[0028] Figure 6 for Figure 5 Structural diagram of the unlocking limiter in the structure shown.

[0029] 10. Sheath stepless adjustment mechanism; 11. Handle assembly; 111. First annular groove; 112. Handle body; 113. First support sleeve; 1131. Second boss; 114. Second support sleeve; 1141. Fourth boss; 1142. Second guide; 115. Third support sleeve; 1151. First boss; 1152. Third boss; 116. Bearing; 117. First elastic ring; 118. Third annular groove; 12. Unlocking limiter; 121. First movable recess; 122. Second movable recess; 123. Arc transition wall; 124. First A flange; 13, elastic member; 14, axial adjustment sleeve; 141, limit member; 142, protrusion; 143, fifth boss; 144, first guide; 145, sliding groove; 15, manual adjustment shell; 151, third guide; 16, movable sleeve; 161, fourth guide; 162, mounting groove; 17, outer cover; 18, elastic sleeve; 191, second elastic ring; 192, limit shell; 20, sheath assembly; 21, sheath; 22, connecting pipe; 30, outer knife assembly; 40, inner knife assembly; 41, grinding head; 42, inner knife rod; 50, connecting shaft. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] In the description of this application, it should be noted that the proximal end refers to the end of the instrument or component close to the operator, and the distal end refers to the end of the instrument or component away from the operator; the axial direction refers to the direction parallel to the center line of the distal end and the proximal end of the instrument or component, the radial direction refers to the direction perpendicular to the axial direction, and the circumferential direction refers to the direction around the axial direction. It should be noted that the axial direction in this embodiment refers to Figure 1 and Figure 5 The direction shown by Z.

[0032] See also Figure 1 and Figure 5, an embodiment of the present application provides a sheath stepless adjustment mechanism 10, the sheath stepless adjustment mechanism 10 comprises: a handle body assembly 11, an unlocking limiter 12, an elastic member 13, an axial adjustment sleeve 14 and a sheath adjustment assembly. The unlocking limiter 12 is rotatably arranged on the handle body assembly 11 and has a locking position and an unlocking position, and the unlocking limiter 12 can be rotated to the locking position and the unlocking position. The elastic member 13 is arranged inside the unlocking limiter 12. The axial adjustment sleeve 14 is arranged between the handle body assembly 11 and the unlocking limiter 12, and is connected to the handle body assembly 11 through the elastic member 13 and can move in the axial direction. Specifically, the axial adjustment sleeve 14 is movably arranged on the handle body assembly 11 in the axial direction. The axial adjustment sleeve 14 is inserted into the unlocking limiter 12. One end of the sheath adjustment assembly is connected to the axial adjustment sleeve 14, and the other end of the sheath adjustment assembly is connected to the sheath assembly 20. When the unlocking limit body 12 rotates to the locking position, the unlocking limit body 12 limits the axial adjustment sleeve 14 from moving in the axial direction; when the unlocking limit body 12 rotates to the unlocking position, the axial adjustment sleeve 14 can move in the axial direction driven by the sheath adjustment assembly and make the elastic member 13 adaptively deform to steplessly adjust the position of the sheath assembly along the axial direction.

[0033] Specifically, the sheath adjustment assembly includes a manual adjustment shell 15 and a movable sleeve 16. The manual adjustment shell 15 is rotatably sleeved on the outside of the axial adjustment sleeve 14, and the manual adjustment shell 15 is relatively fixed with the axial adjustment sleeve 14 in the axial direction. The movable sleeve 16 is arranged inside the manual adjustment shell 15, and the movable sleeve 16 is used to connect with the sheath assembly 20. The manual adjustment shell 15 is connected with the movable sleeve 16, and when the manual adjustment shell 15 rotates, it can drive the movable sleeve 16 to adjust the position in the axial direction; when the manual adjustment shell 15 does not rotate, the movable sleeve 16 is relatively fixed with the manual adjustment shell 15 in the axial direction.

[0034] The manual adjustment shell 15 is relatively fixed in position with the axial adjustment sleeve 14 in the axial direction, which means that the manual adjustment shell 15 cannot move relative to the axial adjustment sleeve 14 in the axial direction. Similarly, when the manual adjustment shell 15 is not rotated, the movable sleeve 16 is relatively fixed in position with the manual adjustment shell 15 in the axial direction, which means that the movable sleeve 16 cannot move relative to the manual adjustment shell 15 in the axial direction.

[0035] During use, when the unlocking limiter 12 rotates to the locking position, the unlocking limiter 12 limits the axial adjustment sleeve 14 from moving in the axial direction, and the position of the sheath assembly 20 in the axial direction can be adjusted manually. Specifically, the manual adjustment shell 15 is rotated, and the manual adjustment shell 15 drives the movable sleeve 16 to adjust the position in the axial direction, and the movable sleeve 16 can drive the sheath assembly 20 to adjust the position in the axial direction accordingly.

[0036] In addition, when the unlocking limiter 12 rotates to the unlocking position, the axial adjustment sleeve 14 can move in the axial direction and make the elastic member 13 deform adaptively. At this time, the position of the sheath assembly 20 in the axial direction can be adjusted by manual adjustment, and the sheath assembly 20 can also be adjusted steplessly in the axial direction. Specifically, when the sheath assembly 20 is subjected to force in the axial direction, the sheath assembly 20 drives the movable sleeve 16 to move in the axial direction. Since the movable sleeve 16 is relatively fixed with the manual adjustment shell 15 in the axial direction when the manual adjustment shell 15 is not rotated, it can drive the manual adjustment shell 15 to move in the axial direction. The manual adjustment shell 15 correspondingly drives the axial adjustment sleeve 14 to move in the axial direction and makes the elastic member 13 deform adaptively. That is, the sheath assembly 20 is adaptively free to telescope and move in the axial direction under the elastic force of the elastic member 13, so as to achieve stepless automatic position adjustment.

[0037] It can be seen that the sheath assembly 20 can be adjusted in two modes, that is, the sheath 21 can be adjusted manually, and the sheath 21 can be adjusted steplessly and automatically, so that the grinding operation can be performed more efficiently and safely, and the product performance is improved.

[0038] Of course, as some optional solutions, the sheath adjustment component is not limited to the above-mentioned structure including the manual adjustment shell 15 and the movable sleeve 16, and can also be flexibly adjusted and set to other manual adjustment structures according to actual needs, as long as the position of the sheath component 20 along the axial direction can be adjusted by manual adjustment. For example, the movable sleeve 16 can be omitted, and the sheath adjustment component is directly connected to the sheath component 20. When the sheath adjustment component rotates, it directly drives the sheath component 20 to be steplessly adjusted along the axial direction.

[0039] See also Figure 5 and Figure 6In one embodiment, the unlocking limit body 12 includes an unlocking limit sleeve. The distal end of the unlocking limit sleeve is provided with a first movable recess 121 extending in the circumferential direction and a second movable recess 122 extending in parallel to the axial direction thereof. The first movable recess 121 is connected to the second movable recess 122 on the first side in the circumferential direction and is arranged corresponding to the unlocking position, and the first movable recess 121 is arranged corresponding to the locking position on the second side in the circumferential direction. The proximal end of the axial adjustment sleeve 14 is provided with a limit member 141, which can move along the first movable recess 121 and the second movable recess 122. In this way, when the unlocking limit body 12 rotates, so that the limit piece 141 rotates to the second side of the first movable recess 121 in the circumferential direction, that is, the unlocking limit body 12 rotates to the locked position, the unlocking limit body 12 and the axial adjustment sleeve 14 are relatively fixed in the axial direction, and the position of the sheath assembly 20 in the axial direction can only be adjusted by rotating the manual adjustment shell 15. When the manual adjustment shell 15 is not rotated, the sheath 21 adjustment assembly is subjected to force and cannot compress the elastic member 13 to adjust the axial position; when the unlocking limit body 12 rotates, so that the limit piece 141 rotates to the position where the first movable recess 121 and the second movable recess 122 are connected to each other, that is, the unlocking limit body 12 rotates to the unlocking position, when the sheath assembly 20 is subjected to force, the elastic member 13 adaptively deforms, and the unlocking limit body 12 and the axial adjustment sleeve 14 can axially move and adjust the position.

[0040] In some embodiments, the limiting member 141 includes but is not limited to a limiting pin, a limiting shaft, a limiting rod or a limiting protrusion arranged on the proximal end of the axial adjustment sleeve 14, and can be flexibly adjusted and arranged according to actual needs.

[0041] Specifically, the wall thickness of the proximal end of the axial adjustment sleeve 14 is preferably greater than the wall thickness of other parts of the axial adjustment sleeve 14 , thereby improving the installation stability of the limiting member 141 .

[0042] In one embodiment, the entrance of the second movable recess 122 includes a curved transition wall 123 on one side close to the first movable recess 121. In this way, when the stopper 141 moves between the first movable recess 121 and the second movable recess 122, the curved transition wall 123 plays a guiding role, so that the movement and adjustment of the stopper 141 can be smoother, and the jamming noise defect can be prevented.

[0043] In one embodiment, a first annular groove 111 is formed on the handle body assembly 11 along its circumferential direction, a first flange 124 is provided on the inner wall of the unlocking limit sleeve, and the first flange 124 is movably provided in the first annular groove 111; and / or, a second annular groove is provided on the inner wall of the unlocking limit sleeve along its circumferential direction, a second flange is provided on the handle body assembly 11, and the second flange is movably provided in the second annular groove. In this way, the unlocking limit sleeve can only rotate relative to the handle body assembly 11 along its circumferential direction, so as to realize rotation to the locking position or the unlocking position; the unlocking limit sleeve cannot move along the axial direction on the handle body assembly 11 to adjust the position.

[0044] In one embodiment, the handle assembly 11 includes a handle body 112, a first support sleeve 113, and a second support sleeve 114. The first support sleeve 113 is fixedly sleeved inside the handle body 112, and the distal end of the first support sleeve 113 extends out of the handle body 112. Optionally, a step is provided on the outer wall of the first support sleeve 113, and the handle body 112 is sleeved on the step. The step of the first support sleeve 113 cooperates with the distal end surface of the handle body 112 to form a first annular groove 111, which is convenient for processing. Of course, the first annular groove 111 can also be directly formed on the outer wall of the first support sleeve 113.

[0045] In addition, the unlocking limit sleeve is rotatably sleeved on the distal end of the first support sleeve 113. The second support sleeve 114 is fixedly sleeved inside the first support sleeve 113, and the distal end of the second support sleeve 114 extends out of the first support sleeve 113. The axial adjustment sleeve 14 is movably arranged on the second support sleeve 114 along the axial direction. The elastic member 13 is, for example, a spring, and the spring is sleeved on the outside of the second support sleeve 114. The opposite ends of the elastic member 13 are respectively abutted against the proximal end of the axial adjustment sleeve 14 and the first support sleeve 113. In this way, the handle body assembly 11 includes the handle body 112, the first support sleeve 113 and the second support sleeve 114, which can be easily processed and assembled together.

[0046] On the basis of the above-mentioned embodiment, the handle body assembly 11 further includes a third support sleeve 115 connected between the first support sleeve 113 and the second support sleeve 114. The third support sleeve 115 is sleeved inside the first support sleeve 113 and outside the second support sleeve 114. The proximal end of the third support sleeve 115 extends outside the first support sleeve 113, and the third support sleeve 115 is used to install a bearing 116 inside, and the inner knife assembly 40 is rotatably inserted into the bearing 116.

[0047] Specifically, in order to facilitate the assembly of the first support sleeve 113, the second support sleeve 114 and the third support sleeve 115, a first boss 1151 is provided on the outer wall of the distal end of the third support sleeve 115, a second boss 1131 is provided on the inner wall of the first support sleeve 113, and the first boss 1151 is positioned and matched with the second boss 1131 in the axial direction. In addition, a third boss 1152 is provided on the inner wall of the third support sleeve 115, and the proximal end of the second support sleeve 114 is positioned and matched with the third boss 1152 in the axial direction.

[0048] Optionally, the proximal end of the elastic member 13 abuts against the second boss 1131 .

[0049] In some embodiments, a fourth boss 1141 is provided on the distal outer wall of the second support sleeve 114. The fourth boss 1141 plays a positioning role for the axial adjustment sleeve 14 in the axial direction. Optionally, a fifth boss 143 is provided on the proximal inner wall of the axial adjustment sleeve 14. The fourth boss 1141 and the fifth boss 143 are positioned and matched in the axial direction. In this way, the fourth boss 1141 plays a limiting role, which can prevent the axial adjustment sleeve 14 from detaching from the second support sleeve 114 in the axial direction.

[0050] In some embodiments, the handle assembly 11 further includes a first elastic ring 117 mounted on the outer wall of the first support sleeve 113. The first elastic ring 117 includes but is not limited to being made of rubber material. The first elastic ring 117 abuts against the inner wall of the unlocking limiter 12. When the unlocking limiter 12 rotates, the first elastic ring 117 increases the rotation resistance of the unlocking limiter 12 by rubbing against the unlocking limiter 12, thereby improving the feel of the rotation operation.

[0051] In order to realize that the axial adjustment sleeve 14 is movably sleeved on the handle body assembly 11 in the axial direction and prevent the axial adjustment sleeve 14 from rotating on the handle body assembly 11, a first guide portion 144 is provided on the axial adjustment sleeve 14, and a second guide portion 1142 on the handle body assembly 11 is slidably matched with the first guide portion 144. Optionally, the first guide portion 144 includes but is not limited to being set as a guide ball, a guide block, a guide rod or a guide shaft, etc., and the second guide portion 1142 is a guide groove provided on the handle body assembly 11, and the second guide portion 1142 is extended in parallel to the axial direction.

[0052] See also Figure 3 and Figure 5In a specific embodiment, the first guide portion 144 is disposed on the first fixed axis on the inner wall of the axial adjustment sleeve 14, and the second guide portion 1142 is a guide groove disposed on the outer wall of the second support sleeve 114, and the first fixed ball moves along the guide groove. In this way, the axial adjustment sleeve 14 moves on the second support sleeve 114 along the axial direction, and does not rotate leftward or rightward relative to the second support sleeve 114, thereby preventing the shaking from causing rotational displacement in the circumferential direction. In addition, since the axial adjustment sleeve 14 is fixedly disposed relative to the handle body assembly 11 in the circumferential direction, it is convenient for the doctor to accurately rotate and adjust the unlocking limiter 12 to the unlocking state or the locking state during the operation.

[0053] In one embodiment, the sheath stepless adjustment mechanism 10 further includes an outer cover 17. The outer cover 17 is disposed outside the unlocking limit body 12, and the outer cover 17 is connected to the unlocking limit body 12. The outer cover 17 can also be rotatably disposed outside the proximal end of the axial adjustment sleeve 14 and the proximal end of the manual adjustment shell 15. In this way, by rotating and adjusting the outer cover 17, the outer cover 17 can correspondingly drive the unlocking limit body 12 to rotate and adjust to the locking position or the unlocking position; in addition, the outer cover 17 and the unlocking limit body 12 are processed separately and then assembled together, which can facilitate processing; in addition, the outer cover 17 plays a decorative and protective role, and plays a shielding role on the unlocking limit body 12, the proximal end of the axial adjustment sleeve 14 and the proximal end of the manual adjustment shell 15 to avoid exposure, which is more beautiful.

[0054] In one embodiment, the sheath stepless adjustment mechanism 10 further includes an elastic sleeve 18 sleeved on the outside of the handle body assembly 11 .

[0055] Optionally, the elastic sleeve 18 includes but is not limited to a silicone sleeve. In this way, during the surgical operation, the elastic sleeve 18 is soft and elastic, which can improve the comfort of holding.

[0056] Specifically, the elastic sleeve 18 is sleeved on the outside of the handle body 112. Optionally, a third annular groove 118 is formed on the outer wall of the handle body 112, and the third annular groove 118 is arranged around the circumferential direction of the handle body 112. The elastic sleeve 18 is installed inside the third annular groove 118. In this way, the elastic sleeve 18 can be stably installed on the outside of the handle body 112.

[0057] Optionally, the outer wall of the elastic sleeve 18 , the outer wall of the handle body 112 , and the outer wall of the outer cover 17 are arranged flush or substantially flush.

[0058] The outer cover 17 is provided with a first alignment mark, and the outer wall of the handle body 112 is provided with a second alignment mark corresponding to the first alignment mark. In this way, the first alignment mark and the second alignment mark act as marks, and it can be judged whether the outer cover 17 is rotated to the unlocked position or the locked position, which can facilitate the doctor to perform rotation adjustment.

[0059] Specifically, there are two first alignment marks, for example, which are arranged in sequence along the circumferential direction, and one second alignment mark. The outer cover 17 is rotated so that the two first alignment marks are aligned with the second alignment mark respectively, and can be rotated to the unlocking position and the locking position respectively.

[0060] Alternatively, there is one first alignment mark and two second alignment marks, which are arranged in sequence along the circumferential direction. The outer cover 17 is rotated so that the first alignment mark is aligned with the two second alignment marks in sequence, and can be rotated to the unlocking position and the locking position respectively.

[0061] It should be noted that the rotation angle corresponding to the rotation of the outer cover 17 and the unlocking limit body 12 from the unlocking position to the locking position includes but is not limited to 30°, 45°, 60°, 90°, 120°, 135°, 150° or 180°, etc., which can be flexibly adjusted and set according to actual needs and are not limited here.

[0062] See also Figure 3 and Figure 5 In one embodiment, a third guide portion 151 in a spiral shape is formed on the inner wall of the manual adjustment shell 15, and a fourth guide portion 161 is provided on the outer wall of the movable sleeve 16. A sliding groove 145 extending parallel to the axial direction is formed on the side wall of the axial adjustment sleeve 14, and the fourth guide portion 161 can be slidably inserted into the sliding groove 145, and the fourth guide portion 161 also cooperates with the third guide portion 151. In this way, when the manual adjustment shell 15 rotates, since the fourth guide portion 161 can be slidably inserted into the sliding groove 145, the third guide portion 151 drives the fourth guide portion 161 to move in the axial direction, and the fourth guide portion 161 correspondingly drives the movable sleeve 16 to move in the axial direction.

[0063] In some embodiments, the third guide portion 151 includes but is not limited to a spiral groove. The fourth guide portion 161 is, for example, a guide ball, a guide block, a guide rod or a guide shaft. In this embodiment, the fourth guide portion 161 is specifically configured as a guide ball, and the guide ball is a steel ball. A mounting groove 162 is provided on the outer wall of the movable sleeve 16, and the guide ball can be movably arranged inside the mounting groove 162, and the guide ball also extends to the outside of the mounting groove 162.

[0064] In some embodiments, the sheath stepless adjustment mechanism 10 further includes a second elastic ring 191 mounted on the outer wall of the axial adjustment sleeve 14. The second elastic ring 191 includes but is not limited to being made of rubber material. The second elastic ring 191 abuts against the inner wall of the manual adjustment shell 15. When the manual adjustment shell 15 rotates, the second elastic ring 191 increases the rotation resistance of the manual adjustment shell 15 by rubbing against the inner wall of the manual adjustment shell 15, thereby improving the feel of the rotation operation.

[0065] In one embodiment, the sheath stepless adjustment mechanism 10 further includes a limit shell 192. The limit shell 192 is detachably mounted on the distal end of the axial adjustment sleeve, and the limit shell 192 and the distal end of the manual adjustment shell 15 abut against each other in the axial direction. A protrusion 142 is provided on the outer wall of the axial adjustment sleeve, and the protrusion 142 abuts against each other in the axial direction with the proximal end of the manual adjustment shell 15. In this way, on the one hand, the limit shell 192 and the protrusion 142 abut against the opposite ends of the manual adjustment shell 15, respectively, so as to prevent the manual adjustment shell 15 from moving in the axial direction, and thus the manual adjustment shell 15 can only rotate around the axial adjustment sleeve; on the other hand, the limit shell 192 and the axial adjustment sleeve are detachably connected, so as to facilitate the processing and assembly of parts.

[0066] Optionally, the connection method between the limiting shell 192 and the axial adjustment sleeve includes but is not limited to a threaded connection or a snap-on connection, etc., which is not limited here.

[0067] See also Figures 1 to 4 Another embodiment of the present application provides a medical grinding device, which includes the sheath stepless adjustment mechanism 10 of any of the above embodiments, and also includes a sheath assembly 20, an outer knife assembly 30, an inner knife assembly 40 and a connecting shaft 50. The sheath assembly 20 is sleeved on the outside of the outer knife assembly 30. The proximal end of the sheath assembly 20 is connected to the sheath adjustment assembly, specifically, the proximal end of the sheath assembly 20 is fixedly connected to the movable sleeve 16. The outer knife assembly 30 is fixedly connected to the handle body assembly 11, and the inner knife assembly 40 is rotatably inserted into the interior of the outer knife assembly 30, and the inner knife assembly 40 is connected to the connecting shaft 50, and the connecting shaft 50 is used to be connected to the power shaft of the motor.

[0068] During use of the above-mentioned medical grinding device, when the unlocking limit body 12 is rotated to the locking position, the unlocking limit body 12 limits the axial adjustment sleeve 14 from moving in the axial direction. At this time, the position of the sheath assembly 20 in the axial direction can be adjusted manually by operating the sheath adjustment component; when the unlocking limit body 12 is rotated to the unlocking position, the axial adjustment sleeve 14 can move in the axial direction and make the elastic member 13 adaptively deform. At this time, the position of the sheath assembly 20 in the axial direction can be adjusted manually, and the sheath assembly 20 can be adjusted steplessly in the axial direction. Specifically, when the sheath assembly 20 is subjected to force in the axial direction, the sheath assembly 20 drives the sheath adjustment component to move in the axial direction, and the sheath adjustment component correspondingly drives the axial adjustment sleeve 14 to move in the axial direction and makes the elastic member 13 adaptively deform, that is, the sheath assembly 20 is adaptively free to telescope and move axially under the elastic force of the elastic member 13, so as to realize stepless automatic position adjustment. It can be seen that the sheath assembly 20 can be adjusted in two modes, that is, the sheath 21 can be adjusted manually, and the sheath 21 can be adjusted steplessly and automatically, so that the grinding operation can be performed more efficiently and safely, and the product performance is improved.

[0069] See also Figure 1 and Figure 2 The sheath assembly 20 includes a sheath 21 and a connecting tube 22. The sheath 21 is connected to the connecting tube 22, and the connecting tube 22 is sleeved on the outside of the outer knife assembly 30. The proximal end of the connecting tube 22 is connected and fixed to the movable sleeve 16.

[0070] See also Figure 2 and Figure 3 Optionally, the outer knife assembly 30 includes an outer knife tube. The outer knife tube is inserted into the interior of the connecting tube 22 and the interior of the second support sleeve 114, and the outer knife tube is connected and fixed to the inner wall of the second support sleeve 114.

[0071] See also Figures 1 to 3 Optionally, the inner knife assembly 40 includes a grinding head 41 and an inner knife rod 42. The grinding head 41 is connected to the inner knife rod 42, and the inner knife rod 42 is connected to the connecting shaft 50.

[0072] In the description of the present application, it should be understood that if 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. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0073] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0074] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0075] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0076] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0077] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A sheath stepless adjustment mechanism connected to a sheath assembly, characterized in that: include: handle body assembly; An unlocking limiter is rotatably disposed on the handle assembly, the unlocking limiter has a locking position and an unlocking position, and the unlocking limiter can rotate between the locking position and the unlocking position; An axial adjustment sleeve, which is disposed on the handle assembly and can move in the axial direction, and the axial adjustment sleeve cooperates with the unlocking limiter; An elastic member connected to the axial adjustment sleeve; A sheath adjustment component, one end of which is connected to the axial adjustment sleeve, and the other end is connected to the sheath component; wherein, When the unlocking limit body rotates to the unlocking position, the sheath adjustment assembly drives the axial adjustment sleeve to move in the axial direction and causes the elastic member to adaptively deform so as to steplessly adjust the axial position of the sheath assembly; when the unlocking limit body rotates to the locking position, the axial adjustment sleeve is axially locked.

2. The sheath stepless adjustment mechanism according to claim 1, characterized in that: The unlocking limit body includes an unlocking limit sleeve, and the distal end of the unlocking limit sleeve is provided with a first movable recess extending in the circumferential direction and a second movable recess extending in parallel with the axial direction thereof, the first movable recess is connected with the second movable recess on a first side along the circumferential direction and is arranged corresponding to the unlocking position, and the first movable recess is arranged corresponding to the locking position on a second side along the circumferential direction; a limiting member is provided at the proximal end of the axial adjustment sleeve, and the limiting member can move along the first movable recess and can move along the second movable recess.

3. The sheath stepless adjustment mechanism according to claim 2, characterized in that: A first annular groove is formed on the handle body assembly along its circumferential direction, and a first flange is provided on the inner wall of the unlocking limit sleeve, and the first flange can be movably arranged in the first annular groove; and / or a second annular groove is formed on the inner wall of the unlocking limit sleeve along its circumferential direction, and a second flange is provided on the handle body assembly, and the second flange can be movably arranged in the second annular groove.

4. The sheath stepless adjustment mechanism according to claim 3, characterized in that: The handle body assembly includes a handle body main body, a first support sleeve and a second support sleeve; the first support sleeve is fixedly sleeved inside the handle body main body, and the distal end of the first support sleeve extends to the outside of the handle body main body; the unlocking limit sleeve is rotatably sleeved on the distal end of the first support sleeve; the second support sleeve is fixedly sleeved inside the first support sleeve, and the distal end of the second support sleeve extends to the outside of the first support sleeve, and the axial adjustment sleeve is movably arranged on the second support sleeve along the axial direction; the elastic member is a spring, and the spring is sleeved on the outside of the second support sleeve, and the opposite ends of the elastic member are respectively abutted against the proximal end of the axial adjustment sleeve and the first support sleeve.

5. The sheath stepless adjustment mechanism according to claim 1, characterized in that: The adjustment mechanism also includes an outer cover, which is arranged outside the unlocking limiter and connected to the unlocking limiter; the outer cover can also be rotatably arranged outside the proximal end of the axial adjustment sleeve and the proximal end of the sheath adjustment component.

6. The sheath stepless adjustment mechanism according to claim 5, characterized in that: The adjustment mechanism also includes an elastic sleeve sleeved on the outside of the handle body assembly; The outer cover is provided with a first alignment mark, and the outer wall of the handle body assembly is provided with a second alignment mark corresponding to the first alignment mark.

7. The sheath stepless adjustment mechanism according to claim 1, characterized in that: The sheath adjustment assembly comprises a manual adjustment shell and a movable sleeve; the manual adjustment shell is rotatably sleeved on the outside of the axial adjustment sleeve, and the manual adjustment shell is relatively fixed with the axial adjustment sleeve in the axial direction; the proximal end of the axial adjustment sleeve extends out of the manual adjustment shell and into the inside of the unlocking limiter; The movable sleeve is arranged inside the manual adjustment shell, and the movable sleeve is used to be connected with the sheath assembly. The manual adjustment shell is connected with the movable sleeve, and when the manual adjustment shell rotates, the movable sleeve can be driven to adjust the position along the axial direction; when the manual adjustment shell does not rotate, the movable sleeve is relatively fixed with the manual adjustment shell in the axial direction.

8. The sheath stepless adjustment mechanism according to claim 7, characterized in that: A third spiral guide portion is formed on the inner wall of the manual adjustment shell, a fourth guide portion is provided on the outer wall of the movable sleeve, a sliding groove extending in parallel to the axial direction is formed on the side wall of the axial adjustment sleeve, the fourth guide portion can be slidably inserted into the sliding groove, and the fourth guide portion also cooperates with the third guide portion.

9. The sheath stepless adjustment mechanism according to claim 1, characterized in that: The sheath stepless adjustment mechanism also includes a limit shell, which is detachably mounted on the distal end of the axial adjustment sleeve, and the limit shell and the distal end of the sheath adjustment component abut against each other in the axial direction. A protrusion is provided on the outer wall of the axial adjustment sleeve, and the protrusion and the proximal end of the sheath adjustment component abut against each other in the axial direction.

10. A medical grinding device, characterized in that: The medical grinding device includes the sheath stepless adjustment mechanism as described in any one of claims 1 to 9, and also includes a sheath assembly, an outer knife assembly, an inner knife assembly and a connecting shaft; the sheath assembly is sleeved on the outside of the outer knife assembly, the proximal end of the sheath assembly is connected to the sheath adjustment assembly, the outer knife assembly is fixedly connected to the handle body assembly, the inner knife assembly is rotatably inserted into the interior of the outer knife assembly, the inner knife assembly is connected to the connecting shaft, and the connecting shaft is used to be connected to the power shaft of the motor.

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