In-place sensing structure, supporting accessory for abrasive drill handle, abrasive drill handle and medical power handle

Abstract

The utility model relates to the technical field of medical instruments, in particular to an in-place sensing structure, a supporting accessory for an abrasive drill handle, the abrasive drill handle and a medical power handle, which comprises a supporting sleeve, a sensing part is arranged on the supporting sleeve or the supporting sleeve is connected with the sensing part fixed relative to the supporting sleeve; the operation sleeve is arranged outside the supporting sleeve in a matched and sleeving manner and can operably rotate around the center line of the supporting sleeve, and at least part of the inner wall of the operation sleeve faces the outer wall of the sensing part; the locking piece is used for circumferentially locking the operation sleeve at any target rotating position, and the locking piece is arranged between the operation sleeve and the sensing part; the elastic piece is used for pushing the locking piece to be automatically embedded into the corresponding induction groove when the operation sleeve rotates to any target rotation position, so that an operator inducts the in-place feeling. Therefore, the operation sleeve can feel that the operation sleeve is rotated in place, the operation complexity of the abrasive drill handle is reduced, and the safety in the operation process and the operation efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a positioning sensing structure, a support accessory for a drill handle, a drill handle, and a medical power handle. Background Technology

[0002] The power handle is used to connect and drive the cutting tool to rotate, enabling the tool to cut and process soft tissue, bone, and other human tissues. Some power handles have a support attachment at the front end for more reliable tool support during surgery. Some power handles and support attachments are equipped with a rotatable operating sleeve, which allows for functions such as adjusting the cutting position or locking the tool by rotating the operating sleeve.

[0003] However, when operators adjust the gear position by rotating the operating sleeve, it is difficult to determine whether the operation is in place. It is necessary to use methods such as pulling and rotating the support attachment or inserting and removing the tool to verify whether the operation is in place. The operation process is relatively complicated, and there are even cases where it is impossible to verify whether the operation is in place, which may affect the safety of the surgical procedure. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a positioning sensing structure, a support accessory for a drill handle, a drill handle, and a medical power handle, in order to solve the problem that the operator cannot sense whether the operating sleeve has been rotated into position in the prior art, so as to reduce the complexity of operation and improve the safety of the surgical procedure.

[0005] To achieve the above and other related objectives, this utility model provides a positioning sensing structure, comprising:

[0006] A support sleeve, wherein a sensing part is provided on the support sleeve or the support sleeve is connected to a sensing part that is fixed relative to the support sleeve; an operating sleeve, which is fitted over the support sleeve and is operable to rotate around the center line of the support sleeve, wherein at least a portion of the inner wall of the operating sleeve corresponds to the outer wall of the sensing part.

[0007] A locking element is provided between the operating sleeve and the sensing part, and is used to circumferentially lock the operating sleeve to any target rotation position.

[0008] The outer wall of the sensing part and the inner wall of the operating sleeve are provided with an elastic element mounting hole, and the other outer wall of the sensing part and the inner wall of the operating sleeve are provided with at least one sensing groove along the circumference. An elastic element is provided in the elastic element mounting hole. The elastic element is used to push the locking element to automatically embed into the corresponding sensing groove when the operating sleeve rotates to any of the target rotation positions, so as to form a positioning sensing feedback.

[0009] This utility model also provides a support accessory for a drill handle, including the aforementioned positioning sensing structure. The extension length of the support accessory is adjustable and has at least two extension positions, each of which corresponds to a target rotation position. The support sleeve is used to connect to the front end of the drill handle. The support accessory further includes:

[0010] A support tube is fitted inside the support sleeve, the support tube extending beyond the front end of the support sleeve and capable of axial movement relative to the support sleeve.

[0011] A transmission structure is provided between the support tube and the operating sleeve. The transmission structure is used to convert the rotational motion of the operating sleeve into the axial motion of the support tube, so that when the operating sleeve rotates relative to the support sleeve to any of the target rotation positions, the length of the front end of the support tube protruding from the support sleeve corresponds to the corresponding length extension position.

[0012] Optionally, the support accessory further includes a slip ring that forms the sensing part, the slip ring being at least partially fitted inside the operating sleeve and detachably fixed relative to the support sleeve.

[0013] Optionally, an anti-rotation structure is provided between the slip ring and the support sleeve. The anti-rotation structure includes at least one pair of matching limiting parts and limiting grooves. One of the limiting parts and the limiting grooves is located on the outer wall of the slip ring, and the other of the limiting parts and the limiting grooves is located on the inner wall of the support sleeve. The limiting parts are correspondingly embedded in the corresponding limiting grooves.

[0014] Optionally, the limiting part is a limiting protrusion provided on the outer wall of the slip ring, the elastic element mounting hole is provided on the limiting protrusion, the limiting groove is provided on the support sleeve, and the limiting protrusion passes through the support sleeve through the limiting groove.

[0015] Optionally, the inner wall of the operating sleeve is provided with a spiral groove, and the outer wall of the support tube is provided with a guide portion that penetrates the support sleeve and is fitted into the spiral groove. An axial guide structure is provided between the support sleeve and the support tube. When the operating sleeve rotates relative to the support sleeve, the guide portion moves in the spiral groove along the extension direction of the spiral groove, thereby driving the support tube to move axially along the support sleeve.

[0016] Optionally, the limiting groove extends along the axial direction of the support sleeve, and the guide portion and the limiting groove each constitute part of the axial guide structure. The guide portion is fitted inside the limiting groove and passes through the limiting groove radially, and the guide portion can move along the extension direction of the limiting groove.

[0017] Optionally, a retaining ring is fitted on the outer wall of the support sleeve and fixed axially relative to the support sleeve. A first axial limiting surface is provided inside the support sleeve, and a second axial limiting surface is provided inside the retaining ring. The first axial limiting surface blocks one end of the slip ring axially, and the second axial limiting surface blocks the other end of the slip ring axially.

[0018] Optionally, a retaining ring is fitted on the outer wall of the support sleeve and fixed axially relative to the support sleeve. A third axial limiting surface is provided on the outer wall of the support sleeve. The retaining ring blocks one end of the operating sleeve along the axial direction, and the third axial limiting surface blocks the other end of the operating sleeve along the axial direction.

[0019] This utility model also provides a drill handle, adapted to a cutting tool, comprising:

[0020] A handle body, which is used to connect with the tool drive and provide rotational power to the tool;

[0021] The support accessory is the aforementioned support accessory for a drill handle, which is used to connect to the front end of the handle body and has a support channel through which the cutting tool passes.

[0022] This utility model also provides a medical power handle, including the above-mentioned positioning sensing structure.

[0023] As described above, in the positioning sensing structure of this utility model, a sensing part is provided on the support sleeve, or a sensing part fixed relative to the support sleeve is connected to the support sleeve. The operating sleeve is fitted outside the support sleeve and can be operably rotated around the center line of the support sleeve. At least part of the inner wall of the operating sleeve coincides with the outer wall of the sensing part in the axial direction. A locking member can circumferentially lock the operating sleeve to any target rotation position, and the locking member is located between the operating sleeve and the sensing part. One of the outer wall of the sensing part and the inner wall of the operating sleeve has an elastic element mounting hole, and the other has at least one sensing groove circumferentially. By setting an elastic element in the elastic element mounting hole, the elastic element can push the locking member to automatically embed into the corresponding sensing groove when the operating sleeve rotates to any target rotation position, so that the operator can form positioning sensing feedback. Thus, the operating sleeve can feel the rotation to be in place without the need for other methods to verify whether it is in place, reducing the complexity of operation. Furthermore, it also helps to avoid the situation where surgery is performed before the gear is properly adjusted, improving the safety and efficiency of the surgical procedure. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the operating sleeve structure according to an embodiment of the present utility model;

[0026] Figure 3 This is a perspective view of the operating sleeve according to an embodiment of the present utility model;

[0027] Figure 4 This is a perspective view of the slip ring according to an embodiment of the present utility model;

[0028] Figure 5 This is a perspective view of the support sleeve according to an embodiment of the present utility model;

[0029] Figure 6 This is a schematic diagram of the drill handle structure according to an embodiment of the present utility model.

[0030] Part Number Explanation

[0031] 1-Support tube; 2-Support sleeve; 21-Limiting groove; 22-Third axial limiting surface; 23-First axial limiting surface; 3-Operating sleeve; 31-Helical groove; 32-Sensing groove; 33-Guide part; 4-Sticking ring; 5-Slip ring; 51-Limiting part; 511-Elastic element mounting hole; 52-Locking element; 53-Second axial limiting surface; 54-Elastic element; 6-Cutting tool; 7-Support accessory; 8-Handle body. Detailed Implementation

[0032] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0033] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show components related to this utility model and are not drawn according to the actual number, shape, and size of the components in implementation. In actual implementation, the form, quantity, and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex. The structures, proportions, sizes, etc., shown in the accompanying drawings are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0034] Some power handles and support accessories are equipped with a rotatable operating sleeve, which allows for functions such as gear adjustment or tool locking by rotating the sleeve. However, when adjusting the gear or locking the tool by rotating the operating sleeve, the operator may find it difficult to determine whether the operation is complete. Verification requires pulling or rotating the support accessory or inserting or removing the tool, making the process complex and sometimes impossible to verify, potentially affecting the safety of the surgical procedure. The purpose of this application is to solve the problem of not being able to verify whether the operation is complete. The following embodiments will describe in detail how to solve this problem.

[0035] It should be emphasized that the "some power handles and support accessories are equipped with rotatable operating sleeves, and the gear adjustment or tool locking functions are realized by rotating the operating sleeves" mentioned in the background art is only for illustrating the purpose of this application and does not indicate that this method belongs to the prior art.

[0036] In the description of the following embodiments, "axial direction" refers to the axial direction of the handle body 8 of the drill handle, which is also the axial direction of the entire drill handle; in the description of the following embodiments, the directional terms "front" and "back" are relative directions, "front" refers to the direction along the axial direction that is closer to the drill bit of the tool 6, and "back" refers to the direction along the axial direction that is farther away from the drill bit of the tool 6.

[0037] Please see Figure 1 This embodiment provides a position sensing structure, including:

[0038] Support sleeve 2, the support sleeve 2 is provided with a sensing part or the support sleeve 2 is connected to a sensing part that is fixed relative to the support sleeve 2;

[0039] The operating sleeve 3 is fitted outside the support sleeve 2 and can be operably rotated around the center line of the support sleeve 2. At least part of the inner wall of the operating sleeve 3 corresponds to the outer wall of the sensing part.

[0040] Locking member 52 is provided between the operating sleeve 3 and the sensing part, and is used to lock the operating sleeve 3 circumferentially at any target rotation position.

[0041] The outer wall of the sensing part and the inner wall of the operating sleeve 3 are provided with an elastic element mounting hole 511, and the other outer wall of the sensing part and the inner wall of the operating sleeve 3 are provided with at least one sensing groove 32 along the circumferential direction. An elastic element 54 is provided in the elastic element mounting hole 511. The elastic element 54 is used to push the locking element 52 to automatically embed into the corresponding sensing groove 32 when the operating sleeve 3 rotates to any target rotation position, so as to form a positioning sensing feedback.

[0042] Specifically, the sensing element can be part of the support sleeve 2, or it can be a component directly or indirectly connected to the support sleeve 2. Both the support sleeve 2 and the operating sleeve 3 extend along their respective axial directions, with the operating sleeve 3 fitting over the outer wall of the support sleeve 2. The operating sleeve 3 is operably rotatable about the centerline of the support sleeve 2, with the centerline of the support sleeve 2 coinciding with the axis of the operating sleeve 3, and at least a portion of the inner wall of the operating sleeve 3 coinciding axially with the outer wall of the sensing element.

[0043] The locking member 52 is disposed between the inner wall of the operating sleeve 3 and the outer wall of the sensing part. The locking member 52 can lock the operating sleeve 3 circumferentially at any target rotation position. In this embodiment, the target rotation position can be a corresponding gear position. The number of gear positions is at least one along the circumference. By adjusting the gear position, the length of the extended blade 6 can be changed accordingly. Alternatively, the target rotation position can be the position of locking the blade 6 or releasing the blade 6. Locking or releasing the blade 6 can be achieved at different target rotation positions.

[0044] An elastic element 54 is provided inside the elastic element mounting hole 511. The elastic element 54 can be a spring, rubber pad, or other elastic component that can support and push the locking element 52 radially outward after being compressed. The locking element 52 can be spherical or cylindrical in shape. When the elastic element 54 is a spring, the inner diameter of the spring is smaller than the outer diameter of the locking element 52 to prevent the locking element 52 from falling into the spring.

[0045] Each target rotation position corresponds to a sensing groove 32, and the elastic element 54 is located within the elastic element mounting hole 511. When the locking element 52 is outside the sensing groove 32, the elastic element 54 is in a compressed state. When the operating sleeve 3 rotates to any target rotation position, the locking element 52 is pushed into the corresponding sensing groove 32 by the elastic force of the elastic element 54. Under the action of the elastic force of the elastic element 54, the locking element 52 is radially pressed against the bottom wall of the sensing groove 32, so that the operating sleeve 3 is in a circumferentially locked state before the next rotation by the operator. It should be noted that the "positioning feedback" described above and below can be a positioning sound or a positioning touch. The sound or touch that the operator can hear or feel at the moment when the locking element 52 is squeezed into the sensing groove 32 by the elastic element 54 is considered "positioning feedback".

[0046] In this embodiment, the support sleeve 2 is provided with a sensing part or the support sleeve 2 is connected to a sensing part that is fixed relative to the support sleeve 2. The operating sleeve 3 is fitted around the support sleeve 2 and can be operably rotated around the center line of the support sleeve 2. At least part of the inner wall of the operating sleeve 3 coincides with the outer wall of the sensing part in the axial direction. The locking member 52 can lock the operating sleeve 3 circumferentially at any target rotation position. The locking member 52 is disposed between the operating sleeve 3 and the sensing part. One of the outer wall of the sensing part and the inner wall of the operating sleeve 3 is provided with an elastic element mounting hole 511, and the other is provided with at least one sensing groove 32 along the circumferential direction. By providing an elastic element 54 in the elastic element mounting hole 511, the elastic element 54 can push the locking member 52 to automatically embed into the corresponding sensing groove 32 when the operating sleeve 3 rotates to any target rotation position, so as to form a positioning sensing feedback. Thus, the operating sleeve 3 can feel the rotation to be in place without the need for other methods to verify whether it is in place, reducing the complexity of operation. In addition, it is also beneficial to avoid the situation of performing surgery when the gear is not adjusted to the correct position, thereby improving the safety and efficiency of the operation.

[0047] This embodiment also provides a support attachment 7 for a drill handle. The support attachment 7 is used to connect to the front end of the handle body 8 of the drill handle, and the support attachment 7 includes the aforementioned positioning sensing structure. Figure 1 and Figure 5 As shown, the extension length of the support accessory 7 is adjustable and has at least two extension length positions, each corresponding to a target rotation position. The support sleeve 2 is used to connect to the front end of the handle body 8 of the drill handle. The support accessory 7 also includes a support tube 1 that is fitted inside the support sleeve 2. The support tube 1 extends out of the front end of the support sleeve 2 and can move axially relative to the support sleeve 2. A transmission structure is provided between the support tube 1 and the operating sleeve 3. The transmission structure is used to convert the rotational motion of the operating sleeve 3 into the axial motion of the support tube 1, so that when the operating sleeve 3 rotates relative to the support sleeve 2 to any target rotation position, the length of the front end of the support tube 1 protruding from the support sleeve 2 corresponds to the corresponding extension length position.

[0048] Regarding the aforementioned "support sleeve 2 is used to connect to the front end of the handle body 8 of the drill handle", the support sleeve 2 can be connected to the front end of the handle body 8 of the drill handle in a way that is not directly detachable, or it can be... Figure 6 In this manner, the support sleeve 2 is detachably connected to the front end of the handle body 8 of the drill handle.

[0049] Specifically, the support tube 1 is fitted inside the support sleeve 2, and the support tube 1 extends through it axially. The front end of the support tube 1 extends beyond the front end of the support sleeve 2 and can move axially relative to the support sleeve 2. The support tube 1 and the support sleeve 2 are circumferentially fixed, meaning that the support tube 1 cannot rotate relative to the support sleeve 2 along its own axis. A transmission structure is provided between the outer wall of the support tube 1 and the inner wall of the operating sleeve 3. The transmission structure can convert the rotational motion of the operating sleeve 3 into the axial motion of the support tube 1. Thus, when the operating sleeve 3 is rotated, the length of the front end of the support tube 1 extending beyond the front end of the support sleeve 2 changes accordingly, causing the length of the support tube 1 covering the tool 6 to change accordingly, corresponding to different length extension positions. At the same time, since each length extension position corresponds to a target rotation position, when each length extension position is adjusted, the locking component will engage with the corresponding sensing groove to form a positioning feedback, allowing the operator to confirm that the adjustment is in place.

[0050] In one implementation, such as Figure 1 and Figure 4 As shown, the support accessory 7 also includes a slip ring 5 that forms the sensing part. The slip ring 5 is at least partially fitted inside the operating sleeve 3 and is detachably fixed relative to the support sleeve 2.

[0051] Specifically, the slip ring 5 extends along its axial direction and can be entirely or partially fitted inside the operating sleeve 3. The slip ring 5 is detachably fixed relative to the support sleeve 2, meaning it cannot move axially, radially, or rotate circumferentially relative to the support sleeve 2. This detachability of the slip ring 5 from the support sleeve 2 facilitates its installation and removal, allowing for independent disassembly and replacement of the slip ring 5 without removing the support sleeve 2, thus enabling maintenance of the position sensing structure.

[0052] In one implementation, such as Figure 1 , Figure 4 and Figure 5 As shown, an anti-rotation structure is provided between the slip ring 5 and the support sleeve 2. The anti-rotation structure includes at least one pair of matching limiting parts 51 and limiting grooves 21. One of the limiting parts 51 and the limiting grooves 21 is provided on the outer wall of the slip ring 5, and the other of the limiting parts 51 and the limiting grooves 21 is provided on the inner wall of the support sleeve 2. The limiting parts 51 are correspondingly embedded in the corresponding limiting grooves 21.

[0053] Specifically, an anti-rotation structure is provided between the outer wall of the slip ring 5 and the inner wall of the support sleeve 2 to prevent the slip ring 5 from rotating relative to the support sleeve 2. The anti-rotation structure includes a limiting part 51 and a limiting groove 21. The limiting part 51 is fitted into the limiting groove 21 to prevent relative rotation between the slip ring 5 and the support sleeve 2. Multiple sets of limiting parts 51 and limiting grooves 21 can be used to improve the anti-rotation effect.

[0054] In one implementation, such as Figure 4 and Figure 5 As shown, the limiting part 51 is a limiting protrusion provided on the outer wall of the slip ring 5, the elastic element mounting hole 511 is provided on the limiting protrusion, the limiting groove 21 is provided on the support sleeve 2, and the limiting protrusion passes through the support sleeve 2 through the limiting groove 21.

[0055] Specifically, the outer wall of the slip ring 5 is provided with a limiting protrusion extending axially, forming a limiting part 51. There can be two limiting protrusions arranged opposite each other circumferentially on the slip ring 5. An elastic element mounting hole 511 is provided on the limiting protrusion and extends radially along the slip ring 5. A limiting groove 21 is provided on the support sleeve 2, penetrating the thickness direction of the support sleeve 2 and extending axially along the support sleeve 2. The limiting protrusion can pass through and protrude from the limiting groove 21. The two sides of the limiting protrusion along the axial direction of the slip ring 5 abut against the two side walls of the limiting groove 21 respectively, thereby limiting the circumferential movement of the slip ring 5 and preventing circumferential rotation.

[0056] In one implementation, such as Figures 1 to 3 As shown, the inner wall of the operating sleeve 3 is provided with a spiral groove 31, and the outer wall of the support tube 1 is provided with a guide part 33 that penetrates the support sleeve 2 and is fitted into the spiral groove 31. An axial guide structure is provided between the support sleeve 2 and the support tube 1. When the operating sleeve 3 rotates relative to the support sleeve 2, the guide part 33 moves in the spiral groove 31 along the extension direction of the spiral groove 31, so as to drive the support tube 1 to move along the axial direction of the support sleeve 2.

[0057] The guide portion 33 penetrates the thickness direction of the support tube 1 and extends into the spiral groove 31, moving within it. The operating sleeve 3 and the support sleeve 2 cannot move relative to each other axially. Rotating the operating sleeve 3 causes the guide portion 33 to move within the spiral groove 31 along its extension direction, thereby driving the support tube 1 to move axially along the support sleeve 2. This structure is simple, offers high operational stability, and allows adjustment of the length of the support tube 1 extending beyond the support sleeve 2 by rotating the operating sleeve 3, thus adjusting the exposed length of the tool 6. It is convenient to use.

[0058] The guide portion 33 can be a protruding post protruding from the outer wall of the support tube 1, or the guide portion 33 can be a ball rolling in a receiving hole on the outer wall of the support tube 1.

[0059] In one implementation, such as Figure 1 and Figure 5 As shown, the limiting groove 21 extends along the axial direction of the support sleeve 2. The guide part 33 and the limiting groove 21 each constitute part of the axial guiding structure. The guide part 33 is provided in the limiting groove 21 and penetrates the limiting groove 21 radially. The guide part 33 can move along the extension direction of the limiting groove 21.

[0060] For ease of understanding, the axial guide structure can be considered to include a guide portion 33 and a limiting groove 21, with the limiting groove 21 extending along the axial direction of the support sleeve 2. The guide portion 33 can be fitted into the limiting groove 21 and protrude radially outward from the limiting groove 21, and can move along the extending direction of the limiting groove 21.

[0061] In this structure, the guide part 33 cooperates with both the limiting groove 21 and the spiral groove 31, and has both axial and circumferential guiding functions, which helps to make the internal structure of the entire support accessory 7 simpler and more compact. The limiting groove 21 guides the support tube 1 with the guide part 33, and also plays an axial limiting role for the slip ring, which also helps to make the internal structure of the entire support accessory 7 simpler and more compact.

[0062] In the above method, the guide part 33 and the limiting groove 21 each constitute a part of the axial guide structure, achieving the effect of simplifying the structure. Of course, in actual implementation, this axial guide structure can also be constructed by other guide grooves and guide components, for example, Figure 5 The limiting groove 21 can be replaced by any hollow structure, as long as the guide part 33 can pass through it, and the guide groove can be formed on the support tube 1 or the support sleeve 2. Figure 5 The middle limiting groove 21 is located at any position offset in the circumferential direction, and a guide is provided on the support sleeve 2 or support tube 1 at the position corresponding to the guide groove.

[0063] In one implementation, such as Figure 1 As shown, a retaining ring 4 is sleeved on the outer wall of the support sleeve 2 and fixed axially relative to the support sleeve 2. A first axial limiting surface 23 is provided inside the support sleeve 2, and a second axial limiting surface 53 is provided inside the retaining ring 4. The first axial limiting surface 23 blocks one end of the slip ring 5 axially, and the second axial limiting surface 53 blocks the other end of the slip ring 5 axially.

[0064] The inner wall of the support sleeve 2 is provided with a first axial limiting surface 23, and the inner wall of the retaining ring 4 is provided with a second axial limiting surface 53. The first axial limiting surface 23 is located behind the second axial limiting surface 53. The second axial limiting surface 53 blocks the front end of the slip ring 5 axially, and the first axial limiting surface 23 blocks the rear end of the slip ring 5 axially. The first axial limiting surface 23 and the second axial limiting surface 53 can axially limit the slip ring 5 and prevent the slip ring 5 from moving axially.

[0065] The first axial limiting surface 23 can be a stepped structure provided on the inner wall of the support sleeve 2, and the second axial limiting surface 53 can be a stepped structure provided on the inner wall of the retaining ring 4.

[0066] In one implementation, such as Figure 1 As shown, a retaining ring 4 is sleeved on the outer wall of the support sleeve 2 and fixed axially relative to the support sleeve 2. A third axial limiting surface 22 is provided on the outer wall of the support sleeve 2. The retaining ring 4 blocks one end of the operating sleeve 3 along the axial direction, and the third axial limiting surface 22 blocks the other end of the operating sleeve 3 along the axial direction.

[0067] A third axial limiting surface 22 is provided on the outer wall of the support sleeve 2. The retaining ring 4 blocks the front end of the operating sleeve 3 along the axial direction, and the third axial limiting surface 22 blocks the rear end of the operating sleeve 3 along the axial direction to axially limit the operating sleeve 3. The rear end face of the retaining ring 4 blocks the front end of the operating sleeve 3 along the axial direction, and the third axial limiting can be a stepped structure.

[0068] This embodiment also provides a drill handle, such as Figure 6 As shown, it is compatible with tool 6 and includes:

[0069] Handle body 8, the handle body 8 is used for transmission connection with the tool 6;

[0070] Support accessory 7, which is the aforementioned support accessory 7 for the drill handle, is used to connect to the front end of the handle body 8, and the support accessory 7 has a support channel through which the cutting tool 6 passes.

[0071] Specifically, the tail end of the cutter 6 passes through the support attachment 7 and the handle body 8 in sequence, and is directly or indirectly connected to the drive motor inside the handle body 8. The support attachment 7 can be non-detachably connected to the handle body 8, or it can be detachably connected to the handle body 8.

[0072] This embodiment also provides a medical power handle, including the aforementioned position sensing structure. In other words, the aforementioned position sensing structure can be applied to a medical power handle. For example, if the locking process of the tool 6 is achieved by rotating the operating sleeve 3, this position sensing structure can be applied to the medical power handle to generate position sensing feedback when the tool 6 is in the locking process.

[0073] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A positioning sensing structure, characterized in that, include: A support sleeve, wherein the support sleeve is provided with a sensing part or the support sleeve is connected to a sensing part that is fixed relative to the support sleeve; An operating sleeve is fitted over the support sleeve and is operably rotatable about the center line of the support sleeve, with at least a portion of the inner wall of the operating sleeve corresponding to the outer wall of the sensing part. A locking element is provided between the operating sleeve and the sensing part, and is used to circumferentially lock the operating sleeve to any target rotation position. The outer wall of the sensing part and the inner wall of the operating sleeve are provided with an elastic element mounting hole, and the other outer wall of the sensing part and the inner wall of the operating sleeve are provided with at least one sensing groove along the circumference. An elastic element is provided in the elastic element mounting hole. The elastic element is used to push the locking element to automatically embed into the corresponding sensing groove when the operating sleeve rotates to any of the target rotation positions, so as to form a positioning sensing feedback.

2. A support accessory for a drill handle, characterized in that, Including the positioning sensing structure as described in claim 1, the extension length of the support accessory is adjustable and has at least two extension length positions, each of the extension length positions corresponding to a target rotation position, the support sleeve is used to connect to the front end of the drill handle, and the support accessory further includes: A support tube is fitted inside the support sleeve, the support tube extending beyond the front end of the support sleeve and capable of axial movement relative to the support sleeve. A transmission structure is provided between the support tube and the operating sleeve. The transmission structure is used to convert the rotational motion of the operating sleeve into the axial motion of the support tube, so that when the operating sleeve rotates relative to the support sleeve to any of the target rotation positions, the length of the front end of the support tube protruding from the support sleeve corresponds to the corresponding length extension position.

3. The support accessory for a drill handle according to claim 2, characterized in that, The support accessory also includes a slip ring that forms the sensing part, the slip ring being at least partially fitted inside the operating sleeve and detachably fixed relative to the support sleeve.

4. The support accessory for a drill handle according to claim 3, characterized in that, An anti-rotation structure is provided between the slip ring and the support sleeve. The anti-rotation structure includes at least one pair of matching limiting parts and limiting grooves. One of the limiting parts and the limiting grooves is located on the outer wall of the slip ring, and the other of the limiting parts and the limiting grooves is located on the inner wall of the support sleeve. The limiting parts are correspondingly embedded in the corresponding limiting grooves.

5. The support accessory for a drill handle according to claim 4, characterized in that, The limiting part is a limiting protrusion provided on the outer wall of the slip ring, the elastic element mounting hole is provided on the limiting protrusion, the limiting groove is provided on the support sleeve, and the limiting protrusion passes through the support sleeve through the limiting groove.

6. The support accessory for a drill handle according to claim 5, characterized in that, The inner wall of the operating sleeve is provided with a spiral groove, and the outer wall of the support tube is provided with a guide part that penetrates the support sleeve and is fitted into the spiral groove. An axial guide structure is provided between the support sleeve and the support tube. When the operating sleeve rotates relative to the support sleeve, the guide part moves in the spiral groove along the extension direction of the spiral groove, so as to drive the support tube to move axially along the support sleeve.

7. The support accessory for a drill handle according to claim 6, characterized in that, The limiting groove extends along the axial direction of the support sleeve. The guide part and the limiting groove each constitute part of the axial guide structure. The guide part is fitted in the limiting groove and passes through the limiting groove radially. The guide part can move along the extension direction of the limiting groove.

8. The support accessory for a grinding drill handle according to claim 3, characterized in that, A retaining ring is fitted on the outer wall of the support sleeve and fixed axially relative to the support sleeve. A first axial limiting surface is provided inside the support sleeve, and a second axial limiting surface is provided inside the retaining ring. The first axial limiting surface blocks one end of the slip ring axially, and the second axial limiting surface blocks the other end of the slip ring axially.

9. The support accessory for a drill handle according to claim 2, characterized in that, A retaining ring is fitted on the outer wall of the support sleeve and fixed axially relative to the support sleeve. A third axial limiting surface is provided on the outer wall of the support sleeve. The retaining ring blocks one end of the operating sleeve along the axial direction, and the third axial limiting surface blocks the other end of the operating sleeve along the axial direction.

10. A drill handle, adapted to a cutting tool, characterized in that, include: A handle body, the handle body being used for connection with the tool drive; A support attachment, wherein the support attachment is the support attachment for a drill handle as described in any one of claims 2 to 9, the support attachment being used to connect to the front end of the handle body, and the support attachment having a support channel through which the cutting tool passes.

11. A medical powered handpiece, characterized in that, Includes the position sensing structure as described in claim 1.

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