Medical abrasive drill handle, supporting accessory and medical abrasive drill device

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a medical abrasive drill handle, a supporting accessory and a medical abrasive drill device.The medical abrasive drill handle comprises an installation sleeve which is used for abutting against the supporting accessory after being connected with the supporting accessory in an inserted mode, and the installation sleeve is provided with a first circumferential limiting part; the first circumferential limiting part is used for being matched with a second circumferential limiting part of the supporting accessory to circumferentially limit the supporting accessory; the lock sleeve is arranged outside the mounting sleeve in a sleeving manner and can operably rotate around the axial direction of the mounting sleeve, and a first axial limiting part is arranged at the front end of the lock sleeve; when the lock sleeve is located at the locking position to lock the supporting accessory, the first axial limiting part and the second axial limiting part of the supporting accessory are at least partially overlapped in the circumferential direction and face each other, so that the supporting accessory is prevented from being separated from the mounting sleeve; when the lock sleeve is located at the non-locking position, the first axial limiting part and the second axial limiting part are staggered in the circumferential direction so that the supporting accessory can be disengaged from or connected with the installation sleeve in an inserted mode in the axial direction. According to the utility model, reliable connection between the supporting accessory and the medical abrasive drill handle can be ensured, and the safety is high.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a medical drill handle, support accessories and medical drill device. Background Technology

[0002] The medical drill is an important medical device widely used in orthopedics, dentistry, neurosurgery and other medical fields. The handle of the medical drill in this device is used to connect with the corresponding medical drill during surgery, drive the medical drill to generate rotational power, and act on human tissue to remove the tissue. It mainly includes operations such as cutting, grinding, drilling and repairing bone tissue.

[0003] For slender medical drills, a support attachment needs to be connected to the front end of the drill handle during surgery to assist in supporting the drill when it is inserted into the handle, thus ensuring reliable operation.

[0004] However, the existing locking structure between the support attachment and the handle may wear out after long-term use, posing a risk of the support attachment coming off and causing a safety accident. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a medical drill handle, a support accessory, and a medical drill device to solve the problem that the locking structure between the support accessory and the drill handle in the prior art may come loose due to wear after long-term use, thereby improving safety.

[0006] To achieve the above and other related objectives, the technical solution of this utility model is as follows:

[0007] A medical drill handle is detachably connected to a support accessory for supporting the medical drill. The medical drill handle includes:

[0008] The mounting sleeve is used to abut against the support accessory after being inserted. The mounting sleeve is provided with a first circumferential limiting part, which is used to cooperate with the second circumferential limiting part of the support accessory to circumferentially limit the support accessory.

[0009] A locking sleeve, fitted over the mounting sleeve and operably rotatable about the axial direction of the mounting sleeve, has a first axial limiting portion at its front end. The rotational positions of the locking sleeve include a locked position and a non-locked position.

[0010] When the locking sleeve is in the locked position and locks the support accessory, the first axial limiting portion and the second axial limiting portion of the support accessory overlap at least partially in the circumferential direction and face each other to prevent the support accessory from detaching from the mounting sleeve; when the locking sleeve is in the unlocked position, the first axial limiting portion and the second axial limiting portion are offset in the circumferential direction so that the support accessory can axially detach from or insert into the mounting sleeve.

[0011] Optionally, the locking sleeve is provided with a first insertion cavity for inserting the support accessory, and the first axial limiting part protrudes from the cavity wall of the first insertion cavity to be adapted to the second axial limiting part protruding from the outer wall of the support accessory;

[0012] Alternatively, the locking sleeve is used to insert into the second insertion cavity of the support accessory, and the first axial limiting portion protrudes from the outer wall of the locking sleeve to adapt to the second axial limiting portion protruding from the cavity wall of the second insertion cavity.

[0013] Optionally, the locking sleeve and the mounting sleeve have an installation gap for inserting a support accessory, the installation gap having a forward-facing opening, the first circumferential limiting portion being disposed on the outer wall of the mounting sleeve, and the first axial limiting portion being disposed on the inner wall of the locking sleeve.

[0014] Based on the same concept, this utility model also provides a support accessory for connecting a medical drill handle. The medical drill handle includes a mounting sleeve and a locking sleeve. The locking sleeve is fitted outside the mounting sleeve and can rotate about its own axis. The rotation position of the locking sleeve includes a locked position and a non-locked position. The support accessory includes:

[0015] A support sleeve is used to abut against the mounting sleeve after being inserted. The support sleeve is provided with a second circumferential limiting part, which is used to cooperate with the first circumferential limiting part of the mounting sleeve to circumferentially limit the support sleeve.

[0016] The rear end of the support sleeve is provided with a second axial limiting part, which is used to cooperate with the first axial limiting part of the locking sleeve.

[0017] When the locking sleeve is in the locked position and locks the support sleeve, the first axial limiting portion and the second axial limiting portion overlap at least partially in the circumferential direction and face each other to prevent the support sleeve from detaching from the mounting sleeve; when the locking sleeve is in the unlocked position, the first axial limiting portion and the second axial limiting portion are offset in the circumferential direction so that the support sleeve can axially detach from or insert into the mounting sleeve.

[0018] Optionally, the support sleeve is used to insert into the first insertion cavity of the lock sleeve, and the second axial limiting part protrudes from the outer wall of the support sleeve to adapt to the first axial limiting part protruding from the cavity wall of the first insertion cavity;

[0019] Alternatively, the support sleeve may have a second insertion cavity for inserting the lock sleeve, and the second axial limiting portion protrudes from the cavity wall of the second insertion cavity to be adapted to the first axial limiting portion protruding from the outer wall of the lock sleeve.

[0020] Optionally, the second circumferential limiting portion is provided on the inner wall of the support sleeve, and the second axial limiting portion is provided on the outer wall of the support sleeve.

[0021] Based on the same concept, this utility model also provides a medical grinding drill device, including the medical grinding drill handle as described above and a support accessory adapted to the medical grinding drill handle; or, including the support accessory as described above and a medical grinding drill handle adapted to the support accessory.

[0022] Optionally, the support accessory includes a support sleeve, a first circumferential limiting portion is provided on the outer wall of the mounting sleeve, a second circumferential limiting portion is provided on the inner wall of the support sleeve, and a first step portion is provided inside the support sleeve for axially abutting against the mounting sleeve.

[0023] Alternatively, the support accessory may include a support sleeve, with a first circumferential limiting portion disposed on the inner wall of the mounting sleeve, a second circumferential limiting portion disposed on the outer wall of the support sleeve, and a second step portion disposed inside the mounting sleeve for axially abutting against the support sleeve.

[0024] Based on the same concept, this utility model also provides a medical grinding drill device, including the medical grinding drill handle as described above and the support accessory as described above, wherein the medical grinding drill handle and the support accessory are adapted to each other.

[0025] In the first axial limiting part and the second axial limiting part, one of the limiting parts is an annular limiting part with an insertion notch. The insertion notch extends from one side of the annular limiting part to the other side of the annular limiting part in the axial direction. When the locking sleeve is in the non-locking position, the other limiting part can pass through the insertion notch in the axial direction so that the medical drill handle and the support accessory can be disengaged or inserted.

[0026] Optionally, the second axial limiting part is the annular limiting part, the width of the insertion notch gradually decreases along the direction in which the locking sleeve separates from the support accessory, and the minimum width of the insertion notch is adapted to the width of the first axial limiting part.

[0027] Alternatively, the first axial limiting part is the annular limiting part, the width of the insertion notch gradually decreases along the direction in which the support accessory separates from the locking sleeve, and the minimum width of the insertion notch is adapted to the width of the second axial limiting part.

[0028] As described above, the present invention has the following beneficial effects:

[0029] The support accessory can be locked and unlocked by rotating the locking sleeve. When the locking sleeve is rotated to the locked position to lock the support accessory, the first axial limiting part on the locking sleeve and the second axial limiting part on the support accessory overlap at least partially in the circumferential direction and are opposite to each other, so as to prevent the support accessory from detaching from the mounting sleeve. Regardless of whether the first axial limiting part and the second axial limiting part are worn, the support accessory cannot be directly detached from the medical drill handle along the axial direction, which ensures the reliable connection between the support accessory and the medical drill handle, avoids the risk of the support accessory falling off the medical handle, and improves safety. Attached Figure Description

[0030] Figure 1 This is an exploded structural diagram of the medical drill handle and support accessories according to an embodiment of the present utility model;

[0031] Figure 2 This is a schematic diagram of the assembly structure of the support accessory and the medical drill handle according to an embodiment of the present utility model;

[0032] Figure 3 This is a schematic diagram of the assembly structure of the support sleeve and the medical drill handle in an embodiment of this utility model;

[0033] Figure 4 This is a cross-sectional view of the assembly of the support sleeve and the medical drill handle in an embodiment of this utility model;

[0034] Figure 5 This is a partial structural cross-sectional view of the medical drill handle in an embodiment of this utility model;

[0035] Figure 6 This is a schematic diagram of the structure of the mounting sleeve in an embodiment of this utility model;

[0036] Figure 7 This is a front view of the mounting sleeve in an embodiment of this utility model;

[0037] Figure 8 This is a schematic diagram of the lock sleeve in an embodiment of the present utility model;

[0038] Figure 9 This is a cross-sectional view of the lock sleeve in an embodiment of this utility model;

[0039] Figure 10 This is a schematic diagram of the support sleeve in an embodiment of the present utility model;

[0040] Figure 11 This is a front view of the support sleeve in an embodiment of this utility model;

[0041] Figure 12 This is a cross-sectional view (AA) of the support sleeve in an embodiment of this utility model.

[0042] Explanation of reference numerals in the attached figures

[0043] 100-Medical drill handle;

[0044] 11-Mounting sleeve; 111-First circumferential limiting part;

[0045] 12-Locking sleeve; 121-First axial limiting part;

[0046] 13-Locking threaded sleeve; 14-Connecting threaded sleeve;

[0047] 200 - Support accessory; 210 - Support sleeve; 211 - Second circumferential limiting part; 212 - Second axial limiting part; 212a - Insertion notch; 213 - First step part. Detailed Implementation

[0048] The following specific embodiments 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.

[0049] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely 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 within the scope of implementation of this utility model.

[0050] Existing medical drill handles typically have a channel at the front end for inserting a support attachment. The inner wall of this channel has openings for a steel ball to enter and exit. When the support attachment is inserted, the steel ball is pushed into a locking groove on the outer wall of the support attachment by the elastic force of a corresponding elastic element, thus locking the support attachment in place. However, this method is prone to unreliable locking after the steel ball wears down or the elastic element fails due to fatigue, posing a risk of the support attachment dislodging. This application aims to solve this problem by improving the reliability of the locking connection between the support attachment and the handle, thereby enhancing safety.

[0051] In the description of the following embodiments, "axial direction" refers to the axial direction of the entire medical drill handle; in the description of the following embodiments, the directional terms "distal end" and "proximal end" are relative directions, with "distal end" referring to the direction of the drill bit that is axially close to the cutting tool and "proximal end" referring to the direction of the drill bit that is axially away from the cutting tool.

[0052] Please combine Figures 1 to 5 As shown, this utility model provides a medical drill handle 100, detachably connected to a support attachment 200. The support attachment 200 is used to support the medical drill. The medical drill handle 100 includes: a mounting sleeve 11 and a locking sleeve 12. The mounting sleeve 11 is used to abut against the support attachment 200 after insertion. The mounting sleeve 11 is provided with a first circumferential limiting part 111, which cooperates with a second circumferential limiting part 211 of the support attachment 200 to circumferentially limit the support attachment 200. The locking sleeve 12 is sleeved on the mounting sleeve 11 and is operably rotatable about the axial direction of the mounting sleeve 11. The front end of the locking sleeve 12 is provided with a first axial limiting part 121. The rotational position of the locking sleeve 12 includes a locked position and an unlocked position. When the locking sleeve 12 is in the locked position and locks the support attachment 200, the first axial limiting part 121 and the second axial limiting part 212 of the support attachment 200 overlap at least partially in the circumferential direction and face each other to prevent the support attachment 200 from detaching from the mounting sleeve 11. When the locking sleeve 12 is in the unlocked position, the first axial limiting part 121 and the second axial limiting part 212 are offset in the circumferential direction so that the support attachment 200 can detach from or be inserted into the mounting sleeve 11 axially.

[0053] See Figures 6 to 12As shown, specifically, the support attachment 200 is detachably connected to the rear end (i.e., the end held by the hand) of the medical drill handle 100. The medical drill handle 100 includes a mounting sleeve 11 and a locking sleeve 12 rotatably fitted over the mounting sleeve 11. When the mounting sleeve 11 of the medical drill handle 100 is inserted into the support attachment 200, the first circumferential limiting part 111 provided on the mounting sleeve 11 is adapted to the second circumferential limiting part 211 provided on the support attachment 200 to circumferentially limit the support attachment 200. Here, "circumferential limiting" refers to preventing the support attachment 200 from rotating relative to the mounting sleeve 11. The circumferential limiting method can be, for example, a key and keyway fit, a flat rectangular structure fit, a spline structure fit, etc. In this embodiment, the first circumferential limiting part 111 and the second circumferential limiting part 211 adopt a flat rectangular structure, that is, the first circumferential limiting part 111 and the second circumferential limiting part 211 adopt a mutually compatible flat rectangular structure.

[0054] Rotating the locking sleeve 12 to the locked position allows the first axial limiting portion 121 of the locking sleeve 12 and the second axial limiting portion 212 of the support attachment 200 to at least partially overlap and face each other in the circumferential direction, thereby preventing the support attachment 200 from disengaging from the mounting sleeve 11, thus locking the support attachment 200 to the medical drill handle 100; or, rotating the locking sleeve 12 to the unlocked position allows the first axial limiting portion 121 of the locking sleeve 12 and the second axial limiting portion 212 of the support attachment 200 to be offset in the circumferential direction, so that the support attachment 200 can axially disengage from or be inserted into the mounting sleeve 11, thereby unlocking the support attachment 200 from the medical drill handle 100.

[0055] By rotating the locking sleeve 12 in the first direction to the locked position, the support accessory 200 and the medical drill handle 100 can be locked; by rotating the locking sleeve 12 in the second direction to the unlocked position, the support accessory 200 and the medical drill handle 100 can be unlocked. This design ensures both the stability of the locking and the ease of unlocking for the user.

[0056] This type of medical drill handle can lock and unlock the support accessory 200 and the medical drill handle 100 by rotating the locking sleeve 12 in different directions. When the locking sleeve is in the locked position, regardless of whether the first axial limiting part 121 and the second axial limiting part 212 are worn, the support accessory 200 cannot be directly detached from the medical drill handle 100 along the axial direction. This ensures the reliable connection between the support accessory 200 and the medical drill handle 100, avoids the risk of the support accessory 200 falling off the medical handle, and improves safety.

[0057] In some embodiments, the locking sleeve 12 is provided with a first insertion cavity for inserting the support attachment 200, and the first axial limiting portion 121 protrudes from the cavity wall of the first insertion cavity to be adapted to the second axial limiting portion 212 protruding from the outer wall of the support attachment 200; or, the locking sleeve 12 is used to insert into the second insertion cavity of the support attachment 200, and the first axial limiting portion 121 protrudes from the outer wall of the locking sleeve 12 to be adapted to the second axial limiting portion 212 protruding from the cavity wall of the second insertion cavity. Specifically, the locking sleeve 12 and the support accessory 200 can be connected by inserting the tail end of the support accessory 200 into the first insertion cavity of the locking sleeve 12, with the first axial limiting part 121 provided on the inner wall of the locking sleeve 12 and the second axial limiting part 212 provided on the outer wall of the support accessory 200 being adapted; or, the locking sleeve 12 and the support accessory 200 can be connected by inserting the front end of the locking sleeve 12 into the second insertion cavity of the support accessory 200, with the first axial limiting part 121 provided on the outer wall of the locking sleeve 12 and the second axial limiting part 212 provided on the inner wall of the support accessory 200 being adapted.

[0058] In the above embodiment, a mounting gap for inserting the support accessory 200 is provided between the locking sleeve 12 and the mounting sleeve 11. The mounting gap has a forward-facing opening. The first circumferential limiting portion 111 is provided on the outer wall of the mounting sleeve 11, and the first axial limiting portion 121 is provided on the inner wall of the locking sleeve 12. Specifically, the first circumferential limiting portion 111 is located on the outer wall of the mounting sleeve 11 to adapt to the second circumferential limiting portion 211 located on the inner wall of the support sleeve 210; the first axial limiting portion 121 is located on the inner wall of the locking sleeve 12 to adapt to the second axial limiting portion 212 located on the outer wall of the support sleeve 210. There is an installation gap between the inner wall of the front end of the locking sleeve 12 and the outer circumferential wall of the mounting sleeve 11. When the support accessory 200 is connected to the medical drill handle 100, the tail end of the support accessory 200 is at least partially inserted into the installation gap. This not only provides sufficient insertion space for the tail end of the support accessory 200, but also ensures smooth rotation of the locking sleeve 12, avoiding jamming or damage caused by too small a gap. Moreover, it increases the contact area between the connecting parts, enhances the connection strength between the support accessory 200 and the medical drill handle 100, and improves the stability of the connection through physical fitting. It also enables the locking sleeve 12 to lock or unlock the support accessory 200 more effectively when rotating.

[0059] See Figures 10 to 12Based on the same concept, this application also provides a support attachment 200 for connecting a medical drill handle 100. The medical drill handle 100 includes a mounting sleeve 11 and a locking sleeve 12. The locking sleeve 12 is sleeved outside the mounting sleeve 11 and can rotate around its own axis. The rotation position of the locking sleeve 12 includes a locked position and a non-locked position. The support attachment 200 includes a support sleeve 210 for inserting into and abutting against the mounting sleeve 11. The support sleeve 210 is provided with a second circumferential limiting part 211. The second circumferential limiting part 211 is used to cooperate with the first circumferential limiting part 111 of the mounting sleeve 11 to circumferentially limit the support sleeve 210. The rear end of the support sleeve 210 is provided with a second axial limiting part 212, which is used to cooperate with the first axial limiting part 121 of the locking sleeve 12. When the locking sleeve 12 is in the locked position to lock the support sleeve 210, the first axial limiting part 121 and the second axial limiting part 212 overlap at least partially in the circumferential direction and face each other to prevent the support sleeve 210 from disengaging from the mounting sleeve 11. When the locking sleeve 12 is in the unlocked position, the first axial limiting part 121 and the second axial limiting part 212 are offset in the circumferential direction so that the support sleeve 210 can axially disengage from or be inserted into the mounting sleeve 11.

[0060] Specifically, the support attachment 200 is detachably connected to the rear end (i.e., the end held by the hand) of the medical drill handle 100. The medical drill handle 100 includes a mounting sleeve 11 and a locking sleeve 12 rotatably fitted over the mounting sleeve 11. When the support attachment 200 is inserted into the medical drill handle 100, the second circumferential limiting part 211 on the support sleeve 210 is adapted to the first circumferential limiting part 111 on the mounting sleeve 11 to circumferentially limit the support sleeve 210. Here, "circumferential limiting" refers to preventing the support attachment 200 from rotating relative to the mounting sleeve 11. The circumferential limiting method can be, for example, a key and keyway fit, a flat rectangular structure fit, a spline structure fit, etc. In this embodiment, the first circumferential limiting part 111 and the second circumferential limiting part 211 adopt a flat rectangular structure fit. That is, the first circumferential limiting part 111 and the second circumferential limiting part 211 adopt mutually adapted flat rectangular structures.

[0061] Rotating the locking sleeve 12 in the first direction allows the first axial limiting portion 121 of the locking sleeve 12 and the second axial limiting portion 212 of the support attachment 200 to at least partially overlap and face each other in the circumferential direction, thereby preventing the support attachment 200 from disengaging from the mounting sleeve 11 and thus locking the support attachment 200 to the medical drill handle 100; or, rotating the locking sleeve 12 in the second direction allows the first axial limiting portion 121 of the locking sleeve 12 and the second axial limiting portion 212 of the support attachment 200 to be offset in the circumferential direction, so that the support attachment 200 can axially disengage from or be inserted into the mounting sleeve 11, thereby unlocking the support attachment 200 from the medical drill handle 100.

[0062] In some embodiments, the support sleeve 210 is used to insert into the first insertion cavity of the locking sleeve 12, and the second axial limiting portion 212 protrudes from the outer wall of the support sleeve 210 to adapt to the first axial limiting portion 121 protruding from the cavity wall of the first insertion cavity; or, the support sleeve 210 is provided with a second insertion cavity for inserting into the locking sleeve 12, and the second axial limiting portion 212 protrudes from the cavity wall of the second insertion cavity to adapt to the first axial limiting portion 121 protruding from the outer wall of the locking sleeve 12. Specifically, the insertion method of the support accessory 200 and the lock sleeve 12 can be that the tail end of the support sleeve 210 is inserted into the first insertion cavity of the lock sleeve 12, that is, the support sleeve 210 is partially located inside the lock sleeve 12, and the second axial limiting part 212 provided on the outer wall of the support sleeve 210 is adapted to the first axial limiting part 121 provided on the inner wall of the lock sleeve 12; or, the insertion method of the support accessory 200 and the lock sleeve 12 can be that the front end of the lock sleeve 12 is inserted into the second insertion cavity of the support sleeve 210, that is, the lock sleeve 12 is partially located inside the support sleeve 210, and the second axial limiting part 212 provided on the inner wall of the support sleeve 210 is adapted to the first axial limiting part 121 provided on the outer wall of the lock sleeve 12.

[0063] In the above embodiment, the second circumferential limiting portion 211 is disposed on the inner wall of the support sleeve 210, and the second axial limiting portion 212 is disposed on the outer wall of the support sleeve 210. Specifically, the second circumferential limiting portion 211 is located on the inner wall of the support sleeve 210 to adapt to the first circumferential limiting portion 111 located on the outer wall of the mounting sleeve 11; the second axial limiting portion 212 is located on the outer wall of the support sleeve 210 to adapt to the first axial limiting portion 121 located on the inner wall of the locking sleeve 12. There is an installation gap between the inner wall of the front end of the locking sleeve 12 and the outer circumferential wall of the mounting sleeve 11. When the support attachment 200 is connected to the medical drill handle 100, the tail end of the support attachment 200 is at least partially inserted into the installation gap.

[0064] Based on the same concept, this application also provides a medical grinding drill device, see reference. Figure 2It includes the medical drill handle 100 as described above and the support accessory 200 adapted to the medical drill handle 100; or, it includes the support accessory 200 as described above and the medical drill handle 100 adapted to the support accessory 200.

[0065] In the above embodiments, the support accessory 200 includes a support sleeve 210, a first circumferential limiting portion 111 is disposed on the outer wall of the mounting sleeve 11, a second circumferential limiting portion 211 is disposed on the inner wall of the support sleeve 210, and a first step portion 213 is provided inside the support sleeve 210, the first step portion 213 being used to axially abut against the mounting sleeve 11; or, the support accessory 200 includes a support sleeve 210, a first circumferential limiting portion 111 is disposed on the inner wall of the mounting sleeve 11, a second circumferential limiting portion 211 is disposed on the outer wall of the support sleeve 210, and a second step portion is provided inside the mounting sleeve 11, the second step portion being used to axially abut against the support sleeve 210. Specifically, the insertion method of the support sleeve 210 and the mounting sleeve 11 can be such that the tail of the support sleeve 210 is fitted over the mounting sleeve 11, the front outer wall of the mounting sleeve 11 is provided with a first circumferential limiting part 111 (outer flat square), and the rear inner wall of the support sleeve 210 is provided with a second circumferential limiting part 211 (inner flat square). The outer flat square and the inner flat square are inserted and matched, so that after the support sleeve 210 and the mounting sleeve 11 are inserted into place, the support sleeve 210 will not rotate relative to each other, thus achieving circumferential positioning; by providing a first step part 213 on the inner wall of the support sleeve 210, when the support sleeve 210 is connected to the mounting sleeve 11, the tail of the support sleeve 210 is fitted over the mounting sleeve 11, and the first step part 213 abuts against the mounting sleeve 11 axially, thereby limiting the axial position of the support sleeve 210 and the mounting sleeve 11. Alternatively, in other embodiments, the insertion method of the support sleeve 210 and the mounting sleeve 11 can be such that the front end of the mounting sleeve 11 is fitted over the support sleeve 210, the inner wall of the front end of the mounting sleeve 11 is provided with a first circumferential limiting part 111 (inner flat square), and the outer wall of the rear end of the support sleeve 210 is provided with a second circumferential limiting part 211 (outer flat square). The outer flat square and the inner flat square are inserted and matched, so that after the support sleeve 210 and the mounting sleeve 11 are inserted into place, the support sleeve 210 will not rotate relative to the support sleeve 210, thus achieving circumferential positioning. By providing a second step portion on the inner wall of the mounting sleeve 11, when the support sleeve 210 and the mounting sleeve 11 are connected, the front end of the mounting sleeve 11 is fitted over the support sleeve 210, and the second step portion abuts against the support sleeve 210 axially, thereby limiting the axial position of the support sleeve 210 and the mounting sleeve 11. The support sleeve 210 has two symmetrically arranged second circumferential limiting parts 211, and correspondingly, the mounting sleeve 11 has two symmetrically arranged first circumferential limiting parts 111. In this way, the force balance between the second circumferential limiting parts 211 of the support sleeve 210 and the first circumferential limiting parts 111 of the mounting sleeve 11 can be guaranteed.

[0066] Based on the same concept, this utility model also provides a medical grinding drill device, see reference. Figure 2 The device includes a medical drill handle 100 as described above and a support attachment 200 as described above. The medical drill handle 100 and the support attachment 200 are adapted to each other. In the first axial limiting part 121 and the second axial limiting part 212, one of the limiting parts is an annular limiting part with an insertion notch 212a. The insertion notch 212a extends axially from one side of the annular limiting part to the other side of the annular limiting part. When the locking sleeve 12 is in the non-locked position, the other limiting part can pass through the insertion notch 212a axially, so that the medical drill handle 100 and the support attachment 200 can be disengaged or inserted. Specifically, in this example, the first axial limiting portion 121 of the locking sleeve 12 is a protrusion, and the second axial limiting portion 212 of the support sleeve 210 is an annular limiting portion with an insertion notch 212a. When the locking sleeve 12 is in the unlocked position, the first axial limiting portion 121 of the locking sleeve 12 aligns with the insertion notch 212a and can pass through the insertion notch 212a of the second axial limiting portion 212 axially, so that the medical drill handle 100 and the support accessory 200 can be disengaged or inserted. When the locking sleeve 12 is rotated to the locked position, the first axial limiting portion 121 of the locking sleeve 12 can be screwed into the annular limiting portion, and the support accessory 200 is restricted from axial movement and cannot be disengaged.

[0067] In the above embodiments, the second axial limiting part 212 is the annular limiting part, the width of the insertion notch 212a gradually decreases along the direction in which the locking sleeve 12 separates from the support attachment 200, and the minimum width of the insertion notch 212a is adapted to the width of the first axial limiting part 121; or, the first axial limiting part 121 is the annular limiting part, the width of the insertion notch 212a gradually decreases along the direction in which the support attachment 200 separates from the locking sleeve 12, and the minimum width of the insertion notch 212a is adapted to the width of the second axial limiting part 212. This ensures that when the locking sleeve 12 rotates, the first axial limiting part 121 (protrusion) can smoothly enter and lock into the second axial limiting part 212 (annular limiting part), or, in other embodiments, the second axial limiting part 212 (protrusion) can smoothly enter and lock into the first axial limiting part 121 (annular limiting part), thereby achieving a stable locking between the support accessory 200 and the medical drill handle 100. This compatibility also avoids jamming and wear problems caused by size mismatch. The width of the insertion notch 212a gradually decreases, which facilitates a guiding effect during the screwing-in or screwing-out process as the locking sleeve 12 rotates, improving the smoothness of operation.

[0068] See Figure 4 and Figure 5The medical drill handle 100 further includes a locking sleeve 13 and a connecting sleeve 14. The locking sleeve 13 is fitted onto the mounting sleeve 11 and axially abuts against the interior of the locking sleeve 12. The connecting sleeve 14 is fitted onto the mounting sleeve 11 and abuts against the rear end of the locking sleeve 12. The locking sleeve 13 and the connecting sleeve 14 together limit the axial displacement of the locking sleeve 12. Specifically, the locking sleeve 13 is threaded to the mounting sleeve 11, and the connecting sleeve 14 is located at the rear end of the locking sleeve 12 and threaded to the mounting sleeve 11. The locking sleeve 13 and the connecting sleeve 14 together restrict the axial movement of the locking sleeve 12, but allow the locking sleeve 12 to rotate axially around the mounting sleeve 11. This helps the locking sleeve 12 maintain its predetermined position and stability during installation and use, thereby ensuring the precise operation and reliability of the medical drill handle 100.

[0069] When the support attachment 200 is connected to the medical drill handle 100, align the second circumferential limiting part 211 of the support sleeve 210 with the first circumferential limiting part 111 of the mounting sleeve 11 (in this example, the two flat square structures are aligned), and rotate the locking sleeve 12 so that the insertion notch 212a at the tail of the support sleeve 210 is aligned with the first axial limiting part 121 (protrusion) at the front end of the locking sleeve 12. At this time, the support sleeve 210 can be freely inserted into the medical drill handle 100. After insertion, the support attachment 200 cannot rotate relative to the medical drill handle 100, but it can be dislodged. After the support attachment 200 is inserted into place, the locking sleeve 12 is rotated to a certain angle in the first direction, causing the first axial limiting part 121 (protrusion) on the locking sleeve 12 to screw into the annular limiting part of the support sleeve 210 from the insertion notch 212a. The support attachment 200 is restricted from axial movement and cannot be dislodged. At this time, the support attachment 200 can neither move axially nor rotate circumferentially, and the support attachment 200 is locked. Conversely, rotating the locking sleeve 12 to a certain angle in the second direction allows the first axial limiting part 121 (protrusion) at the front end of the locking sleeve 12 to rotate out from the annular limiting part on the support sleeve 210 to the insertion notch 212a. At this time, the support attachment 200 can be dislodged from the medical drill handle 100, thus unlocking the support attachment 200 from the medical drill handle 100.

[0070] In summary, the medical drill handle 100, support attachment 200, and medical drill device provided by this utility model, through the cooperation of the first circumferential limiting part 111 provided on the mounting sleeve 11 and the second circumferential limiting part 211 provided on the support attachment 200, circumferentially limit the support attachment 200; through the first axial limiting part 121 provided on the locking sleeve 12 and the second axial limiting part 212 provided on the support attachment 200 overlapping and opposing each other in the circumferential direction, the support attachment 200 is prevented from detaching from the mounting sleeve 11. In this way, regardless of whether the first axial limiting part 121 and the second axial limiting part 212 are worn, the support attachment cannot directly detach from the medical drill handle along the axial direction, ensuring reliable connection between the support attachment and the medical drill handle, avoiding the risk of the support attachment detaching from the medical handle, and improving safety.

[0071] 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 medical drill handle, detachably connected to a support accessory, said support accessory for supporting the medical drill, characterized in that, The medical drill handle includes: The mounting sleeve is used to abut against the support accessory after being inserted. The mounting sleeve is provided with a first circumferential limiting part, which is used to cooperate with the second circumferential limiting part of the support accessory to circumferentially limit the support accessory. A locking sleeve is fitted over the mounting sleeve and is operably rotatable about the axial direction of the mounting sleeve. The front end of the locking sleeve is provided with a first axial limiting part. The rotational positions of the locking sleeve include a locked position and an unlocked position. When the locking sleeve is in the locked position and locks the support accessory, the first axial limiting portion and the second axial limiting portion of the support accessory overlap at least partially in the circumferential direction and face each other to prevent the support accessory from detaching from the mounting sleeve; when the locking sleeve is in the unlocked position, the first axial limiting portion and the second axial limiting portion are offset in the circumferential direction so that the support accessory can axially detach from or insert into the mounting sleeve.

2. The medical drill handle according to claim 1, characterized in that, The locking sleeve is provided with a first insertion cavity for inserting the support accessory, and the first axial limiting part protrudes from the cavity wall of the first insertion cavity to be adapted to the second axial limiting part protruding from the outer wall of the support accessory. or, The locking sleeve is used to insert into the second insertion cavity of the support accessory. The first axial limiting part protrudes from the outer wall of the locking sleeve to adapt to the second axial limiting part protruding from the cavity wall of the second insertion cavity.

3. The medical drill handle according to claim 2, characterized in that, There is an installation gap between the lock sleeve and the mounting sleeve for inserting a support accessory. The installation gap has a forward-facing opening. The first circumferential limiting portion is provided on the outer wall of the mounting sleeve, and the first axial limiting portion is provided on the inner wall of the lock sleeve.

4. A support accessory for connecting a medical drill handle, characterized in that, The medical drill handle includes a mounting sleeve and a locking sleeve. The locking sleeve is fitted outside the mounting sleeve and can rotate about its own axis. The rotation position of the locking sleeve includes a locked position and an unlocked position. The support accessory includes: A support sleeve is used to abut against the mounting sleeve after being inserted. The support sleeve is provided with a second circumferential limiting part, which is used to cooperate with the first circumferential limiting part of the mounting sleeve to circumferentially limit the support sleeve. The rear end of the support sleeve is provided with a second axial limiting part, which is used to cooperate with the first axial limiting part of the locking sleeve. When the locking sleeve is in the locked position and locks the support sleeve, the first axial limiting portion and the second axial limiting portion overlap at least partially in the circumferential direction and face each other to prevent the support sleeve from detaching from the mounting sleeve; when the locking sleeve is in the unlocked position, the first axial limiting portion and the second axial limiting portion are offset in the circumferential direction so that the support sleeve can axially detach from or insert into the mounting sleeve.

5. The supporting accessory according to claim 4, characterized in that, The support sleeve is used to insert into the first insertion cavity of the lock sleeve, and the second axial limiting part protrudes from the outer wall of the support sleeve to adapt to the first axial limiting part protruding from the cavity wall of the first insertion cavity. or, The support sleeve is provided with a second insertion cavity for inserting the lock sleeve, and the second axial limiting part protrudes from the cavity wall of the second insertion cavity to be adapted to the first axial limiting part protruding from the outer wall of the lock sleeve.

6. The supporting accessory according to claim 5, characterized in that, The second circumferential limiting part is provided on the inner wall of the support sleeve, and the second axial limiting part is provided on the outer wall of the support sleeve.

7. A medical grinding and drilling device, characterized in that, It includes a medical drill handle as described in any one of claims 1-3 and a support accessory adapted to the medical drill handle; or, it includes a support accessory as described in any one of claims 4-6 and a medical drill handle adapted to the support accessory.

8. The medical grinding and drilling device according to claim 7, characterized in that, The support accessory includes a support sleeve, a first circumferential limiting portion is provided on the outer wall of the mounting sleeve, a second circumferential limiting portion is provided on the inner wall of the support sleeve, and a first step portion is provided inside the support sleeve, the first step portion being used to abut against the mounting sleeve axially; or, The support accessory includes a support sleeve, a first circumferential limiting portion is provided on the inner wall of the mounting sleeve, a second circumferential limiting portion is provided on the outer wall of the support sleeve, and a second step portion is provided inside the mounting sleeve, the second step portion being used to abut against the support sleeve axially.

9. A medical grinding and drilling device, characterized in that, The medical drill handle as described in any one of claims 1-3 and the support accessory as described in any one of claims 4-6 are adapted to each other, characterized in that: In the first axial limiting part and the second axial limiting part, one of the limiting parts is an annular limiting part with an insertion notch. The insertion notch extends from one side of the annular limiting part to the other side of the annular limiting part in the axial direction. When the locking sleeve is in the non-locking position, the other limiting part can pass through the insertion notch in the axial direction so that the medical drill handle and the support accessory can be disengaged or inserted.

10. The medical grinding and drilling device according to claim 9, characterized in that, The second axial limiting part is the annular limiting part, the width of the insertion notch gradually decreases along the direction in which the locking sleeve separates from the supporting accessory, and the minimum width of the insertion notch is adapted to the width of the first axial limiting part. or, The first axial limiting part is the annular limiting part, the width of the insertion notch gradually decreases along the direction in which the support accessory separates from the locking sleeve, and the minimum width of the insertion notch is adapted to the width of the second axial limiting part.

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