Medical electric tool

Abstract

The utility model relates to a medical electric tool which comprises a handle part and a cutter part detachably connected with the handle part. The cutter part comprises a first connecting pipe and an annular groove formed in the outer wall of the first connecting pipe. The handle part comprises a handle, a second connecting pipe connected with the handle, a through hole formed in the second connecting pipe and a clamping piece arranged on the second connecting pipe. The pipe diameter of the first connecting pipe is smaller than that of the second connecting pipe. The second connecting pipe enters the first connecting pipe, and the clamping piece penetrates through the through hole to be matched with the annular groove. The annular groove is formed in the outer wall of the first connecting pipe, and the clamping piece is arranged on the second connecting pipe, so that when different types of cutter parts need to be replaced, the handle part and the cutter parts are connected and separated by operating the connection and separation of the clamping piece and the annular groove, the structure is simple, the operation is convenient, and the practicability is high. And different types of cutters can be conveniently and quickly replaced.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a medical power tool. Background Technology

[0002] In modern surgical procedures, especially in orthopedic surgery, tools such as bone drills, trephine saws, reciprocating saws, and oscillating saws are typically used to cut and drill into bones at different locations.

[0003] To facilitate surgical procedures, medical power tools, which can be equipped with cutting tools such as trephine saws and oscillating saws, are commonly used. These tools contain a motor, the output shaft of which is connected to the various cutting tools. The surgeon holds the handle of the medical power tool and presses a button on it, which then rotates the motor, moving the cutting tools.

[0004] However, there are currently few medical power tools with replaceable blades, and the existing blade replacement mechanisms are complex and difficult to use. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a medical power tool with a simple structure and easy replacement of various cutting tools.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A medical power tool includes a handle portion and a cutting tool portion detachably connected to the handle portion. The cutting tool portion includes a first connecting tube and an annular groove disposed on the outer wall of the first connecting tube. The handle portion includes a handle, a second connecting tube connected to the handle, a through hole disposed on the second connecting tube, and a snap-fit ​​component disposed on the second connecting tube. The diameter of the first connecting tube is smaller than the diameter of the second connecting tube. The second connecting tube enters the first connecting tube, and the snap-fit ​​component passes through the through hole and engages with the annular groove. The snap-fit ​​component restricts the movement of the first connecting tube in the axial direction of the second connecting tube.

[0008] Furthermore, the snap-fit ​​component is a U-shaped buckle, which includes a base, support columns at both ends of the base, and a locking block at the end of the support column away from the base. The distance between the two support columns is greater than the diameter of the first connecting pipe, and the two locking blocks are arranged opposite each other, with the distance between the two locking blocks being less than the diameter of the annular groove. The base is located outside the second connecting pipe, and the locking block passes through the through hole and abuts against the bottom surface of the annular groove. The support columns are bent and deformed.

[0009] Furthermore, the base is connected to the second connecting tube via a spring.

[0010] Furthermore, the second connecting pipe is provided with a first ring tooth arranged coaxially with the second connecting pipe, and the first connecting pipe is provided with a second ring tooth arranged coaxially with the first connecting pipe, the first ring tooth cooperating with the second ring tooth.

[0011] Furthermore, the handle portion also includes a motor disposed within the handle portion, and the cutting tool portion also includes a cutting tool input shaft disposed within the first connecting tube and a cutting tool connected to the cutting tool input shaft. The output shaft of the motor cooperates with the cutting tool input shaft, and the cutting tool is eccentrically disposed relative to the axis of the cutting tool input shaft.

[0012] Furthermore, the cutting tool section also includes an eccentric wheel disposed on the cutting tool input shaft and a shift fork cooperating with the eccentric wheel. The cutting tool is connected to the shift fork, and the axis of the eccentric wheel is offset from the axis of the cutting tool input shaft.

[0013] Furthermore, the motor's output shaft has a first connecting claw at the end facing the tool input shaft, and the motor's output shaft has a second connecting claw at the end facing the tool input shaft, with the first connecting claw and the second connecting claw cooperating with each other.

[0014] Furthermore, the handle portion also includes a protective tube, which is sleeved over the second connecting tube and covers the through hole.

[0015] Furthermore, the cutting tool is a ring saw or a oscillating saw.

[0016] Furthermore, the handle portion also includes a motor disposed within the handle portion, and the cutting tool portion also includes a cutting tool input shaft disposed within the first connecting tube and a bone drill connected to the cutting tool input shaft. The output shaft of the motor cooperates with the cutting tool input shaft, and the bone drill is coaxially arranged with the cutting tool input shaft.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting an annular groove on the outer wall of the first connecting pipe and setting a snap-fit ​​member on the second connecting pipe, when it is necessary to change different types of tool parts, the engagement and separation of the handle part and the tool part can be realized by operating the engagement and separation of the snap-fit ​​member and the annular groove. The structure is simple, the operation is convenient, and it is easy to quickly change between different types of tools. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the handle and the cutting tool in the medical power tool of this utility model, in a separated state.

[0019] Figure 2 This is a three-dimensional schematic diagram of the cutting tool part of this utility model;

[0020] Figure 3 This is a three-dimensional schematic diagram of the handle portion of this utility model with the first ring tube omitted;

[0021] Figure 4 This is a first perspective view of the handle portion of this utility model;

[0022] Figure 5 yes Figure 4 Enlarged diagram of section A in the middle;

[0023] Figure 6 This is a three-dimensional schematic diagram of the card block 1dc of this utility model in the state of engagement with the annular groove;

[0024] Figure 7 yes Figure 6 Enlarged diagram of section B in the middle;

[0025] Figure 8 This is a second perspective view of the handle portion of this utility model;

[0026] Figure 9 This is a front view of the handle and the cutting tool in the medical power tool of this utility model, in the state of mutual engagement.

[0027] Figure 10 yes Figure 9 A cross-sectional view of the C-C plane;

[0028] Figure 11 This is a first three-dimensional schematic diagram of the positional relationship between the shift fork and the tool input shaft in the tool section of this utility model;

[0029] Figure 12 This is a second three-dimensional schematic diagram of the positional relationship between the shift fork and the tool input shaft in the tool section of this utility model;

[0030] Figure 13 This is a three-dimensional schematic diagram of the handle and the cutting tool in the medical power tool of this utility model, showing their engagement.

[0031] In the picture:

[0032] 1 – Handle section; 1a – Handle; 1b – Second connecting tube; 1c – Through hole; 1d – U-shaped buckle; 1da – Base; 1db – Support column; 1dc – Locking block; 1e – First ring tooth; 1f – Second connecting claw; 1g – Protective tube; 1ga – First ring tube; 1gb – Second ring tube; 1h – Button; 1i – External thread; 2 – Tool section; 2a – First connecting tube; 2b – Ring groove; 2c – Second ring tooth; 2d – Tool input shaft; 2e – Eccentric wheel; 2f – Shift fork; 2g – First connecting claw; 2h – Ring saw. Detailed Implementation

[0033] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0036] This utility model is an improvement on the blade changing mechanism in medical power tools. For example... Figures 1 to 7 As shown, this utility model discloses a medical power tool, including a handle 1 and a cutting blade 2 detachably connected to the handle 1. The handle 1 is used by the doctor to hold the tool during surgery, and the cutting blade 2 is used to cut human bones during surgery. The handle 1 is used in conjunction with several cutting blades 2. Each cutting blade 2 includes different types of blades, each type used for surgical operations on bones at different locations. These blades can be oscillating saws, bone drills, reciprocating saws, etc. Figure 1 and Figure 2 As shown, the cutting tool section 2 includes a first connecting pipe 2a and an annular groove 2b disposed on the outer wall of the first connecting pipe 2a. Figures 3 to 5As shown, the handle part 1 includes a handle 1a, a second connecting tube 1b connected to the handle 1a, a through hole 1c provided on the second connecting tube 1b, and a snap-fit ​​member provided on the second connecting tube 1b. When the handle part 1 is connected to the cutting tool part 2, the first connecting tube 2a is located on the inner side of the inner wall of the second connecting tube 1b, so the diameter of the first connecting tube 2a is smaller than the diameter of the second connecting tube 1b. The method of using the medical power tool of this utility model is as follows:

[0037] When it is necessary to engage the handle part 1 and the cutting tool part 2, insert the second connecting tube 1b into the first connecting tube 2a until the annular groove 2b aligns with the through hole 1c. Then, pass the snap-fit ​​device through the through hole and engage with the annular groove 2b. Because the snap-fit ​​device is now within the annular groove 2b, it limits the first connecting tube 2a along its axial direction, preventing it from being pulled out of the second connecting tube 1b, thus engaging the handle part 1 and the cutting tool part 2. When it is necessary to separate the handle part 1 and the cutting tool part 2, separate the snap-fit ​​device from the annular groove 2b, allowing the first connecting tube 2a to be pulled out from the second connecting tube 1b, thereby separating the cutting tool part 2 from the handle part 1.

[0038] This invention features an annular groove 2b on the outer wall of the first connecting pipe 2a and a snap-fit ​​component on the second connecting pipe 1b. Therefore, when different types of tool parts 2 need to be replaced, the engagement and disengagement of the handle part 1 and the tool part 2 are achieved by operating the snap-fit ​​component to engage and disengage with the annular groove 2b. The structure is simple, the operation is convenient, and it facilitates rapid replacement of different types of tools.

[0039] In the medical power tool of this utility model, many technical features such as the shape of the snap-fit ​​component, the position of the snap-fit ​​component, and the type of cutting tool have multiple implementations. Below, for each of these technical features, including the shape of the snap-fit ​​component, one implementation is selected for detailed description, and the embodiment in which this implementation is located is referred to as this embodiment. Other implementations of the snap-fit ​​component's shape and other features are referred to as other embodiments, which are briefly described below.

[0040] In this embodiment, as Figures 8 to 10As shown, the snap-fit ​​component uses a U-shaped buckle 1d. The U-shaped buckle 1d includes a base 1da, two support columns 1db disposed at both ends of the base 1da, and locking blocks 1dc disposed on the support columns 1db. There are two support columns 1db, which cooperate with the base 1da to form a U-shape. The two locking blocks 1dc are both disposed at the ends of the support columns 1db away from the base 1da, and the two locking blocks 1dc are positioned opposite each other. The distance between the two locking blocks 1dc is less than the diameter of the annular groove 2b, that is, the diameter of the annular surface formed at the bottom of the concave surface of the annular groove 2b is greater than the distance between the two locking blocks 1dc. At the same time, the distance between the two support columns 1db is greater than the diameter of the first connecting pipe 2a, and the base 1da is disposed outside the second connecting pipe 1b. The working principle of the U-shaped buckle 1d in this embodiment is as follows:

[0041] During the movement of the two support pillars 1db, they both move within the plane of the circular cross-section of the annular groove 2b, thus causing the two locking blocks 1dc to also move within the plane of the circular cross-section of the annular groove 2b. When it is necessary to connect the first connecting pipe 2a and the second connecting pipe 1b, the base 1da is moved, causing the support pillars 1db to move, which in turn causes the two locking blocks 1dc to pass through the through hole 1c and enter the annular groove 2b, so that the two locking blocks 1dc abut against the bottom surface of the annular groove 2b, and the two locking blocks 1dc are moved to a position where the two locking blocks 1dc are symmetrical with respect to the center of the annular groove 2b. At this time, because the diameter of the annular surface formed at the bottom of the concave surface of the annular groove 2b is larger than the distance between the two locking blocks 1dc under normal conditions, the two support pillars 1db undergo bending deformation. The deformation force of the two support pillars 1db allows the two locking blocks 1dc to clamp the first connecting pipe 2a. Since both locking blocks 1dc pass through the through holes 1c on the second connecting pipe 1b, the first connecting pipe 2a cannot move in the axial direction of the second connecting pipe 1b, thus completing the engagement of the first connecting pipe 2a and the second connecting pipe 1b, and thereby realizing the engagement of the handle part 1 and the tool part 2.

[0042] When it is necessary to separate the first connecting pipe 2a and the second connecting pipe 1b, similarly, moving the base 1da moves the support column 1db, which in turn moves both locking blocks 1dc away from the annular groove 2b. Since the distance between the two supports 1db is greater than the diameter of the first connecting pipe 2a, neither the locking blocks 1dc nor the support column 1db restricts the movement of the first connecting pipe 2a in the axial direction of the second connecting pipe 1b. At this time, the first connecting pipe 2a and the second connecting pipe 1b can be separated, thereby realizing the separation of the handle part 1 and the tool part 2.

[0043] This invention, through the U-shaped buckle 1d, facilitates the connection and separation of the first connecting pipe 2a and the second connecting pipe 1b. In other embodiments, the snap-fit ​​element can also be a snap fastener, which includes a fastening element and a connecting element. One end of the connecting element is connected to the outer surface of the second connecting pipe 1b, and the other end of the connecting element is connected to the fastening element. The fastening element engages with the annular groove 2c. When it is necessary to connect the first connecting pipe 2a and the second connecting pipe 1b, the fastening element is operated to pass through the through hole 1c and snap into the annular groove 2c. When it is necessary to separate the first connecting pipe 2a and the second connecting pipe 1b, the fastening element is operated to leave the annular groove 2c and positioned on the outward-facing side of the outer wall of the second connecting pipe 1b.

[0044] In this embodiment, as Figure 9 and Figure 10 As shown, the base 1da is connected to the second connecting tube 1b via a spring. Furthermore, in this embodiment, when the medical power tool of this invention is located as shown... Figure 9 In the indicated position, the base 1da is positioned below the second connecting pipe 1b, following the downward direction of gravity. When the base 1da moves upward, it causes the locking block 1dc to abut against the annular groove 2b, at which point the spring is compressed. When it is necessary to separate the first connecting pipe 2a and the second connecting pipe 1b, the spring returns to its original position, and the base 1da moves downward under gravity. This invention, through the spring setting and the limitation of the base 1da's position, facilitates the operation of the U-shaped buckle 1d. In other embodiments, the base 1da can also be positioned as follows... Figure 10 Above the second connecting tube 1b shown, the base 1da and the second connecting tube 1b are not connected by a spring. Instead, the base 1da and the second connecting tube 1b are connected by a slider rail, and two limit blocks are set on the rail so that the slider slides between the two limit blocks. The slider is connected to the base 1da, and the rail is connected to the second connecting tube 1b.

[0045] In this embodiment, as Figure 2 and Figure 3 As shown, the second connecting pipe 1b is provided with a first ring tooth 1e arranged coaxially with the second connecting pipe 1b, and the first connecting pipe 2a is provided with a second ring tooth 2c arranged coaxially with the first connecting pipe 2a. The first ring tooth 1e and the second ring tooth 2c cooperate. In different types of cutting tool sections 2, some cutting tools on the cutting tool section 2 are offset from the axis of the first connecting pipe 2a. In this embodiment, both the first ring tooth 1e and the second ring tooth 2c are provided with twelve locking teeth. Therefore, the first connecting pipe 2a has twelve different positions relative to the second connecting pipe 1b. That is, when the cutting tool section 2 and the handle section 1 are engaged, the cutting tool on the cutting tool section 2 has twelve positions relative to the handle section 1. During the use of the medical electric tool of this utility model, when the cutting tool on the cutting tool section 2 is in a suitable surgical position, for example, as Figure 3As shown, the appropriate surgical position of the blade on the cutting tool section 2 is that the blade on the cutting tool section 2 is positioned above the first ring tooth 1e. After positioning the blade on the cutting tool section 2 above the first ring tooth 1e, the retaining teeth between the first ring tooth 1e and the second ring tooth 2c are then engaged with each other. This invention, through the arrangement of the first ring tooth 1e and the second ring tooth 2c, allows the blade on the cutting tool section 2 to have multiple fixed positions. In other embodiments, a position adjustment structure can also be provided on the cutting tool section 2, allowing the blade on the cutting tool section 2 to switch between multiple positions.

[0046] In this embodiment, as Figures 2 to 5 As shown, the handle section 1 also includes a motor disposed within the handle section 1 and a button 1h disposed on the handle 1a. The button 1h is electrically connected to the motor; pressing the button 1h rotates the output shaft of the motor. The tool section 2 also includes a tool input shaft 2d disposed within the first connecting pipe 2a and a tool connected to the tool input shaft 2d. When the first connecting pipe 2a and the second connecting pipe 1b are engaged, the output shaft of the motor cooperates with the tool input shaft 2d. Therefore, pressing the button 1h transmits the power output by the motor to the tool, allowing the tool to move.

[0047] In this embodiment, as Figures 2 to 5 As shown, and as Figure 11 and Figure 12 As shown, the motor's output shaft has a first connecting claw 2g at the end facing the tool input shaft 2d, and a second connecting claw 1f at the other end facing the tool input shaft 2d. The first connecting claw 2g and the second connecting claw 1f engage with each other. When the motor's output shaft is connected to the tool input shaft 2d, the first connecting claw 2g and the second connecting claw 1f mesh. This invention facilitates the engagement between the motor's output shaft and the tool input shaft 2d through the arrangement of the first connecting claw 2g and the second connecting claw 1f. In other embodiments, a spline engagement can also be used between the motor's output shaft and the tool input shaft 2d.

[0048] In this embodiment, as Figure 8 and Figure 13 As shown, the handle portion 1 also includes a protective tube 1g, which is sleeved outside the second connecting tube 1b and covers the through hole 1c. This invention prevents dust from entering the second connecting tube 1b through the through hole 1c by providing the protective tube 1g. In other embodiments, a baffle plate may also be provided only outside the second connecting tube 1b to cover the through hole 1c.

[0049] In this embodiment, as Figure 3 , Figure 8 and Figure 13As shown, the protective tube 1g consists of a first ring tube 1ga and a second ring tube 1gb. The second ring tube 1gb has a through hole for the support column 1db to pass through. Both the first ring tube 1ga and the second ring tube 1gb are coaxially aligned with the second connecting tube 1b. The second ring tube 1gb is connected to the handle 1a, and the first ring tube 1ga is located on the side of the second ring tube 1gb away from the handle 1a. The outer wall of the second connecting tube 1b has an external thread 1i, and the inner wall of the first ring tube 1ga has an internal thread that mates with the external thread 1i. During the assembly process of this medical power tool, the second ring tube 1gb is assembled first, then the U-shaped buckle 1d is assembled into the through hole, and then the internal thread of the first ring tube 1ga is screwed onto the external thread 1i until the first ring tube 1ga and the second ring tube 1gb abut against each other. The arrangement of the first ring tube 1ga and the second ring tube 1gb facilitates the assembly of the protective tube 1g. In other embodiments, the first ring tube 1ga and the second connecting tube 1b can be fitted with a sliding groove.

[0050] In the medical power tool of this utility model, the specific types of the cutting tool part 2 can be as follows:

[0051] The first type involves an eccentric setting of the cutting tool relative to the axis of the cutting tool input shaft 2d. The cutting tools in this type of cutting tool unit 2 are primarily saw-like tools. By setting different forms of the transmission mechanism between the cutting tool input shaft 2d and the cutting tool, the cutting tool can rotate, reciprocate, and move up and down to meet the needs of different surgical positions. In this case, the cutting tool can be switched between different positions by adjusting the relative position between the first ring tooth 1e and the second ring tooth 2c.

[0052] The second type involves tools whose axis is coaxial with the axis of the tool input shaft 2d. The tools in this type of tool section 2 are primarily bone drills. In this case, the position of the bone drill remains unaffected regardless of how the relative positions of the first ring tooth 1e and the second ring tooth 2c are adjusted.

[0053] The following section will focus on a detailed explanation of the first type of cutting tool section 2.

[0054] like Figure 11 and Figure 12 As shown, the first type of tool section 2 can include: an eccentric wheel 2e disposed on the tool input shaft 2d, and a shift fork 2f cooperating with the eccentric wheel 2e. Specifically, the eccentric wheel 2e is disposed in the U-shaped groove of the shift fork 2f. The tool in the tool section 2 is connected to the shift fork 2f, and the axis of the eccentric wheel is offset from the axis of the tool input shaft 2d. Therefore, when the tool input shaft 2d rotates under the drive of the motor output shaft, the eccentric wheel 2e rotates around the axis of the tool input shaft 2d, and the eccentric wheel 2e contacts both sides of the U-shaped groove in the shift fork 2f in sequence, causing the shift fork 2f to swing back and forth, thereby causing the tool to swing back and forth. The tool in the first type of tool section 2 can be a oscillating saw or a similar tool. Figure 11 The ring saw in the middle is used for 2 hours.

[0055] The first type of cutting tool section 2 can also be: the cutting tool in the first type of cutting tool section 2 is a reciprocating saw, which is different from the cutting tool being a ring saw 2h. When the cutting tool is a reciprocating saw, the shift fork 2f is not directly connected to the reciprocating saw, but rather a guide shaft is connected between the shift fork 2f and the reciprocating saw. As the shift fork 2f reciprocates, it drives the guide shaft to reciprocate in a single direction, thereby driving the reciprocating saw to reciprocate in a single direction.

[0056] In summary, the medical power tool of this utility model, by providing an annular groove 2b on the outer wall of the first connecting tube 2a and by providing a snap-fit ​​component on the second connecting tube 1b, achieves the engagement and disengagement of the handle part 1 and the cutting tool part 2 through the engagement and disengagement of the snap-fit ​​component with the annular groove 2b, facilitating the quick replacement of different types of cutting tools. The U-shaped buckle 1d facilitates the engagement and disengagement between the first connecting tube 2a and the second connecting tube 1b. The spring, which limits the position of the base 1da, facilitates the operation of the U-shaped buckle 1d. The first ring tooth 1e and the second ring tooth 2c provide multiple fixed positions for the cutting tool on the cutting tool part 2. The motor allows the cutting tool to move. The first connecting claw 2g and the second connecting claw 1f facilitate the engagement of the motor's output shaft with the cutting tool's input shaft 2d. The protective tube 1g prevents dust from entering the second connecting tube 1b through the through hole 1c. The first annular tube 1ga and the second annular tube 1gb facilitate the assembly of the protective tube 1g.

[0057] It should be emphasized that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A medical power tool, comprising a handle portion (1) and a cutting tool portion (2) detachably connected to the handle portion (1), characterized in that, The cutting tool part (2) includes a first connecting tube (2a) and an annular groove (2b) disposed on the outer wall of the first connecting tube (2a). The handle part (1) includes a handle (1a), a second connecting tube (1b) connected to the handle (1a), a through hole (1c) disposed on the second connecting tube (1b), and a snap-fit ​​member disposed on the second connecting tube (1b). The diameter of the first connecting tube (2a) is smaller than the diameter of the second connecting tube (1b). The second connecting tube (1b) enters the first connecting tube (2a). The snap-fit ​​member passes through the through hole and engages with the annular groove (2b). The snap-fit ​​member restricts the movement of the first connecting tube (2a) in the axial direction of the second connecting tube (1b).

2. The medical power tool according to claim 1, characterized in that, The snap-fit ​​component is a U-shaped buckle (1d), which includes a base (1da), two support pillars (1db) disposed at both ends of the base (1da), and a locking block (1dc) disposed at the end of the support pillar (1db) away from the base (1da). The distance between the two support pillars (1db) is greater than the diameter of the first connecting pipe (2a). The two locking blocks (1dc) are disposed opposite each other, and the distance between the two locking blocks (1dc) is less than the diameter of the annular groove (2b). The base (1da) is disposed outside the second connecting pipe (1b). The locking block (1dc) passes through the through hole (1c) and abuts against the bottom surface of the annular groove (2b). The support pillar (1db) is bent and deformed.

3. The medical power tool according to claim 2, characterized in that, The base (1da) is connected to the second connecting tube (1b) by a spring.

4. The medical power tool according to claim 1, characterized in that, The second connecting pipe (1b) is provided with a first ring tooth (1e) arranged on the same axis as the second connecting pipe (1b), and the first connecting pipe (2a) is provided with a second ring tooth (2c) arranged on the same axis as the first connecting pipe (2a). The first ring tooth (1e) and the second ring tooth (2c) cooperate with each other.

5. The medical power tool according to claim 4, characterized in that, The handle part (1) further includes a motor disposed in the handle part (1), and the cutting tool part (2) further includes a cutting tool input shaft (2d) disposed in the first connecting pipe (2a) and a cutting tool connected to the cutting tool input shaft (2d). The output shaft of the motor cooperates with the cutting tool input shaft (2d), and the cutting tool is eccentrically disposed relative to the axis of the cutting tool input shaft (2d).

6. The medical power tool according to claim 5, characterized in that, The cutting tool section (2) further includes an eccentric wheel (2e) disposed on the cutting tool input shaft (2d) and a shift fork (2f) cooperating with the eccentric wheel (2e). The cutting tool is connected to the shift fork (2f), and the axis of the eccentric wheel is offset from the axis of the cutting tool input shaft (2d).

7. The medical power tool according to claim 5, characterized in that, The motor output shaft is provided with a first connecting claw (2g) at one end facing the tool input shaft (2d), and the motor output shaft is provided with a second connecting claw (1f) at the other end facing the tool input shaft (2d). The first connecting claw (2g) and the second connecting claw (1f) cooperate with each other.

8. The medical power tool according to claim 3, characterized in that, The handle part (1) also includes a protective tube (1g), which is sleeved on the outside of the second connecting tube (1b) and covers the through hole (1c).

9. The medical power tool according to claim 6, characterized in that, The cutting tool is a ring saw (2h) or a oscillating saw.

10. The medical power tool according to claim 4, characterized in that, The handle part (1) further includes a motor disposed in the handle part (1), and the cutting tool part (2) further includes a cutting tool input shaft (2d) disposed in the first connecting pipe (2a) and a bone drill connected to the cutting tool input shaft (2d). The output shaft of the motor cooperates with the cutting tool input shaft (2d), and the bone drill is coaxially arranged with the cutting tool input shaft (2d).

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