Planing handpiece

Abstract

The utility model relates to a planing handpiece. The planing handpiece comprises a fixed seat, a rotating mechanism and a locking structure, a first assembly hole is formed in the fixed seat; the rotating mechanism is inserted into the first assembly hole and is provided with a second assembly hole in which the cutter body is inserted, and the rotating mechanism is detachably connected with the cutter body; the locking structure is movably connected to the fixed seat and has a locking position and an unlocking position; one of the locking structure and the rotating mechanism is provided with a positioning part, the other one of the locking structure and the rotating mechanism is provided with a positioning bulge, and at least one of the positioning bulges and the limiting grooves is provided with a plurality of positioning bulges and limiting grooves which are arranged along the circumferential direction of the rotating mechanism; at the locking position, the positioning bulge is inserted into the limiting groove; and at the unlocking position, the positioning bulge is separated from the limiting groove to unlock. The rotating mechanism can clamp the cutter body and drive the cutter body to rotate at the same time, the locking structure locks the rotating mechanism in the mode that the positioning protrusion is matched with the limiting groove, the structure is simple, the number of parts involved in the whole is small, matching is few, the machining precision is reduced, and the production efficiency is improved.

Description

Technical Field

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

[0002] Currently, surgical planers are commonly used in otolaryngology, where doctors use them to remove lesions. In practical applications, the cutting point of a non-linear planer is set at a certain angle to the axis of the tool's extension. Non-linear planers require angle adjustment and rotation, but generally, during surgery, doctors only control the back-and-forth movement of the planer while keeping their wrist relatively still to avoid injury to the patient. This prevents the planer from being adjusted when cutting lesions in specific locations, hindering efficient surgery. The mainstream solution for the planer's rotation mechanism is as follows: a pair of bevel gears are located at the tail of the planer's clamping component. Driving these bevel gears rotates the planer. A crank mechanism at the lower end of the clamping component engages with the bevel gears, locking them in place when cranked.

[0003] However, bevel gears need to be welded to the planing tool holder, which involves many parts and corresponding mating dimensions, requiring high precision and affecting processing efficiency. Utility Model Content

[0004] Therefore, it is necessary to provide a planing handpiece to address the above-mentioned technical problems, so as to reduce the number of parts to be fitted while the planing tool rotates, thereby reducing the requirement for machining accuracy and promoting efficient production.

[0005] The planing handpiece includes a tool body, a fixed base, a rotating mechanism, and a locking structure. The fixed base has a first mounting hole. The rotating mechanism is inserted into the first mounting hole and has a second mounting hole for inserting the tool body; the rotating mechanism is detachably connected to the tool body. The locking structure is movably connected to the fixed base and has a locked position and an unlocked position. One of the locking structure and the rotating mechanism has a limiting groove, and the other has a positioning protrusion. At least one of the positioning protrusion and the limiting groove has multiple protrusions arranged circumferentially along the rotating mechanism. In the locked position, the positioning protrusion is inserted into the limiting groove to lock the rotating mechanism to the fixed base. In the unlocked position, the positioning protrusion disengages from the limiting groove to release the lock, and the rotating mechanism can rotate relative to the fixed base around its own axis.

[0006] Understandably, the fixed base has a first mounting hole to facilitate the installation of the rotating mechanism and support its rotation. The rotating mechanism is detachably connected to the tool body to allow for the selection and replacement of different types of tool bodies according to actual conditions, and can drive the tool body to rotate, allowing for the selection of a suitable cutting angle. The locking structure and the rotating mechanism lock the rotation of the rotating mechanism through the cooperation of the limiting groove and the positioning protrusion. The structure is simple and easy to manufacture. The entire planing handpiece only requires the rotating mechanism to cooperate with the tool body. While driving the tool body to rotate, it also clamps the tool body. The locking structure used to lock the rotating mechanism is simple in structure, requiring no external transmission structure to drive the rotation, nor does it require an additional transmission structure for locking. It involves fewer parts and related fits, has lower precision requirements for machining, is simple to manufacture, and helps to improve machining efficiency.

[0007] In one embodiment, the rotating mechanism has an axial direction, the positioning protrusion and the limiting groove are arranged opposite to each other along the axial direction, the locking structure is slidably connected to the fixed seat and can reciprocate along the axial direction to switch the locked position and the unlocked position.

[0008] Understandably, this design allows the locking structure to reciprocate along its own axis, thereby changing the position of the positioning protrusion relative to the limiting groove, making operation simple.

[0009] In one embodiment, one of the locking structure and the fixing seat is provided with a connecting arm, and the other is provided with a limiting hole. The connecting arm passes through the limiting hole and can move along the axial direction within the limiting hole.

[0010] It is understandable that the limiting hole and the connecting arm can form a limit along the radial direction of the limiting hole, that is, restrict the locking structure from moving radially relative to the fixed seat, so that the locking structure can only move axially relative to the fixed seat along the rotating mechanism, thus playing a limiting and guiding role in the movement of the locking structure.

[0011] In one embodiment, the planing handpiece further includes a first limiting component connected between the fixed base and the locking structure; the first limiting component includes a first limiting post and a positioning groove, one of which is disposed in the locking structure and the other in the fixed base; the positioning groove is provided with at least two and is arranged at intervals along the axial direction of the rotating mechanism, and the first limiting post can be selectively inserted into one of the at least two positioning grooves to lock the locking structure to the fixed base.

[0012] Understandably, the first limiting component can lock the axial movement of the locking structure. Specifically, the first limiting post is inserted into the positioning groove, and the positioning groove and the first limiting post cooperate to form a lock. The structure is simple and easy to operate. The setting of at least two positioning grooves makes the locking of the axial movement of the locking structure more flexible, and facilitates the switching of the locking structure between the locked and unlocked positions.

[0013] In one embodiment, the fixing seat or the locking structure is provided with a receiving groove, and at least a portion of the first limiting post is inserted into the receiving groove; the first limiting component further includes a first elastic member, which is connected between the first limiting post and the groove wall of the receiving groove, for applying a force to the first limiting post to move out of the receiving groove.

[0014] It is understandable that the setting of the receiving groove facilitates the installation of the first limiting post and the first elastic member, and guides and limits the first elastic member; the first elastic member has a force that moves the first limiting post out of the receiving groove, which facilitates the reset of the first limiting post, so that the first limiting post can pop out of the receiving groove and cooperate with the limiting groove.

[0015] In one embodiment, the planing handpiece further includes a second limiting component connected between the rotating mechanism and the fixed base; the second limiting component includes a second limiting post and an arc-shaped groove, one of which is disposed in the rotating mechanism and the other in the fixed base, the arc-shaped groove extends circumferentially along the rotating mechanism, and a portion of the second limiting post is inserted into the arc-shaped groove for axially limiting the rotating mechanism.

[0016] It is understandable that the second limiting post and the arc-shaped groove can form a limiting fit along the axial direction of the rotating mechanism, so that the rotating mechanism is fixedly assembled in the fixed seat along the axial direction; at the same time, the arc-shaped groove provides clearance space for the circumferential rotation of the second limiting post, so as to avoid interference with the rotation of the rotating mechanism.

[0017] In one embodiment, the arcuate groove is disposed on the fixing base and communicates with the first mounting hole.

[0018] Understandably, this configuration, with the second limiting post positioned on the rotating mechanism, facilitates the smooth assembly of the rotating mechanism into the first assembly hole, preventing interference caused by the second limiting post being positioned on the fixed base during the assembly process.

[0019] In one embodiment, the fixing base is constructed with a recessed space that is radially recessed inward, and the locking structure is installed in the recessed space. The locking structure has a toggle end protruding from the side of the fixing base that is radially away from the fixing base.

[0020] Understandably, the locking structure is installed within the recessed space to prevent it from protruding radially from the fixed seat along the rotating mechanism, thus reducing space occupation, providing some protection for the locking structure, and also enhancing the overall aesthetics of the planing handpiece. The toggle end design facilitates manual operation, making it less strenuous to use.

[0021] In one embodiment, the rotating mechanism includes a rotating shaft, a rotating sleeve, and a first locking member; the rotating shaft is inserted into the first mounting hole and rotatably connected to the fixed base; the rotating sleeve is sleeved on the rotating shaft and can reciprocate along the axis of the rotating shaft; a clearance space is formed between the rotating sleeve and the rotating shaft; the rotating shaft is configured with a locking hole that can communicate with the clearance space; the first locking member is installed in the locking hole and configured to enter or exit the clearance space in response to the movement of the rotating sleeve; the first locking member can exit from the clearance space and partially protrude from the locking hole to lock the tool body.

[0022] Understandably, the rotating shaft facilitates the assembly of the tool body and cooperates with the rotating sleeve and the first locking member to lock the tool body. Specifically, the rotating sleeve and the rotating shaft form a clearance space, allowing the first locking member to enter the clearance space from the locking hole to release the lock on the tool body; the movement of the rotating sleeve can change the position of the first locking member relative to the clearance space, thereby switching the locking status of the tool body, making the operation simple.

[0023] In one embodiment, the rotating mechanism further includes a second elastic element connected between the rotating sleeve and the fixed base, for driving the rotating sleeve to move toward the side away from the fixed base, so that the first locking member disengages from the retraction space.

[0024] It is understandable that the second elastic element exerts a force on the rotating sleeve to move it away from the fixed seat, which is beneficial for the rotating sleeve to return to its original position after movement.

[0025] In one embodiment, the rotating mechanism further includes a stop structure sleeved on the rotating shaft, the stop structure being used to restrict the axial movement of the rotating sleeve.

[0026] Understandably, the stop structure can restrict the axial movement of the rotating sleeve and prevent the rotating sleeve from detaching from the rotating shaft along the axial direction.

[0027] In one embodiment, the rotating mechanism further includes a transmission member disposed between the rotating sleeve and the rotating shaft; the rotating shaft is configured with a transmission groove, and the transmission member is assembled in the transmission groove; along the circumferential direction of the rotating shaft, the transmission member is in a limiting fit with the groove wall of the transmission groove; the rotating sleeve is configured with a mating groove, and the mating groove extends axially along the rotating shaft; along the radial direction of the rotating shaft, the transmission member is pressed between the groove wall of the mating groove and the groove wall of the transmission groove.

[0028] Understandably, the transmission component and the transmission groove are in a limiting fit along the circumference of the rotating shaft. The power of the rotating sleeve's rotation can be transmitted to the rotating shaft through the transmission component, thereby driving the rotating shaft to rotate synchronously. The structure is simple and the operation is convenient. When assembling the tool body, since the rotating sleeve needs to move axially relative to the rotating shaft, the design of the mating groove ensures that the transmission component is located within the mating groove during the movement of the rotating sleeve and will not interfere with the movement of the rotating sleeve. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A partial structural schematic diagram of the planing handpiece provided in this application;

[0031] Figure 2 A partial cross-sectional view of the planing handpiece provided in this application;

[0032] Figure 3 A partial cross-sectional view of the planing handpiece provided in this application when it locks the tool body;

[0033] Figure 4 A partial cross-sectional view of the planing handpiece provided in this application when it unlocks the tool body;

[0034] Figure 5 A schematic diagram of the locking structure in the planing handpiece provided in this application;

[0035] Figure 6 This is a schematic diagram of the rotating shaft in the planing handpiece provided in this application.

[0036] Explanation of reference numerals in the attached drawings: 100, planing handpiece; 10, fixed base; 11, first mounting hole; 12, receiving groove; 13, recessed space; 14, connecting arm; 20, rotating mechanism; 201, retraction space; 21, rotating shaft; 211, second mounting hole; 212, locking hole; 213, transmission groove; 214, limiting groove; 215, first mounting groove; 22, rotating sleeve; 221, first sleeve body; 222, second... Sleeve body; 2201, mating groove; 23, first locking element; 24, second elastic element; 25, stop structure; 26, transmission element; 30, locking structure; 31, actuating end; 32, limiting hole; 33, positioning protrusion; 40, first limiting assembly; 41, first limiting post; 42, positioning groove; 43, first elastic element; 50, second limiting assembly; 51, second limiting post; 52, arc groove; 60, tool body. Detailed Implementation

[0037] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0038] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0039] In this document, spatial terms such as “upper” and “lower” are defined with reference to the accompanying drawings. Therefore, it will be understood that “upper” and “lower” are used interchangeably. It will be understood that when a layer is referred to as being “on” another layer, it can be formed directly on that other layer, or there may be intermediate layers. Therefore, it will be understood that when a layer is referred to as being “directly” on another layer, no intermediate layer is inserted in between.

[0040] In the accompanying drawings, the dimensions of layers and regions may be exaggerated for clarity. It is understood that when a layer or element is referred to as "on" another layer or substrate, the layer or element may be directly on said other layer or substrate, or there may be intermediate layers. Furthermore, it is understood that when a layer is referred to as "between" two layers, the layer may be the only layer between said two layers, or there may be one or more intermediate layers. Additionally, the same reference numerals always denote the same elements.

[0041] In the following embodiments, when a layer, region, or element is “connected,” it can be interpreted as the layer, region, or element being connected not only directly but also through other constituent elements placed therebetween. For example, when a layer, region, element, etc., is described as being connected or electrically connected, the layer, region, element, etc., can not only be directly connected or directly electrically connected, but can also be connected or electrically connected through another layer, region, element, etc., placed therebetween.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] Please see Figures 1 to 6 This application provides a planing handpiece 100, which includes a fixed base 10, a rotating mechanism 20, and a locking structure 30. The fixed base 10 provides support for the rotation of the rotating mechanism 20 and the movement of the locking structure 30. The rotating mechanism 20 can assemble a tool body 60 and drive the tool body 60 to rotate. The locking structure 30 can lock the rotating mechanism 20 after it rotates to the required angle, so that the tool body 60 is fixed at this angle for cutting. The entire planing handpiece 100 involves fewer parts. The rotating mechanism 20 drives the tool body 60 to rotate while also clamping the tool. There is no need to set up a separate clamping structure or equip it with a corresponding transmission component. The structure is relatively simple to manufacture, involves fewer fits, and has low precision requirements, thus making it easy to achieve mass production.

[0044] like Figure 2 As shown, the fixed base 10 further includes a first mounting hole 11; the rotating mechanism 20 is inserted into the first mounting hole 11 and has a second mounting hole 211 for inserting the tool body 60. The rotating mechanism 20 and the tool body 60 are detachably connected. Thus, the first mounting hole 11 facilitates the mounting of the rotating mechanism 20 and provides support and limitation for the rotating mechanism 20, allowing it to rotate stably within the first mounting hole 11. Simultaneously, the second mounting hole 211 facilitates the mounting of the tool body 60 onto the rotating mechanism 20 and provides limitation support for the tool body 60. The detachable connection between the rotating mechanism 20 and the tool body 60 facilitates the replacement of the tool body 60, allowing for the replacement of different tool bodies 60 according to actual needs, thus meeting diverse cutting requirements.

[0045] Furthermore, in combination Figures 2 to 6The locking structure 30 is movably connected to the fixed base 10 and has a locked position and an unlocked position. One of the locking structure 30 and the rotating mechanism 20 is provided with a limiting groove 214, and the other is provided with a positioning protrusion 33. At least one of the positioning protrusion 33 and the limiting groove 214 is provided with multiple protrusions and is arranged circumferentially along the rotating mechanism 20. In the locked position, the positioning protrusion 33 is inserted into the limiting groove 214 to lock the rotating mechanism 20 to the fixed base 10. In the unlocked position, the positioning protrusion 33 disengages from the limiting groove 214 to release the lock, and the rotating mechanism 20 can rotate relative to the fixed base 10 about its own axis.

[0046] Thus, locking is achieved through the limiting engagement of the limiting groove 214 and the positioning protrusion 33, resulting in a simple structure and convenient operation. The locking structure 30 is movably connected to the fixed base 10 to facilitate flexible switching between the locked and unlocked positions, making it easy to use. Specifically, when the locking structure 30 is moved to the locked position, the positioning protrusion 33 engages with the limiting groove 214 in a limiting engagement along the circumference of the rotating mechanism 20, thereby restricting the rotation of the rotating mechanism 20 and locking it; when the locking structure 30 is moved to the unlocked position, the positioning protrusion 33 disengages from the limiting groove 214, which means the limiting engagement along the circumference of the rotating mechanism 20 is removed, allowing the rotating mechanism 20 to rotate freely.

[0047] In some embodiments, the locking structure 30 is provided with a positioning protrusion 33 and the rotating mechanism 20 is provided with a limiting groove 214. This application will use this as an example for illustration. Of course, in other embodiments, the locking structure 30 may be provided with a limiting groove 214 and the rotating mechanism 20 may be provided with a positioning protrusion 33.

[0048] In some embodiments, multiple positioning protrusions 33 are provided, and one limiting groove 214 is provided. After the rotating mechanism 20 rotates by a certain angle, the limiting groove 214 engages with one of the corresponding positioning protrusions 33 for limiting engagement. Alternatively, multiple limiting grooves 214 can be provided, and one positioning protrusion 33 can be provided. After the rotating mechanism 20 rotates by a certain angle, the positioning protrusion 33 engages with one of the corresponding limiting grooves 214 for limiting engagement. This application uses this as an example. Alternatively, multiple positioning protrusions 33 and multiple limiting grooves 214 can be provided respectively. That is, multiple positioning protrusions 33 are arranged circumferentially along the rotating mechanism 20, and multiple limiting grooves 214 are arranged circumferentially along the rotating mechanism 20. After the rotating mechanism 20 rotates by a certain angle, each positioning protrusion 33 engages with its corresponding limiting groove 214 one by one.

[0049] In other words, the rotating mechanism 20 and the locking structure 30 are assembled and supported by the fixed seat 10. The rotating mechanism 20 can clamp the tool body 60 and drive the tool body 60 to rotate. The locking structure 30 locks or unlocks the rotating mechanism 20 through the cooperation of the limiting groove 214 and the positioning protrusion 33. The structure is simple, with few parts and low requirements for machining accuracy, which is conducive to promoting large-scale mass production.

[0050] like Figure 2 As shown, in an optional embodiment, the rotating mechanism 20 has an axial orientation, with the positioning protrusion 33 and the limiting groove 214 arranged opposite each other along the axial direction. The locking structure 30 is slidably connected to the fixed base 10 and can reciprocate along the axial direction to switch between the locked and unlocked positions. In this way, by moving the locking structure 30 axially, the positioning protrusion 33 can be inserted into or extended out of the limiting groove 214, facilitating the switching between the locked and unlocked positions and simplifying operation.

[0051] In other embodiments, the limiting groove 214 and the positioning protrusion 33 may be arranged radially opposite to each other along the rotating mechanism 20, and the locking structure 30 may be slidably connected to the fixed base 10 and be able to reciprocate radially along the rotating mechanism 20 to switch between the locked and unlocked positions. This is only an example.

[0052] like Figure 5 and Figure 6 As shown, in a specific embodiment, along the axial direction of the rotating mechanism 20, the limiting groove 214 gradually expands radially from the bottom of the limiting groove 214 towards the positioning protrusion 33. This design results in a larger opening in the limiting groove 214, facilitating the positioning of the positioning protrusion 33 and making it easier for the positioning protrusion 33 to be inserted into the limiting groove 214 from its opening. Furthermore, as the positioning protrusion 33 gradually extends into the limiting groove 214, the space within the limiting groove 214 gradually decreases, enhancing the limiting effect on the positioning protrusion 33.

[0053] like Figure 5 and Figure 6 As shown, in a more specific embodiment, the two opposite sides of the groove wall of the limiting groove 214 along the circumferential direction of the rotating mechanism 20 are respectively set as first inclined surfaces, and the positioning protrusion 33 is correspondingly provided with a matching second inclined surface. The first inclined surface can fit into the second inclined surface. Through the inclined surface cooperation, the positioning protrusion 33 can be guided during the insertion of the limiting groove 214, so that the positioning protrusion 33 can be self-adaptively assembled along the inclined direction of the first inclined surface. The dimensional accuracy requirements of the positioning protrusion 33 and the limiting groove 214 are not high, the processing is simpler, and it is conducive to large-scale production.

[0054] like Figure 2As shown, in an optional embodiment, one of the locking structure 30 and the fixing base 10 is provided with a connecting arm 14, and the other is provided with a limiting hole 32. The connecting arm 14 passes through the limiting hole 32 and can move axially within the limiting hole 32. Thus, the wall of the limiting hole 32 has a limiting effect on the connecting arm 14, ensuring that the connecting arm 14 can only move axially along the rotating mechanism 20. This restricts the rotation of the locking structure 30 relative to the fixing base 10, allowing the locking structure 30 to reciprocate stably along the rotating mechanism 20, improving movement stability. For example, the locking structure 30 is constructed with a limiting hole 32, and the fixing base 10 is constructed with a connecting arm 14; or, the locking structure 30 is constructed with a connecting arm, and the fixing base 10 is constructed with a limiting hole.

[0055] like Figure 2 As shown, in an optional embodiment, the planer 100 further includes a first limiting component 40 connected between the fixed base 10 and the locking structure 30, which locks the movement of the locking structure 30 along the axial direction of the rotating mechanism 20.

[0056] like Figure 2 and Figure 5 As shown, in a specific embodiment, the first limiting component 40 includes a first limiting post 41 and a positioning groove 42, one of which is disposed on the locking structure 30 and the other on the fixed base 10. At least two positioning grooves 42 are provided and spaced apart along the axial direction of the rotating mechanism 20. The first limiting post 41 can selectively engage with one of the at least two positioning grooves 42 to lock the locking structure 30 onto the fixed base 10. Thus, when the locking structure 30 moves axially along the rotating mechanism 20 to the locked position, the first limiting post 41 can engage with one of the positioning grooves 42 to keep the locking structure 30 fixed along the axial direction of the rotating mechanism 20; when the locking structure 30 moves axially along the rotating mechanism 20 to the unlocked position, the first limiting post 41 can engage with the other positioning groove 42 to fix the locking structure 30 in the unlocked position, avoiding interference with the rotation of the rotating mechanism 20. The method of engaging the positioning groove 42 with the first limiting post 41 results in a simple structure and convenient operation.

[0057] For example, the locking structure 30 is provided with a positioning groove 42, and the fixing seat 10 is provided with a first limiting post 41; or, the fixing seat 10 may be provided with a positioning groove 42, and the locking structure 30 may be provided with a first limiting post 41.

[0058] like Figure 2 As shown, in a specific embodiment, the fixing base 10 or the locking structure 30 is provided with a receiving groove 12, and at least a portion of the first limiting post 41 is inserted into the receiving groove 12. During the process of the locking structure 30 moving from one positioning groove 42 to another positioning groove 42, the first limiting post 41 can retract into the receiving groove 12.

[0059] In a specific embodiment, the first limiting post 41 can be a first ball bearing. With this configuration, the friction between the locking structure 30 and the first ball bearing is small when the locking structure 30 moves, which helps to extend its service life. When the locking structure 30 moves, the first ball bearing can easily exit from the positioning groove 42, making the movement of the locking structure 30 smoother. The locking structure 30 can be easily pushed with a small external force.

[0060] like Figure 2 As shown, in a further embodiment, the first limiting component 40 further includes a first elastic element 43, which is connected between the first limiting post 41 and the groove wall of the receiving groove 12, and is used to apply a force to the first limiting post 41 to move out of the receiving groove 12. Thus, the first elastic element 43 provides support and assists in resetting the first limiting post 41. Specifically, during the switching between the unlocking and locking positions of the locking structure 30, the locking structure 30 exerts a squeezing effect on the first limiting post 41, causing the first limiting post 41 to squeeze the first elastic element 43 and retract into the receiving groove 12. At this time, the first elastic element 43 exerts a reverse elastic force on the first limiting post 41. After the locking structure 30 has switched, the corresponding positioning groove 42 is positioned opposite to the receiving groove 12, and the first elastic element 43 can push the first limiting post 41 to reset. The first limiting post 41 then re-engages with another positioning groove 42, thereby again limiting and fixing the locking structure 30. For example, the first elastic element 43 can be a tension spring or a torsion spring.

[0061] like Figure 2 As shown, in some embodiments, the mounting base 10 is constructed with a recessed space 13 that is radially recessed, and the locking structure 30 is installed within the recessed space 13. This arrangement allows the recessed space 13 to accommodate and protect the locking structure 30, preventing it from protruding from the surface of the mounting base 10, reducing the possibility of accidental activation of the locking structure 30, and also reducing space occupation, making the planing handpiece 100 more aesthetically pleasing.

[0062] like Figure 2 and Figure 5 As shown, the locking structure 30 further has a toggle end 31 protruding from the side of the fixed base 10 in the radial direction away from the fixed base 10, so that the locking structure 30 can be touched by hand and pushed by the toggle end 31, which is more labor-saving and easier to operate.

[0063] like Figure 2 As shown, in an optional embodiment, the planer 100 further includes a second limiting component 50 connected between the rotating mechanism 20 and the fixed base 10. The second limiting component 50 can limit the axial movement of the rotating mechanism 20, so that the rotating mechanism 20 rotates only within the first mounting hole 11.

[0064] In a specific embodiment, the second limiting component 50 includes a second limiting post 51 and an arc-shaped groove 52. One of them is disposed on the rotating mechanism 20, and the other is disposed on the fixed base 10. The arc-shaped groove 52 extends circumferentially along the rotating mechanism 20, and a portion of the second limiting post 51 is inserted into the arc-shaped groove 52 for axial limiting of the rotating mechanism 20. Thus, the axial limiting of the rotating mechanism 20 can be achieved by the cooperation of the second limiting post 51 and the arc-shaped groove 52 along the axial direction of the rotating mechanism 20, resulting in a simple structure. The arc-shaped groove 52 provides space for the second limiting post 51 to rotate with the rotating mechanism 20, avoiding interference with the rotation of the rotating mechanism 20.

[0065] In a further embodiment, the arc-shaped groove 52 is provided on the fixed base 10 and communicates with the first assembly hole 11, and the second limiting post 51 is provided on the rotating mechanism 20. In this way, the rotating mechanism 20 can be smoothly inserted into the position of the first assembly hole 11 to the arc-shaped groove 52, which is conducive to the rapid positioning of the rotating mechanism 20 during the assembly process.

[0066] like Figures 2 to 4 As shown, in a specific embodiment, the second limiting post 51 and the rotating mechanism 20 are separately configured. The rotating mechanism 20 is provided with a first assembly groove 215, which is formed by a radial indentation from the surface of the rotating mechanism 20. The arc-shaped groove 52 communicates with the recessed space 13. In this way, the rotating mechanism 20 can be first assembled into the first assembly hole 11, with the first assembly groove 215 and the arc-shaped groove 52 facing each other. Then, the second limiting post 51 is passed through the arc-shaped groove 52 from the recessed space 13, so that the second limiting post 51 is installed into the first assembly groove 215. At the same time, part of the structure of the second limiting post 51 is located within the arc-shaped groove 52. Thus, the axial positioning of the rotating mechanism 20 and the fixed seat 10 is achieved. The separate configuration facilitates assembly, simplifies operation, and improves production efficiency.

[0067] like Figure 2 As shown, furthermore, when the locking structure 30 is in the locked position, the locking structure 30 covers the arc-shaped groove 52; when the locking structure 30 is in the unlocked position, the arc-shaped groove 52 is exposed in the recessed space 13. Therefore, when assembling the second limiting post 51, the locking structure 30 must first be moved from the locked position to the unlocked position.

[0068] In a specific embodiment, the second limiting post 51 can be a screw, which is screwed into the first assembly groove 215 to complete the assembly.

[0069] Next, the structure of the rotating mechanism 20 will be described.

[0070] like Figures 2 to 4As shown, in an optional embodiment, the rotating mechanism 20 includes a rotating shaft 21, a rotating sleeve 22, and a first locking member 23. By moving the rotating sleeve 22 relative to the rotating shaft 21, the state of the first locking member 23 is changed, thereby locking or unlocking the tool body 60. The structure is simple, requires few components, and is easy to operate.

[0071] like Figure 2 As shown, specifically, the rotating shaft 21 is inserted into the first mounting hole 11 and rotatably connected to the fixed base 10, and the rotating sleeve 22 is sleeved on the rotating shaft 21. Correspondingly, the rotating shaft 21 is provided with a second mounting hole 211 for mounting the tool body 60, and the rotating sleeve 22 can transmit external force to the rotating shaft 21 to realize the rotation of the rotating shaft 21, thereby driving the tool body 60 to rotate.

[0072] like Figures 2 to 4 As shown, the rotating sleeve 22 is capable of reciprocating along the axis of the rotating shaft 21. A clearance space 201 is formed between the rotating sleeve 22 and the rotating shaft 21. The rotating shaft 21 is equipped with a locking hole 212, which communicates with the clearance space 201. A first locking member 23 is installed in the locking hole 212 and configured to enter or exit the clearance space 201 in response to the movement of the rotating sleeve 22. The first locking member 23 can exit from the clearance space 201 and partially protrude from the locking hole 212 to lock the tool body 60. The clearance space 201 is provided so that the first locking member 23 can be accommodated during the removal of the tool body 60, thereby allowing the first locking member 23 to release the lock on the tool body 60. The locking hole 212 restricts the radial movement of the first locking member 23 along the locking hole 212, while guiding the first locking member 23 to move along the hole wall of the locking hole 212, preventing the first locking member 23 from shaking when locking the tool body 60, and ensuring the stability of the lock.

[0073] like Figure 4 As shown, specifically, when the rotating sleeve 22 moves axially toward the fixed seat 10 along the rotating shaft 21 until the retraction space 201 and the locking hole 212 are radially opposite each other along the rotating shaft 21, the first locking member 23 can enter into the retraction space 201, thereby releasing the lock on the tool body 60. Figure 3 As shown, when the rotating sleeve 22 moves away from the fixed seat 10 along the rotating shaft 21 to the point where the retraction space 201 is misaligned with the locking hole 212, the rotating sleeve 22 presses the first locking member 23 out of the retraction space 201 and causes part of the structure of the first locking member 23 to extend out of the locking hole 212 to lock the tool body 60.

[0074] During actual assembly, the tool body 60 is constructed with a mating groove that engages with the first locking member 23. First, the rotating sleeve 22 is moved along the axis of the rotating shaft 21 toward the fixed seat 10. Then, the tool body 60 is inserted into the second assembly hole 211. The tool body 60 pushes the first locking member 23 toward the retraction space 201. After the tool body 60 is assembled to the fixed position, the rotating sleeve 22 moves away from the fixed seat 10 along the axis of the rotating shaft 21. Under the pressure of the rotating sleeve 22, the first locking member 23 is expelled from the retraction space 201 and engages with the mating groove of the tool body 60 to lock the tool body 60.

[0075] In some embodiments, the first locking member 23 is configured as a second ball, the smooth surface of which can reduce friction and help protect the tool body 60.

[0076] like Figure 2 As shown, in some embodiments, the diameter of the locking hole 212 gradually expands radially from the second assembly hole 211 toward the rotating sleeve 22 along the rotation axis 21, so that the hole wall of the locking hole 212 forms an inclined limiting surface, which has a limiting effect on the first locking member 23 along the rotation axis 21, preventing the first locking member 23 from falling out of the locking hole 212.

[0077] like Figures 2 to 4 As shown, in a specific embodiment, the rotating sleeve 22 is constructed with an abutting slope facing the locking hole 212 to facilitate engagement with the second ball, so that the second ball exits from the relief space 201 under the abutting and guiding action of the abutting slope, making the movement of the rotating sleeve 22 smoother.

[0078] like Figures 2 to 4 As shown, in an optional embodiment, the rotating mechanism 20 further includes a second elastic element 24 connected between the rotating sleeve 22 and the fixed base 10. The second elastic element 24 drives the rotating sleeve 22 to move toward the side away from the fixed base 10, so that the first locking element 23 exits the retraction space 201. With this configuration, the second elastic element 24 helps the rotating sleeve 22 to reset, so that after the tool body 60 is inserted into the second mounting hole 211, the rotating sleeve 22 can automatically reset under the action of elastic force, thereby pressing the first locking element 23 and causing the first locking element 23 to exit from the retraction space 201.

[0079] like Figures 2 to 4 As shown, in an optional embodiment, the rotating mechanism 20 further includes a transmission member 26 disposed between the rotating sleeve 22 and the rotating shaft 21. The rotating sleeve 22 transmits the rotational power to the rotating shaft 21 through the transmission member 26, thereby driving the rotating shaft 21 to rotate.

[0080] like Figures 2 to 4As shown, in a further embodiment, the rotating shaft 21 is constructed with a transmission groove 213, and a transmission component 26 is assembled in the transmission groove 213; along the circumference of the rotating shaft 21, the transmission component 26 is in a limiting fit with the groove wall of the transmission groove 213. In this way, the transmission component 26 can transmit force to the groove wall of the transmission groove 213, thereby driving the rotation of the rotating shaft 21. The structure is simple and easy to process.

[0081] like Figures 2 to 4 As shown, in a further embodiment, the rotating sleeve 22 is constructed with a mating groove 2201, which extends axially along the rotating shaft 21. Radially along the rotating shaft 21, the transmission member 26 is pressed between the groove wall of the mating groove 2201 and the groove wall of the transmission groove 213. With this configuration, the rotating sleeve 22 transmits force to the transmission member 26 through the groove wall of the mating groove 2201, and then the transmission member 26 transmits it to the rotating shaft 21. Since the rotating sleeve 22 needs to move axially along the rotating shaft 21 to lock and unlock the tool body 60, the mating groove 2201 provides clearance for the movement of the rotating sleeve 22, preventing the transmission member 26 from obstructing the axial movement of the rotating sleeve 22.

[0082] In a specific embodiment, the transmission component 26 can be configured as a third ball, which can reduce the friction between the ball and the groove wall of the mating groove 2201 and facilitate the smooth movement of the rotating sleeve 22.

[0083] like Figures 2 to 4 As shown, in an optional embodiment, the rotating mechanism 20 further includes a stop structure 25, which is sleeved on the rotating shaft 21 and is used to restrict the axial movement of the rotating sleeve 22. Specifically, when the rotating sleeve 22 moves along the axis of the rotating shaft 21 toward the fixed seat 10, the stop structure 25 restricts its movement distance to prevent the rotating sleeve 22 from moving to the point of disengaging from the first locking member 23; when the rotating sleeve 22 is reset under the action of the second elastic member 24, the stop structure 25 stops the rotating sleeve 22 to prevent the rotating sleeve 22 from moving to the point of disengaging from the transmission member 26.

[0084] like Figures 2 to 4 As shown, in a specific embodiment, the stop structure 25 is disposed within the relief space 201, and the rotating sleeve 22 is provided with a first abutment surface and a second abutment surface spaced apart along the axial direction of the rotation axis 21 within the relief space 201. When the rotating sleeve 22 moves axially toward the fixed base 10 along the rotation axis 21, the stop structure 25 is limited to the first abutment surface; when the rotating sleeve 22 moves axially away from the fixed base 10 along the rotation axis 21, the stop structure 25 is limited to the second abutment surface. This achieves the limiting effect on the reciprocating movement of the rotating sleeve 22 along the rotation axis 21. For example, the stop structure 25 is threadedly connected to the rotation axis 21.

[0085] like Figures 2 to 4As shown, in a specific embodiment, the rotating sleeve 22 includes a first sleeve body 221 and a second sleeve body 222. The first sleeve body 221 is sleeved on the second sleeve body 222, and the two are detachably connected, for example, by threaded connection, interference fit, etc. The second sleeve body 222 is sleeved on the rotating shaft 21 and is constructed with the aforementioned mating groove 2201. Furthermore, the second elastic member 24 is connected between the second sleeve body 222 and the fixed seat 10.

[0086] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0087] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A planing handpiece, comprising a tool body, characterized in that, include: The fixing base (10) is provided with a first mounting hole (11); A rotating mechanism (20) is inserted into the first mounting hole (11) and a second mounting hole (211) is provided for inserting the tool body. The rotating mechanism (20) is detachably connected to the tool body. The locking structure (30) is movably connected to the fixed base (10) and has a locked position and an unlocked position; One of the locking structure (30) and the rotating mechanism (20) is provided with a limiting groove (214), and the other is provided with a positioning protrusion (33). At least one of the positioning protrusion (33) and the limiting groove (214) is provided with a plurality of them and arranged along the circumference of the rotating mechanism (20). In the locked position, the positioning protrusion (33) is inserted into the limiting groove (214) to lock the rotating mechanism (20) to the fixed seat (10); in the unlocked position, the positioning protrusion (33) disengages from the limiting groove (214) to release the lock, and the rotating mechanism (20) can rotate relative to the fixed seat (10) about its own axis.

2. The planing handpiece according to claim 1, characterized in that, The rotating mechanism (20) has an axial direction, the positioning protrusion (33) and the limiting groove (214) are arranged opposite to each other along the axial direction, the locking structure (30) is slidably connected to the fixed seat (10) and can reciprocate along the axial direction to switch the locked position and the unlocked position.

3. The planing handpiece according to claim 2, characterized in that, One of the locking structure (30) and the fixing base (10) is provided with a connecting arm (14), and the other is provided with a limiting hole (32). The connecting arm (14) passes through the limiting hole (32) and can move along the axial direction within the limiting hole (32).

4. The planing handpiece according to claim 1, characterized in that, The planing handpiece also includes a first limiting component (40) connected between the fixed base (10) and the locking structure (30); The first limiting component (40) includes a first limiting post (41) and a positioning groove (42), one of which is provided in the locking structure (30) and the other is provided in the fixed seat (10); the positioning groove (42) is provided with at least two and is arranged at intervals along the axial direction of the rotating mechanism (20); the first limiting post (41) can be selectively inserted into one of the at least two positioning grooves (42) to lock the locking structure (30) in the fixed seat (10).

5. The planing handpiece according to claim 4, characterized in that, The fixing seat (10) or the locking structure (30) is provided with a receiving groove (12), and at least a portion of the first limiting post (41) is inserted into the receiving groove (12). The first limiting component (40) further includes a first elastic element (43), which is connected between the first limiting post (41) and the groove wall of the receiving groove (12) and is used to apply a force to the first limiting post (41) to move out of the receiving groove (12).

6. The planing handpiece according to claim 1, characterized in that, The planing handpiece also includes a second limiting component (50) connected between the rotating mechanism (20) and the fixed base (10); The second limiting component (50) includes a second limiting post (51) and an arc-shaped groove (52), one of which is disposed on the rotating mechanism (20) and the other is disposed on the fixed base (10). The arc-shaped groove (52) extends circumferentially along the rotating mechanism (20). A portion of the second limiting post (51) is inserted into the arc-shaped groove (52) for axially limiting the rotating mechanism (20).

7. The planing handpiece according to claim 6, characterized in that, The arc-shaped groove (52) is provided on the fixed base (10) and communicates with the first assembly hole (11).

8. The planing handpiece according to claim 1, characterized in that, The fixing seat (10) is constructed with a recessed space (13) that is recessed inward along its own radial direction. The locking structure (30) is installed in the recessed space (13). The locking structure (30) has a toggle end (31) protruding on the side of the fixing seat (10) that is radially away from the fixing seat (10).

9. The planing handpiece according to any one of claims 1 to 8, characterized in that, The rotating mechanism (20) includes a rotating shaft (21), a rotating sleeve (22), and a first locking member (23); The rotating shaft (21) is inserted into the first mounting hole (11) and rotatably connected to the fixed base (10). The rotating sleeve (22) is sleeved on the rotating shaft (21) and can reciprocate along the axis of the rotating shaft (21). A clearance space (201) is formed between the rotating sleeve (22) and the rotating shaft (21). The rotating shaft (21) is constructed with a locking hole (212), and the locking hole (212) can communicate with the clearance space (201). The first locking member (23) is mounted in the locking hole (212) and configured to enter or exit the retraction space (201) in response to the movement of the rotating sleeve (22). The first locking member (23) is capable of exiting the retraction space (201) and partially extending out of the locking hole (212) to lock the tool body.

10. The planing mobile phone according to claim 9, characterized in that, The rotating mechanism (20) further includes a second elastic element (24), which is connected between the rotating sleeve (22) and the fixed seat (10) to drive the rotating sleeve (22) to move toward the side away from the fixed seat (10) so that the first locking element (23) exits the retraction space (201).

11. The planing handpiece according to claim 10, characterized in that, The rotating mechanism (20) further includes a stop structure (25), which is sleeved on the rotating shaft (21) and is used to restrict the axial movement of the rotating sleeve (22).

12. The planing handpiece according to claim 10, characterized in that, The rotating mechanism (20) further includes a transmission component (26) disposed between the rotating sleeve (22) and the rotating shaft (21); The rotating shaft (21) is constructed with a transmission groove (213), and the transmission member (26) is assembled in the transmission groove (213); along the circumference of the rotating shaft (21), the transmission member (26) is in a limiting fit with the groove wall of the transmission groove (213); The rotating sleeve (22) is constructed with a mating groove (2201) which extends axially along the rotating shaft (21); along the radial direction of the rotating shaft (21), the transmission member (26) is pressed between the groove wall of the mating groove (2201) and the groove wall of the transmission groove (213).

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