CN113749795A - Dental handpiece and handpiece thereof - Google Patents
Dental handpiece and handpiece thereof Download PDFInfo
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- CN113749795A CN113749795A CN202111203312.9A CN202111203312A CN113749795A CN 113749795 A CN113749795 A CN 113749795A CN 202111203312 A CN202111203312 A CN 202111203312A CN 113749795 A CN113749795 A CN 113749795A
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- handpiece
- magnet
- stator
- needle clamping
- housing
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C3/00—Dental tools or instruments
- A61C3/02—Tooth drilling or cutting instruments; Instruments acting like a sandblast machine
- A61C3/025—Instruments acting like a sandblast machine, e.g. for cleaning, polishing or cutting teeth
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
- A61C1/08—Machine parts specially adapted for dentistry
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
- A61C1/08—Machine parts specially adapted for dentistry
- A61C1/14—Tool-holders, i.e. operating tool holders, e.g. burr holders
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
- A61C1/08—Machine parts specially adapted for dentistry
- A61C1/18—Flexible shafts; Clutches or the like; Bearings or lubricating arrangements; Drives or transmissions
- A61C1/181—Bearings or lubricating arrangements, e.g. air-cushion bearings
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- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The invention provides a dental handpiece and a handpiece thereof, relating to the technical field of oral medical instruments, wherein a stator and a magnet are arranged in a handpiece shell, a root canal file is arranged in a needle clamping assembly from a first end of the handpiece shell, then the stator is directly electrified, the stator can generate a variable magnetic field to enable the magnet to rotate around a preset axis, the magnet drives the needle clamping assembly to rotate around the preset axis, and then the needle clamping assembly can drive the root canal file clamped by the magnet to rotate around the preset axis, compared with the prior art, a separate driving motor is not needed as a driving source, intermediate transmission structures such as a transmission gear, a transmission shaft and the like are not needed, the number of parts is greatly reduced, the whole size of the dental handpiece can be reduced, the structure is complex, the whole weight is light, the production flow is short, the processing is simple, and meanwhile, the magnet is separated from the stator and is not easy to wear, the assembly requirement is low, and the total cost is low.
Description
Technical Field
The invention relates to the technical field of oral medical instruments, in particular to a dental handpiece and a handpiece thereof.
Background
The dental handpiece is mainly used for grinding, polishing and cutting in dental surgery, and the existing production process of the dental handpiece has a plurality of problems to be solved: the existing mainstream dental handpiece adopts a driving motor as a driving source, and then utilizes a gear and a transmission shaft for transmission, so that the number of parts is as large as 25 or more, the structure is complex, the whole quality is heavier, in addition, the production flow is long, the gear is difficult to machine, the easy-abrasion machining cost is high, the assembly requirement is high, the carbon emission is difficult to reduce, and the total cost is high.
Disclosure of Invention
The invention aims to provide a dental handpiece and a handpiece thereof, which do not need a separate driving motor as a driving source, do not need intermediate transmission structures such as a transmission gear, a transmission shaft and the like, greatly reduce the number of parts, reduce the overall size of the dental handpiece, have complex structure, light overall weight, short production flow and simple processing, are not easy to wear because of the interval between a magnet and a stator, have low assembly requirement and low total cost.
In a first aspect, the present invention provides a handpiece for a dental handpiece, comprising:
a handpiece housing open at a first end on a preset axis;
the needle clamping assembly is arranged in the handpiece shell;
the magnet is sleeved outside the needle clamping assembly and used for driving the needle clamping assembly to rotate around the preset axis;
the stator is circumferentially arranged on the inner circumferential surface of the handpiece shell, is spaced from the magnet and is used for generating a variable magnetic field so as to drive the magnet to rotate around the preset axis.
In an alternative embodiment, the stator comprises a plurality of stator cores which are circumferentially arranged on the inner circumferential surface of the handpiece shell at equal intervals, and a coil wound by each stator core;
the handpiece of the dental handpiece further comprises position sensors which are arranged in the handpiece shell and correspond to the stator cores one to one, the position sensors are used for detecting the position information of the magnets and transmitting the position information to the controller, and the controller can respectively control the energization and the de-energization of the coils according to the change of the position information.
In an alternative embodiment, the position sensor is a magnetic sensor and is configured to send a first signal when detecting an N pole of the magnet and send a second signal when detecting an S pole of the magnet, and the controller is specifically configured to determine a change in the position information according to a change in the first signal and the second signal to control the energization or the de-energization of the plurality of coils, respectively.
In an alternative embodiment, the stator includes three of the stator cores, the magnet has two poles, and the stator, the magnet, and the position sensor together constitute a three-phase two-pole inner rotor brushless motor.
In an alternative embodiment, the clip assembly comprises:
a needle clamping elastic sheet;
the shaft core is sleeved outside the needle clamping elastic sheet; the magnet is sleeved outside the shaft core and used for driving the shaft core to rotate around the preset axis, so that the needle clamping elastic sheet rotates around the preset axis.
In an alternative embodiment, the handpiece housing is open at a second end of the preset axis;
the handpiece of the dental handpiece also comprises a rear cover assembly, and the rear cover assembly comprises a rear cover and a support body;
the support body is provided with a through hole which axially extends along the preset axis and is arranged at the second end of the handpiece shell;
the back cover is arranged on one side, which is far away from the supporting body, of the supporting body and is spaced from the needle clamping elastic sheet, wherein the back cover can move towards the first end of the handpiece shell under the action of external force to contact the needle clamping elastic sheet and enable the needle clamping elastic sheet to expand.
In an alternative embodiment, a convex pressing part is arranged on one side of the rear cover close to the handpiece shell;
the clip needle shell fragment includes coaxial coupling's closed section and ring-opening section, the ring-opening section for the closed section is kept away from the first end of aircraft nose casing, it has a plurality of edges to open the ring section predetermine the fluting that the axis direction extends, it deviates from to open the ring section the one end of closed section is equipped with stirring portion, stirring portion extends to press the peripheral edges of splenium, just stirring portion is close to predetermine the surface of axis with press the outer peripheral face looks interval of splenium, wherein, the back lid can contact and extrusion under the exogenic action stirring portion, so that stirring portion is to keeping away from predetermine the direction skew of axis.
In an optional embodiment, a raised pressing part is arranged on one side of the rear cover close to the handpiece shell, and the handpiece of the dental handpiece further comprises a pressing piece opposite to and spaced from the pressing part;
the needle clamping elastic sheet comprises a closed section and an open ring section which are coaxially connected, the open ring section is far away from the first end of the handpiece shell relative to the closed section, and the open ring section is provided with at most two slots extending along the direction of the preset axis;
the pressing piece is provided with expansion bulges in one-to-one correspondence with the slots, the expansion bulges are arranged along the direction from the first end to the second end of the handpiece shell, the outer diameter of the expansion bulges is gradually increased, and the rear cover can enable each expansion bulge to be clamped into the corresponding slot under the action of external force, so that the distance between the slots is increased.
In a second aspect, the present invention provides a dental handpiece comprising a handpiece of any one of the preceding embodiments and a body housing, wherein the handpiece housing is attached to a first end of the body housing.
In an optional embodiment, the dental handpiece further includes a plug and a snap ring, the plug is inserted into the second end of the body housing and electrically connected to the stator, and the snap ring is connected to the second end of the body housing and abuts against the plug.
In the dental handpiece and the handpiece thereof provided by the embodiment of the invention, the stator and the magnet are arranged in the handpiece shell, the root canal file is arranged from the first end of the handpiece shell to the needle clamping assembly, then the stator is directly electrified, the stator can generate a variable magnetic field to enable the magnet to rotate around a preset axis, the magnet drives the needle clamping assembly to rotate around the preset axis, and then the needle clamping component can drive the root canal file clamped by the needle clamping component to rotate around the preset axis, compared with the prior art, the single driving motor is not needed to be used as a driving source, and intermediate transmission structures such as a transmission gear, a transmission shaft and the like are not needed, the number of parts is greatly reduced, the overall size of the dental handpiece can be reduced, the structure is complex, the overall weight is light, the production flow is short, the processing is simple, meanwhile, the magnet and the stator are separated, so that the abrasion is not easy to occur, the assembly requirement is low, and the total cost is low.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic longitudinal cross-sectional view of a dental handpiece in accordance with a first embodiment of the present invention;
FIG. 2 is an enlarged view of portion B of FIG. 1;
FIG. 3 is an enlarged view of portion A of FIG. 1;
FIG. 4 is a schematic perspective view of a first embodiment of the present invention after a handpiece has been blanked from a handpiece housing and a rear cover assembly;
FIG. 5 is a schematic cross-sectional view of a first embodiment handpiece of the present invention;
FIG. 6 is an exploded view of the clip assembly and the rear cover assembly of the first embodiment of the present invention;
FIG. 7 is a schematic longitudinal cut view of the rear cover assembly and the clip spring according to the first embodiment of the present invention;
FIG. 8 is a perspective view of a rear cover assembly and a clip leaf spring according to a second embodiment of the present invention;
fig. 9 is a longitudinal cut view of the rear cover assembly and the clip spring according to the second embodiment of the present invention.
Icon: 1-machine head; 10-a handpiece housing; 101-a first bearing; 103-a second bearing; 12-a needle clip assembly; 121-a clip spring; 1210-a closing section; 1212-ring opening segment; 1214-slotting; 1216-toggle; 1218-limit projection; 123-axial core; 14-a stator core; 15-a position sensor; 16-a magnet; 3-a fuselage shell; 5-a plug; 50-an annular groove; 7-a snap ring; 70-a connecting part; 72-a holding portion; 8-pressing piece; 80-expansion bulge; 9-a rear cover assembly; 90-a support; 92-a rear cover; 921-pressing part; 94-an elastic member; 96-bearing seats; 961-support portion.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
First embodiment
Referring to fig. 1 and 2, an embodiment of the invention provides a dental handpiece, which includes a body housing 3, a plug 5, a snap ring 7 and a handpiece 1, wherein the handpiece housing 10 is connected to a first end of the body housing 3, the plug 5 is inserted into a second end of the body housing 3 and electrically connected to the handpiece 1, and the snap ring 7 is connected to the second end of the body housing 3 and abuts against the plug 5 to fix the plug 5. The inner peripheral surface of the second end of the body housing 3 is provided with an annular groove 50, the snap ring 7 comprises a connecting portion 70 and a supporting portion 72 which are coaxially connected, the supporting portion 72 extends inwards along the radial direction of the connecting portion 70 from the inner peripheral surface of one end of the connecting portion 70, therefore, after the plug 5 is inserted into the body from the second end of the body housing 3, the connecting portion 70 of the snap ring 7 is matched with the annular groove 50, the supporting portion 72 of the snap ring 7 is supported with the plug 5 to limit the axial movement of the plug 5, wherein the matching mode of the connecting portion 70 and the groove can be threaded matching, namely, the outer peripheral surface of the connecting portion 70 is provided with an external thread, and the inner peripheral surface of the annular groove 50 is provided with an internal thread matched with the external thread.
Referring to fig. 3-5, handpiece 1 includes handpiece housing 10, needle holder assembly 12, magnet 16, and a stator. The aircraft nose casing 10 is connected in the first end of fuselage casing 3, and the axis of this aircraft nose casing 10 with predetermine the axis coincidence, aircraft nose casing 10 is open at the first end on predetermineeing the axis, wherein, predetermine the axis and be the contained angle with the length extending direction of fuselage casing 3. Disposed within handpiece housing 10 is a needle assembly 12. The magnet 16 is sleeved outside the needle clamping assembly 12 and used for driving the needle clamping assembly 12 to rotate around a preset axis. The stator is electrically connected with the plug 5, and the stator is circumferentially arranged on the inner circumferential surface of the handpiece shell 10 and is spaced from the magnet 16 to generate a variable magnetic field so as to drive the magnet 16 to rotate around a preset axis.
Therefore, through arranging the stator and the magnet 16 in the handpiece shell 10, the root canal file is arranged in the needle clamping assembly 12 from the first end of the handpiece shell 10, and then the stator is directly electrified, the stator can generate a variable magnetic field to enable the magnet 16 to rotate around a preset axis, the magnet 16 drives the needle clamping assembly 12 to rotate around the preset axis, and then the needle clamping assembly 12 can drive the root canal file clamped by the magnet to rotate around the preset axis.
The stator includes a plurality of stator cores 14 circumferentially disposed at equal intervals on the inner peripheral surface of the head housing 10, and a coil wound by each stator core 14. The handpiece 1 of the dental handpiece further comprises a position sensor 15 which is arranged in the handpiece shell 10 and corresponds to the stator cores 14 one by one, the position sensor 15 is used for detecting the position information of the magnet 16 and transmitting the position information to the controller, and the controller can respectively control the energization and the de-energization of the plurality of coils according to the change of the position information, so that the stator can generate a changing magnetic field.
The principle of how to energize the coils to rotate the magnet 16 is substantially the same as that of the brushless dc motor in the prior art, and redundant description is omitted here, but in this embodiment, the position sensor 15 is a magnetic sensor, and is specifically configured to send a first signal when detecting the N pole of the magnet 16, and send a second signal when detecting the S pole of the magnet 16, and the controller is specifically configured to determine the change of the position information according to the change of the first signal and the second signal, so as to control energization or deenergization of the plurality of coils, respectively. Wherein the stator comprises three stator cores 14, the magnet 16 has two magnetic poles, and the stator, the magnet 16 and the position sensor together form a three-phase two-pole inner rotor brushless motor.
The controller may be disposed in the body housing 3, and is generally a Central Processing Unit (CPU), and may be configured with a corresponding operating system, a control interface, and the like, and specifically may be a Digital logic control Unit such as a single chip microcomputer, a DSP (Digital Signal Processing), an ARM (Advanced RISC machine, ARM processor), and the like, which can be used for automatic control, and may load a control instruction to a memory at any time for storage and execution, and at the same time, may have a CPU instruction and a data memory, an input/output Unit, a power module, a Digital analog Unit, and the like built-in Unit, and may be specifically set according to an actual use condition, which is not limited in this embodiment of the present invention.
Referring to fig. 3, 6 and 7, the needle clamping assembly 12 includes a needle clamping elastic sheet 121 and a shaft core 123, the needle clamping elastic sheet 121 is used for clamping a needle, the needle clamping elastic sheet 121 is tubular, and the axis of the needle clamping elastic sheet 121 coincides with a preset axis, so that when the needle is inserted into the needle clamping elastic sheet 121 from the first end of the handpiece housing 10 and is clamped by the needle clamping elastic sheet 121, the axis of the needle coincides with the preset axis. The shaft core 123 is also tubular and is sleeved outside the needle clamping elastic sheet 121, and the axis of the shaft core 123 is superposed with the preset axis; the magnet 16 is sleeved outside the shaft core 123, the axis is coincident with the preset axis, and the magnet 16 is used for driving the shaft core 123 to rotate around the preset axis under the action of a variable magnetic field generated by the stator, so that the needle clamping elastic sheet 121 rotates around the preset axis, and further, the lathe needle clamped by the needle clamping elastic sheet 121 rotates around the preset axis.
The handpiece housing 10 is open at a second end of the preset axis. The handpiece 1 further includes a back cover assembly 9, and the back cover assembly 9 includes a back cover 92 and a support body 90. The support body 90 is annular and is provided with a through hole extending along the preset axis in the axial direction, and the support body 90 is arranged at the second end of the handpiece shell 10. The rear cover 92 is disposed on a side of the supporting body 90 away from the supporting body 90 and spaced apart from the needle-clamping resilient piece 121, wherein the rear cover 92 can move toward the first end of the handpiece housing 10 under the action of an external force to contact the needle-clamping resilient piece 121 and expand the needle-clamping resilient piece 121.
Further, the rear cover assembly 9 further includes an elastic member 94. The inner circumferential surface of the support body 90 is provided with a support portion 961 extending inward in the radial direction of the support body 90, the support portion 961 having a ring shape. The elastic member 94 is abutted between the rear cover 92 and the support portion 961. One side of the rear cover 92 close to the handpiece housing 10 is provided with a convex pressing part 921.
The needle clamping spring piece 121 comprises a closed section 1210 and an open-loop section 1212 which are coaxially connected, the open-loop section 1212 is far away from the first end of the handpiece shell 10 relative to the closed section 1210, the open-loop section 1212 is provided with a plurality of slots 1214 extending along the preset axis direction, one end of the open-loop section 1212 departing from the closed section 1210 is provided with a toggle portion 1216, the toggle portion 1216 extends to the outer peripheral edge of the pressing portion 921, the surface of the toggle portion 1216 close to the preset axis is spaced from the outer peripheral surface of the pressing portion 921, wherein the rear cover 92 can contact and extrude the toggle portion 1216 under the external force, so that the toggle portion 1216 is deviated from the direction far away from the preset axis. In addition, since the elastic member 94 is abutted between the rear cover 92 and the pressing groove, when the rear cover 92 is moved toward the first end of the handpiece housing 10 by an external force, the rear cover 92 presses the elastic member 94, so that the elastic member 94 is compressed.
More specifically, the pressing portion 921 is circular, a side of the toggle portion 1216 close to the predetermined axis is an inner surface, a generatrix of the inner surface is an arc-shaped line segment, and a curvature center of the arc-shaped line segment is located on a side of the toggle portion 1216 away from the predetermined axis, so as to ensure that when the rear cover 92 moves towards the first end of the handpiece housing 10 under the action of an external force, the elastic member 94 is compressed, an outer peripheral edge of the pressing portion 921 gradually approaches the inner surface of the toggle portion 1216 and contacts with the inner surface of the toggle portion 1216, the toggle portion 1216 elastically deforms and deflects towards a direction away from the predetermined axis along with the movement of the rear cover 92, and then the rear cover 92 moves to a proper position, at this time, the root canal file can penetrate the file clip spring 121 from the first end of the handpiece housing 10, after the depth of the file entering the file clip spring 121 reaches the proper position, the application of the rear cover 92 is stopped, so that the rear cover 92 moves towards a direction away from the first end of the handpiece housing 10 under the resilient action of the elastic member 94, such that the pressing portion 921 gradually disengages from the dial portion 1216 so that the dial portion 1216 springs back to grip the file.
Wherein, the elastic member 94 can be a coil spring, a bellows, etc. capable of generating elastic deformation, and is a tubular element made of elastic material, and the elastic member 94 surrounds the pressing portion 921 and the poking portion 1216 at the outer side. The radius of curvature of the arcuate line segment increases gradually in the direction from the first end to the second end of the handpiece housing 10. The number of the striking parts 1216 may be one or more than two, and when the number of the striking parts 1216 is more than two, the striking parts 1216 are equally spaced in the circumferential direction. The stirring portion 1216 is further provided with a limiting protrusion 1218 which extends inwards, and the limiting protrusion 1218 is used for being matched with a limiting recess formed in the outer peripheral surface of the root canal file so as to strengthen the clamping force of the needle clamping elastic sheet 121 on the root canal file and ensure the stability of the root canal file when being clamped.
In this embodiment, the handpiece 1 further includes a first bearing 101 and a second bearing 103, the first bearing 101 is disposed at a first end in the handpiece housing 10, the second bearing 103 is disposed at a second end in the handpiece housing 10, axes of the first bearing 101 and the second bearing 103 are both coincident with a preset axis, the needle clamping assembly 12 is disposed in the first bearing 101 and the second bearing 103, that is, a first end of the shaft core 123 is disposed in the first bearing 101, a second end of the shaft core 123 is disposed in the second bearing 103, and the stator and the magnet 16 are both located between the first bearing 101 and the second bearing 103. Therefore, the first bearing 101 and the second bearing 103 play a role in improving the rotation precision of the needle clamping assembly 12 and ensuring smooth rotation of the needle clamping assembly 12.
In addition, the rear cover assembly 9 further includes a bearing seat 96, the bearing seat 96 is annular and is disposed between the second end of the handpiece housing 10 and the support body 90, specifically, the outer circumferential surface of the bearing seat 96 is provided with an external thread, and the inner circumferential surface of the second end of the handpiece housing 10 is provided with an internal thread, so that the bearing seat 96 and the handpiece housing 10 are connected by threaded engagement. The outer peripheral surface of the bearing housing 96 is partially located outside the handpiece housing 10, and the inner peripheral surface of the bearing housing 96 is provided with the above-described support portion 961. The inner circumferential surface of the support body 90 is also provided with an internal thread, whereby the connection of the support body 90 and the bearing housing 96 is achieved by the threaded engagement of the support body 90 with the portion of the bearing housing 96 located outside the handpiece housing 10.
To sum up, in the dental handpiece and the handpiece 1 thereof according to the embodiment of the present invention, the stator and the magnet 16 are disposed in the handpiece housing 10, the root canal file is loaded into the needle clamping assembly 12 from the first end of the handpiece housing 10, and then the stator is directly energized, so that the stator can generate the changing magnetic field to rotate the magnet 16 around the preset axis, the magnet 16 drives the needle clamping assembly 12 to rotate around the preset axis, and the needle clamping assembly 12 can drive the root canal file clamped by the magnet to rotate around the preset axis, compared with the prior art, a separate driving motor is not required as a driving source, and intermediate transmission structures such as a transmission gear and a transmission shaft are not required, so that the whole size of the dental handpiece can be reduced while the number of parts is greatly reduced, the structure is complex and the whole weight is light, the production flow is short, the processing is simple, and the magnet 16 and the stator are not easily worn due to the interval, the assembly requirement is low, and the total cost is low.
Second embodiment
The basic structure and principle of the dental handpiece and the handpiece 1 thereof are substantially the same as those of the first embodiment, and for the sake of brief description, the corresponding contents in the first embodiment can be referred to where the embodiment is not mentioned.
Referring to fig. 8 and 9, in the present embodiment, a protruding pressing portion 921 is disposed on a side of the rear cover 92 close to the handpiece housing 10, and the handpiece 1 of the dental handpiece further includes a pressing member 8 opposite to and spaced from the pressing portion 921.
The needle clamping shrapnel 121 comprises a closed section 1210 and an open loop section 1212 which are coaxially connected, wherein the open loop section 1212 is far away from the first end of the handpiece shell 10 relative to the closed section 1210, the open loop section 1212 is provided with at most two slots 1214 extending along the preset axial direction,
the pressing member 8 has expansion protrusions 80 corresponding to the slots 1214 one by one, the outer diameter of the expansion protrusions 80 gradually increases along the direction from the first end to the second end of the handpiece housing 10, and the rear cover 92 can enable each expansion protrusion 80 to be clamped into a corresponding slot 1214 under the action of external force, so that the distance between the slots 1214 increases. That is, when the rear cap 92 moves toward the first end of the handpiece housing 10 under the action of external force, the pressing portion 921 gradually approaches the pressing member 8 until the pressing portion 921 pushes against the pressing member 8, so that the pressing member 8 moves toward the direction close to the first end of the handpiece housing 10, and the expansion protrusion 80 gradually extends into the slot 1214, so that the open-loop segment 1212 gradually expands under the abutment of the expansion protrusion 80, and thus the root canal file can be placed in the needle clamping elastic piece 121.
To sum up, in the dental handpiece and the handpiece 1 thereof of the present embodiment, the stator and the magnet 16 are arranged in the handpiece housing 10, the root canal file is loaded into the needle clamping assembly 12 from the first end of the handpiece housing 10, and then the stator is directly electrified, so that the stator can generate the variable magnetic field to enable the magnet 16 to rotate around the preset axis, the magnet 16 drives the needle clamping assembly 12 to rotate around the preset axis, and then the needle clamping assembly 12 can drive the root canal file clamped by the magnet to rotate around the preset axis, compared with the prior art, an independent driving motor is not needed as a driving source, and intermediate transmission structures such as a transmission gear and a transmission shaft are not needed, so that the whole size of the dental handpiece can be reduced while the number of parts is greatly reduced, the structure is complex, the whole mass is light, the production flow is short, the processing is simple, and meanwhile, because the magnet 16 and the stator are spaced, the abrasion is not easy, the assembly requirement is low, the total cost is low.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A handpiece of a dental handpiece, comprising:
a handpiece housing open at a first end on a preset axis;
the needle clamping assembly is arranged in the handpiece shell;
the magnet is sleeved outside the needle clamping assembly and used for driving the needle clamping assembly to rotate around the preset axis;
the stator is circumferentially arranged on the inner circumferential surface of the handpiece shell, is spaced from the magnet and is used for generating a variable magnetic field so as to drive the magnet to rotate around the preset axis.
2. The handpiece of claim 1, wherein the stator includes a plurality of stator cores disposed circumferentially at equal intervals on an inner peripheral surface of the handpiece housing, and a coil wound around each of the stator cores;
the handpiece of the dental handpiece further comprises position sensors which are arranged in the handpiece shell and correspond to the stator cores one to one, the position sensors are used for detecting the position information of the magnets and transmitting the position information to the controller, and the controller is used for controlling the energization and the de-energization of the coils respectively according to the change of the position information.
3. Handpiece according to claim 2, characterized in that the position sensor is a magneto-sensitive sensor for sending a first signal when detecting the N-pole of the magnet and a second signal when detecting the S-pole of the magnet, the controller being in particular adapted to determine a change in the position information from a change in the first and second signals for controlling the energizing or de-energizing of the plurality of coils, respectively.
4. The handpiece of claim 2, wherein the stator includes three of the stator cores, the magnet having two poles, the stator, the magnet and the position sensor together constituting a three-phase two-pole inner rotor brushless motor.
5. The handpiece of claim 1, wherein the needle assembly includes:
a needle clamping elastic sheet;
the shaft core is sleeved outside the needle clamping elastic sheet; the magnet is sleeved outside the shaft core and used for driving the shaft core to rotate around the preset axis, so that the needle clamping elastic sheet rotates around the preset axis.
6. The handpiece of claim 5, wherein the handpiece housing is open at a second end of the preset axis;
the handpiece of the dental handpiece also comprises a rear cover assembly, and the rear cover assembly comprises a rear cover and a support body;
the support body is provided with a through hole which axially extends along the preset axis and is arranged at the second end of the handpiece shell;
the back cover is arranged on one side, which is far away from the supporting body, of the supporting body and is spaced from the needle clamping elastic sheet, wherein the back cover can move towards the first end of the handpiece shell under the action of external force to contact the needle clamping elastic sheet and enable the needle clamping elastic sheet to expand.
7. The handpiece of claim 6, wherein the rear cover is provided with a raised pressing portion on a side thereof adjacent to the handpiece housing;
the clip needle shell fragment includes coaxial coupling's closed section and ring-opening section, the ring-opening section for the closed section is kept away from the first end of aircraft nose casing, it has a plurality of edges to open the ring section predetermine the fluting that the axis direction extends, it deviates from to open the ring section the one end of closed section is equipped with stirring portion, stirring portion extends to press the peripheral edges of splenium, just stirring portion is close to predetermine the surface of axis with press the outer peripheral face looks interval of splenium, wherein, the back lid can contact and extrusion under the exogenic action stirring portion, so that stirring portion is to keeping away from predetermine the direction skew of axis.
8. The handpiece of claim 6, wherein the rear cover is provided with a raised pressing portion on a side thereof adjacent to the handpiece housing, and the handpiece further comprises a pressing member opposite to and spaced from the pressing portion;
the needle clamping elastic sheet comprises a closed section and an open ring section which are coaxially connected, the open ring section is far away from the first end of the handpiece shell relative to the closed section, and the open ring section is provided with at most two slots extending along the direction of the preset axis;
the pressing piece is provided with expansion bulges in one-to-one correspondence with the slots, the expansion bulges are arranged along the direction from the first end to the second end of the handpiece shell, the outer diameter of the expansion bulges is gradually increased, and the rear cover can enable each expansion bulge to be clamped into the corresponding slot under the action of external force, so that the distance between the slots is increased.
9. A dental handpiece comprising a body housing and a handpiece of a dental handpiece according to any of claims 1 to 8, wherein the handpiece housing is attached to a first end of the body housing.
10. The dental handpiece of claim 9, further comprising a plug and a snap ring, wherein the plug is disposed through the second end of the body housing and electrically connected to the stator, and the snap ring is attached to the second end of the body housing and abuts against the plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111203312.9A CN113749795A (en) | 2021-10-15 | 2021-10-15 | Dental handpiece and handpiece thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111203312.9A CN113749795A (en) | 2021-10-15 | 2021-10-15 | Dental handpiece and handpiece thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113749795A true CN113749795A (en) | 2021-12-07 |
Family
ID=78799706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111203312.9A Pending CN113749795A (en) | 2021-10-15 | 2021-10-15 | Dental handpiece and handpiece thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113749795A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI822518B (en) * | 2021-12-17 | 2023-11-11 | 日商中西股份有限公司 | Dental handpiece |
-
2021
- 2021-10-15 CN CN202111203312.9A patent/CN113749795A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI822518B (en) * | 2021-12-17 | 2023-11-11 | 日商中西股份有限公司 | Dental handpiece |
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