CN215839565U - Back cover subassembly, dental handpiece and aircraft nose and dental electric motor thereof - Google Patents
Back cover subassembly, dental handpiece and aircraft nose and dental electric motor thereof Download PDFInfo
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- CN215839565U CN215839565U CN202122181702.2U CN202122181702U CN215839565U CN 215839565 U CN215839565 U CN 215839565U CN 202122181702 U CN202122181702 U CN 202122181702U CN 215839565 U CN215839565 U CN 215839565U
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Abstract
The embodiment of the utility model provides a rear cover component, a dental handpiece, a handpiece and a dental electric motor thereof, and relates to the technical field of oral treatment instruments. Therefore, the friction heating amount is reduced, the rear cover is not easy to heat up, and the human body is prevented from being scalded.
Description
Technical Field
The utility model relates to the technical field of oral treatment instruments, in particular to a rear cover assembly, a dental handpiece, a handpiece and a dental electric motor.
Background
At present when treating oral cavity patient, inevitable need use dental handpiece to polish, cut the osseous tissue in patient's oral cavity etc. however, through the inventor research discovery, dental handpiece's car needle clamping mode is back lid push type usually, in carrying out oral cavity treatment process, back lid probably is touched by the mistake and is pressed when patient intraoral during operation, lead to the back lid to touch rotating car needle pressing member, thereby pressing member and back lid friction produce a large amount of heats, and then the back lid intensifies, if the back lid touches the human body this moment, then probably lead to the human scald.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a rear cover assembly, a dental handpiece and a handpiece dental electric motor thereof, wherein the rear cover is not easy to heat up, and the scald to a human body is avoided.
In a first aspect, the present invention provides a rear cover assembly comprising:
the supporting body is provided with a pressing groove and a pressing through hole which are communicated;
the pressing piece is partially arranged in the pressing through hole in a penetrating way in a rotating way;
the rear cover is at least partially accommodated in the pressing groove, and one side of the rear cover, which is close to the bottom wall of the pressing groove, is provided with pressing parts which are opposite to the pressing parts and are spaced from the pressing parts;
the rolling piece is arranged on the pressing part in a rolling way and is spaced from the pressing part;
the rear cover can move towards the bottom wall of the pressing groove under the action of external force so as to compress the elastic piece and enable the rolling piece to contact the pressing piece.
In an alternative embodiment, the rolling elements are spherical.
In an alternative embodiment, the pressing portion is provided with a mounting groove, an opening direction of the mounting groove faces the pressing member, and the rolling member portion is movably disposed in the mounting groove.
In an alternative embodiment, the inner diameter of the open end of the mounting groove is smaller than the inner diameter of the bottom of the mounting groove and smaller than the diameter of the rolling member; and/or the presence of a gas in the gas,
one side of the pressing part, which is close to the pressing part, is provided with a tapered hole, and the rolling part and the inner wall of the tapered hole are separated at intervals.
In an alternative embodiment, the surface of the rolling member is formed with a smooth wear-resistant coating; and/or a smooth wear-resistant coating is formed on the bottom wall of the mounting groove; and/or a smooth wear-resistant coating is formed on one side, close to the pressing part, of the pressing part.
In an alternative embodiment, the material of the rolling elements has a coefficient of friction less than or equal to 0.3; and/or the presence of a gas in the gas,
the Vickers hardness of the material of the rolling elements is greater than or equal to 600 HV.
In an alternative embodiment, a fixing groove is formed on one side of the rear cover corresponding to the pressing member, the pressing portion is a block with a shape matched with that of the fixing groove, and the pressing portion is fixed in the fixing groove.
In a second aspect, the present invention provides a handpiece for a dental handpiece, comprising:
the head end and the tail end of the machine head shell are both open;
the rear cover assembly of any preceding embodiment, wherein the support body is disposed at a head end of the handpiece housing, and the pressing groove is away from a tail end of the handpiece housing relative to the pressing through hole.
In a third aspect, the present invention provides a dental handpiece comprising a handpiece of the dental handpiece of the previous embodiment.
In a fourth aspect, the present invention provides a dental electric motor comprising a dental handpiece as described in the previous embodiments.
According to the rear cover assembly, the dental handpiece, the handpiece and the dental electric motor provided by the embodiment of the utility model, the pressing groove and the pressing through hole which are communicated are arranged on the support body, the rotatable part of the pressing piece is arranged in the pressing through hole in a penetrating way, at least part of the rear cover is accommodated in the pressing groove, the pressing part which is opposite to and spaced from the pressing piece is arranged on one side of the bottom wall of the pressing groove of the rear cover, the rolling piece is arranged on the pressing part in a rolling way and is spaced from the pressing piece, and the elastic piece is abutted between the bottom wall of the pressing groove and the rear cover. From this, the operator only need press the back lid when needs press back lid dismouting car needle for the back lid moves towards the direction that is close to the diapire that presses the groove, thereby supports and holds in the back lid and press the elastic component between the groove and be compressed gradually, until rolling member and pressing piece contact in order to push away to the pressing piece can. After the car needle dismouting finishes, loosen the back lid, the back lid will move towards the direction of keeping away from the diapire of pressing the groove under the resilience force effect of elastic component to drive the rolling member and keep away from the pressing member, until rolling member and pressing member looks interval, thereby the operator just can start dental handpiece, makes the car needle rotate and carries out oral treatment. Rotate in order to drive the pressing part pivoted in-process at the car needle, if the quilt is touched by mistake and is pressed after taking place, lead to the rolling member to contact with the pressing part, because the rolling member can roll ground part set up in pressing the splenium, consequently the rolling member also is rolling friction contact for the pressing part that is rotating, frictional force between rolling member and the pressing part is minimum, even the rolling member is driven by the pressing part and can rotate for the hou gai, the rotational speed is also extremely slow, the rolling member is also minimum with the frictional force of pressing between the splenium, thereby greatly reduced calorific capacity, make the hou gai be difficult for rising temperature, avoid scalding the human body.
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 view of a handpiece provided by an embodiment of the present invention;
fig. 2 is a combined schematic view of the rear cover assembly, the rotary shaft sleeve, the bearing and the needle.
Icon: 1-a handpiece shell; 2-a rear cover assembly; 21-a support; 210-pressing groove; 212-pressing the through hole; 23-a press; 230-a tapered hole; 25-rear cover; 250-a pressing part; 252-a mounting groove; 27-rolling elements; 29-a resilient member; 3-clamping a pin elastic sheet; 4-a rotating shaft sleeve; 5-a bearing; 6-needle turning.
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 utility model, as claimed, but is merely representative of selected embodiments of the utility model. 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 "middle part", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, 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 to be referred must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention.
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.
At present when treating oral cavity patient, inevitable need use dental handpiece to polish, cut the osseous tissue in patient's oral cavity etc. however, through the inventor research discovery, dental handpiece's car needle clamping mode is back lid push type usually, in carrying out oral cavity treatment process, back lid probably is touched by the mistake and is pressed when patient intraoral during operation, lead to the back lid to touch rotating car needle pressing member, thereby pressing member and back lid friction produce a large amount of heats, and then the back lid intensifies, if the back lid touches the human body this moment, then probably lead to the human scald.
In view of the above-mentioned drawbacks, the inventors have studied and proposed the following examples to improve upon, and will now describe in detail some embodiments of the present invention with reference to the accompanying drawings. It should be noted that, in the following embodiments, features of the embodiments may be combined with each other without conflict.
An embodiment of the present invention provides a dental handpiece, which includes a handpiece neck and a handpiece connected to one end of the handpiece neck, and referring to fig. 1 and 2, the handpiece includes a handpiece housing 1, a needle clamping elastic sheet 3, a rotating shaft sleeve 4, a bearing 5 and a back cover assembly 2. The head end and the tail end of the handpiece shell 1 are both opened, and the side wall of the handpiece shell 1 is provided with an opening, so that the handpiece neck is connected with the handpiece shell 1 through the opening. The rear cover assembly 2 is arranged at the head end of the handpiece shell 1, and the needle clamping elastic sheet 3 is arranged in the rotating shaft sleeve 4 and used for clamping a machine needle 6. The both ends of pivot cover 4 are overlapped respectively and are equipped with at least one bearing 5 to pivot cover 4 rotationally sets up in aircraft nose casing 1, and when bearing 5 can also reduce the rotation frictional force, stabilizes the rotation precision of pivot cover 4, in addition, owing to press from both sides needle shell fragment 3 and set up in pivot cover 4, consequently the centre gripping shell fragment also can rotate along with pivot cover 4, with under the condition that 3 centre gripping of clamp needle shell fragment have car needle 6, makes car needle 6 rotate.
The rear cover assembly 2 includes a support body 21, a pressing member 23, a rear cover 25, a rolling member 27, and an elastic member 29. The support body 21 is provided at the head end of the handpiece housing 1, and the support body 21 is provided with a pressing groove 210 and a pressing through hole 212 communicating with each other, and the pressing groove 210 is away from the rear end of the handpiece housing 1 with respect to the pressing through hole 212. The pressing piece 23 is partly worn to locate in pressing through-hole 212 rotationally, pressing piece 23 partially sets up in pivot cover 4 specifically, be provided with at least one bearing 5 in the pressing through-hole 212, the one end that pivot cover 4 leaned on is worn to locate in this bearing 5, pressing piece 23 is close to the head end of aircraft nose casing 1 for the centre gripping shell fragment, consequently, pressing piece 23 receives external force to act on the time and can remove to pressing from both sides needle shell fragment 3, with the extrusion press from both sides needle shell fragment 3, make and press from both sides the extension of needle shell fragment 3, and then just can follow the tail end of aircraft nose casing 1 and insert needle 6 or take out needle 6 in the needle shell fragment 3 that presss from both sides that has expanded. The rear cover 25 is at least partially accommodated in the pressing groove 210, and a pressing portion 250 is disposed on a side of the rear cover 25 close to the bottom wall of the pressing groove 210 and spaced from the pressing member 23. The rolling member 27 is rollably disposed at the pressing portion 250, and spaced apart from the pressing member 23. The elastic member 29 abuts between the bottom wall of the pressing groove 210 and the rear cover 25, and the rear cover 25 can move towards the bottom wall of the pressing groove 210 under the action of external force to compress the elastic member 29 and make the rolling member 27 contact the pressing member 23.
Therefore, when the operator needs to press the rear cover 25 to mount and dismount the needle 6, the operator only needs to press the rear cover 25, so that the rear cover 25 moves towards the direction close to the bottom wall of the pressing groove 210, and the elastic piece 29 abutted between the rear cover 25 and the pressing groove 210 is gradually compressed until the rolling piece 27 is in contact with the pressing piece 23 to push and abut against the pressing piece 23. After the car needle 6 dismouting is finished, loosen back lid 25, back lid 25 will move towards the direction of keeping away from the diapire of pressing groove 210 under the resilience force effect of elastic component 29 to drive rolling member 27 and keep away from pressing member 23, until rolling member 27 and pressing member 23 looks interval, thereby the operator just can start the dental handpiece, makes car needle 6 rotate and carries out oral treatment. In the process that the sewing needle 6 rotates to drive the pressing piece 23 to rotate, if the rear cover 25 is pressed by mistake, the rolling piece 27 is in contact with the pressing piece 23, because the rolling piece 27 is partially arranged on the pressing part 250 in a rolling way, the rolling piece 27 is in rolling friction contact relative to the rotating pressing piece 23, the friction force between the rolling piece 27 and the pressing piece 23 is extremely small, even if the rolling piece 27 is driven by the pressing piece 23 to rotate relative to the rear cover 25, the rotating speed is extremely slow, the friction force between the rolling piece 27 and the pressing part 250 is also extremely small, the heat productivity is greatly reduced, the rear cover 25 is not easy to heat up, and the scald to the human body is avoided.
In order to ensure that the frictional force between the rolling member 27 and the pressing portion 250 and the pressing member 23, respectively, is sufficiently small, the rolling member 27 is provided in a spherical shape, thereby reducing the contact area between the rolling member 27 and the pressing member 23 and the pressing portion 250, respectively.
In order to facilitate the alignment and the pushing of the rolling member 27 against the pressing member 23 when the operator presses the rear cover 25 to attach and detach the needle 6, a tapered hole 230 is provided in the pressing member 23 in a region corresponding to the rolling member 27, and an inner wall of the tapered hole 230 is spaced from the rolling member 27, whereby the rolling member 27 is spaced from the pressing member 23 through the tapered hole 230. Wherein, the tapered hole 230 is a blind hole, the opening direction of the tapered hole 230 faces the rolling member 27, and the inner diameter of the opening end of the tapered hole 230 is larger than the inner diameter of the bottom of the tapered hole 230.
Specifically, the rolling member 27 may be rollably disposed on the pressing portion 250 in a manner that the pressing portion 250 is provided with a mounting groove 252, an opening direction of the mounting groove 252 faces the pressing member 23, and a part of the rolling member 27 is movably disposed in the mounting groove 252. In addition, in order to prevent the rolling member 27 from coming out of the mounting groove 252, the inner diameter of the opening end of the mounting groove 252 is set to be smaller than the inner diameter of the bottom of the mounting groove 252 and smaller than the diameter of the rolling member 27; in order to ensure that the rolling member 27 can move flexibly in the mounting groove 252, the rolling member 27 has a diameter smaller than the inner diameter of the middle portion of the mounting groove 252.
The pressing part 250 may be integrally connected with the rear cover 25, or may be in a split connection, and when the pressing part 250 is integrally connected with the rear cover 25, the pressing part 250 is a protruding object extending from the region of the rear cover 25 corresponding to the pressing piece 23; when pressing the portion 250 and being connected with the rear cover 25 in a split manner, one side of the rear cover 25 corresponding to the pressing piece 23 is provided with a fixing groove, the pressing portion 250 is a block with a shape matched with that of the fixing groove, the pressing portion 250 is fixed in the fixing groove, and the pressing portion 250 and the fixing groove are in interference fit.
The elastic member 29 may be a tubular member capable of generating elastic deformation, such as a coil spring, a bellows, etc., and surrounds the pressing portion 250, and two ends of the elastic member 29 respectively abut against the side of the rear cover 25 close to the bottom wall of the accommodating groove and the bottom wall of the accommodating groove.
The surfaces of the rolling members 27 are formed with smooth wear-resistant coatings, so that rolling friction between the rolling members 27 and the pressing portions 250 and the pressing members 23, respectively, can be reduced to further reduce the amount of heat generation. Of course, a smooth wear-resistant coating may be formed on the bottom wall of the mounting groove 252 to reduce the rolling friction between the rolling member 27 and the pressing portion 250. A smooth wear-resistant coating can be formed on one side of the pressing piece 23 close to the pressing portion 250, so that the rolling friction force between the rolling piece 27 and the pressing piece 23 is reduced. Wherein the smooth wear-resistant coating can be polytetrafluoroethylene and the like. Grease such as vaseline can be applied to the surface of the rolling member 27, and the friction can be reduced.
The rolling members 27 are made of materials with low friction coefficient and high hardness, and the friction coefficient of the materials selected for the rolling members 27 is less than or equal to 0.3, so that the friction force is directly reduced to reduce the heat generation. The Vickers hardness of the material of the rolling member 27 is larger than or equal to 600HV, so that the rolling member 27 is prevented from being scratched to cause rough surface, and further the bad phenomenon that the friction force is increased is avoided. Such as ceramic, diamond, ruby or graphite, wherein the surface roughness of the ceramic can be made small, and the balls in some high-speed bearings 5 are made of ceramic materials, such as zirconia; the friction coefficient of the diamond and the steel under the dry friction condition is 0.1-0.15 (the friction coefficient of a reference steel and the steel under the same condition is 1.0 in comparison); the friction coefficient of the ruby and the steel under the dry friction condition is 0.25; the coefficient of friction of graphite and steel under dry friction conditions was 0.1.
It should be noted that, in some embodiments, the rolling element 27 may not be spherical, but may also be cylindrical, and both opposite end surfaces of the cylindrical shape are spherical, so as to achieve the effects of reducing the contact area and reducing the frictional heat.
In addition, the dental handpiece of the above embodiment can be applied to different oral medical instruments capable of cutting and grinding the bone tissue of the oral cavity of the patient, such as an electric dental motor, a dental implanter, a dental preparation machine and the like.
In summary, the supporting body 21 is provided with the pressing groove 210 and the pressing through hole 212 which are communicated with each other, the pressing piece 23 is rotatably partially inserted into the pressing through hole 212, the rear cover 25 is at least partially accommodated in the pressing groove 210, the pressing portion 250 opposite to and spaced from the pressing piece 23 is provided on the side of the bottom wall of the pressing groove 210 close to the rear cover 25, the rolling piece 27 is rollably provided on the pressing portion 250, the rolling piece 27 is spaced from the pressing piece 23, and the elastic piece 29 is abutted between the bottom wall of the pressing groove 210 and the rear cover 25.
Therefore, when the operator needs to press the rear cover 25 to mount and dismount the needle 6, the operator only needs to press the rear cover 25, so that the rear cover 25 moves towards the direction close to the bottom wall of the pressing groove 210, and the elastic piece 29 abutted between the rear cover 25 and the pressing groove 210 is gradually compressed until the rolling piece 27 is in contact with the pressing piece 23 to push and abut against the pressing piece 23. After the car needle 6 dismouting is finished, loosen back lid 25, back lid 25 will move towards the direction of keeping away from the diapire of pressing groove 210 under the resilience force effect of elastic component 29 to drive rolling member 27 and keep away from pressing member 23, until rolling member 27 and pressing member 23 looks interval, thereby the operator just can start the dental handpiece, makes car needle 6 rotate and carries out oral treatment. In the process that the sewing needle 6 rotates to drive the pressing piece 23 to rotate, if the rear cover 25 is pressed by mistake, the rolling piece 27 is in contact with the pressing piece 23, because the rolling piece 27 is partially arranged on the pressing part 250 in a rolling way, the rolling piece 27 is in rolling friction contact relative to the rotating pressing piece 23, the friction force between the rolling piece 27 and the pressing piece 23 is extremely small, even if the rolling piece 27 is driven by the pressing piece 23 to rotate relative to the rear cover 25, the rotating speed is extremely slow, the friction force between the rolling piece 27 and the pressing part 250 is also extremely small, the heat productivity is greatly reduced, the rear cover 25 is not easy to heat up, and the scald to the human body is avoided.
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 utility model 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 rear cover assembly, comprising:
the supporting body is provided with a pressing groove and a pressing through hole which are communicated;
the pressing piece is partially arranged in the pressing through hole in a penetrating way in a rotating way;
the rear cover is at least partially accommodated in the pressing groove, and one side of the rear cover, which is close to the bottom wall of the pressing groove, is provided with pressing parts which are opposite to the pressing parts and are spaced from the pressing parts;
the rolling piece is arranged on the pressing part in a rolling way and is spaced from the pressing part;
the rear cover can move towards the bottom wall of the pressing groove under the action of external force so as to compress the elastic piece and enable the rolling piece to contact the pressing piece.
2. The rear cover assembly as claimed in claim 1, wherein the rolling member is spherical.
3. The rear cover assembly as claimed in claim 2, wherein the pressing portion is provided with a mounting groove, an opening of the mounting groove is directed toward the pressing member, and the rolling member portion is movably disposed in the mounting groove.
4. The rear cover assembly as claimed in claim 3, wherein an inner diameter of the open end of the mounting groove is smaller than an inner diameter of the bottom of the mounting groove and smaller than a diameter of the rolling member; and/or the presence of a gas in the gas,
one side of the pressing part, which is close to the pressing part, is provided with a tapered hole, and the rolling part and the inner wall of the tapered hole are separated at intervals.
5. The rear cover assembly according to claim 3, wherein a surface of the rolling member is formed with a smooth wear-resistant coating; and/or a smooth wear-resistant coating is formed on the bottom wall of the mounting groove; and/or a smooth wear-resistant coating is formed on one side, close to the pressing part, of the pressing part.
6. The rear cover assembly as claimed in claim 1, wherein a friction coefficient of a material of the rolling member is less than or equal to 0.3; and/or the presence of a gas in the gas,
the Vickers hardness of the material of the rolling elements is greater than or equal to 600 HV.
7. The rear cover assembly as claimed in claim 1, wherein a fixing groove is formed at a side of the rear cover corresponding to the pressing member, the pressing part is a block having a shape corresponding to a shape of the fixing groove, and the pressing part is fixed in the fixing groove.
8. A handpiece of a dental handpiece, comprising:
the head end and the tail end of the machine head shell are both open;
the rear cover assembly of any one of claims 1-7, wherein the support body is disposed at a head end of the handpiece housing, and the pressing groove is distal from a tail end of the handpiece housing relative to the pressing through hole.
9. A dental handpiece comprising a handpiece of the dental handpiece of claim 8.
10. An electric dental motor comprising a dental handpiece according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122181702.2U CN215839565U (en) | 2021-09-09 | 2021-09-09 | Back cover subassembly, dental handpiece and aircraft nose and dental electric motor thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122181702.2U CN215839565U (en) | 2021-09-09 | 2021-09-09 | Back cover subassembly, dental handpiece and aircraft nose and dental electric motor thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215839565U true CN215839565U (en) | 2022-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122181702.2U Active CN215839565U (en) | 2021-09-09 | 2021-09-09 | Back cover subassembly, dental handpiece and aircraft nose and dental electric motor thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215839565U (en) |
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- 2021-09-09 CN CN202122181702.2U patent/CN215839565U/en active Active
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