CN218220339U - Head, dental handpiece and root canal preparation machine - Google Patents

Abstract

The utility model provides a aircraft nose, dental handpiece and root canal preparation machine relates to dental medical instrument technical field. The machine head comprises a machine core and a sleeve joint piece sleeved on the machine core; the movement can rotate and slide relative to the socket piece; the machine core is provided with a first contact surface, the socket piece is provided with a second contact surface, and the first contact surface and the second contact surface are oppositely arranged and always kept in contact; the first contact surface and the second contact surface are both composed of first cambered surfaces and second cambered surfaces which are arranged alternately along the circumferential direction of the first contact surface and have opposite protruding directions. When the root canal is enlarged, the dental handpiece does not need to be moved manually to adjust the depth of the file needle in the root canal, so that the treatment efficiency of the root canal enlargement can be effectively improved, and the difficulty of the root canal enlargement treatment is reduced.

Description

Head, dental handpiece and root canal preparation machine

Technical Field

The utility model relates to a dental medical instrument technical field especially relates to aircraft nose, dental handpiece and root canal preparation machine.

Background

Root canal enlargement is one of the most common treatment modalities in oral root canal treatment. In the process of root canal enlargement of a tooth, a root canal preparation machine is required to enlarge a damaged or clogged root canal of a tooth. The root canal is enlarged by clamping the file on the handpiece of the dental handpiece and grinding the diseased tissue in the root canal by driving the file to rotate.

At present, when a root canal enlargement treatment is performed, a dental handpiece needs to be repeatedly moved to adjust the depth of a file inserted into a root canal, thereby bringing out debris and the like formed by grinding, and realizing the dredging and enlargement of the root canal. The movement of repeatedly moving the dental handpiece is highly required for the manipulation technique of the doctor, and the movement is particularly inconvenient to perform because of the limited space for the posterior socket teeth.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide aircraft nose, dental handpiece and root canal preparation machine for solve the problem among the prior art.

In order to solve the above problem, the utility model provides a: the handpiece is applied to a dental handpiece and comprises a machine core and a sleeve piece sleeved on the machine core;

the movement is rotatable and slidable relative to the socket, wherein the rotation axis of the movement is collinear with the central axis of the movement, and the slidable direction of the movement is parallel to the central axis of the movement;

the machine core is provided with a first contact surface, the socket piece is provided with a second contact surface, and the first contact surface and the second contact surface are arranged oppositely and always kept in contact;

the first contact surface and the second contact surface are both composed of first cambered surfaces and second cambered surfaces which are alternately arranged along the circumferential direction of the contact surface and have opposite protruding directions;

the protruding directions of the first cambered surface and the second cambered surface of the first contact surface respectively face to two ends of the movement along the axial direction;

the protruding directions of the first cambered surface and the second cambered surface of the second contact surface respectively face to two ends of the socket joint piece along the axial direction.

As a further improvement of the above technical solution, the handpiece further includes a driving mechanism for driving the movement to rotate.

As a further improvement of the above technical solution, the driving mechanism includes a driving gear and a driven gear that are engaged with each other, wherein the driven gear is coaxial with the movement and is connected to the movement in a synchronous rotation manner.

As a further improvement of the above technical solution, the rotation axes of the driving gear and the driven gear are perpendicular.

As a further improvement of the technical scheme, a plug hole is arranged in the driven gear, a plug part matched with the plug hole is arranged on the machine core, and the cross section of the plug hole is non-circular;

wherein, the inserting part is inserted into the inserting hole and the inserting part and the inserting hole are in clearance fit.

As a further improvement of the above technical solution, an elastic member is disposed in the machine head, and the elastic member is used for applying an elastic force to the movement, so that the first contact surface and the second contact surface are always kept in a contact state.

As a further improvement of the above technical solution, an assembly hole is provided inside the driven gear, and the elastic member is mounted in the assembly hole;

two ends of the elastic piece are respectively abutted against the machine core and the driven gear, and the first contact surface is positioned between the second contact surface and the elastic piece.

As a further improvement of the technical scheme, the elastic piece is a spring and is sleeved on the movement.

The utility model discloses still provide: a dental handpiece comprising a handle and a handpiece as described above.

The utility model discloses still provide: root canal preparation machine, including file needle and dental handpiece as above.

The embodiment of the utility model provides a beneficial effect is: the aircraft nose is applied to dental handpiece, locates the cover and connects the piece on the core including core and cover, and the core is rotatable and slidable for connecting and connecting the piece. The machine core is provided with a first contact surface, the socket joint piece is provided with a second contact surface, the first contact surface and the second contact surface are both formed by a first arc surface and a second arc surface which are alternately arranged along the self circumferential direction and have opposite protruding directions, wherein the protruding directions of the first arc surface and the second arc surface of the first contact surface are respectively towards the two ends of the machine core along the axial direction, and the protruding directions of the first arc surface and the second arc surface of the second contact surface are respectively towards the two ends of the socket joint piece along the axial direction.

When the movement rotates, the position where the first contact surface and the second contact surface are contacted can be changed constantly, and the first contact surface and the second contact surface are in contact with each other all the time, so that the movement can do reciprocating linear motion in the direction parallel to the self axial direction under the interaction of the first contact surface and the second contact surface.

After the file needle is assembled on the machine core, the file needle can move synchronously along with the core, so that the depth of the file needle in the root canal is not required to be adjusted by moving a dental handpiece in a manual mode when the root canal is enlarged, the treatment efficiency of the root canal enlargement can be effectively improved, and the difficulty of root canal enlargement treatment is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 shows a schematic view of a handpiece equipped with a rasp needle;

FIG. 2 shows an exploded view of the handpiece of FIG. 1;

figure 3 shows a schematic view of the movement, socket and drive mechanism in an assembled state, with the movement in a first position;

figure 4 shows a schematic view of the movement, the socket and the drive mechanism in an assembled state, with the movement in a second position;

FIG. 5 shows a longitudinal cross-sectional view of FIG. 3;

figure 6 shows a first axial view of a movement;

figure 7 shows a second axial side view of the movement of figure 6;

figure 8 shows a front view of the movement of figure 6;

figure 9 shows a side view of the movement of figure 8;

FIG. 10 shows a first axial side view of a socket;

FIG. 11 shows a second axial side view of the socket of FIG. 10;

FIG. 12 shows a front view of the socket of FIG. 10;

FIG. 13 shows a side view of the socket of FIG. 12;

FIG. 14 shows an isometric view of a driven gear;

FIG. 15 shows a front view of the driven gear of FIG. 14;

FIG. 16 shows a top view of the driven gear of FIG. 15;

fig. 17 showsbase:Sub>A cross-sectional view alongbase:Sub>A-base:Sub>A in fig. 16.

Description of the main element symbols:

100-a movement; 110-a first contact surface; 120-mounting holes; 130-a plug-in part; 140-a shaft body; 200-socket; 210-a second contact surface; 220-a bearing seat; 310-a first arc; 320-second arc; 410-a drive gear; 420-a driven gear; 421-inserting holes; 422-rolling bearing; 423-fitting hole; 500-filing; 610-a housing; 620-rear end cap; 630-major axis; 631-a transmission gear; 640-a long shaft sleeve; 650-a gearbox; 700-a resilient member.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Examples

Referring to fig. 1, in the present embodiment, a handpiece applied to a dental handpiece is provided.

As shown in fig. 2 to 5, the handpiece includes a movement 100 and a socket 200 that is fitted over the movement 100. Wherein the movement 100 and the socket 200 are both mounted inside the housing 610 of the handpiece.

The movement 100 is rotatable and slidable with respect to the socket 200, wherein the rotation axis of the movement 100 is collinear with the central axis thereof, the slidable direction of the movement 100 is parallel with the central axis thereof, and the central axes of both the movement 100 and the socket 200 are collinear or parallel.

As shown in fig. 6 to 9, the movement 100 is provided with a first contact surface 110, and as shown in fig. 10 to 13, the socket 200 is provided with a second contact surface 210.

In the present embodiment, the first contact surface 110 and the second contact surface 210 are disposed opposite to each other and always kept in contact.

Both the first contact surface 110 and the second contact surface 210 are composed of first cambered surfaces 310 and second cambered surfaces 320 which are alternately arranged along the circumferential direction of the contact surfaces and have opposite protruding directions. The protruding directions of the first cambered surface 310 and the second cambered surface 320 of the first contact surface 110 face to two ends of the movement 100 along the axial direction respectively; the convex directions of the first arc surface 310 and the second arc surface 320 of the second contact surface 210 are respectively towards the two ends of the socket 200 along the axial direction.

The shape of the first contact surface 110 and the second contact surface 210 may be referred to as a wave spring. In the present embodiment, the first contact surface 110 and the second contact surface 210 constitute an end cam mechanism.

In the embodiment, the movement 100 is projected, and when the projection direction is parallel to the axial direction of the movement 100, the projection of the first contact surface 110 is in a ring shape; the socket 200 is projected, and when the projection direction is parallel to the axial direction of the socket 200, the projection of the second contact surface 210 is circular.

On the first contact surface 110, the adjacent first arc surface 310 and the second arc surface 320 are in smooth transition and are connected end to end; on the second contact surface 210, the adjacent first arc surface 310 and the second arc surface 320 are in smooth transition and are connected end to end.

The size of both the first contact surface 110 and the second contact surface 210 may be set as desired, wherein the number of the first arc surface 310 and the second arc surface 320 on the first contact surface 110 and the number of the first arc surface 310 and the second arc surface 320 on the second contact surface 210 may also be set as desired. In the present embodiment, both the first contact surface 110 and the second contact surface 210 are identical in structure and size.

With respect to the socket 200, the movement 100 can rotate and slide. In order to effectively support the movement 100, the socket 200 is a support bearing, wherein the socket 200 may be fixedly installed in the housing 610 through the bearing housing 220. Since the rotation speed of the movement 100 is slow and the load is small, the support bearing may be a linear bearing.

In order to drive the movement 100 in rotation, the handpiece also comprises a drive mechanism.

As shown in fig. 3 and 4, the driving mechanism includes a driving gear 410 and a driven gear 420 engaged with each other. Wherein the driving gear 410 is perpendicular to the rotation axis of the driven gear 420.

In order to drive the movement 100 in rotation, the driven gear 420 is coaxial with the movement 100 and is connected in rotation in synchronism therewith. When the driven gear 420 rotates, the movement 100 rotates synchronously with the driven gear 420. The inner part of the movement 100 is provided with a mounting hole 120 for mounting the rasp 500, and after the rasp 500 is mounted in the mounting hole 120 and fixed, when the movement 100 rotates, the rasp 500 rotates synchronously with the movement 100.

As shown in fig. 7, 14 and 16, a socket hole 421 is provided inside the driven gear 420, a socket portion 130 adapted to the socket hole 421 is provided on the movement 100, and the cross section of the socket hole 421 has a non-circular shape. Wherein, the inserting portion 130 is inserted into the inserting hole 421 and the two are in clearance fit.

In this embodiment, the cross-sectional shape of the insertion hole 421 may be a regular hexagon, and correspondingly, the cross-sectional shape of the insertion part 130 is also a regular hexagon. Wherein, the edges of the plugging hole 421 and the plugging portion 130 are rounded.

In other embodiments, the cross-sectional shape of the socket 421 may have other regular or irregular non-circular configurations as desired.

Referring to fig. 2, in the present embodiment, the handpiece mainly includes a housing 610, a movement 100, a driven gear 420, a socket 200, a rear end cap 620, a long shaft 630, a long shaft socket 640, a gear box 650, and the like. The driving gear 410 is fixedly disposed at one end of the long shaft 630, the other end of the long shaft 630 is disposed with a transmission gear 631, and the transmission gear 631 is in transmission connection with a gear assembly in the gear box 650.

The driven gear 420, the movement 100 and the socket 200 are all installed in the inner cavity of the head of the shell 610 through an opening above the head of the shell 610, wherein after the assembly is completed, the opening can be sealed by a rear end cover 620; the long shaft 630 is rotatably arranged inside the long shaft sleeve 640; the long shaft sleeve 640 is placed in the inner cavity of the neck of the housing 610 through the tail end of the neck of the housing 610 and is fixed in the housing 610 by means of screw connection or the like, wherein, when the long shaft sleeve 640 is installed, the driving gear 410 is required to be meshed with the driven gear 420; the gear case 650 is mounted to the rear end of the neck of the housing 610.

The driven gear 420 is installed in the inner cavity of the head of the housing 610 through the rolling bearing 422, and the socket 200 is fixed in the inner cavity of the head of the housing 610 through the bearing housing 220. The driving gear 410 and the driven gear 420 can only rotate compared to the housing 610.

Note that, in fig. 2, neither the long shaft sleeve 640 nor the gear box 650, etc. are subjected to explosion processing in order to avoid unnecessary interference.

Referring to fig. 3 and 4, when the driving gear 410 rotates, the driven gear 420 engaged with the driving gear 410 rotates, wherein the movement 100 rotates along with the driven gear 420 since the movement 100 is rotationally coupled with the driven gear 420 in synchronization.

The first contact surface 110 of the movement 100 is always in contact with the second contact surface 210 of the socket 200, wherein during the rotation of the movement 100, the peak of the first arc surface 310 on the first contact surface 110 is always in contact with the second contact surface 210.

Referring to fig. 2, 3 and 4, the socket 200 is fixedly mounted inside the handpiece, and as the movement 100 rotates, the contact position between the peak of the first arc surface 310 on the first contact surface 110 of the movement 100 and the second contact surface 210 of the socket 200 changes continuously, so that the movement 100 makes a reciprocating linear motion in the direction along the axial direction of the movement.

In fig. 3, the first contact surface 110 completely fits the second contact surface 210, wherein a peak of the first arc surface 310 of the first contact surface 110 contacts a peak of the first arc surface 310 of the second contact surface 210, and a valley of the second arc surface 320 of the first contact surface 110 contacts a valley of the second arc surface 320 of the second contact surface 210.

In fig. 4, the peak of the first arc 310 on the first contact surface 110 is in contact with the valley of the second arc 320 on the second contact surface 210.

In the process from fig. 3 to 4, as the movement 100 rotates, the peak of the first arc 310 on the first contact surface 110 moves from the peak of the first arc 310 on the second contact surface to the valley of the second arc 320 on the second contact surface 210, thereby moving the movement 100 downward. With the top surface of socket 200 and the bottom surface of movement 100 as references:

in fig. 3, the distance between the bottom surface of the movement 100 and the top surface of the socket 200 is the smallest, and the distance is set to L1;

in fig. 4, the distance between the bottom surface of the movement 100 and the top surface of the socket 200 is the largest, and the distance is L2.

As can be seen from the above, when the movement 100 rotates continuously, the distance between the bottom surface of the movement 100 and the top surface of the socket 200 changes periodically between L1 and L2.

Referring to fig. 8, 9, 12, and 13, the peak point refers to the highest point, and the valley point refers to the lowest point.

In the present embodiment, the movement 100 and the socket 200 constitute a cam mechanism.

In order to enable the movement 100 to perform reciprocating linear motion in the axial direction, the first contact surface 110 and the second contact surface 210 need to be in contact at all times.

In the present embodiment, an elastic member 700 is provided in the machine head, and the elastic member 700 is used for applying an elastic force to the movement 100, so that the first contact surface 110 and the second contact surface 210 are always in a contact state.

As shown in fig. 5 and 14 to 17, the driven gear 420 is provided with a fitting hole 423 therein, and the elastic member 700 is fitted into the fitting hole 423. The two ends of the elastic member 700 respectively contact the movement 100 and the driven gear 420, and the first contact surface 110 is located between the second contact surface 210 and the elastic member 700. The elastic member 700 is used for applying an elastic force to the movement 100, so that the first contact surface 110 and the second contact surface 210 are always in a contact state.

As shown in fig. 17, the fitting hole 423 and the insertion hole 421 are coaxially disposed and communicate with each other, the fitting hole 423 penetrates the top surface of the driven gear 420, and the insertion hole 421 penetrates the bottom surface of the driven gear 420.

The fitting hole 423 may be a circular hole, wherein the inner diameter of the fitting hole 423 is larger than the diameter of a circle circumscribing the socket hole 421. After the installation of the driven gear 420, the elastic member 700 and the movement 100 is completed, the bottom of the elastic member 700 abuts against the bottom surface of the mounting hole 423, and the top of the elastic member 700 abuts against the bottom surface of the shaft body 140 above the insertion part 130.

The elastic member 700 may be a spring and is sleeved on the movement 100. In addition, the elastic member 700 may use a spring, etc.

In this embodiment, a dental handpiece is also proposed, comprising a handpiece as proposed above and a handle. Wherein, the handle is detachably connected with the machine head, and a motor is arranged in the handle.

Further, in this embodiment, a root canal preparation machine is also provided, which includes a file 500 and a dental handpiece.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. The handpiece is applied to a dental handpiece and is characterized by comprising a machine core and a sleeve joint piece sleeved on the machine core;

the movement can rotate and slide relative to the socket piece, wherein the rotation axis of the movement is collinear with the central axis of the movement, and the sliding direction of the movement is parallel to the central axis of the movement;

the machine core is provided with a first contact surface, the socket piece is provided with a second contact surface, and the first contact surface and the second contact surface are arranged oppositely and are always kept in contact with each other;

the first contact surface and the second contact surface are both composed of first cambered surfaces and second cambered surfaces which are alternately arranged along the circumferential direction of the contact surface and have opposite protruding directions;

the protruding directions of the first cambered surface and the second cambered surface of the first contact surface respectively face to two ends of the movement along the axial direction;

the protruding directions of the first cambered surface and the second cambered surface of the second contact surface respectively face to two ends of the socket joint piece along the axial direction.

2. The handpiece of claim 1, further comprising a drive mechanism for driving the movement in rotation.

3. Handpiece according to claim 2, characterised in that said drive means comprise a driving gear and a driven gear meshing with each other, wherein said driven gear is coaxial with said movement and is connected in rotation in synchronism therewith.

4. The handpiece of claim 3, wherein the drive gear is perpendicular to the axes of rotation of both the driven gears.

5. The handpiece of claim 3, wherein the driven gear is internally provided with a plug hole, the movement is provided with a plug part matched with the plug hole, and the cross section of the plug hole is non-circular;

wherein, the inserting part is inserted into the inserting hole and the inserting part and the inserting hole are in clearance fit.

6. The handpiece according to any one of claims 3 to 5, wherein an elastic member is provided in the handpiece for applying an elastic force to the movement so that the first contact surface and the second contact surface are always in contact.

7. The handpiece according to claim 6, wherein the driven gear is internally provided with a fitting hole, and the elastic member is mounted in the fitting hole;

two ends of the elastic piece are respectively abutted against the machine core and the driven gear, and the first contact surface is positioned between the second contact surface and the elastic piece.

8. The handpiece of claim 7, wherein the elastic member is a spring and is sleeved on the movement.

9. Dental handpiece, characterized in that it comprises a handpiece and a handpiece according to any one of claims 1 to 8.

10. A root canal preparation machine comprising a file and a dental handpiece as claimed in claim 9.

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