CN117959009A - Dental handpiece with airless front end - Google Patents

Abstract

The application relates to the technical field of dental tools, in particular to a dental handpiece with a airless front end, which comprises a machine handle, an internal pipeline and a machine head, wherein the internal pipeline is arranged in the machine handle; the aircraft nose includes casing, cover, wind turbine group, bearing cap and keeps off the ring, and the cover is connected with the casing, and the cover forms the wind turbine cavity jointly with the casing, and wind turbine group, bearing and bearing cap all are located the wind turbine cavity, and the bearing cap cover is established on the bearing, keeps off the ring and is connected with the bearing through the axle sleeve, keeps off and has the clearance between ring and the bearing cap, and compressed air drives wind turbine group rotation, has offered the mounting hole that is used for supplying the drill point to pass through on the wind turbine group, and the drill point is connected with the wind turbine group and wears to establish in the axle sleeve. The application has the effects of eliminating the compressed air flowing out of the front end of the dental handpiece on the premise of ensuring cooling and avoiding the occurrence of surgical emphysema.

Description

Dental handpiece with airless front end

Technical Field

The application relates to the technical field of dental tools, in particular to a dental handpiece with a airless front end.

Background

The teeth are used as important components of human organs, so that people can be helped to chew food, and people can be helped to talk in an open way and conduct social activities smoothly. When a tooth is in question, a doctor may use a dental tool for treatment.

Instruments used in oral treatment procedures include surgical drills, dental forceps, gingival separators, and the like, with dental handpieces also being a common surgical tool. The high-speed turbine dental drill handpiece, namely a dental handpiece, is an appliance for a doctor to drill and grind teeth. Power sources are generally classified into two types, electric dental handpieces and pneumatic dental handpieces. The electric dental handpiece is driven by a micro motor, the pneumatic dental handpiece is driven by high pressure air flow, and the pneumatic dental handpiece is used and sold by dentists in many places. The pneumatic dental handpiece has high and balanced revolution and strong cutting drilling force, can relieve the pain of patients and the labor intensity of dentists, and improves the working efficiency.

The pneumatic dental handpiece recorded in the related art has the working process that: the dental handpiece is driven by compressed air serving as a power source through a dental chair arranged in a treatment room, and a wind wheel in the dental handpiece is driven through a pipeline in the handpiece to drive a drill point clamped on a mandrel of the handpiece to rotate. The cutting force is generated by rotation to polish the teeth and other areas. In the process that compressed air drives the wind wheel to rotate through the wind wheel chamber, as the mandrel rotates at a high speed, the bearing of the mandrel needs to be cooled, and therefore part of the compressed air can diffuse towards the two axial ends of the machine head along with the gap between the bearing and the wind wheel chamber. When gas passes through the interstitial space and enters the interstitial space during the use of the mobile phone, the gas rapidly diffuses and accumulates in the interstitial space to cause emphysema. Emphysema is a very common surgical complication in dental procedures. Therefore, designing a dental handpiece that can avoid the occurrence of emphysema during use is a highly desirable problem.

Disclosure of Invention

In order to eliminate the compressed air flowing out of the front end of the dental handpiece on the premise of ensuring cooling so as to avoid the occurrence of emphysema in operation, the application provides the dental handpiece with the airless front end.

The dental handpiece with the airless front end provided by the application adopts the following technical scheme:

The dental handpiece with the airless front end comprises a handle, an internal pipeline and a handpiece, wherein the internal pipeline is arranged in the handle, the handpiece is connected to the handle, a wind wheel cavity is formed in the handpiece, the internal pipeline is communicated with the wind wheel cavity, and compressed air enters the wind wheel cavity through the internal pipeline;

The machine head comprises a machine shell, a machine cover, a wind wheel set, a bearing cover and a baffle ring, wherein the machine cover is connected with the machine shell, the machine cover and the machine shell jointly form a wind wheel cavity, the wind wheel set, the bearing and the bearing cover are all positioned in the wind wheel cavity, the bearing cover is arranged on the bearing, the baffle ring is connected with the bearing through a shaft sleeve, a gap exists between the baffle ring and the bearing cover, the wind wheel set drives the wind wheel set to rotate through compressed air, a mounting hole for a drill needle to pass through is formed in the wind wheel set, and the drill needle is connected with the wind wheel set and penetrates through the shaft sleeve.

Through adopting above-mentioned technical scheme, during the use, compressed air passes through the pipeline in the handle and reaches inside pipeline, then compressed air passes through inside pipeline entering wind wheel cavity, and compressed air can drive the rotation of wind wheel group after entering wind wheel cavity, and then alright drive the drill point and rotate. Like this, utilize the cooperation between bearing, bearing cap and the fender ring, compressed air passes through the bearing gap, then again passes through the space between bearing cap and the fender ring, and outside along fender ring outer wall flow direction aircraft nose, because the dabber is in high-speed rotation state, the air current that flows through is guided to radial along the boss direction that keeps off the ring setting, no longer enters into patient's tissue through the front end of aircraft nose. Therefore, the normal working requirement of the product is met, compressed air can be prevented from flowing out of the front end of the dental handpiece, and the occurrence of surgical emphysema is effectively avoided.

Optionally, the handpiece further includes a first seal assembly disposed between the bearing cap and the housing.

Through adopting above-mentioned technical scheme, first seal assembly is used for guaranteeing the leakproofness between bearing cap and the casing, and compressed air can only flow out to the outside of aircraft nose through the gap of bearing, the clearance between bearing cap and the backing ring to guarantee the stability and the uniqueness of direction.

Optionally, the handpiece further includes a second seal assembly, the second seal assembly being disposed on the cover.

Through adopting above-mentioned technical scheme, utilize first seal assembly and second seal assembly's setting, guaranteed the leakproofness in the aircraft nose, improved the possibility that the front end is airless.

Optionally, the machine head further comprises a connector, the connector comprises a straight head and an elbow, the straight head is connected with the machine handle, and the machine shell is connected with the straight head through the elbow.

Through adopting above-mentioned technical scheme, utilize the cooperation of straight head and elbow, the flexibility ratio when can improving the aircraft nose installation, the aircraft nose can be the arbitrary angle setting with the handle promptly to reach best operating angle, realize the operation convenience.

Optionally, the straight head is detachably connected with the handle.

Through adopting above-mentioned technical scheme, utilize the detachable connection design of straight head, can design into detachable with the aircraft nose, be convenient for change, the maintenance of aircraft nose, when the dental handpiece does not use moreover can dismantle the aircraft nose, be convenient for deposit.

Optionally, the diameter of the handle is gradually reduced from one end far away from the straight head to one end close to the straight head, the diameter of the straight head is gradually reduced from one end close to the handle to one end far away from the handle, and the maximum diameter of the straight head is smaller than the minimum diameter of the handle.

By adopting the technical scheme, the machine handle and the straight head are conical, and the machine handle and the straight head are also conical as the maximum diameter of the straight head is smaller than the minimum diameter of the machine handle. Thus, on one hand, the attractive appearance can be improved, and on the other hand, the material can be saved, and the cost can be reduced.

Optionally, the handle includes a front handle and a rear handle, and the front handle and the rear handle are detachably connected.

Through adopting above-mentioned technical scheme, divide into preceding handle and back handle with the handle, the processing of handle of being convenient for can unpack apart the handle when the dental handpiece does not use, can reduce holistic volume like this, is convenient for deposit.

Optionally, an air inlet channel is formed in the rear engine handle, and the internal pipeline is communicated with the air inlet channel.

Through adopting above-mentioned technical scheme, during the use, can be directly with inside pipeline connection on air inlet channel, let in air inlet channel with compressed gas, compressed air flows through the air inlet channel and enters into inside pipeline, utilizes the air inlet channel in the rear engine handle, can reduce the length of inside pipeline to save the cost.

Optionally, the rear machine handle comprises a main body and a connecting seat, wherein the connecting seat is connected with the main body, and external threads are machined on the connecting seat.

Through adopting above-mentioned technical scheme, utilize the screw thread of processing, the connecting seat of being convenient for is connected with other parts, stability, fastness and leakproofness when the screw thread can improve the connection simultaneously.

Optionally, anti-skid patterns are processed on the front machine handle.

Through adopting above-mentioned technical scheme, the friction force of front machine handle can be improved to the anti-skidding line, and the personnel of being convenient for operate handheld.

In summary, the present application includes at least one of the following beneficial technical effects:

1. The application provides a dental handpiece with a front end free of air, which comprises a handle, an internal pipeline and a handpiece, wherein a wind wheel chamber is formed in the handpiece, the handpiece comprises a shell, a wind wheel set, a bearing cover and a baffle ring, the wind wheel set is rotationally connected with the shell through the bearing, the bearing cover is covered on the bearing, the baffle ring is connected with the bearing through a shaft sleeve, and a gap exists between the bearing cover and the baffle ring. Compressed air reaches the internal pipeline through the pipeline in the handle, and the internal pipeline communicates to the wind wheel room, drives the wind wheel group and rotates, and then alright drive the drill point and rotate, and compressed air can pass through the gap of bearing, and the clearance between bearing cap and the fender ring is passed through again, finally follows the outside of the outer wall flow direction aircraft nose of fender ring. Like this, utilize the cooperation between bearing, bearing cap and the fender ring, compressed air passes through the bearing gap, then again passes through the space between bearing cap and the fender ring, and outside along fender ring outer wall flow direction aircraft nose, because the dabber is in high-speed rotation state, the air current that flows through is guided to radial along the boss direction that keeps off the ring setting, no longer enters into patient's tissue through the front end of aircraft nose. Thus, the normal working requirement of the product is met, compressed air can be prevented from flowing out from the front end of the dental handpiece, and the occurrence of surgical emphysema is effectively avoided;

2. In the application, the machine head further comprises a machine cover, a first sealing component and a second sealing component, wherein the machine cover is connected with the machine shell, the first sealing component is used for ensuring the tightness between the bearing cover and the machine shell, the drill point is connected to the wind wheel set, the drill point is driven to rotate through the rotation of the wind wheel set, and the second sealing component is used for improving the tightness between the drill point and the machine cover. The tightness in the machine head is ensured through the arrangement of the first sealing component and the second sealing component, so that compressed air can only flow out of the gap of the bearing, the gap between the bearing cover and the baffle ring to the outside of the machine head, thereby ensuring the stability and the uniqueness of guiding;

3. according to the application, the machine handle comprises the front machine handle and the rear machine handle, the front machine handle is detachably connected with the rear machine handle, various pipelines are arranged in the rear machine handle, and corresponding pipelines are not required to be additionally arranged, so that the length of the original pipeline can be reduced, and the cost is saved.

Drawings

FIG. 1 is a schematic diagram of a front end airless dental handpiece of the present application;

FIG. 2 is a schematic view of the front end airless dental handpiece of the present application with the front handle hidden;

FIG. 3 is a cross-sectional view of a handpiece in the present application;

Fig. 4 is a schematic structural view of the handpiece of the present application.

Reference numerals illustrate: 1. an internal pipeline; 2. a handle; 21. a front handle; 22. a rear handle; 221. a main body; 222. a connecting seat; 3. a machine head; 31. a wind wheel chamber; 32. a housing; 33. a wind wheel group; 34. a bearing; 35. a bearing cap; 36. a baffle ring; 37. a connector; 371. a straight head; 372. an elbow; 38. a cover; 4. a first seal assembly; 5. a second seal assembly; 6. anti-skid lines; 7. an air intake passage; 8. an external thread; 9. a mounting hole; 10. and (5) reserving holes.

Detailed Description

The application is described in further detail below with reference to fig. 1-4.

The embodiment of the application discloses a dental handpiece with a front end free of air, which comprises a machine handle 2, an internal pipeline 1 and a machine head 3, wherein the internal pipeline 1 is arranged in the machine handle 2, the machine head 3 is connected to the machine handle 2, the internal pipeline 1 is communicated with the interior of the machine head 3, the internal pipeline 1 is used for conveying compressed air to be used as a power source, a drill needle is arranged on the front end of the machine head 3, the machine head 3 can drive the drill needle to rotate, and the machine head 3 can guide the compressed air out of the machine head 3.

When the drill bit is used, compressed air is conveyed into the machine head 3, the compressed air can be used as a power source to drive the drill bit to rotate through the machine head 3, and meanwhile, the compressed air is guided out of the machine head 3. Like this, through carrying out the water conservancy diversion to compressed air, compressed air just no longer gets into patient's tissue through the front end of aircraft nose 3 in, has both satisfied the normal work demand of product, can also avoid compressed air to flow from the front end of dental handpiece, has avoided the emergence of operation emphysema effectively.

Specifically, referring to fig. 2 and 3, a wind wheel chamber 31 is formed in the machine head 3, the internal pipeline 1 is communicated with the wind wheel chamber 31, and compressed air enters the wind wheel chamber 31 through the internal pipeline 1. The machine head 3 comprises a machine shell 32, a machine cover 38, a wind wheel set 33, a bearing 34, a bearing cover 35 and a baffle ring 36, wherein the machine cover 38 is connected with the machine shell 32, the machine cover 38 and the machine shell 32 jointly enclose a wind wheel cavity 31, the wind wheel set 33, the bearing 34 and the bearing cover 35 are all positioned in the wind wheel cavity 31, a mounting hole 9 for a drill needle to pass through is formed in the wind wheel set 33, and the drill needle is connected with the wind wheel set 33 and penetrates through a shaft sleeve. When external compressed air enters the wind wheel cavity 31 through the internal pipeline 1, the wind wheel is directly driven to rotate rapidly by the pressure of the compressed air, and then the drill point is driven to rotate together, so that teeth of a patient can be cut at the moment.

Further, referring to fig. 2 and 3, a bearing cover 35 is provided over the bearing 34, a retainer 36 is connected to the bearing 34 via a sleeve, and a gap exists between the retainer 36 and the bearing cover 35. Due to the high speed rotation of the rotor, the compressed air first enters the gap of the bearing 34, then through the gap between the ring and the bearing cover 35, and finally flows along the outer wall of the baffle ring 36 to the outside of the nose 3. In this way, by utilizing the cooperation among the bearing 34, the bearing cover 35 and the baffle ring 36, the compressed air flows to the outside of the handpiece 3 along the outer wall of the baffle ring 36 through the gap of the bearing 34 and then through the gap between the bearing cover 35 and the baffle ring 36, and the flowing air flow is guided to the radial direction along the boss direction set by the baffle ring 36 due to the high-speed rotation state of the mandrel, so that the possibility of emphysema occurrence is effectively reduced because the flowing air flow does not enter into the tissue of a patient through the front end of the handpiece 3.

It should be noted that, because the flow velocity of the compressed air is faster, the compressed air passes through the bearing 34 in the process of guiding out, so that the bearing 34 can be cooled by the compressed air in the process of guiding out the compressed air, the damage of the bearing 34 caused by the high-speed rotation of the wind wheel is reduced, and the service life of the bearing 34 is effectively prolonged.

Referring to fig. 2 and 3, the handpiece 3 is also internally provided with a first sealing assembly 4, the first sealing assembly 4 being arranged between the bearing cap 35 and the housing 32. The first sealing assembly 4 is used for ensuring tightness between the bearing cover 35 and the casing 32, so that compressed air can only flow out to the outside of the handpiece 3 through gaps of the bearing 34 and gaps between the bearing cover 35 and the baffle ring 36, thereby ensuring guiding stability.

Referring to fig. 2 and 3, the handpiece 3 further includes a second seal assembly 5, the second seal assembly 5 being disposed on the cover 38. The second sealing component 5 can improve the tightness of the front end of the machine head 3, prevent the compressed gas from flowing out of the machine cover 38, play a role in safety protection, and improve the possibility of no gas at the front end; by means of the arrangement of the first sealing assembly 4 and the second sealing assembly 5, the whole wind wheel cavity 31 is guaranteed to be in a relatively sealed environment except for a channel for guiding out compressed air, and therefore stability of the machine head 3 during operation is improved. The cover 38 is provided with a preformed hole 10 for facilitating the insertion of a needle removing tool to realize rapid needle removing work.

In this embodiment, the first seal assembly 4 and the second seal assembly 5 are not particularly limited, and the first seal assembly 4 and the second seal assembly 5 may be a plurality of O-rings, a plurality of spiral rings, or a combination of an O-ring and a spiral ring.

Referring to fig. 4, the handpiece 3 further includes a connector 37, and the connector 37 includes a straight head 371 and an elbow 372, the straight head 371 is connected with the handle 2, and the housing 32 is connected with the straight head 371 through the elbow 372. Through the cooperation of straight head 371 and elbow 372, both can satisfy the connection demand of aircraft nose 3, can also make aircraft nose 3 be the angle installation, and aircraft nose 3 and handle 2 are the angle setting promptly, have improved the flexibility ratio when aircraft nose 3 installs, and aircraft nose 3 can reach best operating angle, realizes the convenience of operation. Of course, in this embodiment, the straight head 371 and the elbow 372 are integrally formed.

Further, the straight head 371 is detachably connected to the handle 2. In this embodiment, the detachable means is preferably a threaded connection. Utilize the detachable connection design of straight head 371, can design into detachable aircraft nose 3, be convenient for the change of aircraft nose 3, maintenance, when the dental handpiece is not used moreover, can dismantle aircraft nose 3, be convenient for deposit. Of course, the threaded connection can improve the stability and the firmness of connection, and other connection modes meeting the requirements can be adopted according to actual conditions.

In particular, referring to fig. 1 and 2, the diameter of the stem 2 gradually becomes smaller from the end far from the straight head 371 to the end near the straight head 371, the diameter of the straight head 371 gradually becomes smaller from the end near the stem 2 to the end far from the stem 2, and the maximum diameter of the straight head 371 is smaller than the minimum diameter of the stem 2. Like this, keep away from straight head 371's one end to straight head 371 keep away from handle 2 one end, wholly be the circular cone form, on the one hand can improve holistic aesthetic property, on the other hand can save material, minimizes the use amount of material, correspondingly, has also reduced holistic quality, is convenient for handheld operation more, simultaneously because the reduction of material use amount also correspondingly has reduced manufacturing cost.

Referring to fig. 1, the handle 2 includes a front handle 21 and a rear handle 22, the front handle 21 and the rear handle 22 being detachably connected, wherein the front handle 21 is mainly used for a doctor to hold and the rear handle 22 is mainly used for connection. The machine handle 2 is divided into a front machine handle 21 and a rear machine handle 22, and on one hand, the machine handle 2 is divided into two smaller sections, so that the machine handle 2 is convenient to process; on the other hand, when the dental handpiece is not in use, the handle 2 can be disassembled, so that the whole volume can be reduced, and the dental handpiece is convenient to store. In this embodiment, the front handle 21 and the rear handle 22 are inserted.

The front machine handle 21 is provided with the anti-skid patterns 6, and the anti-skid patterns 6 can improve the friction force of the front machine handle 21, so that the machine handle is convenient for a person to operate and hold. It will be appreciated that the front handle 21 is of hollow design due to the need to thread through the inner conduit 1.

Referring to fig. 1 and 2, an intake passage 7 is formed in the rear handle 22, and the internal pipe 1 communicates with the intake passage 7. When the internal pipeline 1 is used, the internal pipeline 1 can be directly connected to the air inlet channel 7, compressed gas is introduced into the air inlet channel 7, the compressed gas flows through the air inlet channel and enters the internal pipeline 1, and the length of the internal pipeline 1 can be reduced by utilizing the air inlet channel 7 in the rear engine handle 22, so that the cost is saved.

Of course, other channels may be formed on the rear handle 22, for example: the system comprises a plurality of channels, a cooling gas channel and an exhaust channel, and can also be provided with a reserved channel. Thus, the internal space of the rear handle 22 can be fully utilized, the use of external pipelines is reduced, and the use is convenient and the cost can be saved.

Referring to fig. 1 and 2, the rear handle 22 includes a main body 221 and a connection seat 222, the connection seat 222 is connected to the main body 221, and an external thread 8 is formed on the connection seat 222. The machined threads are utilized to facilitate connection of the connection base 222 with other components, while the threads can improve stability, robustness and tightness during connection. Of course, the connecting seat 222 and the main body 221 may be integrally formed. In this embodiment, a specific description will not be given.

In this embodiment, the materials of the head 3 and the handle 2 are not described, and an appropriate material may be selected according to actual circumstances. Of course, the materials selected need to be safe in view of the particular environment in which the dental handpiece is used.

The embodiment of the application provides a dental handpiece with a airless front end, which is implemented by the following principle: when the medical treatment machine is used, a doctor holds the front machine handle 21 by hand, drills the teeth of a patient to be treated, external compressed air is introduced into the air inlet channel 7, the compressed air enters the internal pipeline 1 through the air inlet channel 7, then enters the wind wheel cavity 31 under the communication of the internal pipeline 1, the compressed air blows the wind wheel set 33 to rotate, and then drives the drill needle to rotate, meanwhile, the compressed air can pass through the gap of the bearing 34, then passes through the gap between the bearing cover 35 and the baffle ring 36, and finally flows to the outside of the machine head 3 along the outer wall of the baffle ring 36. Like this, with the compressed air in the wind wheel cavity 31 water conservancy diversion, make its outside that flows towards aircraft nose 3, no longer get into in the patient's tissue through the front end of aircraft nose 3, both satisfied the normal work demand of product, can avoid compressed air to flow out from the front end of dental handpiece, avoided the emergence of operation emphysema effectively, can also utilize compressed air to cool off bearing 34 simultaneously.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (10)

1. A dental handpiece with a front end free of air, characterized in that: the machine comprises a machine handle (2), an internal pipeline (1) and a machine head (3), wherein the internal pipeline (1) is arranged in the machine handle (2), the machine head (3) is connected to the machine handle (2), a wind wheel cavity (31) is formed in the machine head (3), the internal pipeline (1) is communicated with the wind wheel cavity (31), and compressed air enters the wind wheel cavity (31) through the internal pipeline (1);

The machine head (3) comprises a machine shell (32), a machine cover (38), a wind wheel group (33), a bearing (34), a bearing cover (35) and a baffle ring (36), wherein the machine cover (38) is connected with the machine shell (32), the machine cover (38) and the machine shell (32) jointly form a wind wheel cavity (31), the wind wheel group (33), the bearing (34) and the bearing cover (35) are both positioned in the wind wheel cavity (31), the bearing cover (35) is covered on the bearing (34), the baffle ring (36) is connected with the bearing (34) through a shaft sleeve, a gap exists between the baffle ring (36) and the bearing cover (35), the wind wheel group (33) is driven to rotate through compressed air, a mounting hole (9) for a drilling needle to pass through is formed in the wind wheel group (33), and the drilling needle is connected with the wind wheel group (33) and penetrates through the shaft sleeve.

2. The front end airless dental handpiece of claim 1, wherein: the handpiece (3) further comprises a first sealing assembly (4), the first sealing assembly (4) being arranged between the bearing cap (35) and the housing (32).

3. The front end airless dental handpiece of claim 2, wherein: the handpiece (3) further comprises a second sealing assembly (5), the second sealing assembly (5) being arranged on the cover (38).

4. The front end airless dental handpiece of claim 1, wherein: the machine head (3) further comprises a connector (37), the connector (37) comprises a straight head (371) and an elbow (372), the straight head (371) is connected with the machine handle (2), and the machine shell (32) is connected with the straight head (371) through the elbow (372).

5. The front end airless dental handpiece of claim 4, wherein: the straight head (371) is detachably connected with the machine handle (2).

6. The front end airless dental handpiece of claim 5, wherein: the diameter of the handle (2) is gradually reduced from one end far away from the straight head (371) to one end close to the straight head (371), the diameter of the straight head (371) is gradually reduced from one end close to the handle (2) to one end far away from the handle (2), and the maximum diameter of the straight head (371) is smaller than the minimum diameter of the handle (2).

7. The front end airless dental handpiece of claim 1, wherein: the handle (2) comprises a front handle (21) and a rear handle (22), and the front handle (21) and the rear handle (22) are detachably connected.

8. The front end airless dental handpiece of claim 7, wherein: an air inlet channel (7) is formed in the rear engine handle (22), and the inner pipeline (1) is communicated with the air inlet channel (7).

9. The front end airless dental handpiece of claim 8, wherein: the rear machine handle (22) comprises a main body (221) and a connecting seat (222), wherein the connecting seat (222) is connected with the main body (221), and external threads (8) are machined on the connecting seat (222).

10. The front end airless dental handpiece of claim 9, wherein: the front machine handle (21) is provided with anti-skid patterns (6).