TWM614000U - Rear exhaust dental handpiece - Google Patents

Abstract

A rear exhaust dental handpiece, comprising a holding part, a head, and a rotating part. The holding part is generally elongated. The head is arranged at one end of the holding part and surrounds a accommodating space. , And includes a bottom wall provided with a perforation, the rotating part includes a rotor provided in the accommodating space, and a rotating shaft connected to the rotor and passing through the perforation, the perforated wall and the The rotating shaft is tightly fitted to prevent the air in the accommodating space from escaping from the perforation, and can prevent the high-pressure air from being poured into the cavity of the drilled tooth and into the body tissue.

Description

Rear exhaust dental handpiece

The present invention relates to a dental handpiece, in particular to a post-exhaust dental handpiece which can avoid blowing air to the wound.

Dental handpiece (Dental handpiece), also known as dental drill, is the most commonly used medical equipment in dental clinical treatment. The dental handpiece uses the principle of rapid rotation and is applied to the five basic steps in the dentist's office, including: cutting, turning and grinding , Sanding, trimming and polishing.

The types of dental handpieces can be divided into AC electric type, hydraulic drive type, pneumatic power type, or belt driven type, which includes a foot control pedal that controls speed and rotation direction, and is used for difficult-to-reach teeth The corner structure of the part can be used to prepare and fill the cavity of the tooth, or to clean the tooth.

Among them, the pneumatic powered dental handpiece is relatively simple in structure, relatively low in cost, and relatively fast in maintenance and replacement compared to other types of dental handpieces. Therefore, many dentists will exhaust the dental handpiece after using it.

Please refer to FIG. 1. The early pneumatic dental handpiece 1 includes a holding portion 11 and a head 12 arranged at one end of the holding portion 11. A setting surface 121 of the head 12 is penetrated with a rotating rod 122. There are some gaps or holes on the setting surface 121. When the gas drives the rotor inside the pneumatic dental handpiece 1 to rotate to drive the rotating rod 122 to rotate, the high-pressure airflow 123 will be discharged from the gaps or holes, and the setting surface 121 is just facing the cavity of the tooth that is being drilled, causing air to enter the human tissue from the cavity of the tooth, which will cause subcutaneous emphysema (English: Subcutaneous emphysema).

For example, a patient had a tooth extraction in the clinic a few days ago. Afterwards, his neck was swollen and he had difficulty breathing. When he pressed down on the swollen part, he showed symptoms such as the sound of pressing a bumper plastic sheet. In addition, he swallowed and breathed harder. The more difficult it was. After seeking medical treatment, it was found that the patient’s neck subcutaneous and chest mediastinum had emphysema. It was concluded that a pneumatic-powered dental handpiece was used for tooth extraction at the time, and air was injected into the patient’s body from the wound. If the treatment is delayed, it may cause sepsis. .

Therefore, the current pneumatic powered dental handpieces have the following disadvantages:

1. Air blow to the wound:

Pneumatically powered dental handpieces have some gaps or holes on the setting surface of the drilling tool, which will spray air out and face the cavity of the tooth, causing the air to enter the human tissue through the cavity of the tooth.

2. The speed cannot be increased:

Since pneumatic powered dental handpieces must use high-pressure airflow to drive the rotating shaft to rotate, when the exhaust hole is closed, the air flow will not be smooth enough, which will affect the rotation speed and force of the drilling tool.

3. Too large:

If the vent hole is closed, the head of the dental handpiece must be provided with an additional air duct structure for the air to circulate smoothly. However, the additional setting of the exhaust structure will increase the volume of the head of the dental handpiece and become unusable. For patients with narrow mouth.

Therefore, how to avoid venting body gas to the wound during dental treatment while maintaining the rotating speed of the drilling tool while reducing the volume is an urgent goal for the relevant technicians.

In view of this, the object of the present invention is to provide a rear exhaust dental handpiece, which includes a holding part, a head, and a rotating part.

The grip is generally elongated.

The head is arranged at one end of the holding part, and an accommodating space is arranged inside. The head includes a bottom wall provided with a perforation, and the bottom wall can block the air in the accommodating space.

The rotating part includes a rotor arranged in the accommodating space, and a rotating shaft connected to the rotor and penetrating outward from the perforation. The wall of the perforation is tightly matched with the rotating shaft to avoid the accommodating space The air escapes from the perforation.

Another technical means of the present invention is that an air supply channel communicating with the accommodating space is provided in the above-mentioned holding portion, and the air supply channel is used for supplying pressurized gas that drives the rotor to rotate.

Another technical means of the present invention is that an exhaust passage communicating with the accommodating space is provided in the above-mentioned holding portion, and the exhaust passage can allow the air in the accommodating space to be discharged outward.

Another technical means of the present invention is that the above-mentioned head further includes a surrounding wall connected with the holding portion, a top wall connected with the surrounding wall and arranged opposite to the bottom wall, and a top wall arranged on the top The first vent of the wall.

Another technical means of the present invention is that the above-mentioned rotating part further includes a plurality of blades arranged on the rotor, and a wind deflector arranged on the bottom of the plurality of blades, and the wind deflector is tightly fitted with the surrounding wall.

Another technical method of the present invention is that the above-mentioned rotating part further includes a bearing which is arranged on and below the rotor.

Another technical means of the present invention is that the above-mentioned rotating part further includes two sealing rubber rings respectively arranged on the outer edges of the two bearings.

Another technical means of the present invention is that the above-mentioned head further includes a positioning body arranged in the accommodating space and abutting against the bottom wall, and the lower positioning body is used for fixing the bearing located below the rotor.

Another technical means of the present invention is that the above-mentioned head further includes an upper positioning body arranged above the rotor, and the upper positioning body is used to fix the bearing above the rotor.

Another technical method of the present invention is that the above-mentioned head further includes a second exhaust hole arranged on the upper positioning body.

The beneficial effect of the present invention is that the bottom wall of the head has a certain thickness, and the outer diameter of the rotating shaft is tightly matched with the inner wall of the perforation, so that air is not easy to flow through the gap between the rotating shaft and the bottom wall, which can avoid High-pressure gas is sprayed to the teeth under treatment. The high-pressure gas in the accommodating space can be discharged from the first exhaust hole on the top wall. It is a post-exhaust dental handpiece, which eliminates the need for an additional air guide structure in the head , In order to effectively reduce the volume of the head and maintain the speed of the rotor.

The characteristics and technical content of the patent application related to the present model will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings.

Refer to Figure 2, Figure 3, and Figure 4, which is a preferred embodiment of a new type of rear exhaust dental handpiece 3. The rear exhaust dental handpiece 3 includes a holding portion 31, a head 32, and a rotating部33.

The holding portion 31 is generally elongated and can be held by the hand. The holding portion 31 is provided with an air supply channel 311 and an exhaust channel 312.

The head 32 is disposed at one end of the holding portion 31. The head 32 is provided with an accommodating space 321, and includes a surrounding wall 322, a bottom wall 323 connected to the bottom edge of the surrounding wall 322, and a bottom wall 323 connected to the bottom edge of the surrounding wall 322. A top wall 324 connected around the top edge of the wall 322, a through hole 325 provided on the bottom wall 323, a plurality of first exhaust holes 326 provided on the top wall 324, and a first exhaust hole 326 provided at the bottom of the accommodating space 321 and the bottom wall 323 is connected to a lower positioning body 327 at the bottom, an upper positioning body 328 arranged at the top of the accommodating space 321 and connected to the top wall 324, and a plurality of second exhaust holes 329 arranged on the upper positioning body 328, wherein, The accommodating space 321 is a space defined by the surrounding wall 322, the bottom wall 323, and the top wall 324 surrounding each other.

With reference to FIG. 5, the rotating portion 33 includes a rotor 331 disposed in the accommodating space 321, a rotating shaft 332 connected to the rotor 331 and passing out through the through hole 325, and a plurality of rotors 331 disposed on the rotor 331 The blades 333, a wind deflector 334 arranged at the bottom of the plurality of blades 333, two bearings 335 arranged above and below the rotor 331, and two sealing rubber rings 336 arranged on the outer edges of the two bearings 335 respectively.

The accommodating space 321 communicates with the air supply passage 311 and the exhaust passage 312, and high-pressure air enters the accommodating space 321 from the air supply passage 311 and then is discharged from the exhaust passage 312 to enter the accommodating space The air fluid is formed in 321 to push the plurality of blades 333 and drive the rotor 331 to rotate. The bottom end of the rotor 331 can be connected with a drilling instrument to perform medical operations on the teeth. Because the drilling instrument is installed in a dental handpiece, the technology is The conventional technology is not the focus of the present invention, so it will not be described in detail here.

The hole wall of the perforation 325 is tightly fitted with the rotation shaft 332, that is to say, the space of the perforation 325 is filled by the rotation shaft 332, which can prevent the air in the accommodating space 321 from escaping from the perforation 325, and the rotation The shaft 332 can be rotated in the perforation 325. In addition, the surrounding wall 322 and the bottom wall 323 are integrally formed, except that the perforation 325 is not provided with other holes or gaps, which can prevent high-pressure air from leaking out. To prevent the wound from being invaded by air, the bottom wall 323 can also be screwed or installed at the bottom of the surrounding wall 322 in other ways in actual implementation, as long as the bottom wall is avoided 323 has cracks or holes that can eject air, and should not be limited to this. In addition, the structure of the bottom wall 323 can be a metal member, a rubber member, or a combination of metal and rubber, and the bottom wall 323 has A certain thickness, so that the perforation 325 has a certain depth, and when the rotating shaft 332 is disposed in the perforation 325, sufficient blocking force is generated to prevent air from being ejected from the accommodating space 321 from the perforation 325. .

Wherein, the wind deflector 334 disposed under the plurality of blades 333 can block the air in the plurality of blades 333, and the outer edge of the wind deflector 334 slightly abuts the surrounding wall 322, so that the rotor 331 can The wind deflector 334 is driven to rotate in the accommodating space 321 and can block the air between the plurality of blades 333 from flowing to the bottom wall 323, so that the air in the accommodating space 321 can flow to the exhaust passage 312, the The first exhaust hole 326 and the second exhaust hole 329.

In the preferred embodiment, the upper positioning body 328 is screwed on the top of the surrounding wall 322, and the top wall 324 is then disposed on the upper positioning body 328, and the upper positioning body 328 can press the two bearings. 335. To fix the position of the rotating shaft 332, in actual implementation, other positioning structures can be used, and should not be limited to this.

Since the surrounding wall 322 and the bottom wall 323 are integrally formed, the rotating part 33 cannot be installed from below the head 32, so the rotating part 33 is arranged by first installing the lower positioning body 327 in the container. The bottom of the space 321 is placed, and a sealing rubber ring 336 is placed in the recess of the lower positioning body 327, and then a bearing 335 is pushed into the lower positioning body 327 to fix the position of the bearing 335.

Then the rotor 331 provided with the rotating shaft 332 is inserted into the bearing 335 and the through hole 325, and at the same time another bearing 335 is arranged above the rotating shaft 332, and finally the positioning body 328 on which a sealing rubber ring 336 is arranged is surrounded The bearing 335 is screwed on the top of the surrounding wall 322 to fix the position of the two bearings 335, wherein the two sealing rubber ring 336 is a kind of rubber ring (o-ring) which can tightly fix and maintain the two bearings 335 Certain airtightness.

It is worth mentioning that the first exhaust hole 326 and the second exhaust hole 329 can exhaust the air in the accommodating space 321 in the opposite direction of the treatment tooth (exhaust direction 4), which can avoid The exhausted air is sprayed into the wound, so that the inside of the head 32 does not need to be provided with an air-guiding structure, which can effectively reduce the volume of the head 32, so that the rear exhaust dental handpiece 3 can extend into a smaller Dental treatment is performed in the oral cavity. In actual implementation, the rear exhaust dental handpiece 3 may not be provided with the first exhaust hole 326 and the second exhaust hole 329, which should not be limited thereto.

Wherein, the two bearings 335 can fix the position of the rotating shaft 332, so that the rotating shaft 332 can rotate stably without shaking, so as to stabilize the position of the rotating shaft 332 in the perforation 325, which can prevent the rotating shaft 332 from being The bottom wall 323 generates too much friction, which can not only reduce the wear caused by friction, but also maintain the tightness between the rotating shaft 332 and the bottom wall 323, so that the rotating shaft 332 can rotate in the through hole 325 and At the same time, it has the effect of blocking the passage of air.

It can be seen from the above description that the new type of rear exhaust dental handpiece 3 does have the following functions:

1. Prevent gas intrusion:

The surrounding wall 322 and the bottom wall 323 can block air, and the tight fit of the rotating shaft 332 and the perforation 325 can also effectively block air, so that the air in the accommodating space 321 will not escape from the surrounding wall 322 and the bottom wall. Leaking out at 323 can avoid spraying high-pressure gas to the teeth under treatment, and further prevent the gas from intruding into the body tissues from the wound.

2. Maintain the speed:

The first exhaust hole 326 provided on the top wall 324 and the second exhaust hole 329 provided on the upper positioning body 328 can allow the air in the accommodating space 321 to be discharged outward in the exhaust direction 4, which can push The airflow of the plurality of blades 333 is smooth and maintains the rotation of the rotor 331. The two bearings 335 can fix the position of the rotating shaft 332 so that the rotating shaft 332 rotates stably without shaking, so as to maintain the rotating shaft 332 and the rotating shaft 332. The tightness between the bottom walls 323 is such that the rotating shaft 332 maintains the rotating speed in the perforation 325 and at the same time has the effect of blocking the passage of air.

3. Miniaturization of volume:

The first exhaust hole 326, the second exhaust hole 329, and the exhaust passage 312 cooperate to allow the air in the accommodating space 321 to be discharged from the top wall 324 of the head 32 to make The head 32 does not need to be provided with an additional air-conducting channel structure, and the overall volume of the head 32 can be reduced, and dental treatment can be performed in a smaller oral cavity.

In summary, since the rotating shaft 332 is tightly fitted with the perforation 325, and the bottom wall 323 and the surrounding wall 322 are not provided with gaps and holes through which air can pass, the rear exhaust dental handpiece 3 can be prevented from colliding with each other. The tooth under treatment sprays air to prevent the gas from entering the human tissue from the wound, and the first exhaust hole 326 and the second exhaust hole 329 can direct the exhaust direction 4 to the opposite direction of the tooth under treatment, so that the The airflow in the accommodating space 321 is smooth, so as to maintain the rotation speed of the rotor 331, so the purpose of cost innovation can be achieved.

However, the above is only a preferred embodiment of the present model, and should not be used to limit the scope of implementation of the present model, that is, simple equivalent changes and modifications made in accordance with the scope of the patent application for the present model and the description of the model , Are still within the scope of this new patent.

1: Pneumatic powered dental handpiece 11: Grip 12: head 121: set face 122: Rotating lever 123: High-pressure airflow 3: Rear exhaust dental handpiece 31: Grip 311: gas supply channel 312: Exhaust Channel 32: head 321: accommodating space 322: Surrounding the Wall 323: Bottom Wall 324: top wall 325: Piercing 326: First vent 327: Lower Positioning Body 328: upper positioning body 329: second vent 33: Rotating part 331: Rotor 332: Rotation Axis 333: Blade 334: Windshield 335: Bearing 336: Sealing rubber ring 4: exhaust direction

Figure 1 is a schematic side view illustrating a general pneumatic powered dental handpiece; Figure 2 is a three-dimensional schematic diagram showing a preferred embodiment of a new type of rear exhaust dental handpiece, illustrating the three-dimensional configuration of the rear exhaust dental handpiece; FIG. 3 is a schematic partial top cross-sectional view illustrating the top cross-sectional state of a head in the preferred embodiment; Figure 4 is a partial schematic side sectional view illustrating the side sectional view of the head in the preferred embodiment; FIG. 5 is a perspective schematic diagram illustrating the three-dimensional configuration of a rotating part in the preferred embodiment.

3: Rear exhaust dental handpiece

31: Grip

311: gas supply channel

32: head

321: accommodating space

322: Surrounding the Wall

323: Bottom Wall

324: top wall

325: Piercing

326: First vent

327: Lower Positioning Body

328: upper positioning body

329: second vent

33: Rotating part

332: Rotation Axis

333: Blade

334: Windshield

335: Bearing

336: Sealing rubber ring

4: exhaust direction

Claims (10)

A rear exhaust dental handpiece, which contains: A grip part, generally in a long strip shape; A head, arranged at one end of the holding part and provided with an accommodating space inside, the head including a bottom wall provided with a perforation, the bottom wall can block the air in the accommodating space; and A rotating part includes a rotor arranged in the accommodating space, and a rotating shaft connected to the rotor and penetrating outward from the perforation. The wall of the perforation is tightly matched with the rotating shaft to avoid the accommodating space The air in the air escapes from the perforation. According to claim 1, a dental handpiece with exhaust gas afterwards, wherein the holding portion is provided with an air supply channel communicating with the accommodating space, and the air supply channel is used for supplying pressurized gas for driving the rotor to rotate. As described in claim 1, the dental handpiece is exhausted afterward, wherein the holding portion is provided with an exhaust passage communicating with the accommodating space, and the exhaust passage can allow the air in the accommodating space to be discharged outward. The rear exhaust dental handpiece according to claim 1, wherein the head further includes a surrounding wall connected with the holding portion, a top wall connected with the surrounding wall and arranged opposite to the bottom wall, and at least one The first exhaust hole is arranged on the top wall. As described in claim 4, the post-exhaust dental handpiece, wherein the rotating part further includes a plurality of blades disposed on the rotor, and a wind deflector disposed at the bottom of the plural blades, and the wind deflector tightly fits with the surrounding wall . As described in claim 1, wherein the rotating part further includes a bearing halved on the upper and lower sides of the rotor. According to claim 6, the post-exhaust dental handpiece, wherein the rotating part further includes two sealing rubber rings respectively arranged on the outer edges of the two bearings. According to claim 7, the rear exhaust dental handpiece, wherein the head further includes a positioning body arranged in the accommodating space and pressing against the bottom wall, and the lower positioning body is used to fix the bearing located below the rotor . As described in claim 7, the head part further includes an upper positioning body disposed above the rotor, and the upper positioning body is used to fix the bearing above the rotor. According to claim 9, the rear exhaust dental handpiece, wherein the head further includes at least one second exhaust hole provided on the upper positioning body.

Images