TWM451947U - Dental handpiece structure - Google Patents

Description

Dental phone structure

This creation is related to the structure of the dental handpiece, especially one that can effectively improve the airflow field interference inside the turbine interior, and the dental that can impact the turbine blade surface twice to improve the airflow field efficiency and thus improve the cutting power. Phone structure.

According to the conventional dental handpiece, as shown in FIG. 6, the dental handpiece includes a head 91 having an upwardly opening turbine chamber 92 formed therein, and a freely axially accommodated in the turbine chamber 92. The rotating rotor 93 is further screwed to the opening of the turbine chamber 92 by a screw cap 94; wherein a distal end of the rotor 93 is extended with a cutter 931, such as a cutter or a drill bit, and The middle portion of the rotor 93 has a transmission member 932 comprised of a plurality of turbine blades that allow the high pressure gas to enter the turbine chamber 92 to urge the turbine blades of the transmission member 932 to drive the rotor 93 to rotate in its circumferential direction.

However, when the conventional dental handpiece is in actual use, the high pressure gas entering the turbine chamber 92 pushes the turbine blade surface of the transmission member 932, and then leads upward toward the gap between the turbine blades, but since the screw cover 94 is The end surface facing the turbine chamber 92 is planar, and there is no design for guiding the high-pressure gas to be guided, so that the upwardly-derived high-pressure gas is easily smashed by directly colliding with the end surface of the bottom of the screw cap 94 (as shown in the figure). As shown by the arrow, this will inevitably interfere with the airflow field in the turbine chamber 92, and cause the rotation resistance to increase and cause the torque to drop. Further, the conventional dental handpiece has a gas in the turbine chamber 92. It will be discharged, so it is impossible to achieve the effect of causing the high pressure gas to impact the turbine blade surface twice to improve the efficiency of the airflow field.

In view of this, the creators of this case have relied on years of experience in related industries, and after continuous hard work and trials, they finally have this creation.

One of the purposes of the present invention is to provide a dental handpiece structure that has the effect of effectively improving the airflow field interference inside the turbine chamber.

The second objective of the present invention is to provide a dental handpiece structure, which has the effect of second impacting the turbine blade surface to improve the efficiency of the airflow field, thereby improving the cutting power of the dental handpiece.

For the purposes of the foregoing, the present invention provides a dental handpiece structure comprising:

a head portion having a turbine chamber formed therein, the turbine chamber having an opening at the top end and a through hole at the bottom end, and an air inlet hole and a vent hole in the inner wall surface of the turbine chamber;
a rotor is disposed in the turbine chamber, the rotor has a transmission shaft, and a transmission member disposed on an outer circumference of the transmission shaft, the transmission member is composed of a plurality of turbine blades arranged in a sequence, and the air inlet hole The high pressure gas entering the turbine chamber can relatively push the turbine blades of the transmission member to drive the rotor to rotate, and each of the adjacent turbine blade surfaces of the transmission member has a gap facing the opening, so as to push the The high pressure gas of the transmission member is derived from each of the notches;
a cover body correspondingly covers the opening of the turbine chamber, and has a circumferential groove around the end surface of the cover body facing the turbine chamber and the transmission member, the ring groove and each of the notches In a relative arrangement, the high pressure gas derived through each of the gaps can be collected.

Preferably, the annular groove is recessed on the end surface of the cover body facing the turbine chamber, and the bottom surface of the annular groove is concavely curved.

Further, the transmission member is provided with a retaining edge at one end of the opening away from the opening, and has a button on the cover, the button is protruded away from the annular groove, and a periphery of the button is provided with a button The above is missing.

Further, the venting hole has a recessed section extending toward the rotating direction of the rotor, and each of the turbine blade faces of the transmission member is recessed with an arc-shaped guiding groove toward the end edge of the opening, and the row The recessed section of the air hole is disposed opposite to the guide groove of each turbine blade surface at the same level position.

The above objects and advantages of the present invention are not difficult to understand from the detailed description of the selected embodiments and the accompanying drawings.

Of course, this creation is allowed to differ on certain parts or arrangements of parts, but the selected embodiments are described in detail in this specification.

First, please refer to Figures 1 to 2, the present invention provides a dental handpiece structure, which is mainly composed of a head 11, a rotor 21 and a cover 31, wherein:
The head portion 11 has a turbine chamber 12 formed therein. The top end of the turbine chamber 12 has an opening 121, and the bottom end has a through hole 122. The inner wall surface of the turbine chamber 12 is provided with an air inlet hole 13 and a row. The air hole 14 and the rear end of the head 11 extend outwardly with a grip portion 15 that can be gripped by a human hand.

The rotor 21 is axially received in the turbine chamber 12 via the opening 121 of the turbine chamber 11. The rotor 21 has a transmission shaft 22 and a transmission member 23, and the end of the transmission shaft 22 is provided with a through hole. a cutter 221 protruding from the outside of the turbine chamber 12, the cutter 221 being a cutter or a drill of various types, and the transmission member 23 is composed of a plurality of turbine blade faces 231 sequentially arranged around the outer circumference of the rotor 21, Further, a bearing 24 is sleeved on the upper and lower sides of the transmission member 23, and the transmission member 23 is provided with a retaining edge 232 at a bottom end of the transmission member 23, and between the adjacent turbine blade surfaces 231 of the transmission member 23. There is a notch 25 facing the opening 121, and the high-pressure gas entering the turbine chamber 12 from the air inlet 13 can relatively push the turbine blade surface 231 of the transmission member 23 to drive the rotor 21 to rotate. Each of the turbine blade faces 231 of the transmission member 23 is concavely disposed with an arc-shaped guide toward the end edge of the opening 121. 233, the venting opening 14 has a recessed section 141 extending toward the rotating direction of the rotor 21, and the recessed section 141 of the venting opening 14 is disposed opposite to the guiding slot 233 of each turbine blade surface 231. The same level position.

The cover body 31 is correspondingly closed to the opening 121 of the turbine chamber 12, and has a circumferential groove 52 around the end surface of the cover 31 facing the turbine chamber 12 and the transmission member 23, The annular groove 32 is disposed opposite to each of the notches 25, and the high-pressure gas discharged through each of the notches 25 can be collected. In this embodiment, the annular groove 32 is circumferentially wound around the end surface of the cover body 31 facing the turbine chamber 12, and the bottom surface of the annular groove 32 is concavely curved, and is disposed on the cover body 31. There is a button 33, and an elastic member 34 is interposed between the button 33 and the cover 31, so that the button 33 protrudes away from the ring groove 32, and a plurality of the buttons 33 are opened on the periphery of the button 33. Missing slot 331.

When the present invention consists of the above structure, in actual use, as shown in FIG. 3, when high-pressure gas is driven into the turbine chamber 12 through the intake hole 13, the turbine of the transmission member 23 can be relatively pushed. The leaf surface 231 drives the rotor 21 and rotates the cutter 221 thereof, and the bottom end of the transmission member 23 is blocked by the retaining edge 232, thereby pushing the high pressure gas behind the turbine blade surface 231 of the transmission member 23, only The peripheral wall of each of the turbine blade surfaces 231 can be outwardly led out from the gaps 25 between the adjacent turbine blade faces 231. Then, the high-pressure gas discharged through each of the notches 25 can be received by the ring opposite to each of the notches 25. The groove 32 guides the collection, and since the bottom surface of the annular groove 32 is arc-shaped, the airflow can flow more smoothly along the annular groove 32, so as to effectively reduce the phenomenon of high-pressure gas scrambling, and a small part The high-pressure gas entering the cover 31 can be further discharged outward through the notch 331 of the button 33, and thereby the high-pressure gas can be effectively prevented from being returned to the turbine chamber again. 2, to ensure that the gas flow field 12 of the turbine chamber undisturbed.

Next, please continue to refer to Figures 4 and 5, and the high-pressure gas introduced into the annular groove 32 will flow backward along the direction of rotation of the rotor 21, and part of the high-pressure gas will enter the vent hole 14 for export, and the other portion The high-pressure gas (shown by the dashed arrow in the figure) is guided by the concave portion 141 of the vent hole 14 in a concave arc shape, and is introduced again through the guide groove 233 at the same level position as the concave portion 141. Between the turbine blade faces 231 of the transmission member 23, the effect of the second impact turbine blade surface 231 can be achieved, and thereby the creation can further improve the efficiency of the airflow field of the turbine chamber, thereby improving the dental function. Mobile phone turning power.

However, the above description of the embodiments is intended to illustrate the present invention and is not intended to limit the present invention, so the replacement of equivalent elements should still be within the scope of the present invention.

To sum up, it is possible for the person skilled in the art to understand that the creation of the creation can indeed achieve the aforementioned objectives, and it has already met the requirements of the Patent Law. Therefore, the creator of the case filed a patent application according to law.

(customized part)

91‧‧‧ head 92‧‧ ‧ turbine room

93‧‧‧Rotor 931‧‧ Tools

932‧‧‧ Transmission parts 94‧‧‧ screw cap

(this part of the creation)

11‧‧‧ head 12‧‧ ‧ turbine room

121‧‧‧ openings 122‧‧‧ perforation

13‧‧‧Air intake hole 14‧‧‧ vent hole

141‧‧‧The concave section 15‧‧‧ grip

21‧‧‧The rotor 22‧‧‧ drive shaft

221‧‧‧Tools 23‧‧‧ Transmission parts

231‧‧‧ Turbine foliage 232‧‧ ‧ rim

233‧‧‧ Guide groove 24‧‧‧ bearing

25‧‧‧ gap 31‧‧‧ cover

32‧‧‧ Ring groove 33‧‧‧ button

331‧‧‧ Missing slot 34‧‧‧ elastic parts

Figure 1 is an exploded view of the creation.

Figure 2 is a schematic cross-sectional view of the original assembly.

Fig. 3 is a schematic view showing the state of use of the present invention, showing the state of the airflow when high pressure gas is driven into the turbine chamber.

Fig. 4 is a schematic view showing the state of use of the present invention, which is used to show the state of the airflow when the high-pressure gas introduced into the ring groove flows backward in the direction of rotation of the rotor.

Fig. 5 is a schematic view showing the state of use of the present invention, which is used to display the state of the airflow when the turbine blades are reintroduced through the guide grooves.

Figure 6 is a schematic view of the structure of a conventional dental handpiece.

11‧‧‧ head

12‧‧‧ turbine room

121‧‧‧ openings

122‧‧‧Perforation

13‧‧‧Air intake

14‧‧‧ venting holes

141‧‧‧ recessed section

15‧‧‧ grip

21‧‧‧The rotor

22‧‧‧ drive shaft

221‧‧‧Tools

23‧‧‧ Transmission parts

231‧‧‧ Turbine foliage

232‧‧ ‧ rim

233‧‧ ‧ guide slot

24‧‧‧ bearing

25‧‧ ‧ gap

31‧‧‧ Cover

32‧‧‧ Ring groove

33‧‧‧ button

331‧‧‧ Missing slot

34‧‧‧Flexible parts

Claims (6)

A dental handpiece structure comprising:
a head portion having a turbine chamber formed therein, the turbine chamber having an opening at the top end and a through hole at the bottom end, and an air inlet hole and a vent hole in the inner wall surface of the turbine chamber;
a rotor is disposed in the turbine chamber, the rotor has a transmission shaft, and a transmission member disposed on an outer circumference of the transmission shaft, the transmission member is composed of a plurality of turbine blades arranged in a sequence, and the air inlet hole The high pressure gas entering the turbine chamber can relatively push the turbine blades of the transmission member to drive the rotor to rotate, and each of the adjacent turbine blade surfaces of the transmission member has a gap facing the opening, so as to push the The high pressure gas of the transmission member is derived from each of the notches;
a cover body correspondingly covers the opening of the turbine chamber, and has a circumferential groove around the end surface of the cover body facing the turbine chamber and the transmission member, the ring groove and each of the notches In a relative arrangement, the high pressure gas derived through each of the gaps can be collected. The dental handpiece structure of claim 1, wherein the annular groove is circumferentially wound around the cover body toward the end surface of the turbine chamber. The dental handpiece structure of claim 1 or 2, wherein the bottom surface of the ring groove is concavely curved. The dental handpiece structure of claim 1, wherein the transmission member is provided with a retaining edge at an end ring that is relatively far from the opening. The handpiece structure of claim 1, wherein the cover has a button, the button is protruded away from the ring groove, and more than one slot is provided at a periphery of the button. The dental handpiece structure of claim 1, wherein the venting hole has a concave section extending toward the rotating direction of the rotor, and each of the turbine blade faces of the transmission member is concavely disposed with an arc toward the end edge of the opening. The guide groove of the shape, and the concave section of the vent hole is disposed opposite to the guide groove of each turbine blade surface and is located at the same horizontal position.