TWM451947U - Dental handpiece structure - Google Patents
Dental handpiece structure Download PDFInfo
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- TWM451947U TWM451947U TW101225055U TW101225055U TWM451947U TW M451947 U TWM451947 U TW M451947U TW 101225055 U TW101225055 U TW 101225055U TW 101225055 U TW101225055 U TW 101225055U TW M451947 U TWM451947 U TW M451947U
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Description
本創作係與牙科手機之結構有關，特別是指一種可有效改善渦輪室內部之氣流場干擾情形，以及具有可二次衝擊渦輪葉面以提升氣流場效率，進而提升車削(cutting)動力之牙科手機結構。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.
按，習用之牙科手機，如第６圖所示，該牙科手機包括有一頭部９１，頭部９１內形成有一具向上開口之渦輪室９２，並於該渦輪室９２軸向容設有一可自由轉動之轉子９３，再以一旋蓋９４對應旋鎖於該渦輪室９２之開口上；其中，該轉子９３末端向外延伸接設有一刀具９３１，如磨牙刀或鑽頭等各類型刀具，並於該轉子９３之中段位置具有由複數渦輪葉面組成之一傳動件９３２，使高壓氣體進入該渦輪室９２時可推動該傳動件９３２之渦輪葉面，以驅動該轉子９３沿其圓周方向轉動。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.
惟，習用之牙科手機於實際使用時，進入該渦輪室９２之高壓氣體於推動該傳動件９３２之渦輪葉面後，將朝各渦輪葉面間之缺口向上導出，然由於該旋蓋９４於朝向該渦輪室９２之端面係呈平面狀，而無可用以導流匯整高壓氣體之設計，因此向上導出之高壓氣體容易因直接衝撞到該旋蓋９４底部之端面而亂竄（如圖中箭頭所示），如此一來，勢必會對該渦輪室９２內之氣流場構成干擾，並導致旋轉阻力增加而造成扭力下降之缺點；再者，習用之牙科手機其渦輪室９２之氣體很快就會排出，因此並無法達到使高壓氣體二次衝擊渦輪葉面，以提升氣流場作功效率之功效。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.
有鑑於此，故，本案創作人乃憑藉著從事相關產業之多年經驗，並經過不斷的苦思及試作後，才終於有本創作之產生。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.
本創作目的之一，在於提供一種牙科手機結構，其具有可有效改善渦輪室內部之氣流場干擾情形之功效。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.
本創作目的之二，在於提供一種牙科手機結構，其具有可二次衝擊渦輪葉面以提升氣流場作功效率，進而提升牙科手機車削(cutting)動力之功效。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.
為達前述之目的，本創作係提供一種牙科手機結構，包含有：For the purposes of the foregoing, the present invention provides a dental handpiece structure comprising:
一頭部，其內部形成有一渦輪室，該渦輪室之頂端具有一開口，而底端具有一穿孔，並於該渦輪室之內壁面設有一進氣孔以及一排氣孔；
一轉子，容設於該渦輪室中，該轉子具有一傳動軸，及一設於該傳動軸外周之傳動件，該傳動件由複數渦輪葉面依序環繞排列組成，且由該進氣孔進入該渦輪室之高壓氣體可相對推動該傳動件之各渦輪葉面，以帶動該轉子轉動，並於該傳動件各相鄰渦輪葉面之間分別具有一朝向該開口之缺口，使推動該傳動件之高壓氣體得由各該缺口導出；
一蓋體，對應蓋合於該渦輪室之開口上，並於該蓋體朝向該渦輪室之端面與該傳動件之間具有一沿圓周方向圈繞之環槽，該環槽與各該缺口呈相對設置，而可匯集經各該缺口導出之高壓氣體。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.
較佳地，該環槽凹設於該蓋體於朝向該渦輪室之端面上，且該環槽之底面呈凹弧狀。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.
更進一步地，該傳動件於相對遠離該開口之一端環設有一擋緣，並於該蓋體上具有一按鈕，該按鈕朝相對遠離該環槽之方向凸設，且該按鈕之周緣設有一以上之缺槽。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.
再者，該排氣孔具有一朝向該轉子轉動方向延伸之凹陷段，並於該傳動件之各渦輪葉面朝向該開口之端緣分別凹設有一呈圓弧狀之導槽，且該排氣孔之凹陷段與各渦輪葉面之導槽呈相對設置而在位同一水平高度位置。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.
而本創作之上述目的與優點，不難從下述所選用實施例之詳細說明與附圖中，獲得深入了解。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.
當然，本創作在某些另件上，或另件之安排上容許有所不同，但所選用之實施例，則於本說明書中，予以詳細說明。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.
首先請參照第１～２圖，本創作提供一種牙科手機結構，其主要由一頭部１１、一轉子２１及一蓋體３１所組成，其中：
該頭部１１，其內部形成有一渦輪室１２，該渦輪室１２之頂端具有一開口１２１，而底端具有一穿孔１２２，並於該渦輪室１２之內壁面設有一進氣孔１３以及一排氣孔１４，且該頭部１１後端向外延伸有一可供人手握持之握持部１５。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.
該轉子２１，經該渦輪室１１之開口１２１軸向容設於該渦輪室１２中，該轉子２１具有一傳動軸２２及一傳動件２３，該傳動軸２２末端供組設有一穿經該穿孔１２２而凸伸於該渦輪室１２外部之刀具２２１，該刀具２２１可為各類型之磨牙刀或鑽頭，而該傳動件２３由複數渦輪葉面２３１依序環繞排列於該轉子２１外周所組成，另於該傳動件２３上下分別套接有一軸承２４，且該傳動件２３於相對遠離該開口１２１之底端環設有一擋緣２３２，並於該傳動件２３各相鄰渦輪葉面２３１之間分別具有一朝向該開口１２１之缺口２５，且由該進氣孔１３進入該渦輪室１２之高壓氣體可相對推動該傳動件２３之各渦輪葉面２３１，以帶動該轉子２１轉動，並於該傳動件２３之各渦輪葉面２３１朝向該開口１２１之端緣分別凹設有一呈圓弧狀之導槽２３３，而該排氣孔１４具有一朝向該轉子２１轉動方向延伸之凹陷段１４１，且該排氣孔１４之凹陷段１４１係與各渦輪葉面２３１上之導槽２３３呈相對設置而位在同一水平高度位置。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.
該蓋體３１，對應蓋合於該渦輪室１２之開口１２１上，並於該蓋體３１朝向該渦輪室１２之端面與該傳動件２３之間具有一沿圓周方向圈繞之環槽３２，且該環槽３２與各該缺口２５呈相對設置，而可匯集經各該缺口２５導出之高壓氣體。於本實施例中，該環槽３２以圓周方向圈繞凹設於該蓋體３１朝向該渦輪室１２之端面上，且該環槽３２之底面呈凹弧狀，並於該蓋體３１上具有一按鈕３３，該按鈕３３與該蓋體３１之間夾設有一彈性件３４，使該按鈕３３朝相對遠離該環槽３２之方向凸設，並於該按鈕３３之周緣開設有複數個之缺槽３３１。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.
而藉由上述結構所組成之本創作於實際使用時，如第３圖所示，當高壓氣體經該進氣孔１３打入該渦輪室１２時，即可相對推動該傳動件２３之各渦輪葉面２３１，以帶動該轉子２１並連動其刀具２２１轉動，並由於該傳動件２３底端受該擋緣２３２之擋止，因此推動該傳動件２３各渦輪葉面２３１後之高壓氣體，僅能沿各渦輪葉面２３１之周壁順勢由各相鄰渦輪葉面２３１間之缺口２５向上導出；接著，經各該缺口２５導出之高壓氣體，即可受與各該缺口２５呈相對設置之環槽３２導引匯集，且由於該環槽３２之底面係呈圓弧狀，而使氣流可更為順暢地沿著該環槽３２流動，以有效減少高壓氣體亂竄之現象，而少部份進入該蓋體３１中之高壓氣體更可經由該按鈕３３之缺槽３３１向外排出，並藉此更可有效避免高壓氣體再次回流至該渦輪室１２內，以確保該渦輪室１２之氣流場不受干擾。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.
接著請繼續參閱第４、５圖，導入該環槽３２之高壓氣體，將沿該轉子２１之轉動方向朝後方流動，其部份之高壓氣體將進入該排氣孔１４予以導出，另一部份之高壓氣體（如圖中虛線箭頭所示）則會受該排氣孔１４呈凹弧狀之凹陷段１４１導引，而經由與該凹陷段１４１在同一水平高度位置之導槽２３３再次導入於該傳動件２３之各渦輪葉面２３１之間，以可達到二次衝擊渦輪葉面２３１之功效，並藉此使本創作更具有可大幅提升該渦輪室氣流場作功效率，進而提升牙科手機車削(cutting)動力之功效。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.
惟，以上所述實施例之揭示係用以說明本創作，並非用以限制本創作，故舉凡等效元件之置換仍應隸屬本創作之範疇。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.
綜上所述，係可使熟知本項技藝者明瞭本創作的確可達成前述目的，實已符合專利法之規定，故本案創作人爰依法提出專利申請。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.
（習用部分）(customized part)
９１‧‧‧頭部
９２‧‧‧渦輪室91‧‧‧ head 92‧‧ ‧ turbine room
９３‧‧‧轉子
９３１‧‧‧刀具93‧‧‧Rotor 931‧‧ Tools
９３２‧‧‧傳動件
９４‧‧‧旋蓋932‧‧‧ Transmission parts 94‧‧‧ screw cap
（本創作部份）(this part of the creation)
１１‧‧‧頭部
１２‧‧‧渦輪室11‧‧‧ head 12‧‧ ‧ turbine room
１２１‧‧‧開口
１２２‧‧‧穿孔121‧‧‧ openings 122‧‧‧ perforation
１３‧‧‧進氣孔
１４‧‧‧排氣孔13‧‧‧Air intake hole 14‧‧‧ vent hole
１４１‧‧‧凹陷段
１５‧‧‧握持部141‧‧‧The concave section 15‧‧‧ grip
２１‧‧‧該轉子
２２‧‧‧傳動軸21‧‧‧The rotor 22‧‧‧ drive shaft
２２１‧‧‧刀具
２３‧‧‧傳動件221‧‧‧Tools 23‧‧‧ Transmission parts
２３１‧‧‧渦輪葉面
２３２‧‧‧擋緣231‧‧‧ Turbine foliage 232‧‧ ‧ rim
２３３‧‧‧導槽
２４‧‧‧軸承233‧‧‧ Guide groove 24‧‧‧ bearing
２５‧‧‧缺口
３１‧‧‧蓋體25‧‧‧ gap 31‧‧‧ cover
３２‧‧‧環槽
３３‧‧‧按鈕32‧‧‧ Ring groove 33‧‧‧ button
３３１‧‧‧缺槽
３４‧‧‧彈性件331‧‧‧ Missing slot 34‧‧‧ elastic parts
第１圖係本創作之分解圖。Figure 1 is an exploded view of the creation.
第２圖係本創作組裝後之剖面示意圖。Figure 2 is a schematic cross-sectional view of the original assembly.
第３圖係本創作之使用狀態示意圖第，係用以顯示當高壓氣體打入渦輪室時之氣流狀態。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.
第４圖係本創作之使用狀態示意圖，係用以顯示當導入環槽之高壓氣體，沿轉子之轉動方向朝後方流動時之氣流狀態。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.
第５圖係本創作之使用狀態示意圖，係用以顯示經導槽而再次導入各渦輪葉面時之氣流狀態。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.
第６圖係習用牙科手機之結構示意圖。Figure 6 is a schematic view of the structure of a conventional dental handpiece.
11‧‧‧頭部 11‧‧‧ head
12‧‧‧渦輪室 12‧‧‧ turbine room
121‧‧‧開口 121‧‧‧ openings
122‧‧‧穿孔 122‧‧‧Perforation
13‧‧‧進氣孔 13‧‧‧Air intake
14‧‧‧排氣孔 14‧‧‧ venting holes
141‧‧‧凹陷段 141‧‧‧ recessed section
15‧‧‧握持部 15‧‧‧ grip
21‧‧‧該轉子 21‧‧‧The rotor
22‧‧‧傳動軸 22‧‧‧ drive shaft
221‧‧‧刀具 221‧‧‧Tools
23‧‧‧傳動件 23‧‧‧ Transmission parts
231‧‧‧渦輪葉面 231‧‧‧ Turbine foliage
232‧‧‧擋緣 232‧‧ ‧ rim
233‧‧‧導槽 233‧‧ ‧ guide slot
24‧‧‧軸承 24‧‧‧ bearing
25‧‧‧缺口 25‧‧ ‧ gap
31‧‧‧蓋體 31‧‧‧ Cover
32‧‧‧環槽 32‧‧‧ Ring groove
33‧‧‧按鈕 33‧‧‧ button
331‧‧‧缺槽 331‧‧‧ Missing slot
34‧‧‧彈性件 34‧‧‧Flexible parts
Claims (6)
一頭部，其內部形成有一渦輪室，該渦輪室之頂端具有一開口，而底端具有一穿孔，並於該渦輪室之內壁面設有一進氣孔以及一排氣孔；
一轉子，容設於該渦輪室中，該轉子具有一傳動軸，及一設於該傳動軸外周之傳動件，該傳動件由複數渦輪葉面依序環繞排列組成，且由該進氣孔進入該渦輪室之高壓氣體可相對推動該傳動件之各渦輪葉面，以帶動該轉子轉動，並於該傳動件各相鄰渦輪葉面之間分別具有一朝向該開口之缺口，使推動該傳動件之高壓氣體得由各該缺口導出；
一蓋體，對應蓋合於該渦輪室之開口上，並於該蓋體朝向該渦輪室之端面與該傳動件之間具有一沿圓周方向圈繞之環槽，該環槽與各該缺口呈相對設置，而可匯集經各該缺口導出之高壓氣體。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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101225055U TWM451947U (en) | 2012-12-25 | 2012-12-25 | Dental handpiece structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101225055U TWM451947U (en) | 2012-12-25 | 2012-12-25 | Dental handpiece structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| TWM451947U true TWM451947U (en) | 2013-05-01 |
Family
ID=49078412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW101225055U TWM451947U (en) | 2012-12-25 | 2012-12-25 | Dental handpiece structure |
Country Status (1)
| Country | Link |
|---|---|
| TW (1) | TWM451947U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106580484A (en) * | 2016-12-30 | 2017-04-26 | 宁波和平鸽口腔医疗器材有限公司 | Disinfection-free pneumatic turbine handpiece |
-
2012
- 2012-12-25 TW TW101225055U patent/TWM451947U/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106580484A (en) * | 2016-12-30 | 2017-04-26 | 宁波和平鸽口腔医疗器材有限公司 | Disinfection-free pneumatic turbine handpiece |
| CN106580484B (en) * | 2016-12-30 | 2022-05-06 | 宁波和平鸽口腔医疗器材有限公司 | Disinfection-free pneumatic turbine head |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK4K | Expiration of patent term of a granted utility model |