CN111938842B

CN111938842B - Dental handpiece with suck-back prevention function

Info

Publication number: CN111938842B
Application number: CN202010809780.XA
Authority: CN
Inventors: 何勤
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2021-07-20
Anticipated expiration: 2040-08-13
Also published as: CN111938842A

Abstract

The invention relates to the technical field of dental handpieces, and particularly discloses a dental handpiece with a back suction prevention function; the high-pressure electromagnetic valve comprises a handle, a machine head and a machine needle, wherein a jacket layer is arranged at the upper end of the outer circular surface of the machine head, one end of the handle is connected with the machine head and the jacket layer, a microprocessor is arranged on the outer surface of the handle, a high-pressure air connecting pipe is arranged at the outer end of the handle, a brake air pipe is connected onto the high-pressure air connecting pipe, a first miniature electromagnetic valve is arranged on the high-pressure air connecting pipe positioned on the inner side of the brake air pipe, a second miniature electromagnetic valve is arranged on the brake air pipe, and the first miniature electromagnetic valve and the second miniature electromagnetic valve are electrically connected with the microprocessor; the invention changes the trend of the air flow before stopping the supply of the high-pressure air, so that the kinetic energy of the gas accessed in a short time just offsets the self kinetic energy of the turbine part, thereby quickly realizing the braking of the turbine part, effectively avoiding the back suction of the waste liquid in the oral cavity of the patient caused by negative pressure in the process of stopping the supply of the air after the use of the prior dental handpiece, and having simple structure and stronger practicability.

Description

Dental handpiece with suck-back prevention function

Technical Field

The invention relates to the technical field of dental handpieces, and particularly discloses a dental handpiece with a suck-back prevention function.

Background

The dental handpiece is a common medical instrument for stomatology, and the working principle of the dental handpiece is that the high-pressure air pressure is utilized to blow the turbine to drive the lathe needle to run at a high speed, the rotating speed of the dental handpiece is usually up to 20 ten thousand revolutions per minute, and the requirements of doctors in stomatology on drilling and grinding teeth can be effectively met.

At present, the dental handpiece has a disposable dental handpiece and a dental handpiece which can be repeatedly used, the disposable dental handpiece has high use cost, and the dental handpiece which can be repeatedly used can be continuously used after being sterilized and a needle is replaced. However, according to the working principle of the dental handpiece, when the supply of high-pressure air is stopped, the impeller continues to rotate at a high speed due to inertia, so that negative pressure is generated inside the handpiece, and waste liquid such as cleaning liquid, blood and the like inside the oral cavity of a patient is sucked into the handpiece through the needle.

The invention with the patent number of CN103417305B discloses a dental handpiece, which comprises a handpiece and a handpiece body, wherein the tail end of the handpiece body is provided with an air inlet interface, an air outlet interface and an water inlet interface, the tail end of the handpiece body is also provided with an air inlet pipe joint, the air inlet pipe joint comprises an outer sleeve, a one-way valve, a first connecting pipe, a pressure stabilizing valve and a second connecting pipe, the one-way valve, the first connecting pipe, the pressure stabilizing valve and the second connecting pipe are sequentially connected in series to form a connecting pipe assembly, the connecting pipe assembly is arranged in the outer sleeve, the connecting pipe assembly is connected with the inner wall of the outer sleeve, the outer sleeve is connected with the tail end of the handpiece in a sleeved mode, one end, far away from the first connecting pipe, of the one-way valve is connected with the air inlet interface on the handpiece body, and the second connecting pipe, the air outlet interface and the water inlet interface all extend out of the outer sleeve. The invention is designed with the air inlet pipe joint, the one-way valve for controlling backflow is arranged in the air inlet pipe joint, so that the waste liquid can be prevented from flowing back to the air inlet pipe, but the dental handpiece can only prevent the waste liquid from flowing back to the air inlet pipe, and a large amount of waste liquid still flows back into the handpiece at the moment, so that the dental handpiece is only a disposable dental handpiece and cannot be reused. Therefore, in view of the above-mentioned disadvantages of the existing dental handpiece, it is a technical problem to be solved to design a dental handpiece capable of preventing the repeated use of the waste liquid sucked back into the handpiece.

Disclosure of Invention

The invention aims to provide a dental handpiece which can prevent waste liquid from being sucked back into the interior of a handpiece and can be used repeatedly, and the dental handpiece is used for solving the defect that when the air supply of the existing dental handpiece is stopped, an impeller of the existing dental handpiece continues to rotate at a high speed due to inertia to cause negative pressure in the interior of the handpiece, so that the waste liquid in the oral cavity of a patient is sucked back into the handpiece along a machine needle.

The invention is realized by the following technical scheme:

a dental handpiece with anti-suck-back function comprises a handle, a handpiece and a needle, wherein a jacket layer is arranged at the upper end of the outer circular surface of the handpiece, one end of the handle is connected with the handpiece and the jacket layer, a microprocessor is arranged on the outer surface of the handle, a high-pressure air receiving pipe is arranged at the outer end of the handle, a brake air pipe is connected onto the high-pressure air receiving pipe, a first micro electromagnetic valve is arranged on the high-pressure air receiving pipe positioned on the inner side of the brake air pipe, a second micro electromagnetic valve is arranged on the brake air pipe, the first micro electromagnetic valve and the second micro electromagnetic valve are electrically connected with the microprocessor, an air outlet pipe is arranged at the side of the high-pressure air receiving pipe, a high-pressure air channel, a brake air channel and an air outlet channel which correspond to the high-pressure air receiving pipe, the brake air pipe and the air outlet pipe are respectively arranged in the handle, a turbine driving component is arranged in the handpiece, an end cover is arranged at the top end of the machine head above the turbine driving assembly;

the turbine driving assembly sequentially comprises an upper O-shaped rubber ring, an upper bearing sleeve, an upper bearing, a turbine part, a connecting shaft, a lower bearing sleeve and a lower O-shaped rubber ring from top to bottom, the turbine part comprises an upper brake turbine blade, a circular partition plate and a lower drive turbine blade, the directions of blades on the upper brake turbine blade and the lower drive turbine blade are opposite, the connecting shaft is connected with the turbine part, the central axes of the brake turbine blade, the circular partition plate and the lower drive turbine blade coincide during connection, and the lower end part of the connecting shaft extending out of the machine head is detachably connected with the lathe needle;

be close to the aircraft nose lower extreme of handle one side has seted up high-pressure gas pocket, high-pressure gas pocket sets up with drive turbine blade is corresponding down, the inside of double-layered jacket layer has seted up the pitch arc passageway around the outer disc setting of aircraft nose, the one end and the braking gas passageway of pitch arc passageway are linked together, keep away from the aircraft nose upper end of handle one side has seted up the braking gas pocket, the other end and the braking gas pocket of pitch arc passageway are linked together, braking gas pocket and the corresponding setting of last braking turbine blade are located the inside venthole of having seted up of aircraft nose between high-pressure gas pocket and the braking gas pocket, the venthole is linked together with last braking turbine blade, the cavity between the lower drive turbine blade simultaneously, the outer end and the air outlet channel of venthole are linked together.

Be located the outer tip of handle of high pressure air receiving pipe below is provided with atomizing trachea and inlet tube, the inside of handle is provided with atomizing gas channel and the inhalant canal corresponding with atomizing trachea and inlet tube, is located the lower extreme of handle and aircraft nose junction is provided with atomizer, atomizer's upper end is connected with atomizing gas channel, atomizer's side is connected with inhalant canal.

The number of the blades on the upper brake turbine blade and the lower drive turbine blade is the same, and the number of the blades is 5-8.

As a further arrangement of the above scheme, a compression rubber gasket is arranged between the end cover and the upper bearing sleeve.

As a further arrangement of the scheme, the handle comprises a horizontal section handle body vertically connected with the machine head, the outer end of the horizontal section handle body is connected with an inclined section handle body, and an included angle between the inclined section handle body and the horizontal section handle body is 12-18 degrees.

As a further arrangement of the scheme, the inclined section handle body is a circular truncated cone-shaped cylinder with a wide upper part and a narrow lower part.

Has the advantages that:

compared with the prior art, the dental handpiece disclosed by the invention has the advantages that the brake air pipe is connected to the high-pressure air pipe, the micro electromagnetic valves are respectively arranged on the brake air pipe and the high-pressure air pipe, the two micro electromagnetic valves are electrically connected with the microprocessor, the microprocessor simultaneously controls the micro electromagnetic valves on the high-pressure air pipe to be closed and the micro electromagnetic valves on the brake air pipe to be opened at the moment before the high-pressure air stops supplying, so that the high-pressure air is introduced into the brake air pipe and then enters the upper cavity of the handpiece through the brake air passage and the arc passage, at the moment, the turbine part which continuously rotates at high speed due to inertia is acted by reverse high-pressure air in short time, and the high-pressure air acts on the brake turbine blade at the upper end of the turbine part, so that the kinetic energy of the air introduced in short time just offsets the self kinetic energy of the turbine part, and the brake of the turbine part can be quickly realized, and because gas gets into the aircraft nose inner chamber in the braking process, the inside rotatory turbine spare of its aircraft nose can not form the negative pressure in the process of braking, and it has effectively avoided current dental handpiece to stop the resorption of waste liquid in the patient's oral cavity that the air feed leads to because of the negative pressure at the end of the use, and the dental handpiece of its design is reusability better, and its simple structure, practicality are stronger.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a first angular perspective structure of the present invention;

FIG. 2 is a schematic view of a second angular perspective structure according to the present invention;

FIG. 3 is a plan view of the interior of the handpiece and handle of the present invention;

FIG. 4 is a cross-sectional view taken at A-A of FIG. 3;

fig. 5 is an exploded perspective view of the turbine drive assembly of the present invention.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", and,

The terms "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like, refer to an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to the accompanying drawings 1 to 5, in conjunction with the embodiments.

Example 1

Embodiment 1 introduces a dental handpiece with anti-suck-back, refer to fig. 1 and fig. 2, the main structure of the dental handpiece includes a handle 1, a handpiece 2 and a needle 3, a jacket layer 4 is arranged on the upper end of the outer circular surface of the handpiece 2, one end of the handle 1 is connected with the handpiece 2 and the jacket layer 4, the handle 1 is divided into a horizontal section handle body 101 and an inclined section handle body 102, the horizontal section handle body 101 is vertically connected with the handpiece 2 and the jacket layer 4, the inclined section handle body 102 is connected with the outer end part of the horizontal section handle body 101, the included angle between the horizontal section handle body 101 and the inclined section handle body can be set within the range of 12-18 degrees, and the inclined section handle body 102 is a circular truncated cone-shaped cylinder with a wide upper part and a narrow lower part. The outer surface of the handle 101 is provided with a microprocessor 5, the outer end part of the inclined section handle body 102 is provided with a high-pressure air receiving pipe 6, the high-pressure air receiving pipe 6 is connected with a brake air pipe 7, the high-pressure air receiving pipe 6 on the inner side of the brake air pipe 7 is provided with a first micro electromagnetic valve 8, the brake air pipe 7 is provided with a second micro electromagnetic valve 9, the first micro electromagnetic valve 8 and the second micro electromagnetic valve 9 are electrically connected with the microprocessor 5, the microprocessor 5 can simultaneously control the first micro electromagnetic valve 8 to be closed and the second micro electromagnetic valve 9 to be opened in a period of time before the high-pressure air stops supplying, the trend of the high-pressure air is changed, and particularly, the first micro electromagnetic valve 8 is controlled to be closed and the second micro electromagnetic valve 9 is controlled to be opened in a period of time before the high-pressure air stops supplying, and the brake effect can be adjusted according to actual situations. An air outlet pipe 10 is arranged beside the high-pressure air receiving pipe 6.

Referring to fig. 3 and 5, a high pressure air passage 11, a brake air passage 12 and an air outlet passage 13 are provided inside the handle 1 to correspond to the high pressure air receiving pipe 6, the brake air pipe 7 and the air outlet pipe 10, respectively. The inner of the machine head 2 is provided with a cavity, the inner cavity of the machine head 2 is provided with a turbine driving assembly 14, specifically, the turbine driving assembly 14 can refer to fig. 3 and fig. 5, the turbine driving assembly 14 sequentially comprises an upper O-shaped rubber ring 141, an upper bearing sleeve 142, an upper bearing 143, a turbine member 144, a connecting shaft 145, a lower bearing 146, a lower bearing sleeve 147 and a lower O-shaped rubber ring 148 from top to bottom, the design of the turbine member 144 is different from the prior art, the turbine member 144 comprises an upper braking turbine blade 1441, a circular partition plate 1443 and a lower driving turbine blade 1442, the number of blades on the upper braking turbine blade 1441 and the lower driving turbine blade 1442 is the same as that on the lower driving turbine blade 1442, and is 5-8, six blades are provided in the embodiment, and the blade directions on the upper braking turbine blade 1441 and the lower driving turbine blade 1442 are opposite. The connecting shaft 145 is connected with the turbine member 144, and when the connecting shaft 145 is connected, the central axes of the brake turbine blade 1441, the circular partition plate 1443 and the lower drive turbine blade 1442 coincide with each other, and the connecting shaft 145 is detachably connected with the needle 3 by extending out of the lower end part of the machine head 2. And an end cap 15 is provided at the top end of the head 2 above the turbine drive assembly 14, while a compression rubber gasket 16 is also provided between the end cap 15 and the upper bearing sleeve 142.

Referring to fig. 3 and 4, a high pressure air hole 201 is formed at the lower end of the handpiece 2 near the handle 1, the high pressure air hole 201 is disposed corresponding to the lower driving turbine blade 1442, and the high pressure air entering from the high pressure air hole 201 can drive the turbine member 144 to rotate. An arc channel 401 arranged around the outer circular surface of the machine head 2 is arranged in the jacket layer 4, one end of the arc channel 401 is communicated with the brake air channel 12, the upper end of the machine head 2 far away from one side of the handle 1 is provided with a brake air hole 202, the other end of the arc channel 402 is communicated with the brake air hole 202, the brake air hole 202 is arranged corresponding to the upper brake turbine blade 1441, and when the brake air hole 202 enters the brake air hole 202 in a short time, the brake air hole can act on the brake turbine blade 1441, so that a reaction force is provided for the turbine part 144 rotating due to inertia, and the braking effect of the turbine part 144 is achieved. In addition, an air outlet 203 is formed in the head 1 between the high-pressure air hole 201 and the brake air hole 202, and the air outlet 203 is simultaneously communicated with a cavity between the upper brake turbine blade 1441 and the lower drive turbine blade 1442, so that the air exhaust effect is achieved, and the outer end of the air outlet 203 is communicated with the air outlet channel 13.

Example 2

Embodiment 2 is an improvement on embodiment 1, and is mainly added with a spraying system, and specifically referring to fig. 2 and fig. 4, the same points of embodiment 2 as embodiment 1 are not explained again, but the difference is that an atomizing air pipe 17 and a water inlet pipe 18 are further provided at the outer end of the handle 1 below the high pressure air receiving pipe 6, and an atomizing air passage 19 and a water inlet passage 20 corresponding to the atomizing air pipe 17 and the water inlet pipe 18 are provided inside the handle 1. The lower extreme that is located handle 1 and aircraft nose 2 junction is provided with atomizer 21, and its atomizer 21's upper end is connected with atomizing gas passageway 21, and atomizer 21's side is connected with inhalant canal 20, and its water that gets into among atomizer 21 can be atomized into the water smoke and spray out through atomizing gas's effect.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A dental handpiece with anti-suck-back function comprises a handle, a handpiece and a needle, and is characterized in that a jacket layer is arranged at the upper end of the outer circular surface of the handpiece, one end of the handle is connected with the handpiece and the jacket layer, a microprocessor is arranged on the outer surface of the handle, a high-pressure air receiving pipe is arranged at the outer end of the handle, a brake air pipe is connected onto the high-pressure air receiving pipe, a first micro electromagnetic valve is arranged on the high-pressure air receiving pipe positioned on the inner side of the brake air pipe, a second micro electromagnetic valve is arranged on the brake air pipe, the first micro electromagnetic valve and the second micro electromagnetic valve are electrically connected with the microprocessor, an air outlet pipe is arranged at the side of the high-pressure air receiving pipe, and a high-pressure air channel, a brake air channel and an air outlet channel which correspond to the high-pressure air receiving pipe, the brake air pipe and the air outlet pipe are respectively arranged inside the handle, a turbine driving assembly is arranged in the machine head, and an end cover is arranged at the top end of the machine head above the turbine driving assembly;

2. The dental handpiece with the back suction prevention function according to claim 1, wherein an atomizing air pipe and a water inlet pipe are arranged at the outer end of the handle below the high-pressure air connecting pipe, an atomizing air passage and a water inlet passage corresponding to the atomizing air pipe and the water inlet pipe are arranged inside the handle, an atomizing nozzle is arranged at the lower end of the joint of the handle and the handpiece, the upper end of the atomizing nozzle is connected with the atomizing air passage, and the side surface of the atomizing nozzle is connected with the water inlet passage.

3. The dental handpiece with the suck-back prevention function as claimed in claim 1, wherein the number of the blades on the upper brake turbine blade and the lower drive turbine blade is the same and is 5-8.

4. The dental handpiece with anti-suck back of claim 1, wherein a compression rubber gasket is provided between the end cap and the upper bearing sleeve.

5. The dental handpiece with the suck-back prevention function as claimed in claim 1, wherein the handle comprises a horizontal section handle body vertically connected with the handpiece, an inclined section handle body is connected to the outer end of the horizontal section handle body, and the included angle between the inclined section handle body and the horizontal section handle body is 12-18 degrees.

6. The dental handpiece with a suck-back prevention function according to claim 5, wherein the inclined section handle body is a truncated cone-shaped cylinder with a wide upper part and a narrow lower part.