WO2022147903A1

WO2022147903A1 - Dental contra-angle handpiece head assembly and dental contra-angle handpiece

Info

Publication number: WO2022147903A1
Application number: PCT/CN2021/081589
Authority: WO
Inventors: 吴坤优; 覃荣情; 郑金超; 刁跃虎; 张本琴; 林剑华; 孙胜; 韦锋文
Original assignee: 桂林市啄木鸟医疗器械有限公司
Priority date: 2021-01-07
Filing date: 2021-03-18
Publication date: 2022-07-14
Also published as: CN112618057A

Abstract

A dental contra-angle handpiece head assembly, comprising a handpiece main body (100), a reversing valve (200) and an inner water pipe (300). The handpiece main body (100) is provided with a first flow channel (110) and a second flow channel (120) which are independent from each other, the first flow channel (110) being used for communicating with a liquid outlet (2001) of a motor (002), and the second flow channel (120) is used for communicating with an external conduit (900). The reversing valve (200) is provided with a confluence channel (210), and a first connector (220) and a second connector (230) which communicate with the confluence channel (210). The reversing valve (200) is movably connected to the handpiece main body (100) so as to be switched between a first working position and a second working position; when the reversing valve is at the first working position, the first connector (220) communicates with the first flow channel (110) and the second connector (230) is blocked from the second flow channel (120); and when the reversing valve is at the second working position, the first connector (220) is blocked from the first flow channel (110) and the second connector (230) communicates with the second flow channel (120). The inner water pipe (300) communicates with the confluence channel (210) and is used for delivering a fluid to a head of the handpiece main body (100). Further provided is a dental contra-angle handpiece comprising the dental contra-angle handpiece head assembly. The working states of the dental contra-angle handpiece can be adjusted as needed, and the dental contra-angle handpiece has diversified functions.

Description

Dental contra-angle handpiece assembly and dental contra-angle

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application with the application number 202110017563.1 and the title of "Dental contra-angle handpiece and dental contra-angle handpiece" filed with the China Patent Office on January 7, 2021, the entire contents of which are incorporated herein by reference Applying.

technical field

The present application relates to the field of medical equipment, and in particular, to a dental contra-angle handpiece and a dental contra-angle handpiece.

Background technique

The existing dental contra-angle mainly includes two types of internal water channel and external water channel. The dental contra-angle handpiece of the internal water channel is used more frequently, that is, there are water channels and air channels inside the dental contra-angle handpiece, and the water and gas are transmitted to the water channel inside the dental contra-angle handpiece through the motor And gas path, water and gas are ejected at the front end of the machine head to form atomized water. Since the water sprayed by the dental contra-angle needs to be transported by the water channel of the motor, and the water channel of the motor cannot be disinfected and sterilized, when the clinical treatment of diseases such as the oral cavity needs to be connected to normal saline or other sterile solutions for aseptic operation, the existing The dental contra-angle handpiece for internal water channels cannot be realized, and a dedicated dental contra-angle handpiece for external water channels is required, which is not convenient enough to use. In addition, the existing external water channel dental contra-angle handpiece has no built-in water channel, and cooling water cannot be directly provided by the dental chair when a sterile environment is not required, which is inconvenient to use.

The research found that the existing dental contra-angle handpieces have the following shortcomings:

Single function, inconvenient to use.

SUMMARY OF THE INVENTION

The purpose of the present application includes, for example, to provide a dental contra-angle handpiece and a dental contra-angle handpiece, which can be switched between two states of the inner water channel and the outer water channel, and the operation is convenient.

The embodiments of the present application are implemented as follows:

In a first aspect, the present application provides a dental contra-angle handpiece assembly, comprising:

The main body of the mobile phone, the main body of the mobile phone is provided with a first flow channel and a second flow channel independent of each other, the first flow channel is used to communicate with the liquid outlet of the motor, and the second flow channel is used to communicate with the external pipeline;

A reversing valve, the reversing valve is provided with a confluence channel and a first interface and a second interface which are both communicated with the confluence channel; the reversing valve is movably connected with the main body of the mobile phone to switch between the first working position and the second working position. When in the first working position, the first interface is connected with the first flow channel and the second interface is blocked with the second flow channel; when in the second working position, the first interface is blocked with the first flow channel and the second interface is connected with the first flow channel. The two flow channels are connected;

and an inner water pipe, the inner water pipe is communicated with the confluence channel, and is used for conveying the fluid to the head of the mobile phone body.

In one or more optional embodiments, the main body of the mobile phone is provided with an assembly hole, and both the first flow channel and the second flow channel are connected to the assembly hole; the reversing valve is arranged in the assembly hole, and the reversing valve and the main body of the mobile phone are located in the mobile phone. The extension direction of the main body is slidably fitted, so that the reversing valve can be switched between the first working position and the second working position.

In one or more optional embodiments, the main body of the mobile phone has a front end for extending into the oral cavity and a rear end close to the operator, the mounting hole is provided on the end surface where the rear end is located, and the second flow channel is compared with the first flow channel. Set near the back end.

In one or more optional embodiments, the dental contra-angle handpiece further includes a toggle member, the toggle member is connected to the reversing valve, the toggle member protrudes from the outer peripheral surface of the mobile phone body, and the toggle member and the mobile phone body are located in the mobile phone body. The extension direction of the valve is slidably matched to drive the reversing valve to switch between the first working position and the second working position.

In one or more optional embodiments, the mobile phone body is provided with a first limiting portion and a second limiting portion that are arranged at intervals in the extending direction of the mobile phone body, and the toggle member is located at the first limiting portion and the second limiting portion. Between the second limiting portions, the first limiting portion and the second limiting portion are used to selectively abut against the toggle member to limit the sliding range of the toggle member.

In one or more optional implementations, when the reversing valve is in the first working position, the toggle member is in abutment with the first limiting portion; when the reversing valve is in the second working position, the toggle member is in contact with the first position. The second limit part resists.

In one or more optional embodiments, when the reversing valve is switched between the first working position and the second working position, the first interface and the The flow rate can be adjusted by the overlapping area of the flow channel; and the flow rate can be adjusted by adjusting the overlapping area of the second interface and the second flow channel during the communication between the second interface and the second flow channel.

In one or more optional embodiments, the main body of the mobile phone is further provided with an operation hole that communicates with the assembly hole, the operation hole is located on the outer peripheral wall of the main body of the mobile phone, and the operation hole is a bar-shaped hole and extends along the extending direction of the main body of the mobile phone, The first limiting part and the second limiting part are arranged on the hole wall of the operation hole, and the toggle piece is penetrated in the operation hole and protrudes from the outer peripheral wall of the main body of the mobile phone.

In one or more optional embodiments, the main body of the mobile phone is provided with a pressure relief hole communicating with the assembly hole.

In one or more optional embodiments, the inner water pipe is plugged with the confluence channel, and the inner water pipe and the reversing valve are slidably matched in the extending direction of the mobile phone body.

In one or more optional embodiments, the inner peripheral wall of the mobile phone body is further provided with an annular air channel, and the annular air channel is used to communicate with the air outlet of the motor.

In one or more optional embodiments, the dental contra-angle handpiece assembly further includes a sealing member, which is arranged between the reversing valve and the handpiece main body, and is used to seal the gap between the handpiece main body and the reversing valve.

In one or more optional embodiments, the outer peripheral wall of the reversing valve is provided with an annular positioning groove, and the sealing member is arranged in the annular positioning groove.

In alternative one or more embodiments, the seal is a sealing ring, wherein the sealing ring is selected from the following: an O-ring, a V-ring, or a rectangular ring.

In a second aspect, the present application provides a dental contra-angle handpiece, which includes:

The dental contra-angle handpiece assembly of any of the preceding embodiments.

In one or more optional embodiments, the dental contra-angle handpiece further includes a motor and an external pipe, the motor is plugged and matched with the main body of the handpiece, and the liquid outlet of the motor is communicated with the first flow channel; the external pipe is plugged into the main body of the handpiece and communicated with the second flow channel.

In one or more optional embodiments, a jack is provided on the end face of the mobile phone body where the rear end is close to the operator, and the motor is inserted into the jack of the mobile phone body.

The beneficial effects of the embodiments of the present application are:

To sum up, this embodiment provides a dental contra-angle handpiece assembly. During clinical treatment, the state of the handpiece assembly can be adjusted as needed according to on-site conditions, so that it can be adjusted to the corresponding internal water channel water delivery or external water channel. Water delivery, convenient and reliable operation. Specifically, when it is necessary to deliver water from the inner water channel, that is, the water source is transported from the motor to the inner water pipe, and the reversing valve is adjusted to move the reversing valve to the first working position. At this time, the first interface is communicated with the first flow channel. , the liquid outlet of the motor is communicated with the first interface through the first flow channel, the first interface is communicated with the inner water pipe through the confluence channel, and the water transported by the motor flows to the inner water pipe through the first flow channel, the first interface and the confluence channel in turn, and from The inner water pipe flows out and mixes with the gas to form water mist. When it is necessary to carry water from the external waterway, that is, the water source is not sent from the motor to the internal water pipe, but from the external pipeline to the internal water pipe, and the reversing valve is adjusted to move the reversing valve to the second working position. The second flow channel is connected. At this time, the external pipeline, the second flow channel, the second interface, the confluence channel and the inner water pipe are connected in sequence, and the water transported through the external pipeline can smoothly flow to the inner water pipe, and flow out from the inner water pipe. Mix to form mist. In this way, the handpiece assembly provided in this embodiment can switch between the water delivery state of the inner water channel and the water delivery state of the outer water channel, so as to meet the usage requirements of different scenarios, and the use is flexible, convenient, safe and reliable.

At the same time, when the reversing valve is switched between the first working position and the second working position, when the first interface and the first flow passage are connected, the overlapping part of the two gradually increases, and the overlapping area of the two can be adjusted by adjusting To adjust the flow, to achieve the function of adjustable flow. Similarly, when the second interface and the second flow channel are in communication, the flow adjustment can also be achieved by adjusting the overlapping area of the second interface and the second flow channel.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following drawings will briefly introduce the drawings that need to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic structural diagram of a dental contra-angle handpiece assembly according to an embodiment of the application;

FIG. 2 is a schematic diagram of an exploded structure of a dental contra-angle handpiece head assembly according to an embodiment of the application;

3 is a schematic cross-sectional structure diagram of a dental contra-angle handpiece handpiece assembly according to an embodiment of the application;

Fig. 4 is the partial enlarged structure schematic diagram of IV place among Fig. 3;

5 is a partial cross-sectional structural schematic diagram of a mobile phone body according to an embodiment of the application;

6 is a schematic cross-sectional structural diagram of a reversing valve and a toggle member according to an embodiment of the application;

Fig. 7 is a partial structural schematic diagram of the dental contra-angle handpiece assembly according to the embodiment of the application;

FIG. 8 is a schematic diagram of an exploded structure of a dental contra-angle handpiece according to an embodiment of the present application.

icon:

100-mobile phone body; 101-front end; 102-rear end; 103-jack; 110-first flow channel; 120-second flow channel; 130-assembly hole; 131-insertion end; 140-pressure relief hole; 150- Abutting surface; 160-operating hole; 161-first limit part; 162-second limit part; 170-annular air passage; 200-reversing valve; 201-first end; 202-second end; 210 - Confluence channel; 220 - first interface; 230 - second interface; 240 - annular positioning groove; 300 - inner water pipe; 400 - toggle piece; 500 - abutting ring; 600 - fastener; 800-second seal; 900-external piping; 001-shell; 1001-notch; 002-motor; 2001-liquid outlet; 2020-air outlet.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the application is usually placed in use, and is only for the convenience of describing the application and simplifying the description, rather than indicating or implying The device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present application. Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that a component is required to be absolutely horizontal or overhang, but rather may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "arrangement", "installation", "connection" and "connection" should be interpreted in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

At present, there are mainly two types of dental contra-angle handpieces: inner water channel handpiece and external water channel handpiece. The water of the inner water channel handpiece is transported to the inner water pipe through the motor; the water of the outer water channel handpiece is transported to the inner water pipe through the external pipe. Since the motor part of the inner water pipe is not easy to be disinfected and cleaned, the inner water channel elbow is not suitable for conveying sterile solution. At this time, the outer water channel elbow needs to be used for processing, which is cumbersome to operate, high labor intensity and low efficiency. At the same time, when the outer water channel elbow is used to transport the liquid, the outer nozzle of the outer channel elbow is close to the head of the mobile phone, which occupies a large space and is inconvenient to operate. In other words, the existing dental contra-angle handpiece has a single function and is inconvenient to use.

Please refer to FIG. 1-FIG. 7. In view of this, the present embodiment provides a dental contra-angle handpiece assembly, which can meet the needs of both internal and external water channels to transport liquid, with diversified functions, convenient switching, convenient operation, reduced labor intensity, and improved performance. work efficiency.

Please refer to FIG. 1-FIG. 4. In this embodiment, the head assembly of the dental contra-angle handpiece includes:

The mobile phone body 100, the mobile phone body 100 is provided with a first flow channel 110 and a second flow channel 120 which are independent of each other, the first flow channel 110 is used for communicating with the liquid outlet 2001 of the motor 002, and the second flow channel 120 is used for connecting with the external pipeline 900. connected;

The reversing valve 200, the reversing valve 200 is provided with a confluence channel 210 and a first interface 220 and a second interface 230 which are both communicated with the confluence channel 210; Switch between the second working positions; when in the first working position, the first interface 220 communicates with the first flow channel 110 and the second interface 230 is blocked from the second flow channel 120; when in the second working position, the first interface 220 is blocked with the first flow channel 110 and the second interface 230 is communicated with the second flow channel 120;

And the inner water pipe 300 , the inner water pipe 300 communicates with the confluence channel 210 and is used for delivering the fluid to the head of the mobile phone body 100 .

The dental contra-angle handpiece handpiece assembly provided in this embodiment can adjust the state of the handpiece assembly as needed according to the on-site situation during clinical treatment, so that it can be adjusted to the corresponding internal water channel water delivery or external water channel water delivery, and the operation is convenient and reliable. . Specifically, when it is necessary to deliver water from the inner water channel, that is, the water source is transported from the motor 002 to the inner water pipe 300, the reversing valve 200 is adjusted to move the reversing valve 200 to the first working position. At this time, the first interface 220 It communicates with the first flow channel 110, the liquid outlet 2001 of the motor 002 communicates with the first interface 220 through the first flow channel 110, the first interface 220 communicates with the inner water pipe 300 through the confluence channel 210, and the water transported by the motor 002 passes through the first flow channel in turn. 110, the first interface 220 and the confluence channel 210 flow to the inner water pipe 300, and flow out from the inner water pipe 300, and mix with gas to form water mist. When water delivery from the external waterway is required, that is, the water source is not delivered from the motor 002 to the inner water pipe 300, but is delivered from the external pipe 900 to the inner water pipe 300, and the reversing valve 200 is adjusted to move the reversing valve 200 to the second operation position, the second interface 230 is communicated with the second flow channel 120. At this time, the external pipeline 900, the second flow channel 120, the second interface 230, the confluence channel 210 and the inner water pipe 300 are connected in sequence, and the water transported through the external pipeline 900 can It smoothly flows to the inner water pipe 300, and flows out from the inner water pipe 300, and mixes with the gas to form a water mist. In this way, the handpiece assembly provided in this embodiment can switch between the water delivery state of the inner water channel and the water delivery state of the outer water channel, so as to meet the usage requirements of different scenarios, with diverse functions, flexible and convenient use, and improved operation efficiency.

At the same time, when the reversing valve 200 is switched between the first working position and the second working position, in the process of communicating between the first interface 220 and the first flow channel 110, the flow rate can be adjusted by adjusting the overlapping area of the two, so as to realize the flow rate. Adjustable function. Similarly, in the process of communicating between the second interface 230 and the second flow channel 120 , the flow adjustment can also be achieved by adjusting the overlapping area of the second interface 230 and the second flow channel 120 .

Referring to FIG. 5 , in this embodiment, optionally, the main body 100 of the mobile phone has a front end 101 close to the patient in a working state and a rear end 102 for the operator to hold, wherein the front end 101 may also be referred to as the head end, the rear end 102 may also be referred to as the tail end. The end face of the rear end 102 of the mobile phone body 100 is provided with a jack 103 for inserting the motor 002. The inner peripheral wall of the mobile phone body 100 is provided with an annular first flow channel 110. The first flow channel 110 is arranged around the axis of the jack 103. The mobile phone body The outer peripheral wall of 100 is provided with a second flow channel 120 , and the first flow channel 110 is located on the side of the second flow channel 120 close to the front end 101 of the mobile phone body 100 . That is, the second flow channel 120 is disposed close to the rear end 102 of the mobile phone body 100. In other words, the distance between the second flow channel 120 and the rear end 102 is smaller than the distance between the second flow channel 120 and the front end 101. The external pipeline 900 connected to the channel 120 will not increase the volume of the head end. When the head end extends into the patient's oral cavity, the external pipeline 900 will not enter the oral cavity, and the head end has a small volume and is easy to operate.

Optionally, the mobile phone body 100 is further provided with an assembly hole 130 and a pressure relief hole 140 communicating with the assembly hole 130 . Both the assembly hole 130 and the pressure relief hole 140 extend along the length direction of the mobile phone main body 100 , and the assembly hole 130 is close to the mobile phone main body 100 . One end of the front end 101 is the insertion end 131, and the pressure relief hole 140 communicates with the end of the assembly hole 130 close to the rear end 102 of the mobile phone body 100, that is, the pressure relief hole 140 is located on the side of the assembly hole 130 close to the rear end 102 of the mobile phone body 100, Meanwhile, one end of the pressure relief hole 140 away from the mounting hole 130 extends to the end surface of the rear end 102 of the mobile phone body 100 .

Optionally, the assembly hole 130 and the pressure relief hole 140 are both cylindrical holes, the assembly hole 130 and the pressure relief hole 140 are coaxial, and the diameter of the assembly hole 130 is larger than the diameter of the pressure relief hole 140, so that the assembly hole 130 and the pressure relief hole 140 can be connected between the assembly holes 130 and the pressure relief hole 140. An annular abutting surface 150 is formed at the communicating position of the hole 140 .

It should be noted that the first flow channel 110 communicates with the assembly hole 130 through the connecting hole, and the second flow channel 120 communicates with the assembly hole 130 .

Optionally, the mobile phone body 100 is further provided with an operation hole 160 that communicates with the assembly hole 130 , the operation hole 160 is located on the outer peripheral wall of the mobile phone body 100 , and the hole wall of the operation hole 160 is arranged in a row in the axial direction of the mobile phone body 100 . The first limiting portion 161 and the second limiting portion 162 of the cloth are used to limit the sliding range of the reversing valve 200 in the extending direction of the mobile phone body 100 .

Optionally, the operation hole 160 can be a bar-shaped hole, and the operation hole 160 extends along the axial direction of the mobile phone body 100 . In this way, the operation hole 160 has a small volume, occupies a small space, is convenient for processing, and is not easy to weaken the strength of the mobile phone body 100 . .

Referring to FIG. 6 , in this embodiment, optionally, the reversing valve 200 has a cylindrical structure, and the first end 201 of the reversing valve 200 is provided with a confluence passage 210 in the axial direction, and the confluence passage 210 is connected to the reversing passage 210 . The second end 202 of the valve 200 in its axial direction has a spacing. The first port 220 and the second port 230 are both disposed on the peripheral wall of the reversing valve 200 and have a spacing in the circumferential direction of the reversing valve 200 . They are evenly spaced upward, that is, the angle of the first port 220 and the second port 230 in the circumferential direction of the reversing valve 200 is 180°. The first interface 220 is located on the side of the second interface 230 close to the first end 201 , that is, the second connector is closer to the second end 202 than the first interface 220 .

It should be noted that the reversing valve 200 may not be a cylindrical structure, for example, may also be a structure with an oval, square, etc. cross-section, which can be set as required. By setting the reversing valve 200 as a cylindrical structure, it is convenient to seal the gap between the reversing valve 200 and the hole wall of the assembling hole 130 .

When the reversing valve 200 is assembled with the mobile phone body 100, the second end 202 of the reversing valve 200 is inserted from the insertion end 131 of the assembly hole 130, the first end 201 of the reversing valve 200 corresponds to the insertion end 131, and the inner water pipe 300 is inserted from the The end 131 is inserted into the first end 201 of the reversing valve 200 . In this way, the reversing valve 200 is slidably matched with the mounting hole 130 in the axial direction of the mounting hole 130 , and when the reversing valve 200 slides to the first position, the first interface 220 communicates with the first flow channel 110 through the connecting hole , the outer peripheral wall of the reversing valve 200 blocks the second flow channel 120 , and at this time, water delivery in the inner water channel can be performed. When the reversing valve 200 slides to the second position, the outer peripheral wall of the reversing valve 200 blocks the connecting hole, and the second port 230 communicates with the second flow channel 120 . At this time, water delivery from the external water channel can be performed. At the same time, the second interface 230 is close to the rear end 102 of the mobile phone body 100. When the second interface 230 is connected to the external pipe 900 through the second flow channel 120, the external pipe 900 is located at the rear end 102 of the mobile phone body 100, and the external pipe 900 is not located in the mobile phone. The front end 101 of the main body 100 and the front end 101 of the main body 100 of the mobile phone are small in size, and require little space during operation, and are convenient and flexible to operate in the oral cavity with limited space.

Please refer to FIG. 6 and FIG. 7 , in this embodiment, optionally, the dental contra-angle handpiece assembly further includes a toggle member 400 , one end of the toggle member 400 is communicated with the reversing valve 200 , and the toggle member 400 passes through the The operation hole 160 is inside and protrudes from the outer peripheral wall of the mobile phone body 100 . The toggle member 400 is located between the first limiting portion 161 and the second limiting portion 162 , and the outer wall of the toggle member 400 is in contact with the hole wall of the operation hole 160 in the circumferential direction of the mobile phone body 100 , thereby preventing the reversing valve 200 Rotating in the mounting hole 130 makes the relative positions of the first interface 220 , the second interface 230 , the first flow channel 110 and the second flow channel 120 accurate and reliable. When the position of the reversing valve 200 needs to be switched, the toggle member 400 can be operated to slide between the first limiting portion 161 and the second limiting portion 162 . Specifically, when the toggle member 400 moves to abut against the first limiting portion 161, the reversing valve 200 is in the first position. The second flow channel 120 is blocked; when the toggle member 400 moves to abut against the second limiting portion 162, the reversing valve 200 is in the second position, and at this time, the second interface 230 communicates with the second flow channel 120, and the first An interface 220 is blocked from the first flow channel 110 . This arrangement facilitates adjusting the position of the reversing valve 200 through the toggle member 400 , and facilitates determining the working state of the reversing valve 200 according to the position of the toggle member 400 , and the operation is convenient and reliable.

In addition, since the connection between the assembly hole 130 and the pressure relief hole 140 has the abutting surface 150 , when the reversing valve 200 slides from the first working position to the second working position, the abutting surface 150 has the function of restricting the sliding of the reversing valve 200 , to prevent the reversing valve 200 from slipping out of the pressure relief hole 140 . In addition, when the reversing valve 200 slides, the gas can be discharged from the pressure relief hole 140 , and the reversing valve 200 can slide flexibly and is not easily stuck in the assembly hole 130 . Obviously, when the reversing valve 200 is in the second working position, the second end 202 of the reversing valve 200 does not necessarily abut against the abutting surface 150 , but only relies on the abutting of the second limiting portion 162 with the toggle member 400 for limiting bit is also possible.

It should be understood that, in other embodiments, a driving mechanism may be provided to drive the toggle member 400 to move, so as to adjust the position of the reversing valve 200, so that the reversing valve 200 can interact with each other between the first working position and the second working position switch. For example, the driving mechanism may be a motor screw transmission mechanism, a cylinder mechanism, a hydraulic cylinder mechanism, or an electric push rod.

In addition, the reversing valve 200 may not switch the working position by sliding relative to the mobile phone body 100 in a straight line. For example, in other embodiments, the reversing valve 200 may rotate relative to the mobile phone body 100 to realize the switching of the working position. Switching, or the reversing valve 200 is rotated relative to the mobile phone body 100 while sliding to realize the switching of the working position.

Referring to FIG. 7 , in this embodiment, optionally, the inner water pipe 300 is inserted into the confluence channel 210 from the first end 201 of the reversing valve 200 after passing through the insertion end 131 , and the inner water pipe 300 and the confluence channel 210 are slidable Matching, that is, when the reversing valve 200 slides relative to the assembly hole 130, it slides relative to the inner water pipe 300 at the same time, and at the same time, the reversing valve 200 will not be separated from the inner water pipe 300 during the sliding process, and the connection stability of the two is high.

Optionally, the assembly hole 130 is provided with a resisting ring 500 , and an inner thread is provided on the hole wall of the mounting hole 130 on the side of the resisting ring 500 close to the insertion end 131 . The inner water pipe 300 is provided with a fastener 600 and a first sealing member 700. The inner water pipe 300 penetrates the abutting ring 500 and is inserted into the confluence channel 210. The fastener 600 is screwed into the assembly hole 130, and the first sealing The component 700 is clamped in the fastener 600 and the abutting ring 500, and the sealing performance is good, and it is not easy to leak liquid.

In this embodiment, optionally, the dental contra-angle handpiece assembly further includes a plurality of second sealing members 800, and the plurality of second sealing members 800 are arranged in the assembly hole 130, located on the hole wall of the assembly hole 130 and the reversing valve 200 , for sealing the hole wall of the mounting hole 130 and the outer peripheral wall of the reversing valve 200 .

It should be noted that the second seal 800 can be embedded in the assembly hole 130 , and after the reversing valve 200 is inserted into the assembly hole 130 from the insertion end 131 of the assembly hole 130 , the second seal 800 realizes the hole of the assembly hole 130 Wall and diverter valve 200 seal. Alternatively, the second sealing member 800 is sleeved outside the reversing valve 200, and is a combined structure with the reversing valve 200. When the reversing valve 200 is inserted into the assembly hole 130, the second sealing member 800 realizes the reversing valve 200 and the reversing valve 200. Sealing of the hole wall of the assembly hole 130 . In this embodiment, the second sealing member 800 is sleeved outside the reversing valve 200 as an example for description.

The number of the second seals 800 is five, and the five second seals 800 are all sleeved outside the reversing valve 200. Optionally, the outer peripheral wall of the reversing valve 200 is provided with five annular positioning grooves 240, five The second seals 800 are respectively disposed in the five annular positioning grooves 240 , the position of the second seals 800 is accurate and reliable, not easy to be displaced, and has a good sealing effect.

For the convenience of description, it is assumed that, in the direction from the first end 201 to the second end 202 of the reversing valve 200, the five second sealing members 800 are respectively sealing member a, sealing member b, sealing member c, and sealing member d. and seal e, when the five second seals 800 are assembled with the reversing valve 200, the first port 220 on the reversing valve 200 is located between the seal c and the seal d, the second Interface 230 is located between seal d and seal e. When the reversing valve 200 is in the first working position, the first flow channel 110 communicates with the first interface 220, and both the first flow channel 110 and the first interface 220 are located between the sealing element d and the sealing element e; when the reversing valve 200 is in the first working position In the second working position, the second flow channel 120 communicates with the second interface 230, the second flow channel 120 and the second interface 230 are both located between the seal d and the seal e, and the first flow channel 110 is located between the seal b and the seal between pieces c.

It should be noted that both the first sealing member 700 and the second sealing member 800 may be sealing rings, and the sealing rings may be O-rings, V-rings, rectangular rings, or the like. The shapes of the first sealing member 700 and the second sealing member 800 may be set to be different.

In other embodiments, the dental contra-angle handpiece assembly further includes an external conduit 900 , and the external conduit 900 is inserted into the second interface 230 .

It should be noted that the inner peripheral wall of the mobile phone body 100 is also provided with an annular air passage 170 for communicating with the air outlet 2020 of the motor 002 , and the annular air passage 170 is communicated with an air delivery pipe, which is used to deliver gas to the mobile phone body 100 The front end 101 of the mobile phone body 100 cooperates with the gas and water to form a water mist.

In other embodiments, the mobile phone body 100 is covered with a casing 001 , and the toggle member 400 extends out of the casing 001 . Correspondingly, the casing 001 is provided with a through hole corresponding to the operation hole 160 . Meanwhile, the casing 001 is provided with a notch 1001 capable of exposing the second interface 230 outside the casing 001 .

In the dental contra-angle handpiece handpiece assembly provided in this embodiment, the position of the reversing valve 200 can be adjusted as needed when in use. When the reversing valve 200 is in the first working position, the first interface 220 is communicated with the first flow channel 110, which can Realize internal water delivery. When the reversing valve 200 is in the second operation, the second interface 230 is in communication with the second flow channel 120, so that water delivery from the external water channel can be realized. The function of the head assembly is diversified, the operation is flexible, and the operation efficiency is high. At the same time, when the reversing valve 200 is in the first working position, the reversing valve 200 can be properly adjusted, so that the overlapping area of the first interface 220 and the first flow channel 110 is changed, thereby adjusting the flow rate. Similarly, when the reversing valve 200 is in the second working position, the overlapping area of the second interface 230 and the second flow channel 120 can also be adjusted, thereby adjusting the flow rate.

Referring to FIG. 8 , this embodiment also provides a dental contra-angle handpiece, including a motor 002 and the dental contra-angle handpiece head assembly mentioned in the above-mentioned embodiments, the motor 002 is inserted into the jack 103 of the mobile phone body 100 , and the motor 002 The liquid outlet 2001 is communicated with the first flow channel 110, and the air outlet 2020 of the motor 002 is communicated with the annular air channel 170. The motor 002 is used to supply water to the first flow channel 110 when the dental contra-angle handpiece is delivering water in the internal water channel, so that the The first flow channel 110 and the first interface 220 flow to the confluence channel 210 , and finally flow out from the inner water pipe 300 .

The dental contra-angle handpiece provided by this embodiment can carry out water delivery in an internal water channel or an external water channel as required, and has diversified functions, flexible and reliable operation, and high safety.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Industrial Applicability

The dental contra-angle handpiece provided by this application can switch between the water delivery state of the internal water channel and the water delivery state of the external water channel, so as to meet the needs of use in different scenarios, and is flexible, convenient, safe and reliable; the dental contra-angle handpiece can be used as needed Carry out water delivery in internal waterways or external waterways, with diversified functions, flexible and reliable operation and high safety.

Claims

A dental contra-angle handpiece assembly, characterized in that it includes:

The mobile phone body, the mobile phone body is provided with a first flow channel and a second flow channel independent of each other, the first flow channel is used for communication with the liquid outlet of the motor, and the second flow channel is used for communication with an external pipeline;

A reversing valve, the reversing valve is provided with a confluence channel and a first interface and a second interface which are both communicated with the confluence channel; the reversing valve is movably connected with the mobile phone main body, so as to be in the first working position and Switch between the second working positions; when in the first working position, the first interface communicates with the first flow channel and the second interface is blocked from the second flow channel; in the first working position In the second working position, the first interface is blocked from the first flow channel and the second interface is communicated with the second flow channel;

and an inner water pipe, the inner water pipe communicates with the confluence channel and is used for delivering fluid to the head of the mobile phone body.
The dental contra-angle handpiece assembly of claim 1, wherein:

The main body of the mobile phone is provided with an assembly hole, and both the first flow channel and the second flow channel communicate with the assembly hole; the reversing valve is arranged in the assembly hole, and the reversing valve is connected to the assembly hole. The mobile phone body is slidably matched in the extending direction of the mobile phone body, so that the reversing valve can be switched between the first working position and the second working position.
The dental contra-angle handpiece assembly of claim 2, wherein:

The main body of the mobile phone has a front end for extending into the mouth and a rear end close to the operator, the assembly hole is arranged on the end surface where the rear end is located, and the second flow channel is closer to the first flow channel than the first flow channel. the backend settings described above.
The dental contra-angle handpiece assembly of claim 2, wherein:

The dental contra-angle handpiece further includes a toggle piece, the toggle piece is connected to the reversing valve, the toggle piece protrudes from the outer peripheral surface of the handpiece main body, and the toggle piece and the handpiece main body are located at the outer periphery of the handpiece. The extension direction of the mobile phone body is slidably matched to drive the reversing valve to switch between the first working position and the second working position.
The dental contra-angle handpiece assembly of claim 4, wherein:

The main body of the mobile phone is provided with a first limiting portion and a second limiting portion which are arranged at intervals in the extending direction of the mobile phone body, and the toggle member is located at the first limiting portion and the second limiting portion. Between the limiting portions, the first limiting portion and the second limiting portion are used to selectively abut against the toggle member to limit the sliding range of the toggle member.
The dental contra-angle handpiece assembly of claim 5, wherein:

When the reversing valve is in the first working position, the toggle member abuts against the first limiting portion; when the reversing valve is in the second working position, the toggle The piece abuts against the second limiting portion.
The dental contra-angle handpiece assembly of claim 6, wherein:

When the reversing valve is switched between the first working position and the second working position, by adjusting the first interface and the The flow rate is adjusted by adjusting the overlapping area of the first flow channel; and the flow rate is adjusted by adjusting the overlapping area of the second interface and the second flow channel during the communication process between the second interface and the second flow channel.
The dental contra-angle handpiece assembly according to any one of claims 5 to 7, wherein:

The mobile phone body is further provided with an operation hole communicated with the assembly hole, the operation hole is located on the outer peripheral wall of the mobile phone body, the operation hole is a strip hole and extends along the extension direction of the mobile phone body, The first limiting portion and the second limiting portion are arranged on the hole wall of the operation hole, and the toggle piece is inserted through the operation hole and protrudes from the outer peripheral wall of the mobile phone body.
The dental contra-angle handpiece assembly according to any one of claims 2 to 8, wherein:

The main body of the mobile phone is provided with a pressure relief hole communicated with the assembly hole.
The dental contra-angle handpiece assembly according to any one of claims 2 to 9, wherein:

The inner water pipe is inserted into the confluence channel, and the inner water pipe and the reversing valve are slidably matched in the extending direction of the mobile phone body.
The dental contra-angle handpiece assembly of any one of claims 1 to 10, wherein:

The inner peripheral wall of the main body of the mobile phone is further provided with an annular air passage, and the annular air passage is used to communicate with the air outlet of the motor.
The dental contra-angle handpiece assembly of any one of claims 1 to 11, wherein:

The dental contra-angle handpiece assembly further includes a sealing member, which is arranged between the reversing valve and the handpiece main body, and is used to seal the gap between the handpiece main body and the reversing valve.
The dental contra-angle handpiece assembly of claim 12, wherein:

The outer peripheral wall of the reversing valve is provided with an annular positioning groove, and the sealing member is arranged in the annular positioning groove.
The dental contra-angle handpiece assembly according to claim 12 or 13, wherein:

The sealing element is a sealing ring, wherein the sealing ring is selected from the following: O-ring, V-ring or rectangular ring.
A dental contra-angle handpiece, characterized in that the dental contra-angle handpiece comprises:

14. The dental contra-angle handpiece assembly of any of claims 1-14.
The dental contra-angle handpiece of claim 15, wherein:

The dental contra-angle handpiece further includes a motor and an external pipeline, the motor is plugged and matched with the main body of the handpiece, and the liquid outlet of the motor is communicated with the first flow channel; the external pipeline is inserted into the main body of the handpiece. connected and communicated with the second flow channel.
The dental contra-angle handpiece of claim 16, wherein:

The end face of the mobile phone main body where the rear end is close to the operator is provided with a jack, and the motor is inserted into the jack of the mobile phone main body.