CN214484649U - Dental handpiece head assembly and dental handpiece - Google Patents

Abstract

A dental curved hand piece head component and a dental curved hand piece, the head component comprises a hand piece main body, the hand piece main body is provided with a first flow passage and a second flow passage which are mutually independent, the first flow passage is used for being communicated with a liquid outlet of a motor, and the second flow passage is used for being communicated with an external pipeline; the reversing valve is provided with a confluence channel, a first interface and a second interface which are communicated with the confluence channel; the reversing valve is movably connected with the mobile phone main body so as to be switched between a first working position and a second working position; when the first working position is located, the first interface is communicated with the first flow passage, and the second interface is blocked from the second flow passage; when the first working position is located, the first interface is blocked from the first flow passage, and the second interface is communicated with the second flow passage; and the inner water pipe is communicated with the confluence channel and is used for conveying the fluid to the head of the mobile phone main body. The dental elbow can adjust the working state as required, has diversified functions and is convenient and reliable to use.

Description

Dental handpiece head assembly and dental handpiece

Technical Field

The utility model relates to a medical equipment field particularly, relates to a dentistry curved hand machine aircraft nose subassembly and dentistry curved hand machine.

Background

The existing dental elbow mainly comprises an inner water channel and an outer water channel, the dental elbow with the inner water channel is used frequently, namely a water channel and an air channel are arranged in the dental elbow, water and air are transmitted to the water channel and the air channel in the dental elbow through a motor, and the water and the air are sprayed out at the front end of a machine head to form atomized water. Because the water sprayed by the dental bender needs to be conveyed by a water path of the motor, and the water path of the motor can not be disinfected and sterilized, when the clinical treatment of diseases such as oral cavity and the like needs to be carried out by aseptic operation with physiological saline or other sterile solutions, the existing inner water channel dental bender can not be realized, and a special outer water channel dental bender is needed, so the use is not convenient enough. In addition, the existing outer water channel dental elbow machine is not provided with a built-in water channel, and cooling water cannot be directly provided by a dental chair when a sterile environment is not needed, so that the use is inconvenient.

The research shows that the existing dental bending machine has the following defects:

single function and inconvenient use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a dental handpiece aircraft nose subassembly and dental handpiece, it can be switched over each other under inner water course and outer water course two kinds of states, the simple operation.

The embodiment of the utility model is realized like this:

in a first aspect, the utility model provides a dental handpiece head assembly, include:

the mobile phone comprises a mobile phone main body, wherein the mobile phone main body is provided with a first flow channel and a second flow channel which are mutually independent, the first flow channel is used for being communicated with a liquid outlet of a motor, and the second flow channel is used for being communicated with an external pipeline;

the reversing valve is provided with a confluence channel, a first interface and a second interface which are communicated with the confluence channel; the reversing valve is movably connected with the mobile phone main body so as to be switched between a first working position and a second working position; when the first working position is located, the first interface is communicated with the first flow passage, and the second interface is blocked from the second flow passage; when the first working position is located, the first interface is blocked from the first flow passage, and the second interface is communicated with the second flow passage;

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

In an optional embodiment, the mobile phone body is provided with an assembly hole, and the first flow channel and the second flow channel are both communicated with the assembly hole; the reversing valve is arranged in the assembling hole, and the reversing valve is matched with the mobile phone main body in a sliding manner in the extending direction of the mobile phone main body, so that the reversing valve can be switched between a first working position and a second working position.

In an alternative embodiment, the handpiece body has a front end for extending into the oral cavity and a rear end adjacent to the operator, the fitting hole is provided on an end surface of the rear end, and the second flow passage is provided adjacent to the rear end compared to the first flow passage.

In an optional embodiment, the dental bending handpiece further comprises a toggle piece, the toggle piece is connected with the reversing valve, the toggle piece protrudes out of the outer peripheral surface of the handpiece main body, and the toggle piece and the handpiece main body are matched in a sliding manner in the extending direction of the handpiece main body so as to drive the reversing valve to be switched between the first working position and the second working position.

In an optional embodiment, the mobile phone body 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, the toggle member is located between the first limiting portion and the second limiting portion, and the first limiting portion and the second limiting portion are used for alternatively abutting against the toggle member so as to limit the sliding range of the toggle member.

In an optional embodiment, when the reversing valve is in the first working position, the stirring piece is abutted against the first limiting part; when the reversing valve is in the second working position, the stirring piece is abutted against the second limiting part.

In an alternative embodiment, the handset body is provided with a pressure relief hole communicating with the fitting hole.

In an alternative embodiment, the inner water pipe is inserted into the confluence channel, and the inner water pipe is slidably matched with the reversing valve in the extending direction of the mobile phone body.

In an alternative embodiment, the dental handpiece head assembly further comprises a sealing member disposed between the reversing valve and the handpiece body for sealing a gap between the handpiece body and the reversing valve.

In a second aspect, the present invention provides a dental handpiece, the dental handpiece including:

the dental bender handpiece assembly of any of the preceding embodiments.

In an optional embodiment, the dental bending handpiece further comprises a motor and an external pipeline, the motor is in plug fit with the handpiece body, and a liquid outlet of the motor is communicated with the first flow channel; the external pipeline is inserted into the mobile phone main body and communicated with the second flow channel.

The embodiment of the utility model provides a beneficial effect is:

in summary, the embodiment provides a dental handpiece head assembly, when clinical treatment is performed, the state of the head assembly is adjusted according to the on-site situation as required, so that the head assembly is adjusted to be corresponding to the inner water channel water delivery or the outer water channel water delivery, and the operation is convenient and reliable. Specifically, when the water is transported through the inner water channel, namely the water source is transported to the inner water pipe from the motor, the reversing valve is adjusted, the reversing valve is moved to a first working position, at the moment, 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, the water transported by the motor sequentially flows to the inner water pipe through the first flow channel, the first interface and the confluence channel, flows out of the inner water pipe and is mixed with the gas to form water mist. When the outer water channel water delivery is needed, namely, the water source is not conveyed to the inner water pipe from the motor, but is conveyed to the inner water pipe from the external pipeline, the reversing valve is adjusted, the reversing valve is moved to the second working position, the second interface is communicated with the second flow channel, at the moment, the external pipeline, the second flow channel, the second interface, the confluence channel and the inner water pipe are sequentially communicated, water conveyed through the external pipeline can smoothly flow to the inner water pipe, flows out from the inner water pipe, and forms water mist with gas mixing. So, the aircraft nose subassembly that this embodiment provided can switch each other between inner water course water delivery state and outer water course water delivery state to satisfy the user demand of different scenes, it is nimble convenient to use, safe and reliable.

Meanwhile, when the reversing valve is switched between the first working position and the second working position, when the first interface is communicated with the first flow channel, the overlapped part of the first interface and the first flow channel is gradually increased, the flow can be adjusted by adjusting the overlapped area of the first interface and the first flow channel, and the function of adjusting the flow is realized. Similarly, when the second interface is communicated with the second flow passage, the flow rate can be adjusted by adjusting the overlapping area of the second interface and the second flow passage.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a dental handpiece head assembly according to an embodiment of the present invention;

fig. 2 is an exploded view of a handpiece assembly of a dental handpiece according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional structural view of a handpiece assembly of a dental handpiece according to an embodiment of the present invention;

FIG. 4 is a partial enlarged view of FIG. 3 at IV;

fig. 5 is a schematic view of a partial cross-sectional structure of a mobile phone body according to an embodiment of the present invention;

fig. 6 is a schematic sectional structural view of the reversing valve and the toggle member according to the embodiment of the present invention;

fig. 7 is a schematic view of a portion of a dental handpiece head assembly according to an embodiment of the present invention;

fig. 8 is an exploded view of a dental handpiece according to an embodiment of the present invention.

Icon:

100-a mobile phone body; 101-front end; 102-a back end; 103-jack; 110-a first flow channel; 120-a second flow channel; 130-assembly holes; 131-an insertion end; 140-pressure relief vent; 150-a holding surface; 160-operation hole; 161-a first stop; 162-a second limit portion; 170-an annular air passage; 200-a reversing valve; 201-a first end; 202-a second end; 210-a sink channel; 220 — a first interface; 230-a second interface; 240-annular positioning groove; 300-an inner water pipe; 400-a toggle piece; 500-a retaining ring; 600-a fastener; 700-a first seal; 800-a second seal; 900-external pipeline; 001-shell; 1001-notch; 002-motor; 2001-liquid outlet; 2020-air outlet.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

At present, the dental elbow mainly comprises two types, namely an inner water channel elbow and an outer water channel elbow, wherein water in the inner water channel elbow is conveyed to an inner water pipe through a motor; the water of the outer water channel elbow phone is conveyed to the inner water pipe through the outer connecting pipe. Because the motor part of the inner water pipe is not easy to disinfect and clean, the inner water channel elbow machine is not suitable for conveying sterile solution, and at the moment, the outer water channel elbow machine is required to be used for processing, so that the operation is complex, the labor intensity is high, and the efficiency is low. Meanwhile, when the external water channel bending mobile phone is used for conveying liquid, an external connecting pipe of the external water channel bending mobile phone is close to a machine head of the mobile phone, so that the occupied space is large, and the operation is inconvenient. In other words, the existing dental elbow has single function and is inconvenient to use.

Referring to fig. 1 to 7, in view of the above, the present embodiment provides a handpiece assembly for a dental handpiece, which can simultaneously deliver liquid through an inner water channel and an outer water channel, and has the advantages of diversified functions, convenient switching, convenient operation, reduced labor intensity, and improved operation efficiency.

Referring to fig. 1-4, in the present embodiment, a dental handpiece assembly includes:

the mobile phone comprises a mobile phone main body 100, wherein the mobile phone main 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 being communicated with a liquid outlet 2001 of a motor 002, and the second flow channel 120 is used for being communicated with an external pipeline 900;

the reversing valve 200 is provided with a confluence channel 210, a first port 220 and a second port 230 which are communicated with the confluence channel 210; the reversing valve 200 is movably connected with the mobile phone main body 100 so as to be switched between a first working position and a second working position; in the first working position, the first port 220 is communicated with the first flow passage 110 and the second port 230 is blocked from the second flow passage 120; in the second working position, the first port 220 is blocked from the first flow channel 110 and the second port 230 is communicated with the second flow channel 120;

and an inner water pipe 300, the inner water pipe 300 communicating with the confluence passage 210 for delivering the fluid to the head of the cell phone body 100.

The dental bending handpiece assembly provided by the embodiment can adjust the state of the handpiece assembly as required according to the field condition when clinical treatment is carried out, so that the handpiece assembly is adjusted to be corresponding to inner water channel water delivery or outer water channel water delivery, and the operation is convenient and reliable. Specifically, when the water delivery of the internal water channel is required, that is, the water source is delivered to the internal water tube 300 from the motor 002, the reversing valve 200 is adjusted to move the reversing valve 200 to the first working position, at this time, the first interface 220 is communicated with the first flow channel 110, the liquid outlet 2001 of the motor 002 is communicated with the first interface 220 through the first flow channel 110, the first interface 220 is communicated with the internal water tube 300 through the confluence channel 210, and the water delivered by the motor 002 sequentially flows to the internal water tube 300 through the first flow channel 110, the first interface 220 and the confluence channel 210, flows out of the internal water tube 300 and is mixed with the gas to form the water mist. When water needs to be delivered from the external water pipe, that is, the water source is not delivered to the internal water pipe 300 from the motor 002, but is delivered to the internal water pipe 300 from the external pipeline 900, the reversing valve 200 is adjusted to move the reversing valve 200 to the second working 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 internal water pipe 300 are sequentially communicated, and water delivered through the external pipeline 900 can smoothly flow to the internal water pipe 300 and flow out from the internal water pipe 300 to be mixed with gas to form water mist. So, the aircraft nose subassembly that this embodiment provided can switch each other between inner water course water delivery state and outer water course water delivery state to satisfy the user demand of different scenes, the function is various, and it is nimble convenient to use, improves the operating efficiency.

Meanwhile, when the direction valve 200 is switched between the first working position and the second working position, in the process of communicating the first port 220 with the first flow passage 110, the flow rate can be adjusted by adjusting the overlapping area of the two, so that the function of adjusting the flow rate is realized. Similarly, during the process of communicating the second port 230 with the second flow channel 120, the flow rate can be adjusted by adjusting the overlapping area of the second port 230 and the second flow channel 120.

Referring to fig. 5, in the present embodiment, optionally, the mobile phone main body 100 has a front end 101 close to the patient in the working state and a rear end 102 for the operator to hold, wherein the front end 101 may also be referred to as a head end and the rear end 102 may also be referred to as a tail end. The end face of the rear end 102 of the mobile phone main body 100 is provided with a jack 103 for plugging the motor 002, the inner peripheral wall of the mobile phone main 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 outer peripheral wall of the mobile phone main body 100 is provided with a second flow channel 120, and the first flow channel 110 is located on one side of the second flow channel 120 close to the front end 101 of the mobile phone main body 100. That is, the second flow channel 120 is disposed near the rear end 102 of the handset main 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, so that the external connection pipe 900 communicated with the second flow channel 120 does not increase the volume of the head end, and when the head end extends into the oral cavity of the patient, the external connection pipe 900 does not enter the oral cavity, and the head end has a small volume, which is convenient for operation.

Further, the mobile phone main body 100 is further provided with an assembly hole 130 and a pressure relief hole 140 communicated with the assembly hole 130, the assembly hole 130 and the pressure relief hole 140 both extend along the length direction of the mobile phone main body 100, the end of the assembly hole 130 close to the front end 101 of the mobile phone main body 100 is an insertion end 131, the pressure relief hole 140 is communicated with the end of the assembly hole 130 close to the rear end 102 of the mobile phone main 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 main body 100, and meanwhile, the end of the pressure relief hole 140 far away from the assembly hole 130 extends to the end face of the rear end 102 of the mobile phone main body 100.

Optionally, the assembly hole 130 and the pressure relief hole 140 are cylindrical holes, the assembly hole 130 is coaxial with the pressure relief hole 140, and the diameter of the assembly hole 130 is larger than that of the pressure relief hole 140, so as to form an annular abutting surface 150 at the communication position of the assembly hole 130 and the pressure relief hole 140.

It should be noted that the first flow passage 110 communicates with the fitting hole 130 through the connection hole, and the second flow passage 120 communicates with the fitting hole 130.

Further, the mobile phone main body 100 is further provided with an operation hole 160 communicated with the assembly hole 130, the operation hole 160 is located on the outer peripheral wall of the mobile phone main body 100, the hole wall of the operation hole 160 is provided with a first limiting portion 161 and a second limiting portion 162 which are arranged at intervals in the axial direction of the mobile phone main body 100, and the first limiting portion 161 and the second limiting portion 162 are used for limiting the sliding range of the reversing valve 200 in the extending direction of the mobile phone main body 100.

Optionally, the operation hole 160 may be a strip-shaped hole, and the operation hole 160 extends along the axial direction of the mobile phone main body 100, so that the operation hole 160 has a small volume, occupies a small space, is convenient to process, and is not easy to weaken the strength of the mobile phone main body 100.

Referring to fig. 6, in the present embodiment, optionally, the direction valve 200 is a cylinder structure, the direction valve 200 is provided with a confluence channel 210 at a first end 201 in the axial direction, and the confluence channel 210 is spaced from a second end 202 of the direction valve 200 in the axial direction. The first ports 220 and the second ports 230 are disposed on the circumferential wall of the direction valve 200 with a distance in the circumferential direction of the direction valve 200, for example, the first ports 220 and the second ports 230 are uniformly spaced in the circumferential direction of the direction valve 200, that is, the first ports 220 and the second ports 230 have an angle of 180 ° in the circumferential direction of the direction valve 200. The first port 220 is located on a side of the second port 230 near the first end 201, i.e., the second connector is closer to the second end 202 than the first port 220.

It should be noted that the direction valve 200 may not be a cylindrical structure, but may be a structure having an oval, square, or the like cross section, for example, and may be arranged as needed. By providing the direction valve 200 as a cylindrical structure, it is convenient to seal the gap between the direction valve 200 and the wall of the fitting hole 130.

When the reversing valve 200 is assembled with the handpiece 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 internal water pipe 300 is inserted into the first end 201 of the reversing valve 200 from the insertion end 131. By such design, the direction valve 200 is slidably engaged with the assembly hole 130 in the axial direction of the assembly hole 130, and when the direction valve 200 is slid to the first position, the first port 220 is communicated with the first flow passage 110 through the connection hole, and the outer peripheral wall of the direction valve 200 blocks the second flow passage 120, at this time, the inner water passage water delivery can be performed. When the direction valve 200 slides to the second position, the outer circumferential wall of the direction valve 200 blocks the connection hole, and the second port 230 communicates with the second flow passage 120, at this time, water delivery from the outer water passage is possible. Meanwhile, the second interface 230 is close to the rear end 102 of the handset main body 100, when the second interface 230 is connected to the external pipeline 900 through the second flow channel 120, the external pipeline 900 is located at the rear end 102 of the handset main body 100, the external pipeline 900 is not located at the front end 101 of the handset main body 100, the front end 101 of the handset main body 100 is small in size, the required space is small during operation, and the operation in the oral cavity with limited space is convenient and flexible.

Referring to fig. 6 and 7, in the present embodiment, optionally, the dental 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 is disposed in the operation hole 160 and protrudes out of the outer peripheral wall of the handpiece main 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 contacts with the hole wall of the operation hole 160 in the circumferential direction of the handset main body 100, so as to prevent the direction valve 200 from rotating in the assembly hole 130, and to ensure that the relative positions of the first interface 220, the second interface 230, the first flow passage 110 and the second flow passage 120 are accurate and reliable. When the position of the direction switching valve 200 needs to be switched, the toggle member 400 is operated to slide between the first stopper 161 and the second stopper 162. Specifically, when the toggle member 400 moves to abut against the first limiting portion 161, the reversing valve 200 is located at the first position, at this time, the first port 220 is communicated with the first flow passage 110, and the second port 230 is blocked from the second flow passage 120; when the toggle member 400 moves to abut against the second position-limiting portion 162, the direction valve 200 is at the second position, and at this time, the second port 230 is communicated with the second flow passage 120, and the first port 220 is blocked from the first flow passage 110. Due to the arrangement, the position of the reversing valve 200 can be conveniently adjusted through the poking piece 400, the working state of the reversing valve 200 can be conveniently judged according to the position of the poking piece 400, and the operation is convenient and reliable.

In addition, because the joint of the assembly hole 130 and the pressure relief hole 140 is provided with 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 limiting the sliding of the reversing valve 200, and the reversing valve 200 is prevented from sliding out of the pressure relief hole 140. And when the reversing valve 200 slides, gas can be discharged from the pressure relief hole 140, and the reversing valve 200 slides flexibly and is not easy to be blocked in the assembly hole 130. Obviously, when the direction valve 200 is located at the second working position, the second end 202 of the direction valve 200 does not necessarily abut against the abutting surface 150, and it is also possible to limit the position only by abutting against the second limiting portion 162 and the toggle member 400.

It should be appreciated that in other embodiments, a drive mechanism may be provided to drive the toggle 400 to move so that it adjusts the position of the directional valve 200 to allow the directional valve 200 to be switched between the first and second operating positions. For example, the driving mechanism may be a motor screw transmission mechanism, a cylinder mechanism, a hydraulic cylinder mechanism, an electric push rod, or the like.

Further, the direction valve 200 may not be linearly slid with respect to the handpiece main body 100 to switch the working position, for example, in other embodiments, the direction valve 200 may be rotated with respect to the handpiece main body 100 to switch the working position, or the direction valve 200 may be rotated while being slid with respect to the handpiece main body 100 to switch the working position.

Referring to fig. 7, in the present embodiment, optionally, the inner water pipe 300 is inserted into the confluence passage 210 from the first end 201 of the direction valve 200 after passing through the insertion end 131, and the inner water pipe 300 is slidably engaged with the confluence passage 210, that is, when the direction valve 200 slides relative to the assembly hole 130, the inner water pipe 300 slides relative to the direction valve 200, and meanwhile, the direction valve 200 does not disengage from the inner water pipe 300 during sliding, so that the connection stability between the two is high.

Furthermore, the fitting hole 130 is provided with a holding ring 500, and the hole wall of the fitting hole 130 on the side of the holding ring 500 close to the insertion end 131 is provided with an internal thread. The inner water pipe 300 is externally sleeved with a fastener 600 and a first sealing element 700, the inner water pipe 300 penetrates through the abutting ring 500 and is inserted into the confluence channel 210, the fastener 600 is screwed in the assembling hole 130, and the first sealing element 700 is clamped in the fastener 600 and the abutting ring 500, so that the sealing performance is good, and liquid leakage is not easy to occur.

In this embodiment, optionally, the dental handpiece assembly further includes a plurality of second sealing members 800, and the plurality of second sealing members 800 are disposed in the assembly hole 130 and between the hole wall of the assembly hole 130 and the reversing valve 200, and are used for sealing the hole wall of the assembly hole 130 and the outer peripheral wall of the reversing valve 200.

It should be noted that the second sealing member 800 may be embedded in the assembly hole 130, and after the direction switching valve 200 is inserted into the assembly hole 130 from the insertion end 131 of the assembly hole 130, the wall of the assembly hole 130 and the direction switching valve 200 are sealed by the second sealing member 800. Or, the second sealing member 800 is sleeved outside the direction valve 200 and has a combined structure with the direction valve 200, and when the direction valve 200 is inserted into the assembly hole 130, the second sealing member 800 seals the hole walls of the direction valve 200 and the assembly hole 130. In this embodiment, the second sealing member 800 is sleeved outside the reversing valve 200 for example.

The number of the second sealing members 800 is five, the five second sealing members 800 are all sleeved outside the reversing valve 200, further, the peripheral wall of the reversing valve 200 is provided with five annular positioning grooves 240, the five second sealing members 800 are respectively arranged in the five annular positioning grooves 240, the position of the second sealing member 800 is accurate and reliable, the second sealing member is not easy to shift, and the sealing effect is good.

For convenience of description, it is assumed that, in a direction from the first end 201 to the second end 202 of the direction valve 200, the five second seals 800 are a seal a, a seal b, a seal c, a seal d, and a seal e, respectively, when the five second seals 800 are assembled with the direction valve 200, the first port 220 on the direction valve 200 is located between the seal c and the seal d, and the second port 230 on the direction valve 200 is located between the seal d and the seal e. When the directional valve 200 is in the first operating position, the first flow passage 110 is in communication with the first port 220, and both the first flow passage 110 and the first port 220 are located between seal d and seal e; when the directional valve 200 is in the second operating position, the second flow passage 120 is in communication with the second port 230, the second flow passage 120 and the second port 230 are both between seal d and seal e, and the first flow passage 110 is between seal b and seal c.

The first seal 700 and the second seal 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 and second seals 700 and 800 may be set differently.

In other embodiments, the dental bender head assembly further comprises an external conduit 900, the external conduit 900 being plugged into the second interface 230.

It should be noted that the inner peripheral wall of the mobile phone main body 100 is further provided with an annular air passage 170 for communicating with the air outlet 2020 of the motor 002, the annular air passage 170 is communicated with an air delivery pipe for delivering air to the front end 101 of the mobile phone main body 100, and the air and the water cooperate with each other at the front end 101 of the mobile phone main body 100 to form water mist.

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

The dental handpiece assembly provided by the embodiment can adjust the position of the reversing valve 200 as required during use, and when the reversing valve 200 is located at the first working position, the first interface 220 is communicated with the first flow passage 110, so that water delivery of the inner water channel can be realized. When the direction valve 200 is in the second operation, the second port 230 is communicated with the second flow passage 120, and water delivery from the external water passage can be realized. The head assembly has the advantages of diversified functions, flexible operation and high operation efficiency. Meanwhile, when the direction valve 200 is in the first operating position, the direction valve 200 can be appropriately adjusted to change the overlapping area of the first port 220 and the first flow passage 110, thereby adjusting the flow rate. Similarly, when the direction valve 200 is in the second operating position, the overlapping area of the second port 230 and the second flow passage 120 can be adjusted to adjust the flow rate.

Referring to fig. 8, the present embodiment further provides a dental bender including a motor 002 and the dental bender head assembly mentioned in the above embodiments, the motor 002 is inserted into the insertion hole 103 of the handpiece body 100, a liquid outlet 2001 of the motor 002 is communicated with the first flow channel 110, a gas outlet 2020 of the motor 002 is communicated with the annular gas channel 170, and the motor 002 is used for supplying water to the first flow channel 110 when the dental bender is used for conveying water through the internal water channel, so that the water flows from the first flow channel 110, the first connector 220 to the collecting channel 210, and finally flows out from the internal water pipe 300.

The dental hand bender that this embodiment provided can carry out interior water course water delivery or outer water course water delivery as required, and the function is diversified, and the flexible operation is reliable and the security is high.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A dental handpiece head assembly, comprising:

the mobile phone comprises a mobile phone main body, a first flow channel and a second flow channel, wherein the mobile phone main body is provided with the first flow channel and the second flow channel which are mutually independent, the first flow channel is used for being communicated with a liquid outlet of a motor, and the second flow channel is used for being communicated with an external pipeline;

the reversing valve is provided with a confluence channel, a first interface and a second interface which are communicated with the confluence channel; the reversing valve is movably connected with the mobile phone main body so as to be switched between a first working position and a second working position; when the first working position is adopted, the first interface is communicated with the first flow passage, and the second interface is blocked from the second flow passage; when the first working position is set, the first interface is blocked with the first flow passage and the second interface is communicated with the second flow passage;

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

2. The dental bender handpiece assembly of claim 1, wherein:

the mobile phone main body is provided with an assembly hole, and the first flow channel and the second flow channel are communicated with the assembly hole; the reversing valve is arranged in the assembly hole, and the reversing valve is matched with the mobile phone main body in a sliding manner in the extension direction of the mobile phone main body, so that the reversing valve can be switched between the first working position and the second working position.

3. The dental bender handpiece assembly of claim 2, wherein:

the mobile phone main body is provided with a front end used for extending into the oral cavity and a rear end close to an operator, the assembly hole is formed in the end face where the rear end is located, and the second flow channel is close to the rear end in comparison with the first flow channel.

4. The dental bender handpiece assembly of claim 2, wherein:

the dental bent handpiece also comprises a stirring piece, wherein the stirring piece is connected with the reversing valve, the stirring piece protrudes out of the peripheral surface of the handpiece main body, and the stirring piece and the handpiece main body are matched in a sliding way in the extending direction of the handpiece main body so as to drive the reversing valve to be switched between the first working position and the second working position.

5. The dental bender handpiece assembly of claim 4, wherein:

the mobile phone comprises a mobile phone body and is characterized in that a first limiting portion and a second limiting portion are arranged on the mobile phone body at intervals in the extending direction of the mobile phone body, the stirring piece is located between the first limiting portion and the second limiting portion, and the first limiting portion and the second limiting portion are used for alternatively abutting against the stirring piece so as to limit the sliding range of the stirring piece.

6. The dental bender handpiece assembly of claim 5, wherein:

when the reversing valve is located at the first working position, the stirring piece is abutted against the first limiting part; when the reversing valve is located at the second working position, the stirring piece is abutted against the second limiting part.

7. The dental bender handpiece assembly of claim 2, wherein:

the inner water pipe is inserted into the confluence channel and is matched with the reversing valve in a sliding manner in the extending direction of the mobile phone main body.

8. The dental bender handpiece assembly of claim 1, wherein:

the dental bending handpiece head assembly further comprises a sealing element, wherein the sealing element is arranged between the reversing valve and the handpiece main body and used for sealing a gap between the handpiece main body and the reversing valve.

9. A dental bender, characterized in that it comprises:

the dental handpiece assembly of any one of claims 1 to 8.

10. The dental bender according to claim 9, wherein:

the dental bending handpiece also comprises a motor and an external pipeline, the motor is in inserting fit with the handpiece main body, and a liquid outlet of the motor is communicated with the first flow channel; the external pipeline is connected with the mobile phone main body in an inserting mode and communicated with the second flow channel.

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