Water-gas mixing atomization dental handpiece

Abstract

The utility model relates to a water-gas mixing and atomizing dental handpiece. The water-gas mixing and atomizing dental handpiece comprises a handpiece head, a bearing seat and a handpiece core, a first channel and a second channel are arranged in the machine head, two water outlets are formed in one end of the first channel, and an air outlet is formed in one end of the second channel. The bearing seat is fixedly installed in the machine head shell, a working end face is arranged on the bearing seat, and a plurality of atomization holes are formed in the working end face. An annular groove and a transition face are arranged on the side face of the bearing seat, a gap exists between the transition face and the machine head, the two water outlets and the two air outlets face the transition face, and the atomization holes are communicated with the annular groove. The two water outlets are formed in the machine head, the water inlet amount in the machine head is increased, in addition, the gap is formed between the bearing seat and the machine head, water and air can conveniently enter the second channel from the first channel, under the action of high-pressure air, the water can be atomized from the atomization holes and sprayed out, and the situation of water backflow is avoided.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, in particular to a water-air mixed atomizing dental handpiece. Background Art

[0002] The atomizing nozzle is suitable for cooling the movement of the dental handpiece, and can cool the movement during work, thereby increasing the service life of the movement. In the existing atomizing nozzle, water and air interfere with each other. When the air pressure is too high, the water pressure will be forced to flow backward, and the water cannot be atomized and will be ejected from the head of the handpiece. Content of the Utility Model

[0003] (I) Technical Problems to be Solved

[0004] The utility model provides a water-air mixed atomizing dental handpiece, aiming at solving the problem that when the atomizing air pressure is too high in the prior art, water cannot be discharged or the water discharge is small at the head of the dental handpiece.

[0005] (II) Technical Solutions

[0006] To solve the above problems, the utility model provides a water-air mixed atomizing dental handpiece, which comprises: a head, a bearing seat and a movement;

[0007] A through hole is provided on one side of the head. A first channel and a second channel are provided in the head. One end of the first channel has two water outlets, and one end of the second channel has one air outlet;

[0008] The bearing seat is fixedly installed in the head shell, and a working end face is provided on the bearing seat. The working end face is flush with the end face of one end of the through hole. A plurality of atomizing holes are provided on the working end face; an annular groove and a transition surface are provided on the side surface of the bearing seat. The transition surface is connected to the first side of the annular groove. There is a gap between the transition surface and the head. Both of the two water outlets and the air outlet face the transition surface. The atomizing holes are communicated with the annular groove;

[0009] The movement is rotatably installed in the head shell, and one end of the movement can pass through the bearing seat and extend out of the working end face.

[0010] Preferably, the transition surface comprises a first annular inclined surface, an annular surface and a second annular inclined surface which are connected in sequence;

[0011] There is a gap between the annular surface and the head. The second annular inclined surface is connected to the first side of the annular groove.

[0012] Preferably, the side surface of the bearing seat further comprises a first annular sealing surface and a second annular sealing surface;

[0013] The contact surfaces of the bearing seat with the machine head are respectively the first annular sealing surface and the second annular sealing surface. Sealing strips are arranged on both the first annular sealing surface and the second annular sealing surface. The first annular sealing surface is located at the second side of the annular groove, and both the annular groove and the transition surface are located between the first annular sealing surface and the second annular sealing surface.

[0014] Preferably, a bearing is arranged in the bearing seat, and the inner ring of the bearing is sleeved on the movement mechanism.

[0015] Preferably, the water-air mixed atomizing dental handpiece further includes a handheld part;

[0016] The handheld part is fixedly connected to the machine head. A first air pipe and a water outlet pipe are arranged in the handheld part. One end of the first air pipe is connected to the inlet of the first channel, and one end of the water outlet pipe is connected to the inlet of the second channel.

[0017] Preferably, the water-air mixed atomizing dental handpiece further includes a driving component;

[0018] The driving component is installed in the machine head. A pneumatic turbine is rotatably arranged in the driving component, and one end of the movement mechanism is fixedly connected to the pneumatic turbine;

[0019] A third channel is arranged in the machine head, and the outlet of the third channel faces the pneumatic turbine;

[0020] A second air pipe is arranged in the handheld part. One end of the second air pipe is connected to the inlet of the third channel, and the second air pipe can convey positive-pressure gas into the third channel and drive the pneumatic turbine to rotate.

[0021] Preferably, three atomizing holes are arranged in an annular array on the working end face.

[0022] (III) Beneficial effects

[0023] By arranging two water outlets in the machine head, the present utility model increases the water inflow in the machine head. In addition, a gap is arranged between the bearing seat and the machine head, facilitating the separate entry of water and air from the first channel into the second channel, so that under the action of high-pressure air, water can be normally atomized and ejected from the atomizing holes, avoiding the occurrence of water backflow. Description of the drawings

[0024] Figure 1 is an overall structural schematic diagram of the water-air mixed atomizing dental handpiece of the present utility model;

[0025] Figure 2 is an exploded view of the machine head, bearing seat, movement mechanism and driving component of the present utility model;

[0026] Figure 3 This is the structural diagram of the handheld part in the present utility model;

[0027] Figure 4 This is the structural schematic diagram of the machine head in the present utility model;

[0028] Figure 5 This is the structural schematic diagram of the machine head from another perspective in the present utility model;

[0029] Figure 6 This is the side view of the bearing seat in the present utility model.

[0030]

Explanation of the reference numerals of the drawings

[0031] 1: Machine head; 10: Through hole; 11: First channel; 111: Water outlet; 12: Second channel; 121: Air outlet; 13: Third channel;

[0032] 2: Bearing seat; 21: Working end face; 22: Atomization hole; 23: Annular groove; 24: Transition surface; 241: First annular inclined surface; 242: Annular surface; 243: Second annular inclined surface; 25: First annular sealing surface; 26: Second annular sealing surface;

[0033] 3: Movement mechanism;

[0034] 4: Handheld part; 41: First air pipe; 42: Water outlet pipe; 43: Second air pipe; 5: Driving assembly; 51: Pneumatic turbine. Detailed implementation manners

[0035] In order to better explain the present utility model for easy understanding, the present utility model will be described in detail below in conjunction with the drawings through specific implementation manners.

[0036] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0037] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0038] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] The present utility model provides a water-air mixed atomizing dental handpiece, which is characterized in that the water-air mixed atomizing dental handpiece includes: a handpiece head 1, a bearing seat 2, and a movement 3. A through hole 10 is provided on one side of the handpiece head 1, and a first channel 11 and a second channel 12 are provided inside the handpiece head 1. One end of the first channel 11 has two water outlets 111, and one end of the second channel 12 has an air outlet 121. The bearing seat 2 is fixedly installed inside the housing of the handpiece head 1, and a working end face 21 is provided on the bearing seat 2. The working end face 21 is flush with the end face of one end of the through hole 10, and a plurality of atomizing holes 22 are provided on the working end face 21; an annular groove 23 and a transition surface 24 are provided on the side surface of the bearing seat 2. The transition surface 24 is connected to the first side of the annular groove 23, and there is a gap between the transition surface 24 and the handpiece head 1. Both water outlets 111 and the air outlet 121 face the transition surface 24, and the atomizing holes 22 communicate with the annular groove 23. The movement 3 is rotatably installed inside the housing of the handpiece head 1, and one end of the movement 3 can pass through the bearing seat 2 and extend out of the working end face 21.

[0040] The first channel 11 is connected to a water pump through a pipeline. The water pump supplies water into the first channel 11, and the water flows from the water outlets 111 to between the bearing seat 2 and the handpiece head 1. The second channel 12 is connected to a high-pressure gas through a pipeline. The high-pressure gas enters between the bearing seat 2 and the handpiece head 1 through the second channel 12. The water in the first channel 11 and the gas in the second channel 12 can enter the annular groove 23 along the transition surface 24 on the bearing seat 2. Under the action of the high-pressure gas, the water in the annular groove 23 sprays out and atomizes from the atomizing holes 22, and the atomized water vapor cools the movement 3. By providing two water outlets 111 inside the handpiece head 1, the present utility model increases the water inflow inside the handpiece head 1. In addition, a gap is provided between the bearing seat 2 and the handpiece head 1, which is convenient for water and gas to enter the second channel 12 from the first channel 11 respectively, so that under the action of high-pressure air, the water can be normally atomized and sprayed out from the atomizing holes 22, avoiding the occurrence of water backflow.

[0041] Further, the head 1 is a columnar object. The transition surface 24 includes a first annular inclined surface 241, an annular surface 242, and a second annular inclined surface 243 that are connected in sequence. There is a gap between the annular surface 242 and the head 1, and the second annular inclined surface 243 is connected to the first side of the annular groove 23. In the prior art, the annular surface 242 is generally hermetically connected to the bearing seat 2, and there is a notch on the annular surface 242. Water and gas flow into the annular groove 23 from the notch. Since the size of the notch is small, it will limit the flow rate of water and gas flowing into the annular groove 23. Therefore, when the air pressure connected to the second channel 12 is relatively high, the water in the first channel 11 will flow backward, resulting in the water not being able to enter the annular groove 23 and atomize and spray out from the atomizing holes 22. In the present utility model, the diameter of the annular surface 242 is directly made smaller than the inner diameter of the corresponding part on the bearing seat 2, thereby forming a gap between the head 1 and the bearing seat 2. Water and gas flow from the first annular inclined surface 241 to the annular surface 242, then enter the second annular inclined surface 243 from the annular surface 242, and finally enter the annular groove 23.

[0042] Furthermore, the side surface of the bearing seat 2 further includes a first annular sealing surface 25 and a second annular sealing surface 26. The contact surfaces of the bearing seat 2 with the head 1 are the first annular sealing surface 25 and the second annular sealing surface 26 respectively. Sealing strips are provided on both the first annular sealing surface 25 and the second annular sealing surface 26. The first annular sealing surface 25 is located at the second side of the annular groove 23, and the annular groove 23 and the transition surface 24 are both located between the first annular sealing surface 25 and the second annular sealing surface 26.

[0043] In a preferred embodiment, a bearing is provided in the bearing seat 2, and the inner ring of the bearing is sleeved on the movement core 3. Three atomizing holes 22 are annularly and arrayedly provided on the working end surface 21.

[0044] The water-air mixed atomizing dental handpiece further includes a handheld part 4. The handheld part 4 is fixedly connected to the head 1. A first air pipe 41 and a water outlet pipe 42 are provided in the handheld part 4. One end of the first air pipe 41 is connected to the inlet of the first channel 11, and one end of the water outlet pipe 42 is connected to the inlet of the second channel 12.

[0045] Finally, the water-air mixed atomizing dental handpiece further includes a driving assembly 5. The driving assembly 5 is installed in the head 1. A pneumatic turbine 51 is rotatably provided in the driving assembly 5. One end of the movement core 3 is fixedly connected to the pneumatic turbine 51. A third channel 13 is provided in the head 1, and the outlet of the third channel 13 faces the pneumatic turbine 51. A second air pipe 43 is provided in the handheld part 4. One end of the second air pipe 43 is connected to the inlet of the third channel 13, and the second air pipe 43 can convey positive pressure gas into the third channel 13 and drive the pneumatic turbine 51 to rotate.

[0046] It should be understood that the above description of the specific embodiments of the present utility model is only for explaining the technical route and features of the present utility model, and its purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly. However, the present utility model is not limited to the above specific embodiments. All changes or modifications made within the scope of the claims of the present utility model should be covered by the protection scope of the present utility model.

Claims

1. A water-vapor mixed atomization dental handpiece, characterized in that, The water-air mixed atomization dental handpiece includes: a head (1), a bearing seat (2), and a movement (3); One side of the head (1) is provided with a through hole (10). A first channel (11) and a second channel (12) are arranged in the head (1). One end of the first channel (11) has two water outlets (111), and one end of the second channel (12) has an air outlet (121); The bearing seat (2) is fixedly installed inside the housing of the head (1), and a working end face (21) is arranged on the bearing seat (2). The working end face (21) is flush with the end face of one end of the through hole (10). A plurality of atomization holes (22) are arranged on the working end face (21); An annular groove (23) and a transition surface (24) are arranged on the side surface of the bearing seat (2). The transition surface (24) is connected to the first side of the annular groove (23). There is a gap between the transition surface (24) and the head (1). The two water outlets (111) and the air outlet (121) all face the transition surface (24), and the atomization holes (22) communicate with the annular groove (23); The movement (3) is rotatably installed in the head (1), and one end of the movement (3) can pass through the bearing seat (2) and extend out of the working end face (21).

2. The water-vapor mixed atomization dental handpiece according to claim 1, wherein The transition surface (24) includes a first annular inclined surface (241), an annular surface (242), and a second annular inclined surface (243) connected in sequence; There is a gap between the annular surface (242) and the head (1), and the second annular inclined surface (243) is connected to the first side of the annular groove (23).

3. The water-vapor mixed atomization dental handpiece according to claim 2, wherein, The side surface of the bearing seat (2) further includes a first annular sealing surface (25) and a second annular sealing surface (26); The contact surfaces of the bearing seat (2) with the head (1) are respectively the first annular sealing surface (25) and the second annular sealing surface (26). Sealing strips are arranged on both the first annular sealing surface (25) and the second annular sealing surface (26). The first annular sealing surface (25) is located at the second side of the annular groove (23), and the annular groove (23) and the transition surface (24) are both located between the first annular sealing surface (25) and the second annular sealing surface (26).

4. The water-vapor mixed atomization dental handpiece according to any one of claims 1-3, characterized in that, A bearing is arranged inside the bearing seat (2), and the inner ring of the bearing is sleeved on the movement (3).

5. The water-vapor mixed atomization dental handpiece according to any one of claims 1-3, characterized in that, The water-air mixed atomization dental handpiece further includes a handheld part (4); The handheld part (4) is fixedly connected to the head (1). A first air pipe (41) and a water outlet pipe (42) are arranged inside the handheld part (4). One end of the first air pipe (41) is connected to the inlet of the first channel (11), and one end of the water outlet pipe (42) is connected to the inlet of the second channel (12).

6. The water-vapor mixed atomization dental handpiece according to claim 5, characterized in that, The water-air mixed atomization dental handpiece further includes a driving component (5); The driving component (5) is installed in the machine head (1). An air turbine (51) is rotatably arranged in the driving component (5), and one end of the movement (3) is fixedly connected to the air turbine (51). A third channel (13) is arranged in the machine head (1), and the outlet of the third channel (13) faces the air turbine (51). A second air pipe (43) is arranged in the hand-held part (4). One end of the second air pipe (43) is connected to the inlet of the third channel (13), and the second air pipe (43) can convey positive-pressure gas into the third channel (13) to drive the air turbine (51) to rotate.

7. The water-vapor mixed atomization dental handpiece according to any one of claims 1-3, characterized in that Three atomization holes (22) are arranged in an annular array on the working end face (21).

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