Pneumatic dental handpiece structure capable of scramming

Abstract

The utility model provides a pneumatic dental handpiece structure capable of scramming, which belongs to the field of dental equipment and comprises a pneumatic turbine mounted in a handpiece and a middle shaft fixedly connected with the pneumatic turbine, and an elastic scramming pad is sleeved on the middle shaft; the elastic emergency stop pad is a trumpet-shaped elastic soft pad with the diameter of one end larger than that of the other end, the large-diameter end of the elastic emergency stop pad is close to the pneumatic turbine and fixedly connected to the inner wall of the machine head, and the small-diameter end of the elastic emergency stop pad is matched with the middle shaft in an attached mode. The middle shaft is not influenced by the elastic emergency stop pad, normally rotates and outputs power outwards; when air supply is stopped, negative pressure is generated in the machine head, the elastic emergency stop pad shrinks and rebounds and tightly holds the middle shaft, inertial rotation of the middle shaft is prevented, and the advantage of emergency stop is achieved; in addition, the air inlet channel and the air outlet channel are arranged, a complete air channel is formed, disordered air exhausting of the machine head is avoided, and the zero-air-exhausting effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of dental equipment, in particular to a pneumatic dental mobile phone structure capable of emergency stop. Background Art

[0002] Pneumatic dental handpieces, also known as high-speed dental turbine handpieces, utilize compressed air as a power source to drive a turbine that rotates at high speeds, reaching hundreds of thousands of revolutions per minute. This allows for precise drilling, grinding, and cutting of teeth. Pneumatic dental handpieces are an indispensable tool in dental practice due to their high speed, high efficiency, ease of operation, and simple maintenance.

[0003] Pneumatic dental handpieces, a core tool in dental care, demonstrate exceptional performance in dental treatment due to their high-speed rotation. However, this device has a significant drawback: after the air supply stops, the inertia of the pneumatic turbine causes it to rotate for several seconds, creating negative pressure within the handpiece cavity. This can cause backflow, drawing in mist, saliva, and dust from the treatment process. Therefore, improper cleaning and disinfection of pneumatic dental handpieces significantly increases the risk of cross-infection between doctors and patients, and between patients. Utility Model Content

[0004] Based on the above-mentioned problems in the prior art, the utility model provides a pneumatic dental handpiece structure that can be stopped suddenly, including a pneumatic turbine that is rotatably installed in the handpiece and a central shaft that is fixedly connected to the pneumatic turbine, and an elastic emergency stop pad is sleeved on the central shaft; the elastic emergency stop pad is a trumpet-shaped elastic soft pad with a diameter at one end larger than the diameter at the other end, the end with the large diameter is close to the pneumatic turbine and fixedly connected to the inner wall of the handpiece, and the end with the small diameter fits closely with the central shaft.

[0005] Among them, the structure of the pneumatic dental mobile phone that can stop suddenly also includes a hollow handle, one end of the hollow handle is equipped with a machine head, and the other end is provided with an insertion opening for inserting lines and pipes; the machine head includes a shell, the shell includes an integrally formed connecting part and a mounting part, the axial direction of the connecting part and the axial direction of the mounting part are perpendicular to each other, the connecting part and the hollow handle are fixedly connected, a mounting cavity is provided in the mounting part, a front mounting seat and a rear mounting seat are fixedly installed in the mounting cavity, a front bearing is fixedly installed in the front mounting seat, and a rear bearing is fixedly installed in the rear mounting seat, the front bearing and the rear bearing are coaxially arranged, the central shaft is rotatably connected to the front mounting seat and the rear mounting seat through the front bearing and the rear bearing respectively, and the central shaft and the mounting part are concentrically arranged, the pneumatic turbine is installed between the front bearing and the rear bearing, and the elastic emergency stop pad is installed between the front mounting seat and the front bearing.

[0006] Wherein, the front mounting seat is provided with an annular mounting groove for mounting an elastic emergency stop pad, and one end of the elastic emergency stop pad with a large diameter is provided with a fixing ring that matches and is embedded in the annular mounting groove.

[0007] Among them, a cooling water ring groove and a cooling air ring groove are provided on the circumferential side of the front mounting seat; a plurality of air jets and water spray outlets are provided at the front end of the front mounting seat, all the air jets are connected to the cooling air ring groove and are evenly distributed circumferentially, and all the water spray outlets are connected to the cooling water ring groove and are evenly distributed circumferentially; a cooling air channel and a cooling water channel are provided at the connecting part of the shell, one end of the cooling air channel is connected to the cooling air source, and the other end is connected to the cooling air ring groove; one end of the cooling water channel is connected to the cooling water source, and the other end is connected to the cooling water ring groove.

[0008] In which, the connecting part of the shell is also provided with an air inlet and an air outlet, one end of the air inlet is connected to the high-pressure air source, and the opening of the other end of the air inlet is facing the blades of the pneumatic turbine, and the width of the pneumatic turbine is larger than the opening of the air inlet so that the side of the pneumatic turbine can completely cover the opening of the air inlet; one end of the air outlet is connected to the vacuum pump, and the other end of the air outlet is connected to the installation cavity and the opening diameter of the air outlet is larger than the width of the pneumatic turbine.

[0009] The front end of the front mounting seat is in contact with the inner wall of the mounting cavity, and the rear end of the mounting portion is installed with a threaded cover through a threaded connection, and the threaded cover is pressed onto the rear mounting seat. The rear mounting seat, rear bearing, front mounting seat and front bearing are fixedly installed in the mounting cavity by the pressure of the threaded cover, and the rear end of the threaded cover is also clamped and installed with a rear end cover, and a conical spring is arranged between the rear end cover and the rear mounting seat, the small end of the conical spring is close to the rear mounting seat, and the large end of the conical spring is close to the rear end cover.

[0010] The utility model has the beneficial effects:

[0011] 1. An elastic emergency stop pad is installed on the central axis. During normal operation, the higher air pressure will expand the elastic emergency stop pad, and the central axis will not be affected by the elastic emergency stop pad and will rotate normally and output power to the outside. When the air supply is stopped, negative pressure is generated inside the machine head, and the elastic emergency stop pad shrinks and rebounds to hold the central axis tightly, preventing the inertial rotation of the central axis, which has the advantage of emergency stop.

[0012] 2. An air inlet and an air outlet are set in the handpiece. Air is supplied through the air inlet and extracted through the air outlet, forming a complete air path to prevent the air in the handpiece from moving around randomly and achieving the purpose of zero exhaust, avoiding affecting the user experience and treatment effect due to random exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention is a three-dimensional structural diagram of a pneumatic dental handpiece capable of emergency stop.

[0014] Figure 2 The present invention is a cross-sectional schematic diagram of the structure of a pneumatic dental handpiece capable of emergency stop.

[0015] Figure 3 It is a structural diagram of the machine head.

[0016] Figure 4 It is a cross-sectional schematic diagram of the machine head.

[0017] Figure 5 This is a schematic diagram of the explosion structure of the nose.

[0018] Figure 6 This is a diagram showing the coordination between the starter turbine and the front mounting seat.

[0019] Figure 7 yes Figure 6 Schematic cross-section of the structure.

[0020] Figure 8 This is a schematic diagram of the coordination between the central axis and the elastic emergency stop pad.

[0021] Figure 9 It is a schematic diagram of the three-dimensional structure of the elastic emergency stop pad.

[0022] Figure 10 It is a schematic diagram of the cross-sectional structure of the elastic emergency stop pad. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] As attached Figure 1-10The structure of a pneumatic dental handpiece capable of emergency stop shown in the figure comprises a hollow handle 1, a machine head 2 being mounted on one end of the hollow handle 1, and an insertion opening 3 for inserting lines and pipes being provided at the other end. Pipes such as the cooling air pipe, cooling water pipe, air inlet pipe and air outlet pipe all pass through the hollow handle 1 through the insertion opening 3 and are connected to corresponding interfaces provided on the machine head 2. The head 2 includes a shell, which includes an integrally formed connecting portion 4 and a mounting portion 5. The axial direction of the connecting portion 4 and the axial direction of the mounting portion 5 are perpendicular to each other to form a 90° right-angle structure. The connecting portion 4 is fixedly connected to the hollow handle 1 through a threaded structure. A mounting cavity is provided in the mounting portion 5, and a front mounting seat 6 and a rear mounting seat 7 are fixedly installed in the mounting cavity. A front bearing 8 is fixedly installed in the front mounting seat 6, and a rear bearing 9 is fixedly installed in the rear mounting seat 7. The front bearing 8 and the rear bearing 9 are coaxially arranged, and the same central axis 10 is rotatably installed on the front bearing 8 and the rear bearing 9, so that the central axis 10 is rotatably connected to the front mounting seat 6 and the rear mounting seat 7 through the front bearing 8 and the rear bearing 9 respectively, and the central axis 10 and the mounting portion 5 are concentrically arranged, and the central axis 10 is on the front bearing 8 An air turbine 11 is fixedly installed between the front and rear bearings 9, and the air turbine 11 is installed in the handpiece 2 to realize rotation. An elastic emergency stop pad 12 is sleeved on the central axis 10 between the front mounting seat 6 and the front bearing 8; the elastic emergency stop pad 12 is a trumpet-shaped elastic soft pad with a diameter at one end larger than the diameter at the other end. The end with a large diameter is close to the air turbine 11 and spans the entire inner cavity of the handpiece 2 and is fixedly connected to the inner wall of the handpiece 2. The end with a small diameter fits the central axis 10. The elastic force of the elastic emergency stop pad 12 during elastic deformation recovery is less than the minimum air pressure of the pneumatic dental handpiece; an annular mounting groove 13 for mounting the elastic emergency stop pad 12 is provided on the front mounting seat 6, and a fixing ring 14 is provided on the large diameter end of the elastic emergency stop pad 12 to match the annular mounting groove 13.

[0025] As a preferred embodiment, the circumferential side of the front mounting seat 6 is provided with a cooling water ring groove 15 and a cooling air ring groove 16; the front end of the front mounting seat 6 is provided with an air jet 17 and a water spray port 18, and three air jets 17 and water spray ports 18 are provided. All air jets 17 are connected to the cooling air ring groove 16 and are evenly distributed around the circumference. The three air jets 17 are spaced 120 degrees apart from each other. All water spray ports 18 are connected to the cooling water ring groove 15 and are evenly distributed around the circumference. The three water spray ports 18 are also spaced 120 degrees apart from each other. , and an air jet 17 and a water jet 18 are correspondingly arranged on the same radius, the water jet 18 is located on the outside, and the air jet 17 is located on the inside; the connecting portion 4 of the shell is provided with a cooling air channel 19 and a cooling water channel 20, one end of the cooling air channel 19 is connected to the cooling air source through a cooling air pipe, and the other end is connected to the cooling air ring groove 16; one end of the cooling water channel 20 is connected to the cooling water source through a cooling water pipe, and the other end is connected to the cooling water ring groove 15, so as to supply cooling air and cooling water to the working area. The connecting portion 4 of the shell is also provided with an air inlet 21 and an air outlet 22. One end of the air inlet 21 is connected to the high-pressure air source through an air inlet pipe, and the opening of the other end of the air inlet 21 is opposite to the blades of the pneumatic turbine 11, and the width of the pneumatic turbine 11 is greater than the opening of the air inlet 21, so that the side of the pneumatic turbine 11 can completely cover the opening of the air inlet 21, so that the high-pressure air ejected from the air inlet 21 can completely act on the pneumatic turbine 11, reducing the loss of kinetic energy; one end of the air outlet 22 is connected to the exhaust fan through the air outlet pipe, and the other end of the air outlet 22 is connected to the installation cavity and the opening diameter of the air outlet 22 is greater than the width of the pneumatic turbine 11, so that the air outlet 22 can better extract the air in the installation cavity, avoiding the head 2 from exhausting air in other places. The front end of the front mounting seat 6 is in contact with the inner wall of the mounting cavity, and the rear end of the mounting portion 5 is installed with a threaded cover 23 through a threaded connection, and the threaded cover 23 is pressed onto the rear mounting seat 7. The rear mounting seat 7, the rear bearing 9, the front mounting seat 6 and the front bearing 8 are fixedly installed in the mounting cavity by the pressure of the threaded cover 23. The rear end of the threaded cover 23 is also clamped and installed with a rear end cover 24. A conical spring is provided between the rear end cover 24 and the rear mounting seat 7. The small end of the conical spring is in close contact with the rear mounting seat 7, and the large end of the conical spring is in close contact with the rear end cover 24. A slot is provided at the rear end of the threaded cover 23 to limit the movable stroke of the rear end cover 24.

[0026] The pneumatic dental handpiece structure provided in this embodiment provides compressed air to the handpiece head 2 when in use, and the air pressure of the compressed air drives the pneumatic turbine 11 to rotate and output power to the outside. When rotation is required, compressed air is ejected from the air inlet 21 and rushes towards the pneumatic turbine 11, and the air pressure drives the pneumatic turbine 11 to rotate and drives the central axis 10 to rotate. At the same time, the compressed air passing through the pneumatic turbine 11 will flow from the gap to other positions of the installation cavity, thereby increasing the air pressure in the installation cavity, making the air pressure on the rear side of the elastic emergency stop pad 12 greater than the air pressure on the front side, thereby using the air pressure to open the small diameter end of the elastic emergency stop pad 12 and release the restriction on the rotation of the central axis 10, so that the central axis 10 can rotate and work normally. In addition, the air in the installation cavity is extracted through the air outlet 22 and will not be discharged in other places, achieving the purpose of zero exhaust.

[0027] When it is necessary to stop rotation, the supply of compressed air stops, and the pneumatic turbine 11 continues to rotate due to inertia. The pressure inside the head 2 changes and forms a negative pressure. At this time, the elastic emergency stop pad 12 is affected by the negative pressure, and the small diameter end shrinks and rebounds to hold the central axis 10, preventing the inertial rotation of the central axis 10 and achieving the emergency stop effect. This structure is set to prevent foreign matter such as blood and viruses from entering the interior of the mobile phone through the head 2 due to pressure changes when the dental mobile phone stops working. At the same time, since there is no foreign matter invading the movement, the service life of the mobile phone bearing is greatly improved.

[0028] The above-described embodiment merely represents one embodiment of the present invention. While the description is relatively specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A pneumatic dental handpiece structure capable of emergency stop, comprising a hollow handle (1), a pneumatic turbine (11) rotatably mounted in a handpiece head (2), and a central shaft (10) fixedly connected to the pneumatic turbine (11), characterized in that: An elastic emergency stop pad (12) is sleeved on the central axis (10); the elastic emergency stop pad (12) is a trumpet-shaped elastic soft pad with a diameter at one end larger than that at the other end, the end with the larger diameter is close to the pneumatic turbine (11) and fixedly connected to the inner wall of the machine head (2), and the end with the smaller diameter is fitted with the central axis (10); one end of the hollow handle (1) is equipped with the machine head (2), and the other end is provided with an insertion opening (3) for inserting lines and pipes; the machine head (2) includes a shell, and the shell includes a The invention comprises an integrally formed connecting portion (4) and a mounting portion (5), wherein the axial direction of the connecting portion (4) and the axial direction of the mounting portion (5) are perpendicular to each other, the connecting portion (4) and the hollow handle (1) are fixedly connected, a mounting cavity is provided in the mounting portion (5), a front mounting seat (6) and a rear mounting seat (7) are fixedly installed in the mounting cavity, a front bearing (8) is fixedly installed in the front mounting seat (6), a rear bearing (9) is fixedly installed in the rear mounting seat (7), and the front bearing (8) and the rear bearing (9) are coaxially arranged. The central shaft (10) is rotatably connected to the front mounting seat (6) and the rear mounting seat (7) through the front bearing (8) and the rear bearing (9), respectively, and the central shaft (10) and the mounting portion (5) are concentrically arranged. The pneumatic turbine (11) is installed between the front bearing (8) and the rear bearing (9), and the elastic emergency stop pad (12) is installed between the front mounting seat (6) and the front bearing (8). The connecting portion (4) of the housing is also provided with an air inlet (21) and an air outlet (22). One end of the air duct (21) is connected to a high-pressure air source, the opening of the other end of the air inlet duct (21) faces the blades of the pneumatic turbine (11), and the width of the pneumatic turbine (11) is greater than the opening of the air inlet duct (21), so that the side of the pneumatic turbine (11) can completely cover the opening of the air inlet duct (21); one end of the air outlet duct (22) is connected to an air pump, the other end of the air outlet duct (22) is connected to the installation cavity, and the opening diameter of the air outlet duct (22) is greater than the width of the pneumatic turbine (11).

2. The pneumatic dental handpiece structure capable of emergency stop according to claim 1, characterized in that: The front mounting seat (6) is provided with an annular mounting groove (13) for mounting an elastic emergency stop pad (12); a fixing ring (14) matching and embedded in the annular mounting groove (13) is provided at one end of the large diameter of the elastic emergency stop pad (12).

3. The pneumatic dental handpiece structure capable of emergency stop according to claim 2, characterized in that: The front mounting seat (6) is provided with a cooling water ring groove (15) and a cooling air ring groove (16) on its circumferential side; a plurality of air jets (17) and water jets (18) are provided at the front end of the front mounting seat (6); all the air jets (17) are connected to the cooling air ring groove (16) and are evenly distributed around the circumference; all the water jets (18) are connected to the cooling water ring groove (15) and are evenly distributed around the circumference; the connecting portion (4) of the shell is provided with a cooling air channel (19) and a cooling water channel (20); one end of the cooling air channel (19) is connected to a cooling air source, and the other end is connected to the cooling air ring groove (16); one end of the cooling water channel (20) is connected to a cooling water source, and the other end is connected to the cooling water ring groove (15).

4. The pneumatic dental handpiece structure capable of emergency stop according to claim 3, characterized in that: The front end of the front mounting seat (6) contacts the inner wall of the mounting cavity, and the rear end of the mounting portion (5) is installed with a threaded cover (23) through a threaded connection, and the threaded cover (23) is pressed onto the rear mounting seat (7). The rear mounting seat (7), the rear bearing (9), the front mounting seat (6) and the front bearing (8) are fixedly installed in the mounting cavity by the pressure of the threaded cover (23). The rear end of the threaded cover (23) is also clamped and installed with a rear end cover (24). A tower spring is provided between the rear end cover (24) and the rear mounting seat (7), the small end of the tower spring is in close contact with the rear mounting seat (7), and the large end of the tower spring is in close contact with the rear end cover (24).

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