A shock absorbing device for an electric toothbrush head

Abstract

This utility model relates to the field of electric toothbrush technology, and more particularly to an electric toothbrush head shock absorption device, including a housing and a connecting shaft. The connecting shaft is rotatably connected to the side wall of the housing. An adjustment mechanism is provided inside the housing. The adjustment mechanism includes a shock absorption cavity, a fixing ring, a drive shaft, a cam, a fixing plate, and a extraction cylinder. The shock absorption cavity is fixedly connected to the inner side wall of the housing, and the fixing ring is fixedly connected to the inner side wall of the shock absorption cavity. This utility model, through the high vacuum degree inside the shock absorption cavity and the cooperation of the shock-absorbing cotton, significantly reduces the vibration and sound transmitted from the housing to the outside, greatly improves the grip feel, makes the user feel more comfortable, and reduces the damage of vibration to rubber and other seals, improving the overall sealing performance of the device and enabling the electric toothbrush to maintain a high sealing degree for a longer period of time.

Description

Technical Field

[0001] This utility model relates to the field of electric toothbrush technology, and in particular to an electric toothbrush head shock absorption device. Background Technology

[0002] An electric toothbrush is an everyday product that uses electricity to rotate or vibrate the brush head to clean teeth. With its increasing application and promotion in recent years, it has become widely used.

[0003] Current electric toothbrushes do not employ effective shock absorption measures. When an electric toothbrush is in use, the vibration inside the toothbrush is transmitted outward through the casing, and the hand can clearly feel the vibration, resulting in a poor user experience. Utility Model Content

[0004] The purpose of this utility model is to solve the following shortcomings in the existing technology: current electric toothbrushes do not take effective shock absorption measures. When the electric toothbrush is used, the vibration inside the toothbrush will be transmitted to the outside through the shell, and the hand will also feel the vibration, resulting in a poor user experience. Therefore, an electric toothbrush head shock absorption device is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An electric toothbrush head shock absorption device includes a housing and a connecting shaft, wherein the connecting shaft is rotatably connected to the side wall of the housing;

[0007] The housing is equipped with an adjustment mechanism, which includes a shock-absorbing cavity, a fixing ring, a drive shaft, a cam, a fixing plate, and a extraction cylinder. The shock-absorbing cavity is fixedly connected to the inner side wall of the housing, the fixing ring is fixedly connected to the inner side wall of the shock-absorbing cavity, the drive shaft is rotatably connected to the side wall of the fixing ring, the cam is fixedly connected to the side wall of the drive shaft, the fixing plate is fixedly connected to the side wall of the fixing ring, and the extraction cylinder is fixedly connected to the side wall of the fixing plate.

[0008] Preferably, a sealing plug is slidably connected to the inner wall of the extraction cylinder, and a sliding rod is fixedly connected to the side wall of the sealing plug, the sliding rod being slidably connected to one side wall of the extraction cylinder.

[0009] Preferably, a pressing plate is fixedly connected to the end of the slide rod away from the sealing plug, and the cam is slidably connected to the pressing plate.

[0010] Preferably, a motor is fixedly connected to the side wall of the fixed ring, a rotating rod is fixedly connected to the output end of the motor, a first adjusting disc is fixedly connected to the outer surface of the rotating rod, a second adjusting disc is fixedly connected to the outer surface of the drive shaft, and a belt is adjusted between the first adjusting disc and the second adjusting disc.

[0011] Preferably, an air inlet pipe is fixedly connected between the extraction cylinder and the shock absorption cavity, and an air outlet pipe is fixedly connected between the extraction cylinder and the housing. Both the air inlet pipe and the air outlet pipe have one-way valves.

[0012] Preferably, an adjusting spring is fixedly connected between the extrusion plate and the extraction cylinder, a first gear is fixedly connected to the end of the rotating rod away from the motor, a brush rod is rotatably connected to the upper end face of the fixing ring, a second gear is fixedly connected to the upper end face of the brush rod, the first gear and the second gear are meshed, a first connecting rod is hinged to the upper end face of the second gear, a second connecting rod is fixedly connected to the lower end face of the connecting shaft, and the first connecting rod and the second connecting rod are hinged.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. By combining the high vacuum in the shock-absorbing chamber with the shock-absorbing cotton, the vibration and sound transmitted from the shell to the outside are greatly reduced, significantly improving the grip and making the user feel more comfortable. The absorption of vibration reduces the damage to rubber and other seals, improves the overall sealing performance of the device, and allows the electric toothbrush to maintain a high level of sealing for a longer period of time.

[0015] 2. Through the cooperation of structures such as cam, extrusion plate, and extraction cylinder, the rotation of the electric toothbrush during use drives the device to continuously extract the gas that has seeped into the shock absorption chamber, maintaining a high vacuum level and ensuring the shock absorption effect. Even after the seal fails, the shock absorption chamber can still maintain a high vacuum level during use, ensuring the shock absorption effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the connecting shaft structure of an electric toothbrush head shock absorption device proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the shock-absorbing cavity structure of an electric toothbrush head shock-absorbing device proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of the extraction cylinder structure of an electric toothbrush head shock absorption device proposed in this utility model;

[0019] Figure 4 for Figure 2 A magnified view of part A in the image.

[0020] In the diagram: 1. Housing, 2. Connecting shaft, 3. Shock-absorbing chamber, 4. Fixing ring, 5. Drive shaft, 6. Cam, 7. Fixing plate, 8. Extraction cylinder, 9. Sealing plug, 10. Slide rod, 11. Extrusion plate, 12. Motor, 13. Rotating rod, 14. First adjusting plate, 15. Second adjusting plate, 16. Belt, 17. Inlet pipe, 18. Outlet pipe, 19. Adjusting spring, 20. First gear, 21. Brush rod, 22. Second gear, 23. First connecting rod, 24. Second connecting rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] The terms used in this utility model, such as "upper", "lower", "left", "right", "middle" and "one", are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0023] Reference Figures 1-4 An electric toothbrush head shock absorption device includes a housing 1 and a connecting shaft 2. The connecting shaft 2 is rotatably connected to the side wall of the housing 1 and has a groove for connecting with the brush head. An adjustment mechanism is provided inside the housing 1. The adjustment mechanism includes a shock absorption cavity 3, a fixing ring 4, a drive shaft 5, a cam 6, a fixing plate 7, and an extraction cylinder 8. The shock absorption cavity 3 is fixedly connected to the inner side wall of the housing 1. The shock absorption cavity 3 is a hollow cavity and is filled with sound insulation cotton. The gas inside the shock absorption cavity 3 is extracted, and the interior is close to a vacuum. The sound insulation cotton is used for support to prevent the vibration damping cavity 3 from breaking due to vacuum negative pressure. The high vacuum degree, combined with the sound insulation cotton, has a good ability to isolate and absorb vibrations and sounds of various frequencies. The vacuum environment also isolates water vapor and extends the life of the sound insulation cotton. The fixing ring 4 is fixedly connected to the inner wall of the vibration damping cavity 3. The drive shaft 5 is rotatably connected to the side wall of the fixing ring 4. The cam 6 is fixedly connected to the side wall of the drive shaft 5. The fixing plate 7 is fixedly connected to the side wall of the fixing ring 4. The extraction cylinder 8 is fixedly connected to the side wall of the fixing plate 7.

[0024] A sealing plug 9 is slidably connected to the inner wall of the extraction cylinder 8. A slide rod 10 is fixedly connected to the side wall of the sealing plug 9. The slide rod 10 is slidably connected to one side wall of the extraction cylinder 8. The slide rod 10 and the extraction cylinder 8 are not sealed. A pressing plate 11 is fixedly connected to the end of the slide rod 10 away from the sealing plug 9. The cam 6 is slidably connected to the pressing plate 11. An adjusting spring 19 is fixedly connected between the pressing plate 11 and the extraction cylinder 8.

[0025] A motor 12 is fixedly connected to the side wall of the fixed ring 4. A rotating rod 13 is fixedly connected to the output end of the motor 12. A first adjusting disc 14 is fixedly connected to the outer surface of the rotating rod 13. A second adjusting disc 15 is fixedly connected to the outer surface of the drive shaft 5. A belt 16 is adjusted between the first adjusting disc 14 and the second adjusting disc 15. The diameter of the second adjusting disc 15 is much larger than that of the first adjusting disc 14, which is used to reduce the rotation speed of the rotating rod 13, reduce speed and increase torque, so that the cam 6 has enough force and contacts the extrusion plate 11 at a lower speed, and matches the rebound speed of the adjusting spring 19.

[0026] An air inlet pipe 17 is fixedly connected between the extraction cylinder 8 and the shock-absorbing chamber 3, and an air outlet pipe 18 is fixedly connected between the extraction cylinder 8 and the housing 1. Both the air inlet pipe 17 and the air outlet pipe 18 have one-way valves. The gas flow direction of the one-way valve in the air inlet pipe 17 is from the shock-absorbing chamber 3 to the extraction cylinder 8, and the gas flow direction of the one-way valve in the air outlet pipe 18 is from the extraction cylinder 8 to the outside.

[0027] A first gear 20 is fixedly connected to the end of the rotating rod 13 away from the motor 12. A brush rod 21 is rotatably connected to the upper end face of the fixed ring 4. A second gear 22 is fixedly connected to the upper end face of the brush rod 21. The first gear 20 and the second gear 22 are meshed together. A first connecting rod 23 is hinged to the upper end face of the second gear 22. A second connecting rod 24 is fixedly connected to the lower end face of the connecting shaft 2. The first connecting rod 23 and the second connecting rod 24 are hinged together. The first gear 20, the brush rod 21, the second gear 22, the connecting rod 23, and the second connecting rod 24 constitute a mechanism that makes the connecting shaft 2 swing back and forth. Its motion trajectory and specific connection method are all existing electric toothbrush technologies, which will not be elaborated on here.

[0028] In this invention, when in use, the motor 12 is first turned on to drive the rotating rod 13 to rotate. The rotating rod 13 drives the first gear 20 to rotate, and the first gear 20 drives the second gear 22 and the brush rod 21 to rotate. The second gear 22 drives the first connecting rod 23 and the second connecting rod 24 to make the connecting shaft 2 oscillate at high frequency, brushing the teeth. Due to the shock-absorbing cotton in the shock-absorbing cavity 3 and the near-vacuum environment, vibrations and sounds of various frequencies are absorbed, greatly reducing the vibrations and sounds transmitted from the shell 1 and greatly improving the grip.

[0029] Rotating rod 13 drives the first adjusting plate 14 to rotate. The first adjusting plate 14 drives the second adjusting plate 15 to rotate via belt 16. The second adjusting plate 15 drives the drive shaft 5 and cam 6 to rotate. The diameter of the second adjusting plate 15 is much larger than that of the first adjusting plate 14, which reduces the speed and increases the torque of the drive shaft 5. When cam 6 rotates and approaches the extrusion plate 11, it extrudes the extrusion plate 11 and compresses the adjusting spring 19. The extrusion plate 11 drives the slide rod 10 and the sealing plug 9 to move closer to the extraction cylinder 8. The one-way valve in the air inlet pipe 17 is closed, and the one-way valve in the air outlet pipe 18 is opened. The gas in the extraction cylinder 8 is discharged to the outside through the air outlet pipe 18. When cam 6 moves away from the extrusion plate 11, the extrusion force on the extrusion plate 11 disappears. Under the elastic force of the adjusting spring 19, the extrusion plate 11 drives the slide rod 10 and the sealing plug 9 to reset. The internal one-way valve opens, and the internal one-way valve in the air outlet pipe 18 closes. The gas in the damping chamber 3 enters the extraction cylinder 8 through the air inlet pipe 17. As the cam 6 rotates continuously, the damping chamber 3 is kept in a near-vacuum environment. When the gas in the damping chamber 3 decreases significantly, the extraction cylinder 8 becomes negatively pressured. The adjusting spring 19 cannot drive the sealing plug 9 to reset, and the cam 6 no longer contacts the extrusion plate 11 until gas seeps into the damping chamber 3 again, maintaining a high vacuum in the damping chamber 3. This prevents the rubber and other seals from aging due to vibration during toothbrush use, which would reduce the sealing performance and cause moisture and water to enter the damping cotton, thus failing the vacuum environment. Even after the sealing performance decreases, a high vacuum can still be maintained during use, which is sufficient to reduce a lot of vibration and greatly improve the grip.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing", etc., should be interpreted broadly.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A shock-absorbing device for an electric toothbrush head, comprising a housing (1) and a connecting shaft (2), characterized in that, The connecting shaft (2) is rotatably connected to the side wall of the housing (1); The housing (1) is provided with an adjustment mechanism, which includes a shock-absorbing cavity (3), a fixing ring (4), a drive shaft (5), a cam (6), a fixing plate (7), and an extraction cylinder (8). The shock-absorbing cavity (3) is fixedly connected to the inner side wall of the housing (1), the fixing ring (4) is fixedly connected to the inner side wall of the shock-absorbing cavity (3), the drive shaft (5) is rotatably connected to the side wall of the fixing ring (4), the cam (6) is fixedly connected to the side wall of the drive shaft (5), the fixing plate (7) is fixedly connected to the side wall of the fixing ring (4), and the extraction cylinder (8) is fixedly connected to the side wall of the fixing plate (7).

2. The electric toothbrush head shock absorption device according to claim 1, characterized in that, A sealing plug (9) is slidably connected to the inner wall of the extraction cylinder (8), and a sliding rod (10) is fixedly connected to the side wall of the sealing plug (9). The sliding rod (10) is slidably connected to one side wall of the extraction cylinder (8).

3. The electric toothbrush head shock absorption device according to claim 2, characterized in that, The end of the slide bar (10) away from the sealing plug (9) is fixedly connected to the extrusion plate (11), and the cam (6) is slidably connected to the extrusion plate (11).

4. The electric toothbrush head shock absorption device according to claim 3, characterized in that, A motor (12) is fixedly connected to the side wall of the fixed ring (4). A rotating rod (13) is fixedly connected to the output end of the motor (12). A first adjusting disc (14) is fixedly connected to the outer surface of the rotating rod (13). A second adjusting disc (15) is fixedly connected to the outer surface of the drive shaft (5). A belt (16) is adjusted between the first adjusting disc (14) and the second adjusting disc (15).

5. The electric toothbrush head shock absorption device according to claim 1, characterized in that, An air inlet pipe (17) is fixedly connected between the extraction cylinder (8) and the shock absorption cavity (3), and an air outlet pipe (18) is fixedly connected between the extraction cylinder (8) and the housing (1). Both the air inlet pipe (17) and the air outlet pipe (18) have one-way valves.

6. The electric toothbrush head shock absorption device according to claim 4, characterized in that, An adjusting spring (19) is fixedly connected between the extrusion plate (11) and the extraction cylinder (8). A first gear (20) is fixedly connected to the end of the rotating rod (13) away from the motor (12). A brush rod (21) is rotatably connected to the upper end face of the fixing ring (4). A second gear (22) is fixedly connected to the upper end face of the brush rod (21). The first gear (20) and the second gear (22) are meshed. A first connecting rod (23) is hinged to the upper end face of the second gear (22). A second connecting rod (24) is fixedly connected to the lower end face of the connecting shaft (2). The first connecting rod (23) and the second connecting rod (24) are hinged.

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