Multi-head rotary toothbrush

Abstract

The present invention relates to the technical field of daily supplies, in particular to a multi-head rotary toothbrush. The multi-head rotary toothbrush comprises a toothbrush handle and at least two toothbrush heads. A toothbrush handle cavity is partitioned by a partition plate into a battery cavity and a mounting cavity. A supporting plate and a positioning plate are arranged in the mounting cavity at an interval. Supporting holes are formed on the supporting plate in a penetrating mode, and each supporting hole is rotatably connected to a rotating shaft. A driven gear is mounted at one end of each rotating shaft, and a transmission rod is connected to the other end, close to the positioning plate, of each rotating shaft by means of a universal joint. The end part of each transmission rod penetrates out of the mounting cavity and is correspondingly connected to a detachable toothbrush head. The distance between the transmission rods can be passively adjusted by means of a separation-reset mechanism arranged in the cavity, so that all the toothbrush heads are mutually separated when being pressed by teeth and automatically reset after being away from the teeth. The present invention can use a plurality of independent toothbrush heads to achieve simultaneous brushing and washing for all tooth surfaces or upper and lower teeth, more thorough cleaning, more comfortable holding, gingiva protection, and brushing efficiency improvement.

Description

A multi-head rotating toothbrush Technical Field

[0001] The present invention relates to the technical field of daily necessities, in particular to a multi-head rotating toothbrush. Background Art

[0002] Most existing electric toothbrushes have a single brush handle. Although they can be used for brushing teeth, the brushing time is long and the cleaning effect on teeth is not ideal. In addition, most electric toothbrushes in the existing technology currently use a single brush head structure. This structure cannot clean teeth quickly, efficiently and thoroughly due to the small contact area between the toothbrush and the teeth.

[0003] Therefore, it is necessary to design an electric toothbrush that can improve the teeth cleaning effect, be easy to hold, and reduce the time spent on brushing teeth. Technical issues

[0004] Most existing electric toothbrushes have a single handle. Although they can be used for brushing, they take a long time and have an unsatisfactory cleaning effect. To address the shortcomings of the existing technology, the present invention provides a multi-head rotating toothbrush that can brush both sides of the teeth, multiple sides, or both upper and lower teeth simultaneously. It is not only convenient to hold, but also has a good cleaning effect and improves brushing efficiency. Technical Solutions

[0005] The present invention is achieved through the following technical solutions:

[0006] A multi-head rotating toothbrush is provided, comprising a toothbrush handle and at least two toothbrush heads. The toothbrush handle has a built-in cavity, and the cavity is divided into a battery cavity and an installation cavity by a partition. A battery for power supply is installed in the battery cavity, and a support plate and a positioning plate are arranged at intervals in the installation cavity. The support plate is penetrated by a number of support holes equal to the number of the toothbrush heads, and a rotating shaft is rotatably connected in each support hole. A driven gear is installed at one end of each rotating shaft close to the partition, and a transmission rod is connected to the other end of each rotating shaft close to the positioning plate via a universal joint. The end of each transmission rod passes through the installation cavity and is correspondingly connected to a toothbrush head. The spacing between the transmission rods can be passively adjusted by a separation and reset mechanism arranged in the cavity, so that the toothbrush heads can be separated from each other when squeezed by teeth and automatically reset after being separated from the teeth.

[0007] As an embodiment of the present invention, it is suitable for setting two toothbrush heads, and the separation and reset mechanism includes a fixed shaft arranged on the positioning plate, and an X-shaped hinged expansion arm is installed on the fixed shaft, and the four ends of the expansion arm are respectively connected to slip rings mounted on the transmission rod, and reset springs are respectively connected on both sides of the expansion arm between the two transmission rods.

[0008] The two toothbrush heads are moved on the transmission rod through the expansion arm hinged on the X-axis in conjunction with the movement of the slip ring to change the spacing between the two transmission rods. Combined with the elastic force of the reset spring, the distance between the two toothbrush heads connected by the transmission rod is changed, and under the action of the elastic force, the toothbrush heads are kept close to the surface of the teeth to ensure the cleaning effect.

[0009] As another embodiment of the present invention, it is suitable for setting two, three or more toothbrush heads. The separation and reset mechanism includes a plurality of guide through holes correspondingly opened on the positioning plate for the transmission rod to pass through and to limit and guide the transmission rod. A support rod is fixedly provided at the center of the support plate and the positioning plate, and a reset spring is respectively connected between the support rod and each transmission rod.

[0010] The guide through hole is used to guide and limit the transmission rod. Combined with the elastic force of the reset spring, the toothbrush head and the transmission rod can be separated or approached in the length direction of each guide through hole, which is used to separate or approach the toothbrush head so that it can be close to the tooth surface to achieve efficient cleaning.

[0011] Furthermore, three guide through holes are provided on the positioning plate, and the angle between two adjacent guide through holes is 120°.

[0012] The three guide holes are distributed at 120° in pairs on the positioning plate, so that the toothbrush heads connected to the corresponding three transmission rods are also distributed at 120° in pairs, which can cover the three sides of the teeth and has a beautiful appearance.

[0013] Preferably, the rotation direction of the toothbrush head for brushing the side surfaces of the teeth is from the gums to the tooth tips.

[0014] Furthermore, the toothbrush head includes a brush rod and bristles connected to the circumference of the brush rod, and the brush rod is detachably connected to the transmission rod.

[0015] The toothbrush head consists of a brush rod and circumferential bristles, which are driven by a transmission rod to rotate circumferentially. The rotation of the bristles continuously contacts and rubs against the tooth surface to clean the tooth surface.

[0016] Furthermore, a small motor for driving a driven gear is installed between the partition plate and the support plate in the cavity, and control switches for controlling the opening and closing and the rotation direction of the small motor are respectively installed on both sides of the outer wall of the toothbrush handle.

[0017] By installing a control switch for controlling the small motor on the outer wall of the toothbrush handle, each control switch controls the rotation direction of a small motor. The rotation direction of the small motor can be adjusted at any time according to the need for use, so as to facilitate use. Beneficial effects

[0018] The multiple independent toothbrush heads of the present invention can be driven by a small motor to drive the driven gear to drive the transmission rod to rotate and cooperate with the separation and reset mechanism to maintain close contact with the tooth surface, which not only facilitates the adjustment and reset of the spacing between the toothbrush heads, but also can meet the brushing needs of different tooth parts. When each toothbrush head is squeezed by the teeth, it can adaptively adjust the spacing between each other. When multiple toothbrush heads rotate synchronously, the front and back of the teeth, the upper and lower teeth, and the sides and chewing surfaces of the molars can be brushed at the same time, which has good cleaning efficiency.

[0019] A small motor is used to drive the driven gear, which can control the synchronous rotation of each toothbrush head. The rotation direction of each toothbrush head can also be flexibly controlled as needed, so that the toothbrush bristles can rotate along the gums toward the tips of the teeth at the same time on the inside and outside of the teeth. It is flexible to use. Each toothbrush head can adaptively adjust the distance between each other when squeezed by the teeth. When multiple toothbrush heads rotate synchronously, the front and back of the teeth, the upper and lower teeth, and the sides and chewing surfaces of the molars can be brushed at the same time. This not only makes it convenient to adjust and reset the spacing between the toothbrush heads, but also can meet the brushing needs of different dental parts. It has a good cleaning effect, achieves efficient brushing, is more comfortable to hold, cleans more thoroughly, and protects the gums while brushing faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic cross-sectional view of the structure of embodiment 1 of the present invention.

[0021] FIG2 is an enlarged schematic diagram of point A in FIG1 .

[0022] FIG3 is a schematic cross-sectional view of the toothbrush handle in Example 1 of the present invention.

[0023] FIG4 is a schematic diagram of using the multi-head rotating toothbrush of Example 1 to clean the front and back of teeth simultaneously.

[0024] FIG5 is a schematic diagram of using the multi-head rotating toothbrush of Example 1 to clean the upper and lower rows of teeth.

[0025] FIG6 is a schematic diagram of using the multi-head rotating toothbrush of Example 1 to clean the chewing surface and side surfaces of molars.

[0026] FIG7 is a schematic cross-sectional view of embodiment 2 of the present invention.

[0027] FIG8 is a schematic structural diagram of a positioning plate in Example 2 of the present invention.

[0028] FIG9 is a schematic cross-sectional view of the structure of Example 3 of the present invention.

[0029] FIG10 is a schematic structural diagram of the positioning plate in Example 3.

[0030] FIG11 is a schematic diagram of the connection between the three transmission rods and the support rods in Example 3.

[0031] FIG12 is a schematic diagram of brushing teeth using the multi-head rotating toothbrush of Example 3.

[0032] Shown in the figure: 1. Toothbrush handle, 2. Toothbrush head, 3. Battery cavity, 4. Mounting cavity, 5. Support plate, 6. Positioning plate, 7. Partition, 8. Small motor, 9. Transmission rod, 10. Return spring, 11. Slip ring, 12. Expansion arm, 13. Fixed shaft, 14. Support hole, 15. Teeth, 16. Brush rod, 17. Bristles, 18. Control switch, 19. Driven gear, 20. Rotating shaft, 21. Universal joint, 22. Guide hole, 23. Support rod. Best Mode for Carrying Out the Invention

[0033] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0034] A multi-head rotary toothbrush comprises a toothbrush handle 1 and two toothbrush heads 2. The toothbrush head 2 comprises a brush rod 16 and bristles 17 connected to the brush rod 16 in a circumferential direction. The brush rod 16 is detachably connected to a transmission rod 9.

[0035] As shown in Figure 1, the toothbrush handle 1 has a built-in cavity, and the cavity is divided into a battery cavity 3 and an installation cavity 4 by a partition 7. A battery for power supply is installed in the battery cavity 3, and a support plate 5 and a positioning plate 6 are arranged at intervals in the installation cavity 4. Two support holes 14 are penetrated on the support plate 5, and a rotating shaft 20 is rotatably installed in each support hole 14 through a bearing. A driven gear 19 is installed at one end of each rotating shaft 20 close to the partition 7. A small motor 8 that can drive each driven gear 19 to rotate is provided in the cavity between the partition 7 and the support plate 5. The small motor 8 can be used to drive the two driven gears 19 to rotate synchronously, or two small motors 8 can be provided to drive the two driven gears 19 to rotate respectively. In this way, the rotation direction of each transmission rod 9 and the toothbrush head 2 can be flexibly controlled. In this embodiment, the latter two small motors 8 are used to independently control the rotation direction of the two toothbrush heads 2. The other end of each rotating shaft close to the positioning plate 6 is connected to a transmission rod through a universal joint, and the end of each transmission rod 9 passes through the mounting cavity and is connected to a corresponding toothbrush head 2.

[0036] The separation and reset mechanism includes a fixed shaft 13 provided on the positioning plate 6, and an X-shaped hinged expansion arm 12 is installed on the fixed shaft 13. The four ends of the expansion arm 12 are respectively connected to the slip rings 11 mounted on the transmission rod 9, and reset springs 10 are respectively connected on both sides of the expansion arm 12 between the two transmission rods 9.

[0037] In this embodiment, the two toothbrush heads are designed to rotate flexibly. In order to facilitate the independent control of the direction of the two small motors 8, the rotation direction of the toothbrush head 2 located on the side of the teeth is from the gums to the tooth tips, and the forward and reverse rotations can be adjusted at any time according to needs. The outer wall of the toothbrush handle 1 is installed with a control switch 18 for controlling the rotation direction of each small motor 8.

[0038] Working principle of the present invention:

[0039] As shown in FIG4 , when it is necessary to simultaneously clean the front and back of teeth 15, the toothbrush handle 1 can be gripped, with the two toothbrush heads 2 placed on either side of the teeth. The two small motors 8 of the two toothbrush heads 2 are activated, and the small motors 8 drive the transmission rods 9, which rotate the toothbrush heads 2 360°. This allows for simultaneous cleaning of the front and back of teeth 15 when used with toothpaste. During the brushing process, different teeth have varying thicknesses. In this case, the expansion arms 12, hinged in an X-shape between the transmission rods 9, can deform to adaptively adjust the spacing between the two transmission rods 9. The sliding of the slip ring 11 on the transmission rods 9 allows for the spacing between the two toothbrush heads 2 to be adjusted, allowing for simultaneous cleaning of both sides of the teeth 15.

[0040] At the same time, the upper and lower rows of teeth 15 can also be cleaned at the same time, that is, one toothbrush head 2 is in contact with the upper row of teeth, and the other toothbrush head 2 is in contact with the lower row of teeth, as shown in Figure 5. The control switch 18 on the outer wall of the toothbrush handle 1 is used to control the two toothbrush heads 2 to rotate in opposite directions. The toothbrush handle 1 is held horizontally to brush the teeth, so that the upper and lower rows of teeth can be cleaned at the same time.

[0041] As shown in Figure 6, when it is necessary to clean the rear molars, two toothbrush heads 2 can be used to adjust the contact parts with the molars, one toothbrush head 2 fits the chewing surface of the molars, and the other toothbrush head 2 fits the side of the molars. After starting the small motor 8, the two toothbrush heads 2 are moved manually to clean the chewing surface and side of the molars. Modes for Carrying Out the Invention

[0042] As shown in FIG7 and FIG8 , a multi-head rotary toothbrush includes a toothbrush handle 1 and two toothbrush heads 2 . The toothbrush head 2 includes a brush rod 16 and bristles 17 connected to the brush rod 16 in a circumferential direction. The brush rod 16 is detachably connected to the transmission rod 9 .

[0043] The toothbrush handle 1 has a built-in cavity, and the cavity is divided into a battery cavity 3 and an installation cavity 4 by a partition 7. A battery for power supply is installed in the battery cavity 3, and a support plate 5 and a positioning plate 6 are arranged at intervals in the installation cavity 4. Two support holes are penetrated on the support plate 5, and a rotating shaft 20 is rotatably installed in each support hole through a bearing. A driven gear 19 is installed at one end of each rotating shaft 20 close to the partition 7. A small motor 8 is installed between the support plate 5 and the partition 7 in the cavity. The small motor 8 can be used to drive the driven gear 19 and then drive the transmission rod 9 to rotate, thereby realizing the rotation of each toothbrush head 2. The other end of each rotating shaft close to the positioning plate 6 is connected to a transmission rod 9 through a universal joint 21, and the end of each transmission rod 9 passes through the installation cavity and is correspondingly connected to a toothbrush head 2.

[0044] In this embodiment, a small motor 8 is designed and installed to synchronously drive two driven gears 19.

[0045] The separation and reset mechanism includes two guide through holes 22 correspondingly opened on the positioning plate 6 for the transmission rod 9 to pass through and to limit and guide the transmission rod 9. As shown in Figure 8, the two guide through holes 22 are arranged opposite to each other in the same straight line, and a support rod 23 is fixedly provided at the center of the support plate 5 and the positioning plate 6, and a reset spring 10 is respectively connected between the support rod 23 and the two transmission rods 9.

[0046] The two guide holes 22 are used to guide and limit the transmission rod 9. Combined with the elastic force of the reset spring 10, the toothbrush head 2 and the transmission rod 9 can be separated or approached in the length direction of the two guide holes 22, which is used to separate or approach the toothbrush head 2 so that it can be close to the tooth surface to achieve efficient cleaning.

[0047] When two toothbrush heads 2 are used, the inner and outer sides of the teeth or a single side and the surface of the molars can be brushed at the same time. The rotation direction of the two toothbrush heads 2 on both sides of the teeth is from the gums to the tooth tips. In this embodiment, the two toothbrush heads 2 are designed to flexibly adjust the spacing between them. The two small motors 8 are controlled by the control switch 18 to rotate synchronously. The forward rotation and reverse rotation can be adjusted at any time as needed and can be adjusted according to usage needs.

[0048] As shown in Figures 9-12, a multi-head rotary toothbrush includes a toothbrush handle 1 and three toothbrush heads 2. The toothbrush head 2 includes a brush rod 16 and bristles 17 connected to the brush rod 16 in a circumferential direction. The brush rod 16 is detachably connected to the transmission rod 9.

[0049] The toothbrush handle 1 has a built-in cavity, and the cavity is divided into a battery cavity 3 and an installation cavity 4 by a partition 7. A battery for power supply is installed in the battery cavity 3, and a support plate 5 and a positioning plate 6 are arranged at intervals in the installation cavity 4. Three support holes are opened through the support plate 5, and a rotating shaft 20 is rotatably installed in each support hole through a bearing. A driven gear 19 is installed at one end of each rotating shaft 20 close to the partition 7. A small motor 8 is installed in the cavity between the support plate 5 and the partition 7. The small motor 8 can be used to drive the driven gear 19 and then drive the transmission rod 9 to rotate, thereby realizing the rotation of each toothbrush head 2. The other end of each rotating shaft close to the positioning plate 6 is connected to a transmission rod 9 through a universal joint 21, and the end of each transmission rod 9 passes through the installation cavity and is correspondingly connected to a toothbrush head 2.

[0050] In this embodiment, two small motors 8 are designed and installed, wherein one small motor drives one driven gear alone, and the other small motor is used to synchronously drive the other two driven gears.

[0051] The separation and reset mechanism includes three guide through holes 22 corresponding to the positioning plate 6 for the transmission rod 9 to pass through and to limit and guide the transmission rod 9. A support rod 23 is fixedly arranged at the center of the support plate 5 and the positioning plate 6, and a reset spring 10 is respectively connected between the support rod 23 and the three transmission rods 9.

[0052] The three guide holes 22 are used to guide and limit the transmission rod 9. Combined with the elastic force of the reset spring 10, the toothbrush head 2 and the transmission rod 9 can be separated or approached in the length direction of the three guide holes 22, which is used to separate or approach the toothbrush head 2 so that it can be close to the tooth surface to achieve efficient cleaning.

[0053] The angle between two adjacent guide holes 22 is 120°, and the three guide holes 22 are distributed on the positioning plate 6 at an angle of 120°, so that the toothbrush heads 2 connected to the corresponding three transmission rods 9 are also distributed at an angle of 120°, which can achieve wrapping coverage of three sides of the teeth and has a beautiful shape.

[0054] When using three toothbrush heads 2, the inner and outer sides of the teeth and the molar surfaces can be brushed simultaneously. The two toothbrush heads 2 located on the sides of the teeth rotate from the gums to the tooth tips, while the toothbrush head located on the molar surface can rotate in a different direction. This eliminates the need for wrist rotation when brushing, and allows for complete tooth cleaning using a single gripping posture, improving brushing efficiency and providing a more thorough and quicker cleaning. In this embodiment, the three toothbrush heads 2 are designed to rotate flexibly. To facilitate the independent control of the direction of the two small motors 8 and to adjust the forward and reverse rotation as needed, control switches 18 for controlling the on / off and rotation direction of each small motor 8 are mounted on both sides of the outer wall of the toothbrush handle 1.

[0055] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by adopting existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical solutions of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A multi-head rotating toothbrush comprising a toothbrush handle and at least two toothbrush heads, characterized in that: The toothbrush handle has a built-in cavity, which is divided into a battery cavity and an installation cavity by a partition. A battery for power supply is installed in the battery cavity, and a support plate and a positioning plate are arranged at intervals in the installation cavity. The support plate is penetrated by support holes with the same number as the toothbrush heads, and a rotating shaft is rotatably connected in each support hole. A driven gear is installed at one end of each rotating shaft close to the partition, and a transmission rod is connected to the other end of each rotating shaft close to the positioning plate through a universal joint. The end of each transmission rod passes through the installation cavity and is connected to a corresponding toothbrush head. The spacing between the transmission rods can be passively adjusted by a separation and reset mechanism arranged in the cavity, so that the toothbrush heads can separate from each other when squeezed by the teeth and automatically reset after being separated from the teeth.

2. The multi-head rotating toothbrush according to claim 1, characterized in that: The separation and reset mechanism includes a fixed shaft arranged on the positioning plate, on which an X-shaped hinged expansion arm is installed. The four ends of the expansion arm are respectively connected to slip rings sleeved on the transmission rod, and reset springs are respectively connected on both sides of the expansion arm between each transmission rod.

3. The multi-head rotating toothbrush according to claim 1, wherein: The separation and reset mechanism includes a plurality of guide holes correspondingly provided on the positioning plate for the transmission rod to pass through and to limit and guide the transmission rod. A support rod is fixedly provided at the center of the support plate and the positioning plate, and a reset spring is respectively connected between the support rod and each transmission rod.

4. The multi-head rotating toothbrush according to claim 1, wherein: The rotation direction of the toothbrush head that brushes the sides of the teeth is from the gums to the tooth tips.

5. The multi-head rotating toothbrush according to claim 1 or 4, characterized in that: The toothbrush head comprises a brush rod and bristles connected to the circumference of the brush rod, and the brush rod is detachably connected to the transmission rod.

6. The multi-head rotating toothbrush according to claim 1, wherein: A small motor for driving a driven gear is installed between the partition plate and the support plate in the cavity, and a control switch for controlling the opening and closing and the rotation direction of the small motor is installed on the outer wall of the toothbrush handle.

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