Rotary electric toothbrush

Abstract

The utility model discloses a rotary electric toothbrush which comprises a toothbrush handle and a toothbrush head, the toothbrush head comprises a toothbrush head shell, a bristle planting mounting seat and a push rod channel, a bristle planting assembly is rotatably connected in the bristle planting mounting seat, a driving mechanism is arranged in the toothbrush handle, the driving mechanism comprises a driving rod, and the driving rod is connected with the toothbrush head shell. The driving rod penetrates through the end face of the upper end of the toothbrush handle and the push rod channel and then is in driving connection with the bristle planting assembly, the driving rod comprises a fixed push rod connected with the driving mechanism and a movable push rod connected with the bristle planting assembly, and the fixed push rod and the movable push rod are in clearance connection through a clamping mechanism. The driving rod is formed by split combination of the fixed push rod and the movable push rod, and clearance connection is realized through the clamping mechanism, so that the driving rod can realize self-adaptive movement direction adjustment through flexible connection of the clamping mechanism in the working process, the phenomenon that the toothbrush is stuck in the use process is prevented, and the use experience of a user is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of electric toothbrush technology, specifically a rotary electric toothbrush. Background Technology

[0002] There are two types of electric toothbrushes: one type uses a motor to drive the brush head to swing back and forth to brush teeth, and the other type uses a motor to drive the bristle assembly on the brush head to rotate to brush teeth.

[0003] Existing electric toothbrushes that use a drive motor to rotate the bristle assembly have an unreasonable structural design, which may cause them to jam or the bristle assembly to rotate erratically during use, seriously affecting the user's brushing experience. Utility Model Content

[0004] The purpose of this utility model is to provide a rotary electric toothbrush, in which the drive rod is formed by the separate combination of a fixed push rod and a movable push rod, and is connected by a snap-fit ​​mechanism. This allows the drive rod to adaptively adjust its movement direction during operation by utilizing the flexible connection of the snap-fit ​​mechanism, thus preventing the toothbrush from getting stuck during use and solving the problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rotary electric toothbrush, comprising a toothbrush handle and a toothbrush head detachably connected to the upper end of the toothbrush handle. The toothbrush head includes a brush head shell, a bristle mounting base disposed at one end of the brush head shell, and a push rod channel extending axially along the brush head shell. A bristle mounting assembly is rotatably connected within the bristle mounting base. A drive mechanism is disposed within the toothbrush handle. The drive mechanism includes a drive rod, which passes through the upper end face of the toothbrush handle and the push rod channel and is drivenly connected to the bristle mounting assembly. The drive rod includes a fixed push rod connected to the drive mechanism and a movable push rod connected to the bristle mounting assembly. The fixed push rod and the movable push rod are gap-connected by a snap-fit ​​mechanism.

[0006] Preferably, the locking mechanism includes a swing locking seat and a swing locking connector. The swing locking seat is a tubular body with through holes symmetrically arranged on both sides of the tubular body. The swing locking connector is a flat arrowhead body. When the swing locking connector is connected to the swing locking seat, the protrusions on both sides of the flat arrowhead body are respectively locked into the through holes. The movable push rod can swing relative to the fixed push rod with the line connecting the protrusions on both sides of the flat arrowhead body as the axis.

[0007] Preferably, the tufting assembly has a tufting shaft facing the tufting mounting base, and the tufting mounting base is provided with a bearing. The tufting assembly is rotatably connected to the tufting mounting base through the cooperation of the tufting shaft and the bearing.

[0008] Preferably, a push rod pivot is provided on the hair-planting assembly at a position off the central axis, and a pawl is provided on the end of the movable push rod facing the hair-planting assembly. The pawl is offset from the axis of the movable push rod, and the movable push rod is rotatably connected to the push rod pivot through the cooperation of the pawl and the push rod pivot.

[0009] Preferably, a rotation limiting rod is fixed on the tufting mounting base, and a rotation limiting groove is provided on the tufting assembly. The rotation limiting rod is inserted into the rotation limiting groove and is slidably connected to the rotation limiting groove.

[0010] Preferably, a return spring is circumferentially sleeved on the drive rod, with the upper end of the return spring being limited and connected to the inner wall of the push rod channel, and the lower end being limited and connected to the drive rod.

[0011] Preferably, the drive mechanism includes a drive motor, a drive gear connected to the output shaft of the drive motor, an eccentric gear plate meshing with the drive gear, a rod seat slidably connected to the eccentric shaft of the eccentric gear plate, and a drive rod fixedly connected to the rod seat.

[0012] Preferably, the toothbrush handle includes a handle housing and a port cover located at the bottom of the handle housing. An electrical bracket is disposed inside the handle housing, and a drive mechanism, a battery, and a circuit board assembly are mounted on the electrical bracket. The drive mechanism and the battery are electrically connected to the circuit board assembly. The circuit board assembly is electrically connected to a control button and a power interface. The control button is disposed in a pre-set through hole in the handle housing, and the power interface is disposed in a pre-set through hole in the port cover. A light-emitting LED is encapsulated on the circuit board assembly, and a light guide is sandwiched between the circuit board assembly and the handle housing. A portion of the light guide is embedded in a pre-set light-emitting through hole in the handle housing, and the light emitted by the LED is emitted outward from the light-emitting through hole through the light guide.

[0013] Preferably, the drive rod and the toothbrush handle housing are connected in a water-tight manner through a waterproof kit.

[0014] Preferably, the lower end of the toothbrush head is fitted with a brush head connector, and the upper end of the toothbrush handle is provided with a handle connector. The toothbrush head is detachably connected to the toothbrush handle through the snap-fit ​​between the brush head connector and the handle connector.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] In this invention, the drive rod is formed by the separate combination of a fixed push rod and a movable push rod, and is connected by a snap-fit ​​mechanism. This allows the drive rod to adaptively adjust its movement direction during operation by utilizing the flexible connection of the snap-fit ​​mechanism, preventing the toothbrush from getting stuck during use and effectively improving the user experience. Attached Figure Description

[0017] Figure 1 Explosion of the structure of this utility model Figure 1 ;

[0018] Figure 2 Explosion of the structure of this utility model Figure 2 ;

[0019] Figure 3 This is a perspective view of the appearance of this utility model;

[0020] Figure 4 This is a schematic diagram of the AA cross-section orientation of this utility model;

[0021] Figure 5 This is a cross-sectional view of the present invention.

[0022] In the diagram: 1. Toothbrush head; 11. Brush head housing; 12. Bristle mounting base; 121. Bearing; 122. Rotation limit rod; 13. Bristle assembly; 131. Bristle shaft; 132. Push rod shaft; 133. Rotation limit groove; 14. Brush head connector; 2. Toothbrush handle; 21. Handle housing; 211. Handle connector; 22. Port cover; 23. Electrical bracket; 24. Light guide; 25. Circuit board assembly; 251. Control button; 252. Power interface; 253. LED; 26. Drive mechanism; 261. Drive motor; 262. Drive gear; 263. Eccentric gear plate; 264. Rod seat; 265. Drive rod; 2651. Fixed push rod; 2652. Movable push rod; 2653. Swing connector; 2654. Swing connector base; 2655. Shaft claw; 27. Battery; 28. Waterproof kit. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5A rotary electric toothbrush includes a toothbrush handle 2 and a toothbrush head 1 detachably connected to the upper end of the toothbrush handle 2. The toothbrush head 1 includes a brush head shell 11, a bristle mounting base 12 disposed at one end of the brush head shell 11, and a push rod channel extending axially along the brush head shell 11. A bristle assembly 13 is rotatably connected within the bristle mounting base 12. A drive mechanism 26 is disposed within the toothbrush handle 2. The drive mechanism 26 includes a drive rod 265, which passes through the upper end face of the toothbrush handle 2 and the push rod channel and is drivenly connected to the bristle assembly 13. The drive rod 265 includes a fixed push rod 2651 connected to the drive mechanism 26 and a push rod 2651 connected to the bristle assembly. The movable push rod 2652 is connected to the fixed push rod 2651 via a locking mechanism. The locking mechanism includes a swing locking seat 2654 and a swing locking connector 2653. The swing locking seat 2654 is a tubular body with through holes symmetrically arranged on both sides of the tubular body. The swing locking connector 2653 is a flat arrowhead. When the swing locking connector 2653 is connected to the swing locking seat 2654, the protrusions on both sides of the flat arrowhead are respectively locked into the through holes. The movable push rod 2652 can swing relative to the fixed push rod 2651 with the line connecting the protrusions on both sides of the flat arrowhead as the axis.

[0025] The tufting assembly 13 has a tufting shaft 131 facing the tufting mounting base 12. A bearing 121 is installed inside the tufting mounting base 12. The tufting assembly 13 is rotatably connected to the tufting mounting base 12 via the cooperation of the tufting shaft 131 and the bearing 121. A push rod shaft 132 is located off-center from the central axis of the tufting assembly 13. A pawl 2655 is provided at one end of the movable push rod 2652 facing the tufting assembly 13. The pawl 2655 is offset from the axis of the movable push rod 2652. The movable push rod 2652 is rotatably connected to the push rod shaft 132 via the cooperation of the pawl 2655. A rotation limit rod 122 is fixed on the tufting mounting base 12. A rotation limit groove 133 is provided on the tufting assembly 13. The rotation limit rod 122 is inserted into the rotation limit groove 133 and slidably connected to it. A return spring 266 is circumferentially sleeved on the drive rod 265. The upper end of the return spring 266 is limitedly connected to the inner wall of the push rod channel, and the lower end is limitedly connected to the drive rod 265. The drive mechanism 26 includes a drive motor 261, a drive gear 262 connected to the output shaft of the drive motor, an eccentric gear disk 263 meshing with the drive gear 262, a rod seat 264 slidably connected to the eccentric shaft of the eccentric gear disk 263, and a drive rod 265 fixedly connected to the rod seat 264. When the drive motor 261 is working, it drives the drive gear 262 to rotate, thereby driving the eccentric gear disk 263 to rotate. The rod seat 264 moves up and down and back under the drive of the eccentric gear disk 263, thereby driving the drive rod 265 to move down and back. At this time, the tufting assembly 13 reciprocates within the limited range of the rotation limiting groove 133 and the rotation limiting rod 122.

[0026] The toothbrush handle 2 includes a handle housing 21 and a port cover 22 covering the bottom of the handle housing 21. An electrical support 23 is disposed inside the handle housing 21. A drive mechanism 26, a battery 27, and a circuit board assembly 25 are mounted on the electrical support 23. The drive mechanism 26 and the battery 27 are electrically connected to the circuit board assembly 25. The circuit board assembly 25 is electrically connected to a control button 251 and a power interface 252. The control button 251 is located in a pre-set through hole in the handle housing 21 and is used to control the operating mode of the drive motor 261. The power interface... The port 252 is located in a pre-set through hole in the port cover 22. When the power interface 252 is connected to an external power supply using a charging cable, it can charge the battery 27. The circuit board assembly 25 is encapsulated with light-emitting LED beads 253. A light guide 24 is sandwiched between the circuit board assembly 25 and the handle housing 21. Part of the light guide 24 is embedded in a pre-set light-emitting through hole in the handle housing 21. The light emitted by the light-emitting LED beads 253 is emitted outward from the light-emitting through hole through the light guide 24. The light-emitting LED beads 253 use different light-emitting modes to show the user the real-time working status and working mode of the electric toothbrush.

[0027] The drive rod 265 and the toothbrush handle housing are connected in a water-tight manner through a waterproof kit 28. The waterproof kit 28 includes a silicone sleeve and a fastening spring ring. One end of the silicone sleeve is clamped between the electrical bracket 23 and the handle housing 21, and the other end is fastened to the drive rod 265 around its circumference through the fastening spring ring, thereby achieving a water-tight effect and preventing water from the outside of the toothbrush handle 2 from seeping into the toothbrush handle 2 and wetting the electrical components inside the handle housing 21.

[0028] The lower end of the toothbrush head 1 is fitted with a brush head connector 14, and the upper end of the toothbrush handle 2 is provided with a handle connector 211. The brush head connector 14 is fixedly connected to the toothbrush head 1. A concave hole is provided on the inner wall of the brush head connector 14, and a convex key is provided on the outer wall of the handle connector 211 corresponding to the concave hole. When the toothbrush head 1 is connected to the toothbrush handle 2, the concave hole and the convex key are snapped together. The toothbrush head 1 is detachably connected to the toothbrush handle 2 through the snap-fit ​​between the brush head connector 14 and the handle connector 211.

[0029] In summary, the drive rod 265 of this utility model is formed by the separate combination of a fixed push rod 2651 and a movable push rod 2652, and is connected by a snap-fit ​​mechanism. This allows the drive rod 265 to adaptively adjust its movement position during operation by utilizing the flexible connection of the snap-fit ​​mechanism, preventing the toothbrush from getting stuck during use and effectively improving the user experience.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary electric toothbrush, comprising a toothbrush handle (2) and a toothbrush head (1) detachably connected to the upper end of the toothbrush handle (2), the toothbrush head (1) comprising a brush head shell (11), a bristle mounting base (12) disposed at one end of the brush head shell (11), and a push rod channel extending axially along the brush head shell (11), wherein a bristle mounting assembly (13) is rotatably connected within the bristle mounting base (12), and a drive mechanism (26) is disposed within the toothbrush handle (2), the drive mechanism (26) comprising a drive rod (265), the drive rod (265) passing through the upper end face of the toothbrush handle (2) and the push rod channel and being drivenly connected to the bristle mounting assembly (13), characterized in that: The driving rod (265) comprises a fixed push rod (2651) connected with the driving mechanism (26) and a movable push rod (2652) connected with the bristle assembling component, and clearance connection is realized between the fixed push rod (2651) and the movable push rod (2652) through a clamping mechanism.

2. A rotary electric toothbrush according to claim 1, wherein: The clamping mechanism comprises a swing clamping seat (2654) and a swing clamping head (2653), the swing clamping seat (2654) is a tubular body, symmetrical through-hole penetrating the wall surface is arranged on the two opposite sides of the tubular body, the swing clamping head (2653) is a flat arrow body, when the swing clamping head (2653) is connected with the swing clamping seat (2654), the protrusions on the two sides of the flat arrow body are clamped in the through-holes respectively, and the movable push rod (2652) can swing relative to the fixed push rod (2651) with the protrusions on the two sides of the flat arrow body as the axis.

3. The rotary electric toothbrush according to claim 1, wherein: The bristle assembling component (13) is provided with a bristle rotating shaft (131) on one side of the bristle mounting base (12), the bristle mounting base (12) is provided with a bearing (121), and the bristle assembling component (13) is rotatably connected to the bristle mounting base (12) through cooperation of the bristle rotating shaft (131) and the bearing (121).

4. The rotary electric toothbrush according to claim 1, wherein: The bristle assembling component (13) is provided with a push rod rotating shaft (132) at a position deviating from the central axis, one end of the movable push rod (2652) is provided with a shaft claw (2655), the shaft claw (2655) is arranged to deviate from the axis of the movable push rod (2652), and the movable push rod (2652) is rotatably connected with the push rod rotating shaft (132) through the shaft claw (2655).

5. The rotary electric toothbrush of claim 1 wherein: The bristle mounting base (12) is fixedly provided with a rotating limiting rod (122), and the bristle assembling component (13) is provided with a rotating limiting groove (133), the rotating limiting rod (122) is inserted into the rotating limiting groove (133) and is in sliding connection with the rotating limiting groove (133).

6. The rotary electric toothbrush of claim 1 wherein: The driving rod (265) is circumferentially sleeved with a reset spring (266), the upper end of the reset spring (266) is in limiting connection with the inner wall surface of the push rod channel, and the lower end of the reset spring (266) is in limiting connection with the driving rod (265).

7. The rotary electric toothbrush of claim 1 wherein: The driving mechanism (26) comprises a driving motor (261), a driving gear (262) connected to the output shaft of the driving motor, an eccentric tooth disc (263) in meshing connection with the driving gear (262), a rod seat (264) in sliding connection with the eccentric shaft of the eccentric tooth disc (263), and a driving rod (265) in fixed connection with the rod seat (264).

8. The rotary electric toothbrush of claim 1 wherein: The toothbrush handle (2) comprises a handle shell (21) and a port cover (22) arranged at the bottom end of the handle shell (21), an electric appliance support (23) is arranged in the handle shell (21), a driving mechanism (26), a battery (27) and a circuit board assembly (25) are arranged on the electric appliance support (23), the driving mechanism (26) and the battery (27) are electrically connected with the circuit board assembly (25), the circuit board assembly (25) is electrically connected with a control button (251) and a power supply interface (252), the control button (251) is arranged in a preset through hole of the handle shell (21), the power supply interface (252) is arranged in a preset through hole of the port cover (22), a light emitting lamp bead (253) is packaged on the circuit board assembly (25), and a light guide piece (24) is arranged between the circuit board assembly (25) and the handle shell (21), part of the body of the light guide piece (24) is embedded in a preset light emitting through hole of the handle shell (21), and the light emitted by the light emitting lamp bead (253) is emitted outward from the light emitting through hole through the light guide piece (24).

9. The rotary electric toothbrush of claim 1 wherein: The driving rod (265) and the toothbrush handle shell are water-tightly connected through the waterproof sleeve (28).

10. The rotary electric toothbrush of claim 1 wherein: The toothbrush head (1) is sleeved with a brush head connecting piece (14) at the lower end, the toothbrush handle (2) is provided with a handle connecting bolt (211) at the upper end, and the toothbrush head (1) is detachably connected with the toothbrush handle (2) through the buckle cooperation of the brush head connecting piece (14) and the handle connecting bolt (211).

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