CN220275754U - Improved double-head electric toothbrush - Google Patents

Abstract

The utility model discloses an improved double-head electric toothbrush which comprises a brush head part and a brush handle part, wherein two brush heads are arranged on the brush head part in parallel and rotatably, the brush heads are respectively a first brush head close to the brush handle part and a second brush head far away from the brush handle part, the two brush heads are in linkage fit through a first tooth trace and a second tooth trace which are arranged on opposite sides, a battery, a circuit board and a motor are arranged in the brush handle part, an output shaft of the motor directly or indirectly drives the first brush head to reciprocate through a connecting rod, a transmission block with a containing groove is arranged on the first brush head, a transmission rod is eccentrically arranged on the end face of the connecting rod close to the first brush head, the transmission rod is positioned in the containing groove, the transmission rod is provided with a spherical transmission head, and the transmission head is in butt joint with two side faces of the containing groove. The brush head driving device is reasonable in structural design, and the driving rod is eccentrically arranged on the connecting rod and matched with the driving block, so that the brush head is driven, the driving gap is small, and the driving is more stable.

Description

Improved double-head electric toothbrush

Technical Field

The utility model relates to the technical field of toothbrushes, in particular to an improved double-head electric toothbrush.

Background

The applicant's prior application CN211325783U discloses a double-end electric toothbrush, the toothbrush head is including base and two brush heads of setting up side by side on the base, and two brush heads are all rotatable setting on the base, and wherein the brush head that is close to toothbrush handle one side is first brush head, and another brush head is the second brush head, is provided with the insection on the opposite side of two brush heads respectively, and two insections mesh respectively and realize the linkage cooperation between two brush heads, realize first brush head reciprocating rotation through connecting rod transmission between the output shaft of motor and the first brush head. By adopting the scheme, the utility model overcomes the problems in the prior art and provides the novel double-head electric toothbrush which is provided with two brush heads and can vibrate or rotate.

However, the applicant found that the problem of uneven transmission and loud noise exists between the output shaft of the motor and the first brush head through the link transmission in the above scheme, so that further improvement on the prior art is needed.

Disclosure of Invention

The utility model overcomes the defects of the prior art, and provides an improved double-head electric toothbrush, wherein the transmission rod is eccentrically arranged on the connecting rod and matched with the transmission block, so that the brush head is driven, the transmission gap is small, and the transmission is more stable.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides an improved double-end electric toothbrush, including brush head and brush stalk portion, be provided with two brush heads on the brush head side by side and rotationally, be respectively for the first brush head that is close to the brush stalk portion and the second brush head that is kept away from the brush stalk portion, two brush heads realize the linkage cooperation through locating the first insection and the second insection of opposite side, be equipped with battery in the brush stalk portion, circuit board and motor, the output shaft of motor directly or indirectly drives first brush head through the connecting rod and reciprocate, first brush head drives the second brush head through the cooperation of two insections and reciprocate in opposite direction synchronously, be equipped with the drive block that has the accommodation groove on the first brush head, the connecting rod is close to the terminal surface of first brush head and is equipped with the transfer line eccentrically, the transfer line is arranged in the accommodation groove, the transfer line has spheroidal drive head, drive head and the both sides face butt of accommodation groove.

Preferably, the output shaft of the motor is indirectly connected with the connecting rod, a transmission shaft is arranged between the output shaft of the motor and the connecting rod, the transmission shaft is in splicing linkage fit with the connecting rod, a plurality of inserting columns are arranged on the transmission shaft at intervals, and slots matched with the inserting columns are formed in the connecting rod.

Preferably, the first brush head and the second brush head are both rotatably arranged on the brush head through a central shaft, and a cap edge part for preventing the two brush heads from separating from the brush head is arranged at the end part of the central shaft.

Preferably, one side of the inserted post facing the slot is in arc transition, and the bottom surface of the slot matched with the inserted post is also in arc transition.

Preferably, a reduction gear set is connected between the output shaft of the motor and the transmission shaft.

The utility model has the beneficial effects that: the brush head driving device is reasonable in structural design, and the driving rod is eccentrically arranged on the connecting rod and matched with the driving block, so that the brush head is driven, the driving gap is small, and the driving is more stable.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic diagram of the internal structure of an embodiment of the present utility model;

FIG. 3 is a schematic view showing a connection structure of a first brush head and a second brush head according to an embodiment of the present utility model;

FIG. 4 is a schematic view showing the structure of a cap rim portion reflecting a central axis according to an embodiment of the present utility model;

FIG. 5 is an enlarged view of FIG. 2 at A;

FIG. 6 is a schematic view showing a partial structure of a connecting rod according to an embodiment of the present utility model;

fig. 7 is a schematic structural view of a transmission shaft according to an embodiment of the present utility model.

In the figure: 1. a brush head; 11. a central shaft; 12. a cap rim portion; 2. a brush handle; 3. a first brush head; 31. a transmission block; 32. a receiving groove; 33. a first insection; 34. a second insection; 4. a second brush head; 5. a battery; 6. a circuit board; 7. a motor; 8. a connecting rod; 81. a transmission rod; 82. a drive head; 83. a slot; 9. a transmission shaft; 91. inserting a column; 10. a reduction gear set.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-7, an improved double-head electric toothbrush comprises a brush head part 1 and a brush handle part 2, wherein two brush heads are arranged on the brush head part 1 in parallel and rotationally, namely a first brush head 3 close to the brush handle part 2 and a second brush head 4 far away from the brush handle part 2, the two brush heads are in linkage fit through a first tooth line 33 and a second tooth line 34 which are arranged on opposite sides, a battery 5, a circuit board 6 and a motor 7 are arranged in the brush handle part 2, an output shaft of the motor 7 directly or indirectly drives the first brush head 3 to reciprocate through a connecting rod 8, the first brush head 3 drives the second brush head 4 to synchronously reciprocate in opposite directions through the fit of the two tooth lines, a transmission block 31 with a containing groove 32 is arranged on the first brush head 3, a transmission rod 81 is eccentrically arranged on the end surface of the connecting rod 8 close to the first brush head 3, the transmission rod 81 is positioned in the containing groove 32, the transmission rod 81 is provided with a spherical transmission head 82, and the transmission head 82 is abutted against two side surfaces of the containing groove 32; the output shaft of the motor 7 is indirectly connected with the connecting rod 8, a transmission shaft 9 is arranged between the output shaft of the motor 7 and the connecting rod 8, the transmission shaft 9 is in splicing linkage with the connecting rod 8, a plurality of inserting columns 91 are arranged on the transmission shaft 9 at intervals, and slots 83 matched with the inserting columns 91 are arranged on the connecting rod 8; the first brush head 3 and the second brush head 4 are rotatably arranged on the brush head 1 through a central shaft 11, and a cap edge part 12 for preventing the two brush heads from separating from the brush head 1 is arranged at the end part of the central shaft 11; the side of the inserted post 91 facing the slot 83 is in arc transition, and the bottom surface of the slot 83 matched with the inserted post 91 is also in arc transition; a reduction gear set 10 is connected between the output shaft of the motor 7 and the transmission shaft 9.

Through adopting the technical scheme, in the utility model, the motor 7 works, the transmission shaft 9 is driven to rotate through the reduction gear set 10, the rotating shaft is in inserted linkage with the connecting rod 8, the connecting rod 8 is driven to rotate, the eccentrically arranged transmission rod 81 is rotated, the first brush head 3 is enabled to rotate reciprocally, and the first brush head 3 drives the second brush head 4 to rotate reciprocally through the cooperation of the two insections 33, so that the linkage of the two brush heads is realized. Wherein, through set up the transmission head 82 with holding groove 32 both sides face butt at the tip of transfer line 81, so effectively reduce the transmission clearance, the transmission is more steady, noise when reducing the transmission. And set up the inserted post 91 as arc transition towards the one side of slot 83, slot 83 and inserted post 91 complex bottom surface also be arc transition, also make the connection between two parts more steady to make the transmission more smooth and easy. Wherein the diameter of the cap rim 12 is larger than the diameter of the hole for mounting the central shaft 11, so that the central shaft 11 can be well fixed on the brush head 1, thereby preventing the two brush heads from being separated from the brush head 1, wherein the central shaft 11 can be fixed on the brush head 1 or the brush head.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (6)

1. The utility model provides an improved double-end electric toothbrush, including brush head (1) and brush holder portion (2), be provided with two brush heads on brush head (1) side by side and rotationally, be respectively for first brush head (3) that are close to brush handle portion (2) and keep away from second brush head (4) of brush handle portion (2), two brush heads realize the linkage cooperation through first insection (33) and second insection (34) that locate opposite side, be equipped with battery (5) in brush handle portion (2), circuit board (6) and motor (7), the output shaft of motor (7) directly or indirectly through connecting rod (8) drive first brush head (3) reciprocating motion, first brush head (3) drive second brush head (4) synchronous reciprocating motion in opposite direction through the cooperation of first insection (33) and second insection (34), characterized in that, be equipped with on first brush head (3) drive piece (31) that have accommodation groove (32), connecting rod (8) are close to the terminal surface of first brush head (3) and are equipped with drive rod (81) eccentric, be arranged in accommodation groove (81).

2. An improved double-ended electric toothbrush according to claim 1, characterized in that the drive rod (81) has a spherical drive head (82), the drive head (82) being in abutment with both sides of the receiving recess (32).

3. An improved double-ended electric toothbrush according to claim 1 or 2, characterized in that the output shaft of the motor (7) is indirectly connected with the connecting rod (8), a transmission shaft (9) is arranged between the output shaft of the motor (7) and the connecting rod (8), the transmission shaft (9) is in inserted linkage with the connecting rod (8), a plurality of inserting posts (91) are arranged on the transmission shaft (9) at intervals, and slots (83) matched with the inserting posts (91) are arranged on the connecting rod (8).

4. An improved double-ended electric toothbrush according to claim 3, characterized in that the first brush head (3) and the second brush head (4) are both rotatably arranged to the brush head (1) by means of a central shaft (11), the end of the central shaft (11) being provided with a cap rim (12) preventing both brush heads from being separated from the brush head (1).

5. The improved double-ended electric toothbrush of claim 4 wherein the side of the post (91) facing the slot (83) is curved and the bottom surface of the slot (83) mating with the post (91) is also curved.

6. An improved double-ended electric toothbrush according to claim 5, characterized in that a reduction gear set (10) is connected between the output shaft of the motor (7) and the drive shaft (9).