CN2555802Y

CN2555802Y - One-way cam driven electric toothbrush

Info

Publication number: CN2555802Y
Application number: CN 02272409
Authority: CN
Inventors: 朱伟静; 陈谭余
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-08-07
Filing date: 2002-08-07
Publication date: 2003-06-18
Anticipated expiration: 2012-08-07

Abstract

The utility model relates to a unidirectional cam-drive electric toothbrush, which comprises a handle shell, batteries, a motor, a brushing head, and a transmission unit. The utility model is characterized by adopting a ratchet self-locked switch and a unidirectional cam transmission unit. The transmission consists of a cam shaft, a unidirectional cam, a brush pole axis, and a return spring. The unidirectional cam is arranged between the end of the brushing pole axis and the cam shaft. Under the action of the return spring, the bus line of the unidirectional cam is always jointed to the level pillar of the cam axis. With electricity supplied, the rotation of motor is transformed into to-and-fro movement of the brushing pole axis through the unidirectional cam transmission unit, and is eventually transformed into sway of hair base. While being skillfully and compactly structured, with high transmission efficiency, little noise, flexible switch, automatic reset, and convenient operation, the utility model has a long service life.

Description

The electric toothbrush of unidirectional cam drive

Technical field

This utility model relates to electric toothbrush, specifically is a kind of electric toothbrush of adopting ratchet self-lock switch and unidirectional cam drive.

Background technology

In the design of electric toothbrush, adopt the switch and the kind of drive of which kind of pattern, both satisfied various Essential Performance Requirements, reach again and make in appearance and modeling, simplified manufacturing technique and reduce the purpose of manufacturing cost is the key point of design.

With regard at present common electric toothbrush, its switch adopts spring-piece type or trigger-type mostly, this switch of two types all exists life-span weak point, poor reliability and defect rate high shortcoming, especially touch switch more to increase manufacturing cost because electronic circuit is complicated.

Its kind of drive has two kinds of typical structures: a kind of is moving by will the rotatablely move string back and forth that converts the brush holder support axle to of gear and eccentric; Another kind is that the string back and forth that utilizes the two-way transmission of cam to rotatablely move to convert the brush holder support axle to is moving.The common drawback that this two kind of drive exists is: part manufacturing and assembly precision require high, and noise is big when cost height, use, electric current is big, and volume is bigger in addition, is inconvenient to use the optimal design with appearance and modeling.

Summary of the invention

In view of the above shortcomings of existing electric toothbrush, this utility model provides a kind of electric toothbrush of adopting ratchet self-lock switch and unidirectional cam drive, relies on the unidirectional transmission of cam just can will rotatablely move and converts the reciprocating motion of brush holder support axle to.

The electric toothbrush of this unidirectional cam drive comprises: handle casing, be installed in battery, motor and switch in the handle casing, and head portion and drive mechanism is characterized in that: described switch is the ratchet self-lock switch;

Described drive mechanism adopts unidirectional cam drive structure, it is made up of camshaft 13, unidirectional cam 14, brush holder support axle 15 and return spring 16 that motor drives, brush holder support axle 15 latter ends that are positioned at brush holder support 17 are with return spring 16, unidirectional cam 14 is arranged between brush holder support axle 15 ends and the camshaft 13, under the effect of return spring 16, the bus of unidirectional cam 14 fits on the transverse post of camshaft 13 all the time.Press ratchet self-lock switch energized, the brush holder support axle reciprocating motion that motor rotatablely moves and converts to by unidirectional cam drive structure finally converts the swing of pieces seat 18 to.

This utility model adopts ratchet self-lock switch and unidirectional cam drive structure, is skillfully constructed, and the contact resistance of ratchet self-lock switch contact is little, and energy loss is few, and switch is flexible, resets certainly, and is easy to use, and the life-span is long.

By unidirectional cam drive motor being rotatablely moved converts the brush holder support axle to and moves back and forth, and finally converts the swing of pieces seat to, compact conformation, and the transmission efficiency height, noise is little.It is less demanding that part is made assembly precision, and selection range is wide, helps the reduction of cost.

Description of drawings

Fig. 1 and Fig. 3 are overall structure sketch map of the present utility model;

Fig. 2 is the cam curve expanded view of its unidirectional cam;

Fig. 4 and Fig. 5 are its ratchet self-lock switch structural representation;

Fig. 6 is arranged on the interior enforcement illustration of brush holder support for its unidirectional cam drive structure.

The specific embodiment

Below in conjunction with accompanying drawing structure of the present utility model and operation principle are further described.Each several part is shown in the accompanying drawing: battery cathode spring 1, battery 2, lead 3, ratchet shell fragment 4, ratchet 5, ratchet electrode slice 6, motor electrode slice 7, switch lever 8, motor 9, switch cushion 10, handle casing 11, ratchet shaft 12, camshaft 13, cam 14, brush holder support axle 15, return spring 16, brush holder support 17, pieces seat 18, pieces seat eccentric shaft 19, pieces seat central shaft 20.

As Fig. 1, shown in Figure 3, its unidirectional cam drive structure is arranged in the handle.The sketch map that is at the highest notch for cam 14 its buses of Fig. 3 wherein, Fig. 5 is that the bus of its cam 14 was in the sketch map of minimum point after camshaft 13 rotated 180 degree.

Following structure and operation principle with reference to Fig. 1,2,3 pairs of unidirectional cam drive structures described in detail.Unidirectional cam drive structure mainly comprises: camshaft 13, unidirectional cam 14, brush holder support axle 15 and return spring 16, brush holder support axle 15 latter ends that are positioned at brush holder support 17 are with return spring 16, unidirectional cam 14 is arranged between brush holder support axle 15 ends and the camshaft 13, under the effect of return spring 16, the bus of unidirectional cam 14 fits on the transverse post of camshaft 13 all the time.

The axle tight fit of camshaft 13 and motor 9, and rotation synchronously; Unidirectional cam 14 can only axially-movable and can not be rotated, and its cam curve such as Fig. 2, D are that peak, the E of bus is minimum point, and under the effect of return spring 16, the bus of unidirectional cam 14 fits on the transverse post of camshaft 13 all the time; Brush holder support axle 15 is by better flexible material manufacture, one end and pieces seat eccentric shaft 19 movingly, the other end is close to cam 14 under the effect of return spring 16, brush holder support axle 15 can move vertically, the effect of return spring 16 is to make cam 14 run to return behind the peak, and makes it cam 13 and fit.

The effect of unidirectional cam drive is: the string back and forth that rotatablely moving of motor 9 is converted to brush holder support axle 15 is moving, finally convert the swing of pieces to, its process is: when motor 9 rotates, its axle drives camshaft 13 and rotates synchronously, the transverse post of camshaft 13 is close to the curved surface of cam 14, when the transverse post of protruding arbor wheel 13 by the peak (D) of cam 14 curves when minimum point (E point) is rotated, then actuating cam 14 moves to brush holder support 17 directions, cam 14 promotes the brush holder support axle and moves in the same way, when rotating to the E point, the transverse post of camshaft 13 finishes pushing course, and when camshaft 13 laterally by the minimum point (E point) of cam 14 curves when peak (D point) rotates, then move round about by brush holder support axle 15 actuating cams 14 by return spring 16, finish the return process during to the D point, so circulation promptly realizes the effect of unidirectional cam drive.

Fig. 4 and Fig. 5 are its ratchet self-lock switch structural representation, and wherein Fig. 4 is the circuit turn-on sketch map, and this moment, ratchet shell fragment 4 contacted with ratchet electrode slice 6.Fig. 5 disconnects sketch map for circuit, and this moment, ratchet shell fragment 4 disconnected with ratchet electrode slice 6 because ratchet 5 rotates a ratchet.

Structure and operation principle with reference to Fig. 4,5 pairs of ratchet self-lock switchs are described as follows:

The ratchet self-lock switch is by ratchet shell fragment 4, the ratchet 5 of band ratchet electrode slice 6, motor electrode slice 7, switch lever 8 and cushion 10 are formed, the free end of motor electrode slice 7 presses on described ratchet electrode slice 6, press cushion 10 and can stir ratchet 5 one-directional rotation, realize the joint or the disconnection of ratchet shell fragment 4 and ratchet electrode slice 6 by switch lever 8.

Ratchet shell fragment 4 is the rubber-like sheet metal, is fastened on the handle casing 11 (also can be fastened on the other support), and an end presses in battery, and the other end is pressed in the ratchet of ratchet 5; Ratchet 5 is a plastic parts, and a plurality of ratchets are arranged, with ratchet shaft 12 movingly, can rotate around ratchet shaft 12 because the effect of ratchet shell fragment 4, ratchet 5 can only one-directional rotation; Ratchet electrode slice 6 is a sheet metal, is fastened on the ratchet 5, and its crooked foot stretches in the part sour jujube point of ratchet 5, and can electrically contact in certain position and ratchet shell fragment 4.Battery electrode sheet 7 is a sheet metal, and an end and motor electrode are affixed, and the other end presses and ratchet electrode slice 6, and can slide relatively; The effect of switch lever 8 is to promote tooth of ratchet 5 rotations under the effect of external force, and rebounds voluntarily after shedding external force; Switch cushion 10 is soft body, is right after on handle casing 11, and the external force effect can make its distortion pressing switch lever 8, rebounds automatically after external force sheds.

The effect of ratchet self-lock switch is: will form electric loop by battery spring 1, battery 2, lead 3, ratchet shell fragment 4, motor electrode slice 7 and motor 9 and be switched on or switched off.Its process is: when external force acts on switch cushion 10 and uses distortion pull switch lever 8, and then stir ratchet 5 and rotate a tooth position, external force sheds back switch cushion 10 and switch lever 8 pop into position, and ratchet 5 can not to turn round because of the effect of ratchet shell fragment 4 be self-locking.Ratchet 5 has foot that ratchet electrode slice 6 is arranged in the part ratchet, has part not have, when ratchet contacts with ratchet shell fragment 4 with the ratchet that turns to ratchet electrode slice foot, and then electric loop conducting (as Fig. 4), all the other then electric loops disconnections (as Fig. 5).

Fig. 6 is arranged on the interior embodiment of brush holder support for unidirectional cam drive structure.The camshaft 13 and the unidirectional cam 14 of unidirectional cam drive structure are positioned at brush holder support 17, an adapter sleeve 21 is installed between camshaft 13 and the motor drive shaft, the axle of one end of adapter sleeve 21 and motor 9 is fastening, the other end and camshaft 13 are movingly, but be respectively equipped with keyway and key, so adapter sleeve 21 can driving cam axle 13, camshaft 13 is taken out from handle with brushhead portion.

Claims

1, a kind of electric toothbrush of unidirectional cam drive comprises: handle casing, be installed in battery, motor and switch in the handle casing, and head portion and drive mechanism is characterized in that: described switch is the ratchet self-lock switch; Described drive mechanism adopts unidirectional cam drive structure, this drive mechanism is made up of camshaft, unidirectional cam, brush holder support axle and return spring that motor drives, the brush holder support axle latter end that is positioned at brush holder support is with return spring, unidirectional cam is arranged between brush holder support shaft end and the camshaft, under the effect of return spring, the bus of unidirectional cam fits on the transverse post of camshaft all the time.

2, according to the electric toothbrush of the described unidirectional cam drive of claim 1, it is characterized in that: when the camshaft of unidirectional cam drive structure and unidirectional cam are positioned at brush holder support, an adapter sleeve is installed between camshaft and the motor drive shaft, is cooperated for keyway and key between camshaft and the adapter sleeve.

3, according to the electric toothbrush of claim 1 or 2 described unidirectional cam drives, it is characterized in that: described ratchet self-lock switch is by the ratchet shell fragment, ratchet, motor electrode slice, switch lever and the cushion of band ratchet electrode slice are formed, the free end of motor electrode slice presses on described ratchet electrode slice, press cushion and can stir the ratchet one-way rotation, realize the joint or the disconnection of ratchet shell fragment and ratchet electrode slice by switch lever.

4, according to the electric toothbrush of the described unidirectional cam drive of claim 3, it is characterized in that: described ratchet electrode slice is fastened on the ratchet, and its crooked foot stretches in the part sour jujube point of ratchet, is used for electrically contacting with the ratchet shell fragment.