JP2898660B2 - Electric toothpaste - Google Patents

Abstract

ABSTRACT OF THE DISCLOSURE An electric toothbrush has a reciprocating connecting rod in a brush member. The brush member is constructed as a brush head at its front end and has there two rows of rotatable bristle holders which each engage with a cam in a transversely running groove in the connecting rod. Rectilinear movement of the connecting rod leads to an alternating rotating movement of the bristle holders.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a handle with a motor and gears adapted to be guided manually and a hanging member having a brush head with a number of cylindrical bristle holders rotating separately from each other. The present invention relates to an electric toothbrush. Such tooth brushing is disclosed, for example, in US Pat. No. 4,156,620.

In the known toothing of this kind, the toothing member does not move. The teeth are cleaned by the rotational movement of the bristle holder.

In a toothbrush known from U.S. Pat. No. 4,156,620, the connecting rod is constructed as a toothed rack at the part of the toothing head. The bristle holders each have a gear inside the brush head, the gears in the rows of all bristle holders mesh with each other, and the second gear in each row meshes with the teeth of the toothed rack. Thus, the adjacent bristle holder rotates in the opposite direction when the connecting rod moves back and forth,
This is advantageous for cleaning teeth.

The known toothing is relatively complex in construction due to the number of gears and connecting rods configured as toothed racks. Tooth sticks must be manufactured with very tight intersections to prevent the gears from jamming. This increases production costs and there is a risk that slight inaccuracies in production may cause a stoppage of operation.

SUMMARY OF THE INVENTION It is an object of the present invention to improve the above-mentioned type of tooth loss so that it can be more strongly cleaned and at the same time gingival gingival surges can occur.

According to the invention, this object comprises a handle with a motor and gears adapted to be guided manually, and a hanging member having a brush head with a number of cylindrical bristle holders rotating separately from one another. Said gear is achieved by means of an electrically driven toothing arranged and arranged to vibrate and reciprocate the toothing holder.

Toothing in which the bristle member reciprocates in an oscillating motion as well as in a reciprocating motion is known, for example, from patent FR 1525112. However, the present invention is to apply the principle of the oscillating bristle member to tooth brushing in which a bundle of bristles rotates. This allows, in particular, an effective cleaning of the teeth and an even better gingival pine surge.

It is another object of the present invention to provide a toothbrush in which the individual bristle holders are driven by means which are at all simple by means of which the toothbrush can be manufactured economically and can operate in a particularly reliable manner. To provide. To this end, a connecting rod is provided on the inside of the brush head which has a laterally extending groove of its main extension and in which a bristle holder with a cam extending parallel to the axis of rotation respectively engages.

For such toothing, no gear is required to cause the bristle holder to rotate. The rotational movement of the bristle holder is simply caused by the connecting rod moving the cam due to its reciprocating movement. The drive is therefore of a very simple construction and does not require tight manufacturing tolerances. The term "transverse to the main extension" does not mean that the groove must be perpendicular to the main extension, but can also be oriented diagonally.
Diagonally extending projections instead of grooves are the same solution.

The connecting rod must have an inclined plane to rotate the cam.

In a particularly advantageous embodiment of the invention, the hanging head has two rows of adjacent bristle holders, and in the central position of the connecting rod, the cams of the two rows of bristle holders are such that they lie side by side with respect to the hanging members. It is arranged to face in the direction. As the cams face each other, the connecting rod is narrow in the area of the hanging head and each adjacent bristle holder in the row rotates in the opposite direction. If the cams are alternately arranged with respect to the center of the hanging head and to the outside of the hanging head, all bristle holders rotate in the same direction. Therefore, the present invention can change the identification direction of the bristle holder in a simple manner.

It is advantageous if the lifting head makes a circular movement with an electric toothbrush configured as a manual toothing for the lifting head. This circular movement is performed by a special gearing which can move the toothing shaft back and forth and rotate it about the longitudinal axis. An example of such a prior art is found in US Pat. No. 3,160,902. A known principle of the vibration of this toothing head is that if the connecting rod is provided non-rotatably on the hanging member and the hanging member is provided on the handle so as to rotate about its longitudinal axis, the connecting rod is also In addition to moving in the longitudinal direction, if the gear is configured to rotate the connecting rod alternately around its longitudinal axis, it can easily be applied to the toothing according to the invention.

The hanging member can be manufactured inexpensively and can be easily replaced according to another embodiment of the present invention, the hanging member is detachably connected to the huddle and the connecting rod is a shaft of the toothless. It has a snap connection at its handle end for connection to the vehicle.

Instead of rotating the entire hanging member about its longitudinal axis, according to another embodiment of the present invention, the individual bristle holders can alternately move somewhat farther from the hanging member, and the connecting rod is The hanging member on the handle can be rotated about its longitudinal axis within the hanging member, and the hanging member on the handle can be moved vertically if the bristle holder is provided so as to be movable axially with respect to the rotation axis of the hanging head. It can be installed non-rotatably around the axis.

A particularly simple gear that produces rotational and oscillating motion includes a bevel wheel driven by a motor bevel pinion and rotating about a pivot pin that extends transversely to the connecting rod and is mounted parallel to the pivot pin. The eccentric peg engages a recess in the rocker secured to the toothing shaft, the toothing shaft being axially movable and rotatably disposed with respect to the handle and extending longitudinally of the handle portion. Are located.

According to yet another embodiment of the present invention, the gear has two sliding blocks, wherein a sliding block inserted into the rocker recess is rotatably mounted on the eccentric peg and extends parallel to the toothing axis. If the sides and / or the side of the corresponding recess are curved or beveled to allow rocker rocking, they operate in particular with low friction and are manufactured very inexpensively.

The rocking movement of the rocker can, according to yet another embodiment of the invention, be carried out particularly simply if part of the rocker has a recess radially away from the toothing axis of the sliding block. . In this embodiment, the sliding block acts on the rocker pivot axis and, at the same time, on the rocker a considerable distance from the toothing axis. Therefore, a relatively large swinging motion is generated, and the vibrational motion of the hanging member is generated with a sufficiently large force.

The embodiment in which the eccentric pegs engage is very compact from the toothing side to the sliding block.

The invention is capable of many embodiments. An embodiment shown in the drawings will be described below to further clarify the principle of the present invention.

FIG. 1 is a perspective view of a tooth brush, which includes a handle 1 and a swing member 2 detachably and rotatably attached to the handle 1. As shown in FIG. A motor 3 provided on the handle 1 drives the toothing shaft 5 via a gear train 4 so that the toothing shaft 5 simultaneously makes an oscillating movement about its longitudinal axis and an axial translational movement. . The gearing 4 has a bevel pinion 6 driven by a motor 3 to drive a bevel wheel 7, which can be rotated about a pivot pin 8 provided in the transverse direction of the motor 3. The bevel wheel 7 has an eccentric peg 9 parallel to the pivot pin 8, and is rotatably mounted on a sliding block 10 provided on the inside of a rocker 11 so as not to rotate. Due to the circular motion path of the eccentric peg 9, the rocker 11 moves back and forth. The rocker 11 is fixed to the toothing shaft 5 and the toothing shaft 5
Is held in the handle 1 so as to be axially movable and rotatable, so that the rocker 11 cannot move to the side. This guiding of the tooth-braking shaft 5 causes the rocker 11 together with the tooth-braking shaft 5 to move around the longitudinal axis of the tooth-braking shaft 5 when the eccentric peg 9 moves out of the plane of the drawing, as will be explained in more detail below. Rock.

The connecting rod 12 is provided in the hanging member 2 so as to be movable in the axial direction with respect to the hanging member, but is not rotatable. The connection rod 12 is snap-connected 13 to the handle side end, and the snap connection 13 locks the rod.
Reference numeral 12 is locked so as not to rotate with respect to the toothing shaft 5. The hanging member 2 is thus detachably connected to the handle by the fitting joint 1. However, this fitting 14
The ratchet member 2 is configured to be rotatable about its longitudinal axis with respect to the handle 1, where the ratchet shaft 5 and thus the connecting rod 12 are necessarily limited in the amount of toothpaste. It will be able to rotate around the vertical axis.

The hanging member 2 has a hanging head 15 at its front end, into which several cylindrical bristle holders 16 to 20 are rotatably inserted, the holder projecting bristle groups 21 from the hanging head 15. I have. The hanging holders 16 to 20 each have a cam 22 inside the hanging head, and the cam 22 is connected to the connecting rod 12.
In a groove 23 extending in the lateral direction. As the connecting rod 12 moves back and forth, the cam 23 moves and the bristle holders 16 to 20 rotate.

FIG. 2 clearly shows the structure of the hanging member. The connecting rod 12 has a total of five continuous laterally extending grooves 23, 23a, 23b, 23c, 23d at the end of the hanging head, in which the cams 22 of the bristle holders 16 to 20 are engaged. I agree. In this embodiment, the hanging head 15 is configured such that parallel to the rows of bristle holders 16 to 20, further bristle holders 16b are provided with another bristle shown. Bristle holders 16b in a row
And other bristle holders also have grooves 23, 23a, 2 in the connecting rod 12.
3b 23c and 23d are engaged by cams 22b, respectively.
As shown in FIG. 2, the bristle holders 16 to 20 and 16b are all rotatably provided on the lid 24, and the lid 24 can be inserted into the hanging head 15 as an insert from above.

The sectional view of FIG. 3 shows that the bristle holders 16 to 20 are connected to the respective cams 22 by the respective grooves 23, 23a, 23b23c of the connecting rod 12.
And how to engage with 23d. FIG. 4 shows that at the central position of the connecting rod 12, the cams 22, 22b as well as the other cams hang from each other and are oriented laterally in the direction of the head 15.

FIG. 5 is an enlarged view of FIG. 1 showing a method in which the motor 3 drives the pepel wheel by the bevel pinion 6. The pivot pin 8 of the bevel wheel 7 is attached to the housing of the handle 1 at both ends. It can be seen from the drawing that the rocker 1 has a recess 25 on which the sliding block 10 rests. The eccentric peg 9 is rotatably engaged with the sliding block 10. The rocker 11 is non-rotatably and immovably connected to the toothless shaft 5. FIG. 6 shows that the recess 25 of the rocker 11, which rotatably engages the toothing shaft 5, is rectangular in cross section, and that the sliding block 10 is also rectangular. The sliding block 10 has a hole 26 in which the eccentric peg 9 is engaged. When the eccentric peg 9 is rotated by 180 ° to the lower position shown by the one-dot chain line, the rocker 11 also moves downward, and the toothless shaft 5 also moves in the axial direction. Eccentric peg 9
When taking the intermediate position (not shown) with respect to the tooth brushing shaft, the rocker 11 also tries to move in the lateral direction, but this is not possible because the tooth brushing shaft 5 is fixed in the horizontal direction. Instead of the lateral movement, the rocker 11 makes an oscillating movement. This is because the sliding block 10 is curved in an arc on the two side surfaces 27 and 28, and the toothing shaft 5 extends below the sliding block as shown in FIG. The oscillating movement is that the sliding block 10 pushes the rocker 11 sideways in its recess, the rocker 11 oscillating around the toothing shaft 5 and thus rotating the toothing shaft 5.

FIG. 7 shows the arcuate sides 27, 28 of the sliding block 10. The rocker 11 can assume a swinging position, and at the position shown in the eccentric peg 9, has rotated 90 ° from the position shown in FIG. 6 and has not moved laterally.

[Brief description of the drawings]

FIG. 1 is a diagram showing a low-profile longitudinal section of the toothbrush of the present invention, FIG. 2 is an exploded perspective view of the hanging member of the toothbrush shown in FIG. 1, FIG. FIG. 4 is a plan view of the front section of the hanging member, FIG. 5 is a longitudinal sectional view of the gear device of the toothing, FIG. 6 is a plan view of the gear device rocker shown with adjacent elements, and FIG. 7 is FIG. FIG. 7 is a cross-sectional view of the tooth brushing taken along line VII-VII of FIG. 1 ... handle, 2 ... hanging member, 3 ... motor, 4 ... gear device, 5 ... toothed shaft, 6 ... bevel pinion, 7 ... bevel wheel, 8 ... hip pin, 9 ... … Eccentric pegs, 10
…… Sliding block, 11… Rokka, 12 …… Connecting rod, 13
… Snap connection, 14… Mating joint, 15… Hanging head, 16-20… Hanging holder, 21… Bristles group, 22… Cam,
23 …… groove, 24 …… lid, 25 …… recess

Claims (9)

(57) [Claims] 1. A hand-guided handle having a motor and a gear, and a hanging member having a hanging head with a number of cylindrical bristle holders rotating independently of each other. Wherein the gear is an electric toothbrush configured and arranged to oscillate and reciprocate the hanging member, wherein a connecting rod is provided inside the hanging head to drive the bristle holder; The connecting rod is arranged to reciprocate in the longitudinal direction of the hanging member by a driving device, and the connecting rod has a groove inside the hanging head and extending transversely to a main extension of the connecting rod. An electric toothbrush in which the cams provided on each bristle holder and extending in parallel with their rotation axes engage with the grooves. 2. The hanging head has two rows of adjacent bristle holders, and in the central position of the connecting rod, the cams of the two rows of bristle holders are oriented such that they are oriented laterally to each other in the direction of the hanging members. The electric toothpaste according to claim 1, which is arranged. 3. The connecting rod is non-rotatably disposed within a hanging member, and the hanging member is rotatably disposed about a longitudinal axis on a handle, and a gear moves the connecting rod longitudinally. 2. The electric toothpaste according to claim 1, wherein said electric toothbrush is configured to rotate the connecting rod alternately around its longitudinal axis. 4. The electric toothbrush according to claim 3, wherein the hanging member is detachably connected to the handle, and the connecting rod has a snap connection at an end of the handle on the handle side to be connected to a toothing shaft. 5. The bristle holder in a hanging head, wherein the connecting rod is rotatably disposed within the hanging member about its longitudinal axis, and wherein the hanging member is non-rotatably disposed about its longitudinal axis. 2. The electric toothpaste according to claim 1, wherein the toothpastes are arranged so as to be movable in the axial direction with respect to their rotation shafts. 6. The gear is driven by a bevel pinion of a motor, rotates about a pivot pin extending laterally of a connecting rod, and has a rocker recess provided on a toothing shaft. A bevel gear that engages an eccentric peg mounted parallel to the pivot pin, the toothing shaft being axially movable and rotatable within the handle, and disposed longitudinally of the handle. The electric toothpaste according to claim 1. 7. A sliding block inserted into the rocker recess is rotatably mounted on an eccentric peg, and the sliding block has
7. The electric toothpaste according to claim 6, wherein one side is parallel to the toothing axis and / or the corresponding side of the recess is curved or inclined, causing the rocker to swing. 8. The electric toothbrush according to claim 7, wherein a part of the rocker having the recess for the sliding block is radially separated from the toothing shaft. 9. The electric toothbrush according to claim 6, wherein said eccentric peg engages with a sliding block from a side surface of the toothing shaft.