JPS599164B2 - electric toothbrush - Google Patents

Description

[Detailed description of the invention] This invention relates to an electric toothbrush.

In conventional electric toothbrushes, each part was individually attached to the housing, resulting in poor assembly efficiency.

Therefore, an object of the present invention is to provide an electric toothbrush that can improve the efficiency of assembly work.

A front view and a sectional view of an embodiment of the electric toothbrush of the present invention are shown in FIGS. 1 and 2, respectively.

In these figures, 1 is the housing, 2 is the lower cover,
3 is a switch lever, and 4 is a toothbrush.

The inside of the housing 1 is divided into two parts, with the upper side serving as a drive unit housing part 5 and the lower side serving as a battery housing part 6.

1. As shown in the side cross-sectional view of FIG. 3 and the plan view of FIG. 10a
a reduction gear 10 that plays with the eccentric pin 9, a drive lever 11 that engages with the eccentric pin 9, an output shaft 12 that is fitted into the drive lever 11 and rotated back and forth, a bearing 13, a waterproof Q IJ ring 14.
, an upper motor mount 15, a lower motor mount 16, an anode plate 17 for connecting the motor 7 and the battery, and a switch blade 18. A drive unit 19 is accommodated as shown in FIG.

This drive unit 19 is fixed by a fixing spring body 21 having a fixing piece 20, as shown in FIG.

The drive lever 11 has a long groove 11a in a direction perpendicular to the output shaft 12, and the eccentric pin 9 engages with the long groove 11a and moves from side to side within the long groove 11a by the rotation of the reduction gear 10. To press the wall, drive lever 1
1 swings around the output shaft 12, thereby causing the output shaft 12 to
is designed to rotate back and forth.

The lower moke mount 16 is adapted to be engaged with the upper motor mount 15 in a concave-convex manner, as shown.

On this upper motor mounting base 15, as shown in FIG.
4 and 25.

As shown in FIG. 2, a battery 26 is housed in the battery accommodating portion 6, and its lower end is supported by the lower cover 2 having waterproof rubber 27 via a suppression spring 22 connected to the cathode plate 23.

Switch lever 3, steel ball 2 translation spring 29, switch cam 3
0. A switch block 32 consisting of an O-ring 31 is attached to the upper part of the drive unit housing section 5, and is shown in FIG.
■As shown in FIG. 7, which shows a cross section, when the switch lever 3 is moved in the direction of the arrow (ON side) along the circumference of the housing 1, as shown in FIG. 8, which shows the cross section of FIG. Since the switch cam 30 presses the switch spring 18 as shown by the arrow and contacts the cathode plate 23, the motor 7 rotates.

Next, the assembly procedure of the electric toothbrush will be described. First, the steel ball 28, spring 29, and O-ring 31 are attached to the appropriate positions of the switch lever 3, and after this is attached to the upper part of the drive unit housing section 5, the switch The cam 30 is press-fitted and fixed, and the switch block 32 is assembled and fixed.

Next, the drive unit 19 is assembled.

That is, after the reduction gear 10, the drive lever 11, and the output shaft 12 are attached to the upper moke mount 15, the motor 7 with the gear 8 press-fitted onto the output shaft is inserted into the upper motor mount 15.

Then, attach the switch spring 1 to the top surface of the upper motor mounting base 15.
8, attach a cathode plate 23 to the side, and connect it to the terminal of the motor 7.

Next, attach the lower motor mounting base 16 to the upper motor mounting base 15.
The motor 7 is fixed by engaging with the motor 7.

Finally, the 01J ring 14 is fitted onto the output shaft 12.

After the drive section unit 19 assembled in this manner is inserted into the drive section unit storage section 5, it is fixed by the fixing spring body 21.

Next, the lower cover 2 is attached to the lower end of the housing 1 to complete the assembly.

In operation, when the switch lever 3 is moved to the ON side after the battery 26 is inserted, the motor 7 rotates.

This rotation is decelerated and transferred to the output shaft 1 via the drive lever 11.
2, the output shaft 12 reciprocates, and the toothbrush 4 reciprocates thereby.

As described above, the electric toothbrush of the present invention is an electric toothbrush in which an output shaft is reciprocated by swinging a drive lever by an eccentric pin of a gear with an eccentric pin driven by a motor. The motor is held between the upper motor mount and the lower motor mount that form a joint, and the shaft of the gear with an eccentric pin is integrally erected on the upper surface of the upper motor mount, reducing the number of parts and reducing assembly work. Efficiency can be increased.

[Brief explanation of drawings]

FIG. 1 is a front view of one embodiment of the present invention, FIG. 2 is a sectional view thereof, FIG. 3 is a sectional view of one drive unit, FIG. 4 is a plan view thereof, and FIG. 6 is a front view of the main part of FIG. 1, FIG. 7 is a sectional view of FIG. 2, and FIG. 8 is a sectional view of FIG. 2. 1...Housing, 4...Toothbrush,
7...Motor, 9...Eccentric pin, 10
...Reduction gear, 11... Drive lever,
12... Output shaft, 15... Upper motor mounting base, 16... Lower motor mounting base.

Claims (1)

[Claims] 1. In an electric toothbrush in which the output shaft is reciprocated by swinging a drive lever by an eccentric pin of a gear with an eccentric pin driven by a motor, the upper motor mounting base and the lower An electric toothbrush characterized in that the motor is held between side motor mounts, and the shaft of the eccentric pin gear is integrally erected on the upper surface of the upper moke mount.