JPH0116363Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to motor-driven small electrical equipment such as electric shavers and electric hair clippers, in which one electrode of the motor and an electrode terminal of the same polarity as that of the battery that powers the motor. The purpose is to improve the ease of assembling conductive plates that electrically connect.

Conventionally, in this kind of small electric equipment, a partition wall is provided inside the main body case, and one electrode of a motor housed on one side of the partition wall is connected to one electrode of the motor housed on one side of the partition wall, and the other electrode is connected to the other side of the partition wall through a conductive plate attached to the partition wall. There is one in which the electrode terminals of the same polarity as that of the housed battery are electrically connected.

Such conductive plates are usually assembled and fixed to the bulkhead using rivets, screws, etc., but the assembly process not only requires tools, but also requires a lot of effort and time, and is extremely troublesome. There are some difficulties.

This invention focuses on this fact and allows the conductive plate to be easily and quickly assembled and held on the partition wall within the main body case without using rivets, screws, or the like.

The details will be explained below based on the drawings.

The drawing shows an electric shaver which is an example of a small electric device according to this invention, and as shown in FIG. It consists of a blade unit 3 to be attached.

The main body case 1 is integrally molded entirely of plastic, and has a cylindrical box-shaped grip portion 1 that houses the battery 4.
a, and a bowl-shaped head portion 1b into which a drive unit 2 having a motor 5 is assembled, and the head portion 1b is integrally formed with the upper part of the grip portion 1a in a forward-sloping shape.

Inside the main body case 1, the inside of the head part 1b and the inside of the grip part 1a are partitioned by a partition 6, and a fifth
As shown in the figure, an anode conductive plate 7 is attached to the partition wall 6.

As shown in FIG. 2, the anode conductive plate 7
It has a first motor contact part 8 and a battery contact part 9 which are bent into a shape and are vertically opposed to each other. The battery contact portion 9 is made longer than the first motor contact portion 8;
The cross section is formed into a dogleg shape, and one piece 9a of the dogleg shape has approximately the same length as the first motor abutment part 8. Further, a side piece 9b is provided protruding from one side edge of one piece 9a of the battery contacting portion 9, and a second motor contacting portion 10 is provided extending approximately parallel to the first motor contacting portion 8 from the side piece 9b. It will be done.

In FIGS. 3, 5 and 6, the partition wall 6
, a slit 11 having approximately the same length as the width of the battery contacting portion 9 of the conductive plate 7 is formed diagonally through the partition wall 6 in the thickness direction, and a retaining protrusion 12 parallel to the slit 11 is provided to accommodate the motor. Projected from the side. Anode conductive plate 7
Insert the battery contact part 9 into the slit 1 from the motor housing side.
1 so as to face the battery storage side, and the partition wall 6 is sandwiched between the first and second motor contact parts 8 and 10 and the battery contact part 9. At this time, the bent portion 13 of the anode conductive plate 7 is brought out to the motor accommodating side and brought into contact with the retaining protrusion 12, thereby ensuring that the anode conductive plate 7 is prevented from being pulled out toward the motor accommodating side. Even with such a retaining protrusion 12, the battery contacting portion 9 of the conductive plate 7 is formed to have a dogleg shape in cross section, so that the battery contacting portion 9 can be easily inserted into the slit 11.

The drive unit 2 housed within the head portion 1b has an upper lid 14 and a motor 5 mounted on the upper lid 14. The upper lid 14 has a central opening 1 on the lower surface side.
The output shaft of the motor 5, ie, the drive shaft 17, protrudes upward from the motor 7. As shown in FIGS. 3 and 4, the upper cover 14 is assembled into the head portion 1b from above, and the lower edge of the opening of the motor case 16 is connected to a motor case receiving projection erected on the inner bottom surface of the head portion 1b. It is received and supported at 21 via an elastic ring 22. Further, the central protrusion 5a on the lower end surface of the motor 5 presses into contact with the first motor contact portion 8 of the anode conductive plate 7, and the anode contact 23 protruding from the lower end surface of the motor 5 contacts the second motor contact portion 8. It presses into contact with the contact part 10. The upper cover 14 is finally integrally connected to the head portion 1b with tapping screws 25.

The blade unit 3 mounted on the upper part of the drive unit 2 has a circular hair tray 38, an inner blade 40 mounted on the hair tray 38 via an inner blade holder 39, and an outer blade holder 41 on the hair tray 38. It has a dome-shaped mesh outer cutter 42 that is attached through the dome-shaped mesh outer cutter 42. In this blade unit 3, a bottom plate 44 integrally connected to the bottom side of the hair receiving tray 38 is bayonetly connected to the upper surface of the upper cover 14, and a drive shaft 17 protruding from the center of the upper cover 14 is connected to the inner blade holder 39.

On the other hand, as shown in FIG. 3, a battery 4 is accommodated in the grip portion 1a of the main body case 1 through the bottom opening, and the anode terminal of the battery 4 is pressed into contact with the battery contact portion 9 of the anode conductive plate 7. The bottom opening of the grip part 1a is screwed into the bottom lid 2 through an elastic ring 28.
The lid is closed at 9. Further, a lead terminal 30 is attached along the inner wall surface of the grip portion 1a, and the lead terminal 3
The upper end 30a of the head portion 1b passes through the partition wall 6.
A cathode spring 31 made of a conical coil spring is connected to the lower edge of the lead terminal 30 so as to be bendable. The cathode spring 31 is received and supported by the inner surface of the bottom cover 29 and comes into contact with the cathode surface of the battery 4.
A motor cathode switch terminal 32 formed by a leaf spring is interposed between the inner surface of the motor case 16 and the motor 5 so that the movable contact 32a extends further below the lower opening edge of the motor case 16.
2a can be moved toward and away from the upper end 30a of the lead terminal 30 by sliding the switch operation knob 33. That is, an opening/closing switch pin 34 is installed on a part of the peripheral wall of the motor case 16 so as to be movable in the radial direction, and a switch operation ring 35 having the switch operation knob 33 is rotated in the circumferential direction by a fixed stroke. The exterior can be slid freely. Switch operation knob 33
The ring 35 faces outward from the notch 36 of the head portion 1b, and as shown in FIG. 7, a switch pin operating cam piece 37 having a switch pin pressing portion 37a and a pressing release portion 37b is provided on the lower surface side of the ring 35. In the normal state where the ring 35 is located at the outer end 34a of the open/close switch pin 34 as shown by the solid line in FIG. 3, the open/close switch pin 34 is in a non-pressed state. The movable contact 32a of the terminal 32 is separated from the upper end 30a of the lead terminal 30 to switch off. When the switch operation ring 35 is slid with the switch operation knob 33 and the opening/closing switch pin 34 is pushed inward into the motor case 16 using the switch pin pressing portion 37a, the switch terminal 32 is moved to the pin 34 as shown by the imaginary line in FIG. In response to the pushing force, the movable contact 32a contacts the upper end 30a of the lead terminal 30, the switch is turned on, the motor 5 is driven, and the inner blade 40 is rotated.

In the above embodiment, the conductive plate 7 serves as a contact piece for the motor 5 and separates the first motor contact part 8 and the second motor contact part 10. The motor contact portions 8 and 10 may be integrated so that the anode contact 5a of the motor 5 is pressed into contact with the motor contact portions 8 and 10.

The conductive plate 7 can be used as a conductive plate for connecting the cathode parts of the motor 5 and the battery 4 instead of connecting the anode parts of the motor 5 and the battery 4.

It goes without saying that the present invention can also be applied to motor-driven small electric appliances other than electric shavers, such as electric hair clippers.

As explained above, according to the small electric device of this invention, the slit 11 is provided in the partition wall 6 inside the main body case 1, while the conductive plate 7 made of a leaf spring is
Since the conductive plate 7 is shaped like a letter and has a battery contact part 9 and a motor contact part 10 facing each other, the conductive plate 7 can be easily inserted into the slit 11 without using rivets or screws. With this operation,
The motor contact part 10 can be arranged to face the motor housing side of the bulkhead 6, and the motor battery contact part 9 can be arranged to face the battery housing side, respectively, and the arrangement state is such that the motor contact part 10 and the battery contact part 9 face each other. The partition wall 6 can be held in an assembled state where the slit side edge 6a of the partition wall 6 is sandwiched between the parts 9. The assembled state is such that the motor contact portion 10 is in elastic contact with the motor 5, and
The battery contact portion 9 is reliably held by elastically contacting the battery 4, and there is no uneven movement or detachment of the conductive plate 7 on the partition wall 6, and the connection state between the motor 5 and the battery 4 can be maintained in a good condition.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an electric shaver which is an example of a small electric device according to this invention, Fig. 2 is an exploded perspective view of the electric shaver, Fig. 3 is a longitudinal side view of the electric shaver, and Fig. 4 is a longitudinal cross-section thereof. 5 is a front view, FIG. 5 is a perspective view of a state in which the conductive plate is assembled to the main body case of the electric shaver, FIG. 6 is a plan view of the assembled state, and FIG.
The figure is a perspective view of the switch operation ring. DESCRIPTION OF SYMBOLS 1... Main body case, 4... Battery, 5... Motor, 6... Partition wall, 7... Conductive plate, 9... Battery contact part, 10... Motor contact part, 11... Slit.

Claims (1)

[Scope of utility model registration request] In a small electric device in which a main body case 1 having a partition wall 6 inside has a motor 5 arranged and housed on one side of the partition wall 6 and a battery 4 arranged and housed on the other side, a slit 11 is provided in the partition wall 6, and a slit 11 is provided in the partition wall 6. A conductive plate 7 made of a leaf spring to be attached is formed in a U-shape and has a battery contact part 9 and a motor contact part 10 facing each other, and the conductive plate 7 is inserted into a slit 11 to connect the motor. The slit side edge 6a of the partition wall 6 is sandwiched between the motor contact part 10 facing the storage side and the battery contact part 9 facing the battery storage side, and the motor contact part 10 is connected to the electrode terminal of the motor 5. Elastic contact, battery contact part 9
A small electric device characterized in that the electrode is in elastic contact with the electrode end of the battery 4.