JPH0220997Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric shaver component in which a switch contact of an electric shaver and a conductive terminal portion for connecting to a power source disposed at the bottom of the electric shaver are integrally connected.

First, a conventional example will be explained with reference to the drawings.
FIG. 1 is a vertical sectional view showing the structure surrounding a conventional switch.

In FIG. 1, an outer cutter 1 is insert-molded in an outer cutter support 2 made of synthetic resin, and has an outer cutter frame having a recess provided in a part of the outer cutter support 2 and a protrusion that connects with the recess. Combined with 3. The inner cutter 4, which closely slides on the outer cutter 1, is connected to a joint 7 press-fitted into the output shaft of a motor 6 built into the upper case 5. The upper part of the upper case has a bayonet joint shaped part that can be freely attached to and detached from the outer cutter frame 3 for connection with the outer cutter frame 3. Further, a threaded portion is provided on the lower outer periphery of the upper case 5, and a threaded portion is provided on the upper inner periphery of the lower case 8, so that the upper case 5 and the lower case 8 are screwed together. The battery spring 9 measures the (-) side conduction of the dry battery 10 housed inside the lower case 8.
The small diameter part that contacts the (-) pole part of 0 and the motor 6
It consists of a large diameter part that comes into contact with a contact point provided at the bottom.

In FIG. 1 of the conventional example, the (-) battery contact 11
is the motor bottom plate 12 arranged below the motor 6.
The battery spring 9 is fixed to the battery spring 9 by heat caulking or the like, and comes into contact with the large diameter portion of the battery spring 9. The (+) battery contact 13 is fixed approximately at the center of the motor bottom plate 12, and the (+) battery contact 13 of the dry battery 10
Contact with extreme parts. The switch button 14 is attached to the surface of the upper case 5, and a part thereof passes through a hole in the upper case 5 to support a switch shorting piece 15. The switch board 16 is positioned and fixed inside the upper case 5, and two-pole contacts are provided on its surface using copper foil. The switch short-circuiting piece 15 has two short-circuiting piece contact parts 17 that are in contact and electrically conductive with the two-pole contact parts provided on the switch board 16, and is used to press the short-circuiting piece contact parts 17 onto the switch board 16 at all times. A spring leg 18 is provided. In order to establish electrical continuity between the built-in dry battery 10 and the motor 6, the (-) battery contact 11 is connected to the (-) on the underside of the motor.
It is connected to the terminal 19 by a lead wire (not shown). Also, the (+) battery contact 13 is connected to the switch board 16.
The other contact portion of the switch board 16 is connected to the (+) terminal 20 on the lower surface of the motor 6 by a lead wire (not shown). In this configuration, by operating the switch button 14, the two contact portions 17 of the switch shorting piece 15 come into contact with the two pole contact portions of the switch board 16, and the dry battery 10 and the motor 6 are electrically connected. Drives the blade.

In the switch structure configured as described above, there are the following two structural problems. The first problem is
Between the (-) battery contact 11 and the (-) terminal 19, between the (+) battery contact 13 and the contact part of one pole of the switch board 16, and between the contact part of the other pole of the switch board 16 and the (+) terminal 20. Lead wire connections are required at three locations between the two, which increases costs due to the need for a large number of lead wires, which increases the number of parts and the number of man-hours required to assemble the wires. This may lead to a decrease in quality reliability, such as disconnection of the wire connections.

The second problem is the increase in switch configuration space. In other words, the switch shorting piece 15 always tries to bring the two pole contacts of the switch board 16 into contact with the shorting piece contact part 17 with a stable contact pressure, and in order to prevent it from becoming loose due to long-term mechanical stress, approximately
Spring legs 18 having a spring length of around 10 mm must be provided on both sides, and the total length _l1 of the switch shorting piece 15 becomes considerably large, and the switch button 14
Taking into account the operation stroke l ₂ minutes, the required internal length of the switch is at least l ₁ +l ₂ minutes, which is a problem in obtaining a switch structure in a small space.

The purpose of this invention is to eliminate these drawbacks, and its purpose is to improve the electrical reliability of the motor connection and switch connection, and to make the motor connection and switch connection smaller and simpler. It is.

The gist of the present invention is a case 5, a motor 6 that is housed in the case 5 and drives the inner cutter 4, and a motor 6.
The battery 10 stored below the motor 6, the switch plate 45 disposed on the side of the motor 6, the motor bottom plate 43 disposed below the motor 6 and above the battery 10, the switch plate 45, and the motor bottom plate. 4
3 and a bending part 4 formed to be freely bendable.
6 and a switch board 42 made of synthetic resin.
A contact board 30 made of a thin metal plate is attached to the outer surface of the switch board 42, and a switch button 34 is movably attached to the case and has a switch shorting piece 35 inside. 30
The battery 10 is arranged on the lower surface of the motor bottom plate part 43.
A pair of battery contact parts 31, 3 connected to each terminal of
3 and each of the battery contact portions 31 and 33, and the connecting beam 32 is formed to have a narrow width so as to be easily cut off.
and a pair of switch contacts 38 which are disposed on the outer surface of the switch plate portion 45 and which come into contact with and separate from the switch shorting piece 35 when the switch button 34 is moved.
39, a connecting beam 40 connecting the respective switch contacts 38, 39 and having a narrow width so as to be easily cut off, and a connecting beam 40 connecting the battery contact part 31 and the switch contact 38 and being bendable. This electric shaver part is characterized by having a bent part 41.

The present invention will be explained in detail below.

Fig. 2 is a longitudinal sectional view of the present invention, Fig. 3 is a sectional view taken along line A-A in Fig. 2, and Fig. 4 is a sectional view taken along line B-B in Fig. 2.
FIG. 5 is a sectional view taken along line CC in FIG.

In FIGS. 2 to 5, the contact board 30 is
A substantially annular (-) battery contact portion 31 made of a thin metal plate and a portion of which contacts the large diameter portion of the coiled battery spring 9.
and the (+) battery contact part 33 which is circular and in contact with the (+) pole part of the dry battery 10 and is connected to the inside of the (-) battery contact part 31 by a narrow connecting beam 32 (FIG. 5). The lower switch contact 3 has two legs and has a contact portion 36 and a spring leg portion 37 that contact the switch shorting piece 35 held by the switch button 34.
8, an upper switch contact 39 and a lower switch contact 38 have a contact part 36 and a spring leg part 37.
and a narrow connecting beam 40 that integrally connects the upper switch contact 39. Note that a bendable, approximately semicircular bent portion 41 is provided at the joint portion between the (-) battery contact portion 31 side portion and the connecting beam 40 side portion.

The switch board 42 is made of synthetic resin, and the motor bottom plate 43 and the motor 6 are located at the bottom of the motor 6.
It is integrally connected to a switch plate part 45 located on the back side of the switch button 34 by a bendable part 46 which is a thin and thick part. On the side of the motor bottom plate part 43, there is an upper case 5 as shown in FIG.
A spring leg portion 57 having a claw that fits into the hole 47 provided below is integrally provided. Switch plate part 4
5, a pair of click legs 58 each having a substantially semicircular protrusion at the tip, which is to cooperate with the pin portion 48 protruding from the back surface of the switch button 34 to perform a click operation when operating the switch button, are shown in FIG. I have it like that. Note that the switch board 42 and the contact board 30 are manufactured as parts in a flat state, and then, after inserting a pin protruding from the switch board 42 into a hole provided in the contact board 30, the pins are integrally joined by thermal caulking. Ru. and a part 32 of the connecting beam 32
(-) battery contact portion 31 by cutting a part 40a of the connecting beam 40 between the upper switch contact 39 and the lower switch contact 38 using a press or the like.
The contact board 30 is divided into a (+) battery contact portion 33, a lower switch contact 38, and an upper switch contact 39. In this state, when the bent portion 46 of the thin and thick portion of the switch board 42 is bent at right angles, the approximately semicircular bent portion 41 of the contact board 30 is also bent in the same manner as the switch board 42, and the motor bottom plate is bent as shown in FIG. When the claw at the tip of the spring leg 57 of 43 is inserted into the hole 47 of the upper case 5, the state shown in FIG. 2 is obtained. In addition to the above-mentioned pin portion 48, the back surface of the switch button 34 passes through a switch hole 49 in the upper case 5 as shown in FIG. 2 provided with a button locking protrusion 50 that catches on the
A book button spring leg portion 52 is integrally provided.
This button spring leg 52 slides on the inner wall of the switch hole 49 to guide the sliding of the switch button 34, and its tip is dimensioned to fit into the tip shape of the two middle button spring legs 52 of the switch shorting piece 35. - It enters the shaped shorting piece hole 54 and holds the switch shorting piece 35. When the switch button 34 is moved upward, the switch shorting piece 35 shown in FIG. The motor 6 and the dry battery 10 are electrically connected through two lead wires connected between the motor 6 and the (+) terminal 51 of the motor 6 and between the upper switch contact 39 and the (-) terminal 53 of the motor 6.

As described above, according to the present invention, the following useful effects can be obtained.

Since the motor bottom plate part 43 and the switch plate part 45 are not separate parts but are integrally formed by the bent part 46, the number of parts is small and handling is also simple.

A pair of battery contacts 31 and 33 attached to the lower surface of the motor bottom plate 43 are connected by a connecting beam 32, and a pair of switch contacts 38 and 39 attached to the outer surface of the switch plate 45 are also connected by a connecting beam. 4
0 and furthermore, by the bent portion 41, so that each battery contact portion and the switch contact point are obtained from one thin metal plate, so the number of parts is small and handling is easy. Furthermore, by cutting out the connecting beams 32 and 40, electrical insulation is achieved, so that the operation is reliable. In addition, since one of the aforementioned battery contact portions and one of the switch contact portions are connected by the bent portion 41, a lead wire is not required by this amount, and the reliability of conduction is improved.

The bending part 46 of the switch board 42 and the bending part 41 of the contact board 30 allow the switch board 4
Since the contact base plate 2 and the contact base plate 30 are respectively disposed on the bottom and side portions of the motor 6 by simply bending them, the assemblage becomes simple.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing the area around the conventional switch, Fig. 2 is a longitudinal sectional view of the present invention, Fig. 3 is a sectional view taken along line AA in Fig. 2, and Fig. 4 is a sectional view taken along line B-- B sectional view and FIG. 5 are CC sectional views taken along line C-C in FIG. 2. 30...Contact board, 31...(-) Battery contact portion, 33...(+) Battery contact portion, 38...Upper switch contact, 39...Lower switch contact, 41...
...Bending portion, 42...Switch board, 43...
Motor bottom plate section, 45...Switch plate section.

Claims (1)

[Scope of utility model registration request] A case 5, a motor 6 housed in the case 5 and driving the inner blade 4, a battery 10 housed below the motor 6, a switch plate 45 disposed on the side of the motor 6, and a lower part of the motor 6. battery 10
A switch board 42 made of synthetic resin and having a bending part 46 that connects the motor bottom plate part 43, the switch plate part 45, and the motor bottom plate part 43 arranged on the upper part of the switch board 42, and is made of synthetic resin. A contact board 30 made of a thin metal plate is attached to the outer surface of the board 42, and a switch button 3 is movably attached to the case and has a switch shorting piece 35 inside.
4, the contact board 30 connects a pair of battery contact parts 31, 33 disposed on the lower surface of the motor bottom plate part 43 and connected to each terminal of the battery 10, and each of the battery contact parts 31, 33. and a pair of switch contacts 38 that are arranged on the outer surface of the switch plate portion 45 and that come into contact with and separate from the switch shorting piece 35 when the switch button 34 is moved. , 39 and the respective switch contacts 38, 39, and a connecting beam 40 formed to have a narrow width so as to be easily cut off; An electric shaver component characterized in that it has a bent part 41.