JPH0642340B2 - Small electrical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention has a load and a battery disposed inside a cylindrical body case of an electric razor, a portable electric lamp, etc., and a push button for controlling the load is attached to the side surface. The present invention relates to an electric device and a mounting structure of a switch mechanism part having a push button as one component.

(B) Prior Art As an example of a conventional switch mechanism section, Japanese Patent Laid-Open No. 58-192
The rechargeable electric device disclosed in Japanese Patent No. 263 will be described briefly.

In the above publication, a switch handle is slidably attached using the flat surface of the housing, while a motor and a battery positioned by a base are housed inside the housing, and a switch spring and a contact mounted on the base are housed. A structure is disclosed in which the lug is brought into contact with and separated from the lug by a sliding operation of the switch handle.

A waterproof rubber is interposed between the switch handle, the switch spring and the contact lug, and the peripheral edge of the rubber is pressed against the housing at the periphery of the switch cover and the flat part of the switch handle. It is tightly sealed. Wiring between the switch spring and the contact lug, the motor and the battery, or between the charging plug and the battery is performed by a printed circuit board arranged at the bottom of the housing.

By the way, a rubber switch using a conductive polymer has recently appeared, and various products using the rubber switch are on the market. For example, electric razor SV-E2 manufactured by Sanyo Electric Co., Ltd.
4 or SV-E44 (see the specification and drawings first attached to the application of Japanese Utility Model Application No. 59-83122 filed on June 5, 1984) is one of them, and A push button member for integrally forming an ON button and an OFF button of the motor is attached to a printed circuit board disposed inside the main body case so as to face the push button member so as to be contactable and separable from each other. In such a rectangular main body case, it is easy to dispose the printed circuit board facing the push button member as described above, but when the main body case is cylindrical, the conventional printed circuit board has a case inner wall and a substrate. The wasted space between the two becomes large, which has a great influence on the miniaturization of the device.

Further, in JP-A-58-192263, a waterproof rubber is interposed between the switch handle, the switch spring and the contact lug. When a rubber push button is used, the waterproof rubber can be obtained by effectively using this push button. There is no need to intervene, and it should be possible to streamline costs and manufacturing.

(C) Problems to be Solved by the Invention Problems to be solved by the present invention include a switch mechanism section having a novel material and configuration for adopting a conventional rubber switch in an electric device having a cylindrical body case. It is to develop and improve the switch operability of this kind of electric equipment.

(D) Means for Solving the Problems A load and a battery, which are held by a supporting member, are disposed inside a cylindrical main body case, and a switch member for ON-OFF control of the load is provided on one side of the main body case. In the case of mounting, the flexible printed circuit board, in which the switch member is composed of a push button member made of a dielectric polymer, and the switch contact is patterned, is supported so that the contact faces the push button member. It can be attached along the peripheral wall of the member.

(E) Action By flexibly bending or bending the flexible printed circuit board according to the shape of its mounting location, extra space is provided between the cylindrical main body case and its internal load and battery support member. It can be stored without leaving.

(F) Embodiment Hereinafter, the present invention will be described in detail with reference to an embodiment of the electric shaver shown in FIGS. 1 to 4.

(1) is a synthetic resin cylindrical body case, the outer blade frame (3) to which the dome-shaped outer blade (2) can be attached is detachably screwed on the upper part, and the battery replacement described later on the bottom part. For this purpose, the bottom cap (4) is detachably screwed. A ring-shaped rubber packing (not shown) is fitted into the joint between the bottom cap (4) and the body case (1) to prevent water from entering the battery. In addition, (5) is the main body case (1)
Is a decorative member attached so as to cover the upper surface and the outer peripheral surface of the upper part, and the outer cutter frame (3) is screwed into the thread portion (6) provided upright on the decorative member (5). , The thread portion (6)
The hair collection part where the cut waste collects in the part surrounded by
(7) is formed. Further, the decorative member (5) has a through hole (8) formed in the center of the upper surface thereof, and a screw is provided on the upper part of the main body case (1).
(9) Mounted and fixed via (9). And the decorative member
(5) and the main body case (1) between the through hole (8) to prevent water and hair dust from entering the main body case (1) inside, and the surrounding packing. The rubber ring (11) is attached and fixed.

(12) is a central partition plate that is press-fitted inside the main body case (1).
It is a support member on which the motor (14) is positioned above the (13) and the dry battery (15) which is a power source of the motor (14) is positioned below the partition plate (13). The drive shaft (16) of the motor (14) passes through the opening (17) formed in the upper surface of the main body case (1) and the through hole (8), and passes through the hair collecting part (7) to the outside. It fits into an inner blade member (not shown) located in the blade frame (3). Further, recesses (18) and (18) are formed on the upper surface of the motor (14), and bosses (19) and (19) are integrally formed on the inner surface of the upper part of the main body case (1) so as to hang down. ,
The rattling of the motor (14) is prevented by fitting the bosses (19) (19) into the recesses (18) (18). Further, the motor (14) is located in a portion surrounded by support walls (20), (21) and (22) which are provided upright from the peripheral edge of the partition plate (13).

Reference numeral (23) is an IC chip sandwiched between the support wall (21) and one side surface of the motor (14), and the inside of the chip (23) is a transistor or a PU constituting a switching circuit.
A semiconductor element such as T is clogged.

Reference numeral (24) is a printed circuit board arranged along the outer surface of the support wall (20). Although the supporting wall (20) has a substantially U-shaped cross section, the printed circuit board (24) having a flexible characteristic is used. Therefore, as shown in FIG. It can be bent on both sides and is thus mounted in the recess (25) of the support wall (20) so as to surround the motor (14). Moreover, the printed circuit board (24) has a wiring pattern formed on the surface thereof by a method such as etching as shown in FIG. Among these wiring patterns, (26) (27) are contacted with the contact of the push button member described later, so that the leads (28) (29) or the leads (28) (30) are contacted.
They are an ON contact part and an OFF contact part that short-circuit between them. (31)
(32) is a notch and a through hole formed in the printed board (24), and when the printed board (24) is mounted on the support wall (20), the terminal piece (33) of the motor (14) (34) these notches
It engages with (31) and through hole (32) and is electrically connected to the lead patterns (35) and (30) on the printed circuit board (24) by soldering. Further, (36) and (36) are positioning small holes formed in the printed circuit board (24), which are fitted to small protrusions (not shown) formed on the front surface of the support wall (20), and are turned on / off.
This is for positioning the F contact parts (31) (32) at proper positions. Furthermore, the ON / OFF of the printed circuit board (24)
On the back surface of the contact parts (26) (27), the contact part (2
6) Adhesive such as double-sided tape is attached or applied so that (27) can be closely attached. Printed circuit board (24) to motor (14)
If it can be directly attached, it is not necessary to use the support wall (20), and the diameter of the main body case (1) can be made smaller, but in the case of a waterproof electric shaver, the main body case (1) is divided into two. Instead, the motor (14) is mounted by inserting it upward from the bottom of the body case (1), so that the positioning operation between the bosses (19) (19) and the recesses (18) (18) Since the printed circuit board (24) may be wrinkled when the motor (14) slightly moves, the printed circuit board (24) is intentionally attached to the support wall (20) in this embodiment. One end of the printed board (24) is also connected to the chip (23).

(37) is a rubber push button member having a contact material (38) (39) made of a conductive polymer on the back surface, and the motor (1)
4) A pair of pressing parts (40) (41) that control the drive of ON-OFF
The main body case is provided by a holding plate (44) having a through hole (42) (43) for exposing the pressing portion (40) (41) to the outside.
It is mounted in the side surface recess (45) of (1). Claw pieces (46) (46) are formed on the periphery of the back surface of the holding plate (44), and locking portions (47) (47) are formed on one of the main body cases (1). . Then, the claw pieces (46) (46) are connected to the engaging portion (4
7) The pressing plate (44) is locked and fixed in the side surface recessed portion (45) by being locked in the side surface recessed portion (45). The printed circuit board through the through holes (48) (49)
It is opposed to the ON / OFF contact parts (27) and (26) of (24) so that it can come into contact with and separate from it.

The periphery of the push button member (37) is liquid-tight with the body case (1) by the periphery of the holding plate (44) when the holding plate (44) is mounted on the body case (1). Since it is held by the edge of the push button member (37), the waterproof property of this portion is treated by the peripheral edge of the push button member (37).

(G) Effect of the Invention According to the present invention, as described above, the load and the battery held by the supporting member are arranged inside the cylindrical body case, and the ON-OFF control of the load is performed on one side of the body case. In the case of attaching a switch member for use in a flexible printed circuit board, the switch member is constituted by a push button member made of a conductive polymer, and a switch contact is patterned to form a flexible printed circuit board with the contact facing the push button member. As described above, the switch mechanism can be attached along the peripheral wall of the support member, and the switch mechanism portion in an electric device having a cylindrical main body case can be configured without wasting space, and in particular, a device using a dry battery as a power source. In the case of the present invention, all wiring parts that were conventionally scattered, including the battery storage part, are collected in the switch mechanism part in the present invention, so wiring is rationalized. There is that effect.

[Brief description of drawings]

FIG. 1 is a front view (partially cutaway view) of an electric shaver which is an embodiment of the small electric device of the present invention, and FIG. 2 is A- of FIG.
FIG. 3 is a schematic perspective view of the electric shaver, and FIG. 4 is a plan view of a flexible printed circuit board. (1) ... Main body case, (20) ... Supporting member, (14) ... Load, (15)
… Batteries, (37)… push button members, (24)… flexible printed circuit boards.

Claims (2)

[Claims] 1. A switch in which a load and a battery held by a supporting member are disposed inside a cylindrical main body case and a switch member for ON-OFF control of the load is attached to one side of the main body case. A flexible printed circuit board, in which the member is composed of a push button member made of a conductive polymer, and a switch contact is formed in a pattern is provided along the peripheral wall of the support member so that the contact faces the push button member. A small electric device that can be attached. 2. The small electric device according to claim 1, wherein the back surface of the flexible printed circuit board on which the switch contact is located is adhered to the supporting member.