JPS5917615B2 - electric razor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric shaver, and more particularly, to an electric shaver that can use three power sources: a dry battery, a rechargeable battery, and an AC power source via a rechargeable rectifier.

F. In conventional electric shavers of this type, the dry cell battery is prevented from being connected to the power supply circuit at the connection part of the charging rectifier, which is called an AC adapter, so that AC power is not applied to the dry cell battery when it is installed in the machine. However, with this configuration there is no problem when using a charging rectifier dedicated to that razor, but if another charging rectifier can be connected, it may be difficult to connect that rectifier. However, the switch may not open the charging circuit of the rechargeable battery and the battery may be energized, causing an unexpected situation.

There is also a known structure in which a rechargeable battery is stored in a battery case and a charging rectifier is connected to this battery case, but it is not possible to connect an AC power source with the rechargeable battery removed, so only dry batteries can be used. However, it is inconvenient as a portable device and has poor handling.Furthermore, the battery case that houses the rechargeable battery must be provided with a connection terminal for a charging rectifier, which complicates the configuration of the battery case. It has some drawbacks. The present invention has been made in view of the above-mentioned drawbacks, and when a dry battery is stored in the battery storage section, the rechargeable battery circuit is disconnected.
In addition to opening the battery compartment, a connection terminal for a charging rectifier is provided separately from the battery compartment, allowing the use of three power sources: dry batteries, rechargeable batteries, and a charging rectifier, and improving the safety and handling of the device. It provides electric razors. 5 Next, the configuration of an embodiment of the present invention will be explained with reference to the drawings.

Reference numeral 1 designates the body of an electric shaver, and this body 1 is formed with a battery storage part 3 having an opening 2 formed on the lower surface, and this storage part 3 has rib-shaped ribs that hold the outer periphery of a rechargeable battery 4 and a dry battery 5. A protrusion 6 is integrally formed.

Further, a fixed contact piece 9 is fixed at the center of the inner end of the storage portion 3 to make contact with the anode terminal 7 of the rechargeable battery 4 or the anode terminal 8 of the dry battery 5. Furthermore, the opening 2 of this storage section 3
A conductive elastic contact piece 11 rotatably attached to a conductive connecting fitting 10 is disposed on one side. This contact piece 11
The arcuate contact portion 14 contacts the cathode terminal 12 of the rechargeable battery 4 or the cathode terminal 13 of the dry battery 5, and the contact portion 1
A pressing portion 15 formed by folding back and bending from 4 is formed of one elastic spring wire. Further, an engaging protrusion 16 is formed on one side of the opening 2 of the storage portion 3, and a locking protrusion 17 is formed on the other side. Further, an engagement protrusion 19 that removably engages with the engagement protrusion 16 is formed at one end of the lid 18 that closes the opening 2 of the storage section 3, and a guide hole 20 is formed at the other side. It is formed.

A locking body 21 is slidably disposed on the inner surface of this lid body 18, and a locking protrusion 22 that is removably locked to the locking protrusion 17 and a locking protrusion 22 that is removably locked to the locking protrusion 17 and A knob 23 protruding from the guide hole 20 is provided, and this locking body 21 is biased by a wire spring 24 in a direction in which the locking protrusion 22 engages with the locking flange 17. The locking body 21 is slid by the pressing operation against the wire spring 24, and the locking protrusion 22 is moved against the locking protrusion 1.
7 is disengaged. The locking body 21 is slidably held by a receiving plate 25 fixed to the inner surface of the lid 18, and when the lid 18 is closed, the receiving plate 25 presses the pressing portion 15 of the elastic contact piece 11. The contact portion 14 is pressed against the cathode terminals 12 and 13 of the rechargeable battery 4 or the dry battery 5, and at the same time, the anode terminals 7 and 8 of the rechargeable battery 4 or the dry battery 5 are pressed together.
is pressed into contact with the fixed contact piece 9. Next, the rechargeable battery 4 is housed in a case body 26 so as to have approximately the same outer diameter as the dry battery 5, and the anode terminal 7 and cathode terminal 12 are exposed and covered from both ends of the case body 26. A reduced diameter portion 28 is formed on the outer periphery of the case body 26 on the anode terminal 7 side so as to form a recess 27 serving as a relief portion.

Next, reference numeral 29 denotes a switch for opening the rechargeable battery circuit 30, which is disposed in a switch arranging section 31 formed in the body 1 adjacent to the battery storage section 3.

This switch 29 is formed of a fixed contact piece 34 with both side legs 33 fixed to a printed wiring board 32, and a movable contact piece 36 with a tip contact part 35 brought into contact with and separated from the fixed contact piece 34. The leg portion 33 of the piece 34 is connected to the circuit of the wiring board 32 by soldering, and the base of the movable contact piece 36 is engaged with the engaging protrusion 37 of the wiring board 32, and is held in an inclined shape to apply a force. The contact portion 35 is always in resilient contact with the fixed contact piece 34. Also, this movable contact piece 36
An arcuately curved actuating portion 38 is formed in the middle portion of the actuator.
This operating portion 38 protrudes into the storage portion 3 through a communication portion 40 formed in a partition wall 39 between the battery storage portion 3 and the switch installation portion 31 of the body 1, and is connected to the outer periphery of the dry cell battery 5 stored in the storage portion 3. When pressed, the contact portion 35 of the movable contact piece 36 is separated from the fixed contact piece 34, the switch 29 is opened, and the rechargeable battery circuit 30 is opened. When inserted, the actuating part 38 of the movable contact piece 36 is located in the recess 27 of the rechargeable battery 4, so the actuating part 38 is not pressed and the switch 29 is held in the closed state. Note that both ends of the wiring board 32 are engaged and held in engagement grooves 41, 41 formed in the switch installation portion 31.

Further, the body 1 is provided with connection terminals 43 and 44 located at the lower part of the switch installation part 31 to connect the charging rectifier 42, and these connection terminals 43 and 44 are formed in a pin shape,
It faces an insertion opening 45 of the connector of the charging rectifier 42 adjacent to the opening 2 of the storage section 3 .

Further, the machine body 1 has a built-in electric motor 46 as a load, and the electric motor 46 causes the inner blade (not shown) to rub against the inner surface of the outer blade.

Next, the electric circuit will be explained with reference to FIG. 2.

A light emitting diode 47 and a first fixed contact 49 of a main switch 48 are connected to one connection terminal 43 to which a charging rectifier 42 is connected.
are connected in series, and the switching contact piece 50 of this main switch 48
is connected to the other connection terminal 44 to which the charging rectifier 42 is connected via a switch 29 that opens and closes the rechargeable battery circuit 30. Further, a rechargeable battery circuit 30 is connected between the one connection terminal 43 and the switch 29, the fixed contact piece 9 is connected to the one connection terminal 43, and the elastic contact piece 9 is connected to the switch 29 via a resistor 51. A contact piece 11 is connected. Further, a second fixed contact 53 of the main switch 48 is connected to a connection point 52 between the elastic contact piece 11 and the resistor 51.

Further, a motor 46 is connected between the one connection terminal 43 and the third fixed contact 54 of the main switch 48, and voltage regulating diodes 55, 56 such as silicon diodes are connected in parallel and in series with the motor 46. is connected.

Further, the main switch 48 is configured such that when the switching contact piece 50 is switched to one side, the first fixed contact 49 is closed, and when the switching contact piece 50 is switched to the other side, the second and third fixed contacts 53 and 54 are closed. It's summery.

Further, in the charging rectifier 42, a primary winding 60 of a transformer 59 is connected between terminals 57 and 58 connected to an AC power supply, and a full-wave rectifier consisting of silicon diodes 62 and 63 is connected to a secondary winding 61 of the transformer 59. Connection terminals 65 and 66 are connected to the connection terminals 43 and 44 via a circuit 64, respectively, and are detachably connected thereto.

Next, the operation of this embodiment will be explained.

When the dry battery 5 is used as a power source, when the dry battery 5 is stored in the battery compartment 3 of the aircraft body 1, the anode terminal 8 of the dry battery 5 is brought into contact with the fixed contact piece 9, and the cathode terminal 13 is brought into contact with the elastic contact piece 11.
be contacted.

The operating portion 38 of the movable contact piece 36 of the switch 29 is pressed by the outer periphery of the dry battery 5 and separated from the fixed contact piece 34, thereby opening the switch 29 and opening the rechargeable battery circuit 30. In this state, when the switching contact piece 50 of the main switch 48 is switched to close the second and third fixed contacts 53 and 54, the discharge circuit of the anode terminal 8 of the dry battery 5, the motor 46, and the cathode terminal 13 of the dry battery 5 is opened. is formed, and the electric motor 46 is driven. At this time, current flows through the voltage adjusting diodes 55 and 56, but the current is so small that no problem occurs. Further, when the switching contact piece 50 of the main switch 48 is switched to open the second and third fixed contacts 53 and 54, the discharge circuit is opened and the electric motor 46 is stopped. Further, when the dry cell battery 5 is stored in the storage section 3, the switch 29 is open, so even if the charging rectifier 42 is connected to the connection terminals 43 and 44, the current from the charging rectifier 42 is applied to the dry battery 5. never be done. Next, when using the rechargeable battery 4 as a power source, the anode terminal 7 of the rechargeable battery 4 stored in the battery storage part 3 of the aircraft body 1 is brought into contact with the fixed contact piece 9, and the cathode terminal 12 is brought into contact with the elastic contact piece 11. .

Further, the actuating portion 38 of the movable contact piece 36 faces the recess 27 of the case body 26 of the rechargeable battery 4, the movable contact piece 36 is not pushed, and the switch 29 is held in the closed state. In this state, when the switching contact piece 50 of the main switch 48 is switched to close the second and third fixed contacts 53 and 54, the anode terminal 7 of the rechargeable battery 4, the motor 46, and the cathode terminal 1 of the rechargeable battery 4 are connected.
Two discharge circuits are formed, and the motor 46 is driven.
At this time, current flows through the voltage adjusting diodes 55 and 56, but the current is so small that no problem occurs. Also main switch 48
The switching contact piece 50 of the second and third fixed contacts 5 is switched.
When 3 and 54 are opened, the discharge circuit is opened and the motor 4
6 is stopped. When the rechargeable battery 4 is stored in the storage section 3, the charging rectifier 42 is connected to the connection terminals 43 and 44, the first fixed contact 49 of the main switch 48 is closed, and the charging rectifier 42 is connected to the AC charging rectifier 42. When the current is applied, the switch 29 is closed, and the current flows through the rechargeable battery 4 connected to the full-wave rectifier circuit 64 and the rechargeable battery circuit 30 including the resistor 51, and the rechargeable battery 4 is charged. At the same time, the light emitting diode 47 is energized, and the light emitting diode 47 emits light.
Charging status is displayed. Also, in this state, the main switch 48
When the second and third fixed contacts 53 and 54 are closed,
The light emitting diode 47 is turned off, the electric motor 46 is driven, and the rechargeable battery 4 is charged.

Further, the charging rectifier 42 is connected to the battery compartment 3 of the aircraft body 1 without the dry batteries 5 and the rechargeable batteries 4 installed, and the AC power source is connected, and the second and third fixed contacts 53 of the main switch 48 are connected. When 54 is closed, the electric motor 4
A rectified current flows through the motor 46, and the electric motor 46 is driven.
At the same time, current also flows through the diodes 55 and 56, causing the motor 4
In order to prevent the rotational speed of the motor 46 from abnormally increasing even if the terminal voltage of the transformer 6 exceeds the rated value, and to charge the rechargeable battery 4 effectively, the secondary voltage of the transformer 59 is made higher than the characteristic voltage of the motor 46. becomes possible.

Although the electric shaver was explained in the above embodiment,
The present invention is not limited to electric shavers, but can be applied to various electric appliances, especially portable electric appliances. According to the present invention, a switch is provided to open the rechargeable battery circuit when a dry battery is stored in the battery storage section of the aircraft/body, and a connection terminal for a charging rectifier is provided on the aircraft body separately from the storage section to connect the rechargeable battery circuit. Since it is possible to conduct electricity to the load using a charging rectifier, three types of power sources, dry batteries, rechargeable batteries, and AC power sources, can be selectively used.Moreover, when dry batteries are installed, the rectified power source is connected to the load via the charging rectifier. There is no flow, no unexpected situations occur, and AC power can be used even when a rechargeable battery is not installed, making it convenient as a portable razor and improving ease of handling.

In addition, the switch that opens the rechargeable battery circuit is operated by the outer periphery of the dry battery, which reliably prevents current from flowing to the dry battery. Since a recess is formed, when a rechargeable battery is attached, it can be reliably charged and the configuration can be simplified.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway rear view of an electric shaver showing one embodiment of the heather invention, and FIG. 2 is an electric circuit diagram of the same. 1...Airframe, 3...Battery compartment, 4.
...Rechargeable battery, 5...Dry battery, 9,11
...Contact piece, 27...Recess, 29...
...Switch, 30...Rechargeable battery circuit, 3
4... Fixed contact piece, 36... Movable contact piece,
38... Actuation part, 42... Charging rectifier, 43, 44... Connection terminal, 46...
・Electric motor, 48... Main switch.

Claims (1)

[Scope of Claims] 1. A contact piece that is capable of selectively replacing a dry battery and a rechargeable battery that is formed to have substantially the same external shape as the dry battery and has a recess formed in the outer periphery, and that contacts one terminal of both the batteries. A battery housing part provided at both ends with a contact piece that contacts the other terminal of both batteries separated and facing each other, and a switch arrangement part formed adjacent to the side of this battery housing part are formed in the fuselage body. The movable contact piece of the switch that opens and closes the charging battery circuit is made up of a fixed contact piece provided on the switch installation part and a movable contact piece that is brought into contact with and separated from the fixed contact piece, and the movable contact piece of the switch is protruded into the battery storage part and the charging An actuating part is formed that is located in a recess on the outer periphery of the battery to maintain contact between the fixed contact piece and the movable contact piece, and is pushed by the outer periphery of the dry battery to separate the movable contact piece from the fixed contact piece, and A connection terminal for connecting a charging rectifier is provided at a separate location from the battery storage part, and an electric motor is provided in the machine body that is connected to both batteries via a main switch and slides the inner blade body along the inner surface of the outer blade, By switching the main switch, the battery stored in the battery storage section can be connected to the electric motor, and by connecting the charging rectifier to the connection terminal, the charging battery circuit and the motor can be selected by switching the main switch. An electric razor characterized in that it is connected to the electric shaver.・