JPH03210488A - Charging type electric machinery - Google Patents

Abstract

PURPOSE:To enhance the accuracy of charging urging function by mounting a switch contact for turning a motor ON/OFF and a switch contact for turning a charge urging circuit ON/OFF and connecting both mechanically cooperated switch contacts in parallel to a storage battery. CONSTITUTION:A switch contact A is arranged on the side of a motor 41 from the connection point of the motor 41 and a charge urging circuit 8 and a switch contact B is arranged on the side of the charge urging circuit 8 from the connection point. The switch contact A turning the motor 41 ON/OFF and the switch contact B turning the charge urging circuit 8 ON/OFF are cooperated to be almost simultaneously turned ON/OFF. However, since both contacts A, B are separated from a circuital aspect, the charge urging circuit 8 is connected to a storage battery 40 without passing through the switch contact A and, therefore, when the switch contact B is turned ON, the charge urging circuit 8 measures the voltage of the storage battery 40 without receiving the effect of the switch contact A and, when this voltage is a set value or less, a light emitting element 17 is allowed to emit light to urge charging.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to rechargeable electrical equipment, and particularly to a rechargeable electrical equipment that has a function of prompting charging by detecting the voltage of a storage battery.

[Conventional technology]

There are rechargeable electrical devices that detect the battery voltage of a built-in storage battery and display a display prompting charging when the voltage falls below a set voltage. The switch for the charging reminder circuit 8 that performs the above-mentioned charging is also used as an on/off switch for the motor 41, which is the load of the electrical equipment. In the figure, 40 is a storage battery.

[Problem to be solved by the invention]

In this case, the current that drives the motor is much larger than the current that flows through the charging reminder circuit, and due to fluctuations in the contact resistance of the contact between the motor and the storage battery, the fluctuation in resistance ΔR
xMotor load current1. There is a problem in that a voltage fluctuation occurs, and this causes a large difference between the voltage detected by the charging reminder circuit and the actual battery voltage, which deteriorates the accuracy of the charging reminder display. The present invention has been made in view of these points, and its purpose is to provide a rechargeable electric device that exhibits a highly accurate charging reminder circuit.

[Means to solve the problem]

Therefore, the present invention provides a charging reminder circuit that detects the battery voltage of a storage battery and displays a charging reminder display, and also provides a first charge reminder circuit for turning on and off the motor in a rechargeable electric device equipped with a motor as a load. It is characterized in that it includes a switch contact and a second switch contact that turns on and off the charging reminder circuit, and both mechanically interlocked switch contacts are connected in parallel to the storage battery. [for fl:] According to the present invention, the charging reminder circuit is not affected by voltage fluctuations due to changes in the contact resistance of the first switch contact for turning the motor on and off. [Example] The present invention will be described in detail below based on an example of a rechargeable electric shaver shown in the drawings. As shown in FIGS. 2 to 5, the main body 1 to which the outer cutter frame 2 to which the outer cutter 20 is attached is connected at its upper end includes a cylindrical housing 10 and a cylindrical housing 10.
The housing is composed of a lower M11 that closes the bottom opening of the housing 10, and an upper 1112 that is attached to the upper end of the housing 1o.The housing 10 is attached to the storage battery 4o, the motor 41, and the output shaft of the motor 41. It has a built-in drive element 43 connected to an eccentric shaft 42, and a switch handler 1 and a lock handle 52 are arranged on the surface via a plate 50, and a trimmer block 6 is attached. ing. In the figure, reference numeral 16 denotes a copper plate for attaching and detaching the outer cutter frame 2. The drive element 43 converts the rotation of the motor 41 into reciprocating motion, and the inner cutter 7 is attached to a portion that projects upward through the central opening of the upper cover 12, as shown in FIG. In the figure, 46 is a gasket for waterproofing the central opening of the upper lid 12. The switch handle 51 is slidably arranged on the surface of the I/- port 5o, and an eccentric shaft 54 protruding from a cam 53 rotatably disposed in a hole 19 formed in the housing 10 is attached to the back surface of the switch handle 51. the switch handle 5
The cam 53 rotates with the slide of step 1. On the other hand, a base 45 to which the motor 41 and storage battery 40 are attached is provided inside the main body 1.
A pair of movable contact plates 5656 and fixed contact plates 7, 57 are disposed on the surface of each pair. Ryocho movable contact plate 56 that is pressed and driven by the cam 53
．． As shown in FIGS. 4 and 7, 56 is located on both sides of the cam 53 and faces the fixed contact plates 57.57, and of the movable contact plates 56.56, The movable contact plate 56 located on the right side in Figure 7 is a lift-off type and is located on the left side! The movable contact plate 56 is of a lift-on type, and the movable contact plate 56 is further moved by the cam 53.
56 is selectively pressed. In other words, as shown in FIG. 7(a), when the semicircular cam 53 presses the movable contact [56 on the right side of the figure], both the movable contact plates 56 and 56 are separated from the fixed contact plates 57 and 57. When the cam 53 is turned off as the switch handle 51 is operated, the cam 53 is turned off as shown in FIG. 7(b).
When presses the movable contact plate 56 on the left side in the figure, both movable contact plates 5656 contact the fixed contact plates 57 and 57 and are turned on. In addition to opening and closing the two circuits, the switch handle 51 also opens and closes the trimmer block 6, and when the trimmer block 6 is protruded, the switch handle 51 opens and closes the trimmer block 6 as shown in FIG. 7(b). ) From the state shown in ), the cam 53 rotates slightly counterclockwise, and the two circuits are kept in the ON state. Further, a lock handle 52 connected to the back side of the switch handle 51 to prevent accidental movement of the switch handle 51 prevents sliding operation of the switch handle 51 by engaging with a click protrusion 18 provided on the surface of the main body 1. It is integrally provided with click protrusions 58 that provide clicks at a plurality of locations. FIG. 1 shows a block circuit diagram. A charging reminder circuit 8 configured by a voltage detection circuit 81, a booster circuit 82, a lighting circuit 83, and a light emitting element 17 connects a storage battery 40 to a motor 4.
1 and is connected in parallel with switch handle 5
Of the two contact parts mentioned above that are opened and closed by operation 1, switch contact A is a lift-on type that can increase contact pressure. The switch contact B, which is disposed on the motor 411111 and is of a lift-off type and cannot maintain a high contact pressure between the movable contact plate 56 and the fixed contact plate 57 when turned on, is more sensitive to charging than the above-mentioned connection point. It is arranged on the circuit 8 side. Incidentally, the connection between the anode of the storage battery 40 and each contact portion is made by an anode terminal plate 55 shown in FIG. 4, and the pair of movable contact plates 56 and 56 are attached to this anode terminal plate 55. . The charging reminder circuit 8 is constructed as a separate module and is separately installed near the storage battery 40 as shown in FIG. 5, and when installed, extends from the fixed contact plate 57 shown in FIG. The terminal fitting 58 is brought into contact with the terminal fitting 58 connected to the cathode of the storage battery 41. Now, in this case, although switch contact A, which turns on and off the motor 41, and switch contact B, which turns on and off the charging reminder circuit 8, are turned on and off almost simultaneously, they are divided into circuits. Therefore, the charging reminder circuit 8 is connected to the battery 40 without passing through the switch contact A.
When turned on, the charging reminder circuit 8 measures the voltage of the storage battery 8 without being influenced by the contact resistance of the switch contact A, which is responsible for turning on and off the motor ↓1, and if this voltage is below the set value, Charging can be prompted by causing the light emitting element 17 to emit light.

【Effect of the invention】

As described above, in the present invention, the switch contact placed between the charge reminder circuit and the storage battery is dedicated to the charge reminder circuit, and the switch contact for turning the motor on/off connects the charge reminder circuit and the storage battery. Since it is not included in the circuit, the charging reminder circuit is not affected by voltage fluctuations due to fluctuations in the contact resistance of the switch contacts for loads through which large currents flow, thus providing a highly accurate charging reminder function. It is something that can be obtained.

[Brief explanation of drawings]

Fig. 1 is a block circuit diagram of an embodiment of the present invention, Fig. 2 is a front view of an electric shaver equipped with the same as above, and Fig. 3 is the same as above: J'
J side view, Figure 4 is a cutaway front view of the same, Figure 5 is a vertical sectional view of the same, Figure 6 is an exploded oblique view of the same, Figure 7 <a> (
b) is a partial front view of the northern part, and Fig. 8 is a block circuit diagram of the conventional example, where 8 is a charging reminder circuit, 40 is a storage battery, and 41 is a block circuit diagram of a conventional example.
indicates the motor, and A and B indicate the switch contacts.

Claims (1)

[Claims] (1) In a rechargeable electrical device that is equipped with a charging reminder circuit that detects the battery voltage of a storage battery and displays a charging reminder, and also has a motor as a load, the first switch contact for turning the motor on and off, and the charging reminder circuit. and a second switch contact for turning on and off the rechargeable electrical device, wherein both mechanically interlocking switch contacts are connected in parallel to a storage battery.