JPS628723A - Charge device of charge type cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a charging device for a small-sized rechargeable vacuum cleaner used in general households.

Conventional technology Rechargeable vacuum cleaners that use secondary batteries such as nickel-cadmium and lead batteries generally have low battery voltage, so in order to increase the power, it is necessary to increase the current value, and in this case, generally, The current value during discharging is about several amperes to 10 amperes, and the charging current value is usually 1 ampere or less at most from the viewpoint of cost and the like. Therefore, if you close the switch and enter the discharge state while the charging adapter is connected and the charging current is flowing, the charging current will flow from the battery and at the same time, the charging adapter will also flow to the load. A current flows, and this value is 2 times the normal charging current.
It was up to 3 times as much.

If such a large current flows out of the charging adapter, the charging adapter (which typically uses a transformer) will overheat, deforming the adapter case, or in severe cases, destroying the charging adapter. However, there was a problem in that wire breakage occurred.

Therefore, in order to solve these problems, conventionally, the third
A rechargeable vacuum cleaner using a circuit as shown in the figure has been proposed. During discharging, when switch 101 is closed, current flows from battery 102 to motor (load) 103. In this case, it is assumed that the relay contact 104 is closed. Further, during charging, a charging adapter (not shown) was connected to the connector IQ5, and a charging current was made to flow to the battery 1o2 via the charging control circuit 106 and the charging detection resistor 107. In this case, when the charging current flows, a voltage is generated across the charging detection resistor 107, and this voltage is detected by the charging detection circuit 108 to drive the relay 109, thereby opening the relay contact 104. . By doing this, the switch 101 can be
This prevents discharge current from flowing to the motor (load) 103 even if the switch is closed, and also prevents current exceeding the normal charging current from flowing from the charging adapter, thereby preventing overheating of the charging adapter and charging control circuit 106. I was trying to prevent destruction.

Problems to be Solved by the Invention However, in this configuration, since the charging detection circuit 108 and the relay 109 attached thereto are used, a complicated circuit is required, and the charging detection resistor 10 is also required. Since 7 is inserted, this leads to a loss of charging current, resulting in a complicated structure and high cost.

The present invention solves these problems and aims to provide a charging device for a rechargeable vacuum cleaner that does not require a complicated circuit or the like and does not discharge while the battery is being charged. purpose.

Means for Solving the Problems In order to solve the above problems, the present invention includes a rechargeable battery, a switch, a motor fan, and a detachable charging adapter for charging the battery. The plug of the charging adapter is inserted from a direction perpendicular to the opening direction of the movable piece constituting the switch to prevent the switch from closing.

Effects According to the above configuration, the plug of the charging adapter is inserted into the switch that also serves as the connector of the charging adapter from a direction perpendicular to the opening direction of the movable piece constituting the switch, and the closing operation of the switch is prevented. While the charging adapter is plugged in, the movable pieces that make up the switch will not be able to move.
As a result, the switch is no longer in a conductive state, so that discharging during charging of the battery can be reliably prevented.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

Figures 1a and 1b are cross-sectional views of the switch part of a rechargeable vacuum cleaner according to an embodiment of the present invention. The reference numeral 4 to which the switch knob 3 is rotatably attached is a push rod provided at the lower center of the switch knob 3.

Reference numeral 5 denotes a fixed terminal attached to the bottom of the switch case 1. One end of the fixed terminal 5 projects inward of the switch case 1, and a fixed contact 6 is provided at the one end.

Reference numeral 7 denotes a movable side terminal attached to the bottom of the switch case 1. A movable piece 8 is attached to one end of the movable side terminal 7 so as to be freely see-sawable. A movable contact 9 is provided. The fixed side terminal 5, the movable side terminal 7, and the movable piece 8 constitute a switch 10. 11 is a detachable charging adapter plug for charging a rechargeable battery (not shown);
This plug 11 is inserted into one connector 12 of the charging adapter attached to the switch case 1 from a direction perpendicular to the opening direction of the movable piece 8. At this time, the plug 11 comes into contact with the movable piece 8 which also serves as the other connector of the charging adapter. Although the main body of the vacuum cleaner is not shown, it is almost the same as a conventionally known one, and is equipped with a motor fan inside the main body.

The operation in the above configuration will be explained. When the charging adapter is not connected, by pushing the switch knob 3, the switch knob 3 rotates around the shaft 2, and the push rod 4 slides on the movable piece 8. As a result, the movable piece 8 performs a see-saw motion using the movable side terminal 7 as a fulcrum, and the contacts are opened and closed. In this case, one connector 12 of the charging adapter is provided in a position and dimension relationship that does not inhibit the movement of the movable piece 8.

Next, when the plug 11 of the charging adapter is inserted into one connector 12 of the charging adapter, as is clear from FIG. Since it is inserted with the other end pressed down, movement of the movable piece 8 is blocked even if the switch knob 3 is operated.
The closing operation of switch 10 is not performed.

FIGS. 2a and 2b show other embodiments of the present invention, and the same parts as those in FIGS. 1a and 1b are given the same numbers and their explanations will be omitted. The difference from the embodiment 1 shown in Fig. 1 a and b is that one connector 1 of the charging adapter is
2 is provided on the side of the movable piece 8 having the movable contact 9, and the plug 11 of the charging adapter is configured in a tapered shape. In the configuration of this embodiment, when the plug 11 of the charging adapter is inserted into one connector 12 while the switch knob 3 is in the closed circuit state, the movable piece 8 is forced to close because the plug 11 is tapered. As a result, the switch 1o can be immediately opened.

Effects of the Invention As is clear from the above description, according to the present invention, the plug of the charging adapter is inserted into the switch that also serves as the connector of the charging adapter from a direction perpendicular to the opening direction of the movable piece constituting the switch. Since the circuit-closing operation is prevented, discharging operation is not performed while the battery is being charged, and as a result, the charging adapter and the charging control circuit can be reliably protected. It is possible to improve the quality and reliability of rechargeable vacuum cleaners. Further, the configuration can be realized at a lower cost and in a smaller size than a conventional configuration consisting of a complicated circuit.

[Brief explanation of drawings]

Figures 1a and b are longitudinal cross-sectional views and side cross-sectional views of a switch section of a rechargeable vacuum cleaner showing one embodiment of the present invention, and Figures 2a and b are rechargeable vacuum cleaners showing another embodiment of the present invention. FIG. 3 is a circuit diagram of a conventional rechargeable vacuum cleaner. 8...Movable piece, 1o...Switch, 1
1... Charging adapter plug, 12...
...One connector of the charging adapter. Name of agent: Patent attorney Toshio Nakao and 1 other person @
1 Figure 8 - Town's first meal 11 - Light destination adapter 4f lag Figure 2 (α) (b)

Claims (3)

[Claims] (1) It has a rechargeable battery, a switch, a motor fan, and a removable charging adapter for charging the battery, and the charging adapter is inserted from a direction perpendicular to the opening direction of the movable piece constituting the switch. A charging device for a rechargeable vacuum cleaner configured to prevent a circuit closing operation of the switch by inserting the plug of the charging adapter into a switch that also serves as a connector. (2) The charging device for a rechargeable vacuum cleaner according to claim 1, wherein the movable piece of the switch also serves as one pole of the connector of the charging adapter. (3) The charging device for a rechargeable vacuum cleaner according to claim 1, wherein the plug of the charging adapter has a tapered shape.