JPS61164536A - Charging type electric machinery - 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 (A) Field of Industrial Application The present invention relates to rechargeable electric appliances such as small and lightweight rechargeable vacuum cleaners that use rechargeable batteries as a power source.

(b) Prior Art For example, Japanese Utility Model Publication No. 38-19224 discloses a vacuum cleaner in which the suction force can be changed by switching the resistance value of a resistor with a switching tap. However, according to such conventional examples, power is wasted in the resistor and the resistor itself also generates heat, so a heat dissipation means is required.
If the suction force changing means described above is applied to a rechargeable vacuum cleaner as shown in Japanese Patent No. 83129, the operating time per charge will be reduced, and the vacuum cleaner itself will become heavy, making it impossible to reduce its weight. be.

(c) Problems to be Solved by the Invention The present invention provides a method for switching the strength of suction power without wasting power in a rechargeable electric appliance such as a rechargeable vacuum cleaner that uses a rechargeable battery as a power source. This eliminates heat generation from the electrical equipment itself, and also ensures that each battery is fully charged.

(d) Means for Solving the Problems The rechargeable electric device of the present invention includes a first battery group and a second battery group having the same charging capacity, and a series connection or a parallel connection of the first and second battery groups; an operation switch for switching to a separated state; a motor that can be driven by the first and second battery groups; and a motor interposed between the first and second battery groups in the separated state to It is characterized by comprising a charging power source for charging the second battery group.

(E) By operating the action switch, the first and second battery groups are connected in series or in parallel, and the suction force of the fan motor is switched between two levels, strong and weak, and the charging of these battery groups is performed using the fan motor. This is done in series connection through the

(f) Example (1) is a main body of a rechargeable vacuum cleaner, in which an intake port (3) is provided at the front W (2) and a handle (4) is formed at the rear. ) The lower part has a built-in rechargeable battery (5), and the front! 1! (2) Fan motor (6) at the rear
has a built-in fan (6a) arranged to face the intake port (3). (7) is a flip-type operation switch built into the main body (1), which is opened and closed by a seesaw-type operation button (8) exposed from the main body (1) near the handle (4). (9) is the handle (4) of the main body (1).
) The charging jack is located at the lower rear.

(October) A dust collection case connected to the main body (1) so as to cover the main body (1), with a suction port (11) provided at the front end, and a paper filter (12) and a filter support (1).
3) is stored.

(14) is a charging adapter for supplying power to the rechargeable battery (5) in the main body (1), and the tip of the cord (15) can be inserted and connected to the charging jack (9) of the main body (1). It is equipped with a charging plug (16).

Next, in the electric circuit diagram shown in FIG. 1, (17) is a charging transformer housed in the charging adapter (14), and the secondary winding is connected to the charging plug (17) via a rectifying diode (18). 16) Positive and negative sides! Terminal (19a) (1
9b). In addition, (20) and (21) are the first foam group and the $2 battery group having the same charging capacity constituting the rechargeable battery (5), respectively.
It consists of two Ah nickel-cadmium batteries connected in series. Furthermore, (22) and (23) are the operation switches (
7), the switching contacts (22) and (23) of these switches (22) and (23) are
2c) (23c) are the respective first contacts (22a) (23a
) and the second contacts (22b) (23b), and the first operation surface (
The switching contact piece (22c) (
23c) is inserted into the first contact (22a) (23a) side, and the switching contact piece (22c) (23c) is pressed only while the second operation surface (8b) of the operation button (8) is pressed.
can be completely inserted into the second contact (22b) (23b) side. (24a) is a positive power receiving terminal;
is connected to the positive electrode of the bubble group (21), the first contact (22a) of the first switch (22), and the second contact (23b) of the second switch (23). (24b) is a negative power receiving terminal connected to the negative electrode of the first battery group (20) and the switching contact piece (22c) of the first switch (22).

The fan motor (6) has one end connected to the positive electrode of the first battery group (20) and the switching contact piece (23c) of the second switch (23), and the other end to the second battery group (20).
2), the negative electrode of the first switch (22), 12 contacts (
22b).

Therefore, since the operation switch (7) is always kept in the off state when the main body (1) is not in use, the first and second battery groups (2
G) (21) can be separated and these battery groups (20) (
21) in which a fan motor (6) is interposed,
In this state, the charging plug (16) of the charging adapter (14)
) are inserted and connected to the charging jack (9) to charge these battery groups (20) and (21). At this time, charging current also flows through the fan motor (6), but since this current is a very small amount determined by the capacity of the charging transformer (17), the fan motor (6) does not operate. The internal resistance of the first and second battery groups (20
)(21) acts as a charging current limiting resistance.

On the other hand, when the first operation surface (8a) of the operation switch (7) is pressed, the first and second switches (22) are
(23) is inserted into the first contacts (22a) and (23a), and the first and second battery groups (20 and 21) are connected in series and power is supplied to the fan motor (6).
6) can rotate at high speed and obtain strong suction power.

At this time, if the charging plug (16) is left connected, the secondary winding of the charging transformer (17) will be short-circuited, but since the resistance of the secondary winding is large, no excessive current will flow, so this is not a practical problem. do not have.

When the second operation surface (8b) of the operation switch (7) is pressed, the first and second switches (22) are activated only when the second operation surface (8b) of the operation switch (7) is pressed.
(23) is fully connected to the second contacts (22b) and (23b), and the first and second battery groups (20) and (21) are connected in parallel and power is supplied to the fan motor (6).
) can be rotated at low speed to obtain weak suction power. At this time, if the charging plug (16) is left connected, high voltage will be applied to the first and second battery groups (20) and (21).
Since the operation switch (7) is of a rebound type, if the pressure is released, problems due to high voltage will not occur and the battery group (20) (
21) will not have a negative impact.

(g) Effects of the Invention According to the present invention, the strength of the suction force is changed by switching between series connection and parallel connection of the first and second battery groups by operating an operation switch, which is different from the conventional example in which this is done by changing the resistance. There is no needless power consumption as in the above, and it can be used for a long time with a single charge, and it can be lightweight because there is no need for heat dissipation means.

Furthermore, since the motor is interposed between the first and second battery groups at all times, that is, when not in use, if charging is performed in this state, the internal resistance of the motor becomes the charging current limiting resistance, and each The batteries can be reliably fully charged. Furthermore, if the operation switch is a rebound type switch, the first switch will be activated when not in use.
, the second battery group is not left in a parallel state, and is not charged in a parallel state.

[Brief explanation of drawings]

The drawings all relate to an embodiment of a rechargeable vacuum cleaner of the rechargeable electric device of the present invention, and FIG. 1 is an electric circuit diagram, FIG. 2 is a perspective view, and FIG. 3 is a cross-sectional side view. <20)...First battery group, (21)...Second! Pond group, (7)...operation switch, (6)...fan motor, (22)...first switch, (23)...second switch. Figure 2 Figure 3

Claims (2)

[Claims] (1) A first battery group and a second battery group having the same charging capacity; an operation switch that switches the first and second battery groups to series connection, parallel connection, and separation; and the first and second battery groups. and a charging power source that charges the first and second battery groups by interposing the motor between the first and second battery groups in the separated state. device. (2) The rechargeable electric device according to claim 1, wherein the operation switch is a rebound type switch.