JPH0824187A - Chargeable dc/ac vacuum cleaner - Google Patents

Abstract

PURPOSE:To provide a chargeable DC/AC vacuum cleaner which incorporates a power source part for removably holding, to a body, a battery for feeding a DC current to a motor fan, laterally or rearward of a drive chamber, and in which a cord connecting part for a domestic AC power is located within the power source part. CONSTITUTION:A power source part 15 storing therein a battery 14 is formed in rear of the upper part of a drive chamber 9, and is closably covered with an outer cover 16 which is removably attached to a body 1. A cord connecting part 31 for connecting a power source cord 17 when a motor fan 7 is driven for rotation by a domestic AC power source is provided underneath the incorporated battery 17, and is provided with a pair of connection terminals 20. A pair of DC terminals 23 provided in the power source part 15 is opposed to a pair of battery terminals 24 formed on one side surface of the battery 14, and the terminals close a D.C. power circuit with each other when the battery 14 is stored in the power source part 15. Further, when a body switch 26 is manipulated, the DC power circuit and the AC power circuit can be opened and closed outside of the body 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dual-purpose electric vacuum cleaner.

[0002]

2. Description of the Related Art Conventionally, an electric vacuum cleaner for both charging and discharging, which selectively uses both a DC power source by a charged storage battery and a household AC power source, is disclosed in Japanese Patent Laid-Open No. 61-131720. The structure disclosed in Japanese Patent Laid-Open No. 63-38425 and the structure disclosed in Japanese Utility Model Laid-Open No. 4040449 are generally used.

[0003]

However, Japanese Unexamined Patent Publication No. Sho 61-61
In Japanese Patent Laid-Open No. 131720 and Japanese Patent Laid-Open No. 63-38425, when an AC power source is used, the storage battery is still built in the main body. However, when trying to use a high-capacity battery to improve the suction performance when using it as a cordless vacuum cleaner with a storage battery and to extend its usage time, unfortunately the high-capacity storage battery becomes large and heavy. Therefore, it was necessary to use a small and lightweight storage battery at the expense of usage time and suction performance. This situation is not limited to handy type vacuum cleaners, and is similar to general floor moving type vacuum cleaners.

Further, when the AC power supply is used, it is necessary to switch the DC power supply circuit to the AC power supply drive circuit by arranging a device that automatically opens the circuit by switch operation, cord connection detection, etc., which complicates the circuit configuration and increases the cost. Was invited.

Further, according to the one disclosed in Japanese Utility Model Laid-Open No. 64-40449, it is of course necessary to separately prepare a charging drive case and a charger case equipped with a DC motor and an AC motor. It was high and not practical.

SUMMARY OF THE INVENTION It is an object of the present invention to solve these problems and provide a highly practical electric vacuum cleaner for dual charging at low cost.

[0007]

A first means of the present invention for attaining the above object is to provide a dust collecting chamber for accumulating the sucked dust, an electric blower, and a drive circuit incorporating a control circuit for controlling the electric blower. A room and a power supply unit that detachably holds a storage battery for supplying a direct current to an electric blower in a main body, and a cord connection unit for supplying an AC current for home use is arranged in the power supply unit.

The second means is that the power source is located at the rear end of the main body, and the power cord for AC power supply is pulled out in the rearward direction of the main body.

The third means is to form the cord connecting portion of the power cord by bending it by approximately 90 degrees.

A fourth means is to form a fitting rib for holding a cord connecting portion of a power cord on an outer lid which covers the power source portion and is detachably held by the main body.

[0011]

When the vacuum cleaner is used with a household AC power source, the storage battery is removed from the main body and the cord is fitted and connected to the cord connecting portion to supply the power. To do. At this time, since the heavy storage battery is removed from the main body, the main body of the product becomes lightweight and the main body can be lightly pulled around. Further, since the storage battery is removed and the connection cord is connected, the AC power supply and the DC power supply are not used at the same time, and a complicated drive power supply circuit switching mechanism is not required.

According to the second means, it is possible to effectively utilize the length of the power cord and also to obtain high durability against the disconnection of the power cord at the outlet of the main body.

As a third means, the cord connecting portion of the power cord is formed by bending it by approximately 90 degrees, so that the power cord can be easily attached to and detached from the cord connecting portion.

By means of the fourth means, even when the power cord is pulled during use with AC power, no tension is applied to the cord connecting portion, and as a result, the durability against disconnection of the power cord is improved. It is a thing.

[0015]

An embodiment of the present invention will be described below with reference to the drawings.

1 to 5, the main body 1 of the electric vacuum cleaner is shown.
Has a dust collection chamber 6 in the front, which houses a paper bag 5 for filtering and accumulating dust sucked through the floor suction device 2, the extension pipe 3, and the hose 4, and an electric blower 7 and a DC power supply boosting unit 8 in the rear. It has a drive chamber 9 containing therein. A front lid 10 is attached above the dust collection chamber 6 to cover the dust collection chamber 6 so as to be openable and closable, and a dust collection amount display device 12 is attached to the central portion of the upper body 11 which covers the drive chamber 9 from above. Covered with a top lid 13.

A weight of about 1.6 kg is provided behind the upper portion of the driving chamber 9.
A power supply unit 15 for accommodating the storage battery 14 of
The main body 1 is covered with a detachable outer lid 16 so as to be freely opened and closed. Below the built-in storage battery 14, a cord connecting portion 31 for connecting the power cord 17 when the electric blower 7 is rotationally driven by a household AC power source is provided, and the cord connecting portion 31 is a female connecting portion. A pair of connection terminals 20 are provided, which are formed by 18 and a connection recess 19 for fitting and connecting them. The other end of the power cord 17 is a connection plug 21 that can be connected to a household AC power outlet.
A cabtire cord 22 is integrally connected between the female connection portion 18 and the female connection portion 18.

Reference numeral 23 denotes a pair of direct current terminals provided in the power supply section 15, which is a pair of battery terminals 2 formed on one side surface of the storage battery 14.
4, the DC power supply circuit 25 is closed with the storage battery 14 housed in the power supply unit 15. Reference numeral 26 is a main body switch arranged on the upper surface of the main body 1, and the DC power supply circuit 25 and the AC power supply circuit 27 can be opened and closed from the outside of the main body 1 by its operation. Reference numeral 28 denotes a circuit switching device that automatically detects the presence or absence of the storage battery 14 in the power supply unit 15 and automatically switches between the AC power supply circuit 27 and the DC power supply circuit 25.

Next, the operation and action of the above configuration will be described. When the present vacuum cleaner is used in a cordless state using the storage battery 14, the storage battery 14 is attached to the power supply unit 15, and then the outer lid 16 is attached and accommodated in the main body 1. When the main body switch 26 is operated to close the DC power supply circuit 25, the DC power supply boosting unit 8 boosts the electromotive voltage 24V of the storage battery 14 to 54V, and the suction power performance of about 100W can be exhibited and used.

On the other hand, when using with a household AC power source,
Remove the outer lid 16 and remove the storage battery 14, power cord 1
After fitting the female connecting portion 18 of No. 7 into the connecting concave portion 19 and then reattaching the outer lid 17 and inserting the connecting plug 21 into a household AC power outlet, the AC switching circuit 28 operates by the action of the circuit switching device 28. Is configured, the body switch 26
When turned on, the suction performance of about 300 W can be exhibited and used.

That is, when the AC power supply for home use is used, the power cord 17 is fitted and connected to the connection recess 19 which appears after the storage battery 14 is removed from the main body 1. Therefore, the lightweight main body 1 without the storage battery 14 is laid around, and it can be used lightly.

The storage battery 14 is removed and the power cord 17
Since the configuration is such that the circuit switching device 28 is connected, it is not necessary to have a complicated drive power source circuit switching mechanism for preventing simultaneous use of the AC power source and the DC power source, and in the present embodiment, the circuit switching device 28 can automatically switch. However, it is possible to make the configuration more inexpensive by manually switching.

Next, the configuration, operation and action of the second and third means will be described. That is, the power supply unit 15 is formed at the rear end of the main body 1. The connection concave portion 19 is formed in a substantially trapezoidal shape (not shown) when viewed from above the power supply portion 15, and the female connection portion 18 is formed by bending approximately 90 degrees. As a result, when inserting the female connecting portion 18 into the connecting concave portion 19 or removing the female connecting portion 18 from the connecting concave portion 19, the operating direction of the female connecting portion 18 becomes substantially vertical to the floor surface, and the main body 1 moves horizontally. You can easily do it without worrying about.

Further, the direction of pulling out the power cord 17 is the rearward direction of the main body 1, the bending of the power cord 17 at the outlet portion of the outer lid 16 is relieved, and the disconnection does not occur, and good durability is obtained. Furthermore, since the power supply 15 and the connection recess 19 are located at the rear end of the main body 1, the power cord 1 to be used
7 lengths can be used to the maximum extent.

Next, the configuration, operation and action of the fourth means will be described. That is, 29 is a holding rib formed on the power source side of the outer lid 16, and is formed so as to fit with the stop groove 30 formed in the female connecting portion 18 of the power cord 17.

In this structure, even if the power cord 17 is stretched by moving and pulling the main body 1, the combination of the pressing rib 29 and the stop groove 30 supports the tension, so that the connecting terminal 20 is tensioned. Does not work,
Therefore, it is possible to prevent the disconnection of the power cord 17 and the contact abnormality of the connection terminal 20 when the household AC power source is used, and the durability is improved.

[0027]

As described above, according to the first means of the present invention, when a vacuum cleaner is used with a household AC power source, a heavy battery is removed from the main body. , The body can be pulled around lightly. In addition, since the storage battery is removed and the connection cord is connected, it is not necessary to use AC power supply and DC power supply at the same time, and a complicated drive power supply circuit switching mechanism is required to select one of these power supplies selectively. As a result, the electric vacuum cleaner can be provided at low cost.

According to the second means, the length of the power cord to be used can be utilized to the maximum extent, and high durability against disconnection at the outlet of the power cord can be obtained.

Further, according to the third means, the cord connecting portion of the power cord is formed by bending approximately 90 degrees, so that the power cord can be easily attached to the cord connecting portion and detached from the cord connecting portion. You can do it.

Further, according to the fourth means, by forming a pressing rib for holding the cord connecting portion of the power cord on the outer lid which is detachably held on the main body by covering the power source portion,
The durability of the power cord can be further extended.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a dual-purpose electric vacuum cleaner showing an embodiment of the present invention.

FIG. 2 is a diagram showing a state in which the electric vacuum cleaner is used when a DC power supply circuit is used in the embodiment.

FIG. 3 is a perspective view of a power cord outlet when the AC power supply circuit of the embodiment is used.

FIG. 4 (a) is a perspective view showing a main part of a power cord attachment portion and an outer lid of the dual-purpose electric vacuum cleaner according to the embodiment. FIG. 4 (b) is a perspective view showing an end portion of the power cord.

FIG. 5 is an electric circuit diagram of the dual-purpose electric vacuum cleaner showing the same embodiment.

[Explanation of symbols]

 1 Main Body 6 Dust Collection Room 7 Electric Blower 8 DC Power Supply Booster Unit 9 Drive Chamber 14 Storage Battery 15 Power Supply Section 16 Outer Lid 17 Power Cord 18 Female Connection Section 19 Connection Recess 29 Retaining Rib 30 Stop Groove

Claims (4)

[Claims] 1. A dust collection chamber for accumulating the absorbed dust, a drive chamber containing an electric blower and a control circuit for controlling the electric blower, and a storage battery for supplying a direct current to the electric blower at a side or a rear side of the drive chamber. A reversible electric vacuum cleaner, comprising: a power supply unit that detachably holds the battery, and a cord connection unit that supplies household AC power to the power supply unit. 2. The electric vacuum cleaner according to claim 1, wherein the power source is located at a rear end of the main body, and a power cord for supplying AC power is pulled out in a rearward direction of the main body. 3. The electric vacuum cleaner according to claim 1 or 2, wherein the cord connecting portion of the power cord is bent by approximately 90 degrees. 4. The outer lid, which covers the power supply portion and is detachably held by the main body, has a fitting rib for holding the cord connecting portion of the power cord. Bi-directional vacuum cleaner as described.