JPH05111167A - Rechargeable cleaner - Google Patents

Abstract

PURPOSE:To provide a battery loaded rechargeable cleaner for general home use wherein an insulating transformer in a charging block is protected against failure such as burning, by disposing an auxiliary switch interlocked with the charging block in the cleaner body thereby blocking operation of motor fan during charging operation. CONSTITUTION:An auxiliary switch 51 interlocked with a charging block 1 is disposed in a rechargeable cleaner body while being connected in series with a main switch 22 in order to block an excessive current, higher than a charging current, from flowing into an insulating transformer 7 mounted in a charging block during charging operation. Since a motor fan 17 can not be operated during charging operation even if the main switch 22 is turned ON, excessive current higher than the charging current will not flow into the insulating transformer 7 mounted in the charging block and thereby failure such as burning of transformer can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a general household rechargeable vacuum cleaner having a built-in storage battery.

[0002]

2. Description of the Related Art As known examples closest to the present invention, there are JP-A-62-120829 and JP-B-33736.

In these conventional rechargeable vacuum cleaners, the main circuit of the electric blower and the battery, the charging stand and the charger (charging control circuit) and the charging circuit of the battery are independent of each other, and the rechargeable vacuum cleaner is independent. The battery can be charged regardless of whether the main switch is turned on or off by joining the main unit to the charging base or connecting the charger plug to the insertion port of the main unit.

On the other hand, this type of charging stand or charger is equipped with an AC 10
The configuration is such that an input of 0V is an output of DC 7V. Therefore, at least in the charging stand and charger,
An isolation transformer and a semiconductor that converts alternating current to direct current, such as a diode, are provided.

[0005]

In the above configuration,
You may forget to turn off the main switch and charge the battery while it is on. In this state, an excessive current larger than the charging current flows through the charging stand or the charger, which causes the charging stand or the charger to fail.

Particularly, in the conventional example of Japanese Patent Application Laid-Open No. 62-120829, when a rechargeable vacuum cleaner is installed on a charging stand and charging operation of a storage battery in the rechargeable vacuum cleaner is started with the main switch turned on, Due to the heat generated by the insulating transformer and the semiconductor, the insulating transformer of the charging stand is burned and the charging case becomes hot.

On the other hand, Japanese Utility Model Publication No. 2-33373 has been proposed as a means for preventing an excessive current more than the charging current from flowing through the charging stand or the charger during charging. In this conventional example, the switch terminal is used. Details such as what works with are not described.

[0008] It is an object of the present invention to provide a rechargeable vacuum cleaner which is free from failure such that the insulating transformer is not burned and the charging case does not become hot.

[0009]

In the rechargeable vacuum cleaner according to the present invention, an auxiliary switch electrically connected in series with the main switch is provided in the main body at the junction between the main body of the cleaner and the charging stand. The auxiliary switch is turned off when the main body and the charging stand are joined, and the electric blower cannot be operated even if the main switch is turned on.

[0010]

In the present invention, when the main body of the rechargeable vacuum cleaner is placed and joined to the charging stand, the auxiliary switch electrically connected in series with the main switch is turned off and the electric blower cannot be operated. Therefore, an excessive current larger than the charging current does not flow in the insulating transformer of the charging stand.

[0011]

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

2 to 4, a charging stand 1 includes a charging case 2 made of a synthetic resin such as polypropylene,
The charging case 2 has a bottom cover 3 integrally attached to the bottom surface and made of synthetic resin such as polypropylene.

On the upper surface of the charging case 2, side surface upright portions 4 and 4a are formed along both side surfaces, and a rear upright portion 5 is formed at a rear side thereof to form a recess 6 for mounting a device requiring charging. Form.

The rising heights of the side rising parts 4 and 4a are gradually increased toward the rear rising part 5. An insulating transformer 7 is housed inside the rear rising portion 5. On the upper surface 5a of the rear rising portion 5, there is a suction port 8 with a brush.
The ring-shaped fitting groove 5b and the fitting protrusion 5c for installing the are formed. The outer peripheral wall 5d of the rear rising portion 5 is curved. A locking projection 9 is integrally formed on the inner peripheral wall 5e of the rear rising portion 5.

A charging terminal block 10 is integrally formed on the front portion of the recess 6. In the rear part of the recess 6, an escape groove 11
And a first mounting hole 11a.

The terminals 10a and 10b of the charging terminal block 10 are
It is connected to the secondary side of the insulating transformer 7 via a lead wire.

The bottom cover 3 has a gap suction port 12 in front thereof.
The fitting protrusion 3a for mounting is integrally provided. Bottom cover 3
A plurality of hooks 1 around which the cord 13 is wound around the bottom of the
4, 14a, 14b, 14c are integrally provided. At the center of the back surface of the bottom cover 3, the cord 13 is provided with an insulating transformer 7.
A circular opening 3b is provided for connecting to the primary side.
A curved surface portion 3c is formed on the entire circumference of the edge portion of the opening 3b. Code 1
A plug 15 for connecting to a power source of 100 V AC is provided at the tip of 3.

At the edge of the back surface of the bottom cover 3, the rising edge portion 3 is provided.
d is provided. The rising height dimension of the rising edge portion 3d is the hook 1
It is set to be larger than the rising height dimension of 4, 14a, 14b and 14c. A mounting hole 3e is provided on the back surface of the bottom cover 3 at a position facing the first mounting hole 11a of the charging case 2.

A second mounting hole 5f is provided in front of the recess 6 of the charging case 2. The bottom cover 3 is provided with a mounting hole 3f at a position facing the second mounting hole 5f of the charging case 2.

An example of equipment installed on the charging stand 1 is shown in FIG.
5 to 7. In this drawing, a rechargeable cleaner 16 is a cleaner body case 1 having a built-in electric blower 17.
8 and a dust case 19 detachably attached to the main body case 18. In the dust case 19,
A filter device 20 is provided. The filter device 20 is
It is provided with a filter 20a such as a non-woven fabric, a synthetic resin support frame 20b that supports the filter in a substantially box shape, and a rubber packing 20c fixed to the open end edges of the support frame 20b and the filter 20a. Packing 2
A handle 20d for pulling out the filter device 20 from the dust case 19 is integrally formed at 0c. The handle 20d projects inward of the filter 20a. When the dust case 19 and the body case 18 are joined together, the backing 20c is provided with a joining surface 18 on the body case 18 side.
It has a lip that abuts on a and a lip that abuts on the inner wall of the dust case 19, and by these both lips, airtightness between the dust case 19 and the filter device 20 and between the dust case 19 and the main body case 18 are provided. It is designed to maintain airtightness.

A suction port 19a is formed at the tip of the dust case 19. A valve 19b made of an elastic member is integrally formed on the inner wall of the dust case 19 at the suction port 19a.
It is attached using the individual mounting legs 19c. Dust case 1
9 and the body case 18 are detachably attached by a clamp device 21. The clamp device 21 includes a locking piece 21b rotatably provided around a shaft 21a provided on an upper surface of the dust case 19, a locking claw 18b formed on a coupling surface 18a of the body case 18, and the locking claw. A spring 50 that imparts a biasing force to rotate the locking piece 21b in the direction of locking 18b.
Is equipped with. A locking protrusion 19d is provided below the opening of the dust case 19. A receiving portion 18c that receives the locking protrusion 19d is provided below the coupling surface 18a of the main body case 18. A lattice-shaped inlet port 18d is provided in the central portion of the coupling surface 18a of the main body case 18.

The handle portion 1 is provided on the upper surface of the main body case 18.
8e is formed. A manual switch 22 that is a main switch for starting and stopping the electric blower 17 is provided on the upper surface of the main body case 18 in the vicinity of the handle portion 18e.

The body case 18 is constructed so that it can be divided into two parts, left and right. A room 18f for accommodating the storage battery 23 such as a sealed lead battery is formed in the lower part of the main body case 18. One printed circuit board 24 is provided above the room 18f. The printed circuit board 24 includes a diode or a diode stack 25 for converting alternating current into direct current.
Install a resistor 26 or the like. The storage battery 23 is put into and taken out of the room 18f by removing the lid 27 provided on the lower portion of the rear wall of the main body case 18.

The light emitting diode 28 for the display lamp is installed in the main body case 18 so that it can be seen from the upper surface of the main body case 18. On the bottom of the body case 18,
A recess 18g into which the charging terminal base 10 of the charging stand 1 is fitted is formed, and terminals 29 and 29a are provided in the recess 18g.
The terminals 29 and 29a are connected to the storage battery 23 and the diode 2
5 as shown in FIG.

The joint surface between the main body case 18 and the dust case 19 is inclined so that the locking claw 18b is located in front of the receiving portion 18c. Rear surface 18h of body case 18
Stands up at an angle of approximately 90 ° with respect to the bottom surface of the body case 18. On the rear surface 18h of the main body case 18, a hemispherical protrusion 18i that engages with the engagement protrusion 9 provided on the bottom cover 3 of the charging stand 1 is provided.

As shown in FIG. 5, the uppermost end of the brush suction port 8 is located below the uppermost surface of the rechargeable cleaning device 16 when the rechargeable cleaning device 16 and the brush suction port 8 are installed on the charging stand 1. To do. The brush suction port 8 is located inward of the rear portion of the charging stand 1.

As shown in FIG. 5, the tip of the gap suction port 12 projects forward from the tip of the rechargeable vacuum cleaner 6 when the rechargeable vacuum cleaner 6 and the gap suction port 12 are installed on the charging stand 1. ing.

The electric blower 17 comprises a motor 17a and a fan 17b rotated by the motor 17a. The exhaust flow from the fan 17b is supplied to the exhaust ports 3 provided on the left and right side surfaces of the main body case 18 after cooling the motor 17a.
Eject from 0. The exhaust port 30 is provided at a position close to the left and right side portions of the motor 17a. Ribs 31 and 32 are provided in the main body case 18 to ensure that the exhaust flow from the fan 17b is exhausted from the exhaust port 30.
To form. The outer circumference of the fan 17b of the electric blower 17 is
It is press-fitted and supported by the mounting rib 35 via the packing 34.

The brush suction port 8 and the gap suction port 12 have a fitting force that does not cause a spontaneous drop from the charging stand 1, and the fitting protrusion 5c.
Alternatively, it is attached to the fitting protrusion 3a.

As shown in FIG. 4, screws 36 and 36a for fixing the charging base 1 to the indoor wall are provided on the back surface of the bottom cover 3 of the charging base 1. The display plates 37 and 38 are provided in the recess 6 of the charging case 2 of the charging stand 1. A recess 39 for guiding the cord 13 is formed in a part of the rising edge portion 3d of the bottom cover 3. The recess 39 is curved so that the cord 13 is not damaged. The charging case 2 and the bottom cover 3 are integrated by screws 40, 40a, 40b, 40c.

The isolation transformer 7 has an AC 100V on the primary side.
Is applied, and the number of coil turns on the primary side and the secondary side is set so that an alternating current of 7.1 V is extracted from the secondary side. A nylon copper wire is used for the primary winding. Polyurethane copper wire is used for the secondary winding.

When the charging terminal block 10 of the charging stand 1 is fitted into the concave portion 18g of the rechargeable vacuum cleaner 16 and the hemispherical protrusion 18i is locked to the locking protrusion 9, the rechargeable vacuum cleaner 16 is charged. It is fixed in the recess 6 of the table 1.

When the rechargeable vacuum cleaner 16 is placed on a table, the bottom surface of the main body case 18 of the rechargeable vacuum cleaner 16 is
A protruding portion 18k is provided for maintaining the horizontal state of the rechargeable vacuum cleaner 16 without tilting.

Next, the auxiliary switch 51 will be described with reference to FIGS.
It will be described in detail with reference to FIG. Reference numeral 10c is a small columnar or small prismatic projection provided on a part of the charging terminal block 10, and 51 is an auxiliary switch such as a microswitch having an actuator 51a.

In the actuator 51a, when the projection 10c hits and operates, the normally closed internal contact opens (cuts).

The auxiliary switch 51 is used for the terminal 2 in the recess 18a.
It is fixed by inserting support holes 51b into two support pins 52a inside the terminal block 52 for holding 9, 29a.

Two pairs of terminals 10a of the charging terminal block 10,
At the same time when the terminals 29, 29a in the recess 18a come into contact with 10b, the projection 10c hits the actuator 51a of the auxiliary switch 51, and the normally closed contact in the auxiliary switch 51 is inverted and turned off.

Manual changeover switch 2 which is a main switch
2 and the auxiliary switch 51 form an electrically serial circuit, and the motor 17a of the electric blower 17 does not rotate when either switch is turned off.

10 to 12 show another embodiment. In the example of FIG. 10, the movable contact piece 53 is moved by the charging terminal block 10.
a operates and is electrically connected in series with a motor 17a that is an electric blower 17. 54a and 54b are contact pieces 53
It is a lead wire for a and 53b. 55 is a magnet, and 56 is a proximity switch operated by the magnet 55. Of course, the proximity switch 56 also constitutes a circuit electrically connected to the manual switch 22 which is the main switch.

In the above configuration, the manual switch 22 which is the main switch is set to the "off" state (not necessarily in the "off" state), and the rechargeable vacuum cleaner 16 is installed on the charging stand 1. Then, when the plug 15 is connected to a power source of 100 V AC, about 7 V DC is applied to the storage battery 23 in the rechargeable cleaner 16 by the insulating transformer 7 and the diode (diode stack) 25, and the charging work of the storage battery 23 is performed. To do. The light emitting diode 28 lights up while this charging operation is being performed.

Next, when the charging work is completed, the charging stand 1
After removing the rechargeable vacuum cleaner 16 from the above, when the manual changeover switch 22 which is the main switch is set to the "ON" state, the electric blower 17 is rotated and the cleaning work is started. In the cleaning work, after the dust is sucked into the dust case 19 from the suction port 19a of the dust case 19, the dust is removed by the filter device 20 in the dust case 19.
This is done by collecting dust inside. The exhaust flow passing through the filter device 20 passes through the fan 17b and the motor 17
It is discharged from the exhaust port 30 while cooling a.

To mount the charging stand 1 on the wall, screws 36,
36a is screwed into the wall using the first mounting hole 11a and the second mounting hole 5f. Even when the charging stand 1 is attached to the wall, the tip of the gap suction port 12 projects from the tip of the rechargeable vacuum cleaner 16, so that the user can easily attach and detach the gap suction port 12 to the bottom cover 3 by gripping the projecting portion. It can be performed.

During the charging operation, the insulating transformer 7 and the diode 25 generate heat, but the diode 25 is located on the printed circuit board 24 of the rechargeable vacuum cleaner 16 and the insulating transformer 7 is inside the rear rising portion 5 of the charging stand 1. Since it is located in the charging station, the charging station 1
The charging case 2 is not heated to a high temperature. Moreover, since the insulating transformer 7 is arranged in the rear rising portion 5 of the charging stand 1 capable of taking a large outer surface, the insulating transformer 7
The heat generated from can be efficiently dissipated. Therefore, even if the user touches the charging stand 1, the charging stand 1 is not heated to such an extent that the user feels uncomfortable.

In this embodiment, the electronic parts such as the diode 25 are mounted on the single printed board 24, so that the collective wiring is possible and the reliability and the productivity are improved.

Further, as in this embodiment, the charging case 2 is provided with a recess 6 on the upper surface thereof on which the rechargeable vacuum cleaner 16 is placed.
Moreover, when the rear rising parts 5 are provided at the rear parts, respectively, when the charging stand 1 is attached to the wall, the rechargeable vacuum cleaner 16 is provided.
Can be brought close to the wall, and the charging stand 1 and the rechargeable vacuum cleaner 16 can be held on the wall in a stable state.

In the present embodiment, the coupling surface between the dust case 19 and the main body case 18 has a locking claw 18b rather than the receiving portion 18c.
Is inclined so as to be located in the front, the work of removing the dust case 19 from the main body case 18 can be easily performed.

In this embodiment, the brush suction port 8 is located below the uppermost end of the main body case 18 and inward of the rearmost portion of the charging base 1, so that the brush suction port 8 is attached to the charging base 1. Moreover, even when the rechargeable vacuum cleaner 16 is attached / detached to / from the charging stand 1 with the charging stand 1 mounted on the wall, the work can be carried out without being disturbed by the brush suction port 8. Easy to use.

In this embodiment, since the exhaust port 30 is located outside the motor portion 17a of the electric blower 17, the motor portion 17a can be efficiently cooled by the exhaust flow. Further, since the printed circuit board 24 is located at a position separated from the exhaust passage 33 by the ribs 31 and 32, the printed circuit board 24 is not contaminated by the exhaust flow.

Since an excessive current larger than the charging current of the battery does not flow in the insulating transformer, burning of the insulating transformer does not occur.

[0050]

According to the present invention, there is no concern that the insulation transformer will be burnt out during the charging operation of the storage battery in the rechargeable vacuum cleaner, and it is not possible for the user to directly touch the charging stand during or after the charging operation. You can get a rechargeable vacuum cleaner that is extremely easy to use without feeling any pleasure.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram showing an embodiment of the present invention.

FIG. 2 is a top view of a charging stand.

FIG. 3 is a side view of the charging stand.

FIG. 4 is a bottom view of the charging stand.

FIG. 5 is an enlarged cross-sectional view of a main part in a state where the rechargeable vacuum cleaner is installed on the charging stand.

FIG. 6 is a top view of the rechargeable vacuum cleaner installed on a charging stand.

FIG. 7 is a development structure diagram of a rechargeable vacuum cleaner and a charging stand.

FIG. 8 is an enlarged central cross-sectional view of a main part in a state where the cleaner body case is not installed on the charging stand.

FIG. 9 is an enlarged central cross-sectional view of a main part in a state where the cleaner body case is installed on the charging stand.

FIG. 10 is a sectional view corresponding to FIG. 8 in another embodiment.

FIG. 11 is a sectional view corresponding to FIG. 9 in another embodiment.

FIG. 12 is a sectional view corresponding to FIG. 9 in yet another embodiment.

[Explanation of symbols]

1 ... Charging stand, 7 ... Insulation transformer, 17 ... Electric blower, 2
2 ... switch, 23 ... storage battery, 25 ... diode, 51
… Auxiliary switch.

Claims (4)

[Claims] 1. A main body, an electric blower, a battery, a main switch for turning on / off the electric blower, and a charging stand for charging the battery, wherein a main switch and an electrical switch are provided at a joint between the main body and the charging stand. A rechargeable battery characterized in that an auxiliary switch connected in series to the main body was installed in the main body, and the auxiliary switch was turned off when the main body and the charging stand were joined, and the electric blower could not be operated even if the main switch was turned on. Vacuum cleaner. 2. The rechargeable vacuum cleaner according to claim 1, wherein the joint portion between the main body and the charging stand is formed in an uneven shape, and an auxiliary switch is provided in the main body. 3. The rechargeable vacuum cleaner according to claim 2, wherein an auxiliary switch such as a normally-closed micro switch that operates corresponding to a convex portion or a concave portion of the charging stand is provided in the main body. 4. The rechargeable vacuum cleaner according to claim 2, wherein an auxiliary switch such as a proximity switch that operates corresponding to a convex portion or a concave portion of the charging stand is provided inside the main body.