JPH0670864A - Rechargeable vacuum cleaner - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention reduces the adverse effect on the storage battery due to the heat generation of the circuit board, prolongs the life of the storage battery, and prevents the outer casing of the storage battery from swelling and the main body case from being deformed due to temperature rise. It is a thing. A storage battery and a circuit board for charging the storage battery are arranged to face each other, and a heat shield plate for blocking heat generation of the circuit board is provided between the storage battery and the circuit board, and two air layers are provided. As described above, the adverse effect on the storage battery due to the heat generation of the circuit board is reduced and prevented. [Effects] According to the present invention, a rechargeable vacuum cleaner capable of preventing adverse effects on a storage battery due to heat generation of a circuit board and extending the life of the storage battery and preventing blistering of the storage battery exterior and deformation of the main body case due to temperature rise is provided. To be

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 The closest known examples to the present invention are Japanese Utility Model Publication No. 2-33736, Japanese Patent Publication No. 3-60255, and Japanese Patent Publication No. 3-7.
There is a publication such as 3284.

In these conventional rechargeable vacuum cleaners, a storage battery and a circuit board for charging the storage battery are arranged adjacently or in close proximity to each other. Particularly, when the main body is downsized, the storage battery and the circuit are provided. The circuit board and the circuit board are arranged so as to face each other, and the heat generated by the circuit board directly affects the storage battery. A heat shield plate or the like is provided between the storage battery and the circuit board to block the heat generated by the circuit board. Not at all. Therefore,
In the case of the publication, the curve I of FIG.
The temperature rises as shown in.

As known examples close to the present invention, Japanese Utility Model Publication 2-28857, Japanese Utility Model Publication 3-35254, and Japanese Utility Model 3-5.
There are also 4683, Japanese Patent Publication No. 2-51334, Japanese Patent Publication No. 3-74094.

[0005]

In the above-mentioned conventional example, the heat generated from the circuit board directly affects the storage battery during charging, which shortens the life of the storage battery or causes the plastic exterior of the storage battery to swell. This may be inconvenient and the plastic body case may be deformed.

The storage battery is a component that utilizes a chemical reaction, and although it is a component that also generates heat from inside the storage battery (mainly due to the heat of the chemical reaction and heat generation due to internal resistance), in addition to that, it also heats from near the storage battery. Then, the temperature rise is further accelerated and the storage battery is adversely affected. And
A rechargeable vacuum cleaner repeats charging and discharging.In addition to the heat generated from the inside of the storage battery, heating from near the storage battery shortens the service life due to temperature rise, causes the exterior of the storage battery to blister, and deforms the main body case. It further promotes the adverse effects such as

On the other hand, if the storage battery swells, it becomes impossible to take it out of the main body to the outside.

The present invention provides a rechargeable vacuum cleaner capable of preventing the storage battery from being adversely affected by the heat generated from the circuit board, extending the life of the storage battery, and preventing the exterior of the storage battery from bulging or the main body case being deformed due to a temperature rise. The purpose is to do.

[0009]

The above object is to provide a rechargeable vacuum cleaner having a circuit board for charging a storage battery,
This is achieved by disposing the storage battery and the circuit board so as to face each other and providing a heat shield plate that blocks heat generation of the circuit board between the storage battery and the circuit board.

[0010]

In the present invention, a heat shield plate for blocking heat generation of the circuit board is provided between the storage battery and the circuit board to prevent the heat generation of the circuit board from adversely affecting the storage battery and to extend the life of the storage battery. This is to prevent blistering of the storage battery and deformation of the main body case due to temperature rise.By installing a heat shield plate between the storage battery and the circuit board to block the heat generation of the circuit board, it is a conventional air layer. In this configuration, the heat generation of the circuit board is less likely to affect the storage battery by constructing two or more air layers. Moreover, the two or more air layers can be simply and inexpensively formed, and the heat generated by the circuit board is less likely to affect the storage battery.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment 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,
A bottom cover 3 integrally attached to the bottom surface of the charging case 2 and made of synthetic resin such as polypropylene is provided.

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, thereby forming 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 are formed. The outer peripheral wall 5d of the rear rising portion 5 is curved. A locking protrusion 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 on the bottom surface of the
4, 14a, 14b and 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.
The 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 a rechargeable vacuum cleaner installed on the charging stand 1 is shown in FIGS. 1 and 5 to 7. In this drawing, the rechargeable vacuum cleaner 16 includes a main body case 18 in which an electric blower 17 is incorporated, and a dust case 19 detachably attached to the main body case 18. A filter device 20 is provided in the dust case 19. Filter device 20
Is a filter 20a such as a non-woven fabric, and a synthetic resin support frame 20b that supports the filter 20a in a substantially box shape.
And a rubber packing 20c fixed to the opening edge of the support frame 20b and the filter 20a. The packing 20c is integrally formed with a handle 20d for pulling out the filter device 20 from the dust case 19. The handle 20d projects inward of the filter 20a. The backing 20c is a dust case 19
When the main body case 18 and the main body case 18 are joined together, it has a lip that abuts on the joining surface 18a on the main body case 18 side and a lip that abuts the inner wall of the dust case 19. The airtightness between the dust case 19 and the main body case 18 is maintained. The body case 18 and the dust case 19 are usually made of synthetic resin such as ABS resin.

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.
Attach 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 which rotates around a shaft hole 21a provided on the upper surface of the dust case 19, a locking claw 18b formed on the coupling surface 18a of the body case 18, and a locking claw 18b. The spring 50 is provided to apply a biasing force to rotate the locking piece 21b in the locking direction.

A locking projection 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. In the central portion of the coupling surface 18a of the main body case 18,
A lattice-shaped inlet 18d is provided.

The handle portion 1 is provided on the upper surface of the main body case 18.
8e is formed. A manual changeover switch 22 which 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 portion of the main body case 18. A printed circuit board 24, which is a circuit board for charging the storage battery 23, is provided above the room 18f. A printed circuit board 24, which is a circuit board, is provided with a diode or diode stack 25, a resistor 26, etc. for converting alternating current into direct current. The storage battery 23 is taken in and 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 exterior of the storage battery 23 is usually made of synthetic resin such as ABS resin having a heat resistant temperature of about 70 ° C.

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. In FIG. 5, DS1 is a diode stack, D1, D2, D3, D4 and D5 are diodes, ZD1, ZD2, ZD3 and ZD4 are zener diodes, CR1 and CR2 are thyristors, and Q.
1, Q2, Q3, Q4, Q5 and Q6 are transistors, IC1 and IC2 are integrated circuits, C1, C2, C3 and C4 are electrolytic capacitors, R1 to R13 and R15 to R
27 is a carbon resistance and R28 is a power type film resistance.

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 the 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 projection 18i that engages with the engagement projection 9 provided on the bottom cover 3 of the charging stand 1 is provided.

As shown in FIG. 1, 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. Further, the brush suction port 8 is located inward of the rear portion of the charging stand 1. The tip of the gap suction port 12 is
As shown in FIG. 1, in the state where the rechargeable vacuum cleaner 6 and the gap suction port 12 are installed on the charging stand 1, the rechargeable vacuum cleaner 6 projects forward from the tip end of the rechargeable vacuum cleaner 6.

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 periphery of the fan 17b of the electric blower 17 is
The mounting rib 35 is press-fitted and supported 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 are fitted with 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 stand 1 to the indoor wall are provided on the back surface of the bottom cover 3 of the charging stand 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 taken out from the secondary side. 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 recess 18g of the rechargeable vacuum cleaner 16 and the hemispherical projection 18i is locked to the locking projection 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 to maintain 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.

The actuator 51a is such that the normally closed internal contact opens (cuts) when the projection 10c is actuated.

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.

A pair 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 is the actuator of the auxiliary switch 51.
Upon hitting 51a, the normally-closed contact in the auxiliary switch 51 is inverted and turned off.

Manual switch 2 which is the 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 any switch is turned off.

Further, a printed circuit board 24 which is a circuit board
The heat shield plate 61 for shutting off the heat generation from will be described in detail with reference to FIGS.

The storage battery 23 and the printed circuit board 24, which is a circuit board, are arranged opposite to each other so that their respective planes face the other side. As a result, the rechargeable vacuum cleaner 16 can be downsized.

The heat shield plate 61 is provided between the storage battery 23 and the printed circuit board 24, and the storage battery 23 and the printed circuit board 2 are provided.
Printed circuit board 24 with one air layer between the two
This makes it difficult to transmit the heat generated by. When there are a plurality of heat shield plates 61, the air layer has a plurality of layers of three or more layers, which provides a further heat shield effect.

As the heat shield plate 61, a thin metal plate or the like may be used, but it is provided in a narrow space, and has an insulating property such as a vinyl chloride sheet or a polyethylene terephthalate film.
The printed circuit board 2 which is a circuit board is desirably composed of a thin plate material having one or both of heat resistance.
It is possible to prevent an electrical short circuit or the like even if it directly contacts 4. Insulation is a property required to prevent short circuits in electric circuits, and heat resistance is a property required to prevent thermal deformation and ensure heat insulation. The thin plate material is a property necessary for downsizing the rechargeable vacuum cleaner 16.

Between the storage battery 23 and the printed circuit board 24,
The heat shield plate 61 for blocking the heat generation of the printed circuit board 24 is provided, and the heat generation of the printed circuit board 24 is performed with respect to the storage battery 23 by forming one air layer in the past into two or more air layers. It has a thickness of 0.
Due to the presence of the heat shield plate 61 of polyethylene terephthalate film of about 2 mm, the temperature rise of the curve I shown in FIG. 11 becomes the temperature rise shown in the curve II, and the heat corresponding to the shaded area is regenerated every time charging and discharging are repeated. There is something that can be blocked. Moreover, it is possible to easily and inexpensively form two or more air layers so that the heat generation of the printed circuit board 24 hardly affects the storage battery 23.

The heat shield plate 61 may be provided between the storage battery 23 and the printed circuit board 24 on the side of the printed circuit board 24 facing the storage battery 23, or between the storage battery 23 and the printed circuit board 24 the partition plate of the main body case 18. When 18L is present,
As shown by the chain double-dashed line in FIG. 11, it may be provided between the storage battery 23 and the printed circuit board 24 on the side opposite to the printed circuit board 24 of the storage battery 23, and further, between the storage battery 23 and the printed circuit board 24. 24 on the side of the storage battery 23 facing and on the side of the storage battery 23 facing the printed circuit board 24,
Of course, each may be provided.

In the above construction, the manual switch 22 serving as 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 attach the charging stand 1 to 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 / detach the gap suction port 12 to / from the bottom cover 3 by gripping the projecting portion. It can be performed.

During the charging operation, the diode 25 and other electronic parts generate heat, but the diode 25 is located on the printed circuit board 24 which is the circuit board of the rechargeable vacuum cleaner 16, and is located between the storage battery 23 and the printed circuit board 24. Heat shield plate 6
As described above, the surface of the storage battery 23 is unlikely to be heated to a high temperature due to the synergistic effect of the two types of heat sources of self-heating of the storage battery 23 and heat generation of the printed circuit board 24 as in the conventional case. Moreover, since the printed circuit board 24 is arranged in the main body case 18 which can have a large outer surface, the heat generated from the printed circuit board 24 can be efficiently dissipated. Therefore, the temperature of the storage battery 23 does not rise more than necessary.

In this embodiment, the electronic components such as the diode 25 are mounted on the printed circuit board 24, which is a circuit board. Therefore, collective wiring is possible, and reliability and productivity are improved.

Further, as in the present embodiment, the charging case 2 is provided with the recess 6 on the upper surface of which the rechargeable cleaner 16 is placed.
In addition, when the rear stand 5 is provided at the rear, the rechargeable vacuum cleaner 16 is provided when the charging stand 1 is mounted on the wall.
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 connecting surface of the dust case 19 and the main body case 18 is inclined so that the locking claw 18b is located in front of the receiving portion 18c, so that the operation of removing the dust case 19 from the main body case 18 is performed. Easy to do.

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. It is easy to use.

In this embodiment, since the exhaust port 30 is located outside the motor section 17a of the electric blower 17, the motor section 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 storage battery 23 does not flow in the insulating transformer 7, the insulating transformer 7
It does not cause burnout.

Between the storage battery 23 and the printed circuit board 24,
Since the heat shield plate 61 for blocking the heat generation of the printed circuit board 24 is provided, two or more air layers can be formed, and the heat generation of the printed circuit board 24 hardly affects the battery 23. Moreover, the two or more air layers can be simply and inexpensively formed, and the heat generated by the printed circuit board 24 is less likely to affect the storage battery 23. In particular, heat is easy to convect to the upper side, and it is effective because the heat shield plate 61 is provided on the lower side of the printed circuit board 24 which is the heat source, that is, the side opposite to the storage battery 23.

[0055]

According to the present invention, the heat generated from the circuit board directly affects the storage battery during charging, which shortens the life of the storage battery and causes the inconvenience of bulging the plastic exterior of the storage battery. It is possible to prevent the deformation of the main body case made of plastic.

Moreover, it is possible to simply and inexpensively form two or more air layers so that the heat generation of the circuit board hardly affects the storage battery.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of a main part in a state where a rechargeable vacuum cleaner is installed on a charging stand, showing the embodiment of the present invention.

FIG. 2 is a top view of a charging stand showing the embodiment of the present invention.

FIG. 3 is a side view of the charging stand, showing the embodiment of the present invention.

FIG. 4 is a bottom view of the charging stand, showing the embodiment of the present invention.

FIG. 5 is an electric circuit diagram showing an embodiment of the present invention.

FIG. 6 shows an embodiment of the present invention, and is a top view of the rechargeable vacuum cleaner installed on a charging stand.

FIG. 7 is a developed structural view showing an embodiment of the present invention.

FIG. 8 shows an embodiment of the present invention, and is an enlarged central cross-sectional view of a main part in a state where it is not installed on a charging stand.

FIG. 9 shows an embodiment of the present invention and is an enlarged central cross-sectional view of a main part in a state of being installed on a charging stand.

FIG. 10 is an enlarged cross-sectional view of a main part of FIG. 2, showing an embodiment of the present invention.

FIG. 11 is a diagram showing an embodiment of the present invention and a temperature rise diagram showing the effect thereof with and without a heat shield plate.

[Explanation of symbols]

16 ... Rechargeable vacuum cleaner, 17 ... Electric blower, 18 ... Main body case, 19 ... Dust case, 22 ... Switch, 23 ... Storage battery, 24 ... Printed circuit board, 25 ... Diode, 61 ...
Heat shield plate.

Claims (5)

[Claims] 1. A rechargeable vacuum cleaner having at least an electric blower, a storage battery for driving the electric blower, and a circuit board for charging the storage battery, wherein the storage battery and the circuit board are provided. And a heat shield plate for blocking heat generation of the circuit board between the storage battery and the circuit board. 2. The rechargeable vacuum cleaner according to claim 1, further comprising a heat shield plate provided on the side of the circuit board opposite to the storage battery to block heat generated by the circuit board. 3. The rechargeable vacuum cleaner according to claim 1, wherein the heat shield plate is provided on a side of the storage battery facing the circuit board. 4. The rechargeable vacuum cleaner according to claim 1, wherein the heat shield plates are provided on a side of the circuit board facing the storage battery and on a side of the storage battery facing the circuit board, respectively. 5. The charging according to claim 1, wherein the heat shield plate is made of a thin plate material having at least one of insulation property and heat resistance such as vinyl chloride sheet and polyethylene terephthalate film. Vacuum cleaner.