JPS6360670B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an upright vacuum cleaner provided with a relay for switching connection between low voltage side operation and high voltage side operation of an electric blower.

[Conventional technology]

In general, upright-type vacuum cleaners have a main body case that can be tilted freely relative to the suction case, and the main body case may be folded down and used close to the floor, etc. At that time, the cord pulled out from the cord reel moves. The cord reel is placed in the upper part of the main body case to prevent the cord from getting tangled in the wheels and to eliminate the need to bend down to pull the cord out of the cord reel. In addition, the heavy electric blower makes it easy to connect to the rotating brush inside the mouthpiece case, and
It is placed at the bottom of the main body case in order to lower the center of gravity of the entire vacuum cleaner and increase operational stability. Therefore, the dust collection chamber of the main body case is located between the cord reel chamber and the drive chamber.

On the other hand, the upright vacuum cleaner particularly has the following features:
For export, a device that can be used in both areas that use high voltage power supplies of 220V to 240V and areas that use low voltage currents of 110V to 127V is required. Attempts have been made to provide a relay that switches the connection to the side drive.

[Problem to be solved by the invention]

In the above upright type vacuum cleaner, the lead wire for electrical connection between the cord reel side provided in the cord reel chamber and the electric blower side provided in the drive chamber is connected to the dust collection chamber between the cord reel chamber and the drive chamber. It has the disadvantage of being long because of the

Furthermore, when the upright vacuum cleaner is provided with a relay that switches the connection between low voltage side operation and high voltage side operation of the electric blower, the electrical connection between the relay and the electric blower is made through at least two lines. A high-voltage side lead wire and two low-voltage side lead wires are required, and in addition, a power supply lead wire and a noise prevention capacitor are connected to the relay for electrical connection between the cord reel, the relay, and the electric blower. This requires a lead wire, which has the disadvantage of increasing the amount of lead wire used and complicating the wiring work of the lead wire inside the main body case.
Additionally, in order to prevent insulation deterioration of the relay, new measures are required to keep the temperature of the relay below a specified temperature.

An object of the present invention is to solve the above-mentioned problems, and even if a relay for switching the connection between low voltage side operation and high voltage side operation of the electric blower is provided inside the main body case, the temperature of the relay To provide an upright type vacuum cleaner capable of suppressing the rise of the vacuum cleaner and reducing the amount of lead wires used by installing a relay.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention includes a mouthpiece case provided with moving wheels, provided tiltably with respect to the mouthpiece case, and a driving chamber which is opened from below inside the mouthpiece case.
A main body case that is divided into a dust collection chamber and a cord reel chamber in that order, a rotating brush provided in the suction case, an electric blower provided in the drive chamber and serving as a driving source for the rotating brush, and the cord reel. A guide passage is formed in the main body case, comprising a cord reel provided in the chamber and an operating handle provided at the upper end of the main body case, and guiding the exhaust flow of the electric blower from the drive chamber to the cord reel chamber. In addition, a relay for switching the connection between low voltage side operation and high voltage side operation of the electric blower is disposed near the entrance of the guide passage in the drive chamber, and furthermore, a relay that switches the connection between low voltage side operation and high voltage side operation of the electric blower is disposed near the entrance of the guide passage, The present invention is characterized in that a power supply lead wire for electrical connection with the relay is wired within the guide passage.

[Effect]

According to the above means, when the electric blower is rotated, the exhaust flow from the electric blower flows through the guide passage to the cord reel guide, and the cord reel side, the electric blower and the relay arranged in the guide passage are connected. Temperature rise of the power supply lead wire and cord reel for electrical connection is suppressed.

Since the relay is disposed near the entrance of the guide passage into which the exhaust flow of the electric blower strongly flows, the relay is effectively suppressed by the exhaust flow and the temperature can be kept below the specified temperature. Moreover, the number of lead wires increases. For the electrical connection between the relay side and the electric blower side, since the relay is disposed within the drive chamber, the relay is located close to the electric blower, and the amount of lead wires used can be reduced.

Furthermore, long lead wires are required. Electrical connection between the cord reel side of the cord reel chamber and the electric blower side of the drive line is achieved by installing a relay in the drive chamber near the entrance of the guide passage, and connecting the two power supply leads from the cord reel. The number of wires and power supply lead wires for relays can be reduced, making wiring work easier and reducing the amount of lead wires used.

〔Example〕

Next, the present invention will be explained in detail with reference to drawings showing embodiments thereof.

In Fig. 1, an upright vacuum cleaner 1
consists of a main body case 2 and a mouthpiece main body 3. The main body case 2 consists of a cord reel chamber 5 that houses the cord reel 4, a dust collection chamber 7 that houses the dust collection bag 6, and a drive chamber 9 that houses the electric blower 8. The main body case 2 is configured to be tiltably attached to the mouthpiece body 3 and to be able to stand upright on the mouthpiece body 3 when not in use.

In the main body case 2, a driving chamber 9 is disposed at a position close to the suction body 3, and a dust collection chamber 7 and a cord reel chamber 5 are disposed at a position far from the suction body 3 in this order.

A rotating brush 10 is provided inside the mouthpiece body 3.
A part of the rotating brush 10 is attached to the bottom plate 11 of the mouthpiece body 3.
It protrudes downward from the opening 11a. The rotating brush 10 is rotated by the power of the electric blower 8 being transmitted via the belt 12. The mouthpiece body 3 is provided with wheels 13 for movement.

Dust sucked in from the rotating brush 10 is guided to the dust collection bag 6 through a flexible hose 14. Most of the exhaust flow from the electric blower 8 flows outward from the lower part of the main body case 2. As shown in FIG. 2, a part of the exhaust flow from the electric blower 8 is guided into the cord reel chamber 5 by a guide passage 16 formed by the main body duct 15, etc. The cord 17 wound around the cord reel 4 flows outward from the upper part of the main body case 2 while being cooled. An operating handle 18 is provided at the top of the main body case 2.

One end of the guide passage 16 protrudes into the drive chamber 9, and the other end of the guide passage 16 protrudes into the cord reel chamber 5.

The electric circuit of the vacuum cleaner 1 is as shown in FIG. Two power supply cord wires 19a and 19b from the cord reel 4 and a power supply lead wire 21 for the relay 20 pass through the guide passage 16 and are connected to the relay 20 side. Electric blower 8
The field winding 22 includes high voltage side lead wires 22a, 2.
2b, and low voltage measurement lead wires 24a and 24b drawn out from the intermediate tap 23.
The high voltage side lead wires 22a, 22b and the low voltage side lead wires 24a, 24b are connected to the relay 20. The noise prevention capacitor 25 is connected to the lead wire 2
6 to the relay 20. A fuse 27 and a switch 28 are connected to the power supply lead wire 19b.

When the plug 29 of the cord 17 is inserted into an outlet in a low voltage area of about 110V to 127V, the sensitive voltage of the relay 20 (150V to 195V) is not reached, so the contact a side of the relay 20 is turned on. Then, the electric blower 8 operates at low voltage.

When the plug 29 of the cord 17 is inserted into an outlet in a high voltage area of about 220V to 240V, the relay 20 is activated, the contact b side of the relay 20 is turned on, and the electric blower 8 is operated at high voltage. .

As shown in FIGS. 1 and 2, the relay 20 is located near the entrance 16a of the guide passage 16 in the drive chamber 9.
to be placed.

In the above configuration, when the plug 29 is inserted into a power sensor in a high voltage area, the relay 20 is activated, the electric blower 8 is operated on the high voltage side, and the rotating brush 10 is rotated. The dust collected by the rotating brush 10 is collected into the dust collection bag 6 via the flexible hose 14 by the intake air flow of the electric blower 8.
When the predetermined cleaning work is completed, when the plug 29 is pulled out from the outlet, the relay 20 stops operating and the contact a side is turned on. In this state, when the plug 29 is inserted into an outlet in a low voltage area, the relay 20 does not operate, the electric blower 8 operates on the low voltage side, and the rotating brush 10 rotates.

In this way, the electric blower 8 and the rotating brush 10 can be operated without any problem whether the plug 29 is inserted into an outlet in a high voltage area or an outlet in a low voltage area.

Furthermore, in this embodiment, since the relay 20 is disposed on the side of the drive chamber 9 that houses the electric blower 8, the electrical wiring between the cord reel chamber 5 and the drive chamber 9 is a power supply lead wire. Only three wires, 19a, 19b and the power supply lead wire 21, are required, which simplifies the wiring work and reduces the amount of lead wires used.

A part of the exhaust flow of the electric blower 8 is routed through the guide passage 16.
, enters the cord reel chamber 5, and exits from the upper part of the main body case 2 to the outside. For this purpose, the relay 20, power supply lead wires 19a, 19b, 2
1 and cord reel 4 are cooled by the exhaust flow. In particular, since the relay 20 is disposed near the entrance 16a of the guide passage 16, it is effectively cooled by the exhaust flow. According to experiments, relay 20
It was confirmed that the angle could be kept below 65°.

〔Effect of the invention〕

As described above, according to the present invention, there is provided a suction case provided with moving wheels, which is provided to be tiltable with respect to the suction case, and whose interior is partitioned from the bottom into a drive chamber, a dust generation chamber, and a cord reel chamber. A main body case, a rotating brush provided inside this mouthpiece case,
An upright vacuum cleaner comprising: an electric blower provided in the drive chamber and serving as a drive source for the rotating brush; a cord reel provided in the cord reel chamber; and an operating handle provided at the upper end of the main body case. A guide passage for guiding the exhaust flow of the electric blower from the drive chamber into the cord reel chamber is formed in the main body case, and connection switching between low voltage side operation and high voltage side operation of the electric blower is performed. A relay is disposed near the entrance of the guide passage in the drive chamber, and a power supply lead wire for electrically connecting the cord reel side with the electric blower and the relay is wired inside the guide passage. Therefore, the power supply lead wire and relay that electrically connect the cord reel side and the electric blower and relay are cooled by the exhaust flow of the electric blower, and the temperature rise of the relay is kept below the specified temperature. The use of lead wires is not only safe, but also reduces the number of lead wires required for electrical connection between the cord reel side of the cord reel room and the electric blower side of the drive room, which otherwise requires long lead wires. The amount can be kept small.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with FIG. 1 being a longitudinal sectional view of the main part, FIG. 2 being a rear view of the main part, and FIG. 3 being an electric circuit diagram. 2... Body case, 3... Mouthpiece case, 4...
Cord reel, 5... Cord reel chamber, 7... Dust collection chamber, 8... Electric blower, 9... Drive chamber, 10...
...Rotating brush, 13...Movement wheel, 16...Guide path, 18...Operation handle, 19a, 19
b...Power supply lead wire, 20...Relay, 2
1...Lead wire for power supply.

Claims (1)

[Claims] 1. A mouthpiece case equipped with wheels for movement, a main body case that is tiltable relative to the mouthpiece case and whose interior is divided into a drive chamber, a dust collection chamber, and a cord reel chamber in this order from the bottom, and this mouthpiece case. an electric blower provided in the drive chamber and serving as a drive source for the rotating brush; a cord reel provided in the cord reel chamber; and an operating handle provided at the upper end of the main body case. A guide passage for guiding the exhaust flow of the electric blower from the drive chamber to the cord reel chamber is formed in the main body case, and a connection switch between low voltage side operation and high voltage side operation of the electric blower is provided. A relay for power supply is disposed near the entrance of the guide passage in the drive chamber, and a power supply lead wire for electrically connecting the cord reel side with the electric blower and the relay is placed in the guide passage. An upright vacuum cleaner characterized by being wired.