JPS639851B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a central piping type vacuum cleaner that is equipped with a plurality of connection ports that are connected to a dust collection section installed at a specific location.

With this type of device, it is impossible to connect suction hoses to multiple connection ports and clean them all at once due to lack of power. In reality, connection ports other than those that are not used are closed with lids in preparation for a drop in wind power, but sometimes people clean using other connection ports without knowing the state in which the suction hose is connected, and in this case, they are not used. The disadvantage of this type of device is that it is not possible to prevent a drop in wind power because the connection ports are open at other locations.

This invention solves the above-mentioned drawbacks, and even when a suction hose is connected to a connection port, it prevents the wind power from decreasing when the air passage is closed and cleaning is performed using another connection port. The purpose is to create a vacuum cleaner that is capable of cleaning.

This invention provides a plurality of connection ports which are connected to a dust collecting section maintained in a negative pressure state by an electric blower through pipes and arranged at a plurality of installation locations, and which are connected to these connection ports. A remote control switch for controlling the drive circuit of the electric blower is provided at the proximal portion of the suction hose, a valve body is provided in the air passage at the proximal portion of the suction hose and is biased in a direction to close the air passage; An operating body for connecting the remote control switch and opening the valve body is provided at the proximal portion of the suction hose. Therefore, even if you forget to connect the suction hose to the connection port body, you will not forget to turn off the remote control switch.When you operate the operating body to turn off the remote control switch, the valve body will open the air path at the hand. This structure prevents leakage even when other connection ports are used, and prevents heating of the electric blower due to insufficient suction flow.

A first embodiment of this invention will be described based on FIGS. 1 to 3. Reference numeral 1 denotes a vacuum cleaner main body, and the vacuum cleaner main body 1 has a built-in electric blower (not shown) and a dust case 2 which is a dust collection section and houses a filter (not shown). 3 is an exhaust pipe. Next, connection ports 5 are installed on the first floor (1F) and second floor (2F) of the building, each connected to the dust case 2 through a conduit 4. A suction hose 7, extension pipes 8 and 9, and a suction tool 10 such as a floor brush are provided to these connection ports 5, which are connected in sequence by opening their lids 6. The suction hose 7 has a connecting pipe 11 to the connecting port body 5 at one end, and a grip pipe 13 which is a hand portion for holding a bent pipe 12 at the other end. Grip tube 13
A remote control switch 14 is provided. This remote control switch 1
4 is connected to remote terminals 16 and 17 provided in the connecting pipe 11 at the tip by a conductive wire 15 spirally embedded in the suction hose 7, pole by pole, as shown in FIG.
This forms a remote line 14a. Terminals 18 and 19 connected to these remote terminals 16 and 17 are provided in the connection port body 5. These terminals 18 and 19 are connected to the secondary side of a transformer 20 built into the vacuum cleaner main body 1 via conductive wires (not shown) extending along the conduit 4. The primary side of the transformer 20 and the electric blower 21 are connected in parallel to a power source 22, and the transformer 2 is connected between the power source 22 and the electric blower 21.
The drive circuit of the electric blower 21 is activated by the secondary voltage of 0.
A relay switch 23 is connected to turn it on.

The valve body 25, which opens when pushed by the ON direction movement of the switch knob 24 serving as the operating body of the remote control switch 14, is biased in the closing direction by a torsion spring (not shown) in the grip tube 13. It is mounted so that it can rotate freely.

In such a configuration, the lid 6 of any of the connection ports 5 is opened to connect the connection pipe 11 of the suction hose 7.
Insert. At this time, remote terminals 16, 17
are connected to terminals 18 and 19. Next, by turning on the remote control switch 14, the relay switch 23 is turned on by the secondary voltage of the transformer 20, and the electric blower 21 is driven. At this time, the valve body 25 opens the air passage by being pushed by the ON operation of the switch knob 24. Therefore, the connection port body 5 to be used does not continue its suction action with the air passage closed, making it possible to prevent the electric blower 21 from overheating due to insufficient suction flow. If you slide the switch knob 24 in the opposite direction, the relay switch 23 will turn OFF.
The valve body 25 is rotated in conjunction with the force of the torsion spring, and the sealing material 26 hermetically closes the air passage. Continuing to drive the electric blower 21 causes a lot of noise, and it is unlikely that the user will forget to continue driving the electric blower 21. Therefore, all you need to do is turn off the remote control switch 14, but the air passage is closed in conjunction with this, so if you forget that the suction hose 7 is connected to the connection port body 5, you can connect it to the other connection port. Even when the body 7 is used for cleaning, a decrease in wind power can be prevented.

Next, a second embodiment of the present invention will be described based on FIGS. 4 and 5. Components that are the same as those in the embodiment described above are designated by the same reference numerals, and description thereof will be omitted (the same applies hereinafter).
A valve body 29 having a knob 28 as an operating body projecting to the outside is rotatably attached to the grip tube 27 which is the proximal portion of the suction hose 7 while being biased in the closing direction by a torsion spring (not shown).
Further, a switch knob 30 is rotatably attached to the grip tube 27 while being biased upward. A remote control switch 33 is formed by a contact plate 31 provided with a fixed contact (not shown) fixed to the switch knob 30 and a movable contact 32 provided to the valve body 29. Fifth
As shown in the figure, an electromagnet 34 connected in series with the remote control switch 33 is fixedly provided within the grip tube 27. A magnetic material 35 is attached to a portion of the valve body 29.

In such a configuration, when the knob 28 is turned to the right, the valve body 29 is rotated in the opening direction. At this time, the contact between the contact plate 31 and the movable contact 32 closes the remote control switch 33, that is, the remote line 33a is turned on, and the electric blower 21
is driven, and during this time, the electromagnet 34 is also energized to attract the magnetic body 35 and maintain the valve body 29 in an open state.
Therefore, it is possible to prevent overheating and burnout accidents caused by continuing to drive the electric blower 21 with the air passage closed. After use, push the switch knob 30 downward to separate the contact plate 31 from the movable contact 32. That is, the remote control switch 33
It is turned off, and the energization to the electromagnet 34 is also cut off.
The valve body 29 closes the air passage by the force of the torsion spring. Therefore, as described in the previous example,
After use, the electric blower 21 is stopped, but the suction hose 7
When it is inserted into the connection port 5, the valve body 29 connected to the suction hose 7 always closes the air passage, thereby preventing a drop in the wind force when cleaning using another connection port 5. can do. Further, since the movable contact 32 is provided on the valve body 29, the structure of the remote control switch 33 can be simplified.

Since this invention is configured as described above, even if the suction hose is connected to one of the connection ports and forgotten, there is no need to forget to turn off the remote control switch. When the valve body is operated, the valve body closes the air passage at the hand, which prevents leaks when using other connection ports and prevents the electric blower from heating up due to insufficient suction flow. .

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view showing a first embodiment of the present invention, Fig. 2 is an enlarged vertical sectional side view showing the proximal portion of the suction hose, Fig. 3 is an electric circuit diagram thereof, and Fig. 4 is a perspective view of the first embodiment of the present invention. The figure is an enlarged longitudinal sectional side view of the proximal portion of a suction hose showing a second embodiment of the present invention, and FIG. 5 is an electric circuit diagram thereof. 2...Dust case (dust collection section), 4...Pipe line,
5... Connection port body, 7... Suction hose, 13... Grip tube (hand portion), 14... Remote control switch, 21... Electric blower, 25... Valve body,
27... Grip tube (hand portion), 24... Switch knob (operating body), 28... Knob (operating body), 29
...Valve body, 32...Movable contact.

Claims (1)

[Scope of Claims] 1. A plurality of connection ports are provided at a plurality of installation locations and are connected to a dust collecting section maintained in a negative pressure state by an electric blower through pipes, and these connection ports are provided with A remote control switch for controlling the drive circuit of the electric blower is provided at the proximal portion of the suction hose to be connected, and a valve body biased in the direction of closing the air passage is provided in the air passage at the proximal portion of the suction hose. An electric vacuum cleaner characterized in that an operating body is provided at a proximal portion of the suction hose for connecting the remote control switch and opening the valve body. 2. A plurality of connection ports are installed at multiple installation locations and are connected via pipes to the dust collection section maintained in a negative pressure state by an electric blower, and the suction hoses connected to these connection ports are A remote control switch for controlling the drive circuit of the electric blower is provided at the hand portion, and a valve body is provided in the air passage at the hand portion of the suction hose and is biased in a direction to close the air passage. A vacuum cleaner characterized in that an operating body for opening the valve body is provided at the hand portion, and a movable contact that contacts and separates from a fixed contact of the remote control switch is provided on the operating body.