JPS643496B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention comprises a vacuum cleaner body with a built-in electric blower, a plurality of pipes that transmit air flow and most of which are piped inside a house, and a vacuum cleaner provided at the end of each pipe. This invention relates to a central cleaner having a hose outlet and a cleaning hose (including an extension pipe and a floor suction port) attached to the hose outlet.

Traditionally, with this type of vacuum cleaner, it was not possible to connect the hose to two or more outlets at the same time, but in recent years, high-output vacuum cleaners have been used to connect the hose to several outlets at the same time. This led to cases where a hose was needed to be connected. However, if you start cleaning another area while you have already cleaned one area, the pressure inside all the pipes is already negative, so it takes a lot of force to open the lid of the other outlet. In addition, when the hose is removed, the lid tries to close with strong force, resulting in damage to the insertion port or injury to the user's fingers.

Accordingly, an object of the present invention is to provide a central cleaner that can be easily and safely connected to and disconnected from a receptacle even if it is already used at one location.

An embodiment of the invention is shown in FIGS. 1 to 4.

First of all, Figure 1 shows the piping configuration of the central cleaner, where 1 is the vacuum cleaner body installed at any position in the house, and 2 is the outlet 3a installed at a position suitable for cleaning each room. 3d and the cleaner main body 1, and is composed of a plurality of pipes having different distances from the insertion ports 3a to 3d to the main body 1.

Figure 3 shows the structure of the vacuum cleaner main body 1.
5 is a dust collection container removably attached to the lower part of the upper body 4 via a buckle 6; 7 is an air intake port of a conduit 2 provided in the dust collection container 5; 8 9 are U-shaped support legs fixed to both sides of the upper body 4 to support the cleaner body 1, and 9 is a handle for transporting the dust collection container 5.

FIG. 4 shows the structure of the hose outlets 3a to 3d, where 10 is the wall or floor surface to which the hose outlets 3a to 3d are attached, and 11 is a connection body embedded in the wall or floor 10. A pipe section 12 to which the end of the pipe line 2 is connected is provided approximately at the center. Reference numeral 13 denotes a socket main body having a socket 14 for a cleaning hose (not shown), which is fixed to the outside (indoor side) of the wall or floor 10 together with the connector 11. 15 is a lid rotatably attached to the insertion port body 13, and 16 is a gasket fixed to the inside of the lid 15 to prevent air leakage from the insertion port portion 14. Reference numeral 17 indicates a gasket interposed at the joint between the outlet body 13 and the connecting body 11, and 18 indicates a connection terminal provided in the outlet portion 14, and a hand switch (not shown) provided at the hand of the electric blower and the hose. The hose is provided for electrical connection by inserting the hose into the insertion port 14. 19 is a normally closed switch for temporary stop provided near the hose insertion port 14.

The electric circuit will be explained with reference to FIG. 20 is a plug that connects to an AC power source, 21 is an electric blower built into the main body 1, 22 is a transformer that converts commercial power to low voltage and supplies current to a hand switch 23 placed near the hose, and 24 is a This is a relay that drives the electric blower 21. The normally closed switch 19 is provided at each of the outlets 3a to 3c (referred to as 19a to 19c) except for the outlet 3d corresponding to the longest one in the length of the conduit 2, and each of the normally closed switches The switches 19a to 19c are connected in series so that the one corresponding to the shorter pipe line 2 is closer to the transformer 22 on the circuit. . Furthermore, hand switch 23
a to 23d are the corresponding normally closed switches 19a
-19c as parallel branches of a ladder circuit with series branches.

Explain circuit operation. No matter which outlet 3a to 3d hose's hand switch 23a to 23d is operated, the relay 24 is operated and the electric blower 21 is activated because the hand switches 23a to 23d are connected in parallel.
is energized, creating negative pressure within the pipe line 2 and the hose, making cleaning possible. Now, when you are cleaning using the outlet 3b that is the second closest to the vacuum cleaner body 1, and you want to use the outlet 3a that is closest to the vacuum cleaner body 1, the Operate the normally closed switch 19a to open the circuit. As a result, the relay 24 is stopped, the electric blower 21 is stopped, and the negative pressure in the pipe line 2 is reduced, so that the lid 15 can be opened easily. After connecting the hose to the insertion port 3a, if the normally closed switch 19a is returned to its original position, the circuit is closed and the electric blower 21 is activated again, allowing cleaning at two locations at the same time. Next, when using two locations at the same time, the one closer to the vacuum cleaner body 1 in terms of pipe length usually has a stronger suction force due to the lower piping resistance. When removing the hose from the port 3a, operating the normally closed switch 19a opens the circuit, thereby stopping the electric blower 21.
Therefore, the force with which the lid 15 is closed to the insertion port 3a is weak, so that the insertion port 3a, the lid 15, and the user's fingers are not damaged. On the other hand, the vacuum cleaner body 1
When the hose is pulled out from the outlet 3b on the far side, even if the normally closed switch 19b is operated, the hand switch 23a is turned on, so the electric blower 21 does not stop. This is because the suction force is weaker than that of the insertion port 3a on the side closer to the main body 1, so it does not pose a major problem. This relationship is between the sockets 3a, 3c and 3d, and between the sockets 3b
The same operation occurs between the ports 3c and 3d, and between the insertion ports 3c and 3d. Further, due to such an operation, a normally closed switch is not required at the farthest insertion port 3d.

As described above, in the central cleaner of the present invention, a normally closed switch is provided in each outlet other than the outlet farthest from the vacuum cleaner body, and the normally closed switch corresponds to the outlet closest to the vacuum cleaner body. The normally closed switches are connected in series with each other on the power supply side of the circuit, and the hand switches corresponding to these normally closed switches are made into parallel branches of a ladder circuit with the normally closed switches as the series branches. When inserting or removing a hose from one outlet while another is in use, the lid can be opened easily, and the outlet, lid, and user's To simplify the circuit configuration without injuring hands or fingers, and by simply connecting a hand switch in parallel to a power supply and reducing the number of circuit wiring and normally closed switches compared to a system in which normally closed switches are connected in series. It has the effect of being able to.

[Brief explanation of drawings]

Fig. 1 is a piping diagram of a central cleaner according to an embodiment of the present invention, Fig. 2 is an electric circuit diagram, Fig. 3 is a perspective view showing the external appearance of the vacuum cleaner body, and Fig. 4 is a sectional view of the insertion port. be. 1...Vacuum cleaner body, 2...Piping, 3a to 3d...
...Inlet, 15...Lid, 19a-19c...Normally closed switch, 21...Electric blower, 23a-23
d... Hand switch.

Claims (1)

[Claims] 1. A vacuum cleaner body with a built-in electric blower, an outlet with an opening/closing lid provided at each end of a plurality of conduits of different lengths communicating with the vacuum cleaner body, and these outlets. A cleaning hose with a hand switch that can be detachably inserted into the pipe, and a normally closed switch installed on the side of the outlet of the pipe except for one with the longest length of the pipe, and the hand switch is connected in parallel. A ladder circuit is formed in which the normally closed switch serves as a branch circuit and the normally closed switch serves as a series branch circuit, and this circuit has a hand switch and a normally closed switch at each of the outlets corresponding to each other at each stage of the circuit. A feature is that stages of hand switches and normally closed switches corresponding to short path lengths are successively connected on the power supply side, and this ladder circuit is connected to a series circuit with a power supply whose load is the electric blower. central cleaner.