JPS6327007B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a vacuum cleaner.

Cleaning is generally done by connecting a flexible hose to the suction pipe, but if foreign matter such as coarse dust or pieces of cloth is inadvertently sucked in, remove the coarse dust stuck in the flexible hose. I'm having a hard time removing it. This is especially true for vacuum cleaners with central piping, in which the dust collection part is set at a specific position, and a flexible hose is connected to the connection port installed in each room to clean the dust collection part. The flexible hose also has a length of up to 6 meters as it must be moved over a wide range, making it extremely difficult to remove foreign objects. If the foreign matter is sucked into the piping under the floor or in the wall after the flexible hose, it is extremely difficult to remove the foreign matter.

This invention eliminates these drawbacks,
The object of the present invention is to provide a vacuum cleaner that can prevent clogging of large dust and foreign matter from difficult-to-remove portions of a suction pipe and can easily remove them.

This invention increases the flow resistance of coarse dust and foreign matter in a bottleneck formed in a suction pipe, activates a detector by suction of coarse dust and foreign matter, and stops an electric blower, and connects the detector and bottleneck with a flexible hose. By locating it in front of the suction side of the filter, it prevents coarse dust and foreign matter from being sucked in deeper than that position, making it easy to remove coarse dust and foreign matter. .

A first embodiment of this invention will be described with reference to FIGS. 1 to 3. A dust collection case 4, which is a dust collection section and houses a filter 3, is removably connected to a main body case 2 containing an electric blower 1. An insertion tube 7 of a flexible hose 6 is inserted into a suction port 5 formed in the dust collection case 4. Extension pipes 9 and 10 and a suction tool 11 are sequentially connected to the grip pipe 8 of the flexible hose 6. The grip tube 8 is fitted into the connection part 12 of the flexible hose 6 as shown in FIG.
This connecting portion 12 holds a hose cover 13 and is also provided with a hand switch 14.

Thus, a bottleneck 15 having a smaller diameter is formed on the inner periphery of the connecting portion 12, and a switch 16, which is a detector, is installed on the back side of the bottleneck 15. The actuator 17 of the switch 16 projects inwardly into the bottleneck 15. The flexible hose 6 is formed by winding a piano wire 18 and a conductive wire 18a into a coil shape and embedding the same.The conductive wire 18a connects the hand switch 14 and the switch 16 to a terminal provided in the insertion tube 7. These terminals are inserted into the insertion tube 7.
When the dust collection case 4 is inserted into the suction port 5,
The electrical circuit shown in FIG. 3 is formed by connecting to the terminal provided inside. That is, the primary coil 21 of the transformer 20 and the electric blower 1 are connected to the power source 19 in parallel. A relay switch 23, which is turned on by energizing the secondary coil 22, is connected between the power source 19 and the electric blower 1. Further, the secondary coil 22, the hand switch 14, and the switch 16 are connected in series. Note that the transformer 20 is built into the main body case 2.

In such a configuration, the switch 16 is of a normally cross type, and the hand switch 1
4 is turned on, the relay switch 23 is turned on, and the electric blower 1 is driven. Therefore, the outside air containing dust is sucked into the dust collection case 4 from the suction tool 11. When large dust or foreign matter is sucked in, the actuator 17 of the switch 16 is pushed and deviated, the switch 16 is turned OFF, the relay switch 23 is turned OFF, and the electric blower 1 is immediately stopped. In addition, the bottleneck 15 has a large flow resistance. Therefore, coarse dust and foreign matter do not enter deep into the flexible hose 6 and can be taken out very easily.

Next, a second embodiment of the present invention will be explained 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).
In this embodiment, a bowl-shaped bottle-shaped bottleneck 24 is formed on the inner periphery of the extension tube 9, and a switch 16 is installed on the back side of the bottle-shaped bottleneck 24. This switch 16 is a bottleneck 24
The secondary coil 22 and the hand switch 14 are connected by a conductor 18a embedded in the extension tube 9, the grip tube 18, the flexible hose 6, and the insertion tube 7 as in FIG. and are connected in parallel. A terminal 25 is embedded in the end of the grip tube 8, and a terminal 26 connected to this terminal 25 is provided on the extension tube 9.

Therefore, when coarse dust or the like is sucked into the extension pipe 9, the switch 16 is turned off and the electric blower 1 is stopped. Coarse dust and the like also have increased resistance in the bottleneck 24, making it difficult for them to be sucked deeper into the bottleneck. Since the extension tube 9 is straight, coarse dust and foreign matter can be easily pushed out with a rod or the like.

Furthermore, FIG. 6 shows a third embodiment of the present invention. In this embodiment, a switch 16 is provided on the suction tool 11. That is, the suction tool 11 has a suction port body 27 rotatably fitted with a rotary tube 28 connected to the extension tube 10, and a brush 29 is attached to the suction port body 27, and a brush 29 is attached to the suction port body 27, and a brush 29 is attached to the suction port body 27, and a brush 29 is attached to the suction port body 27, and a brush 29 is attached to the suction port body 27, and a brush 29 is installed in front of the suction port body 27. A suction opening 30 is formed. The center of this suction opening 30 is a narrow passage 31 having a narrowed cross-sectional area, and is communicated with the rotary pipe 28 . Thus, the switch 16 is attached to the suction port body 27 with the actuator 17 protruding inward of the bottleneck 31. A ring-shaped contact 32 that contacts each other is formed on the fitting surface of the suction port body 27 and the rotary tube 28, and a conductive wire 33 connecting these contacts 32 and the switch 16 is embedded in the suction port body 27, and the contact A conductive wire 34 connected to 32 is embedded in the rotating tube 28. By connecting the rotary tube 28 to the suction port 5 via the extension tubes 10 and 9 and the flexible hose 6, the conducting wire 34 of the rotary tube 28 is connected to the secondary coil 22 of the transformer 20.

Therefore, coarse dust and foreign matter are removed through the large suction opening 3.
Even if it is sucked in from 0, the switch 16 is switched while receiving resistance from the bottleneck 31. As a result, the electric blower 1 stops. In this case, coarse dust and the like can be easily taken out through the large suction opening 30.

Furthermore, a fourth embodiment of the present invention will be explained based on FIGS. 7 to 9. A dust collection case 35, which is a dust collection unit containing a filter (not shown), is installed at a specific location. This dust collection case 35
A main body case 36 is placed on top of the main body case 36. A connection port body 39 fixed to a wall 38, floor, etc. for each room is connected to the suction port 37 of the dust collection case 35 by a conduit 40. The connection ports 39 have a cylindrical shape with an opening on one side and form an air passage, and the insertion tube 7 of the flexible hose 6 connected to these connection ports 39 has a clamp 41, a hand switch 14, and a switch. 1
A terminal 42 by a pin connected to 6 is provided. A lid 43 for opening and closing the opening edge of the connection port body 39 is rotatably attached while being biased in the closing direction, a terminal 44 that contacts the terminal 42 is fixed inside, and a leak hole 45 is provided on the outer periphery. is formed. This leak hole 45 is connected to the movable iron core 4 of the electromagnet 46.
It is opened and closed by a leak valve 48 connected to 7. A terminal 44 in the connection port body 39 is connected to the secondary coil 22 of the transformer 20 housed in the main body case 36 by a conductive wire (not shown).
Note that the switch 16 is provided at the connecting portion 12 of the flexible hose 6 as shown in the first embodiment (FIG. 2). Of course, it may be provided on the extension pipe 9 or the suction tool 11. Therefore, in order to clean the connection port body 3.
9, suction hose 6, extension pipes 9, 10, and suction tool 11
When these are sequentially connected via pipe lines, a series circuit is simultaneously formed between the secondary coil 22 of the transformer 20, the hand switch 14, the switch 16, and the electromagnet 46, as shown in FIG. 9, and the hand switch 14 is turned on. By doing so, the relay switch 23 is turned on and the electric blower 1 is driven.

However, when coarse dust etc. is sucked into the suction pipe, the switch 16 is turned OFF, and the electric blower 1
A relay switch 23 cuts off the connection between the power source 19 and the power source 19. At this time, the volume of the unused connection port 39 and all the pipes 40 that are closed by the lid 43 is large, and normally it would take several tens of seconds to return to atmospheric pressure, but when the switch 16 is turned OFF. At the same time, the power to the electromagnet 46 is also cut off, so that the movable iron core 47 returns to its original position and the leak valve 48 opens the leak hole 45. Therefore, the pressure inside the connection port body 39 immediately becomes equal to the atmospheric pressure, which acts to prevent the suction of coarse dust and the like as much as possible upstream. Therefore, coarse dust and the like will not be sucked into the pipe 40 located further back than the connection port body 39. This is an extremely effective effect in a vacuum cleaner with centralized piping.

As shown in FIG. 10, when the electromagnet 46 is connected to the power supply 19 in parallel with the electric blower 1 and the relay switch 23 is cut off between the electric blower 1 and the power supply 19, the connection between the electromagnet 46 and the power supply 19 is The same effect can be obtained even if the leak hole 45 is opened by the excitation action of the electromagnet 46 when the leak hole 45 is opened by the excitation action of the electromagnet 46.

Since this invention is configured as described above, the detector can be activated to stop the electric blower when coarse dust etc. is sucked into the suction pipe, and the flow resistance of coarse dust can be reduced by the bottleneck. Since these detectors and bottlenecks are located in the suction pipe from the suction opening of the suction device to near the suction end of the flexible hose, large dust and foreign objects downstream from the flexible hose are This has the effect that coarse dust and the like in the suction pipe can be easily removed.

[Brief explanation of drawings]

FIG. 1 is a side view showing a first embodiment of the present invention, FIG. 2 is a longitudinal side view showing an enlarged part of the suction hose, FIG. 3 is an electric circuit diagram thereof, and FIG.
The figure shows a second embodiment of the present invention, in which a side view is shown with a portion of the suction pipe cut away, FIG. 7 is an enlarged longitudinal cross-sectional side view of a suction tool showing a third embodiment of the present invention, FIG. 7 is a pipe diagram showing a fourth embodiment of the invention, and FIG. An enlarged vertical side view, Figure 9 is the electrical circuit diagram, and Figure 1.
Figure 0 shows a modification of the electric circuit. 1...Electric blower, 4...Dust collection case (dust collection part), 6...Suction hose, 9-10...Extension pipe,
11... Suction tool, 15... bottleneck, 16... switch (detector), 19... power source, 24... bottleneck, 3
0... Suction opening, 31... bottleneck.

Claims (1)

[Claims] 1. A dust collection part that is maintained in a negative pressure state by driving an electric blower is provided, a flexible hose is connected directly or indirectly to this dust collection part, and an extension pipe and a suction pipe are connected to the suction side of this flexible hose. An overflow path with a reduced cross-sectional area is formed in the suction pipe from the suction opening of the suction device to near the suction side end of the flexible hose, and coarse dust is removed from the overflow path. A vacuum cleaner characterized in that it is provided with a detector that is activated when foreign matter is sucked in and emits a signal to cut off the power to the electric blower.