JPH04164424A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To simply remove waste thread, etc., wound on a power brush at the time of cleaning work without requiring contamination of hand by allowing the power brush to rotate reversely when a reverse switch is turned on under the condition that a delay circuit is in operation. CONSTITUTION:When cleaning is finished and the body switch 30 is turned from On to Off, a delay circuit 33 is actuated to rotate a suction motor 2 and a drive motor 27 for a certain determined period of time. If meantime a reverse switch 32 is pushed, a power brush 10 is rotated reversely to the direction in which the drive motor 27 has been performed the cleaning. Now waste thread, etc., pinched fast between a deflected wire brush and a brush base 11 or in gap A between adjoining wire brushes 15 caused by suction from aside will drop naturally owing to widening of the gap A, to be sucked into the body 1 of cleaning machine by the suction motor 2 in rotating. Therefore, removal of waste thread can be made without making the hand dirty, and the power brush be always maintained in cleanly state.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vacuum cleaner equipped with a power brush rotatably driven by an attachment attached to the tip of a hose.

The vacuum cleaners mentioned above are conventionally equipped with a power brush that is rotatably driven in order to remove dirt and lint adhering to carpets by beating them. Are known. Flocked brushes were originally used as the above-mentioned power brushes, but since threads are likely to get tangled with these flocked brushes, improvements have been made to make power brushes that are less likely to get threads tangled.

As a power brush that does not easily become tangled, the one shown in FIG. 8 has been proposed (Japanese Patent Laid-Open No. 161334/1982). This power brush has a projection 40a formed on the circumferential surface of the brush base 40 shown in FIG. 8(a), as shown in FIG. 8(b).
A linear brush 41 formed of an elastic material shown in FIG.

However, even with this power brush, the lint sucked in from the front and back directions of the power brush does not wrap around the brush much, but the lint sucked in from the side direction is completely wrapped around the brush. I couldn't do anything to keep it from happening.

Therefore, the applicant of the present application conducted an experiment to find out why thread waste sucked in from the lateral direction gets wrapped around the thread, and obtained the following knowledge. That is, when the power brush is rotated during cleaning, the filament brush 41 is deflected, and due to this deflection, the dimension of the gap B between the filament brush 41 and the brush base 12 changes, and the thread is spread in the narrowed part in the horizontal direction. It was discovered that when it entered the brush, it got caught and lint got wrapped around the brush. Furthermore, it has been found that by rotating the power brush in the opposite direction to the cleaning direction, the threads caught in the gap B are released and the lint can be removed.

The present invention has been made based on this knowledge, and an object of the present invention is to provide a vacuum cleaner that can easily remove lint and the like wrapped around a power brush during cleaning without getting your hands dirty. do.

The present invention relates to a vacuum cleaner in which an attachment attached to the end of a hose is equipped with a power brush driven by a motor, and the power brush has a linear brush attached to a brush base. In addition to the main body switch for turning on and off the power supply to the motor, a reversing switch is provided to rotate the motor in the opposite direction to that for cleaning, and is further operated in conjunction with the OFF operation of the main body switch. A delay circuit that is energized for a certain period of time is provided to bypass the main body switch, and when a reverse switch is turned on while this delay circuit is operating, the power brush is rotated in the opposite direction. It is characterized by

According to the present invention, when cleaning is completed and the main body switch is turned off, the delay circuit begins to operate, and while this delay circuit is operating, when the reverse switch is turned on, the power is turned off. Since the brush rotates in the opposite direction to the direction used for cleaning, the lint, etc. that was previously wrapped around the power brush is removed.

EXAMPLE 1L-4 The present invention will be specifically explained below based on the drawings. Second
The figure is an external perspective view showing a vacuum cleaner to which the present invention is applied. Reference numeral 1 in the figure is a vacuum cleaner main body, which is equipped with a suction motor 2 inside. A hose 4 is attached to a suction port 3 provided in a vacuum cleaner body 1, and an attachment 5 is attached to the tip of the hose 4. A hand operation section 6 is provided in the middle of the hose 4.

Inside the attachment 5, as shown in FIG. 3, a rotatable power brush 10 is provided. This power brush 10 has protrusions 1 in each of, for example, two grooves 12 formed in a brush base 11, as shown in FIG.
The linear brush 15 is formed by fitting the base 16 of a linear brush 15 which has a plurality of 3 and a hollow part 14 inside, and as a whole, as shown in FIG. It is formed to protrude in a spiral shape. Further, this power brush 10 has a cylindrical holder 21.22, a flange 23.24, and a bearing holder 25.26 attached to both ends thereof, and can be detachably attached to the bearing parts 5a and 5b provided in the case of the attachment 5. It is attached and rotates when force from the drive motor 27 is transmitted via the belt 28.

The cylindrical holders 21 and 22 are arranged so that the lint can be removed from the power brush 1.
This is provided to prevent intrusion from the end surface of the wire brush 15, and like the linear brush 15, both are made of a material such as urethane rubber or soft vinyl chloride, and have the same structure. The structure will be explained with reference to FIGS. 5(a) and 5(b), taking the left cylindrical holder 21 as an example. The cylindrical holder 21 includes a cylindrical portion 21a that is fitted on the outside of a cut portion 11a that has a circular cross section and has a small diameter by cutting both ends of the brush base 11, and a hollow portion 14 of the linear brush 15.
It has a protrusion 17 for fitting into the groove 12 of the brush base 11, and a protrusion 18 for fitting into the groove 12 of the brush base 11.
is fitted into the outside of the cutting part 11a, and the protrusion 17.18 is inserted into the hollow part 14. It is fitted into the groove 12 and attached. Note that both ends of the brush base 11 are left open so as to be exposed outside the cylindrical portion 21a.

As shown in FIG. 6, the flanges 23, 24 have shafts 23a, 23b, 24a projecting on both sides.

24b, one of the shafts 23a, 24a is inserted into and supported by a bearing hole (not shown) formed in the center of both end faces of the brush base 11, and the other shaft 23b, 24b is supported by a bearing holder 25.26. It is rotatably supported. The bearing holders 25 and 26 are connected to the bearing portion 5a provided in the case of the attachment 5 as described above.
, 5b.

FIG. 1 is a block diagram of a power supply circuit which is a main part of the present invention. 2 in the figure is a suction motor built into the vacuum cleaner body 1;
7 is a drive motor for rotationally driving the power brush 10, and 30 is a main body switch provided on the hand operation section 6 of the hose 4. When the main body switch 30 is turned on, electricity is applied to the suction motor 2 from an outlet (not shown) via the main body switch 30, and then passes through the AC-DC converter 31, and then to the switch unit 3 having two switch circuits.
2 to the drive motor 27. As a result, the suction motor 2 rotates and the drive motor 27 rotates in the forward direction. The switch section 32 is a reversal switch for rotating the drive motor 27 in a direction opposite to the forward direction, and when this reversal switch 32 is pressed, the two switch circuits are switched from the broken line state to the solid line state. In other words,
The direction of power supply to the drive motor 27 is reversed.

Further, the main body switch 30 is provided with a delay circuit 33 in a bypassing manner. When the main body switch 30 is switched from on to off, the delay circuit 33 is activated and is energized for a certain period of time.

Therefore, in the vacuum cleaner according to the present invention configured as described above, when cleaning is completed and the main body switch 30 is turned from on to off, the delay circuit 33 starts operating and switches the suction motor 2 on and off for a certain period of time. The drive motor 27 is rotated. During this certain period of time, the person cleaning
When the reversal switch 32 is pressed, the switch is switched and the power brush 10 rotates in the opposite direction from when the drive motor 27 was cleaning. At this time, as shown in FIG. 7, suction is applied from the lateral direction between the linear brush 15 and the brush base 11 that are bent during cleaning, or in the gap A between adjacent linear brushes 15. By rotating the above-mentioned power brush 10 in the opposite direction, the gap A becomes wider, so that the lint and the like that have been caught and adhered to the paper fall naturally, and are cleaned by the rotating suction motor 2. It will be sucked into the machine body 1.

Further, as described above, cylindrical holders 21 and 22 are provided at both ends of the power brush 10.
．． The four-line brush 13 is formed by the protrusion 17 provided on the 22.
Since both ends of the hollow portion 14 of the brush base 11 and both ends of the groove 12 of the brush base 11 are closed, it is difficult for lint to adhere from the lateral direction.

In addition, although the above embodiment describes the case of a power brush in which the base brush is provided with two filamentary brushes, the present invention is not limited to this. Of course, the present invention can also be applied to a power brush equipped with a brush.

Furthermore, as detailed above, in the case of the present invention, when cleaning is completed and the main body switch is turned off and the delay circuit is operating, when the reverse switch is turned on, the power brush moves in the reverse direction. Since the power brush rotates at the same time, it is easy to remove lint and the like when cleaning is finished, and it can be removed by operating the reverse switch, so you don't get your hands dirty and you can always keep the power brush clean. It has the excellent effect of being able to maintain a stable condition.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing a power supply circuit which is the main part of the present invention, Fig. 2 is an external perspective view showing a vacuum cleaner to which the present invention is applied, and Fig. 3 is a bottom view showing an attachment part equipped with a power brush. , Fig. 4 is a side view showing the end face of the power brush, Fig. 5(a) is a side view showing the installation state of the cylindrical holder, Fig. 5(b) is its vertical cross-sectional view, and Fig. 6 is the power brush. The installation of the brush 10 is shown in an exploded view showing the structure; FIG. 7 is a side view showing the state in which the end of the power brush is bent; FIG. Figure 8(b)
8(c) is a perspective view showing the linear brush, and FIG. 8(c) is a perspective view showing the entire brush. l...Vacuum cleaner body, 2...Suction motor, 4...Hose, 5...Attachment, 10...Power brush, 11...Brush base, 15...Striated brush,
27... Drive motor, 30... Body switch, 32
...Reverse switch, 33...Delay circuit. Patent Applicant Sanyo Electric Co., Ltd. Agent Patent Attorney Tsukasa Nakajima 2 Figure 8 Figure 41 (C)

Claims (1)

[Claims] (1) In a vacuum cleaner in which an attachment attached to the end of the hose is equipped with a power brush driven by a motor, and the power brush has a linear brush attached to the brush base, the power to the entire vacuum cleaner is turned on. In addition to the main body switch for turning off the motor, there is also a reversing switch for rotating the motor in the opposite direction to that for cleaning, and a delay switch that operates in conjunction with the off operation of the main body switch and energizing for a certain period of time. A circuit is provided to bypass the main body switch, and when a reversing switch is turned on while the delay circuit is operating, the power brush is rotated in the opposite direction. Vacuum cleaner.