JPH0630871A - Vacuum cleaner - Google Patents

Abstract

(57) [Abstract] [Purpose] The number of parts is reduced and the degree of freedom in structural design is increased by exchanging signals by mutual induction of the first coil of the vacuum cleaner body and the second coil of the hose hand. Is to provide a vacuum cleaner. A vacuum cleaner body 1 and a hose hand portion 3 which can be separated from the cleaner body 1 are provided, a first coil 2 is provided on the vacuum cleaner body 1, and a first coil 2 is provided on the hose hand portion 3. Second coil 4 for exchanging signals with mutual coil 2 by mutual induction
Was set up.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner having a cleaner body and a hose handle which is separable from the cleaner body.

[0002]

2. Description of the Related Art Conventionally, in a vacuum cleaner having a vacuum cleaner body containing a dust bag and a dust suction motor, and a hose hand portion detachably attachable to the vacuum cleaner body and having a hose and a hand operation / display unit integrated with each other. Uses a rotating ring and a slider to exchange signals between the handheld operation unit and the cleaner body.

An example of a conventional electrical connection for exchanging signals between a cleaner body and a hose handle will be described below with reference to the drawings. FIG. 4 shows an example of a cleaner in which the cleaner body 1 and the hose handle 21 are attachable and detachable. The hose hand portion 21 includes a hose tip portion 5, a hose 6, a hand operation / display portion 7, and signal terminal portions 22 and 23. The extension tube 8 and the tip suction portion 9 are connected to the hose proximal portion 21.

The connection unit 24 in the cleaner body 1 connects the hose handle 21 and the cleaner body side,
This is the part that passes the hose and is sucked into the vacuum cleaner body and sends and receives signals. This connection unit 24
Are signal terminals 25 and 26 connected to the signal terminals 22 and 23 of the hose proximal portion 21, and conductive rings 27 and 28 and rings 27 and 2 electrically connected to the signal terminals 25 and 26.
Sliders 29, 3 having electrical continuity by contact with 8
It consists of zero.

The connection unit 24 is connected to the hose proximal portion 2
The signal terminal portions 22 and 23 of No. 1 are inserted into the cleaner body 1 and connected to the signal terminals 25 and 26, and rotate around the axis A as the hose rotates. When the connection unit 24 rotates, the rings 27 and 28 rotate together. Electrical connection is maintained by the pressing of the sliders 29, 30 to the rotating ring.

[0006]

However, the above configuration has the following problems. That is, between the signal terminal portions 22 and 23 and the signal terminals 25 and 26, and the ring 2
Signals are delivered and received at two points between 7, 28 and the sliders 29, 30, and the number of parts is increased due to electrical connection. For this reason, a large physical space is required, and the structure is also restricted due to the fact that it has contacts at two locations, and there is a problem that the cleaner body 1 becomes large. In addition, there is a problem that the contact is lost due to the oxidation of the signal terminal and the attachment of dust to the contact. To deal with this, a cleaning pad for the ring is required to blow dust off by applying a high voltage, to lubricate the ring for better sliding.

The present invention is intended to solve such conventional problems, and a first object thereof is to mutually guide the first coil of the cleaner main body and the second coil of the hose proximal portion. By exchanging signals, the number of parts is reduced and the degree of freedom in structural design is increased.

A second object is that the motor rotation speed control signal can be transmitted in a non-contact manner, and the signal transmission can be performed without a concern of contact failure of a contact which is a problem in the case of the contact type. is there.

A third object is to realize a cleaner that is easier to use by making it possible to check the amount of dust collected in the cleaner body at the hand of the hose without looking at the cleaner body. is there.

[0010]

SUMMARY OF THE INVENTION To achieve the first object, the present invention comprises a cleaner body and a hose hand portion separable from the cleaner body. And a second coil for exchanging signals by mutual induction with the first coil is provided in the hose proximal portion.

The present invention for achieving the second object comprises a cleaner body, and a hose hand portion separable from the cleaner body, wherein the cleaner body has a first coil and a motor drive circuit. A motor for sucking in dust is provided, and a second coil for exchanging signals with the first coil and a phase control signal generating circuit for setting the rotation speed of the motor are provided in the hand portion of the hose. It is an opportunity.

The present invention for achieving the third object comprises a cleaner body, and a hose hand portion separable from the cleaner body, wherein the cleaner body has a negative pressure for detecting the amount of dust. A detection circuit and a first coil for generating a signal according to the detection are provided, and a hose hand portion is provided with a second coil for exchanging signals with the first coil by mutual induction and a waste based on the signal. The vacuum cleaner is provided with display means for displaying the amount.

[0013]

According to the first aspect of the present invention, a signal is transmitted and received between the hand portion of the hose and the cleaner body by the mutual induction action of the first coil of the cleaner body and the second coil of the hand operation hose portion. It acts to transmit.

According to a second aspect of the present invention, a phase control signal for controlling the motor rotational speed output from the hose proximal portion is transmitted from the second coil at the hose proximal portion to the first coil of the cleaner body by mutual induction. However, this signal is converted into a signal capable of driving the motor by the motor drive circuit, and the motor of the cleaner body is driven.

A third means is to detect the amount of dust in the cleaner body by an increase in the negative pressure inside the cleaner body, and to output a signal corresponding to the amount of negative pressure from the first coil of the cleaner body to the hose handle. Is transmitted to the second coil and the amount of dust is displayed on the display means based on this signal.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a cleaner body 1 including a dust bag and a dust suction motor has a first coil 2. The hose hand portion 3 which is detachably attached to the cleaner body 1 and which integrates the hose and the hand operation / display portion has a first coil 2 and a second coil 4 for generating mutual induction.
A hose tip 5, which is inserted into the cleaner body 1, a hose 6,
It consists of a hand operation and display unit 7. The extension tube 8 and the tip suction portion 9 are connected to the hose proximal portion 3.

The operation of the present embodiment constructed as above will be described below. When using the cleaner, the hose tip 5 of the hose handle 3 is inserted into the cleaner body 1, and the second coil 4 and the first coil 2 are arranged concentrically (in the present embodiment, they are concentric). Although it is configured to be arranged, since it is intended to generate mutual induction, it is self-evident that there is a degree of freedom in the arrangement of the first coil and the second coil, and the form of coupling is different. There is also a method, for example, that the coils have the same diameter and that the two coils are opposed to each other). As a result, a mutual induction action is exerted between the first coil 2 and the second coil 4, and an AC signal generated in the first coil 2 is generated in the second coil 4 by the mutual induction action. When an AC signal is generated in the second coil 4, an AC signal is generated in the first coil 2 due to the mutual induction effect. As a result, it is possible to transmit a signal from the hand operation and display unit 7 to the cleaner body 1, and conversely, a signal from the cleaner body 1 to the hand operation and display unit 7. .

Next, a second embodiment of the present invention will be described with reference to FIG. The same elements as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted. Reference numeral 10 is a phase control signal generating circuit in the hose hand portion 3, which is manually set by the user at the hose hand portion 3 or automatically sets the number of rotations of the motor by a dust sensor provided in the cleaner. The phase control signal is generated, and a low-to-high or high-to-low digital signal change is generated corresponding to a desired phase, and its output is the second coil 4
It is connected to the. Reference numeral 11 denotes a motor drive circuit, which comprises a monostable vibrator 11a and a triac 11b, the input of which is connected to the first coil 4 and the output of which is connected to the dust suction motor 12.

The operation of the circuit configured as described above will be described below. The signal generated by the phase control signal generating circuit 10 is received by the second coil 4 and further generated by the first coil 2 by the mutual induction action. At this time, since the signal generated by the phase control signal generation circuit 10 is a signal which changes the digital level in accordance with the desired phase, it is considered that the first coil 2 is generated by the phase control signal generation circuit 10. A similar signal that produces a digital change corresponding to the desired phase is generated. This signal serves as a trigger signal to drive the monostable vibrator 11a. The triac 11b is turned on by the pulse generated by the monostable vibrator 11a to drive the motor 12. As a result, the motor 12 is driven according to the desired phase.

Next, a third embodiment of the present invention will be described with reference to FIG. The same elements as those in the second embodiment are designated by the same reference numerals and the description thereof will be omitted. 13 is a cleaner body 1
This is a pressure detection circuit provided inside and comprises a semiconductor pressure sensor 13a and a voltage frequency conversion circuit 13b, and the voltage frequency conversion circuit 13b is connected to the output of the semiconductor pressure sensor 13a. Voltage frequency conversion circuit 13
The first coil 2 is connected to the output of b. Reference numeral 14 denotes a display means provided in the hose hand portion 3, which is a frequency-voltage conversion circuit 14a and a comparator 14b connected to its output.
And the LED 14 connected to the output of the comparator 14b
It consists of c.

The operation of the circuit configured as above will be described. When the amount of dust collected in the cleaner body 1 increases, the negative pressure inside the cleaner body 1 increases, and the semiconductor pressure sensor 13a detects this, and the output voltage of the semiconductor pressure sensor 13a according to the negative pressure increases. can get. This voltage is converted into a frequency by the voltage frequency conversion circuit 13b, and a frequency signal is generated in the first coil 2 connected to its output. The frequency signal generated in the first coil 2 is transmitted to the second coil 4 by magnetic coupling, and the frequency signal generated in the second coil 4 is converted into a voltage by the frequency voltage conversion circuit 14a. This voltage is input to one input of the comparator 14b, the reference voltage is applied to the other input, and the LED 14c is connected to the output of the comparator 14b. Therefore, the amount of dust corresponding to this reference voltage is greater than that of the vacuum cleaner. When collected in the body 1, the LED 14c lights up.

[0022]

As described above, according to the present invention, various signals can be transmitted between the cleaner body and the hand portion of the hose without contact, and the signal transmission is simpler than that of the contact type. It is possible to reduce the number of parts and increase the degree of freedom in structural design.

Further, according to the present invention, it is possible to transmit the motor rotation speed control signal in a non-contact manner, and it is possible to perform a signal transmission without the concern of contact failure of the contact which is a problem in the contact type.

Furthermore, according to the present invention, the amount of dust collected in the cleaner body can be confirmed at the hose hand portion without looking at the cleaner body side, and the cleaner can be more convenient to use. it can.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing a first embodiment of the present invention.

FIG. 2 is a block diagram showing the second embodiment.

FIG. 3 is a block diagram showing the third embodiment.

FIG. 4 is a block diagram showing a conventional vacuum cleaner.

[Explanation of symbols]

 1 Vacuum cleaner body 2 1st coil 3 Hose hand part 4 2nd coil 5 Hose tip part 6 Hose 7 Hand operation and display part 9 Tip suction part 10 Phase control signal generation circuit 11 Motor drive circuit 12 Motor

Claims (3)

[Claims] 1. A cleaner main body and a hose hand portion separable from the cleaner body, wherein the cleaner main body is provided with a first coil, and the hose hand portion is provided with a first coil and a first coil. A vacuum cleaner equipped with a second coil that sends and receives signals by induction. 2. A cleaner main body and a hose hand portion separable from the cleaner main body, wherein the cleaner main body is provided with a first coil, a motor drive circuit and a dust suction motor, and the hose. A vacuum cleaner provided with a second coil for transmitting and receiving a signal by mutual induction with a first coil and a phase control signal generating circuit for setting a rotation speed of the motor at a hand portion. 3. A vacuum cleaner main body, and a hose hand portion separable from the vacuum cleaner main body, wherein the vacuum cleaner main body generates a negative pressure detection circuit for detecting the amount of dust and a signal corresponding to the detection. A vacuum cleaner provided with a first coil, and a second coil for exchanging signals with the first coil by mutual induction and a display means for displaying the amount of waste based on the signal at the hose proximal portion. .