JPH1189770A - Radio control type cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a reliability of communication by receiving a control signal at a cleaner main body positively transmitted from operating part near hand. SOLUTION: A pair of rectangular conductive metal plate 31, 32 is arranged on the inside wall of a cap body 29 of a cleaner main body 27 along the wall shape in a circumference direction to make a receiving antenna. Each conductive metal plate is rectangular shape, λ/4 long and λ/50 wide, and the balance feeder cable is expanding from the opposed part. The transmission signal from the radio transmitter in the operating part near hand is received on the receiving antenna and the received signal is input from the balance feeder cable via a balance-unbalance converter and a matching part to the receiving part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wirelessly controlled cleaner that performs a cleaning operation by wirelessly driving a cleaner main body by operating a control switch provided on a hand operation unit.

[0002]

2. Description of the Related Art Conventionally, as such a wireless control type cleaner, for example, one described in Japanese Patent Application Laid-Open No. 4-30823 is known. As shown in FIG. 10, a cover 3 is fixed to the outer peripheral side of a base of a grip tube 2 provided at an end of a hose 1, and a radio transmission device 4 is built in the cover 3. An operation button 5 is provided on the upper surface of the cover 3.
Is provided. The wireless transmission device 4 includes a battery 6 and a circuit board 7
A signal transmission circuit 8 formed on the transmission line, an antenna terminal 9 from the signal transmission circuit 8 is connected to a shape-retaining wire 10 forming a transmission antenna, and a control signal is wirelessly transmitted by operating the operation button 5. It has become.

As shown in FIGS. 11 and 12, the cleaner main body 11 communicates with the dust collecting chamber, and an insertion pipe 13 provided at one end of a hose 12 is provided near an insertion port 14 to which the insertion pipe 13 is detachably inserted. The receiving device 15 is arranged at the same time. The receiving device 15 includes a receiving antenna 16 made of a linear conductor and a signal receiving circuit 1 formed on a circuit board 17.
The cleaning operation is performed by receiving a signal wirelessly transmitted from the wireless transmission device 4.

[0004]

However, when the shape retaining wire 10 is used as the transmitting antenna as described above,
It is good if the length of the hose is relatively short, but if the length of the hose is long, the antenna characteristics will change due to the flexible deformation of the hose, and the antenna characteristics will change even if the direction of the cleaner body changes. There was a problem that communication was not possible.

Therefore, according to the first and second aspects of the present invention, even when the length of the hose becomes longer or the direction of the cleaner main body changes, the control signal wirelessly transmitted from the hand operation section can be reliably received by the cleaner main body. And a wireless control type cleaner capable of improving communication reliability.

[0006]

According to the first aspect of the present invention,
A control switch and a wireless transmitter are provided on the hand operation unit, and a wireless receiver is provided on the cleaner body. A control signal is transmitted from the wireless transmitter by operating the control switch, and the control signal is received by the wireless receiver and the cleaner body is provided. Starts a cleaning operation, and in a wireless control type cleaner that collects dust sucked from a cleaner head by a cleaner body through a flexible hose, an upper side wall of the cleaner body is formed by an insulating member, and the upper side wall is formed on the upper side wall. A pair of long rectangular conductive metal plates having a length of approximately λ / 4 are arranged along the side wall shape so that the entire length is approximately λ / 2 in the circumferential direction, and the wireless receiver is provided. Are formed, and a balanced feed line is extended from a facing portion of each conductive metal plate.

According to a second aspect of the present invention, a control switch and a wireless transmitter are provided in a hand operation unit, a wireless receiver is provided in a cleaner body, and a control signal is transmitted from a wireless transmitter by operating a control switch. When the signal is received by the wireless receiver, the cleaner body starts the cleaning operation,
In a wireless control type cleaner in which dust sucked from a cleaner head is collected by a cleaner body via a flexible hose, an upper side wall of the cleaner body is formed of an insulating member, and the upper side wall has a length of approximately λ / 2. A conductive metal plate consisting of a long rectangular portion and an L-shaped portion extending along the rectangular portion from a position approximately λ / 12 deviated to one side from the center position of the rectangular portion to the center position is attached to the side wall of the conductive metal plate. A receiving antenna of a radio receiver is formed in a circumferential direction along the shape, and a leading end of an L-shaped portion of the conductive metal plate is connected to a signal line of a coaxial feed line via a capacitor, and the coaxial signal line is formed. Is connected to the center of the rectangular portion of the conductive metal.

[0008]

Embodiments of the present invention will be described with reference to the drawings. (First Embodiment) FIG. 1 is an external view showing the overall structure of a cleaner, in which a gripping pipe part 24 is attached via a extension pipe 23 to a suction pipe part 22 having a cleaner head 21 attached to the tip thereof.
A hand operation section 25 is provided on the grip tube section 24. The hand operation unit 25 is provided with a control switch and a wireless transmitter.

A cleaner main body 27 having a cylindrical shape and provided with a caster 26 at the bottom is provided.
And the gripping tube portion 24 are connected by a flexible long hose 28. The cleaner main body 27 is provided with a lid 29 made of an insulating member on the upper part, and a dust collection outlet 30 is provided at the center of the top of the lid 29.

Then, as shown in FIG.
A pair of long rectangular conductive metal plates 3 on the inner surface side of the side wall
The receiving antennas are formed by arranging 1, 32 in the circumferential direction along the shape of the side wall. Each of the conductive metal plates 31 and 32 is, for example, a thin copper plate having a thickness of about 0.15 mm.

FIG. 3 is a block diagram showing the configuration of the radio receiver. Each of the conductive metal plates 31 and 32 has a rectangular shape having a length of approximately λ / 4 and a width of approximately λ / 50. A balanced feed line 33 extends from a portion facing the conductive metal plates 31 and 32 and is connected to an input terminal of a balanced-unbalanced converter 34. The output terminal of the balance-unbalance converter 34 is connected to the input terminal of the matching unit 35, and the output terminal of the matching unit 35 is connected to the receiving unit 3.
6 is connected.

The receiving section 36 constitutes a main part of the radio receiver, and uses the frequency from the local frequency oscillator 37
The received signal is subjected to, for example, frequency down-conversion and further FM demodulation to reproduce the received signal, and the reproduced received signal is supplied to the microprocessor 38. The microprocessor 38 processes and decodes the received signal, and extracts and outputs a control signal from the wireless transmitter of the hand operation unit 25. Upon receiving this control signal, the cleaner main body 27 starts or stops the cleaning operation.

[0013] Here, the hand-held operation unit 25 having a built-in radio transmitter is arranged in the vertical direction, which is the direction of cleaning, and the reception antenna receives horizontal polarized waves and receives vertically polarized waves. When the reception level is shown, the reception level when receiving with horizontal polarization is as shown in a graph g1 in FIG. 4, and the reception level when receiving with vertical polarization is as shown in a graph g2 in FIG. Become. That is, the receiving antenna can receive a higher receiving level in almost all directions when the signal is received with the horizontally polarized wave. This tendency is indicated by the operation unit 2 at hand.
The same is true if 5 is laid on its side. Therefore, as described above, the pair of conductive metal plates 31 and 32 are connected to the cylindrical lid 29.
By arranging in the circumferential direction along the shape of the side wall of, it is possible to maintain good reception sensitivity as a receiving antenna,
More reliable communication can be performed.

Next, the relationship between the VSWR (voltage standing wave ratio) and the reception level due to the difference in the height at which the receiving antennas are arranged will be described. A graph g3 in FIG. 5 shows a case where the height at which the receiving antenna is arranged with respect to the cleaner main body is increased, and a graph g4 in FIG. 5 shows a case where the height at which the receiving antenna is arranged is reduced. Hence, VS is higher when the receiving antenna is arranged at a higher position than at a lower position.
The characteristics of the WR value are slightly wide and the band is wide.

FIG. 6 shows the reception level with respect to the angle when the receiving antenna is arranged at a high position and when the receiving antenna is arranged at a low position. Graph g5 shows the case where the receiving antenna is arranged at a high position, and graph g6 shows the position at a low position. It is a case where it arrange | positions at. As described above, the reception level with respect to the angle is higher when the receiving antenna is arranged at a higher position, and reliable communication can be ensured even when the directions of the hand operation unit 25 and the cleaner main body 27 change. In this way, by arranging the receiving antenna on the upper lid 29 of the cleaner main body 27 at a high position, the band is widened and adjustment when mounting is simplified,
In addition, the reception level with respect to the angle is high, and reliable communication can be performed.

Therefore, when cleaning is performed using the long hose 28, even if the distance between the hand operation unit 25 and the cleaner main body 27 becomes longer or the direction of the cleaner main body 27 changes, the radio of the hand operation unit 25 is not changed. The control signal transmitted from the transmitter can be reliably received by the receiving antenna of the cleaner main body 27, and the reliability of communication can be improved. Further, since the pair of conductive metal plates 31 and 32 forming the receiving antenna are arranged along the inner peripheral surface of the side wall of the lid 29, the antenna may be damaged or the antenna may be obstructed when the cleaner is stored. There is no such thing as

(Second Embodiment) The first embodiment described above
The same reference numerals are given to the same portions as those in the embodiment, and different portions will be described. As shown in FIG. 7, a conductive metal plate 43 including a long rectangular portion 41 and an L-shaped portion 42 is provided on the inner peripheral surface of a side wall of a lid 29 formed of an insulating member provided on an upper portion of the cleaner main body 27. Are arranged in the circumferential direction along the shape of the antenna to form a receiving antenna.

FIG. 8 is a block diagram showing the configuration of the radio receiver. The conductive metal plate 43 has a thickness of, for example, 0.15 mm.
And the length of the rectangular portion 41 is approximately λ /
2. The L-shaped portion 42 extends along the rectangular portion 41 from a position having a width of approximately λ / 50 and being approximately λ / 12 deviated to one side from the center position of the rectangular portion 41 to the center position thereof. I have. That is, the L-shaped portion 42 is composed of a short side and a long side orthogonal to the short side, and the short side has a width substantially centered on a position deviated by approximately λ / 12 to one side from the center position of the rectangular portion 41. At λ / 166, the length extends approximately λ / 56 in the direction orthogonal to the longitudinal direction of the rectangular portion 41, and the longer side is formed by adding the longer side having a width of approximately λ / 125 to the tip of the shorter side. Part 4
1 extends parallel to the rectangular portion 41 up to the center position.

The tip of the L-shaped portion 42 is connected to a capacitor 44
Is connected to the signal line of the coaxial power supply line 45 via. The grounding part of the coaxial power supply line 45 is connected to the center of the rectangular part 41. Then, the coaxial power supply line 45 is connected to the receiving unit 4.
6 is connected. The receiving unit 46 performs, for example, frequency down-converting the received signal based on the frequency from the local frequency oscillator 47, and further reproduces the received signal by FM demodulation, and supplies the reproduced received signal to the microprocessor 38. It has become. The microprocessor 38 processes and decodes the received signal, and processes the received signal.
The control signal from the wireless transmitter No. 5 is extracted and output. Upon receiving this control signal, the cleaner main body 27 starts or stops the cleaning operation.

In this configuration, the L-shaped part 42 of the receiving antenna performs a part of the function of gamma matching and forms a part of the matching part. The capacitor 44 has a function of fine adjustment of matching. As described above, since the antenna has a part of the function of the matching unit, the configuration of the wireless receiver is extremely simple. Moreover, since the antenna is formed integrally by the conductive metal plate 43, a plurality of the same antenna can be cut out at a time, which is excellent in workability and mass productivity.

FIG. 9 shows the directional characteristics of the receiving antenna, and shows that the receiving antenna has directivity over the entire circumference. Therefore, even if the direction of the cleaner main body 27 changes during cleaning and the direction of the hand operation unit 25 becomes any direction, the receiving antenna can reliably receive the radio wave from the wireless transmission unit of the hand operation unit 25.

In this embodiment, the receiving antenna is arranged along the inner peripheral surface of the side wall of the lid 29 which is located above the cleaner main body 27. The adjustment is easy when mounting because the antenna is wide, the reception level is high, and reliable communication can be performed. In addition, there is obtained an effect that the antenna is not damaged and the antenna is not in the way when the cleaner is stored. Things. .

[0023]

According to the first and second aspects of the present invention, even when the length of the hose becomes longer or the direction of the cleaner main body changes, the control signal wirelessly transmitted from the hand operation section can be reliably transmitted to the cleaner main body. Reception can be performed, and communication reliability can be improved.

[Brief description of the drawings]

FIG. 1 is an external view of an entire cleaner showing a first embodiment of the present invention.

FIG. 2 is a perspective view of a cleaner main body showing an arrangement state of a receiving antenna in the embodiment.

FIG. 3 is a block diagram showing a configuration of a wireless receiver in the embodiment.

FIG. 4 is a diagram illustrating a reception level with respect to an angle when a reception antenna receives a horizontally polarized wave and a case where a reception antenna receives a vertically polarized wave;

FIG. 5 shows a VS according to a difference in height at which a receiving antenna is arranged.
The figure which shows the relationship between WR and reception level.

FIG. 6 is a diagram showing a relationship between a reception level and an angle depending on a difference in height at which a reception antenna is arranged.

FIG. 7 is a perspective view of a cleaner main body showing an arrangement state of a receiving antenna according to a second embodiment of the present invention.

FIG. 8 is a block diagram showing a configuration of a wireless receiver in the embodiment.

FIG. 9 is a diagram showing directivity of a receiving antenna in the embodiment.

FIG. 10 is a half sectional view of a gripping tube portion showing a conventional example.

FIG. 11 is a front view of the conventional cleaner body.

FIG. 12 is a sectional view of a hose insertion portion of the cleaner body of the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 ... Cleaner head 25 ... Hand operation part 27 ... Cleaner main body 28 ... Long hose 29 ... Lid 31, 32 ... Conductive metal plate (receiving antenna) 36 ... Receiving part

Claims (2)

[Claims] 1. A control switch and a wireless transmitter are provided in a hand operation unit, and a wireless receiver is provided in a cleaner main body.
By operating the control switch, a control signal is transmitted from the wireless transmitter, the control signal is received by the wireless receiver, the cleaner body starts a cleaning operation, and dust sucked from the cleaner head is removed by a flexible method. In a wireless control type cleaner that collects dust with the cleaner main body via a hose, an upper side wall of the cleaner main body is formed of an insulating member, and a pair of a long rectangular shape having a length of approximately λ / 4 is formed on the upper side wall. Are arranged along the shape of the side wall so as to have a total length of approximately λ / 2 in the circumferential direction to form a receiving antenna of the wireless receiver. A radio controlled cleaner characterized by extending a balanced feed line from a section. 2. A control switch and a wireless transmitter are provided in a hand operation unit, and a wireless receiver is provided in a cleaner body.
By operating the control switch, a control signal is transmitted from the wireless transmitter, the control signal is received by the wireless receiver, the cleaner body starts a cleaning operation, and dust sucked from the cleaner head is removed by a flexible method. In a wireless control type cleaner that collects dust with the cleaner body via a hose, an upper side wall of the cleaner body is formed of an insulating member, and a long rectangular portion having a length of approximately λ / 2 is formed on the upper side wall. A conductive metal plate formed of an L-shaped portion extending along the rectangular portion from a position approximately λ / 12 deviated to one side from the center position of the portion to the center position in the circumferential direction along the shape of the side wall thereof It is arranged to form a receiving antenna of the wireless receiver, and the leading end of the L-shaped portion of the conductive metal plate is connected to a signal line of a coaxial feed line via a capacitor, and a grounding portion of the coaxial signal line is connected to the conductive portion. Sex metal Radio-controlled cleaner, characterized in that connected to the central position of the rectangular portion.