JPH0568657A - Brush movement detecting device of vacuum cleaner - Google Patents

Abstract

PURPOSE:To provide the movement detecting device of a vacuum cleaner in which the rotation axis does not rotate easily due to vibration of a brush motor. CONSTITUTION:One end of an elastic body 8 is fixed to a brush part main body 1, the other end thereof is pressed against a rotation axis 3, and a rotation of the rotation axis 3 caused by vibration of a brush motor is prevented by fircional force of the elastic body 8 and the rotation axis 3, by which a malfunction of an optical sensor 6 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brush movement detecting device for an electric vacuum cleaner having a brush movement sensor for detecting movement of the brush portion by connecting a brush to a tip of a hose portion connected to a cleaner body. Is.

[0002]

2. Description of the Related Art A conventional brush movement detecting device of this type is
As shown in FIG. 10, the rotating shaft 3 is rotatably supported in the groove 2 of the brush main body 1, and the rotating shaft 3 is fixed with wheels 4 that rotate in contact with the floor surface. ..

A rotary encoder 5 having a plurality of light shielding plates is fixed to one end of the rotary shaft 3, and a transmissive optical sensor 6 facing the rotary encoder 5 is turned on or off by the light shielding plate of the rotary encoder. Are arranged.

Next, the operation will be described.

In the case of cleaning with an electric vacuum cleaner, when an operator operates the hose portion to move the brush portion, the wheel 4 comes into contact with the floor surface and rotates, and the rotary encoder 5 rotates together with the wheel 4. ..

The optical sensor 6 is turned on or off by the light shielding plate of the rotary encoder 5 according to the rotation of the rotary encoder 5 to detect the movement of the brush portion.

[0007]

Since the conventional brush movement detecting device for the electric vacuum cleaner is constructed as described above,
When the brush portion is equipped with a power brush driven by a brush motor, the rotation shaft 3 is vibrated by the vibration of the brush motor.
May rotate, and the optical sensor 6 may malfunction. Further, there is a problem that the optical sensor 6 malfunctions when the light shielding plate stops at a delicate position for sensing.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the invention of claim 1 is to detect the brush movement of an electric vacuum cleaner in which the rotary shaft does not easily rotate due to the vibration of the brush motor. The purpose is to obtain the device.

It is another object of the present invention to provide a brush movement detecting device for an electric vacuum cleaner in which the rotating shaft does not easily rotate due to the vibration of the brush motor and the light shielding plate does not stop at a delicate position for sensing. To do.

[0010]

According to a first aspect of the present invention, there is provided a brush movement detecting device for an electric vacuum cleaner, comprising a rotating shaft rotatably supported by a brush body, and a floor fixed to the rotating shaft. A rotary encoder including a wheel that comes into contact with the rotary shaft, a plurality of light shield plates that are fixed to one end of the rotary shaft and rotate integrally with the rotary shaft, and an optical sensor that is turned on or off by the light shield plate of the rotary encoder. The brush movement sensor is provided, and the other end of an elastic body, one end of which is fixed to the brush portion main body, is pressed against the rotating shaft.

According to a second aspect of the present invention, there is provided a brush movement detecting device for an electric vacuum cleaner, in which a rotating shaft rotatably supported by a brush main body and a rotating shaft fixed to the rotating shaft are in contact with a floor surface. Brush movement including a wheel, a rotary encoder that is fixed to one end of the rotary shaft, and includes a plurality of light blocking plates that rotate integrally with the rotary shaft, and an optical sensor that is turned on or off by each light blocking plate of the rotary encoder. It is characterized in that it is provided with a sensor and provided with a moderation mechanism for regulating the stop position of the rotary encoder.

[0012]

According to the brush movement detecting device of the vacuum cleaner of the present invention, when cleaning with the vacuum cleaner,
When an operator operates the hose section to move the brush section, the wheels come into contact with the floor surface and rotate, the rotary encoder also rotates integrally with the wheel, and the optical sensor is turned on or off by the light-shielding plate of the rotating rotary encoder. Then, the movement of the brush part is detected. At this time, the rotating shaft is not easily rotated due to vibration of the motor due to an increase in frictional force due to the elastic body pressed against the rotating shaft.

In the brush movement detecting device for the electric vacuum cleaner according to the second aspect of the present invention, when the operator operates the hose portion to move the brush portion when cleaning with the electric vacuum cleaner, the wheels come into contact with the floor surface. Then, the rotary encoder also rotates together with the wheel, and the optical sensor is turned on or off by the light shield plate of the rotary encoder by the rotation of the rotary encoder to detect the movement of the brush portion. When the rotary encoder stops, the moderation mechanism regulates the stop position of the rotary encoder, so that the light shield does not stop at the delicate position of sensing.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the invention described in claim 1 will be described below with reference to the drawings.

As shown in FIG. 1, the brush movement detecting device has a rotary shaft 3 rotatably supported by a bearing 7 in a groove 2 of a brush main body 1, and the rotary shaft 3 has a floor surface. Wheels 4 that rotate in contact with are fixed.

A rotary encoder 5 having a plurality of light shielding plates is fixed to one end of the rotary shaft 3, and the transmission type optical sensor 6 facing the rotary encoder 5 is turned on or off by the light shielding plate of the rotary encoder. Are arranged.

Further, a coil spring 8 as an elastic body is fixed to the brush main body 1, and the tip end of the coil spring 8 is pressed against the rotating shaft 3, whereby the rotating shaft 3 and the bearing 7 are connected. Friction is increasing.

Next, the operation of this embodiment will be described.

In the case of cleaning with an electric vacuum cleaner, when an operator operates the hose portion to move the brush portion, the wheel 4 comes into contact with the floor surface and rotates, and the rotary encoder 5 also rotates integrally with the wheel 4. ..

The optical sensor 6 is turned on or off by the light shielding plate of the rotary encoder 5 by the rotation of the rotary encoder 5, and detects the movement of the brush portion.

At this time, the rotating shaft 3 does not easily rotate due to the vibration of the brush motor (not shown) due to the increase of the frictional force with the bearing 7 due to the coil spring 8 pressed against the rotating shaft 3.

As a result, malfunction of the optical sensor 6 is prevented.

In the above embodiment, the coil spring 8 is used as an elastic body by way of example. However, the elastic body is not limited to this, and the leaf spring 9 may be pressed against the end of the rotary shaft 3 as shown in FIG. However, the same effect is obtained.

By doing so, the leaf spring 9 can be fixed to the brush portion main body 1 with the screw 10 or the like, and the assembling can be facilitated.

As shown in FIG. 3, when the brush 1 is provided at the edge of the rotary encoder 5, the light emitting portion and the light receiving portion of the optical sensor 6 can be cleaned every time the rotary encoder 5 rotates. It is possible to prevent malfunction of the optical sensor 6 due to dust or the like.

FIG. 4 shows an embodiment of the present invention as set forth in claim 2. On the brush body 1 below the rotary encoder 5, a protrusion 1 having a T-shape in side view, which constitutes a moderating mechanism, is formed.
1 is bonded, and the protrusion 11 is made of a soft material such as vinyl chloride or rubber.

Next, the operation of this embodiment will be described.

Since the operation of cleaning with the electric vacuum cleaner is the same as that of the above-mentioned embodiment, detailed description will be omitted. In this embodiment, each light shield plate 5a of the rotary encoder 5 rides over the T-shaped projection 11 and rotates.

When the wheel 4 is stopped, the rotary encoder 5 is rotated in the rotation direction by the elastic force of the T-shaped projection 11 and stopped at the position shown in FIG.

As a result, the light shielding plate 5a does not stop at a delicate sensing position, and the optical sensor 6 is prevented from malfunctioning.

Further, in the stopped state, the T-shaped projection 11 prevents the rotary encoder 5 from rotating, and the rotary encoder 5 does not rotate due to the vibration of the brush motor.

In the above embodiment, the T-shaped projection 11 constituting the moderation mechanism is adhered to the brush main body 1, but the present invention is not limited to this, and as shown in FIG.
Alternatively, the U-shaped groove portion 12 may be integrally formed, and the base portion 11a of the T-shaped protrusion 11 may be fitted into the U-shaped groove portion 12 to fix the protrusion.

By doing so, the T-shaped projection 11 can be easily fixed to the brush main body 1 and the assembly can be facilitated.

Further, in the above-mentioned embodiment, the moderation mechanism is constituted by the T-shaped projection 11, but the invention is not limited to this, and as shown in FIGS. 7 and 8, the respective shading plates 5a of the rotary encoder 5 are provided. It is also possible to dispose the magnetic body 13 on the outer periphery, provide the magnetic body 14 on the brush main body 1 below the rotary encoder 5, and configure the moderating mechanism by the elastic bodies 13 and 14.

By doing so, it is possible to eliminate the load of the light shielding plate 5a overcoming the T-shaped projection 11 and rotating.

Further, if the rotary encoder 5 itself is made of a magnetic material, the labor of attaching the magnetic material 13 to the light shielding plate 5a can be omitted.

Further, as shown in FIG. 9, the brush portion main body 1
If the brush 15 is provided at a position facing the upper rotary encoder 5, the light shielding plate 5a can be cleaned every time the rotary encoder 5 rotates, and the inclusion of dust or the like is reduced to prevent the optical sensor 6 from malfunctioning. be able to.

[0038]

As described above, according to the first aspect of the present invention, since the other end of the elastic body whose one end is fixed to the brush main body is brought into pressure contact with the rotary shaft, it is rotated by the vibration of the brush motor. It is possible to prevent the shaft from rotating and prevent the optical sensor from malfunctioning.

Further, according to the second aspect of the invention, since the stop position of the rotary encoder is regulated by the moderation mechanism, the rotation shaft is prevented from rotating due to the vibration of the brush motor, and the light shielding plate is provided. Can be prevented from stopping at a delicate position for sensing, and the optical sensor can be prevented from malfunctioning.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a brush movement detection device for an electric vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a brush movement detecting device for an electric vacuum cleaner according to another embodiment of the present invention.

FIG. 3 is a side view of a part of the rotary encoder according to this embodiment.

FIG. 4 is a cross-sectional view showing a brush movement detection device for an electric vacuum cleaner according to an embodiment of the present invention.

FIG. 5 is a side view showing a moderation mechanism according to this embodiment.

FIG. 6 is a side view showing a moderation mechanism according to another embodiment of the present invention.

FIG. 7 is a side view showing a brush movement detecting device for an electric vacuum cleaner according to another embodiment of the present invention.

FIG. 8 is a side view showing a moderation mechanism according to another embodiment.

FIG. 9 is a side view of a part of a rotary encoder according to another embodiment.

FIG. 10 is a cross-sectional view showing a conventional brush movement detection device for an electric vacuum cleaner.

[Explanation of symbols]

 1 Brush Main Body 3 Rotation Shaft 4 Wheel 5 Rotary Encoder 6 Optical Sensor 11 Protrusion 12 U-Shaped Groove 13, 14 Magnetic Material

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Yutaka Takahashi 1728 Omaeda, Omaeda, Ozono-gun, Saitama Prefecture 1728 Mitsubishi Electric Home Equipment Co., Ltd. (72) Hiroshi Taguchi 1728 Omaeda, Omaeda, Oza-gun, Saitama Prefecture Mitsubishi Electric Home Equipment Co., Ltd. (72) Inventor, Koji Ren, 1728 Omaeda, Omaeda, Hanazono-cho, Saitama-gun Saitama Prefecture 1 (72) Inventor, Akihiro Iwahara, 1728, Omaeda, Hanazono-cho, Saitama-gun Mitsubishi Electric Home Equipment Co., Ltd. (72) Inventor Hidetoshi Yoshifuku 1728 Omaeda, Hanazono-cho, Osato-gun, Saitama Prefecture 1728 1 Mitsubishi Electric Home Equipment Co., Ltd. Tomohisa Imai 1728 Omaeda, Hanazono-cho, Osato-gun, Saitama Prefecture (72) Inventor Masafumi Nagata Univ. Of Kamakura City, Kanagawa Prefecture 2-14-40 Funa Electric Co., Ltd. Living Systems Research Laboratories (72) Inventor Yosaku Otsuka 2-14-40 Ofuna Ofuna, Kamakura City, Kanagawa Within Living Systems Research Laboratories Mitsubishi Electric Corporation

Claims (2)

[Claims] 1. A brush movement detection device for an electric vacuum cleaner, comprising a brush movement sensor for connecting a brush to a tip of a hose portion connected to the cleaner body and detecting movement of the brush portion. A rotating shaft supported by
Wheels that are fixed to the rotating shaft and rotate in contact with the floor surface, a rotary encoder that is fixed to one end of the rotating shaft and that includes a plurality of light shielding plates that rotate integrally with the rotating shaft, and each of the rotary encoders. ON by light shield
Alternatively, the brush movement sensor is configured by an optical sensor that is turned off, and the other end of an elastic body whose one end is fixed to the brush portion main body is pressed against the rotation shaft. .. 2. A rotary shaft rotatably supported by the brush main body, wheels fixed to the rotary shaft and rotating in contact with the floor surface, and fixed to one end of the rotary shaft integrally with the rotary shaft. A brush movement sensor is constituted by a rotary encoder composed of a plurality of rotating light shield plates and an optical sensor which is turned on or off by each light shield plate of the rotary encoder, and a moderation mechanism for restricting a stop position of the rotary encoder is provided. A brush movement detection device for an electric vacuum cleaner characterized by the above.