JPH07171079A - Winding device for power source cord, method for preventing damage of power source cord wound around the same and electric equipment and electric vacuum cleaner with the winding device - Google Patents

Abstract

PURPOSE:To prevent the damage of a cable conductor due to the excess tension applied on the part of starting winding by stopping pulling the power source cord by a control part when a cord pulling position is detected. CONSTITUTION:When the cleaning is advanced and a power source cord 7 is pulled out to reach the part starting winding, a mark 13 is appeared on the power cord 7. At time, a mechanism 12 for detecting the pulling position of the cord detects a pre-notice point P magnetically and outputs a detection signal to a control part 15. Then a buzzer 17 is sounded and a display lamp 18 is flivered. At the same time, the control part 15 decreases the number of revolution of a driving motor 8. The control part 15 stops the rotation of the driving motor 8 through a driving circuit based on the detection signal, at need. Thus, the excess pulling of the power cord 7 is actively reported by the sound and light. A reporter passively deetects the report to recognize the abnormal state. As the result, the generation of fault due to the disconnection, etc., of the power cord 7 at the part of starting winding can surely be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power cord take-up device, and more particularly, to prevent damage to a take-up device such as a cord reel and a winding start portion of a power cord wound on the take-up device. The present invention relates to a method for preventing damage to a power cord, and an electric device such as an electric vacuum cleaner having a cord reel type power cord.

[0002]

2. Description of the Related Art FIGS. 12 to 14 are explanatory views of the structure of a conventional device, FIG. 12 is a plan view of the device disclosed in Japanese Utility Model Laid-Open No. 174148/1984, and FIG. FIG. 14 is a partially cutaway side view of the traveling vacuum cleaner, and FIG. 14 is a detailed vertical sectional side view of a main part of the self-propelled cleaning machine of FIG.

In FIG. 12, 1 is an electric product, 2 is a code reel, 3 is a code, 4 is a warning display mark indicating that the withdrawal limit of the code 3 has been reached, and 4a is a notice display indicating that the withdrawal limit is approaching. It is a mark. The display marks 4 and 4a are displayed by an adhesive tape or a transfer foil, and the display marks 4 and 4a are displayed in red and yellow, for example. The cord 3 is pulled out from the cord reel 2 of the electric appliance 1 so as not to exceed the pull-out limit while looking at the red or yellow display marks 4, 4a on the cord 3.

13 and 14, 1 is a main body, 2 is a base part, 3 is a cord winding part, 4 is a dust collecting part, 5 is a code reel driving part, 8a and 8b are wheel units, 10
Is a suction tool, and 15 is a cylindrical column. 41 is a power cord,
42 is a cord reel that winds the power cord 41 in a line. The cord reel 42 is rotatably supported by the cylindrical column 15. Reference numeral 54 is a cord reel motor, and 55 is a clutch mechanism. The clutch mechanism 55 has a function of a limiter that transmits a rotation torque to the cord reel motor 54,
Tension in the winding direction is constantly applied to the power cord 41.

Reference numeral 73 is a cord end detection switch, which comprises a steel ball 75 protruding into the cord reel 42 from the detection hole and a micro switch. Then, depending on the presence or absence of the power cord 41 wound in a line on the cord reel 42, the steel balls 7
5 moves to turn on / off the switches of the wheel units 8a and 8b. Reference numeral 88 is a locking device provided with a weight, 91 is an equipment outlet, 93 is an ordinary plug, and 94 is a plug with a hook that is inserted into the equipment outlet 91. The locking device 88 is connected to the end of the power cord 41, and the plug 93
And make sure that the wall surface of the room is locked with the outlet.

In the self-propelled vacuum cleaner shown in FIGS. 13 and 14, the power cord 41 is pulled out from the cord reel 42, the plug 93 at the tip of the locking device 88 is connected to the outlet on the wall of the room, and the power switch is turned on. Turn on. Then,
Commercial power is supplied to the cleaner body 1. When the cleaning start button is pressed, the cord reel 42 becomes free,
The automatic cleaning traveling by the suction tool 10 of the main body 1 is started.

When the main body 1 is separated from the wall outlet at the start of automatic running, the power cord 41 is automatically pulled out against the tension, and when approaching, the cord reel 4 is pulled by the tension.
It is automatically wound to 2. When the power cord 41 wound in a row is pulled out from the cord reel 42,
The end detection switch 75 is turned on to turn the wheel units 8a, 8
The switch of b is turned off to stop the traveling of the main body 1 so that excessive tension is not applied to the power cord 41.

[0008]

As described above, the conventional cord reel of FIG. 12 has the red or yellow display marks 4 and 4a on the cord 3 to prevent the cord 3 from being pulled out beyond the limit. Has become. Therefore, code 3
Active special care is required to monitor the indicia 4,4a when pulling out. Further, when the conventional cord reel of FIG. 12 is applied to an electric vacuum cleaner, the cord 3 that is soiled by being caught on the floor surface during cleaning is wound around the reel 2, so that the marks 4 and 4a are soiled. It is easy to become unclear. If carelessness or obscure marks 4 and 4a are overlooked, the cord 3 may be wound up beyond the pull-out limit, and a failure such as disconnection may occur.

Further, in the self-propelled cleaner shown in FIGS. 13 and 14, the end detection switch 75 is operated while the main body 1 is automatically traveling.
This prevents the main body 1 from running and prevents excessive tension from being applied to the power cord 41. However, since the end detection switch 75 operates depending on the presence or absence of the power cord 41 wound in a line, the diameter of the cord reel 42 is large and the entire device tends to be large. Also, power cord 4
End detection switch 75 when the drawer of 1 reaches the end
There is a drawback in that the function for recognizing a dangerous state is extremely weak because the main body 1 is simply stopped by the operation of.
Moreover, since the power cord 41 can be cleaned as it is while it is pulled out for a long time, the power cord 41 is further pulled out by continuing the cleaning, and the failure occurrence rate is as high as that of the conventional cord reel of FIG. However, there is a problem that the life of the device is shortened.

The present invention has been made in order to solve the problems of the conventional cord reel and the electric vacuum cleaner, and when the power cord pulls out to a certain position, it passively emits sound or light to the surroundings. An electrical device that can detect long-term use and has a low rate of failure such as contact failure at the winding part of the power cord or disconnection etc. The purpose is to realize.

[0011]

SUMMARY OF THE INVENTION According to the present invention, a cord winding means for winding a power cord by a rotational force of a drive source, and a pull-out position detecting means for detecting a pull-out position of a power cord wound around the cord wind means. And an alarm means for issuing an alarm according to the pull-out position of the power cord detected by the pull-out position detection means, and a cord pull-out stop for stopping the pull-out of the power cord according to the pull-out position of the power cord detected by the pull-out position detection means And a means for winding a power cord, which comprises:

According to the present invention, the pull-out position detecting means detects the pull-out position of the power cord wound around the cord winding means by the drive source, and the alarm means generates an alarm in accordance with the pull-out position of the power cord to generate the cord. This is a method of preventing damage to the power cord by stopping the pulling of the power cord by the pull-out stopping means to prevent damage to the winding start portion of the power cord.

According to the present invention, the tension detector for detecting the tension of the power cord and the power cord is automatically operated through the torque transmission mechanism when the tension detected by the tension detector by the rotational force of the drive source is less than the reference value. A cord winding means, a cord pulling means for automatically pulling out the power cord through the torque transmission mechanism when the tension detected by the tension detector by the rotational force of the drive source is equal to or higher than a reference value, and a cord pulling means. Pull-out position detecting means for detecting the pull-out position of the power cord pulled out by, the alarm means for issuing an alarm according to the pull-out position of the power cord detected by the pull-out position detecting means, and the power cord detected by the pull-out position detecting means The electrical equipment is provided with a cord withdrawing stopping means for stopping the withdrawal of the power cord according to the pulling position of the power cord.

According to the present invention, the electric blower, the tension detector for detecting the tension of the power cord, and the power cord through the gear mechanism when the tension detected by the tension detector due to the rotational force of the motor is below the reference value. The cord reel that automatically winds up, the drive roller that automatically pulls out the power cord via the gear mechanism when the tension detected by the tension detector due to the rotational force of the motor is above the reference value, and the drive roller that pulls it out of the cord reel. Pull-out position detection mechanism that detects the vicinity of the pull-out limit point of the power cord, alarm means that issues an alarm according to the pull-out position of the power cord detected by the pull-out position detection mechanism, and power cord detected by the pull-out position detection mechanism The electric vacuum cleaner is provided with a cord withdrawing stopping means for stopping the withdrawal of the power cord according to the pulling position of the power cord. Further, the electric vacuum cleaner is configured to generate an alarm sound and / or an alarm light by the alarm means. Also,
The electric vacuum cleaner is configured to change the alarm of the alarm means continuously or intermittently according to the length of pulling out the power cord. Also, the electric vacuum cleaner is configured to increase the alarm of the alarm means continuously or intermittently according to the length of the power cord pulled out. Further, the electric vacuum cleaner is provided with a rotational force switching mechanism for switching the rotational force of the motor between the cord reel and the drive roller when the tension detected by the tension detector changes above and below the reference value. Further, the electric vacuum cleaner comprises a cord winding means for automatically winding the power cord to a safety point before it exceeds the limit point. Further, the electric vacuum cleaner is provided with a mark formed on the power cord as the pull-out position detecting means and a mark detector for detecting the mark. Further, the electric vacuum cleaner is provided with a cord length detector for detecting the length of pulling out the power cord as the pulling-out position detecting means.

According to the present invention, the electric blower, the tension detector for detecting the tension of the power cord, and the power cord through the gear mechanism when the tension detected by the tension detector by the rotational force of the motor is less than the reference value. The cord reel that automatically winds up, the drive roller that automatically pulls out the power cord via the gear mechanism when the tension detected by the tension detector due to the rotational force of the motor is above the reference value, and the drive roller that pulls it out of the cord reel. An electric vacuum cleaner provided with a pull-out position detection mechanism for detecting the vicinity of the pull-out limit point of the extracted power cord, and a blower control means for controlling the blow of the electric blower according to the pull-out position of the power cord detected by the pull-out position detection mechanism. Is configured. Further, the electric vacuum cleaner is configured to generate an air blower sound and also serve as an alarm sound.

According to the present invention, an electric blower, a cord reel for winding a power cord with a full force of winding, a pull-out position detecting mechanism for detecting the vicinity of the pull-out limit point of the power cord wound on the cord reel, and a pull-out portion. An alarm means for issuing an alarm according to the position of the power cord detected by the position detection mechanism, and a cord withdrawing stop means for stopping the withdrawal of the power cord according to the withdrawal position of the power cord detected by the withdrawal position detection mechanism. This is a configuration of the provided electric vacuum cleaner.

According to the present invention, an electric blower provided in the main body, a cord reel in which a power cord is wound by a winding force of a motor or a full dance, and the vicinity of a pull-out limit point of the power cord wound in the cord reel are detected. The pull-out position detection mechanism, an alarm unit that issues an alarm according to the pull-out position of the power cord detected by the pull-out position detection mechanism, and the pull-out of the power cord according to the pull-out position of the power cord detected by the pull-out position detection mechanism. A cord pull-out stopping means for stopping, a cord reel and a motor are arranged in the rear space of the main body to constitute an electric vacuum cleaner.

[0018]

The function of the present invention is to start the cleaning of a large room with the automatic cord pull-out type vacuum cleaner. Since the room is large, the cleaning radius expands to that extent, and cleaning can be done away from the wall outlet. By moving the vacuum cleaner, the power cord is pulled out for a long time, and is extended to near the beginning of winding the cord reel. When the unwound power cord is near the beginning of winding, the mark on the power cord appears. At this time, the code pull-out position detection mechanism detects the predictive point of the mark.

The control unit reduces the rotation speed of the electric blower based on this detection signal. At the same time, the buzzer sounds and the indicator lamp also blinks to notify of a dangerous state. Further, sometimes when the cord pull-out position detection mechanism detects a prediction point, the control unit stops pulling out the power cord. In this way, the power cord is pulled out from the main body beyond the limit with a sound or light warning, and the excessive tension applied to the beginning of the winding prevents damage due to disconnection of the core wire connection. .

[0020]

【Example】

Example 1. FIG. 1 is an internal structure diagram of an embodiment of the present invention, and FIG. 2 is a side view of a part of the embodiment of the present invention, showing a case where the present invention is applied to an electric vacuum cleaner. 1 and 2, in FIG.
Is a main body of the electric vacuum cleaner, 2 is a large left and right rear wheel, and 3 is an electric blower. The electric blower 3 includes a blower 3 for blowing air.
A and motor 3b are built in. Although not shown, a suction port with a lid is provided on the upper surface on the opposite side of the main body 1, and a caster-shaped small front wheel capable of changing direction is attached to the bottom surface. The electric blower 3 communicates with the suction port, and a dust collecting bag opened at the suction port on the way is housed in a replaceable manner.

Reference numeral 4 is a plug, 5 is a power supply cord, 6 is a tension detector, and 7 is a power cord. FIG. 3 shows an example of the principle configuration of the tension detector 6. In FIG. 3, by compressing the length of a part of the sections 71 and 72 of the power cord 7 (or the power cord 5),
A short linear ferromagnetic body 73 is connected in the sections 71 and 72. A magnetic field H is applied to the ferromagnetic body 73. 74
Is a setting spring whose elastic force is adjustable. Power cord 7
Thus, when the tension F is applied to the ferromagnetic body 73, the voltage E corresponding to the tension F is generated due to the inverse magnetostrictive effect. The change in the generated voltage E detects the tension F applied to the power cord 7.

The detected tension F is ranked by the setting spring 74 into, for example, three levels of "zero", "medium", and "strong", and when the tension F is F = 0, the setting spring 74 is used. It is set to the standard value "medium". In addition, a piezoelectric element such as lithium niobate may be used instead of the ferromagnetic material 73 to detect the tension F by utilizing the piezoelectric effect.

Reference numeral 8 is a drive motor, 9 is a torque transmission mechanism composed of a gear train, 10 is a cord reel, and 11 is a cord pull-out mechanism. As the drive motor 8, in addition to an ordinary AC motor, a DC brushless motor or a universal motor whose rotation speed can be controlled may be used. Reference numeral 91 is a motor gear, 92 is a reel gear, and 93 is a roller gear. The cord drawing mechanism 11 includes a driving roller 11a and a driven roller 1
1b, and a roller gear 93 is fixed to the roller shaft of the driving roller 11a. In FIG. 2, the drive motor 8 is shown coaxially with the motor gear 91 by a dotted line, but the output shaft of the drive motor 8 is arranged coaxially with the cord reel 10 as shown in FIG. It is connected. Although not shown in detail, a one-way clutch is provided between the roller gear 93 and the drive shaft.

Reference numeral 12 is a cord pull-out position detecting mechanism. As shown in FIG. 4, the cord pull-out position detection mechanism 12 is
It comprises a mark 13 and a mark detector 14. Mark 13
Among the detectors using light, sound, etc., here, a magnetic mark for a magnetic detector that is less affected by dirt and the like is used. The mark 13 is provided in the vicinity of the winding start of the power cord 7 at a mark point P which is predetermined and predicts a limit point for pulling out the cord. Then, the mark point P approaches the mark detector 14 as the power cord 7 is extended,
The prediction point P is magnetically detected.

Reference numeral 15 is a control unit. 16 is an alarm mechanism, 1
Reference numeral 7 is a buzzer of the alarm mechanism 16, and reference numeral 18 is a display lamp.
A control board is provided on the back side of the control unit 15, and the buzzer 1
6 and a display lamp 17 are attached. Further, on the control board, an electronic circuit such as a drive circuit 15a for controlling the drive motor 8 and the blower motor 3b, as well as a microcomputer having an arithmetic operation and a memory function are mounted. Then, based on the outputs of the tension detector 6 and the cord pull-out position detection mechanism 12, the alarm mechanism 16, the drive motor 8, the blower motor 3b and the like are controlled.

The operation of the first embodiment of the present invention thus constructed will be described below with reference to FIG. A hose is connected to the suction port of the main body 1 and a floor brush is connected to the end of the extension pipe. After pulling out the power cord 7 slightly, insert the plug 4 at the end of the power cord 5 into an outlet on the wall of the room. When the hand switch is turned on, the electric blower 3 is driven to start floor cleaning, and the main body 1 moves forward together with the floor brush. When the power cord 7 is pulled by the forward movement of the main body 1 and the tension F detected by the tension detector 6 becomes “strong”, a detection signal is sent to the control unit 15.
Is output to drive the drive motor 8. The rotation of the drive motor 8 is transmitted to the drive roller 11a of the cord pullout mechanism 11, and the power cord 7 is fed out in accordance with the forward movement of the main body 1.

When the floor brush advances and then retreats, the tension F applied to the power cord 7 decreases from "medium" to "0". At this time, the drive signal of the control unit 15 causes the drive motor 8 to rotate in the opposite direction. At the same time, the drive roller 11a
The power cord 7 is wound around the cord reel 10 while being idle and spinning. Then, when the main body 1 moves forward together with the floor brush, the tension detector 6 detects the tension "strong" as described above, and the power cord 7 is again fed by the drive roller 11a. In this way, the power cord 7
The length of the cord expands and contracts as the main body 1 moves forward and backward, and the floor surface is cleaned by the floor brush while always maintaining a cord length substantially equal to the distance from the outlet of the main body 1.

When the cleaning of a large room is started, the cleaning radius is expanded and the floor separated from the wall outlet is also cleaned.
Then, the power cord 7 is pulled out for a long time by the movement of the main body 1, and is extended near the beginning of winding of the cord reel 10. When cleaning progresses and the power cord 7 is pulled out to approach the beginning of winding, the mark 13 on the power cord 7 appears. At this time, the cord pull-out position detection mechanism 12
The mark detector 14 of 6 magnetically detects the prediction point P of the mark 13.

When the cord pull-out position detection mechanism 12 magnetically detects the prediction point P, a detection signal is output to the control unit 15 to make the buzzer 17 sound and the display lamp 18 to blink. At the same time, the control unit 15 reduces the rotation speed of the drive motor 8. Further, if necessary, the control unit 15 stops the rotation of the drive motor 8 via the drive circuit 15a based on this detection signal. In this way, since the pulling-out limit of the power cord 7 is notified by active sound or light, the user passively perceives this notification and recognizes the abnormal state. As a result, it is possible to prevent the occurrence of a failure due to disconnection of the winding start portion of the power cord 7 and the like.

It is also possible to control the rotation of the blowing motor 3b of the electric blower 3 to reduce or stop the blowing noise. According to this structure, not only can the dangerous state be recognized by the change in the two phenomena of the air blow of the main body 1 and the deterioration of the dust collecting function, but also the alarm sound of the alarm mechanism 16 can be used as the sound of the air blow. It has the feature that the structure can be simplified.

Modification 1 of Embodiment 1 FIG. 6 is an explanatory view of a modification of Embodiment 1 of the present invention. In this embodiment, three marks 13 of the cord pull-out position detecting mechanism 12 are formed. The three marks 13a to 13b are formed in the vicinity of the winding start of the power cord 7 at mark points P3 to P1 which are sequentially spaced from the winding start side. Mark points P1 to P3 are the limit points P3 for pulling out the cord, respectively.
And its prediction point P2 and the safety point P1 corresponding to the maximum position in the safety zone. As the drive motor 8 of this modification, the above-mentioned DC brushless motor, universal motor, or the like is used.

In the modified example 1 of FIG. 6, the cord reel 1
As the power cord 7 is fed from 0, mark point P1
.About.P3 successively appear and approach the mark detector 14. The mark detector 14 detects the first appearing safety point P1 and then successively detects the prediction point P2 and the limit point P3. Then, similarly to the above, the detection signal is output to the control unit 15, the buzzer 17 is blown, and the display lamp 18 is blinked.

However, in this case, as shown in FIG. 7, the P command of the drive circuit 15a is generated by the operation command from the control section 15 which receives the detection signal of the cord pull-out position detecting mechanism 12.
The rotation number of the drive motor 8 of the DC brushless motor or the universal motor is sequentially decreased by the WM control or the phase control and stopped at the limit point P3. Further, the sound of the buzzer 17 gradually increases, and the display lamp 18 blinks from coarse to dense to strengthen the warning of the power cord 7 being pulled out excessively according to the degree of danger.

Further, by utilizing the three mark points P1 to P3 and the control section 15 having a memory function, it is possible to bring back to the safe area as follows. As the cleaning progresses, the power cord 7 is fed from the cord reel 10, and the mark detector 14 detects the limit point P3 as shown in FIG. 8 (a). At this time, the alarm mechanism 16 operates and a detection signal is sent to the control unit 15, and the drive motor 8 rotates in the reverse direction by the control operation.
Then, as shown in (b), the power cord 7 is the cord reel 1.
When the mark detector 14 is rewound to 0, the mark detector 14 is in the safe area.
Is detected, the feeding of the power cord 7 is stopped.

In addition, instead of the buzzer 17, a human voice, music or the like can be used. Also, the blower motor 3
The rotation of b may be reduced, the rotation of the blowing motor 3b may be stopped, or the rotation speed may be periodically changed. Further, when the mark detector 14 detects the limit point P3, the brake of the braking mechanism (not shown) is operated to activate the cord reel 10.
It is also possible to stop the rotation of the drive motor and turn off the drive motor 8.

Another modification of the first embodiment of the present invention is shown in FIG.
Is shown in. The difference from the first embodiment is that the mark 13 and the mark detector 14 of the cord pull-out position detecting mechanism 12 are eliminated and the encoder 21 is connected to the rotary shaft of the cord reel 10. When the code reel 10 rotates, the encoder 21 generates a pulse corresponding to the rotation angle and the number of rotations. Therefore, it is possible to detect the unmarked limit point P3 and the like by counting the output pulses of the encoder 21 and comparing this output with the pull-out length of the power cord 7 stored in the control unit 15 in advance.

FIG. 10 is a structural explanatory view of still another modified example.
The vicinity of the torque transmission mechanism 9 having a configuration different from the above is shown. In FIG. 10, 94 is a switching motor, and 95 is a switching arm that swings by the switching motor 94. Switching arm 9
A motor gear 91 is attached to the swinging end of 5.
When the switching motor 94 is driven, the switching arm 95 swings so that the motor gear 91 moves to the roller gear 93 and the reel gear 92.
It can be switched to. Note that FIG.
In the above configuration, the one-way clutch mechanism built in the roller gear 93 in the first embodiment is omitted.

In the configuration of FIG. 10, in the normal state, the switching arm 95 is at the position indicated by the chain double-dashed line, and the motor gear 91 meshes with the roller gear 93. As in the case of the first embodiment, when the tension detector 6 detects "strong" of the tension F as the main body 1 moves forward, the drive motor 8 is driven by the control unit 15 to rotate the drive roller 11a and the power cord 7 becomes 2 It is paid out as shown by the dotted line arrow.

When the tension F applied to the power cord 7 decreases to "0", the switching motor 94 is driven and the switching arm 95 swings in the direction of the arrow to switch the meshing of the motor gear 91 to the reel gear 92 side. . At the same time, the drive roller 11a becomes free, the drive motor 8 rotates counterclockwise, and the power cord 7 is wound around the cord reel 10. Since the torque transmission mechanism 9 is switched in this manner, winding and unwinding are performed with the power cord 7 in a tensioned state at the unwinding portion of the cord reel 10, as in the case of FIG. As a result, the cord reel 10 and the cord pull-out mechanism 1
There is no slack in the power cord 7 between 1 and the encoder 2
The output of No. 1 can always be kept the same as the feeding amount of the power cord 7.

FIG. 1 shows the configuration of another application example of the embodiment of the present invention.
Shown in 1. In FIG. 11, 22 is the total dance. In FIG. 11 of the third embodiment, instead of the drive motor 8 of FIG.
Is arranged, and the tension detector 6, the torque transmission mechanism 9, and the cord pull-out mechanism 11 are omitted. The components other than these are denoted by the same reference numerals as those in FIG. 1, and the structure is a well-known vacuum cleaner of a full dance type cord reel.

Reference numeral 22 is a drive source for generating the rotation torque of the cord reel 10, and is wound when the power cord 7 is pulled out by an external force, and is rewound to wind the power cord 7 on the cord reel 10. The encoder 21 of FIG. 9 may be provided outside the cord pull-out position detection mechanism 12 using the mark 13 as shown in FIG. The operation of detecting the limit point P3 and the like of the power cord 7 is the same as that described above, and thus the description of the operation is omitted.

Although the above-described embodiment of the present invention has been described by exemplifying the case of the electric vacuum cleaner, the present invention is also applied to the case of electric equipment such as an electric rice cooker or an electric iron whose power cord is wound around a cord reel. Can be applied. In addition, in the vacuum cleaner using Zenmai 22, by preparing a backup power source, it is possible to prevent the power cord 7 from exceeding its limit when pulled out. Further, an electric device in which the cord reel is separated from the electric vacuum cleaner (for example, JP-A-60-12253).
The present invention can be applied to 3), and the structure of the cord reel is not necessarily limited to the embodiment.

[0043]

According to the present invention, the cord winding means for winding the power cord by the rotational force of the drive source, the pulling position detecting means for detecting the pulling position of the power cord wound around the cord winding means, and the pulling position. An alarm means is provided for issuing an alarm in accordance with the pull-out position of the power cord detected by the detecting means, and a cord pull-out stopping means for stopping pull-out of the power cord according to the pull-out position of the power cord detected by the pull-out position detecting means. And a winding device for the power cord.

According to the present invention, the pull-out position detecting means detects the pull-out position of the power cord wound around the cord winding means by the drive source, and the alarm means generates an alarm in accordance with the pull-out position of the power cord to generate the cord. We adopted a power cord damage prevention method that stops the power cord from being pulled out by the pull-out stopping means to prevent damage to the winding start part of the power cord.

According to the present invention, the tension detector for detecting the tension of the power cord and the power cord is automatically transmitted through the torque transmission mechanism when the tension detected by the tension detector by the rotational force of the drive source is less than the reference value. A cord winding means, a cord pulling means for automatically pulling out the power cord through the torque transmission mechanism when the tension detected by the tension detector by the rotational force of the drive source is equal to or higher than a reference value, and a cord pulling means. Pull-out position detecting means for detecting the pull-out position of the power cord pulled out by, the alarm means for issuing an alarm according to the pull-out position of the power cord detected by the pull-out position detecting means, and the power cord detected by the pull-out position detecting means The electrical equipment is provided with a cord withdrawing stop means for stopping the withdrawal of the power cord according to the pulling position of the power cord.

According to the present invention, the electric power blower, the tension detector for detecting the tension of the power cord, the power cord through the gear mechanism when the tension detected by the tension detector by the rotational force of the motor is less than the reference value. The cord reel that automatically winds up, the drive roller that automatically pulls out the power cord via the gear mechanism when the tension detected by the tension detector due to the rotational force of the motor is above the reference value, and the drive roller that pulls it out of the cord reel. Pull-out position detection mechanism that detects the vicinity of the pull-out limit point of the power cord, alarm means that issues an alarm according to the pull-out position of the power cord detected by the pull-out position detection mechanism, and power cord detected by the pull-out position detection mechanism The electric vacuum cleaner is provided with a cord withdrawing stopping means for stopping withdrawal of the power cord according to the pulling position of the power cord.
In addition, an electric vacuum cleaner which generates an alarm sound and / or an alarm light by the alarm means is configured. Further, the electric vacuum cleaner configured to change the alarm of the alarm means continuously or intermittently according to the length of pulling out the power cord. Further, the electric vacuum cleaner is configured in which the alarm of the alarm means is increased continuously or intermittently according to the length of the pulled-out power cord. Further, the vacuum cleaner is provided with a rotational force switching mechanism that switches the rotational force of the motor between the cord reel and the drive roller when the tension detected by the tension detector changes above and below the reference value. Further, the electric vacuum cleaner is provided with a cord winding means for automatically winding the power cord to a safety point before it exceeds the limit point. Also, a mark formed on the power cord as a pull-out position detecting means,
An electric vacuum cleaner having a mark detector for detecting a mark was constructed. Further, the electric vacuum cleaner is provided with a cord length detector that detects the length of pulling out the power cord as the pulling-out position detecting means.

According to the present invention, the electric power blower, the tension detector for detecting the tension of the power cord, the power cord via the gear mechanism when the tension detected by the tension detector by the rotational force of the motor is less than the reference value. The cord reel that automatically winds up, the drive roller that automatically pulls out the power cord via the gear mechanism when the tension detected by the tension detector due to the rotational force of the motor is above the reference value, and the drive roller that pulls it out of the cord reel. An electric vacuum cleaner provided with a pull-out position detection mechanism for detecting the vicinity of the pull-out limit point of the extracted power cord, and a blower control means for controlling the blow of the electric blower according to the pull-out position of the power cord detected by the pull-out position detection mechanism. Configured. In addition, an electric vacuum cleaner was constructed that also serves as an alarm sound with the sound generated by the electric blower for blowing air.

According to the present invention, an electric blower, a cord reel in which a power cord is wound with a full force of winding, a pull-out position detecting mechanism for detecting the vicinity of a pull-out limit point of the power cord wound in the cord reel, and a pull-out position. An alarm means for issuing an alarm according to the position of the power cord detected by the position detection mechanism, and a cord withdrawing stop means for stopping the withdrawal of the power cord according to the withdrawal position of the power cord detected by the withdrawal position detection mechanism. The equipped vacuum cleaner was constructed.

According to the present invention, the electric blower provided in the main body, the cord reel in which the power cord is wound by the winding force of the motor or the full force, and the vicinity of the pull-out limit point of the power cord wound in the cord reel are detected. The pull-out position detection mechanism, an alarm unit that issues an alarm according to the pull-out position of the power cord detected by the pull-out position detection mechanism, and the pull-out of the power cord according to the pull-out position of the power cord detected by the pull-out position detection mechanism. An electric vacuum cleaner having a cord pull-out stopping means for stopping, a cord reel and a motor arranged in a rear space of the main body is constituted.

Therefore, like the conventional cord reel,
When the cord is pulled out, no special active attention is required to monitor the markings, which makes the handling easier. Further, even when it is applied to a cord reel of an electric vacuum cleaner and becomes unclear due to dirt, the mark is not directly monitored, and therefore the mark detection is less likely to be hindered. Further, since the noise of the electric blower changes as compared with the conventional self-propelled vacuum cleaner that merely stops the traveling of the main body, the user can quickly know the abnormal state.

Moreover, if the buzzer of the alarm device sounds or the display lamp blinks at the same time, the user can catch the occurrence of the abnormality more quickly. In addition, since the cord reel, drive motor, etc. are placed in the rear space of the large space inside the main body where the large-diameter rear wheels are attached, the space is effectively used and the cord is longer than the compact and compact form. There is also an advantage that an electric vacuum cleaner having a large cleaning radius can be constructed.

Therefore, according to the present invention, the danger of failure such as contact failure or disconnection of the winding portion is predicted by the sound and light for warning having a high notification effect, and the pulling out of the power cord is stopped if necessary. To be done. Therefore, it is possible to realize an electric device such as a power cord take-up device or a vacuum cleaner which has a low failure rate, withstands long-term use, and is compact and convenient to handle.

[Brief description of drawings]

FIG. 1 is a structural explanatory view of an embodiment of the present invention.

FIG. 2 is a partial side view of an embodiment of the present invention.

FIG. 3 is a principle explanatory diagram of a tension detector according to an embodiment of the present invention.

FIG. 4 is a principle explanatory diagram of a cord pull-out position detection mechanism.

FIG. 5 is a flowchart showing the operation of the embodiment of the present invention.

FIG. 6 is a block diagram showing the operation of the embodiment of the present invention.

FIG. 7 is an explanatory diagram of a modified example of the first embodiment of the present invention.

FIG. 8 is an explanatory diagram of another modification of the first embodiment of the present invention.

FIG. 9 is an explanatory diagram of still another modification of the first embodiment of the present invention.

FIG. 10 is an explanatory diagram of still another modification of the second embodiment of the present invention.

FIG. 11 is a structural explanatory view of a third embodiment of the present invention.

FIG. 12 is an explanatory diagram of a configuration of a conventional cord reel.

FIG. 13 is a diagram illustrating a configuration of a conventional self-propelled cleaner.

FIG. 14 is a detailed vertical cross-sectional side view of the main part of FIG.

[Explanation of symbols]

 1 Main Body 2 Rear Wheel 3 Electric Blower 4 Plug 5 Power Cord 6 Tension Detector 7 Power Cord 8 Drive Motor (Drive Source) 9 Torque Transmission Mechanism (Gear Mechanism) 10 Code Reel (Cord Winding Means) 11 Code Pulling Mechanism (Cord) Drawing-out means) 12 Code drawing-out position detecting mechanism (drawing-out position detecting means) 13 Mark (drawing-out position detecting means) 14 Mark detector (drawing-out position detecting means) 15 Control section (controlling means / blast control means) 16 Alarm mechanism (warning means) ) 17 buzzer (alarm means) 18 indicator lamp (alarm means) 21 encoder (drawing position detecting means) 22 whole dance (driving source) 71 section 72 section 73 ferromagnetic material 74 setting spring 11a driving roller (cord drawing means) 11b Driven roller (cord winding means) 91 Motor gear (cord winding means) 92 Reel gear (cord winding) Means) 93 roller gear (code extraction means) 94 switching motor (rotational force switching mechanism) 95 switching arm (rotational force switching mechanism) F tension E voltage H field P1 safe point P2 prediction point P3 limit point

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kikuo Komiyama 2-14-40 Ofuna, Kamakura City Mitsubishi Electric Corporation Living Systems Development Laboratory (72) Inventor Shiro Tanaka 2-14-40 Ofuna, Kamakura Mitsubishi Electric Stock Company Life Systems Development Laboratory (72) Inventor Yuichi Fukase 2-14-40 Ofuna, Kamakura City Mitsubishi Electric Corporation Life Systems Development Laboratory (72) Inventor Takahiro Hayakawa Nakatsukawa City Tegano 3-40 Mitsubishi Electric Engineering Co., Ltd.Nagoya Office Nakatsugawa Branch

Claims (15)

[Claims] 1. A cord winding means for winding a power cord by a rotational force of a drive source, a pull-out position detecting means for detecting a pull-out position of a power cord wound around the cord winding means, and a pull-out position detecting means. Alarm means for generating an alarm in accordance with the pull-out position of the power cord detected in 1., and cord pull-out stopping means for stopping pulling out the power cord in accordance with the pull-out position of the power cord detected by the pull-out position detecting means. A power cord winding device characterized by the above. 2. A pull-out position detecting means detects a pull-out position of a power cord wound around a cord winding means by a drive source, and an alarm means generates an alarm according to the pull-out position of the power cord to stop pulling the cord. A method to prevent damage to the power cord by stopping the pulling out of the power cord with a means to prevent damage to the winding start part of the power cord. 3. A tension detector for detecting the tension of the power cord, and automatically the power cord via the torque transmission mechanism when the tension detected by the tension detector by the rotational force of the driving source is below a reference value. A cord winding-up unit, a cord pulling-out unit that automatically pulls out a power cord through a torque transmission mechanism when the tension detected by the tension detector by the rotational force of the drive source is equal to or higher than a reference value, and the cord. The pull-out position detecting means for detecting the pull-out position of the power cord pulled out by the pull-out means, the alarm means for issuing an alarm according to the pull-out position of the power cord detected by the pull-out position detecting means, and the pull-out position detecting means. An electric device comprising: a cord pull-out stopping unit that stops pulling out the power cord according to the detected pull-out position of the power cord. 4. An electric blower, a tension detector for detecting the tension of a power cord, and a power cord is automatically fed via a gear mechanism when the tension detected by the tension detector by the rotational force of the motor is below a reference value. Cord reel that is automatically wound, a drive roller that automatically pulls out a power cord through a gear mechanism when the tension detected by the tension detector by the rotational force of the motor is equal to or greater than a reference value, and the cord is used by the drive roller. A pull-out position detecting mechanism for detecting the vicinity of the pull-out limit point of the power cord pulled out from the reel, an alarm means for issuing an alarm according to the pull-out position of the power cord detected by the pull-out position detecting mechanism, and the pull-out position detecting mechanism. An electric vacuum cleaner comprising: a cord withdrawing stop means for stopping withdrawal of the power cord in accordance with the position of pulling out the power cord detected in. 5. The electric vacuum cleaner according to claim 4, wherein an alarm sound and / or an alarm light is generated by the alarm means. 6. The electric vacuum cleaner according to claim 4, wherein the alarm of the alarm means is changed continuously or intermittently according to the length of pulling out the power cord. 7. The vacuum cleaner according to claim 4, wherein the alarm of the alarm means is increased continuously or intermittently in accordance with the length of the power cord pulled out. 8. A rotational force switching mechanism for switching the rotational force of the motor between a cord reel and a drive roller when the tension detected by the tension detector changes above and below a reference value. The electric vacuum cleaner described in 4. 9. The electric vacuum cleaner according to claim 4, further comprising cord winding means for automatically winding the power cord to a safety point before it exceeds a limit point. 10. The electricity according to claim 4, further comprising: a mark formed on a power cord as the pull-out position detecting means, and a mark detector for detecting the mark. Vacuum cleaner. 11. The electric vacuum cleaner according to claim 4, further comprising a cord length detector as the pull-out position detecting means, which detects a pull-out length of a power cord. 12. An electric blower, a tension detector for detecting the tension of a power cord, and a power cord is automatically driven through a gear mechanism when the tension detected by the tension detector due to the rotational force of the motor is below a reference value. Cord reel that is automatically wound, a drive roller that automatically pulls out a power cord through a gear mechanism when the tension detected by the tension detector by the rotational force of the motor is equal to or greater than a reference value, and the cord is used by the drive roller. A pull-out position detection mechanism that detects the vicinity of the pull-out limit point of the power cord pulled out from the reel, and a blower control means that controls the blower of the electric blower according to the pull-out position of the power cord detected by the pull-out position detection mechanism. An electric vacuum cleaner characterized by being provided. 13. The electric vacuum cleaner according to claim 12, wherein a sound generated by the electric blower for blowing air also serves as an alarm sound. 14. An electric blower, a cord reel in which a power cord is wound with a full force of winding, a pull-out position detection mechanism for detecting the vicinity of a pull-out limit point of the power cord wound in the cord reel, and the pull-out device. An alarm means for issuing an alarm according to the position where the power cord is detected by the position detection mechanism,
An electric vacuum cleaner comprising: a cord pull-out stopping unit that stops pulling out the power cord according to a pull-out position of the power cord detected by the pull-out position detecting mechanism. 15. An electric blower provided inside the main body, a cord reel in which a power cord is wound by a winding force of a motor or a full dance, and a vicinity of a pull-out limit point of the power cord wound in the cord reel are detected. A pull-out position detection mechanism, an alarm means for issuing an alarm according to the pull-out position of the power cord detected by the pull-out position detection mechanism, and a pull-out of the power cord according to the pull-out position of the power cord detected by the pull-out position detection mechanism An electric vacuum cleaner, comprising: a cord withdrawing stopping means for stopping the cord, the cord reel, and a motor arranged in a rear space of the main body.