Sanyo Electric Co., Ltd.

Kunioki Honda

Harumi Takeuchi

Yorihisa Funada

Takashi Fukui

Minoru Yoshida

Tamotsu Kawamura

Satoshi Nakamura

Takaaki Yonezawa

Tetsuo Harada

Kenji Nakagawa

Makoto Takeuchi

Hiroyuki Hoshino

Yuji Ozeki

Mitsunori Shinmura

An engaging groove partis provided at the outer circumferential edge of a rotorof an outer-rotor type motor directly connected to the main shaftof a drum, and on the other hand, a drum locking deviceis provided directly below the shaft. The drum locking deviceis constructed so that a lock pin moves up and down in response to rotation of a torque motor, and when the lock pin advances and fits into the groove of the engaging groove pan, the position of the drumis fixed. Thereby, the stopping position of the drum can be fixed with a simple construction.

Drum washing machine

In a drum type washing machine, a drumis mounted to rotate about a horizontal axis extending in the lateral direction in a tubA tub openingwith a tub dooris formed in the tubunder the throw-in openingformed in the front part of the top of the housing. A drum openingwith a drum door composed of a double door opening frontward and backward is formed in the peripheral wall of the drumThe drumis stopped so that the drum openingcoincides with the tub opening. The drum door, forced into its opening direction, is held in a closed position by an engagement of a clawand an engagement holeWhen a user rotates a operation leverfor latching or unlatching the tub doorthe drum door open/close mechanismfunctions to make two rodsandproject or withdraw, whereby the drum dooris brought into an engaged or unengaged state. By this mechanism, the drum dooropens or closes with the opening or closing operation of the tub door. Thus, the operation of the doors is simplified, and the laundry loaded into or unloaded out of the drumby fewer working steps.

Drum type washing machine

By rotating a drum at a low speed, the laundry is redistributed so that the eccentric load due to the laundry comes at a position opposing a balancing chamber. Then, while the drum is rotated at a middle speed, a balancing-water supply valve is opened to supply water from a balancing-water nozzle into a water-guiding chamber provided on the back of the drum. The water supplied flows into the balancing chamber, thus increasing the weight of the balancing chamber. The water supply is continued until the magnitude of the eccentric load of the drum holding the laundry and the water becomes smaller than a predetermined value. After an adequate amount of water is supplied, the total eccentric load is so small that the abnormal vibration does not occur even when the drum is rotated at a high speed for extraction.

Spin extractor

A washing machine comprises an outer drum and an inner tub having water-expelling holes on its side wall. On the bottom of the inner tub, an agitator rotated intermittently by a motor is supported by means of bearings. An air trap is provided in communication with the gap between the outer and inner tubs. When the washing operation is started, the agitator is rotated and due to the pumping action of the agitator, the water level between the inner and outer tubs falls temporarily, which is detected by the pressure sensor connected to the air trap. The motor is deenergized according to the output from the pressure sensor and the agitator is stopped. Then the water level starts rising temporarily again thus the pressure sensor output is increased, which in turn energizes the motor and rotates the agitator. When such ON and OFF of the motor are repeated for more than the predetermined number of times, the washing operation will be completed. During the water-expelling process, the time required to obtain substantially constant changing rate of the pressure sensor output from the start of the water-expelling is measured. The energizing time and the braking timing of the motor for rotating the inner tub are controlled by the multiple of the measured time.

Washing machine

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Moriguchi, Japan

Kunioki Honda