Drum type washing machine

• US 20030061841A1
• Filed: 09/20/2002
• Published: 04/03/2003
• Est. Priority Date: 09/28/2001
• Status: Active Grant

• Current Assignee: Haier Group Corporation (Haier Group Company), Qingdao Haier Washing Machine Co., Ltd. (Haier Group Company)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Nakamura, Satoshi, Takeuchi, Makoto, Fukui, Takashi, Nakagawa, Kenji, Honda, Kunioki, Kawamura, Tamotsu, Takeuchi, Harumi, Funada, Yorihisa
• Granted Patent: US 7,073,356 B2
• Time in Patent Office: Days
• US Class Current: 68/12.26
• CPC Class Codes: D06F 37/10 Doors; Securing means therefor
• CPC Class Codes: D06F 37/28 Doors; Security means therefor
• CPC Class Codes: D06F 37/42 Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door

Abstract

In a drum type washing machine, a drum 23 is mounted to rotate about a horizontal axis extending in the lateral direction in a tub 20. A tub opening 20b with a tub door 20a is formed in the tub 20 under the throw-in opening 3 formed in the front part of the top of the housing. A drum opening 23a with a drum door composed of a double door opening frontward and backward is formed in the peripheral wall of the drum 23. The drum 23 is stopped so that the drum opening 23b coincides with the tub opening 20b. The drum door 23a, forced into its opening direction, is held in a closed position by an engagement of a claw 43 and an engagement hole 53. When a user rotates a operation lever 63b for latching or unlatching the tub door 20, the drum door open/close mechanism 65 functions to make two rods 65a and 65b project or withdraw, whereby the drum door 23a is brought into an engaged or unengaged state. By this mechanism, the drum door 23a opens or closes with the opening or closing operation of the tub door 20a. Thus, the operation of the doors is simplified, and the laundry loaded into or unloaded out of the drum 23 by fewer working steps.

Claims

1. A drum type washing machine in which a drum with a substantially cylindrical peripheral wall is mounted to rotate about a horizontal or inclined axis in a tub enclosed in a housing, comprising:

a) a throw-in opening formed in a top of the housing, which can be closed by a lid;

b) a tub opening formed in a peripheral wall of the tub placed right under the throw-in opening, which can be closed by a tub door;

c) a drum opening formed in the peripheral wall of the drum, which can be closed by a drum door;

d) a drum position determiner for stopping the drum in such a position that the drum opening substantially coincides with the tub opening; and

e) a door-linking mechanism for making the drum door open together with an opening motion of the tub door when the drum is stopped with both the tub door and the drum door closed.

2. The drum type washing machine according to claim 1, wherein the door-linking mechanism is constructed so that it makes the drum door close together with a closing motion of the tub door when both the tub door and the drum door are opened.

3. The drum type washing machine according to claim 1, wherein the drum door is forced into its opening direction by a force whose magnitude is determined so that the force makes the drum door barely follow the opening motion of the tub door.

4. The drum type washing machine according to claim 1, wherein:

the drum is mounted to rotate about an axis extending in a lateral direction;

the housing has a slope declining from the top to the front;

the throw-in opening is formed to extend over the slope;

the lid is a foldable structure composed of at least a front part and a rear part hinged to each other at a bent part of the top of the housing, where the bent part corresponds to a rear end of the slope; and

the lid stands behind the throw-in opening in a folded position when it is opened.

5. The drum type washing machine according to claim 1, wherein:

the drum is mounted to rotate about an axis extending in a lateral direction;

the housing has a slope declining from the top to the front;

the throw-in opening is formed to extend over the slope; and

an control panel with control keys are placed on the slope.

6. The drum type washing machine according to claim 5, wherein:

the lid for closing the throw-in opening, the control panel with the control keys, and a detergent container which is drawable frontward are arranged so that the lid is located at the center and the control panel and the detergent container are located on both sides of the lid, respectively, or on one side of the lid.

7. The drum type washing machine according to claim 1, further comprising:

a tub-door-latching mechanism for holding the tub door in a closed position;

a forcing mechanism for forcing the drum door in an opening direction of the drum door;

a drum-door-latching mechanism for holding the drum door in a closed position of the drum door;

an operation mechanism, provided in the tub door, to be operated by a user; and

an unlatching mechanism for actuating the tub-door-latching mechanism and the drum-door-latching mechanism in response to an operation of the operation mechanism so that the drum door is released from its latched state and the tub door is released from its latched state at the same time or with a slight delay.

8. The drum type washing machine according to claim 7, wherein the tub-door-latching mechanism and the drum-door-latching mechanism are constructed so that the tub door and the drum door independently move from opened positions to the closed and latched positions.

9. The drum type washing machine according to claim 7, wherein the unlatching mechanism includes:

a first moving part which projects into or withdraws from an inside of the drum together with the operation of the operation mechanism, and contacts the drum-door-latching mechanism to release a latch when it fully projects; and

a second moving part which actuates the drum-door-latching mechanism together with the operation of the operation mechanism to release a latch.

10. The drum type washing machine according to claim 1, further comprising a stopper which contacts an edge of the drum door when the drum attempts to rotate with the drum door opened.

11. A drum type washing machine wherein a drum with a substantially cylindrical peripheral wall is mounted to rotate about an axis extending in a lateral direction in a tub enclosed in a housing, comprising:

a) a throw-in opening formed in a top of the housing, which can be closed by a lid;

b) a tub opening formed in a peripheral wall of the tub placed right under the throw-in opening, which can be closed by a tub door;

c) a drum opening formed in the peripheral wall of the drum;

d) a drum door for closing the drum opening, composed of a double door having two door elements opening frontward and backward, respectively, each door element being forced into its opening direction, and an engaging mechanism for holding the drum door in a closed position;

e) a drum position determiner for stopping the drum in such a position that the drum opening substantially coincides with the tub opening; and

f) a drum-door-linking mechanism having at least one moving part movable back and forth between the tub and the drum, where the moving part makes a motion when an operation to open the tub door is performed, and the motion of the moving part releases the engaging mechanism from engagement so that the drum door is opened.

12. The drum type washing machine according to claim 11, wherein drum-door-linking mechanism is constructed so that a closing operation of the tub door makes the moving part move to bring the engaging mechanism into engagement so that the drum door is closed.

13. A drum type washing machine wherein a drum with a substantially cylindrical peripheral wall is mounted to rotate about an axis extending in the lateral direction in a tub enclosed in a housing, comprising:

a) a throw-in opening formed in a front-side part of a top of the housing, which can be closed by a lid;

b) a tub opening formed in a peripheral wall of the tub placed right under the throw-in opening, which can be closed by a tub door;

c) a drum opening formed in the peripheral wall of the drum;

d) a drum door for closing the drum opening, composed of a double door having two door elements opening frontward and backward, respectively, where a length of a front-side door element in a front-back direction is smaller than that of a rear-side door element; and

e) a drum position determiner for stopping the drum in such a position that the drum opening substantially coincides with the tub opening.

14. A drum type washing machine wherein a drum with a substantially cylindrical peripheral wall is mounted to rotate about a horizontal or inclined axis in a tub enclosed in a housing, comprising:

a) a throw-in opening formed in a top of the housing, which can be closed by a lid;

b) a tub opening formed in a peripheral wall of the tub right under the throw-in opening, which can be closed by a tub door;

c) a drum opening formed in the peripheral wall of the drum;

d) a drum door for closing the drum opening, composed of a double door having two door elements, where the two door elements are engaged with each other at overlapping parts when the drum door is closed;

e) a linking mechanism for linking the two door elements of the drum door to concurrently move the two door elements; and

f) a drum position determiner for stopping the drum in such a position that the drum opening substantially coincides with the tub opening.

15. The drum type washing machine according to claim 14, wherein the linking mechanism is provided inside the drum.