JPS6155997B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements in drum type washing machines.

In conventional drum-type washing machines, a plurality of holes are formed in the peripheral wall of the drum, and a detergent liquid flow is circulated between the drum and the receiving tank through the holes. However, according to this mechanism, the diameter of the holes is small enough to prevent the laundry from spilling out of the drum, so not only does the detergent liquid become separated when the drum rotates, but the laundry also blocks the holes and becomes stuck inside the drum. The exchange of the detergent liquid in the receiver tank is blocked, making it impossible to use the detergent efficiently, resulting in a low cleaning effect.

SUMMARY OF THE INVENTION An object of the present invention is to provide a drum-type washing machine that eliminates the above-mentioned drawbacks and can actively feed detergent liquid into the drum to ensure smooth circulation of the liquid, thereby increasing the cleaning effect and saving detergent. do.

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a substantially cylindrical drum consisting of a peripheral wall 2a and left and right side walls 2b, 2c, and a plurality of water passage holes 3 are formed in each of the peripheral wall and the side walls.
Reference numeral 4 denotes a plurality of buffs having a generally mountain-shaped cross section and protruding inwardly from the peripheral wall 2a of the drum 1 at equal intervals. A plurality of water injection holes 5 are provided in the chevron-shaped side wall of the baffle 4. A rectangular notch 6 is formed in the drum peripheral wall 2a located at the chevron-shaped bottom of the buffle 4. Reference numeral 7 denotes a substantially hinge-shaped fixture with one end bent into a curled shape, and is attached to the outer circumferential surface of the notch 6 in the direction opposite to the direction of rotation of the drum. Reference numeral 8 denotes a plate-shaped blade made of metal such as stainless steel, which is formed to have approximately the same width as the width of the notch 6 in the width direction of the drum, and one end of which can fit into the curled bent portion of the fixture 7. It has a curled portion formed therein, and both curled portions are rotatably connected via a pin 9. Reference numeral 10 denotes a tight spring whose winding portion is wound around the pin 9, and constantly urges the blade 8 toward the drum peripheral wall surface. The other end of the blade 8 forms a loosely bent piece 12. Reference numeral 11 denotes a U-shaped stopper that covers the blade 8 and bridges it in the width direction of the drum. The end edge of this stopper 11 on the drum rotation direction side corresponding to the bent piece 12 of the blade 8 is set to form a notch 13 so that the blade 8 can be opened at a certain angle. 14 is a drum-shaped receiving tank in which the drum 1 is built, and is formed concentrically with the drum 1. The receiving tank 14 has one side wall fixed to a housing 19 and supported by a spring 17 to a washing machine shell 18 . And on the other end is the laundry input port 2.
8 is opened, and a lid 29 is attached to this opening. A water supply port 15 is opened in the upper part of the receiving tank 14, and a drain port 16 is opened in the lower part. A shaft 21 is installed inside the housing 19 via a bearing 20.
is rotatably supported. The drum 1 is fixed to one end of the shaft 21 via a washer 22, and a drive pulley 23 is attached to the other end. This drive pulley 23 is driven by a pulley 26 directly connected to a motor 25 via a V-belt 27.
24 is a cover for preventing laundry from getting caught on the washer 22.

When the laundry 31 is put into the drum 1 and the drum rotates in the direction of arrow A as shown in FIG. 6, the blades 8 attached to the outer wall of the drum also rotate together. There is an air layer in the upper part of the receiving tank 14, and the blades 8 rotating in this air layer are urged against the peripheral wall surface of the drum by a stiff spring 10. However, when the blade 8 is submerged in water, its back surface opens until it hits the notch 13 of the stopper 11 due to water resistance. When the drum 1 further rotates and the blades 8 return to the air layer, the blades 8 are lifted up while retaining water inside their openings, and this water is expelled in the air by the biasing force of the stiff spring 10, and the water is expelled from the notch. Water is injected into the drum 1 through the water injection hole 5, and is dropped onto the laundry 31. The bent piece 12 provided at the other end of the blade 8 increases the resistance when the blade 8 opens underwater, making it easier to open.

In the above embodiment, the drum 1 rotates in one direction, but in the case of a drum reversal type, the blades 8 may be provided on both sides of the notch 6 with the other ends facing each other. good.

As described above, in the present invention, as the drum rotates, the detergent liquid in the receiving tank is continuously actively injected into the drum, and the dirty detergent liquid in the drum is refluxed to the outside of the drum. Circulation efficiency is increased, the cleaning effect can be greatly improved, and the amount of detergent used can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an embodiment of the present invention, Fig. 2 is an enlarged perspective view of the main parts, Figs. 3, 4, and 5 are enlarged perspective views of parts, respectively, and Fig. 6 is a blade FIG. 1...Drum, 3...Water hole, 4...Bassful, 5
...Water supply hole, 6...Notch, 8...Blade, 10...Spring,
14...Receiver tank.

Claims (1)

[Scope of Claims] 1. A drum rotatably supported on a horizontal shaft in a receiving tank having a water supply port and a drainage port, and having a water passage hole in its peripheral wall, and an inner peripheral wall of the drum having a substantially mountain-shaped cross section. A plurality of buttfuls are provided, a plurality of water injection holes are provided on both side walls of the buttfuls, and a notch is formed in the drum circumferential wall located at the chevron-shaped bottom of the buttful, and a cutout is formed on the outer periphery near the notch in a direction opposite to the rotational direction of the drum. A blade is rotatably supported at one end on the outer peripheral surface of the drum, and the other end of the blade is urged by a spring to rotate toward the outer peripheral surface of the drum. A drum-type washing machine characterized by being set so that the notch side can be opened at a certain angle. 2 At the outer periphery near the notch formed in the drum peripheral wall,
2. A drum-type washing machine according to claim 1, wherein two blades are provided facing each other on both sides of the cutout portion, one end of which is rotatably supported on the outer circumferential surface opposite to the rotational direction of the drum.