JPH0223256Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pulsator for a whirlpool type washing machine.

A whirlpool type washing machine washes the laundry by stirring the washing water in a spiral, and its cleaning action consists of the friction between the laundry and the pulsator, the friction between the laundry and the wall of the washing tank, and the washing process. It is said that this is due to the kneading effect caused by the bending and stretching of the object itself. Therefore, in order to wash laundry evenly and without damaging the fabric, it is preferable to generate a water flow that repeats the above-mentioned washing action evenly, but many conventional pulsators Since the pulsator has a structure in which a plurality of bone-like wing parts are arranged radially on the upper surface of a flat disc body, the laundry tends to be rotated mainly around the pulsator in a plane without changing the laundry vertically. . Another common problem is that the laundry gets tangled with each other and ends up looking like dumplings. On the other hand, the conventional pulsator described above structurally has a large stirring force for the cleaning water, in other words, it has a large resistance to the cleaning water, so it is necessary to use an electric motor with a large starting torque, which is not desirable from a cost standpoint. .

This idea was created in view of the above circumstances, and its purpose was to generate a soft water flow and a wide-angle vortex, thereby efficiently changing the laundry from top to bottom without causing entanglement or damage to the fabric. An object of the present invention is to provide a pulsator that can be easily washed.

Hereinafter, this invention will be described in detail with reference to an embodiment shown in the accompanying drawings.

This pulsator 1 consists of a rotating body 2 made of synthetic resin and having an inverted bowl shape. That is, this rotating body 2 is
It is formed almost as a hemisphere with the central part protruding upward. The outer surface of the pulsator 1 is provided with a plurality of independent concave spherical sections 3a to 3d, four in this embodiment. In this case, the concave spherical parts 3a to 3d are preferably arranged at equal intervals as shown in FIG. It is good if it is oriented. More specifically, it is preferable that the virtual plane L defined by the opening surface of the concave spherical portion 3 intersects the rotational axis H of the pulsator 1 at an angle of approximately 45 degrees. (See Figure 3).

As mentioned above, four independent concave spherical parts 3a
3d, four wing parts 4a to 4d are formed between them, but in this invention, for example, two wing parts 4b and 4d are located at their respective upper ends. The part is the other wing part 4
It is formed to be one step lower than a and 4c (see Fig. 2). Note that, unlike this embodiment, only one of the wing portions 4b and 4d may be formed one step lower as described above. Also,
The concave spherical portions 3a to 3d are formed in this pulsator 1.
It is arranged so that a spherical hem 5 is left behind. That is, the skirt portion 5 remains in the basic shape of the rotating body 2. Therefore, the pulsator 1 will not be locked due to laundry being caught on the hem portion 5.

On the other hand, a cylindrical boss 6 connected to a pulsator drive shaft (not shown) is integrally molded on the central rear side of the pulsator 1. In this case, boss 6
has a relatively long length since the pulsator 1 is formed into an almost hemispherical shape as described above, but it is connected to the pulsator drive shaft using a male screw of a length commensurate with this length. If this is attempted, for example, strength problems will arise. Therefore, in this embodiment, a screw insertion part 7 for connection to the pulsator drive shaft is provided in a portion near the lower end of the boss 6, so that a relatively short male screw can be used, and a Even if the screw insertion part 7 is provided at the location, for example, when unscrewing the connecting male screw,
A rib 8 that serves as a guide for the unscrewing position is connected to the upper edge of the screw insertion portion 7. Therefore, when the operator removes this pulsator from the pulsator drive shaft (not shown) by turning the male screw (not shown) inserted through the screw insertion portion 7, the head of the male screw should touch the upper edge of the rib 8. When they match, it can be determined that the screw engagement with the pulsator drive shaft has been released.

As illustrated in FIG. 4, the pulsator 1 is installed on the bottom wall 10 of the washing tub 9, and is connected to the pulsator drive shaft (not shown) via the boss 6 as described above. However, according to this invention, the pulsator 1 consists of an inverted bowl-shaped rotating body 2, and the outer surface thereof preferably has a plurality of independent concave spherical parts 3, the opening surfaces of which are arranged outwardly at an angle of approximately 45 degrees. As shown in Figure 4, the laundry is oriented so that a soft vortex with a wider angle is generated, and the laundry follows this vortex with little entanglement, and the laundry moves vertically into the washing tub. 9 is passed evenly. Therefore, laundry can be thoroughly washed without causing damage to the fabric or uneven shedding. Furthermore, since the degree of contact between the laundry and the pulsator is reduced, the electric motor only needs to have a small starting torque, and costs can be reduced. On the other hand, the wing section 4 of this pulsator 1
Because at least one of the steps is formed one step lower than the others, for example, even if laundry is located at the upper center of the pulsator 1, the laundry will accumulate in the pulsator 1 due to resistance at that step. There is no risk of it happening.

In addition, in the above embodiment, the concave spherical portion 3 is
Although it has an elliptical shape in the plan view of the figure, it is not necessarily in this shape and may be, for example, in a polygonal shape. Further, the upper opening surface of the boss 6 is adapted to be removably covered with a lid (not shown).

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the pulsator according to this invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, Fig. 3 is a sectional view taken along the line B-B in Fig. 1, and Fig. 4 is a washing machine. It is a drawing schematically showing the vortex generated by the same pulsator in the tank. In the figure, 1 is a pulsator, 2 is a rotating body, 3 is a concave spherical surface part, 4 is a wing part, 5 is a hem part, 6 is a boss, 7 is a screw insertion part, and 8 is a rib.

Claims (1)

[Scope of claim for utility model registration] The product is rotatably attached to the bottom wall of the washing tub.
A pulsator for a washing machine that is rotationally driven by an electric motor has an inverted bowl-shaped rotating body consisting of a substantially hemispherical body with a central portion protruding upward, and the rotating body has a plurality of independent concave spherical parts arranged in a predetermined manner. The laundry is characterized in that the upper end portion of at least one of the wing portions formed between the concave spherical surface portions is spaced apart from each other and is formed lower than the other wing portions. Machine pulsator.