JPH0223255Y2 - - 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. Oriented. To put this more specifically, the virtual plane L defined by the opening surface of the concave spherical portion 3 is oriented so as to intersect 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
By providing ~3d, there is 4 between them.
Although two wing parts 4a to 4d are formed,
In this embodiment, two of the wing parts 4
b, 4d have their respective upper end portions connected to other wing portions 4a,
It is formed to be one step lower than 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. Due to the resistance of this stepped portion, even if the laundry is located at the center of the pulsator 1, there is no risk that the laundry will accumulate on the pulsator 1. Further, the concave spherical portions 3a to 3d are arranged so that a spherical hem portion 5 remains on the pulsator 1. 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 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
The pulsator 1 has a relatively long length since it 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 you try to do so, problems arise, for example, in terms of strength. 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 portion 7 is provided at a certain location, a rib 8 is connected to the upper edge of the screw insertion portion 7, which serves as a guide for the unscrewing position when, for example, the male connection screw is unscrewed. Therefore, when an operator removes the pulsator 1 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 be attached to the upper edge of the rib 8. It can be determined that the screw engagement with the pulsator drive shaft has been released when the pulsator drive shaft matches the pulsator drive shaft.

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 has a plurality of independent concave spherical parts 3, the opening faces of which face outward at an angle of approximately 45 degrees. As shown in Fig. 4, a soft swirl with a wider angle is generated, and the laundry moves along this swirl with almost no entanglement, and the laundry moves vertically in the washing tub 9. is rotated 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 1 is reduced, the electric motor needs to have a small starting torque, and costs can be reduced.

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 drawings]

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] It 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. A pulsator for a washing machine, characterized in that the opening surfaces of the concave spherical portions are spaced apart and are oriented at an angle of approximately 45 degrees toward the outside of the rotating body.