JPS6360669B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Technical Field of the Invention> The present invention relates to a dust suction device for a vacuum cleaner, and more particularly to a dust suction device having a structure in which a fan is rotated by suction air and a brush is rotated in conjunction with the fan.

<Conventional technology> A conventional example of this type of dust suction tool is shown in FIG.

That is, in the figure, 1b is a main body case, the interior of which is divided into two chambers by a partition wall 2. 3b is a rotating brush disposed in one chamber; 11b is a suction port formed on the bottom surface of the main case 1b so as to communicate with the chamber in which the rotating brush 3b is disposed; 4b is a fan disposed in the other chamber. Then, the rotating brush 3
It has a rotation axis 12b parallel to the rotation axis of b.
5b is a bearing that supports the rotating shaft 12b; 9 is an inlet provided in the partition wall 2 to communicate the two chambers; 6b and 7b are the rotating shaft of the rotating brush 3b and the rotating shaft 12b of the fan 4b, respectively. A belt 8 is wound around a gear provided at one end of the belt.

10 is a pipe connecting the dust suction tool to the vacuum cleaner side,
It is coupled to the main body case 1b so as to communicate with the chamber in which the fan 4b is arranged.

Such a dust suction tool is used by being connected to a vacuum cleaner, and when the vacuum cleaner is driven, the suction port 11 is first opened.
Suction air flows from b into the chamber in which the rotating brush 3b of the main body case 1b is disposed. This suction air is throttled by the inlet 9 of the partition wall 2 and collides with the fan 4b with an increased flow velocity. As a result, the fan 4b rotates, rotation is transmitted from the gear 7b to the gear 6b via the belt 8, and the rotating brush 3b rotates.

However, the conventional dust suction tools as mentioned above,
Since the fan 4b is rotated by the sucked air and the rotational force is transmitted to the rotating brush 3b via the belt 8, a rotation transmission mechanism such as the belt 8 is required, and the number of components is increased. It was hot. In addition, mechanical loss due to the use of the belt 8, such as friction loss between the belt 8 and the gears 7b and 6b, occurs, and the rotational energy generated by the air flow cannot be used effectively, and there is also the disadvantage that noise is generated. It was hot. Furthermore, there were also limitations regarding the placement of each component, and there was also the drawback that there was little margin in terms of design.

<Summary of the Invention> Therefore, in view of the above-mentioned conventional circumstances, the present invention provides a configuration in which a fan and a rotating brush are arranged in parallel with each other with respect to the suction air flow, and the fan and the rotating brush are directly connected. This provides a dust suction tool that reduces the number of components, makes effective use of the rotational energy generated by airflow, and has a large design margin. The purpose of this configuration is to improve fan efficiency.

<Embodiment of the Invention> An embodiment of the invention will be described below with reference to FIGS. 2 and 3.

In Fig. 2, 1 is the main body of the dust suction device, and 1a is a main body case having a substantially conical shape with one end widening at the end, and has a female threaded portion 13a on the inner periphery of the end at the end, and a slope 14 at the top side. are doing. Reference numeral 15 designates a connecting portion that projects outwardly from the slope 14 in a cylindrical shape, and a hook 17 that projects in the circumferential direction is provided at the tip of the connecting portion. 16 is a pipe that is rotatably fitted into the connecting portion 15; 18 is a substantially cylindrical intake guide with a suction port 11a opened at the lower end of the main body; Male thread part 13b
is connected to the lower end of the main case 1a by fitting into the female threaded portion 13a.

3a is a rotating brush having a rotating shaft in the direction of the center axis of the intake guide 18; 12a is a rotating shaft to which the rotating brush 3a is fixedly attached with a nut 32;
It is supported by a. 4a is this rotating shaft 12
This is an axial flow fan fixedly attached to the upper end of the main body case 1a by press fitting, and is located inside the main body case 1a.

The rotating brush 3a consists of a brush part 31 and a support frame 33 for the brush part 31.
A guide wall 29 for suction air extending in a cylindrical shape having the same diameter as the upper end circumferential portion is integrally molded. Further, a guide wall 19 is integrally formed at the upper end of the intake guide 18 and extends in a cylindrical shape so as to surround the lower end of the fan 4a with a gap therebetween. These guide walls 29, 19 each have a function of efficiently guiding the suction air flow toward the fan 4a. 2
A protector 0 is made of a soft material and has a plurality of tongues 21 projecting downward, and is fitted onto the lower end of the intake guide 18. Reference numeral 28 denotes a fixed brush disposed around the intake guide 18 so as to form a space 25 between the support frame 34 and the outer peripheral surface of the intake guide 18.
and a brush portion 22. The fixed brush 28 is fitted and attached to the outer surface of the intake guide 18 so that it can slide freely up and down and can be locked at the end of the slide. In this case, the outer peripheral surface of the intake guide 18 is provided with a pair of grooves 26 that slope from the top to the bottom as shown in FIG. A guide pin portion 24 that is inserted into the groove 26 is formed in the contact portion 23 . Therefore, by twisting the fixed brush 28, the guide pin portion 24 can move up and down while being guided by the groove 26, and can be locked at each end of the groove 26. ing. 3 in Figure 3
0 is a sub-intake port opened in a portion of the intake guide 18 corresponding to the space 25.

The dust suction tool configured as described above is connected to a vacuum cleaner, and when the suction force of the vacuum cleaner is applied, air flows in along the inner wall of the air intake guide 18. This suction air is rectified by the guide walls 29, 19 and efficiently rotates the fan 4a, thereby rotating the rotating brush 3a directly connected to the fan 4a.

According to the dust suction tool having such a structure, the fan 4a and the rotating brush 3a are arranged in parallel rows with respect to the suction air flow, and the fan 4a and the rotating brush 3a are directly connected, so that the conventional belt etc. is omitted. It is possible to reduce the number of components. Moreover, problems of mechanical loss and noise caused by the use of belts can be solved. Furthermore, there are no restrictions on the arrangement of components, and design latitude can be improved.

Furthermore, according to this configuration, since the guide wall 29 is provided on the rotating brush 3a, even if turbulent flow of incoming air occurs at the rotating brush 3a portion,
Since the incoming air is rectified by the guide wall 29, it is possible to rotate the ring 4a efficiently.
There is an advantage that the fan efficiency can be improved and the fan 4a can be made smaller and lighter.

According to this embodiment, a protector 20 made of a soft material is attached to the tip of the intake guide 18, so that it is safe and will not be damaged even if it collides with the surface to be cleaned.

Furthermore, since the fixed brush 28 is configured to be movable to the upper and lower positions, the fixed brush 28 can be made to protrude from the lower end of the main body case 1a, and as a result, the brush portion 22 can be moved without coming into contact with the intake guide 18. Now you can move it freely, making it easier to clean the edges of shoji screens and the parts of the steps.

Furthermore, the protector 20 is provided with a tongue portion 21 so that the lower end side has an uneven surface, and the suction guide 18 is provided with a sub-intake port 30, so that when the suction port 11a comes into contact with the surface to be cleaned, suction becomes impossible. This can be prevented. In addition, since the pipe 16 is attached to the slope 14 of the main body case 1 so as to be freely rotatable, this rotation causes the pipe 16 to be attached to the main body case 1.
It is convenient because the connection angle with a can be changed and it can be used in a way that suits the position of the cleaning surface.

Furthermore, the main body case 1a and the intake guide 18 are
Since the female threaded portion 13a and the male threaded portion 13b provided on both sides are screwed together, they can be freely attached and detached.
Dust and the like accumulated in the air flow path in the main body 1 can be easily removed by disassembly.

In this embodiment, the brush part 31 attached to the rotating brush 3a is not limited to the one with flocked hair,
The same effect can be expected even with soft urethane or cloth. Moreover, the up/down movement structure of the fixed brush 28 is simply provided with grooves on the intake guide 18 side in the up/down direction.
A similar effect can be obtained by providing stoppers at both ends.

<Effects of the Invention> As explained above, according to the present invention, the fan and the rotating brush are arranged in parallel rows with respect to the suction air flow, and the fan and the rotating brush are directly connected. The number can be reduced, the rotational energy generated by the airflow can be effectively utilized, and a large degree of design latitude can be achieved. In particular, the configuration in which the rotating brush is provided with a guide wall for sucking air has the effect of improving fan efficiency and making the fan smaller and lighter.

[Brief explanation of the drawing]

Fig. 1 is a plan sectional view showing an example of a conventional dust suction tool, Fig. 2 is a front sectional view showing an embodiment of the dust suction tool according to the present invention, and Fig. 3 shows the outer surface shape of the intake guide in the same embodiment. FIG. 1...Dust suction tool body, 3a...Rotating brush, 4a
...Fan, 11a...Suction port, 29...Guide wall.

Claims (1)

[Claims] 1. A dust suction tool body provided with a suction port has a rotating shaft in an axial direction perpendicular to the suction port forming surface,
A fan rotated by suction air, and a rotary brush directly connected to the fan and located at a position facing the suction port, and the rotary brush is provided with a fan rotated by the suction air in the direction of the rotation axis in the downstream direction. A dust suction tool for a vacuum cleaner, characterized in that a suction air guide wall extending in a cylindrical shape and having approximately the same diameter as a rotating brush is provided.