JPS6360668B2 - - 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 rotary shaft 12b; 9 is an inlet provided in the partition wall 2 to communicate the two chambers; 6b and 7b are the rotary shaft of the rotary brush 3b and the rotary 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 tool described above has a configuration in which the fan 4b is rotated by suction air and this rotational force is transmitted to the rotating brush 3b via the belt 8. This has the disadvantage of requiring a large number of components. 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 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.In particular, the fixed brush installed around the rotating brush The object of the present invention is to improve the cleaning work efficiency by configuring the cleaning device so that it can be moved upward or downward according to the surface to be cleaned.

<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 a specific example of dust suction, and 1a is a main body case having a substantially conical shape with one end flared, and has a female threaded portion 13a on the inner periphery of the flared end, and a slope 14 on the top side. are doing. Reference numeral 15 denotes a connecting portion projecting outwardly from the slope 14 in a cylindrical shape, and a hook 17 projecting in the circumferential direction is provided at the tip of the connecting portion. 16 is a pipe rotatably fitted to the connecting portion 15; 18 is a substantially cylindrical intake guide as a cylindrical portion forming the suction port 11a of the main body 1;
It has a threaded portion 13b on the outer periphery of the upper end, and is connected to the lower end of the main case 1a by fitting the male threaded portion 13b 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, thereby efficiently driving the fan 4a to rotate. As a result, the rotating brush 3a directly connected to the fan 4a is rotated.

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.

Further, according to this configuration, 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 used as an intake guide. It can now be moved freely without coming into contact with 18, making it easier to clean the shoji shoji, step portions, etc.

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, 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, since the guide plate 29 is provided on the rotating brush 3a, even if turbulent flow of incoming air occurs at the rotating brush 3a portion, the incoming air will flow through the guide wall 2.
Since the flow is rectified by 9, the fan 4a can be rotated efficiently, improving the fan efficiency and having the advantage of making the fan 4a smaller and lighter.

In addition, since the main body case 1a and the intake guide 18 are freely connected to each other by screw fitting between the female threaded portion 13a and the male threaded portion 13b provided on both sides, dust accumulated in the air flow path inside the main body 1 is removed. etc. 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 even with a configuration in which stoppers are provided at both ends.

<Effects of the Invention> As described 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 of parts can be reduced, rotational energy generated by airflow can be effectively used, and design flexibility can be increased. In particular, since the fixed brush arranged around the rotating brush is configured to be movable up and down according to the cleaning surface, there is an advantage that cleaning work efficiency can be improved.

[Brief explanation of drawings]

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, 24...Guide pin, 25...Space, 26...Groove, 28...Fixed brush, 29...Guide wall.

Claims (1)

[Claims] 1. A dust suction tool main body having a cylindrical portion forming a suction port at its lower end, a fan having a rotating shaft in an axial direction perpendicular to the suction port forming surface and rotated by suction air; a rotating brush directly connected to the fan and located at a position facing the suction port, and a fixed brush disposed so as to surround the cylindrical portion with a space therebetween; A dust suction tool for a vacuum cleaner, characterized in that it is attached to the dust suction tool body so that it can slide freely along an axial direction perpendicular to the suction port forming surface and can be locked at the end of the slide.