JPH0423508Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field of the invention This invention relates to a floor cleaning tool equipped with a rotating brush.

Technical Background and Problems This type of floor cleaning tool has a brush chamber with an opening at the bottom that houses the rotating brush in the main case that runs on the floor. The rear edge of the opening edge is a straight line parallel to the axis of the rotating brush. Therefore, the dust blown backward by the rotating brush is repelled forward by the rear wall of the brush chamber or the rear edge of the opening. Normally, a ventilation hole connected to the dust collection section is formed in the rear center of the brush chamber, but the suction flow toward the central ventilation hole is slow on both outer sides away from the center of the brush chamber. Therefore, there is a drawback that dust cannot be absorbed completely on both outer sides.

Purpose of the invention This invention was devised in view of the above points, and the purpose is to obtain a floor cleaning tool that can pick up even relatively large amounts of dust and has low wind noise. be.

Summary of the invention This invention consists of a brush chamber in which a rotating brush is installed and a horizontally elongated suction opening opened on the bottom of the main body case, a connecting pipe to the vacuum cleaner side, and a connection between these brush chambers and the connecting pipe. In the floor cleaning tool, the trailing edge of the horizontally elongated suction opening is arranged such that the width of the portion facing the suction air path of the horizontally long suction opening is larger than that of other portions. It is characterized by being slanted. Therefore, although there is a certain limit on the distance between the rotating brush and the suction air path, the width of the suction opening in the front-rear direction is set larger in the part facing the suction air path than in other parts, so it is difficult to compare. It is possible to suck up even large amounts of dust, and the speed of the suction airflow in the suction air path is high.
Since the width of the suction opening in that area is large in the longitudinal direction, the speed of the suction airflow can be lowered even if the suction air volume is the same, and the noise caused by wind noise can be reduced.

Embodiments of the invention This invention will be explained along with embodiments shown in the drawings. Reference numeral 1 denotes a vacuum cleaner, to which a suction hose 3 and an extension pipe 4 as connection pipes are successively connected to a dust collection part 2, respectively, and a main body case 6 having a rotary pipe 5 connected to the extension pipe 4 is provided. It is being This main body case 6 is constructed by assembling an upper case 8 and a lower case 9 with the rotary tube 5 and bumper 7 sandwiched therebetween. Inside the main case 6, there is a partition plate 1 which is joined to the upper case 8 and the lower case 9 by their edges.
0, 11, and 12, the brush chamber 13 is partitioned into a wide suction air passage 14 connected to the rotary tube 5, and a transmission chamber 15. A rotating brush 16 installed in the brush chamber 13 and a turbine 17 serving as a drive unit located in the suction air passage 14 are connected by a belt 18 in the transmission chamber 15 . A partition plate 19 is removably attached to the center of the partition plate 10, and the partition plate 19 has a ventilation hole 20 with a large air passage area that bypasses the side of the turbine 17, and a ventilation hole 20 that bypasses the side of the turbine 17. The ventilation holes 21 having a small air passage area are formed in communication with each other. Next, a wind speed adjusting plate 22 for opening and closing the ventilation hole 20 is provided so as to be slidable along the partition plates 10 and 19. This wind speed adjustment plate 2
The second operating section 23 is slidably guided by a guide rib 24 formed on the main body case 6, and the locking section 2 engages with a protrusion 25 formed on the operating section 23.
6 is formed on the elastic locking plate 27 that is connected to the lower case 9.
It is set in.

Next, a horizontally elongated suction opening 28 and side openings 12a located on both sides of the suction opening 28 and opening laterally are formed in the bottom surface of the brush chamber 13. Further, a leak hole 29 is formed in the bottom surface of the brush chamber 13. This leak hole 29 is located at a position adjacent to the ventilation hole 21 at the rear edge of the suction opening 28 . Further, front wheels 30 are provided on both sides of the front portion of the bottom surface of the main body case 6, and rear wheels 31 are provided on both sides of the rear portion. Further, a horizontally long brush 32 is provided on the lower surface of the main body case 6 and located at the rear of the leak hole 29.

The partition plates 10, 19 and the rear edge of the suction opening 28 are provided with dust guide surfaces 33, 34, 35 that are inclined rearward away from the rotating brush 16 from both outer sides toward the center. It is formed. Along with this, the wind speed adjustment plate 22
Since the operating portion 23 and the guide ribs 24 are curved along the partition plates 10 and 19, the front-back width of the portion of the suction opening 28 facing the suction air passage 14 is equal to that of the other portions. becomes larger than

In such a configuration, when the ventilation hole 20 is opened as shown in FIG.
0 and 21 into the suction air passage 14, and from the rotary tube 5 into the dust collecting section 2. At this time, most of the intake airflow is sucked in through the large ventilation hole 20 that bypasses the turbine 17, and the amount of wind that passes through the small ventilation hole 21 is extremely small and the wind speed is low.
is not driven by wind speed. This condition occurs when cleaning hard floors. When cleaning a carpet, the air speed adjusting plate 22 is slid toward the center of the main body case 6 to close the ventilation hole 20. That is, brush chamber 1
The air sucked in from the lower surface of the dust collector 3 flows through the ventilation hole 21 having a small air passage cross-sectional area while being throttled in flow velocity, and heads toward the dust collection part 2 while driving the turbine 17. The main body case 6 is often separated from the floor surface each time the direction is changed during cleaning, and at this time the leak hole 29 opens to reduce the suction amount and wind speed flowing through the ventilation hole 21.
Therefore, the rotating brush 16 becomes unloaded by moving away from the floor, and the number of rotations does not increase even though the opening surface of the brush chamber 13 is wide open.
Therefore, rotation noise is small.

In this way, when cleaning a carpet, the rotating brush 16 is driven. The flow rate of the suction airflow in the ventilation hole 21 is fast in the center of the brush chamber 13 and slows down toward the outside.
0 and 19 and the trailing edge of the suction opening 28, the dust that is blown away from the rotating brush 16 toward the center is moved toward the center where the suction airflow becomes faster due to the dust collection guide surfaces 33, 34, and 35. Repelled. Therefore, the dust suction effect is good also on both outer sides of the main body case 6. Further, the large-area dust guide surfaces 33 and 34 rectify outside air with their slopes and guide it toward the center, thereby preventing the generation of turbulent flow and the accompanying noise.

During this dust suction, an air flow flows into the brush chamber 13 from the lateral side openings 12a, so an air flow is generated in the brush chamber 13 toward the central suction air passage 14. Dust collection from both outer portions of 13 is also performed well. Further, due to this airflow, dust is less likely to collide with the rear wall of the brush chamber 13, and a good dust collection effect is achieved.

Although the dust collection guide surfaces 33, 34, and 35 are formed in an arc shape and inclined, they may be formed in a straight line and inclined.

This invention is also applicable to a type of floor cleaning tool in which the main body case is equipped with an electric blower and a dust collection section.

Effects of the invention Since this invention is configured as described above, there is a certain limit to the distance between the rotating brush and the suction air path.
As for the width of the suction opening in the front and back direction, the part facing the suction air path is set larger than the other parts, so it is possible to suck up even relatively large amounts of dust.
In addition, although the speed of the suction airflow is high in the suction air passage, the width of the suction opening in that portion in the longitudinal direction is large, so even if the suction air volume is the same, the speed of the suction airflow must be lowered. This has the effect of reducing noise caused by wind noise.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is a side view showing the overall configuration on a reduced scale, Figure 2 is a perspective view showing the inside of the main case with a part cut away, and Figure 3 is a plan view showing the inside of the main case with the upper case removed. 4 are bottom views of the main body case. 4...Extension pipe (connection pipe), 6...Main case, 13...Brush chamber, 14...Suction air path, 16
...Rotating brush, 28...Suction opening.

Claims (1)

[Scope of utility model registration request] A brush chamber in which a rotating brush is installed and a horizontally elongated suction opening opened at the bottom of the main body case, a connecting pipe to the vacuum cleaner side, and a suction air path communicating these brush chambers and the connecting pipe. In the floor cleaning tool, the trailing edge of the horizontally elongated suction opening is inclined so that the width of the portion facing the suction air path in the front-rear direction is larger than that of the other portion. Floor cleaning tools.