JPS6320529B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a suction port body for a vacuum cleaner.

BACKGROUND ART Conventionally, a suction port body has been used in which a turbine rotated by suction airflow and a brush are connected and housed in a main body case that runs on the floor. In such a suction port body, the gap between the suction opening and the floor surface is constant, so it can be used in the same condition even when cleaning a soft floor surface such as a carpet and a hard floor surface such as between boards. are doing.

Problems to be Solved by the Invention In the case of a soft floor surface such as a carpet, the speed of the suction airflow is required to be high in order to suck up dust from the depths of the carpet. In the case of a hard floor surface, it is required that the gap between the suction opening and the floor surface be large so that large amounts of dust can be sucked even if the speed of the suction airflow is slow.

An object of the present invention is to obtain a suction port body for a vacuum cleaner that can change the degree of opening with respect to a floor surface depending on the speed of suction airflow.

Measures to solve the problem: A rotating brush is provided in the brush room with openings on the floor and lower front, and a horizontally long air passage adjustment cover with a semicircular cross section is rotatably provided around the outer periphery of the rotating brush. A control valve is provided to adjust the gap between the suction opening of the communicating ventilation path and the floor surface, and the air path adjustment cover is rotated in conjunction with the slide of the control valve.

Effect When the ventilation hole is narrowed by the control valve, the speed of the suction airflow increases, causing the turbine to rotate at high speed.
The rotating brush is driven at high speed, and at this time, the air flow control cover rotates to reduce the gap between the suction opening of the brush chamber and the floor, making it suitable for cleaning carpets. When the ventilation holes are opened, the speed of the suction airflow decreases, the rotation of the turbine decreases, and the rotating brushes are not driven, which increases the gap between the suction opening of the brush chamber and the floor surface, making it difficult to collect large amounts of dust. Suitable for hard floor surfaces.

Embodiment An embodiment of the present invention will be described based on the drawings.
A main body case 5 is provided which is connected to a dust collecting section 2 of a vacuum cleaner 1 via an extension pipe 3 and a suction hose 4. This main body case 5 is made by assembling an upper case 6 and a lower case 7, and when assembled, a rotary tube 8 connected to the extension tube 3 and a bumper 9 are sandwiched. The main body case 5 has a partition wall 1.
0, 11, and 12, a brush chamber 14 that accommodates the brush 13 and a ventilation passage 1 that accommodates the turbine 15 are provided.
6 and a transmission chamber that connects the brush 13 and the turbine 15 by a belt (not shown) as a driving member, and a suction opening 1 is formed on the lower surface of the brush chamber 14.
9 is formed. A ventilation hole 20 is formed in the center of the partition wall 10 to communicate the brush chamber 14 and the ventilation passage 16. Note that the partition walls 10, 11, and 12 are formed in the upper case 6 and the lower case 7, and are edge-jointed to each other in a vertical relationship.

Next, a control valve 21 is provided in the lower case 7 so as to be slidable along the partition wall 10. An operation knob 22 serving as an operation body for the control valve 21 is slidably held by a guide rib 23 formed on the lower case 7, and a knob 24 formed on the operation knob 22 protrudes from the upper part of the upper case 6.

Next, a horizontally elongated air passage adjustment cover 42 is attached to the brush chamber 14 so as to be rotatable about the left and right axes. The air passage adjustment cover 42 has a semicircular cross section, and a spiral protrusion 43 that protrudes toward the outer circumference is formed on a portion of its circumferential surface. and,
A holding portion 44 that sandwiches and slidably engages the projecting piece 43 at the top and bottom is integrally formed with the control valve 21 .
Next, concave side air passages 45 communicating with the brush chamber 14 and a notch 46 opening in the middle of these side air passages 45 are formed on both sides of the lower case 7. Closing plates 47 that are inserted into the notches 46 are integrally formed at both ends of the air passage adjusting cover 42 , and these closing plates 47 have the side air passages 45 .
A notch 48 is formed opposite to. Further, the main body case 5 is provided with a wheel 27 serving as a rear wheel and a wheel 35 serving as a front wheel, but the axle positions of these wheels 27 and 35 are fixed.

In such a configuration, when cleaning a carpet, the control valve 21 is slid toward the center of the main body case 5 to narrow the ventilation hole 20. At this time, since the sliding holding part 44 and the protruding piece 43 are engaged, the air passage adjustment cover 42 is rotated clockwise as shown in FIG.
One side edge of is close to the floor surface 36. That is, the gap h between the front edge of the suction opening 19 and the floor surface 36 is small.
At this time, the notch 48 of the closing plate 47
5, it also shows the dust suction action from the outside in the direction of travel where the brush 13 is not joined. When sliding the control valve 21 to the opposite side to stop the turbine 15,
The air passage adjustment cover 42 rotates counterclockwise from the state shown in FIG. 5a to the state shown in FIG. 5b, and the suction opening 19
The gap h' between the leading edge of the front edge and the floor surface 36 becomes larger. This makes it possible to vacuum up large debris. At this time, the side air passage 45 is closed by the closing plate 47 due to the rotation of the air passage adjustment cover 42.

Effects of the Invention As described above, the present invention provides a main body case that runs on the floor, and a wall that partitions the suction air passage connected to the dust collection part of the vacuum cleaner and the brush chamber that opens toward the floor and the front lower part. A turbine is housed in the suction air passage, and a rotary brush driven by the turbine via a drive member is housed in the brush chamber, wherein the rotary brush has a cross section on its outer periphery. A semi-circular and horizontally long air passage control cover is rotatably installed, and a control valve is installed to adjust the gap between the suction opening of the ventilation passage communicating with the turbine room and the floor surface. Since the passage control cover is rotated, when the ventilation hole is narrowed by the control valve, the speed of the suction airflow increases, causing the turbine to rotate at high speed, which drives the rotating brush at high speed. The airflow control cover rotates to reduce the gap between the suction opening of the brush chamber and the floor surface, making it suitable for cleaning carpets, and opening the ventilation hole with the control valve increases the speed of the suction airflow. decreases and the rotation of the turbine decreases,
The rotating brush is not driven, and the gap between the suction opening of the brush chamber and the floor is increased, making it suitable for hard floors where large amounts of dust are collected.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view with the whole reduced in size, Fig. 2 is a perspective view with a part of the main body case cut away, and Fig. 3 shows the air passage. Fig. 4 is an exploded perspective view of the control cover and control valve, Fig. 4 is an exploded perspective view of a part of the main body case and air passage control cover seen from the bottom side, and Fig. 5 a and b correspond to different cleaning forms. FIG. 3 is a longitudinal side view showing the internal structure. 5... Main body case, 10, 11, 12... Partition wall, 13... Brush, 14... Brush chamber, 15...
... Turbine, 16 ... Ventilation passage, 19 ... Suction opening, 20 ... Ventilation hole, 21 ... Control valve, 22 ...
Operation knob (operation body), 24...knob, 36...
Floor surface, 42...Air passage adjustment cover, 43...Protrusion piece,
44...Holding section.

Claims (1)

[Claims] 1. A main body case that runs on the floor is connected to a suction air passage connected to the dust collection part of the vacuum cleaner and a brush chamber having a suction opening that opens toward the floor and the front lower part. A turbine is housed in the suction air passage, and a rotating brush driven by the turbine via a drive member is housed in the brush chamber. , an air passage adjustment cover that is formed into a horizontally elongated shape with an arcuate cross section and has a spiral protrusion on the outer periphery is rotatably provided on the outer periphery of the rotating brush, and has a knob that projects outside of the main body case. A control valve is slidably attached to the main body case, and a control valve connected to the operating body to open and close the ventilation hole is slidably provided on the partition wall, and a holding portion formed on the control valve is attached to the spiral-shaped control valve. A suction port body for a vacuum cleaner, characterized in that it is slidably engaged with a protrusion.