JPH0137141B2 - - Google Patents

Description

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

Conventionally, there are devices in which both ends of the suction air passage are opened to the outside to suck in dust from the corners. In this type of device, the side opening formed in the corner and the suction port are connected separately with a pipe, etc., and a valve is installed in this pipe to control the air flow when dust is sucked in from the corner and when it is not sucked in. is changing the flow of

However, in conventional devices, the means for sucking in dust from corners is controlled by opening and closing valves, and it may not be possible to obtain sufficient suction airflow, or the pipe that serves as the passageway may become clogged. There are some inconveniences.

This invention was made in view of these points, and provides a vacuum cleaner that can effectively suck up dust from corners without complicating the structure or impairing the running performance of the floor surface. The purpose is to obtain.

This invention provides a horizontally elongated suction air path that is entirely open toward the floor and both ends are open toward the outside, at the bottom of the main body that is provided with the connection section that connects to the dust collection section of the vacuum cleaner. A central portion of the suction air passage forms a suction port that communicates with the connecting portion, and a roller that rolls on the floor surface is provided to be movable up and down, and the air passage cross-sectional area of the suction air passage is varied in the main body. A control valve is provided movably, and an actuator for maintaining the control valve and the roller at predetermined positions is provided on the main body and connected to an operating section. Therefore, when the air passage cross-sectional area of the suction air passage is large, the amount of protrusion of the roller is large, so the gap with the floor is large and running performance is good, and when the air passage cross-sectional area is small, Since the amount of protrusion of the rollers is small, the gap between the rollers and the floor surface is small, and the ability to suck in dirt from the corners is improved.

An embodiment of the present invention will be described based on the drawings. 1 is the main body. This main body 1 is constructed by assembling an upper case 2 and a lower case 3 with a packing 4 in between. A T-shaped connecting tube 5 serving as a connecting portion is held between the upper case 2 and the lower case 3 so as to be movable up and down with an axis in the left and right direction. A swing tube 6, which is connected to a dust collecting section of a vacuum cleaner (not shown) via an extension tube or a suction hose, is fitted to the rear of the connecting tube 5 so as to be able to swing freely in the left and right directions.
Further, wheels 7 are attached to both sides of the rear of the main body 1, and support members 9 for holding rollers 8 are attached to both sides of the bottom surface so as to be able to move up and down while being biased upward by a spring 10.

Next, a horizontally elongated suction air passage 12 along the brush 11 is formed at the bottom of the main body 1. The entire surface of this suction air passage 12 is open toward the bottom surface, and both ends thereof are open toward the outside. A suction port 13 communicating with the connecting pipe 5 is formed in the center of the suction air passage 12 .

Thus, the control valves 14 and 15 that vary the air passage cross-sectional area of the suction air passage 12 are urged forward by the spring 16 and are held movably in the front-rear direction. These control valves 14 and 15 have pins 18 located on both sides of the suction air passage 12 and protruding from long holes 17 formed in the ceiling surface of the suction air passage 12. Further, a slider 19, which is an operating body, is held in the main body 1 so as to be slidable while being biased toward one side by a spring 20. Furthermore, a dial 21 serving as an operating section is attached to the top surface of the main body 1, and a gear 23 that meshes with a rack 22 formed on the slider 19 is coaxially connected to this dial 21. A notch 24 is formed in a part of the outer periphery of this gear 23. Further, on both sides of the slider 19, pressing portions 25 and 26 for pressing the pin 18 rearward and a pressing portion 28 for pressing a protrusion 27 formed on the upper surface of the support member 9 are formed. A cylinder 30 is formed on the ceiling surface of the suction air passage 12 and holds the steel ball 29 so as to be movable up and down while urging the steel ball 29 upward. This steel ball 29 engages with one of a number of concave portions arranged radially on the lower surface of the gear 23 to stabilize the gear 23 together with the dial 21 at any rotational position.

In such a configuration, cleaning is performed by connecting the swirl tube 6 to the dust collecting section of a vacuum cleaner. That is, outside air is sucked into the suction port 13 from the suction air path 12 and is collected in the dust collecting section.

In the state shown in FIG. 7a, the control valves 14 and 15 are moved forward, and the cross-sectional area of the suction air passage 12 is maintained at its maximum on both sides. Further, the support member 9 is a slider 19
The amount of protrusion S of the roller 8 when pressed by the pressing portion 28 is large. Therefore, it sucks in dust over a wide area.

From this state, operate dial 21 to shift gear 23.
When turned, the slider 19 moves to the left, the pressing part 26 on the right pushes the pin 18 on the right, the control valve 15 on the right gradually narrows the cross-sectional area of the suction air passage 12, and the gear In the state shown in Figure 7b, where 23 has rotated 1/4,
The air passage cross-sectional area on the right side of the suction air passage 12 becomes zero.
Also, at this time, the pressing part 28 of the slider 19 releases the protrusion 27 of the support member 9, so the support member 9
is raised by the force of the spring 10, and the protrusion amount S of the roller 8 from the bottom surface of the main body 1 becomes smaller.

Furthermore, when the slider 19 is slid to the left, the left pressing part 25 pushes the left pin 18 backward, and the left control valve 14 also gradually narrows the air passage cross-sectional area of the suction air passage 12. 7th with 1/2 rotation of 23
In the state shown in FIG. c, the air passage cross-sectional area of the suction air passage 12 is maintained at zero on both the left and right sides. The protrusion amount S of the roller 8 is also maintained small.

Further, when the slider 19 is slid to the left, the right pressing part 26 releases the pin 18, and the right regulating valve 15 is slid forward little by little by the force of the spring 16, thereby forming the air passage of the suction air passage 12. In the state shown in FIG. 7d, in which the cross-sectional area is expanded and the gear 23 rotates 3/4, the cross-sectional area of the air passage on the right side of the suction air passage 12 is maintained at its maximum. The protrusion amount S of the roller 8 is also maintained small as usual.

When the gear 23 is further turned, the notch 24 can be easily removed 22.
Since the slider 19 faces the spring 20
The force returns to the right and returns to the state shown in Figure 7a.

Therefore, if you want to suck in dust from a wide area, you can clean it in the condition shown in Figure 7a, and if you want to suck in dust from the corner of the room, you can clean it as shown in Figure 7b or d. It is sufficient to set the cross-sectional area of the air passage on one side of 12 to zero and increase the suction wind force from the other side. It is also possible to close one side of the suction air passage 12 and narrow the cross-sectional area of the air passage on the other side within a range that does not become zero, making it possible to further strengthen the suction wind force and suck out the dust in the room. Moreover, the protrusion amount S of the roller 8
is small, so the suction wind force becomes even stronger. Also,
When sucking dust from the end of the suction air passage 12, the gap between the main body 1 and the floor is small and the dust may get caught at the end of the suction air passage 12, but the end of the suction air passage 12 opens outward. Since the entire body is opened toward the floor surface, even if the dust is a little large, by lifting the main body 1 from the floor surface, the dust moves away from the end of the suction air passage 12 and is sucked in through the suction port 13.

Furthermore, since the control valves 14 and 15 are located on both sides of the suction air passage 12, it is possible to close both sides of the suction air passage 12 as shown in FIG. be.

When cleaning a carpet, the main body 1 sinks to the surface of the carpet, so as shown in FIG. Just inhale over a wide area. In this case, the adjustment of the air passage cross-sectional area of the suction air passage 12 and the position adjustment of the roller 8 can be performed with one touch by simply turning one dial 21.

Note that a knob (not shown) that projects outward from the main body 1 may be integrally formed on the slider 19, and this knob may be used as an operating section.

As described above, this invention provides a vacuum cleaner with a connection part connected to the dust collecting part of the vacuum cleaner at the bottom of the main body.
It forms a horizontally long suction air passage whose entire surface is open toward the floor and both ends are open toward the outside, and a suction port that communicates the central part of this suction air passage with the connection part, and which rolls on the floor surface. A roller is installed that can move up and down,
The main body is provided with a movable control valve that changes the cross-sectional area of the air passage of the suction air path, and the main body is provided with an actuating body connected to an operating portion to maintain the control valve and the roller at predetermined positions. Therefore, when the cross-sectional area of the suction air path is large, the protrusion amount of the roller is large;
Therefore, when the gap with the floor is large and rolling properties are good, and the cross-sectional area of the air passage is small,
Since the amount of protrusion of the roller is small, the gap between the roller and the floor surface is small, which has the effect of increasing the ability to suck in dirt from corners.

[Brief explanation of drawings]

The drawings show one embodiment of the invention.
The figure is a reduced perspective view, Figure 2 is a partially cutaway perspective view, Figure 3 is a central vertical side view, Figure 4 is a side vertical side view, and Figure 5 is a partially cutaway front view. ,
FIG. 6 is a longitudinal sectional front view of a portion of the dial rotation prevention means, and FIG. 7 is an operation explanatory diagram showing the operation of the slider in a plan view and the operation of the control valve and rollers in left and right longitudinal sectional side views. . 1...Main body, 5...Connection pipe (connection part), 8...
Roller, 12... Suction air path, 13... Suction port, 1
4 to 15...Control valve, 19...Slider (operating body), 21...Dial (operation unit).

Claims (1)

[Claims] 1 At the bottom of the main body, where the connection part that connects to the dust collection part of the vacuum cleaner is provided, there is a horizontally long suction air passage that opens entirely toward the floor and both ends open outward, and this suction air passage. A suction port is formed in which the central part of the passage communicates with the connection part, and rollers that roll on the floor surface are provided on the lower surfaces of both sides so as to be movable up and down, and the air passage cross-sectional area of the suction air passage is varied in the main body. 1. A suction port body for a vacuum cleaner, characterized in that a control valve is movably provided, and an actuator for maintaining the control valve and the roller at predetermined positions is provided on the main body and connected to an operating section.