JPS6138519Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a suction port body for a vacuum cleaner.

Conventionally, cleaning has been carried out by sliding a suction opening at the bottom of a vacuum cleaner, which is connected to a dust collecting section, along the floor surface. When cleaning hard floors, there will be a slight gap between the bottom surface of the suction port and the hard floor, allowing sufficient outside air to be sucked in, and the vacuum level inside the main body case will be low, allowing for good running performance. It is.
However, when cleaning a carpet, the longer the hair, the more closely it adheres to the lower surface of the suction port and blocks the suction opening, resulting in a high degree of vacuum within the main body case and poor running performance.

Therefore, there is a device in which a ventilation hole is formed in a location other than the bottom surface of the main body case so that the degree of vacuum within the main body case does not increase even if the suction opening comes into close contact with the carpet when cleaning a carpet. However, such a device has the disadvantage that the ventilation hole is always open, which reduces the dust suction effect, and on the other hand, if the ventilation hole is small, the effect cannot be obtained.

For this reason, as seen in Utility Model Publication No. 46-7809 and Utility Model Application Publication No. 52-63963, a one-way valve was installed that automatically opened depending on the internal vacuum level. Something exists. In this type of valve, the valve automatically returns when the degree of vacuum decreases, so the dust collection effect does not deteriorate. However, this type of valve requires separate parts to form the valve, and also requires mounting parts for the valve, making the installation work difficult.

This idea was devised in view of these points, and was designed to create a suction port body for a vacuum cleaner that can form a valve without adding any special parts or performing any special assembly work. The purpose is to obtain.

This device forms a main case by assembling an upper case and a lower case with a bumper made of a cushion member interposed between the upper case and the lower case, and this main case has a ventilation passage connected to the dust collection part of the vacuum cleaner and a floor. a suction opening that opens toward the surface, and a ventilation hole that opens to the ventilation passage and communicates with the outside air in the mounting portion of the bumper of the main body case, and a position that corresponds to the ventilation hole; The bumper is characterized in that two slits with one side edge left are formed within the ventilation hole, and these slits form a valve for opening and closing the ventilation hole.
Therefore, since the valve is formed using a bumper that inherently has cushioning properties, it is possible to easily obtain the elasticity to open the valve when the suction opening is blocked and the internal pressure in the ventilation hole decreases. This function can be obtained by the ventilation holes in the main body case and the slits in the bumper, so just by forming those ventilation holes and slits when manufacturing the parts, the valve can be formed by performing normal bumper assembly. This eliminates the need for separate parts and eliminates the need for separate assembly of the valve.

An embodiment of this invention will be described based on the drawings. First, a vacuum cleaner 1 having a built-in electric blower (not shown) is provided. This vacuum cleaner 1
A suction hose 3 and an extension pipe 4 are sequentially connected to the dust collecting section 2, and a main body case 6 having a rotary pipe 5 connected to the extension pipe 4 is provided. This main body case 6 is constructed by assembling an upper case 7 and a lower case 8 with a bumper 9 made of a cushion member interposed therebetween. The inside of the main body case 6 has a partition wall 1 that joins the upper case 7 and the lower case 8 to each other.
0, 11 are formed, and these partition walls 10, 11
Thus, an operation chamber 12 and a ventilation passage 13 communicating with the rotary tube 5 are formed. A partition plate 14 is detachably held on the partition walls 10 and 11, and the ventilation passage 13 is divided into a suction chamber 15 and a brush chamber 16 by the partition plate 14.
This brush chamber 16 has a rotating brush 1 driven by a turbine 17 provided in the suction chamber 15.
8 is constructed, and the suction chamber 15 and the brush chamber 1
6 refers to ventilation holes 19 and 2 formed in the partition plate 14.
They are connected by 0. And this ventilation hole 2
0 is formed smaller than the ventilation hole 19 and is formed on the turbine 17 side;
is opened and closed by a wind speed adjustment plate 22 having an operation section 21 slidably provided in the operation chamber 12.

Therefore, the lower case 8 of the brush chamber 16
has a suction opening 24 that opens toward the floor surface 23;
Ventilation holes 25 that open toward the front and side surfaces are formed, and a valve 26 that opens these ventilation holes 25 by a flexible action by negative pressure and closes them by a restoring action by elasticity is formed in a part of the bumper 9. It is provided by forming two parallel slits 27 with side edges remaining.

Further, a front wheel 28 and a rear wheel 29 are attached to the lower case 7 for driving the main body case 6 against the floor surface 23, and these wheels 28 and 29 move the main body case 6 toward the hard floor surface 23 and the opening of the suction opening 24. A gap is formed between the surfaces.

In such a configuration, when cleaning the hard floor surface 23, the outside air containing dust can be sufficiently removed by forming a slight gap between the floor surface 23 and the opening surface of the suction opening 24. By being sucked in and maintaining a low vacuum inside the brush chamber 16,
The valve 26 does not flex against the negative pressure and closes the vent hole 22, so that the dust suction force is strong and the running performance is good. As shown in FIG. 2, the ventilation hole 19 is open together with the ventilation hole 20 on the turbine 17 side.
Most of the suction airflow bypasses the turbine 17 through the larger vent 19, and the turbine 17 and rotating brushes 18 are not driven. Next, the outside air containing dust that has passed through the ventilation holes 19 and 20 is passed through the extension pipe 4.
Only the outside air that flows into the dust collecting section 2 of the vacuum cleaner 1 through the filters, etc., and is purified by the filter is discharged to the outside of the vacuum cleaner 1.

Therefore, when cleaning the floor surface 23 of the carpet, the bristles of the carpet come into close contact with the suction opening 24, and the degree of vacuum in the brush chamber 16 becomes high. Therefore,
The valve 26 is bent into the brush chamber 16 by negative pressure, opens the vent hole 25, and sucks outside air into the brush chamber 16 through the vent hole 25. Therefore, the brush chamber 16
There is no shortage of airflow sucked into the main body case 1, damage to the electric blower due to temperature rise is prevented, and the running performance of the main body case 1 is good because the suction opening 24 does not stick to the carpet. When cleaning the carpet, slide the operation part 21 and close the ventilation hole 19 with the wind speed adjustment plate 22.
The turbine 17 is driven by the wind of outside air containing dust passing through the ventilation hole 20, and therefore the rotating brush 18 is driven to sweep out the dust between the piles of the carpet. The swept-out dust is then sucked in by the suction air current. In this way, the ventilation hole 2 is bent by the negative pressure and the restoring action by the elasticity in response to changes in the degree of vacuum in the brush chamber 16.
By opening and closing the valve 26, there is no need to operate the valve 26, making it easy to handle.

Since this device is constructed as described above, the valve is formed using a bumper that inherently has cushioning properties, so that the elasticity to open the valve when the suction opening is blocked and the internal pressure in the ventilation hole decreases can be easily obtained. The function as a valve can be achieved by the ventilation holes in the main body case and the slits in the bumper, so just by forming those ventilation holes and slits when manufacturing the parts, you can easily assemble the bumper. By performing this, a valve is formed, which has the advantage that no separate parts are required, and there is no need to separately assemble the valve.

[Brief explanation of drawings]

The drawing shows one embodiment of this invention.
The figure is a side view with the whole scaled down showing the state of use.
The figure is a perspective view showing the inside of the main case with a part of the upper case cut away, Figure 3 is an enlarged perspective view of the main parts, and Figure 4 is an enlarged perspective view showing the state of cleaning a hard floor surface. FIG. 5 is an enlarged longitudinal sectional side view showing a state in which a carpet is being cleaned. 1...Vacuum cleaner, 2...Dust collecting section, 6...Main case, 13...Ventilation passage, 23...Floor surface, 24...
...Suction opening, 25...Vent hole, 26...Valve.

Claims (1)

[Scope of utility model registration request] A main case is formed by assembling the upper case and the lower case with a bumper made of a cushion member interposed between the upper case and the lower case. A ventilation hole is formed in the mounting portion of the bumper of the main body case to open to the ventilation passage and communicate with the outside air, and a ventilation hole is formed in the bumper at a position corresponding to the ventilation hole. A suction port body for a vacuum cleaner, characterized in that two slits with one side edge left are positioned within the ventilation hole, and these slits form a valve for opening and closing the ventilation hole.