JPH0221247B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a suction port body for a vacuum cleaner suitable for cleaning carpets.

BACKGROUND ART Conventionally, in the suction port body of a vacuum cleaner, as shown in FIGS. 1 and 2, a main body case 1 is composed of an upper case 2 and a lower case 3. The turbine 5 and the attachment part 7 of the rotary tube 6 are attached to the partition wall 4 formed in each of the turbines 3 and 3, and the axis of the turbine 5 is positioned above the axis of the attachment part 7, so that the turbine 5 is rotated by the suction airflow. The suction airflow is efficiently introduced into the turbine 5.

Problems to be Solved by the Invention In this type of device, a step must be provided on the joint surface 8 of the partition wall 4 due to the different axes of the turbine 5 and the mounting portion 7. Therefore, it is difficult to align the upper case 2 and the lower case 3 when joining them together, and sometimes there is a problem that a gap is formed in the joint surface 8 and leakage occurs from this gap during cleaning. Another problem is that the mold for the main body case 1 becomes complicated.

Means for Solving the Problems A main case in which a turbine chamber is formed at the rear and a brush chamber is formed at the front by joining an upper case having a partition wall and a lower case having a partition wall by joining the partition walls to each other. The turbine is rotated by the suction airflow from the vent provided in the partition plate that partitions the turbine chamber and the brush chamber, and its axis center O ₁
is housed in the turbine chamber at the same height as the joining surface of the partition wall, and has a connecting part connected to a dust collection part of a vacuum cleaner and a mounting part of a front opening perpendicular to this connecting part. A rotary tube is provided at the rear of the turbine chamber so as to be freely rotatable up and down, and the mounting portion of the rotary tube surrounds the turbine, and the axis O ₂ of the mounting portion is the same as the axis O ₁ of the turbine. The mounting portion of the rotary tube is formed into an arc shape with an upper and lower portion having different radii of curvature, and the radius of curvature of the upper portion of the mounting portion is smaller than the radius of curvature of the lower portion.

In addition, a gap is provided between the upper part of the mounting part and the inner surface of the lower case to serve as a leakage air path, and the upper tip of the mounting part of the rotary tube slides on the arc-shaped sliding surface formed on the inner surface of the upper case. A closing body that contacts the gap and closes the gap is provided, and the sliding surface is formed from a front sliding surface having a curvature that matches the rotational trajectory of the distal end of the closing body and the rotational trajectory of the distal end of the closing body. The rear sliding surface has a large curvature.

Function Since the axis O ₁ of the turbine and the axis O ₂ of the rotary tube are located at the same height, the joint surfaces of the partition walls can be located in the same plane, which allows the upper case and the lower case to When joining the case to form the main case, the partition wall can be easily joined, the molds for the upper case and the lower case can be easily manufactured, and moreover, the mold for surrounding the turbine can be easily joined. The radius of curvature of the mounting part of the rotating tube is formed into different arc shapes for the upper and lower parts, and the radius of curvature of the upper part is smaller than that of the lower part, so the turbine suction can be easily accommodated without increasing the height of the main body case. A large amount of suction airflow is introduced into the lower part, which receives the airflow, allowing the turbine to rotate smoothly.Also, the leakage air passage that introduces outside air into the turbine chamber is created by the arc-shaped sliding between the mounting part of the rotating pipe and the upper case. It can be easily formed by determining the curvature with the surface, and the leak air path is also formed when the rotating pipe is facing downward, so it is easy to reduce noise when the suction port is moved away from the floor. It is something that can be done.

Embodiment A first embodiment of the present invention will be described based on FIGS. 3 to 7. Upper case 10 and lower case 1
1 is assembled into a main body case 12. This main body case 12 has a rotating brush 13.
A brush chamber 14 accommodating the brush chamber 14 and a turbine chamber 15 communicating with the brush chamber 14 are formed by joining partition walls 16 formed in the upper case 10 and the lower case 11. The joint surfaces 17 of these partition walls 16 are formed in substantially the same plane. A partition plate 18 is attached to the main body case 12 to partition the brush chamber 14 and the turbine chamber 15. A vent hole 20 having a nozzle 19 is formed in this partition plate 18, and a wind speed adjusting plate 21 for opening and closing this vent hole 20 is provided so as to be slidable to open only the nozzle 19.

Therefore, the belt 22 is located in the turbine chamber 15.
A turbine 23 connected to the rotating brush 13 is housed therein. This turbine 23 is rotatably attached to the partition wall 16, its lower part faces the nozzle 19, and its axis O ₁ is located at the same height as the joint surface 17. Further, a rotary pipe 24 is provided which is connected to a dust collecting section (not shown) of the vacuum cleaner. This rotating tube 24
The connecting part 25 bent in a square shape and this connecting part 2
5 and a mounting portion 26 having a front opening that is orthogonal to the turbine _{23 .}
It is positioned forward at the same height as , and is rotatably attached to the partition wall 16 so as to surround the turbine 23 . In addition, this mounting portion 26
is the radius of curvature of its upper part R ₁ is the radius of curvature of its lower part
It is smaller than R ₂ and is formed into an arc shape.
Next, the upper part of the upper case 10 on which the mounting part 26 slides is formed so as to face the upper part of the mounting part 26 in parallel with the rotating tube 24 when it is rotated downward. The upper part on which the mounting part 26 slides has a radius of curvature smaller than that of the rear arc-shaped part of the lower case 11.
There is a leak between the upper part of the upper case 10 on which the mounting part 26 slides and the upper part of the mounting part 26, which introduces outside air into the turbine chamber 15 when the rotary tube 24 is rotated downward. A gap serving as an air passage 27 is formed, and a rib 28 is formed on the mounting portion 26 to serve as a closing body that closes this leak air passage 27 when the rotary tube 24 is rotated upward and prevents the introduction of outside air. has been done. Further, the mounting portion 26 has a rib 2 that airtightly engages with the main body case 12.
9 is formed. In addition, in the lower part of the lower case 11, there are the outside of the main body case 12 and the brush chamber 1.
A suction port 30 communicating with 4 is formed. That is, the sliding surface on which the rib 28 slides has a curvature that matches the rotation trajectory of the tip of the rib 28, and the rear portion has a curvature larger than the rotation trajectory of the tip of the rib 28. It is formed by a sliding surface.

In such a configuration, the axis of the turbine 23
O ₁ and the axis O ₂ of the attachment part 26 of the rotary tube 24 are located at the same height as the joint surface 17 of the partition wall 16, and the turbine 23 and the attachment part 26 are supported on the partition wall 16. Joint surface 17 of partition wall 16
are located on substantially the same plane without inclination, so that when the upper case 10 and the lower case 11 are combined to form the main case 12, the joint surfaces 17 can be easily brought into contact and the joint surfaces 17 can be easily contacted to prevent leakage. There is no formation of long gaps. In addition, the main body case 12
The mold for molding is simplified. Furthermore, since the upper part of the mounting part 26 is formed with a smaller radius of curvature than the lower part, and the part of the upper case 10 on which the mounting part 26 slides is formed along it, the height of the main case 12 is reduced.

Then, as shown in FIG. 6, when the rotary tube 24 is rotated upward and connected to the dust collecting section of the vacuum cleaner and an electric blower (none of which is shown) is driven, the rotary tube 24 first rotates. The tube 24 becomes under negative pressure. A leak air passage 27 is formed in the main body case 12 between the attachment part 26 and the upper case 10, and the leak air passage 27 is kept airtight by the ribs 28 formed on the attachment part 26. Therefore, the negative pressure state of the rotary tube 24 extends to the suction port 30, so that outside air containing dust is sucked in only from the suction port 30. This outside air is passed through the nozzle 19, the turbine chamber 15, and the rotating pipe 24.
The outside air ejected from the nozzle 19 smoothly rotates the turbine 23, and this rotational force is transmitted to the rotating brush 13 to smoothly sweep up the carpet. The reason why the turbine 23 rotates well at this time is because it is provided as follows. That is, first, the rotating tube 2 surrounding the turbine 23
The mounting portion 26 of No. 4 is provided so that its axis coincides with the turbine 23, and the radius of curvature is gradually decreased from the bottom to the top. is formed large, which causes the nozzle 1
Most of the outside air from 9 passes below the turbine 23. Second, since the blades of the turbine 23 are shaped so that they can easily receive outside air passing through the lower part thereof, they do not rotate or are prevented from rotating by the outside air passing through the upper part.

Note that the radius of curvature of the mounting portion 26 is set to become smaller from the bottom to the top, and the turbine 23
By forming the blades so as to easily receive the outside air passing through the lower part, the turbine 23 can be rotated efficiently and the height of the main body case 12 can be reduced.

Then, during this cleaning, the suction port 29 may become clogged with dust or the like, making it impossible to suck in outside air and putting a strain on the electric blower, but the rotary tube 24 is rotated downward as shown in FIG. and the mounting part 26
Rib 2 formed at the top tip with a small radius of curvature
8 is removed from the upper case 10 and the leak air passage 27 is opened, so that only outside air is sucked in from the leak air passage 27, flows into the turbine chamber 15, and then is supplied to the electric blower. Therefore, damage to the electric blower due to the inability to supply outside air is prevented.

Effects of the Invention As described above, in this invention, since the axis O ₁ of the turbine and the axis O ₂ of the rotary tube are located at the same height as the joint surface of the partition wall, the joint surface of the partition wall is can be located in the same plane, thereby
When the upper case and the lower case are joined together to form the main case, the partition wall can be easily joined, and the molds for the upper case and the lower case can be easily manufactured. The radius of curvature of the attachment part of the rotary tube that surrounds the turbine is formed into different arc shapes for the upper and lower parts, and the radius of curvature of the upper part is made smaller than the radius of curvature of the lower part, so that the height of the main body case can be increased. A large amount of suction airflow is introduced into the lower part of the turbine, which receives the suction airflow of the turbine, allowing the turbine to rotate well.
The leak air path that introduces outside air into the turbine room can be easily formed by determining the curvature of the rotary tube attachment part and the arcuate sliding surface of the upper case. This structure allows the noise to be easily reduced when the suction port body is removed from the floor surface.Furthermore, the blocker that blocks the leak air path prevents the conduction of the leak air path. At times, the air flow can be partially constricted to increase the sound deadening effect.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional side view showing a conventional example, FIG. 2 is a perspective view showing a portion held by the turbine and rotating tube, and FIG. 3 is a perspective view showing an embodiment of the present invention.
Fig. 4 is a plan view with the case removed, Fig. 5 is a perspective view showing the part that holds the turbine and rotating tube, and Fig. 6 shows the rotating tube rotated upward. FIG. 7 is a vertical side view showing the rotary tube in a downwardly rotated state; FIG.
The figure is a longitudinal side view showing the main parts. 10... Upper case, 11... Lower case, 12...
...Body case, 13...Rotating brush, 20...Vent, 23...Turbine, 24...Rotating tube, 25
. . . Connection portion, 26 . . . Mounting portion, 27 . . . Leak air path, 28 .

Claims (1)

[Scope of Claims] 1. A main body case in which a turbine chamber is formed in the rear part and a brush chamber is formed in the front part by joining an upper case having a partition wall and a lower case having a partition wall by joining the partition walls to each other. The turbine is rotated by airflow from a vent provided in a partition plate that partitions the turbine chamber and the brush chamber, and the turbine is rotated by its axis.
O ₁ is housed in the turbine chamber at the same height as the joint surface of the partition wall, and includes a connection part connected to the dust collection part of the vacuum cleaner and a mounting part of the front opening perpendicular to this connection part. A rotary tube is provided in the rear part of the turbine chamber so as to be freely rotatable up and _{down .} and the mounting part of the rotary tube is formed into an arc shape with an upper and lower radius of curvature, and the radius of curvature of the upper part of the mounting part is smaller than the radius of curvature of the lower part. Characteristic vacuum cleaner suction body. 2. An upper case having a partition wall and a lower case having a partition wall are connected by joining the partition walls to each other to provide a main case in which a turbine chamber is formed in the rear part and a brush chamber is formed in the front part, and the turbine chamber and the lower case are combined. The axis of the turbine rotates due to the intake airflow from the vent provided in the partition plate that partitions the brush chamber.
O ₁ is housed in the turbine chamber at the same height as the joint surface of the partition wall, and includes a connection part connected to the dust collection part of the vacuum cleaner and a mounting part of the front opening perpendicular to this connection part. A rotary tube is provided in the rear part of the turbine chamber so as to be freely rotatable up and _{down .} and the mounting portion of the rotary tube is formed into an arc shape with an upper and lower portion having different radii of curvature, and the radius of curvature of the upper portion of the mounting portion is smaller than the radius of curvature of the lower portion. At the same time, a gap is provided between the upper part of the mounting part and the inner surface of the upper case to serve as a leakage air path, and an arcuate sliding portion is formed on the inner surface of the upper case at the upper end of the mounting part of the rotary tube. A closing body that slides into contact with a surface to close the gap is provided, and the sliding surface is connected to a front sliding surface having a curvature that matches the rotation locus of the tip of the closing body and the rotation of the tip of the closing body. A suction port body for a vacuum cleaner, characterized in that it is formed with a rear sliding surface having a larger curvature than a moving trajectory.