JPH11206637A - Suction port body and electric vacuum cleaner using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction port body which keeps the front side of the suction port body from floating above a cleaning surface even when a downward force works on the rear part of the suction port body from a connection pipe in cleaning. SOLUTION: This suction port body 30 is provided with a suction port body 31 having a suction chamber 39 for dust collection opened on a bottom surface, a rotary pipe 32 which is mounted rotatably about a first axial line O1 extending longitudinally of the suction port body 31 while communicating with the suction chamber 39, a connection pipe 33 which is connected to the rotary pipe 32 rotatably about a second axial line O2 orthogonal to the first axial line O1 while communicating with the rotary pipe 32 and a rear wheel 64 mounted at the rear part of the suction port body 31. The rear wheel 64 is positioned backward from the second axis line O2 and mounted at a lower part of the suction port body 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a connecting pipe in which a connecting pipe is rotatably mounted around a first axis extending back and forth with respect to a dust inlet main body and a second axis orthogonal to the first axis. The present invention relates to a suction port body and a vacuum cleaner having the same.

[0002]

2. Description of the Related Art As shown in FIG. 11 (see Japanese Patent Application Laid-Open No. 8-289861), a conventional vacuum cleaner has a cleaner main body 1, a suction port body 2, a dust collection hose 3, and an extension pipe 4 connected thereto. There is something connected through. In FIG. 11, reference numeral 3a denotes a hand operation unit provided at the free end of the dust collection hose 3.

Further, as shown in FIG. 12, the suction port body 2 is held by a hinge female portion 6 provided at a rear portion of the suction port main body 5 and is rotatably held by the hinge female portion 6 in an arbitrary direction. A ball-shaped hinge male part 7, a support body 8 integral with the hinge male part 7,
Connection pipe 9 attached to support 8 as connection
And a telescopic hose 10 for communicating the connection pipe 9 with the inside of the suction port main body 5, and adjustable wheels 11 and 12 mounted on the front end and the rear end of the bottom wall 5 a of the suction main body 5, respectively.

In this vacuum cleaner, the extension pipe 4 can be tilted in any direction about the ball joint A consisting of the male hinge part 6 and the female hinge part 7, so that the extension pipe 4 can be tilted while holding the hand operation unit 3a. Together with the connecting pipe 9 can be tilted in any direction depending on the cleaning place.

[0005]

However, in this vacuum cleaner, since the ball joint A serving as a pivot point is located behind the universal wheel 12 as a rear wheel, an extension pipe and a connection are required for cleaning. A downward force acts on the rear portion of the suction port body 5 from the pipe 9, so that the front side of the suction port body 5 is located on the cleaning surface
3 may be lifted up, and good cleaning may not be possible.

Accordingly, the present invention provides a suction port body in which the front side of the suction port main body does not rise from the cleaning surface even if a downward force acts on the rear portion of the suction port main body 5 from the connecting pipe during cleaning. An object of the present invention is to provide a used vacuum cleaner.

[0007]

In order to achieve this object, a first aspect of the present invention is to provide a suction port main body provided with a suction chamber for dust collection having an opening on a bottom surface, the suction body being connected to the suction chamber; A rotary pipe rotatably mounted around a first axis extending back and forth on the suction port main body; and a rotatable pipe connected to the rotary pipe and rotatable about a second axis orthogonal to the first axis. A connection pipe connected to a rotating pipe; and a rear wheel mounted on a rear portion of the suction port main body, wherein the rear wheel is the second wheel.
A suction port body is provided at a lower portion of the suction port body so as to be located rearward of the axis.

The invention according to claim 2 is characterized in that the rear wheels are provided on the left and right of the connection pipe, respectively.

Further, the invention of claim 3 is characterized in that the vacuum cleaner is provided with the suction opening.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.

In FIG. 10, reference numeral 20 denotes a vacuum cleaner main body;
Is a flexible dust collection hose connected to the cleaner body, 22 is a hand-operated pipe integrally provided at a free end of the dust-collection hose 21, and 22a is a grip portion integral with the hand-operated pipe 22. A suction port body 30 is connected to the hand operation pipe 22 via extension pipes 23 and 24. This suction port body 3
Reference numeral 0 has a suction port main body 31 extending left and right as shown in FIGS. 5, 6, and 10, and a rotating pipe 32 and a connecting pipe 33 as shown in FIGS. In addition, extension pipe 2
4 is detachably connected to the connection pipe 33.

The suction port main body 31 includes a lower case 35,
An upper case 36 is detachably mounted on the lower case 35. Further, the suction port main body 1 has a rear cover 37 held between the rear portions of the cases 35 and 36, and a bumper rubber 38 held between the cases 35 and 36. A suction chamber 39 is formed between the cases 35 and 36, and the lower case 35
The bottom wall 35a is formed with a suction port 35b of a suction chamber 39, and the left and right portions at the rear center of the lower case 35 are formed with rear wheel supporting projections 40, 40 projecting rearward.

In the suction chamber 39, there is provided a rotary cleaning body 41 extending left and right along the suction port 35b. 41
a is the rotating shaft of the rotary cleaning body 41, and 41b is a plurality of blades protruding from the rotating shaft 41a. The left and right ends of the rotating shaft 41a are rotatably held between the cases 35 and 36. Moreover, the blade 41a protrudes in the radial direction of the rotating shaft 41a, and extends to both left and right ends along the rotating shaft 41a. An air inlet 42 is formed in the upper part of the front of the upper case 36, and the suction chamber 39 is provided.
With the suction negative pressure acting inside the suction chamber 39 from the air introduction port 42
When the air is sucked in, the sucked air flow acts on the blade 41b of the rotary cleaning body 41, and the rotary cleaning body 41 is rotated in the direction of arrow B in FIGS.

At the center of the rear cover 37, a tube supporting portion (supporting tube portion) 43 having a center line (first axis O1) as a rotation axis extending in the front-rear direction and projecting rearward is integrally formed. Is formed. The rear cover 37 has a cylindrical portion 4.
3 are formed on both sides of the cover 3a. The cover portions 37a cover the lower wheel supporting protrusions 40 for supporting the rear wheel.

The cylindrical portion 43 communicates with the suction chamber 39. In addition, the cylindrical portion 43 is formed with an annular groove 43a extending in the circumferential direction (not shown in FIGS. 1 and 2 for the sake of illustration) as shown in FIG.
Are rotatably fitted. An engaging member (prevention member) that penetrates the rotating tube 32 and is held by the rotating tube 32.
44 engages with the annular groove 43 a to rotate the rotary tube 32 into the cylindrical portion 43.
To be rotatable and not to come off.

As shown in FIGS. 1 to 3 and FIGS. 7 to 9, a support projection 45 projecting rearward from a substantially half of the end face of the rotary tube 32 is formed at a rear portion of the rotary tube 32. Have been. Support walls 46, 46 are formed on the left and right of the support projection 45, and the support walls 46, 46 have semicircular bearing recesses 4 formed thereon.
7, 47 are formed respectively. The support wall 4
A wall 48 is connected between the inner and outer walls 6 and 46, and the wall 48 has an inner surface 48a having an arc-shaped cross section. This inner surface 48a
Is a direction perpendicular to the cylindrical portion 43 (right and left in FIG. 9).
Extends to. In the drawing, reference numeral 49 denotes a notch between the support walls 46, 46. Further, the support projection 45 has a holding cover (holding member).
Reference numeral 50 is fixed by tapping screws T1, T1 as shown in FIG. The holding cover 50 covers half of the rear end of the rotary tube 32 and the cylindrical portion 43. Moreover, the holding cover 50 has a notch 51 that opens rearward, a support wall 46,
Support walls 52, 52 abutting on 46 are formed. The holding cover 50 has an arc-shaped inner surface 50a formed between the support walls 52, 52. This inner surface 50
a extends along the inner surface 48 a of the wall 48.

Each of the support walls 52, 52 has a semicircular bearing recess 53, 53 corresponding to the semi-bearing recess 47, 47, and a shallow engagement opening to the center of the bearing recess 53, 53. Stop recesses 54, 54 are formed. Also,
The holding cover 50 has locking projections 55, 55 located between the support walls 52, 52 and corresponding to the locking recesses 54, 54.

A bent portion 33a is provided at one end of the connection pipe 33.
Is formed, and a substantially semi-cylindrical seal tube portion 56 is integrally formed at the end of the bent portion 33a. This seal cylinder 5
Reference numeral 6 extends in a direction in which a center line (second axis O2) as a rotation axis is orthogonal to the center line (axis) of the connection pipe 33. 8 and 9, end walls 57, 57 are formed at the axial end of the seal cylinder portion 56.
7, 57, a rotary support shaft 58 coaxial with the seal cylinder portion 56;
58 are protrudingly provided.

The support shaft 58 is rotatably held between the bearing recesses 47 and 53, and the seal cylinder portion 56 has an arc-shaped inner surface 4.
8a, 50a, the inner surface 50a and the seal cylinder 5
An arc-shaped slide member 59 is disposed between the slide member 59 and the slide member 6. A seal projection 60 is formed on the seal cylinder 56 so as to slide on the arc-shaped inner surface 48a. Further, the slide member 59 moves following the movement between the position where the connection pipe 33 is tilted in FIG. 1 and the position where the connection pipe 33 is erected in FIG. 2, and the connection pipe 33 is tilted as shown in FIGS. Then, the gap between the notch 51 and the seal cylinder 56 is closed and sealed.

Further, as shown in FIG.
A locking recess 61 is formed on the outer peripheral surface of the support shaft 6, and a locking projection 62 is formed on the outer peripheral surface of the support shaft 58. When the connecting pipe 33 is raised as shown in FIG. 2, the locking projection 55 engages with the locking recess 61 and the locking projection 62
Engages with the locking recess 54 to hold the connection pipe 33 in the upright position.

Front wheels 63, 63 are rotatably held in the vicinity of both front ends of the bottom surface 35a of the lower case 35, and the rear wheels 6 are provided at the rear ends of the projections 40, 40 for supporting the rear wheels of the lower case 35.
4, 64 are rotatably held (see FIGS. 4 to 6). The rear wheels 64, 64 are located on the left and right of the rotary pipe 32 and the connection pipe 33. Also, the rear wheels 64, 64
The rotation axis (third axis) O3 is located behind the rotation axis (second axis O2) of the seal cylinder portion 56.

Next, the operation of the vacuum cleaner having the suction port 30 having such a configuration will be described.

When the vacuum cleaner is not used, the connecting pipe 3
3 is erected as shown in FIG. In this state, the locking projection 55 engages with the locking recess 61 and the locking projection 62
Engage with the locking recess 54 to hold the connection pipe 33 in the upright position.

From this state, in order to use the suction port body 30 for cleaning, when the grasping portion 22a of the hand operation pipe 22 is grasped and the extension pipes 23, 24 are inclined to the state shown in FIG.
The connecting pipe 33 is inclined from the state of FIG. 2 to the state of FIG.

When the extension pipes 23 and 24 are tilted, the locking projection 55 comes off over the locking recess 61 and the locking projection 62 gets over the locking recess 54. Therefore, the locking projections 55 and 62 are
When the vehicle passes over 54, a force acts in a direction of lifting the front side of the suction port body 30. In addition, such locking projections 55, 6
2 and the locking recesses 61 and 54, the connection pipe 33
When inclining the seal cylinder portion 56 and the inner surfaces 48a, 50a
And a frictional force acts on the front side of the suction port body 30.

At this time, a downward force acts on the seal cylinder portion 56, and the second axis O acting as a center on which the force acts is applied.
Since 2 is located on the front side of the rear wheel 64 (between the front wheel 63 and the rear wheel 64), the front side of the suction opening 30 is not lifted. Further, even when a downward force acts on the suction port main body 31 from the connection pipe 33 during cleaning, the point of application of the downward force is located between the front wheel 63 and the rear wheel 63, so that the suction The front side of the mouth body 30 is not lifted.

Therefore, the grip portion 22 of the hand operation pipe 22
When the extension pipes 23 and 24 are tilted to the state shown in FIG. 10 by grasping “a”, the connecting pipe 33 can be easily tilted from the state shown in FIG. 2 to the state shown in FIG. In addition, at the time of normal cleaning, even if the connection pipe 33 is turned up and down, the suction port body 30 can be cleaned without lifting (floating) the front side. Further, the connection pipe 33 is connected to the suction port main body 3.
The point of application of the downward force acting on the front wheel 63 and the rear wheel 63
Therefore, the connection pipe 33 can be inclined in a stable state from the state of FIG. 2 to the state of FIG.

On the other hand, when an electric blower (not shown) of the cleaner main body 1 is operated, the suction negative pressure of the electric blower causes the dust collection hose 21, the hand operation pipes 22, the extension pipes 23 and 24, the connection pipe 33 and the cylindrical section 43 to move. Suction chamber 3 of suction port body 30 through
Acts on 9. Air is sucked into the suction chamber 39 from the air introduction port 42 by the suction negative pressure, and the sucked air flow acts on the blade 41b of the rotating cleaning body 41, and the rotating cleaning body 41 is moved in the direction of arrow B in FIGS. Rotate to. Thus, dust is scraped up by the blade 41b of the rotary cleaning body 41 when cleaning a carpet or the like. Then, the scraped-up dust is sucked through the suction port 35b of the suction port body 30, and is guided and collected in a dust collection bag (not shown) in the cleaner body 1.

In this state, when the suction port 30 is moved by grasping the grip portion 22a of the operation pipe 22 at hand, the extension pipes 23, 24 and the connection pipe 33 are rotated around the rotating pipe 32 extending forward and backward (first rotation). Around the axis O1)
Since the extension pipes 23, 24 and the connection pipe 33 rotate around the support shaft 58 (around the second axis O2) orthogonal to the rotary pipe 32, the extension pipes 23, 24 and the connection pipe 33 are connected to the suction port body 30. Can be tilted in any direction with respect to
Cleaning in a narrow place can be easily performed.

Further, as described above, the suction port body 30 can be used for cleaning in a normal use state in which the extension pipes 23, 24 and the connection pipe 33 are directed forward and backward with respect to the suction port main body 31, and can be extended. By rotating the pipes 23 and 24 and the connection pipe 33 around the axes O1 and O2 with respect to the suction port main body 31, the connection pipe 22 is positioned in a plane substantially parallel to the suction port main body 31. Can be used for cleaning in different states. In this way, even when the suction port body 30 is used in two ways, that is, a normal use state and an unusual state, the point of action of the force acting downward from the connection pipe 33 to the suction port body 31 is the same as that of the front wheel 63. When the suction port body 30 is used, the connection pipe 33
Even if a downward force acts on the suction port main body 31 from above, the front side of the suction port main body 31 can be prevented from floating.

Further, connecting the rear wheels 64, 64 to the connecting pipe 3
3, the right and left rear wheels 6 are arranged on the left and right of the rotating pipe 32.
Since the connection pipes 33 do not overlap in the vertical direction, the height of the suction port main body 31 can be reduced.

[0032]

As described above, according to the first aspect of the present invention, there is provided a suction port main body provided with a dust collection suction chamber opened at the bottom surface, and a suction port main body which is communicated with the suction chamber and is connected to the suction port main body. A rotary pipe rotatably mounted around a first axis extending in the front-rear direction, and a rotary pipe connected to the rotary pipe and rotatably connected to the rotary pipe about a second axis orthogonal to the first axis. A connection pipe and a rear wheel attached to a rear portion of the suction port main body are provided, and the rear wheel is located behind the second axis and is a suction port body mounted at a lower portion of the suction port main body. Even if a downward force acts on the rear portion of the suction port main body from the connection pipe during cleaning, it is possible to prevent the front side of the suction port main body from rising from the cleaning surface.

Also, in the invention of claim 2, the rear wheels are provided on the left and right sides of the connection pipe, respectively. Is used for cleaning in two positions in a position that rotates vertically in a plane substantially parallel to the suction port body, the point of action of the force acting downward from the connection pipe to the suction port body is It will always be located between the front and rear wheels. As a result, even when the suction port body is used in two ways, the front side of the suction port main body can be prevented from rising. Moreover, by disposing the rear wheels on the left and right of the connection pipe, the left and right rear wheels and the connection pipe do not overlap in the vertical direction, so that the height of the suction port main body can be reduced.

Furthermore, the invention of claim 3 is an electric vacuum cleaner having the suction port body. Therefore, when an extension pipe or the like is connected to a connection pipe for use, the extension pipe and the connection pipe can be easily connected in any direction. By performing a tilt operation, cleaning in a narrow place can be easily performed.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a main part of a suction port according to the present invention.

FIG. 2 is an explanatory diagram of a state in which a connection pipe of FIG. 1 is erected.

FIG. 3 is an enlarged explanatory view of a main part in a state where the connection pipe of FIG. 1 is not broken.

FIG. 4 is a plan view of the suction port body of FIG. 1;

FIG. 5 is an explanatory view of the suction port body of FIG. 4 as viewed from the rear side.

FIG. 6 is a bottom view of the lower case of the suction port body of FIG. 4;

FIG. 7 is a perspective view of a mounting portion of the connection pipe of FIGS.

FIG. 8 is a sectional view taken along line CC of FIG. 7;

FIG. 9 is an exploded perspective view of the attachment portion of the connection pipe shown in FIG. 7 when disassembled and viewed from another angle.

FIG. 10 is a perspective view of a vacuum cleaner having a suction port having the configuration shown in FIGS. 1 to 9;

FIG. 11 is an explanatory view of a conventional vacuum cleaner.

FIG. 12 is a sectional view of the suction port body of FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 ... Vacuum cleaner main body 21 ... Dust collection hose 22 ... Hand operation pipe 23, 24 ... Extension pipe 30 ... Suction port body 31 ... Suction port main body 32 ... Rotating pipe 33 ... Connection pipe 39 ... Suction chamber 56 ... Seal cylinder 64 ... Rear wheel O1 ... First axis O2 ... Second axis O3 ... Third axis

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kiyoshi Ishikawa 43 Horiyamashita, Hadano-shi, Kanagawa Prefecture Inside the Tec Hatano Plant (72) Inventor Ikuhiro Otsu 43 Horiyamashita, Hadano-shi, Kanagawa Tec Corporation Hadano Plant (72) Inventor Takeyuki Ichino 43 Horiyamashita, Hadano City, Kanagawa Prefecture Tec Hatano Plant

Claims (3)

[Claims] 1. A suction port body provided with a suction chamber for dust collection which is opened on a bottom surface, and is rotatable around a first axis which is communicated with the suction chamber and extends forward and backward with the suction port body. A mounted rotary pipe, a connection pipe connected to the rotary pipe and rotatably connected to the rotary pipe about a second axis orthogonal to the first axis, and mounted on a rear portion of the suction port main body. A rear wheel, wherein the rear wheel is located rearward of the second axis and is attached to a lower portion of the suction port main body. 2. The suction port body according to claim 1, wherein the rear wheels are provided on left and right sides of the connection pipe, respectively. 3. A vacuum cleaner comprising the suction opening according to claim 1.