JPH0445174B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a vacuum cleaner nozzle with an agitator.

BACKGROUND ART Conventionally, an agitator 2 of a turbine nozzle 1 of this type has been housed within a main body as shown in FIGS. 6 and 7. That is, a pulley 3 is disposed at one end of the agitator 2, and a belt 5 for transmitting the rotational driving force of the turbine 4 to the agitator 2 is stretched around it, and the agitator 2 is rotatably fixed at both ends. A bearing 6 was installed. The lower body 7 has a shaft centered around the rotating shaft 8 of the turbine 4,
A bearing portion 10 is formed symmetrically by a pair of inclined surfaces 9 that are approximated to circular arcs whose radius is approximately the distance between the rotating shafts of the rotating shaft 8 and the rotating shaft of the agitator 2. 9 and was held so that it could slide up and down at an angle with respect to the floor surface with a stroke of about 4 mm.

In addition, the rotation direction of the agitator 2 is such that the outer peripheral surface of the agitator is upward → forward → downward → backward → upward so that the rotation will scrape up dust from the cleaning surface to the rear of the turbine nozzle 1 and be sucked into the vacuum cleaner body. It was configured to be.

Problems to be Solved by the Invention However, since the angle between the belt 5 stretched over the rotating shaft 8 below the pulley 3 and the inclined surface 9 is an acute angle, the rotation of the turbine 4 is controlled by the belt 5.
When the power is transmitted and the agitator 2 is rotated,
A component of the tension of the belt 5 acts upward along the inclined surface 9. Therefore, the end of the agitator 2 on the side where the belt 5 is stretched can more easily slide upward along the inclined surface 9 with a light force than the end of the agitator 2 on the opposite side. As a result, when the agitator 2 is actually rotated on the carpet, the repulsive force from contact with the carpet causes the end of the agitator 2 on the side where the belt 5 is stretched to be in light contact with the carpet surface, and the opposite side Compared to the end of the agitator 2, the ability to scrape up lint and hair adhering to the carpet surface, as well as dust that has entered the carpet fiber roots, is lower, and the dust collection performance is not constant in the width direction of the agitator 2. There was a problem. In particular, this issue is
In the agitator using the sliding contact piece described in Publication No. 161334, this was more noticeable because the sliding contact piece was continuous, and the dust collection capacity was reduced by about half of the belt tension side in the width direction of the agitator. .

The present invention solves this problem and provides a nozzle that exhibits almost constant dust collection performance in the width direction of the agitator.

Means for Solving the Problems The technical means of the present invention to achieve the above object includes an agitator, a drive source that rotationally drives the agitator, a belt that transmits the rotation of the drive source to the agitator, and a belt that connects both ends of the agitator. The nozzle body is formed in the shape of a circular arc whose radius is approximately the distance between the axis of rotation of the drive source and the axis of rotation of the agitator. , a bearing holding part that holds the bearing slidably in the vertical direction, and the sliding stroke of the bearing on the belt tensioning side at the bearing holding part is limited to be smaller than that on the side opposite to the belt tensioning, or The load on the upward movement of the bearing is greater than that on the side opposite the belt.

Effect When the agitator touches the ground in a rotating state with the above means, the agitator on the belt tension side is stopped from rising from the carpet surface, and the grounding force is almost the same as that of the end of the agitator on the side opposite to the belt tension. acts on the end of the agitator on the side where the belt is stretched, resulting in a nearly constant ground contact force in the width direction of the agitator, resulting in a nearly constant dust collection ability.

Example Examples thereof will be described below with reference to the drawings.

In Figures 1 to 4, 21 is a nozzle body that is connected to the vacuum cleaner body via a hose/extension pipe, and has an agitator chamber 23 containing an agitator 22 in the front and a turbine 24 in the rear. It has a turbine chamber 28 consisting of an upper body 25, a lower body 26, and a connecting pipe 27. The connecting pipe 27 is connected to the upper body 2
5 and the lower body 26 so as to be rotatable within a certain range. 29 is a connecting ring 30 to the connecting pipe 27
A connecting pipe rotatably connected to the hose or extension pipe via the connecting pipe. A front lid 31 is removably connected to the upper body 25 and the lower body 26 by means of a pair of buckles 32, and covers the agitator chamber 23 from above. 33 is a bearing pipe that rotatably holds the turbine shaft 34 holding the turbine 24; 35 is a pulley 36 attached to the end of the turbine shaft 34 opposite to the turbine 24 and to both ends of the agitator 22; This is a belt stretched around a pulley 36 on the shaft 34 side. 37 is the upper body 25
It is a switching lever that integrally includes an operating knob 38 that protrudes upward and a shielding plate 40 that opens and closes a main passage 39 that communicates the turbine chamber 28 and the agitator chamber 23, and the knob 38 is located on the turbine chamber 28 side. When the shielding plate 40 closes the main passage 39, and when the knob 38 is positioned on the end side of the turbine nozzle 21, as the switching lever 37 slides,
The shield plate 40 slides toward the end to open the main passageway 39. Reference numeral 41 denotes a sub-passage formed in front of the turbine 24, which constantly communicates the turbine chamber 28 and the agitator chamber 23, and is formed by the upper main body 25 and the lower main body 26.

The agitator 22 has a holder 42 made of low foam resin, and the holder 42 is inserted and inserted facing each other.
It is formed from two fitted sliding contact pieces 43, two toothed pulleys 36 for belt tensioning fixed to both ends of the holder 42, and a holder shaft 44 press-fitted to both ends of the holder 42. , is rotatably fixed by a pair of bearings 45 inserted into the holder shaft, and is slidably held by a bearing holding portion 46 of the lower body 26. The bearing part 46 is composed of a pair of inclined surfaces 47 approximated by an arc whose radius is the distance between the center centers of the turbine shaft 28 and the holder shaft, with the turbine shaft 28 as the center.
A pair of suction ports 48 are formed at both lateral ends of the suction port 48 provided below.

A spring 49 is fixed above the bearing 45 on the belt 35 tension side of the front cover 31, and applies a downward pushing force to the bearing 45. The agitator 22 has bearings 45 at both ends extending approximately
It can slide with a stroke of mm, and both ends can slide up and down independently.

Next, the operation and effects of the above configuration will be explained.

When cleaning tatami mats or hard floors, the switching lever 37 is moved toward the end of the turbine nozzle 21. At this time, the shielding plate 40 opens the main passage 39,
Since the flow velocity of the suction air passing through the sub passage 41 becomes low, the rotation of the turbine 24 is stopped.
Use the agitator 22 with it stopped.

On the other hand, when cleaning the toilet, the knob 38 is positioned on the turbine chamber 28 side and the shielding plate 40 is used to clean the main passage 3.
9 is closed, and the suction air is passed through the suction port 48 → sub passage 41 →
Turbine chamber 28 → communication pipe 29 → hose/extension pipe →
Let it flow through the path of the vacuum cleaner body. The airflow that has entered the turbine chamber 28 is throttled by the sub passage 41 and collides with the turbine 24 at high speed, causing it to rotate. This rotation is transmitted by the belt 35, and the agitator 22 rotates in the upward direction, the forward direction, the downward direction, the backward direction, and the upward direction, removing dust at the root of the carpet fibers and fibrous dust such as lint and hair attached to the surface. , scraping up with a sliding contact piece 43 and cleaning the floor efficiently and easily.

At this time, the agitator 22 has an inclined surface 4 at the end of the belt 35 on the tension side as a component of the tension of the belt 35.
7, the tip of the sliding contact piece 43 tries to lift up on the carpet surface, but the spring elastic force of the spring 49 fixed to the front cover 31 acts downward and cancels it out, and the agitator The ground contact force at both ends of 22 is approximately constant. As a result, the dust collection performance for the carpet becomes almost constant in the width direction of the agitator 22, and a desirable dust collection result can be obtained.

Next, an embodiment according to the second means will be described with reference to the drawings. Note that the same parts as in the embodiment according to the first means are indicated by the same numbers, and explanations thereof will be omitted.

In FIG. 5, 51 is the belt 35 of the front lid 31.
A rib formed on the tension side end limits the sliding stroke of the belt 35 along the inclined surface 47 of the bearing 45 on the tension side to about 2 mm.

With the above configuration, the knob 38 can be connected to the turbine chamber 28.
Close the main passage 39 with a shielding plate 40 located on the side,
In the state where the turbine 24 is rotated and the belt 35 transmits the information to the agitator 22 to rotate it, the agitator 22 is connected to the belt 35.
An upward force acts along the inclined surface 47 at the tension side end of the belt 35 as a component of the tension, and the sliding contact piece 43
The tip of the belt 35 tries to rise to the surface of the carpet, but the rib 51 formed on the front lid 31
Bearing 4 attached to the end of the agitator 22 on the tension side
Since the upward sliding movement along the inclined surface 47 of the agitator 22 is limited to approximately 2 mm, the ground contact force at both ends of the agitator 22 is almost constant, and the dust collection performance against the carpet is reduced by the axis of the agitator 22. It is almost constant in the direction.

Note that in the first means described above, the spring 49
Since the sliding movement is controlled by the agitator, the sliding stroke itself can be maintained at approximately the same amount at both ends of the agitator, and therefore, the rotation of the agitator 22 does not stop when sucking large particle type dust, as in the conventional case.

On the other hand, in the second means, a rib 51 is provided on the front lid 31.
Because it is only necessary to provide a Further, the driving source of the agitator is not limited to a turbine, but may be an electric motor.

Effects of the Invention As explained above, the present invention limits the sliding stroke of the bearing on the belt tensioning side to be smaller than that on the side opposite to the belt tensioning in an agitator in which the bearing of the agitator is held in a vertically slidable manner by the bearing holding part. Alternatively, by making the load on the upward movement of the bearing larger than that on the opposite side of the belt, it is possible to obtain dust collection performance that is almost uniform in the width direction of the agitator in the carpet cleaning state.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing the first embodiment of the present invention, Fig. 2 is a transverse sectional view with the front cover and upper body removed, and Fig. 3 is a Z-Z cross section in Fig. 2. Similarly, FIG. 4 is a perspective view of the entire nozzle, FIG. 5 is a longitudinal sectional view showing an embodiment according to the second means, and FIG.
The figure is a cross-sectional view of a conventional turbine nozzle with the front cover and upper body removed, and FIG. 7 is a perspective view of the turbine nozzle in the conventional example with the front cover removed. 21... Nozzle body, 22... Agitator,
24... Drive source (turbine), 35... Belt,
45...bearing, 46...bearing holding part, 49...spring, 51...rib.

Claims (1)

[Scope of Claims] 1: an agitator, a drive source that rotationally drives the agitator, a belt that transmits the rotation of the drive source to the agitator, and bearings that are attached to both ends of the agitator and rotatably support the agitator; A bearing holding part that is formed in the nozzle body in a shape approximating a circular arc centered on the rotational axis of the drive source and whose radius is approximately the distance between the rotational axis and the agitator rotational axis, and holds the bearing so as to be slidable in the vertical direction. A vacuum cleaner nozzle, comprising: a vacuum cleaner nozzle in which the load on the upward movement of the bearing on the side where the belt is stretched is greater than that on the side opposite to the belt. 2. The vacuum cleaner nozzle according to claim 1, wherein a spring is used as the load on the belt tension side. 3. An agitator, a drive source that rotationally drives this agitator, a belt that transmits the rotation of the drive source to the agitator, a bearing that is attached to both ends of the agitator and supports it rotatably, and a rotating shaft of the drive source. a bearing holding portion formed in the nozzle body in a shape approximating an arc having a center and a radius approximately equal to the distance between the axes of the rotary shaft and the agitator rotating shaft, and holding the bearing slidably in the vertical direction; A nozzle for a vacuum cleaner in which the sliding stroke of the bearing on the side where the belt is stretched is restricted to be smaller than that on the side opposite to the belt. 4. Claim 3, wherein a rib is formed downward from the upper inner surface of the nozzle body as a means for limiting the sliding stroke.
The vacuum cleaner nozzle listed.