JPS644768B2 - - Google Patents

Description

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

For suction ports that are equipped with brushes that are connected to a rotary drive unit such as a turbine that is rotated by a motor or suction airflow, do not use the brush to avoid scratching the floor when cleaning hard floors other than carpets. Measures include shortening the bristles or softening the bristles of the brush. If the brush bristles are short,
Short-pile carpets are less likely to come into contact with the brush,
Brush bristles with soft bristles have a weak ability to dislodge dust attached to the carpet. Further, even when cleaning floors other than carpets, the brush comes into contact with the floor, causing the problem that dirt gets entangled in the brush.

In addition, there are devices that stop the turbine and brushes by limiting the flow velocity of the suction airflow that hits the turbine or by diverting the suction airflow from the turbine, but they cannot be completely stopped and the operation is unstable. It is.

The object of the present invention is to provide a suction port body for a vacuum cleaner that can reliably switch between driving and stopping brushing depending on the application.

This invention enables and disconnects the connection between the brush and the rotary drive part by changing the position of the brush with respect to the rotary drive part by the actuation mechanism, regardless of the operation of the rotary drive part, and also connects the brush to the floor surface by the actuation mechanism. By selectively positioning the brush in the upper position and the raised position, the brush can be connected to the floor surface and driven by the rotary drive unit, or by raising the brush and reducing the distance between the shafts with the rotary drive unit. Clean floors other than carpets by loosening the belt to ensure that the brush stops, and by providing a shutter that shuts off the brush from the suction airflow in conjunction with the operation of the actuating mechanism when raising the brush. By providing an operating mechanism that reliably prevents dust from getting entangled in the brush, and positioning the brush in the front or rear position, the brush is moved forward and the belt is tightened to connect it to the rotary drive unit. Alternatively, the brush can be brought to the rear to reliably disconnect from the rotary drive unit, and furthermore, a valve body can be provided to widen the opening amount of the ventilation hole in conjunction with the operation of the operating mechanism when the brush is moved upward or backward. As a result, the velocity of the intake airflow is drastically reduced, and the rotation of the turbine serving as the rotational drive unit is reduced, thereby reducing the friction of the belt and reducing the intake noise.

An embodiment of the invention described in the first, second, and fourth claims is shown in FIGS. 1 to 6.
This will be explained based on the diagram. Reference numeral 1 denotes a main case in which an upper case 2 and a lower case 3 are assembled with a connecting pipe 4 rotatably sandwiched therebetween and a bumper 5 held therebetween. Although the connecting pipe 4 is not shown, it is connected to the dust collecting section of the vacuum cleaner by an extension pipe or a suction hose. If the inside of the main body case 1 is shown with the upper case 2 removed as shown in FIG. 2, there is a brush chamber 7 that stores the horizontally long brush 6.
A ventilation passage 9 for housing a turbine 8 serving as a rotational drive unit is formed and partitioned by partition walls 10 and 11. As shown in FIG. 3, a horizontally elongated suction opening 12 is formed in the lower surface of the brush chamber 7.

In addition, ventilation holes 13 and 1 that are continuous with each other are provided in the central part of the partition wall 10 between the upper case 2 and the lower case 3.
4 is formed, and a baffle plate 15 is formed at the upper edge of the ventilation hole 13 of the upper case 2 to guide the suction airflow in the tangential direction of the turbine 8.

Therefore, the brush 6 is attached to the main body case 1.
An actuation mechanism 16 is provided for selectively positioning the device in a floor mating position and a raised position. That is, on both sides of the main body case 1, an arm 18 as a holder is attached to be vertically movable and has a bearing portion 17 at its tip for rotatably holding both end shafts of the brush 6. A connecting rod 19 is rotatably held in the partition wall 11 between the upper case 2 and the lower case 3, and legs 20 bent at both ends of the connecting rod 19 are connected to the rear part of the arm 18. . Further, a crank 21 is formed on the connecting rod 19 and extends upward. Furthermore, the knob 22 held in the upper case 2 so as to be freely movable back and forth has locking grooves 23 and 2 that engage with the crank 21 and position the crank 21 in an upper position and a lower position.
4 is formed.

Next, the front wall of the brush chamber 7 and the partition wall 10
A pair of front and rear horizontally elongated shutters 25 are supported so as to be vertically movable. From the center of rotation at both ends of these shutters 25, the operating mechanism 16
An arm 27 connected to a pin 26 protruding inward from the bearing portion 17 is integrally formed.

The turbine 8 and the brush 6 are connected to a belt 28
are connected by. This belt 28 is inserted into a notch hole 29 formed in the partition wall 10.

In this configuration, when cleaning a carpet, the knob 22 is pulled rearward and brought into contact with the brush 6 on the floor, as shown in FIGS. 3 and 5. In this state, most of the ventilation holes 14 are closed by the shutters 25, and therefore, the intake airflow is guided to the baffle plate 15 and sucked in through the small opening between the upper part of the ventilation holes 14 and the ventilation holes 13. This causes the turbine 8 to rotate at high speed and the brush 6 to rotate. When cleaning hard floors other than carpets, slide the knob 22 forward. As a result, the crank 21 is pushed and engaged with the locking groove 24, the connecting rod 19 is rotated downward as shown by the imaginary line in FIG. 5, and the arm 18 is rotated clockwise. The brush 6 is therefore in the raised position. At this position, the distance between the shafts and the turbine 8 is shortened, the belt 28 becomes slack, and power transmission can be reliably interrupted. Further, as the bearing portion 17 rises, the shutter 25 rotates in a direction to block the brush 6 from the suction path as shown in FIG. 4, and the ventilation hole 14 is opened. As a result, the suction airflow is diffused and sucked in through the ventilation hole 14 whose opening diameter is widened, and the intake noise is low and the rotational speed of the turbine 8 is also reduced. As a result, the belt 28
Friction is also reduced and lifespan can be increased.
Further, since the suction path is blocked from the brush 6, there is no possibility of dust getting tangled. In this way, when cleaning floors other than carpets, the brush 6 is moved away from the floor surface, so
There is no risk of damaging the floor. Therefore, the bristles of the brush 6 can be made hard and long to effectively clean the carpet.

Next, an embodiment of the invention described in the first and fifth claims is shown in FIGS. 7 and 8. Components that are the same as those in the embodiment described above are designated by the same reference numerals, and description thereof will be omitted (the same applies hereinafter). In this embodiment, instead of the shutter 25, a plate-shaped valve body 30 facing the ventilation holes 13 and 14 is slidably provided in the ventilation passage 9, and the knob 22 of the operating mechanism 16 is lengthened so that the knob 22 can be extended. A pin 31 and an inclined groove 32 that engage with each other are provided on one side of the valve body 30. A notch 33 is formed in the lower part of one side of the valve body 30 . This notch 33 is for blowing suction airflow against the turbine 8 when the ventilation hole 14 is throttled by the valve body 30.

Therefore, in order to clean floors other than carpets, the brush 6 is raised by sliding the knob 22 forward, but the valve body 30 automatically slides due to the engagement of the pin 31 and the inclined groove 32, thereby preventing ventilation. The opening amount of the hole 14 is widened. As a result, the rotational speed of the turbine 8 is drastically reduced, and on the other hand, the belt 28 is loosened. Intake noise is also reduced.

Furthermore, the first claim of this invention,
An embodiment of the third invention is shown in FIGS. 9 to 12.
This will be explained based on the diagram. The main body case 1 includes an actuation mechanism 34 for selectively positioning the brush 6 in the front-back direction.
is provided. The operating mechanism 34 includes a slide plate 35 as a holder provided on both sides of the main body case 1 so as to be slidable in the front and back direction, a connecting rod 19, and a knob 22. A bearing portion 36 that rotatably holds both end shafts of the brush 6 is formed at the tip of the slide plate 35, and an inclined groove 37 that slopes rearwardly upward is formed at the rear portion of the slide plate 35. The leg 20 of the connecting rod 19 is formed with a bent portion 38 that bends outward and engages the inclined groove 37.

Therefore, in the state shown in FIGS. 10 and 11, the brush 6 is located at the front, and tension is applied to the belt 28. That is, the turbine 8 is rotated by the suction airflow from the ventilation hole 14, and the brush 6 is driven. In order to clean the floor other than the carpet, when the knob 22 is pushed forward from this state, the connecting rod 19 rotates downward and draws the slide plate 35 backward. Therefore, it is possible to loosen the belt 28 and reliably cut off power transmission to the brush 6.

In this case, the knob 22 and valve body 3 shown in FIG.
0 is provided, and by pushing the knob 22 forward, the valve body 30 is slid to widen the opening amount of the ventilation hole 14, thereby reducing the flow rate of the suction airflow when cleaning floors other than carpets. good.

As described above, this invention enables the connection between the brush and the rotary drive section to be disconnected by changing the position of the brush with respect to the rotation drive section using the actuating mechanism, regardless of the operation of the rotation drive section. By selectively positioning the brush between the floor contact position and the raised position using the actuating mechanism, the brush can be connected to the floor and driven by the rotary drive unit, or the brush can be raised and the distance between the shafts with the rotary drive unit can be adjusted. By making the brush smaller, the belt can be loosened and the brush can be stopped reliably.Furthermore, by providing a shutter that shuts off the brush from the suction airflow in conjunction with the operation of the actuating mechanism when raising the brush. , it is possible to reliably prevent dust from getting entangled in the brush when cleaning floors other than carpets, and by providing an operating mechanism that positions the brush in the front or rear position, the brush can be moved forward. The belt can be tightened to connect to the rotary drive unit, or the brush can be moved backwards to reliably disconnect from the rotary drive unit, and is also linked to the operation of the actuating mechanism when the brush is raised or moved backwards. By providing a valve body that widens the opening of the ventilation hole, it is possible to drastically reduce the flow velocity of the intake airflow, reduce the rotation of the turbine as a rotational drive unit, reduce belt friction, and reduce intake noise. It is effective.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a first embodiment of the present invention, Fig. 2 is a plan view of the lower case thereof, and Figs. 3 and 4 are enlarged longitudinal sections taken along line A-A in Fig. 2. Side view, Figure 5 is B- in Figure 2.
6 is an exploded perspective view of the operating mechanism, FIG. 7 is a plan view of the lower case showing the second embodiment of the present invention, and FIG. 8 is the knob and valve. FIG. 9 is a plan view of the lower case showing a third embodiment of the present invention; FIG. 10 is an enlarged longitudinal sectional side view taken along line C--C in FIG. 9; The figure is an enlarged longitudinal sectional side view taken along line D--D in FIG. 9, and FIG. 12 is an exploded perspective view of the operating mechanism. 1... Main body case, 6... Brush, 7... Brush chamber,
8... Rotation drive unit, 9... Ventilation path, 13-14... Ventilation hole, 16... Operating mechanism, 18... Holder, 19... Rod, 22... Knob, 25... Shutter, 28... Belt, 30... Valve body, 34 ...Operating mechanism, 35... Holding body.

Claims (1)

[Scope of Claims] 1. A brush chamber with an opening at the bottom in which a horizontally long brush is housed in a main body case that runs on the floor, and a ventilation path connected to a dust collection section maintained in a negative pressure state, with ventilation provided between the two. A rotary drive unit is provided in the main body case, which is formed in communication with a hole and is connected to the brush via a belt, and includes a manually moved knob, a rod connected to the knob, and a rotary drive unit connected to the brush. a first position in which the brush and the rotary drive unit are connected in a power transmission state by the belt; A suction mouth body for a vacuum cleaner, characterized in that the suction mouth body of a vacuum cleaner is selectively positioned by the actuating mechanism at a second position having an axis-to-axis distance shorter than an axis-to-axis distance from the driving part. 2. The floor surface contact position where the distance between the axes of the brush and the rotary drive unit connected by a belt is large is defined as the first position, and the raised position where the distance between the axes between the brush and the rotary drive unit is small is defined as the second position. A suction port body for a vacuum cleaner according to claim 1, characterized in that: 3. The first position is a front position where the distance between the shafts of the brush and the rotary drive part is large and the brush and the rotary drive part are connected by a belt, and the rear position where the distance between the shafts with the rotary drive part is small. The suction port body for a vacuum cleaner according to claim 1, characterized in that the second position is the second position. 4 A brush chamber with an opening at the bottom that stores a horizontally long brush in a main body case that runs on the floor and a ventilation passage connected to a dust collection section maintained in a negative pressure state are formed by communicating through ventilation holes between the two. A rotary drive unit connected to the brush via a belt is provided in the main body case, and includes a manually moved knob, a rod coupled to the knob, and a rod coupled to the rod to hold the shaft of the brush. An operating mechanism is provided that includes a holding body and a shutter that opens and closes the ventilation hole in conjunction with the vertical movement of the brush, and the brush and the rotary drive unit connected by the belt are placed on a floor surface with a large distance between their axes. A suction mouth body for a vacuum cleaner, characterized in that the suction mouth body of a vacuum cleaner is selectively positioned by the actuating mechanism at an alignment position and a raised position where the distance between the axes of the brush and the rotary drive unit is small. 5 A brush chamber with an opening at the bottom that stores a horizontally long brush in a main body case that runs on the floor and a ventilation passage connected to a dust collection section maintained in a negative pressure state are formed by communicating through ventilation holes between the two. A rotary drive unit connected to the brush via a belt is provided in the main body case, and includes a manually moved knob, a rod coupled to the knob, and a rod coupled to the rod to hold the shaft of the brush. An operating mechanism including a holding body is provided, a valve body for changing the opening amount of the ventilation hole is slidably provided in the main body case, and the brush and the rotational drive unit are connected in a power transmission state by the belt. The actuating mechanism selectively positions the brush at a first position and a second position having an axis distance shorter than an axis distance between the brush and the rotary drive unit at the first position. A suction port body for a vacuum cleaner, characterized in that an operating mechanism is used to move the brush in a direction to a first position to widen the amount of opening of a ventilation hole by the valve body.