JPH04156808A - Suction mouthpiece of electric vacuum cleaner - Google Patents

Abstract

PURPOSE:To locate a beating element in a position suitable for the surface to be cleaned, irrespective of how the surface, and beat the surface by furnishing a retaining member having a guide always in contact with the surface during service in such a way as movable in vertical direction relative to the body, and supporting the beating element with this retaining member. CONSTITUTION:When a body 1 is placed on a carpet, a roller 17 to serve as a guide intrudes among fluffs of the carpet, and a beating element 13 projecting downward from the undersurface of the body 1 and held by a retaining member 15 projects alike downward from the undersurface of the body 1. Also, a driver device 22 and a support 18 formed on the retaining member 15 will sink. In this state, a switch 34 and a switch for rotary brush are turned on to cause vibration of the beating element 13 and rotation of rotary brush 10. Now the beating element 13 protrudes downward from the undersurface of the body 1 and vibrates vertically in the condition having intruded among fluffs of the carpet, wherein the center of amplitude of the beating element 13 lies lower than in case with 'tatami' as Japanese carpet, so that good bent out effect is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a suction port body for a vacuum cleaner having a striking body that strikes a surface to be cleaned.

(Prior Art) The present applicant has filed Japanese Patent Application No. 1-120868 regarding the invention of this type of vacuum cleaner suction port body. This suction port body is provided with a striking body that is driven by a drive device such as an electromagnet and strikes the surface to be cleaned at the rear of the suction port formed on the lower surface of the main body. This striking body consists of an elastic shaft and a plurality of rollers rotatably mounted on the elastic shaft, and is stretched over the lower surface of the main body, with both ends fixedly supported by the main body. The drive device includes an iron plate connected to the elastic shaft of the striking body via a connecting member and an electromagnet provided opposite to the iron plate, and is provided in the main body.

Then, by passing a half-wave rectified alternating current through the electromagnet of the drive device, the iron plate is vibrated, and the vibration of the iron plate is transmitted to the elastic shaft via the connecting member. In this way, the striking body vibrates up and down and strikes the surface to be cleaned to knock out dirt from the surface to be cleaned and suck it through the suction port.

(Problem to be Solved by the Invention) In the suction port body of the vacuum cleaner described above, the installation position of the striking body with respect to the bottom surface of the main body is fixed, so the position of the striking body with respect to the surface to be cleaned may vary depending on the type of surface to be cleaned. It has been found that there are cases in which the cleaning target surface is not effectively struck because the cleaning target is not in an optimal position, such as by being placed too high. This is because the striking position, that is, the position of the striking body where striking is most effective, differs depending on the type of surface to be cleaned.

For example, if the position of the tapping body is fixed close to the lower surface of the suction port, when the surface to be cleaned is tatami, the surface of the tatami is the tapping position, and the suction port is placed on the tatami. When placed, the lower surface of the suction port is located between the surface of the tatami mat or very close to it, so the position of the striking body and the striking position of the tatami mat approximately coincide, allowing for effective striking. When used when the surface to be cleaned is a carpet, when the suction port body is placed on the carpet, the beating body will be located above the pile of the carpet, so the beating body will be positioned above the root of the pile. It turns out. However, it is known that it is more effective to tap the carpet to the root of the pile than to hit the top of the pile. Therefore, when the surface to be cleaned is a carpet, the tapping position is the bottom of the suction port body. (Position of the hitting body) It will be in a lower position.

The longer the pile of the carpet, the lower the hitting position will be below the lower surface of the suction body (the position of the hitting body), which may make it impossible to hit the carpet effectively as described above. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to obtain a suction mouth body for a vacuum cleaner, which is capable of tapping a surface to be cleaned by positioning the striking body at a position suitable for the surface to be cleaned, regardless of the type of the surface to be cleaned. It is something to do.

[Structure of the invention]

(Means for Solving the Problem) In order to achieve the above object, the present invention provides a suction port body for a vacuum cleaner according to claim 1, which includes a main body in which a suction port is formed on the lower surface, and a main body provided in the main body. A suction port body of a vacuum cleaner including a drive device and a striking body disposed facing the suction port and driven by the drive device to strike a surface to be cleaned, wherein the suction port body is biased downward by a biasing member. A holder is provided which is movable up and down with respect to the main body and has a guide portion that protrudes downward from the lower surface of the main body and is in constant contact with the surface to be cleaned during use, and the holder supports the striking member. It is.

(Function) In the suction port body of the vacuum cleaner according to claim 1, the guide portion protruding from the lower surface of the suction port body is in constant contact with the surface to be cleaned,
A holder that holds the striking body moves up and down in accordance with the surface to be cleaned, and the striking body is set at a position suitable for the surface to be cleaned. Specifically, for tatami mats, the striking body is set at a position substantially below the suction port body, and for carpets, the striking body is set at a lower position protruding from the bottom surface of the suction port body.

(Example) An example of the present invention will be described based on FIGS. 1 to 5. (2) is the suction port body, and a joint pipe 2 that can freely rotate in the vertical direction is connected to the rear. The main body L has an upper case 3 and a lower case 4.
The upper and lower cases 3 and 4 are connected via a bumper 5, and a suction port 6 communicating with the joint pipe 2 is formed on the lower surface of the lower case 4. The main body l has a front axle 7
．． Rear wheels 8 are provided respectively. And the main body l
An electric motor (not shown) that rotates the rotary brush is housed in the housing. Reference numeral 9 denotes a rotating brush chamber for housing a rotating brush 10 provided facing the suction port 6. The rotation of the electric motor is transmitted to this rotating brush IO via a belt (not shown). An opening 11 is formed in the upper surface of the rotating brush chamber 9 facing the rotating brush 1O, and this opening 11 is connected to a lid 12 that is detachably provided to the main body 1.
It is opened and closed by On the lower surface of the main body 1, a rotating brush 10 is located on the side of the joint pipe 2 from the suction port 6, that is, at the rear of the suction port 6, with a large number of cylindrical beating bodies 13 adjacent to each other.
is placed parallel to. These many striking bodies 13 are provided with elastic shafts 14, such as piano wires, which pass through the centers of the striking bodies 13 in the axial direction. The elastic shaft 14 is held at both ends by a holder 15 in the main body 1.
5 has a roller 17 as a guide section rotatably supported by a shaft 16 below. A support portion 18 is formed on this holding body 15, and is urged downward by a spring 19 as a biasing member so as to normally protrude downward from the lower surface of the main body 1. Specifically, the spring 19 fitted into the boss 20 integrally provided on the support part 18 connects the support body 18 and the boss 21.
The support body 18 is biased downward by a spring 19, and the holding body 15 is biased downward. In addition,
The spring 19 is set to have a larger elastic force than the elastic force of the elastic shaft 14 in the bending direction. The support part 18 has a drive device 2.
2 is provided. This drive device 22 includes a support section 18
It consists of an electromagnet 23 fitted and fixed on the top, an elastic plate 25 fixed to the lower surface of the support 18 with a screw 24, and a magnetic body 26 with one end fixed to the elastic plate 25 and facing below the electromagnet 23. ing. 27 is a guide provided integrally with the upper case 3 to guide the vertical movement of the electromagnet 23;
A stopper 8 is provided on the lower case 4 and restricts downward movement of the support portion 18. 29 is a connecting body, and a magnetic body 26
and the intermediate portion of the elastic shaft 14 are connected to each other. On the other hand, the lower case 4 is provided with a groove 30 in which the striking body 13 is housed at the rear of the suction port 6, and a notch 31 that communicates the groove 30 with the rotary plan chamber 9.

Next, the circuit will be explained. In FIG. 5, a hose 32. A diode 33. is connected between the two poles of the power supplied via an extension tube or the like. Switch 34. Electromagnet 23
are connected in series.

Further, a rotary brush switch 35 provided on the hose 34 and an electric motor 36 are connected in series between the two poles.

The operation will be explained based on the above configuration. Hose 32 on the vacuum cleaner body. The suction port main body l is connected via an extension pipe or the like, and dust and the like are sucked in from the suction port 6 by an electric blower for cleaning. A case where the surface to be cleaned is a tatami mat will be explained. When the suction port main body 1 is placed on a tatami mat, the holder 15 protrudes downward from the bottom surface of the main body 1 as shown in FIG.
The roller 17 contacts the tatami mat, and the holder 15 is pressed by the tatami mat, rises against the biasing force of the spring 19, and sinks into the main body 1.

At this time, the support body 18 provided integrally with the holding body 15
．． The drive 22 also rises. That is, the vertical positions of the striking body 13 and the driving device 22 in the non-driving state are located upward. In this state, turn on the switch 34 and hit the hitting body 13.
vibrate.

When the switch 34 is turned on, the alternating current is half-wave rectified through the diode 33. Therefore, during the positive half cycle, current flows through the electromagnet 23 and magnetic force is generated. Then, the magnetic body 26 is drawn toward the electromagnet 23 side by this magnetic force, the elastic plate 25 is bent, and the elastic shaft 14 is moved toward the connecting body 2.
9 to move upwards. At this time, since the elastic shaft 14 is more easily bent than the spring 19, the vibration of the magnetic body 26 causes the elastic shaft 14 to bend without bending the spring 19. therefore,
The holder 15 remains immersed in the main body 1 while the elastic shaft 1
4 is the one that bends. Then, during the subsequent negative half cycle, no current flows through the electromagnet 23, so no magnetic force is generated.
It bends downward due to the restoring force and inertia of the elastic plate 25 and the elastic shaft 14. By repeating this, the striking body 13 vibrates around the vertical position in the non-driven state, and strikes the tatami mat at the rear of the suction port 6, lifting up dust etc. that have entered the tatami mat and sucking them in through the notch 31. . Since the holding body 15 is recessed into the main body 1 in this manner, a drop in suction force can be prevented without creating an unnecessarily large gap between the lower surface of the main body 1 and the tatami mat. As described above, the striking position of the striking body 13 against the tatami mat, that is, the surface of the tatami mat is struck. Moreover, the hitting body 1
Since the substantially center position of the amplitude where the speed of No. 3 is the largest is substantially coincident with the tatami surface, the tatami can be hit strongly and the knocking effect is improved. Moreover, since the guide is composed of rollers, the suction port body can move smoothly on the floor surface.

Next, the case where the surface to be cleaned is a carpet will be explained. When the main body 1 is placed on a carpet, the main body 1 does not fit between the piles of the carpet because its lower surface area is large.

On the other hand, the roller 17 as a guide part enters between the piles of the carpet and protrudes downward from the lower surface of the main body l, and the holder 15
The striking body 13 held in the body 1 also protrudes downward from the lower surface of the main body 1. Further, the support portion 18° drive device 22 formed on the holder 15 also descends. In this state, both the switch 34 and the rotary brush switch 35 are turned on, and the striking body 13 is turned on.
vibrate and rotate the rotating brush 10. Then, the beating body 13 protrudes downward from the lower surface of the main body 1 and moves up and down while remaining stuck between the piles of the carpet, that is, in a state where the vertical positions of the beating body 13 and the driving device 22 are in the downward position in the non-driving state. It vibrates and hits the carpet.

Therefore, it is possible to hit the carpet with the hitting body 13 up to the root part, which is the hitting position of the hitting body against the carpet, and the center of the amplitude of the hitting body 13 is also lower than when it is used for tatami mats, so that a sufficient knocking effect can be obtained. be able to.

Further, when the surface to be cleaned is between the plates, cleaning is performed without driving either the rotating brush 10 or the striking body 13. At this time, as in the case of the tatami mat, the holder 15 is recessed into the main body 1, so that no more gap than necessary is created between the lower surface of the main body 1 and the tatami mat, and a decrease in suction force can be prevented.

Furthermore, in this embodiment, as described above, since the drive device 22 also moves up and down integrally with the vertical movement of the holder 15, the distance between the electromagnet 23 and the magnetic body 26 is always maintained at a constant distance. A stable driving force can be obtained regardless of the vertical movement of the drum, and furthermore, if the main body 1 is placed on any surface to be cleaned, the center of the amplitude of the striking body 13 can be set in the vicinity of the striking position of the striking body on the surface to be cleaned. Since the ball can be hit with a wide angle, the hitting effect is improved.

〔Effect of the invention〕

As explained above, according to the suction port body of the vacuum cleaner according to the first aspect, a sufficient knocking effect can be obtained on any surface to be cleaned.

[Brief explanation of the drawing]

Figures 1 to 5 are diagrams showing the present invention, in which Figure 1 is a sectional view of the suction mouth body of a vacuum cleaner, Figure 2 is a bottom view of the suction mouth body of the vacuum cleaner, and Figure 3 is a tapping FIG. 4 is a cross-sectional view of the main part of the body in the lowered state, FIG. 4 is a cross-sectional view of the main part of the striking body in the raised state, and FIG. 5 is a circuit diagram. l...--Main body 6--Suction port 13--One hit body 15°"°Holding body 17-Guide portion (roller) 19--Biasing member (spring) 22--Drive device

Claims (1)

[Scope of Claims] 1. A main body with a suction port formed on the lower surface, a drive device provided within the main body, and a surface to be cleaned that is disposed facing the suction port and is driven by the drive device. A suction port body for a vacuum cleaner equipped with a striking body for striking the body, which has a guide part that is urged downward by a biasing member and projects downward from the lower surface of the main body, and is in constant contact with the surface to be cleaned during use. A suction mouth body for a vacuum cleaner, characterized in that a holding body is provided to be movable up and down with respect to the main body, and the striking body is supported by the holding body.