JP2520748B2 - Vacuum cleaner suction body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a suction port body of an electric vacuum cleaner used for cleaning a floor or the like, and in particular releases dust from a surface to be cleaned. The present invention relates to a suction port body of an electric vacuum cleaner using a hitting body.

(Prior Art) Conventionally, as a suction port body of an electric vacuum cleaner having a striking body for releasing dust from a surface to be cleaned, particularly a fold, a suction port body shown in FIG. 6 is known, for example.

The suction port body constitutes an outer wall by combining an upper case 2 and a lower case 3 each having an opening / closing lid as the suction port body 1. On the outside of the bottom surface of the suction port body 1, a pair of front and rear wheels including a small wheel 4a provided at the front and a large wheel 4b provided at the rear are provided on the left and right.

Further, the suction port body 1 is divided into a front suction chamber 6 and a rear drive device chamber 7 by a partition wall 5.

The suction chamber 6 has a suction port 8 opened downward,
A rotating brush 9 is provided inside. Further, a sealing material 10 is fixed to the lower case 3 at a position in front of the large wheel 4b, and a vibrating beater 11 is provided in front of the sealing material 10 substantially parallel to the rotation axis of the rotary brush 9. It is arranged. As shown in FIG. 7, the vibrating beater 11 has a plurality of cylindrical vibrating rollers 12 arranged in the axial direction with almost no gaps, and the shafts of these vibrating rollers 12 penetrating through the lower case 3 at both ends. It is formed of a spindle 13 such as a piano wire fixed to the. Also, this vibrating beater 11
It is provided in a recess 14 provided on the lower surface of the lower case 3 along the rear surface of the partition wall 5.

 Next, driving means for the vibrating beater 11 will be described.

An electromagnet 15 as a drive source is fixed to the drive device chamber 7, and a rear end portion of a support plate 16 made of an elastic body is fixed to the lower case 3 with a screw 17 behind the electromagnet 15. The rear end of the diaphragm 18, which is made of a magnetic material such as an iron plate, is fixed to the front end of the support plate 16, which is the free end side, in the vicinity of the iron core of the electromagnet 15. Further, a connecting body 19 is fixed to the front end portion of the vibrating plate 18, and the front portion of the connecting body 19 passes through a through hole formed in the upper portion of the recess 14 and is an intermediate portion of the support shaft 13 of the vibrating beater 11. Connected to the part.

Next, a state in which the vibration beater 11 is driven will be described.

When a current flows through the electromagnet 15 to generate a magnetic force, the magnetic force pulls the vibrating plate 18 toward the electromagnet 15 side, the support plate 16 elastically bends in the direction of the electromagnet 15, and the coupling body 19 moves upward. The vibrating beater 11 provided on the support shaft 13 moves as shown by the upwardly curved chain line in FIG.

Then, when the current stops flowing, the magnetic force disappears and the restoring force of the support plate 16 and the support shaft 13 causes each member to return to the inoperative state, that is, the original position, but due to the mass of the vibrating plate 18 and the vibrating roller 12, etc. Due to the inertial force, bending is generated downward as shown by the chain line on the lower side of FIG.

By repeating this, the vibrating roller 12 vibrates in the vertical direction.

Then, the vibrating roller 12 of the vibrating beater 11 driven in this way taps the fold and sucks the released dust, whereby the cleaning is performed.

On the other hand, the vibrating beater 11 is held on the bottom surface of the suction port main body 1 in the non-driving state and is provided at the rear of the sealing material.
10 prevents air from flowing out and maintains the vacuum degree of the suction chamber 6.

(Problems to be Solved by the Invention) As described above, as the conventional suction port body, the tapping body, that is, the vibrating beater hits the surface to be cleaned in a state where the middle portion of the vibrating beater is bent downward, so that both ends of the vibrating beater are hit. It was not possible to do so, and it was necessary to repeatedly perform cleaning at different positions in order to reliably knock out dust. Along with this, since the vibrating beater hits the surface to be cleaned in a state where the vibrating beater is bent downward, that is, when the speed is reduced, there is a problem that it is not possible to hit with a strong force and it is inefficient to knock out dust.

SUMMARY OF THE INVENTION The present invention is intended to solve the above-described problems, and can increase the range of hitting by a hitting body and strongly hit the surface to be cleaned to ensure that dust is released efficiently and effectively from the carpet or fold. It is intended to provide a suction port body of a machine.

It is also an object of the present invention to provide a suction port body for an electric vacuum cleaner that does not require a sealing material by reliably blocking the flow of air without driving the hitting body and acting as a sealing material. is there.

[Structure of Invention]

(Means for Solving the Problem) In order to solve the above-mentioned problems, the suction port body of the electric vacuum cleaner according to the first aspect of the present invention includes a connection pipe communicating with a dust collecting chamber of the vacuum cleaner body, and A suction port main body having at least a pair of wheels whose lower end outer periphery projects downward from the bottom face and which forms a suction port communicating with the connection pipe and opening downward, and the suction port located between the pair of wheels. An elastic shaft that is provided along the mouth and has both ends fixed to the suction port main body, and a lower end outer circumference that is provided on the elastic shaft between the both end parts and that is located substantially on the plane connecting the lower end outer circumferences of the pair of wheels. And a drive source that periodically bends the elastic shaft upward.

In the second aspect of the present invention, the bottom surface of the suction port body is provided with a recess facing the hitting body and serving as a working space for the driving operation of the hitting body, and at least a part of which is in proximity to the upper outer periphery of the hitting body. It is a thing.

(Operation) In the suction port body of the electric vacuum cleaner according to claim 1, the drive source periodically bends the elastic shaft upward, whereby the elastic shaft repeats a natural state and an upwardly bent state. The hitting body provided on the elastic shaft knocks out dust from the surface to be cleaned. Since the outer periphery of the hitting body is provided so as to be located substantially on the surface connecting the outer circumferences of the pair of wheels, the hitting body can strongly hit the surface to be cleaned over a wide range between both ends of the elastic shaft. Thus, the dust released from the surface to be cleaned is guided from the suction port to the cleaner body through the connecting pipe.

In the suction port body of the electric vacuum cleaner according to claim 2, since the upper outer periphery of the hitting body and a part of the recessed portion on the bottom surface of the suction port body are close to each other, the suction port body of the suction port body is not driven. The space formed between the bottom surface and the surface to be cleaned is cut off between the space of the suction port and the space behind it to prevent the hitting body from lowering the vacuum level of the suction port.

(Example) Hereinafter, the structure of the suction inlet of the electric vacuum cleaner of the present invention will be described with reference to FIGS. 1 and 2. Reference numeral 20 is a suction port main body, and a lower case 21 and an upper case 22 having an opening / closing lid 22a are combined to form an outer wall. A partition chamber 23, 24, 25 defines a suction chamber 26 on the front side of the suction port body 20, and a drive unit chamber 27, an air duct chamber 28, and an electric motor chamber 29 are sequentially arranged on the rear side on the left and right sides. It is divided and formed side by side in the direction.

The suction chamber 26 and the air passage chamber 28 communicate with each other through a communication port 30 formed in the partition wall 23 extending in the left-right direction.

Further, a main suction port 31 is formed on the bottom surface of the suction port main body 20 facing the suction chamber 26, and auxiliary suction ports 32, 33 are located on both left and right sides of the main suction port 31. Each is formed with an opening.

Further, on the bottom surface of the suction port main body 20, a pair of left and right small diameter front wheels 34 having a lower end outer periphery protruding downward are pivotally attached to the front edge portion, and a lower end outer periphery has a pair of left and right large diameter protruding downward. A rear wheel 35 is pivotally attached to the rear edge.

Further, at the center of the rear portion of the suction port body 20, a first connecting pipe 36 that forms a rear air passage from the inside of the air passage chamber 28,
It is connected so that it can move up and down. That is, the rotating shafts 37 formed on both sides of the front portion of the first connecting pipe 36 are the same as the air duct chamber.
Upper and lower case 2 at partition walls 24 and 25 on both sides of 28
It is rotatably clamped by 1,22.

A bent front portion of the second connecting pipe 38 is connected to the rear portion of the first connecting pipe 36 so as to be rotatable in the circumferential direction.

The connecting pipes 36, 38 are prevented from coming off by a connecting ring 39.

An extension pipe connected to a cleaner body (not shown) via a hose is detachably fitted and connected to the rear portion of the second connection pipe 38. The extension pipe is connected to the connection pipes 36, 38 and the hose. The air passage chamber 28 and the dust collecting chamber of the cleaner body are communicated with each other via the.

A rotary brush 40 is rotatably supported in the suction chamber 26 so as to face the main suction port 31 with the horizontal direction in FIG. 2 as a rotation axis. That is, the rotary shafts 41 fixed to the left and right ends of the rotary brush 40 are rotatably supported by bearings 42, and the bearings 42 are supported by the suction port body 20.

Further, each of the rotary shafts 41 is located outside the bearing 42.
The auxiliary rotary brush 43, which faces the auxiliary suction ports 32, 33.
44 are fixed respectively. Further, it is located between the bearing 42 on one side and the auxiliary rotary brush 44, and the pulley 45 is attached to the rotary shaft 41.
Has been fixed. The rotary brushes 40, 43, 44 have a plurality of brush bristles 46, 47, 48 planted on the outer peripheral surface thereof.

Further, an electric motor 49 is arranged in the electric motor chamber 29 as a drive source for rotationally driving the rotary brushes 40, 43, 44. A belt 52 for transmission of rotation is wound around a pulley 51 fixed to an output rotary shaft 50 of the electric motor 49 and a pulley 45 of the rotary brushes 40, 43, 44.

Further, on the bottom surface of the suction port body 20, at a position behind the suction chamber 26 and in front of the rear wheel 35, a vibrating beater 53 is provided substantially parallel to the rotary shaft 41 of the rotary brushes 40, 43, 44. Has been.

These points will be particularly described with reference to FIGS. 3 and 4.

The vibrating beater 53 includes a plurality of cylindrical vibrating rollers 54 as striking bodies which are arranged in the axial direction of the vibrating beater 53 with a slight interval and are rotatably mounted, and the centers of these vibrating rollers 54 in the axial direction. Support shaft 55 as an elastic shaft penetrating to
And two fixing bodies 56 for fixing both ends of the support shaft 55 to the lower case 21. The lower end outer circumference of the vibrating roller 54 is disposed so as to be located on a substantially plane connecting the lower end outer circumferences of the front and rear wheels 34, 35.

The support shaft 55 is made of a cylindrical elastic body such as a piano wire.

On the other hand, the bottom surface of the lower case 21 is formed with a recess 57 extending in the left-right direction along the partition wall 23 on the rear side of the suction chamber 26.

A plurality of notches 58 communicating with the suction port 31 are formed in the lower part of the front surface of the recess 57. The recess 57 serves as an operation space for the vibrating beater 53.

Further, the fixed bodies 56 at both ends of the support shaft 55 are located at both ends of the recess 57, and the locking claws 59 formed on the lower case 21.
It is locked by.

Since the concave portion 57 and the vibrating roller 54 are extremely close to each other, air is prevented from flowing into the suction port 31 from the rear.

In the non-driving state, the outer periphery of the lower end of the vibrating roller 54 projects downward from the concave portion 57 and substantially contacts the surface to be cleaned.

Further, an electromagnet 60 is arranged as a drive source for driving the vibrating beater 53 at a position opposite to the drive device chamber 27, that is, the electric motor 49 and the air passage chamber 28. In the drive device chamber 27, the rear end portion of the support plate 61 made of an elastic body is fixed to the lower case 21 by screws. And
The rear end of the vibrating plate 62 made of a magnetic material such as an iron plate is fixed to the front end on the free end side of the support plate 61, which is positioned close to the lower side of the electromagnet 60. A connecting body 63 is fixed to the front end of the diaphragm 62.
The front part of the penetrating through the slit-shaped through hole 64 formed in the upper part of the recess 57 is connected to the intermediate part of the support shaft 55 of the vibrating beater 53.

Further, a switch 65 for controlling power supply to the electromagnet 60 is provided in the drive device chamber 27. further,
Above the switch 65, a button 66 for turning the switch 65 on and off is provided on the upper case 22 by being biased upward by a leaf spring 67 formed integrally. A pair of light emitting diodes 68, which are located in front of the button 66 and are turned on or off according to the operation or stop of the vibrating beater 53 or the rotating brushes 40, 43, 44, are shown in FIG. Shown diode 69 is the upper case
It is provided so as to emit light toward the upper surface of 22.

 Next, the configuration of the electric circuit will be described with reference to FIG.

A rectifying diode 72, the switch 65, and the electromagnet 60 are connected in series between both poles of a 100V AC power source supplied from the cleaner body via the power supply line in the hose 70 and the extension pipe 71. Further, another switch 73 and the electric motor 49 for the rotating brushes 40, 43, 44 are connected in series between both poles of the same AC power source. The switch for this electric motor 49
The 73 is arranged at the grip of the hose 70. Further, a resistor 74, a diode 75 and the light emitting diode 68 are connected in series with the electromagnet 60 in parallel. Also, in parallel with the motor 49, a resistor 76, a diode 77 and a light emitting diode.
69 and are connected in series. Next, the operation of the above embodiment will be described. At the time of cleaning, the main body of the vacuum cleaner, the hose, the extension pipe, and the connection pipe 38 of the suction port body are connected to each other, and the grip portion of the hose is held. Then, the suction port main body 20 is positioned in front of the body, and the front and rear wheels 34, 35 are made to travel in the front and rear direction.

Then, by driving the electric blower of the cleaner body, the dust sucked together with the air from the suction ports 31, 32, 33, the suction chamber 26, the air passage chamber 28, the connecting pipe 36, 38 through the extension pipe and the hose, Guided to the dust collector of the vacuum cleaner. Here, the rotating brushes 40, 43, 44 can be operated or stopped by operating the switch 73 on the hose.

In addition, the vibration beater 53 is a switch on the suction port body 20.
By operating 65, the rotary brushes 40, 43 and 44 can be operated or stopped independently.

When the switch 65 is in the ON state, half-wave rectification is performed as shown on the upper right side of FIG. 5, and the half-wave rectified current flows into the electromagnet 60. Then, a magnetic force is generated by this current, but this magnetic force changes in a cycle of a commercial frequency of 50 Hz or 60 Hz. Then, when a current flows through the electromagnet 60 to generate a magnetic force, the magnetic force pulls the diaphragm 62 toward the electromagnet 60 side, elastically bends the support plate 61 in the direction of the electromagnet 60, and moves the connecting body 63 upward. Move the spindle 54
The vibrating beater 53 provided at the upper part moves upward as shown by the chain line in FIG.

Then, when the current stops flowing, the magnetic force disappears and the restoring force of the support plate 61 and the support shaft 54 and the vibration plate 62 and the vibration roller.
The inertial force due to the mass of 54 etc. works and returns to the original position.
Then, when a current flows through the electromagnet 60, the attraction force of the electromagnet 60 is added to the inertial force similar to the above, and the support plate 61 and the support shaft 55 are again bent toward the electromagnet 60 side.

By repeating this, the vibration roller 54 becomes 50Hz or 60Hz.
The vibrating beater 54 is driven by periodically bending in the vertical direction at Hz.

Then, the vibrating roller 54 of the vibrating beater 53 driven in this way hits the rug or fold surely to both ends, and even the fine dust that has entered the eyes of the rug or fold is also hit out efficiently. The dust blown out by the vibrating beater 53 is sucked from the suction port 31 through the notch 58 in the front surface of the recess 57.

Further, when the vibration beater 53 is not operated, the vibration beater along the rear side of the suction port 31 is
Since it acts as a sealing material that blocks the suction port 31 and the space behind it between the lower surface and the surface to be cleaned, the suction force from the front at the suction port 31 portion is improved. In addition, there is no fear that the seal material will be worn or damaged.

Further, since the striking body is constructed by attaching the support shaft and the cylindrical rotatable vibration roller to the support shaft, it is possible to smoothly move the suction port body.

〔The invention's effect〕

 According to the present invention, the following effects can be obtained.

In the suction port body of the electric vacuum cleaner according to claim 1, since the lower end of the outer periphery is positioned on the surface connecting the lower end of the outer periphery of the pair of wheels and the striking body is provided, the surface to be cleaned is strongly struck at a high speed. Therefore, for example, dust in the eyes of rugs and folds can be sufficiently released, and cleaning can be performed efficiently.

Further, since the hitting body is hit at a position in contact with the surface to be cleaned almost in parallel, the both ends of the hitting body can be surely hit and the cleaning can be performed very efficiently and cleanly.

In the suction port body of the electric vacuum cleaner according to claim 2, when the striking body is not driven, the striking body blocks the inflow of air from the rear at the suction port, and therefore also serves as a sealing material for increasing the suction force of the suction port. Therefore, it is possible to obtain the function of hitting the surface to be cleaned and the function of ensuring the vacuum degree of the suction port with a simple configuration.

[Brief description of drawings]

FIG. 1 shows an electric vacuum cleaner of the present invention. FIG. 1 is a vertical cross-sectional view of the suction port body AA ′ of FIG. 2, FIG. 2 is a plan view of the same except for the upper case, and FIG. 3 is a bottom view of the same. 4 is a transverse sectional view of the same, FIG. 5 is a circuit diagram of the same, FIG. 6 is a longitudinal sectional view of a suction port body of a conventional vacuum cleaner, and FIG. 7 is a transverse sectional view of the same. 20 …… Suction port body, 23,24,25 …… Partition wall, 26 …… Suction chamber, 31,32,33 …… Suction port, 34 …… Front wheel, 35 …… Rear wheel, 36,38 …… Connection tube, 40,43,44 …… Rotating brush, 49…
… Electric motor as drive source for rotating brush, 54 …… Vibration roller as hitting body, 57 …… Concave, 60 …… Electromagnet as drive source.

Claims (2)

(57) [Claims] 1. A at least one pair of connecting pipes communicating with a dust collecting chamber of a cleaner body, and a suction port communicating with the connecting pipes and opening downwardly and having a lower end outer periphery projecting downward from the bottom face. A suction port main body having wheels, an elastic shaft located between the pair of wheels along the suction port and having both ends fixed to the suction port main body, and the elastic shaft extending between the both ends. An electric vacuum cleaner comprising: a striking body having a lower end outer circumference located substantially on a plane connecting the lower end outer circumferences of the pair of wheels; and a drive source for periodically bending the elastic shaft upward. Suction mouth body. 2. A recess is provided on the bottom surface of the suction port main body so as to face the hitting body and serve as a working space for the driving operation of the hitting body, and at least a part thereof is close to the upper outer periphery of the hitting body. The suction port body of the vacuum cleaner according to claim 1, wherein: