JPH09182698A - Suction tool for vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display functional states of striking members striking a face to be cleaned. SOLUTION: A relay chamber 30 is formed in a suction tool 6, a dust collecting chamber 25 is formed in the bottom of the suction tool 6, bar striking members 14-16 which vibrate by a suction air flow are arranged in this dust collecting chamber 25, the first and second striking members 14, 15 are arranged in parallel to each other at some intervals near the front rear sidewalls 26a, 26b of the dust collecting chamber 25, and the third striking member 16 which extends along the first and second striking members 14, 15 is arranged in the depth of the suction air flow in the intermediate part of the first and second striking members 14, 15. An air passage Ap which extends in the direction crossing across the suction air flow is formed between the third striking member 16 and the first striking member 14, and between the third striking member and the first striking member 14.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a carpet, tatami mat,
Alternatively, the present invention relates to a suction tool of an electric vacuum cleaner that is used for sucking dust contained in a surface to be cleaned while striking a surface to be cleaned such as a blanket or a curtain to provide vibration.

[0002]

2. Description of the Related Art Cleaning while hitting the surface to be cleaned is
Since it can knock out dust that is sunk on the surface to be cleaned, it is excellent in that it has a high dust absorption effect. Electric vacuum cleaners having such a tapping function have been studied in the past. As a structure for removing the surface to be cleaned, a structure utilizing the driving force of an electromagnetic solenoid is used.
As described in Japanese Laid-Open Patent Publication No. 1-25192, it is proposed that the striking member is vibrated by the suction pressure so as to have no special drive device.

In these publications, a plurality of striking members are provided in a dust collecting chamber of a suction tool body to which a connecting pipe extending from the cleaner body is attached. The dust suction chamber communicates with the connection pipe and is opened on the lower surface of the suction tool body. The striking members vibrate vertically due to the suction pressure of the connecting pipe, and are arranged so as to substantially close the dust suction opening.

In Japanese Utility Model Publication No. 63-21228, as shown in FIG. 10, a suction chamber 72 is formed on the lower surface of a suction tool 71 of an electric vacuum cleaner, and a suction port 76 of the suction chamber 72 is provided. Three vibrating members 73, 74, 75 hitting the floor
Are arranged in parallel, and the suction chamber 72 is communicated with the cleaner body via the connection pipe 77. The suction chamber 76 has a substantially "convex" cross-section, and stoppers 76, 76 project from the upper portions of the front and rear side walls to narrow the suction chamber 72.

The vibrating members 73, 74, 75 are composed of large-diameter half-moon-shaped ridges 73a, 74a, 75a and small half-moon-shaped ridges 73b, 74b, 75b. Striking members 73, 74 are arranged near the front and rear side walls of the suction chamber 72, and a central vibration member 75 is arranged between the front and rear vibration members 73, 74. The vibrating members 73 and 74 in the vicinity of the side wall have the ribs 73a and 74a facing upward, and the vibrating member 75 at the center
Are in contact with each other with the ridges 75a facing downward. The front and rear vibrating members 73, 74 are guided by the front and rear side walls to move up and down, but the amplitude is regulated by a stopper 76.

Further, in the structure shown in FIG. 11, lower hitting members 81 and 82 are disposed near the side walls 80a and 80b before and after the opening 80 of the dust collecting chamber, and hit on the hitting members 81 and 82. A member 83 is provided.

[0007]

[Problems to be Solved by the Invention]
In the device disclosed in Japanese Patent No. 21228, since the vibrating members 73, 74 and the vibrating member 75 are in contact with each other at their spherical surfaces, the vibrating member 7
Air easily escapes from between 3,75 and between the vibrating members 74 and 75, the amplitude of the vibrating members 73 to 75 is small, the surface to be cleaned cannot be hit efficiently, and the left and right vibrating members 73 and 74 hit the stopper 76. There is a problem that the noise becomes loud.

Further, the striking members 81 to 81 having a circular cross section shown in FIG.
Similarly, in the case of No. 83, since the spherical surfaces contact each other, if a gap is created between the hitting members 81, 82 and the hitting member 83,
There is a problem that the negative pressure of the suction is easily reduced due to the entry of air and the amplitude of the hitting members 81 to 83 is likely to be insufficient.

The problem to be solved by the present invention is to prevent the negative pressure of suction that vibrates the hitting member from decreasing, to sufficiently secure the amplitude of the hitting member to improve the hitting-out effect, and to minimize the noise. The object is to provide a suction tool for an electric vacuum cleaner.

[0010]

A suction tool for an electric vacuum cleaner according to a first aspect of the present invention communicates with the connection pipe in a suction tool that extends left and right around a connection pipe that is communicated with the cleaner body. A relay chamber is formed, and a dust suction chamber that communicates with the relay chamber and extends in the left-right direction is formed on the lower surface of the suction tool, and a rod-shaped striking member that can be vibrated by the suction airflow is disposed in the dust suction chamber. In the suction tool for a vacuum cleaner, first and second striking members having elasticity along the longitudinal direction of the dust collection chamber are arranged in parallel near the front and rear side walls of the dust collection chamber. In the middle part of the striking member, at the position in the depth direction of the suction air flow,
A third striking member that extends along the first and second striking members and has elasticity is disposed, and when the first to third striking members are elastically deformed by the suction pressure, the first striking member is elastically deformed. Between the third tapping member and the first tapping member,
In addition, an air passage resistance unit that serves as an air passage resistance of the suction airflow is formed between the third striking member and the first striking member.

A suction tool for a vacuum cleaner according to a second aspect of the present invention is the suction tool for a vacuum cleaner according to the first aspect, wherein the third tapping member is elastically deformed by suction pressure,
After separating from the first and second striking members, between the first striking member and the third striking member and between the second striking member and the third striking member for a predetermined period. The feature is that the distance is constant.

A suction tool for a vacuum cleaner according to a third aspect of the present invention is the suction tool for a vacuum cleaner according to the first aspect, wherein a wall surface where the first striking member and the third striking member are in contact with each other,
In addition, it is characterized in that the wall surfaces of the second striking member and the third striking member in contact with each other are formed so as to coincide with the vibration directions of the first to third striking members.

According to the suction tool of claim 1 of the present invention,
A third striking member is disposed on the inner side of the suction airflow, and is located between the third striking member and the first striking member and between the third striking member and the first striking member. , Since the air passage resistance means is provided, the first to third
When the hitting member is deformed toward the inner side of the dust collecting chamber, air is disposed on the back side of the air flow in which the third hitting member sucks air, and between the third hitting member and the first hitting member, And the third
It becomes difficult for air to escape from between the hitting member and the first hitting member. For this reason, the decrease in suction negative pressure is reduced, the first to third striking members are largely deformed toward the inner side of the dust suction chamber, and the amplitudes of the first to third striking members are increased.
An efficient tapping effect can be obtained.

According to the suction tool of claim 2 of the present invention,
When the third striking member is deformed, the gaps between the first and third striking members and between the second and third striking members are kept constant, so that the striking member is sucked and the third striking member is sucked. Even if the striking member is deformed more than the first and second striking members, the suction negative pressure is less reduced. Therefore, the amplitude of the striking member becomes large, and the striking effect is improved.

According to the suction tool of claim 3 of the present invention,
Even when the third striking member hits the first and second striking members, no force is applied laterally to the suction air flow,
Since the wind pressure directly acts on the deformation of the striking member, the amplitude of the striking member becomes large, and unnecessary movement in the lateral direction is reduced, which makes it difficult to hit the side wall and the like, so that the amplitude of the striking member becomes large and the striking effect is further enhanced. improves.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the overall structure of an electric vacuum cleaner having a suction port body according to the embodiment. The main body 1 of the electric vacuum cleaner is detachably attached to a suction port of the main body 1, a dust suction hose 2, an operation handle 3 fixed to a tip portion of the hose 2, and a detachable end portion of the handle 3. Extension tubes 4 and 5 which are plugged in and connected to
The suction tool 6 is detachably inserted and connected to the tip of the extension tube 5 or the tip of the operation handle 3. The electric vacuum cleaner body 1 has a built-in electric blower (not shown), and its operation causes a dust suction operation. The operation handle 3 has a remote control switch for remote operation, and the operation of the switch controls the operation of the electric blower. In the following embodiments, the side of the suction tool 6 to which the extension tube 5 is connected is defined as the rear side, the opposite side of the extension tube 5 is defined as the front side, and the suction tube 6 is positioned with the connecting tube 12 down as shown in FIG. The right side of FIG. 3 and the left side of FIG.

<First Embodiment> The suction tool 6 of the first embodiment will be described below. Suction mouth body 1
As shown in FIGS. 2 to 6 and 8, 1 includes an upper case 21 and a lower case 22, which are made of a synthetic resin such as ABS resin or polypropylene, and are assembled with their open end faces facing each other. The overall shape of the suction port portion main body 11 is generally a horizontally long cylindrical shape, and the central portion in the longitudinal direction thereof swells so that it can easily slip off even if a futon or the like is applied to the outer periphery.

Inside the suction port body 11, the connecting pipe 1
The relay chamber 30 in which the two communicate with each other, the dust suction chamber 25 in communication with the relay chamber 30, and the ventilation chamber 41 are formed separately. The air sucked from the dust suction opening 25a into the dust suction chamber 25 is sucked into the connecting pipe 12 through the relay chamber 30.

<Upper Case> As shown in FIG. 8, a central partition 29 is formed on the inner surface of the upper case 21 so as to form a relay chamber 30 communicating with the connecting pipe 12. Central partition 2
9 has a planar shape in which the front side of the upper case 21 is rectangular and the rear side is trapezoidal, and the upper part of the relay chamber 30 is formed in the upper case 21. Similarly, the lower case 22 is also provided with a central partition 27 having a planar shape similar to that of the central partition 29. The central partition 27 of the lower case 22 and the central partition 29 of the upper case 21 form a relay chamber 30, and the rear portion of the relay chamber 30 is connected to the connecting pipe 3
Communicate with 0.

The central partition 27 of the upper case 21 and the lower case 2
Grooves and projections that fit with each other are continuously formed on the tip end surface of the second central partition 29, and the relay chamber 30 is formed by fitting the grooves and the projections of the central partition 27 and the central partition 29 with each other. Is formed. In the relay chamber 30, a rectifying rib 31 extending in the left-right direction is provided in a protruding manner. The rib 31 is
The suction air flow from the dust collection chamber 25 toward the connection pipe 12 and the air flow from the ventilation holes 51 and 52 formed in the lower case 22 toward the connection pipe 12 are prevented from swirling in the relay chamber 30. .

Around the central partition wall 29 of the upper case 21,
As shown in FIG. 8, a boss 21b to which a screw is screwed is projected. The upper case 21 and the lower case 22 have screws 23
Are fastened to the boss 21b with screws to be connected.

As shown in FIG. 4, at the central portion of the rear wall of the upper case 21 in the longitudinal direction, a substantially cylindrical protruding cylindrical portion 32 communicating with the rear end of the relay chamber 30 is integrally projected rearward. The connecting pipe 12 is rotatably attached to the tubular portion 32. The connecting pipe 12 is detachably connected to the distal end of the extension pipe 5 or the distal end of the operation handle 3 described above, and when the electric vacuum cleaner body 1 is operated, the suction pressure generated by the electric blower is connected to the connecting pipe 12. And the dust collection chamber 25 through the relay chamber 30.

Inside the suction tool 6, there is formed a ventilation chamber 41 which is partitioned from the relay chamber 30 and one of which is opened to the upper surface of the upper case 21 and the other of which is opened below the hitting members 14 to 16 on the side wall of the dust suction chamber 25. Has been done. A ventilation hole 42 is opened on the upper surface side of the upper case 21 of the ventilation chamber 41. As shown in FIG. 4, a ventilation chamber 39 is formed above the ventilation hole 41 so as to be separated from the relay chamber 30, and a urethane foam air filter 43 is disposed in the ventilation chamber 39. In the air filter 43, the air sucked from the ventilation hole 40 is introduced into the ventilation chamber 41 through the air filter 43 and is introduced into the dust suction chamber 25 through the ventilation hole 42. Thus, even if the dust suction opening 25a is closed by a futon or the like, air can be sucked even if the negative pressure in the dust suction chamber 25 becomes high.

<Lower Case> In the lower case 22, as shown in FIGS. 2 to 6, the dust collection chamber 2 extending in the lateral direction is elongated.
5 are formed. The central part of the dust collection chamber 25 is the relay chamber 30.
And the left and right ends of the dust collection chamber 25 extend to the left and right of the suction tool 6, and the vertical cross section of the dust collection chamber 25 is substantially inverted U.
It is partitioned by a partition wall 26 having a character shape.

In the dust collecting chamber 25, three hitting members 14 to 16 for picking up tatami mats, carpets, futons, etc. are arranged in parallel.

The edge portion 25c and the left and right edge portions 25d at the rear of the dust suction opening 25a of the dust suction chamber 25 are formed so as to be one step lower than the entire lower surface of the lower case 21, and when the lower case 21 is applied to the floor surface for suction. It is designed to form an air passage.

Reference numeral 28 in FIGS. 7 and 8 indicates a central partition wall 27.
Is a pair of partition walls extending forward from both side wall parts of the lower case 22 and integrally connected to the central part of the front wall of the lower case 22. The partition walls 28, 28, the front wall 27a of the central partition wall 27, and the lower case 21. A ventilation chamber 41 is formed by the central portion of the front wall of the. A ventilation hole 42 having a horizontally long rectangular shape is opened in the lower center of the front wall 27a of the central partition wall 27, and the ventilation chamber 3 is provided through the ventilation hole 42.
9, 41 and the dust collection chamber 25 communicate with each other.

As shown in FIGS. 3 and 5, a pair of steps 21b1 are formed on the left and right sides of the rear wall 26b of the partition wall 26. Between the pair of steps 21b1 and 21b1, there is provided a convex portion 26b2 protruding toward the hitting member 15 side near the rear wall 26b. The convex portion 26b2 is the partition wall 26.
Is formed in the central portion in the longitudinal direction of. The height A of the step 26b1 is about 0.5 to 1.0 mm.

As shown in FIGS. 2 and 3, at the lower end of the front wall 22c of the lower case 22, a groove 45 for disposing the bolt 23 is provided.
Are formed. The front end of the groove 45 communicates with the front outside air of the lower case 22 as an inlet 45a, and the rear end of the groove 45 has an outlet 4a.
5a communicates with the dust collection chamber 25.

At the rear edge of the dust suction opening 25a, a pair of grooves 47 are formed from the edge of the dust suction opening 25a to the lower portion of the connecting pipe 12 to form a gap between the floor surface and the lower surface of the lower case 22. Has been done. The groove 47 forms an air suction passage between the floor and the lower case 22 when the lower case 22 contacts the floor. The front side of the rib-shaped sled wall 48 between the pair of grooves 47, 47 is obliquely cut out so as to form a passage 47b with the floor surface. This groove 47
Even if the lower case 22 comes into contact with the floor surface via the passage 47b, the groove 47 and the passage 4 are provided between the lower case 22 and the floor surface.
7b, forming an air passage through the rear depression 25c,
Air can be sucked in over the entire area of the dust suction opening 25a. The sled wall 48 improves the runnability of the suction tool 6 in the front-rear direction. 2 and 4, reference numeral 49
Is a recess for preventing meat sink provided in the rear portion of the lower case 22, and reference numeral 50 is a recess for preventing meat sink provided on both sides of the pair of grooves 47.

Vent holes 51 and 52 shown in FIGS. 2 to 4 and 7 are opened in the rear recess 25c of the dust suction opening 25a. The vent holes 51 and 52 directly communicate with the relay chamber 30 without passing through the dust suction chamber 25. The ventilation holes 52 are provided on both sides of the pair of grooves 47. The ventilation holes 51 and 52 suck air when the suction tool 6 is separated from the surface to be cleaned, and reduce the vibrations of the hitting members 14 to 16. It is provided.

At least one, for example, two guards 53, which are flush with the lower surface of the lower case 22, are provided in the dust suction opening 25a. The guard 53 is formed of a bridge extending in the front-rear direction over the front and rear opening edges of the dust suction opening 25a that face each other, and at the central portion in the longitudinal direction of the dust suction opening 25a,
It extends at right angles to the striking members 14-16. Vent holes 52 are arranged near the rear ends of the pair of guards 53, respectively. The width of the entrance of these vent holes 52 is larger than the width of the guard 53.

As shown in FIGS. 3 and 4, a protrusion 54 is provided at the front edge of the dust suction opening 25a. The protruding portion 54 horizontally protrudes rearward from the lower end of the front wall 22c of the lower case 22, and the pair of guides 5
It is connected to the front end part of 3. The protruding portion 54 is
This lower surface 22 is flush with the lower surface 11a of the lower case 22
The outlet 42 is covered when viewed from the side 1a. As shown in FIG. 3, the width of the center of the three dust suction openings divided by the guard 53 is narrower than the width of the other dust suction openings.

<Striking member> In the dust collection chamber 25, the striking member 14
Nos. 16 to 16 are built in so as to vibrate vertically due to suction pressure. 4A and 4B show the hitting member 14
The cross-sectional shape of 16 is shown. In FIG. 4 (a),
The striking member 14 near the front wall 26a of the dust collecting chamber 25 is the first striking member, the striking member 15 near the rear wall 26b of the dust collecting chamber 25 is the second striking member, and the striking member 16 at the center is the first striking member 16. It corresponds to the hitting member of 3. Each striking member 14-16
Is composed of vibrating shafts 14a to 16a as a core member made of a spring wire such as a piano wire, beaters 14b to 16b inserted into the shafts 14a to 16a, and sleeves 14c to 16c. The beaters 14b to 16b are made of short tubes, and are made of rubber or elastomer in order to reduce operating noise.

The elastic modulus of the vibrating shaft 16a of the striking member 16 is
The vibrating shafts 14a and 15a of the striking members 14 and 15 are set to have a lower elastic modulus than the vibrating shafts 14a and 15a.
The elastic modulus is set higher.

The beaters of the striking members 14 and 15 are formed on the lower surface side facing the floor with an arcuate cross-sectional shape, and the striking member 16 as an air path resistance means is inserted into the beater portion 14d,
15d is formed.

The hitting members 14 and 15 are stepped portions 14d and 15d.
Are arranged so as to face each other, and the air hitting the hitting member 16 flows along the steps 14d and 15d, and when the hitting member 16 separates and the air enters, the airflow of the air hitting the hitting member 16 The direction is bent to increase the ventilation resistance. The flat wall surface 16d of the striking member 16 faces the low wall surfaces 14d 'and 15d' of the steps 14d and 15d. Striking member 14-1
6 is the wall surfaces 14d 'and 15d' of the striking members 14 and 15
So that the hitting member 16 and the wall surface 16d come into contact with each other,
It is arranged. In the center of the flat wall surface 16d of the striking member 16, a small-diameter circular arc cross-section portion 16e is formed between the striking members 14 and 15 with a space.

When a negative suction pressure is applied to the dust collection chamber 25 and the air flow flows into the dust collection chamber 25 from the floor of a tatami mat or a carpet, the flat wall surfaces 16d and 16d of the striking member 16 are hit with the air flow. The flat wall surface 16d of the tapping member 16 contacts the wall surfaces 14d 'and 15d' of the step portion, and the tapping member 16 and the tapping members 14 and 15 are integrally formed at the time of suction.
It transforms toward the back of 5.

At this time, the striking member 16 is the striking member 1
Since the elastic modulus is lower than 4, 15
The air currents hitting d and 16d are shunted along the wall surfaces 16d and 16d to the striking members 14 and 15 side.
Since the step portions 14d and 15d are formed in 15 and the gap between the step portion 14d15d and the hitting member 16 is constant in the deformation region of the hitting member 16, even if the hitting member 16 is deformed upward, the step portions 14d and 15d The amount of air passing between the striking member 16 and the striking member 16 becomes substantially constant.

For this reason, the hitting members 14 to 16 make the dust collecting chamber 2
Along the inner part of the curve 5, the curve greatly bends, the amplitude increases, and the hitting effect improves.

In the air flow passing through the dust collection chamber 25, the flow velocity of the air flow in the central portion is higher than that in the vicinity of the wall surface. Even if the elastic moduli of the members 14 and 15 are the same, the amount of deformation of the striking member 16 increases because the load applied to the striking member 16 is large. In addition, since the inner wall surface of the striking member 16 has an arc shape, negative pressure of the airflow is likely to occur in the inner portion, and the amount of deformation becomes larger.

The sleeves 14c to 16c, which are also used as spacers for limiting the axial movement of the vibrating shafts 14a and 15a to a minimum, have a diameter smaller than that of the beaters 14b to 16b, and the lengths of the vibrating shafts 14a to 16a are long. They are fitted at both ends in the direction. The number of beaters of each striking member 14-16 may be one instead of plural, and the beater 14b
-16b and sleeves 14c-1
It may be molded integrally with 6c.

As shown in FIGS. 3 and 7, the dust collection chamber 2
Bearings 61 and 62 formed separately from the lower case 22 are individually attached to the left and right ends of the casing 5. Bearing 6
Reference numerals 1 and 62 are composed of a pair of upper and lower comb-teeth-shaped members, and are configured to hold the shaft by inserting the tips of the other comb-teeth between the recesses of the one comb-teeth.

That is, on the left side of FIG. 3 (right side end in FIG. 7), the recess 61a for disposing the bearing 61 is formed inside the lower case 22 in a rectangular shape elongated in the front-rear direction. As shown in FIG. 7B, the bearing 61 is a vibration shaft 14
Three holes 61b for inserting a, 15a and 16a are formed. The holes 61b have sleeves 14c, 15c, 16c.
Does not pass. The bearing 61 is inserted from the inside of the case 22 into the recessed portion 61a and is integrally formed with the stopper 6.
It is stopped by 1c. The bearing 61 is a stopper 61c
Is placed in the state where it hits the edge of the placement recess 61a.
The bearing 61 is fixed by fitting with 1a. The side wall of the dust collection chamber 25 to which the bearing 61 is attached is opened so that the hole 61b of the bearing 61 is exposed in the dust collection chamber 25.

As shown on the left side of FIG. 7, a hole 62d for fixing the bearing 62 shown in FIG. 7C is provided on the left side of the dust collection chamber 25.
Is open. The hook portion 62c of the bearing 62 is hooked on the hole 62d. The bearing 62 has a hook portion 62c.
7 includes a comb-teeth-shaped piece 62a having a groove and a comb-teeth-shaped piece 62b that is inserted into a comb-teeth recess of the piece 62a.
As shown in (c), the pieces 62a and 62b are combined and the hook portion 62c is inserted and fixed from the lower surface side of the lower case 22. When the pieces 62a and 62b are combined as shown in the drawing, a hole 62e for inserting the vibration shafts 14a, 15a and 16a is formed.

The vibration shafts 14a to 16a are fixed to the bearing 61 and the comb-shaped piece 62a of the bearing 62 in advance on the left and right sides of the dust collection chamber 25, and then the tapping members 14 to 16 are formed under the guides 53 and 53 to form the holes 61b. After being inserted into the recesses between the comb teeth, the hook portion 6 of the piece 62b on the hook side of the bearing 62 is inserted.
2c is inserted into the hole 62d and fixed.

Strike members 14 to 16 in the dust collection chamber 25.
Is disposed slightly above the dust suction opening 25a, as shown in FIGS. Front and rear striking members 14, 1
The heights of 5 are the same, and the front wall 26a and the rear wall 26b are the same.
And the striking member 16 is disposed above the striking members 14 and 15. When viewed from the lower side of the lower case 22, the hitting members 14 to 16 are arranged side by side so as to substantially close the dust suction opening 25a.

When the suction pressure is not applied, each of the striking members 14 to 16 maintains a horizontal posture due to its elastic force. The hitting members 14 to 16 adjacent to each other may be in contact with each other, and the hitting members 14 to 16 may be provided at the same height without changing the height.

Between the striking members 14 to 16 and the front and rear walls of the dust collecting chamber 25, gaps B and C are formed in a state where the striking members 14 to 16 are kept horizontal without vibrating.
The gap B is a gap between the protrusion 26 b 2 of the rear side wall 26 b and the hitting member 15 in the center of the dust collection chamber 25 in the longitudinal direction. The gap C is a gap between the convex portion 26b2 and both ends of the striking member 15 in the longitudinal direction. The gap B is narrower than the gap C. Front wall 26a, rear wall 26
A gap D wider than the gap C is formed between the left and right ends of b and the left and right ends of the hitting members 14 and 15 in the vicinity. Further, a gap E having the same size as the gap D is formed between the left and right ends of the hitting members 14 to 16.

<Wheel> As shown in FIGS. 6 to 8, bearing grooves 36 are formed correspondingly on the facing surfaces of the walls 21a and 22a at the left and right ends of the upper and lower cases 21 and 22, respectively. The outer surface of the walls 21a at both ends of the upper case 21 has an inverted U shape.
A bearing 37 having a V-shaped cross section is integrally formed. Wheels 13 are rotatably held on bearings 37.

The wheel 13 is made of synthetic resin, and a wheel shaft 13a is provided on the inside of the cylindrical wheel 13 so as to project therefrom. A flange 13b is projectingly provided on the outer peripheral surface of the wheel shaft 13a.
The flange 13b is held in the bearing grooves 36 and 37 of the both end walls 21a and 22a. The wheel 13 covers and hides the end face of the suction port body 11 in the longitudinal direction.

<Operation> Next, the operation of the suction tool of this embodiment will be described.

Since the suction tool 6 of this embodiment is configured as described above, when the electric vacuum cleaner body 1 is operated, air is sucked through the dust suction hose 2 and the extension tubes 4 and 5, and this suction is performed. Negative pressure spreads over the entire area of the dust suction chamber 25 via the relay chamber 30 in the suction tool 6. As a result, the hitting members 14, 15 vibrate, so that if the lower case 22 is placed on the surface to be cleaned such as a bedding or a carpet, they can be cleaned while scooping them.

That is, when air is sucked from the dust suction opening 25a when the cleaner body starts sucking, the upper striking member 16 and the lower striking members 14 and 15 come into close contact with each other and are deformed upward together. Since the elastic modulus of the hitting member 16 is lower than the elastic modulus of the hitting members 14 and 15, when the wind pressure is applied, the hitting member 16 largely bends away from the hitting members 14 and 15, but the air ducts to the hitting members 14 and 15 are increased. Since the step portions 14d and 15d as the resistance means are formed,
The gap between the hitting member 16 and the hitting members 14 and 15 becomes constant. Therefore, it becomes difficult for air to pass therethrough, and a decrease in suction negative pressure is prevented. When the hitting member 16 is deformed to some extent, the gap between the hitting members 14 and 15 is widened, the negative pressure of suction is reduced, the hitting members 14 and 15 return to the floor surface side, and the hitting member 16 is slightly delayed. After returning to the side, the wall surfaces 14d 'and 15d' of the hitting members 14 and 15 are hit. As a result, the hitting members 14 and 15 integrally warp toward the floor surface and hit the surface to be cleaned. Since the hitting member 16 is in close contact with the hitting members 14 and 15 and the wall surface 16d and the wall surfaces 14d 'and 15d', the suction negative pressure is received again and the operation of flexing to the inner side of the dust suction chamber 25 is repeated.

As a result, the surface to be cleaned, such as the surface cloth of the futon, which is sucked in the dust suction opening 25a, is picked up. Due to the elastic modulus and the difference in mass, the striking members 14 and 15 are warped downward at a higher speed than the striking member 16 and are deformed to perform the scraping operation as shown in FIG. The striking motion of the striking member 16 on the surface to be cleaned is hindered by the striking members 14 and 15.
The striking members 14 to 16 repeatedly collide with each other due to pulsation of the airflow acting between the striking members 14 to 16.

After the cleaning of the surface to be cleaned as described above, each of the striking members 14 to 16 returns to the original position where it substantially closes the dust suction opening 254a again. Therefore, the above operation is repeated and each striking member 14 is repeated. ~ 16 vibrates up and down. This makes it possible to absorb dust while scrubbing the surface to be cleaned. Dust on the surface to be cleaned is struck by the dust picked up while smashing, so the dust absorption effect is high.

Further, in the gaps B and C of the striking members 14 to 16, the gap C is larger than the gap B, so that the suction pressure acting through the connecting pipe 12 is sufficiently exerted, and the amplitude of the striking members 14 to 16 is increased. Can be increased. This gives
In order to form a large air passage in the center of the dust collection opening 25a,
Can inhale large dust.

On the other hand, since the suction pressure on both sides in the longitudinal direction of the dust suction chamber 25 is lower than the suction pressure at the central portion, the gap C is wide, so that a large amount of dust can be sucked and the dust is less likely to be clogged. It's easy to take. Also,
The configuration for providing a difference in the size of the gap is simple. Vibration axis 1
4a to 16a are provided with sleeves 14c to 16c having a smaller diameter than the beaters 14b to 16b, the gap D can be formed wider than the gap B with a simple structure, a large amount of dust can be sucked in, and the dust can be easily clogged. You can take it out. Since there is the pair of guards 53, it is possible to prevent a cover cloth such as a futon from being sucked into the dust suction chamber 25 deeply, and to enhance the traveling property at the time of cleaning and quickly absorb dust. Since the protruding portion 54 protrudes, it is possible to prevent the ventilation hole 42 from being blocked by the surface to be cleaned such as the cloth sucked by the protruding portion 54 to the dust suction opening 25a.

When the entire dust suction opening 25a is closed by a soft cleaning surface such as a futon, the entrance 45a of the groove 45,
Since the outside air can pass through at least one of the ventilation hole 42, the outlet 47, the air passage 51, etc., the supply amount of air for vibrating the hitting members 14 to 16 can be secured. Therefore, in cleaning not only the surface such as the tatami mat but also the soft surface to be cleaned such as a futon, the vibrating operation of the striking members 14 to 16 can be continued to knock out the dust on the surface to be cleaned and absorb the dust.
It is possible to secure a sufficient amount of air for the electric blower in the electric vacuum cleaner body 1 that is in communication with the connection pipe 12 and reduce the load on the electric vacuum cleaner body 1 side.

FIG. 9A shows a second embodiment of the hitting member of the present invention. The hitting member of the second embodiment is provided with hitting members designated by reference numerals 80, 81 and 82, respectively. The striking members 80 and 81 are arranged below the dust collecting chamber 25 and are spaced apart from each other along the wall.
2 is arranged in the upper middle portion of the hitting members 80, 81.

The hitting member 80 has a beater 80b integrally provided around a vibrating shaft 80a made of a piano wire.
The beater 80b is provided with two protrusions 80c having a triangular cross section at a portion in contact with the hitting member 82 arranged above. The protrusion 80c is formed over the entire length of the beater 80b. The striking member 81 is also formed to have the same cross section as that of the striking member 80 only by changing the left and right directions.

The upper striking member 82 does not have a core material,
The upper striking member 82 has a protrusion 82 that enters a valley between the protrusions 80c and 81c of the lower beaters 80b and 81b.
Two a are formed on each of the left and right sides, for a total of four places. At the center of the lower surface of the striking member 82, there is formed a protrusion 82b which is inserted between the striking members 80 and 81. The protruding portion 82a and the protruding portion 80c form an air passage resistance means.

In this embodiment, the projections 80c, 8 are provided between the striking members 80-82 in the direction orthogonal to the intake direction.
1c and 82a are arranged, and the cross sections thereof are each a triangular cross section. Therefore, when the upper striking member 82 is deformed upward, air is blown between the striking members 80 and 81 and the striking member 82. Resistance to the passing air passages makes it difficult for air to escape. Moreover, when the hitting members 80 to 82 come into contact with each other, the peaks and troughs of the projections 80c, 81c, and 82a enter, so that the hitting members 80 to 82 largely bend in the direction in which negative suction pressure acts.

Further, the hitting member 90 of FIG. 9 (b) shows the third embodiment of the present invention, and the lower hitting members 83, 84 arranged near the front and rear walls of the dust collecting chamber 25. Is provided with a plurality of plastic beaters 83b and 84b connected around the vibrating shafts 83a and 84a. The upper surfaces of the beaters 83b and 84b are formed flat so as to extend in the direction orthogonal to the suction air flow, and the sealing surface is Has been formed.
Similarly, the beater 85 on the upper part is integrally formed with a beater 85b around the vibrating shaft 85a, and the lower surface of the beater 85b is formed with a projection 85c located between the beaters 83 and 84.

According to the striking members 83 to 84 shown in FIG. 9B, the intermediate striking member 85 is provided, and the lower surface of the striking member 84 is in close contact with the striking members 83 and 84, so that the striking member 85 is formed.
And the hitting members 83, 84 integrally bend greatly. When the suction negative pressure becomes stronger, the hitting member 83 having a high elastic modulus,
Since the hitting member 85 having a low elastic modulus separates from 84 and a negative pressure is sucked due to a gap, the hitting members 83 and 84 return to the original shape, and then the hitting member 85 hits the hitting members 83 and 84 to bring them into close contact again. ， Repeat the operation of receiving the negative pressure to suck and transforming into one. Therefore, the efficiency of the striking operation of the striking members 83 to 85 can be increased.

FIG. 9 (c) shows a fourth embodiment of the present invention, in which the lower tapping members 86 and 87 disposed near the front and rear wall surfaces of the dust collection chamber 25 are located above the intermediate portion. An upper striking member 88 is provided. The hitting members 86 to 88 have plastic beaters 86b and 87b integrally connected and fixed around the vibrating shafts 86a and 87a.
The upper surfaces 86c and 87c of the lower beaters 86b and 87b are flat surfaces. At the center of the lower surface of the upper beater 88b, a protrusion 88d is provided between the hitting members 86 and 87.
Are projected as air path resistance means, and projecting parts 88 projecting toward flat lower beaters 86, 87 on both sides of the projecting part 88d.
e, 88e are formed. The protrusion 88e is formed over the entire length of the beater 88. This protrusion 88e
As a result, the gap between the hitting members 86 to 88 is closed, and the hitting members 86 to 88 are integrally bent toward the inner part of the dust collecting chamber 25 by receiving negative suction pressure. When the negative pressure becomes high, a gap is created between the hitting members 86 to 88, the hitting members 86 and 87 having a high elastic modulus return to the original shape first, and the hitting members 88 and 87 having a low elastic modulus delay later. Strike to become one again and repeat the vibration operation.

Further, FIG. 9 (d) shows a fifth embodiment of the present invention, showing the arrangement of the striking members 89, 90, 91 arranged in the dust collecting chamber 25. Hitting member 89,
90 and 91 have shafts attached to the bearings 61 and 62. A step portion 8 which is dented at a right angle is formed on the upper surface portion of the lower tapping members 89 and 90 arranged near the front and rear side walls of the dust collection chamber 25.
9a and 90a are formed. The upper striking member 91 is arranged so as to enter the stepped portions 89a, 90a between the striking members 89, 90. Lower surface 91 of upper hitting member 91
The a is provided with a pair of protrusions 91b that abut against the collision surfaces 89a and 90a, and an air passage is formed between the horizontal surfaces of the stepped portions 89a and 90a and the lower surface 91a of the striking member 91. Vertical wall portions 89b, 90b extending in the direction of the suction airflow of the step portions 89a, 90a and both side wall surfaces 91b of the hitting member 91.
Is a constant interval, and the striking member 91 has a rectangular cross section and constitutes an air passage resistance means.

The striking members 89 to 91 shown in FIG. 9 (d) thus have a rectangular cross section between the step portions 89a and 90a.
1, and the vertical wall portions 89b and 90 of the step portions 89a and 90a are arranged.
Since b is a wall surface extending in the direction of the suction air flow, and both side wall surfaces 91b of the striking member 91 are parallel to the vertical wall portions 89b and 90b, the striking member 91 is bent into the interior of the dust collection chamber 25 by suction negative pressure. However, since the gap C is constant between the side wall surface 91b and the vertical wall portions 89b and 90b in a certain area where the hitting member 91 is deformed, air passage resistance is generated, and the hitting members 89 and 90 are bent integrally. When the amount of deformation of the striking member 91 becomes large and the vertical wall portions 89b, 90b and the side wall surface 91b do not face each other, the amount of air currency suddenly increases, the suction negative pressure decreases, and the elastic modulus is high. Hitting member 8
9 and 90 return to the original shape first, and the hitting member 9 with a low elastic modulus is used.
1 hit a little late with 89,90. The hitting member 91 is hit again by hitting the hitting members 89, 90.
Repeatedly oscillates as it receives negative pressure that is integrated with 0.

Although the suction tool for the electric vacuum cleaner according to the embodiment of the present invention has been described above, the present invention can be applied even if the wheel 13 is not provided. Also, the above embodiments may be combined as appropriate.

[0071]

According to the suction tool for the electric vacuum cleaner of the first aspect of the present invention, the third striking member is disposed on the inner side of the suction airflow, and the third striking member and the first striking member are arranged. Since the air path resistance means is provided between the member and between the third striking member and the first striking member, the first to third striking members are deep inside the dust collecting chamber due to the suction airflow. When deformed toward, the third striking member is disposed on the inner side of the suction airflow, and the third striking member and the first striking member and the third striking member and the second striking member are disposed. It becomes difficult for air to escape from between the striking member and. Therefore, the negative pressure of suction is reduced less, the first to third striking members are largely deformed toward the inner side of the dust-collecting chamber, and the amplitudes of the first to third striking members are increased. It is possible to obtain a striking effect.

According to the suction tool of claim 2 of the present invention,
When the third striking member is deformed, the gaps between the first and third striking members and between the second and third striking members are kept constant, so that the striking member is sucked and the third striking member is sucked. Even if the striking member is deformed more than the first and second striking members, the suction negative pressure does not decrease. Therefore, the amplitude of the striking member becomes large, and the striking effect is improved.

According to the suction tool of claim 3 of the present invention,
Even when the third striking member hits the first and second striking members, no force is applied laterally to the suction air flow,
Since the wind pressure directly acts on the deformation of the striking member, the amplitude of the striking member becomes large, and unnecessary movement in the lateral direction is reduced, which makes it difficult to hit the side wall and the like, so that the amplitude of the striking member becomes large and the striking effect is further enhanced. improves.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electric vacuum cleaner including a suction tool according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of a suction tool according to the first embodiment.

FIG. 3 is a diagram showing a configuration of a lower surface of the suction tool according to the first embodiment.

FIG. 4 is a cross-sectional view taken along the line ZZ of FIG. 3, showing a structure of a valve body and a cylinder.

5 is a cross-sectional view taken along the line YY of FIG.

FIG. 6 is a sectional view taken along line XX of FIG.

7A is a plan view showing the configuration of the lower case of the first embodiment, FIG. 7B is a perspective view showing one shape of the bearing of the vibration shaft, and FIG. 7C is the other of the bearings of the vibration shaft. Perspective view showing the shape of

FIG. 8 is a perspective view showing a disassembled state of the suction tool of the first embodiment.

9A is a sectional view of a striking member according to a second embodiment of the present invention, FIG. 9B is a sectional view of a striking member according to a third embodiment of the present invention, and FIG. Sectional drawing of the striking member of embodiment, (d) is sectional drawing of the striking member of 5th Embodiment of this invention.

FIG. 10 is a sectional view of a hitting member disclosed in Japanese Utility Model Publication No. 63-21228.

FIG. 11 is a sectional view of a conventional striking member.

[Explanation of symbols]

 11 Suction Port Main Body 12 Connection Pipes 14, 15, 16 Striking Member 21 Upper Case 22 Lower Case 25 Dust Collection Room 30 Relay Room 41 Ventilation Room 42 Vent Hole 54 Projection

Claims (3)

[Claims] 1. A relay chamber communicating with the connecting pipe is formed in a suction tool extending left and right around a connection pipe communicating with the cleaner body, and a relay chamber communicating with the relay chamber is formed on a lower surface of the suction tool. A suction tool for an electric vacuum cleaner in which a dust suction chamber extending in the left-right direction is formed, and a rod-shaped striking member capable of vibrating by a suction airflow is disposed in the dust suction chamber, wherein the dust suction chamber is provided near the front and rear side walls of the dust suction chamber. Elastically arranging first and second striking members in parallel with each other in the longitudinal direction, and at an intermediate position between the first and second striking members in the depth direction of the suction airflow, A third striking member that extends along the first and second striking members and has elasticity is disposed, and when the first to third striking members are elastically deformed by the suction pressure, the first striking member is elastically deformed. 3 tapping member and the above Between 1 hitting elements, and,
A suction tool for an electric vacuum cleaner, characterized in that an air passage resistance means for forming an air passage resistance of the suction airflow is formed between the third striking member and the first striking member. 2. The suction tool for an electric vacuum cleaner according to claim 1, wherein the third striking member is elastically deformed by suction pressure and is separated from the first and second striking members for a predetermined period of time. A suction tool for an electric vacuum cleaner, wherein a distance between the first striking member and the third striking member and a distance between the second striking member and the third striking member are constant. 3. The suction tool for an electric vacuum cleaner according to claim 1, wherein the first hitting member and the third hitting member are in contact with each other, and the second hitting member and the third hitting member are in contact with each other. A suction tool for an electric vacuum cleaner, wherein the contacting wall surface is formed so as to match the vibration directions of the first to third striking members.