JP3268515B2 - Electric vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner, and more particularly, to an improvement in operability by eliminating a malfunction of a safety valve for air intake for preventing an excessive load from being applied to an electric blower. More particularly, the present invention relates to an electric vacuum cleaner which prevents deformation of an upper lid during operation of the vacuum cleaner.

[0002]

2. Description of the Related Art FIG. 11 is a plan view showing the internal structure of a conventional vacuum cleaner with a portion cut away, and FIG. 12 is a front view showing the internal structure of the vacuum cleaner with a portion cut away. In the figure, 1 is an electric blower, 2 is a dust collecting chamber, and communicates with the electric blower 1 through a partition wall (not shown) whose central part is formed in a lattice shape. The electric blower 1 and the dust collecting chamber 2 constitute a cleaner body. Reference numeral 3 denotes a paper bag that collects dust stored in the dust collection chamber 2. 4 is a lower case that covers the entire lower part of the electric blower 1 and the dust collecting chamber 2 and is provided integrally with a partition wall;
4a is a seal packing provided on the upper edge of the lower case 4 on the side of the dust collecting chamber and the upper edge of the partition wall, 5 covers the electric blower 1,
An upper case 7, which forms an electric blower chamber 6 with a part of the lower case 4, is rotatably attached to the upper case 5, and forms an dust collecting chamber 2 with a part of the lower case 4 when the lid is closed. A lid 8 is a safety valve chamber provided by recessing a portion of the upper lid 5 on the side of the electric blower chamber, and an air guide hole 8a is provided in a bottom wall of the safety valve chamber 8 and communicates with the dust collection chamber 2. I have. Reference numeral 9 denotes a safety valve chamber lid that covers an upper opening of the safety valve chamber 8, 10 denotes a safety valve for air intake disposed in the safety valve chamber 8, 11 denotes an air intake lattice window provided in the safety valve chamber lid 9, and 12 denotes a window. This is a valve operation confirmation window provided in the safety valve chamber lid 9.

[0003] The safety valve 10 is a valve seat 1 having a transparent cylinder 13 and a ring-shaped valve port fitted to one end of the cylinder 13.
4 and a spring receiver 15 provided inside the other end of the cylindrical body 13.
And a valve body 16 which abuts against the valve seat 14 to close the valve port.
A coil spring 17 having one end supported by the spring receiver 15 and the other end constantly biasing the valve body 15 toward the valve seat 14.
And an L-shaped air guide pipe 18 connected to the other end of the cylindrical body 13. The other end of the air guide pipe 18 of the safety valve 10 is connected to an air guide hole 8 a provided at the bottom of the safety valve chamber 8, and the end of the cylinder 13 of the safety valve 10 on the valve body side is directly below the air intake lattice window 11. It is arranged in. Reference numeral 19 denotes a hose insertion port provided on the dust collection chamber side of the lower case 4.

[0004] The conventional vacuum cleaner is configured as described above. For example, during operation of the vacuum cleaner, air and dust sucked from a hose (not shown) enter the dust collecting chamber 2 through a hose insertion port 19, Debris accumulates in the paper bag 3 in the dust collection chamber 2, and the air enters the electric blower room 6 through the grid-like central portion of the partition wall and is sucked into the electric blower 1. When the garbage in the paper bag 3 becomes full, the flow of air passing through the dust collection chamber 2 becomes worse, and the electric blower 1
Since the rotation speed is increased and the suction force is increased, an excessive load is applied to the electric blower 1. Then, the safety valve 10
A negative pressure is generated in the cylindrical body 13 and the air guide pipe 18, and the valve body 16, which has hitherto contacted the valve seat 14 with the spring pressure of the coil spring 17, moves away from the valve seat 14, so that one end of the cylindrical body 13 The valve opening of the valve seat 14 is opened, and the safety valve chamber lid 9 is opened.
The air is taken in from the air intake lattice window 11 provided in. The air enters the safety valve 10, enters the dust collection chamber 2 from the air guide pipe 18 through the air guide hole 8 a, enters the electric blower room 6 through the partition wall, and is sucked into the electric blower 1, so that the air in the paper bag 3 Even if the dust is full, an excessive load is prevented from being applied to the electric blower 1. This air flow is indicated by arrow S.

[0005]

In the above-described vacuum cleaner, it is most effective for the operation of the safety valve 10 to provide the air intake lattice window 11 in the safety valve chamber lid 9 provided in the upper lid 7. However, when dust or dirt accumulates in the safety valve 10 because dust and dirt in the outside air enter the safety valve chamber 8 through the air intake lattice window 11 provided in the upper lid 7 during cleaning or standing, the safety valve The safety valve 10 malfunctions due to poor airflow passing through the inside of the airbag 10 or dust or dirt adhering to the valve body 16 and the coil spring 17, causing insufficient suction and excessive suction of the electric blower 1. There is a problem in that a heavy load is applied and the electric blower 1 eventually breaks down. Further, the movement of the valve element 16 of the safety valve 10 is viewed from the valve operation confirmation window 12 provided in the safety valve chamber lid 9 to determine whether or not the dust in the paper bag 3 of the dust collection chamber 2 is full. In this case, if the valve element 16 malfunctions, it is impossible to confirm whether or not the safety valve 10 is operating normally based on the movement of the valve element 16.

Further, since the vacuum cleaner is a product that frequently moves during cleaning or when it is carried, it often encounters external force such as hitting furniture or the like. Have been. However, since the safety valve chamber lid 9 which is an external part has the air intake lattice window 11, there is a problem in that when an external force such as a collision with an object is applied, the safety valve chamber lid 9 is weak in strength and is broken. .
Furthermore, when the inside of the dust collecting chamber 2 is in a negative pressure state during the operation of the cleaner, the upper lid 7 is compressed by the atmospheric pressure in the direction of the arrows Fa and Fb, and is deformed. An extra gap is formed at the joint between the case 5 or the upper lid 3 and the lower case 4, and air flows into the dust collection chamber 2 from the gap, so that the inside of the dust collection chamber 2 cannot be maintained at a negative pressure, and the dust collection performance There is also a problem that it leads to a decrease.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and it is possible to prevent dust and dirt from entering a safety valve, to eliminate a malfunction of the safety valve, and to prevent an object from being bumped. To obtain a vacuum cleaner that can prevent the air intake lattice window from being damaged even when an external force is applied and prevent the upper lid from being deformed when the dust collecting chamber falls into a negative pressure state, so that efficient air can be taken in. With the goal.

[0008]

According to the present invention, there is provided a vacuum cleaner comprising: a cleaner main body comprising an electric blower and a dust collecting chamber communicating with the electric blower; A lower case having a partition wall separating the blower and the dust collecting chamber; an upper case which covers an upper part of the electric blower of the cleaner body and forms an electric blower chamber with a part of the lower case; Rotatably attached to the case,
An upper lid forming a dust collecting chamber of the cleaner body with a part of the lower case when the lid is closed, and an air guide hole provided below the upper lid and communicating with the dust collecting chamber in a bottom wall. A safety valve chamber having a safety valve inside, one end of which is connected to the air guide hole, and the other end of which is closed by a valve body constantly biased by a spring, and a side wall of the safety valve chamber on the side of the electric blower chamber, An air intake lattice window provided at a position near the air intake of the safety valve, and a slit-shaped air intake formed between abutting edges of the upper lid and the upper case when the upper lid is closed. It is provided with an input gap.

The partition wall of the lower case is provided with a sloping bent wall near the air inlet of the safety valve, and the side wall of the safety valve chamber on the side of the electric blower chamber is closed when the lid is closed. It is also possible to provide a skewed bent portion that engages with the bent wall portion, and to provide an air intake lattice window in the bent portion. Further, a right-angled bent wall portion is provided on the partition wall of the lower case at a position near the air inlet of the safety valve, and the bent wall of the partition wall is provided on a side wall of the safety valve chamber on the side of the electric blower room when the lid is closed. It is also possible to provide a right-angled bent portion that engages with the upper portion of the portion, and to provide a lattice window for an air intake at the bent portion. Further, on the upper part of the partition wall of the lower case, a hanging pressing piece for pressing an upper edge of a filter provided on the dust collecting chamber side of the partition wall and a knob rib protruding toward the safety valve chamber are provided on a side edge of the main body. And a flexible filter upper pressing member having a plurality of air vent holes in the main body may be attached. Further, the filter is provided on the upper part of the filter front pressing member which is provided in the lower case and presses the front surface of the filter provided on the dust collecting chamber side of the partition wall, on the filter provided on the dust collecting chamber side of the partition wall. A flexible filter upper holding member having a hanging holding member for holding the edge and a knob rib protruding toward the safety valve chamber on a side edge of the main body and having a plurality of air vent holes in the main body is detachably attached. It may be.

[0010]

In the present invention, the air intake lattice window is provided at a position near the air intake of the safety valve on the side of the electric blower chamber side of the safety valve chamber provided below the upper lid, and the upper lid is closed when the lid is closed. A slit-shaped air intake gap is formed between the butting edges of the lid and the upper case, and the air intake gap is slit-shaped and narrow, so that when the vacuum cleaner is not in use, the air intake gap is reduced. When it is difficult for dust or dirt to get inside the vacuum cleaner, and when the paper bag inside the dust collection chamber becomes full during operation of the vacuum cleaner, air taken into the vacuum cleaner from the air intake gap is taken into the air intake lattice window. The air taken into the vacuum cleaner also contains less dirt and dust, greatly reducing the ingress of dirt and dust into the safety valve room, and greatly reducing the ingress of dirt and dust into the safety valve. Safety valve So that the work. In addition, since the air intake lattice window is provided on the wall of the safety valve room inside the vacuum cleaner provided below the upper lid, the air intake lattice is provided even if an external force such as an object hits the upper lid. The windows will not be damaged.

In addition, a sloping or right-angled bent wall portion is provided on the partition wall of the lower case near the air intake of the safety valve, and the side wall of the safety valve room on the side of the electric blower room when the lid is closed is closed. A skewed or right-angled bent wall that engages with the upper part of a skewed or right-angled bent wall portion is provided, and the bent portion is provided with a lattice window for an air intake. The lattice window obliquely faces or faces the air intake which is one end of the safety valve provided in the safety valve chamber, and the air intake efficiency of the safety valve is improved. In addition, since the air intake lattice window is provided on the wall of the safety valve room, which is the interior of the vacuum cleaner provided below the upper lid, at an angle or at a bent portion at a right angle, the upper lid may be hit by an object. Even if an external force is applied, the air intake lattice window will not be damaged.

Further, the side wall of the safety valve chamber provided below the upper lid on the side of the electric blower chamber has a skewed or right-angled bent portion, and the bent portion forms a partition wall of the lower case when the lid is closed. Since the dust collecting chamber is in a negative pressure state during the operation of the vacuum cleaner and is in the direction of arrows Fa and Fb due to atmospheric pressure, that is, When a compression force is generated, the compression force acts on the wall surface of the safety valve room on the side of the electric blower room to bend, but the side wall to be bent is skewed in the middle. Or the right angled bent portion is engaged with the upper portion of the bent wall portion of the partition wall of the lower case, and becomes a shape supported by the upper portion of the bent wall portion. The holding force of the shape increases against the compressive force from the left and right of the Less likely to be.

[0013] Further, a suspending piece for suspending the upper edge of a filter provided on the dust collecting chamber side of the partition wall, above the upper part of the partition wall of the lower case or the upper part of the filter front retaining member erected on the lower case. And a gripping rib protruding toward the safety valve chamber at the side edge of the main body, and a flexible filter upper pressing member having a plurality of air vent holes in the main body is attached to the main body of the filter upper pressing member. The holding piece provided on the side edge of the part holds the upper edge of the filter provided on the front surface of the partition wall, and the holes among the holes provided in the main body part pass through the safety valve in the safety valve chamber and air guide. The air coming out of the hole is guided so as to come to the front of the filter, and the other holes guide the air that has passed through the upper part of the dust collecting chamber so as to come to the front of the filter.

A knob provided on a side edge of a main body of a filter upper holding member attached to an upper portion of a partition wall of the lower case or an upper portion of a filter front holding member erected on the lower case is provided in a safety valve chamber. As the paper bag in the dust collection chamber fills up, it enters the space created between the filter upper holding member and the safety valve chamber and flows out of the air guide hole in the safety valve chamber to the front of the filter. The filter prevents air from blocking the road and guides the air coming out of the air guide hole to the front of the filter.In addition, when replacing the filter, the user pulls the gripping rib and lifts the flexible filter upper holding member upward, thereby filtering the filter. The filter can be easily replaced without the upper holding member being in the way.

[0015]

【Example】

Embodiment 1 FIG. FIG. 1 is a plan view showing an internal structure of a vacuum cleaner according to a first embodiment of the present invention, with a part of the vacuum cleaner being cut away, and FIG. FIG. 3 is a side view showing the internal structure of the vacuum cleaner with a portion cut away. In the figure, the same components as those of the conventional example are denoted by the same reference numerals as those of the conventional example, and the description of the same components is omitted. 2
Reference numeral 1 denotes a linear side wall 8b on the electric blower chamber side of the safety valve chamber 8 provided below the upper lid 7, and air provided right next to a valve seat 14 having a valve opening serving as an air intake of the safety valve 10. The intake lattice window 22 is provided when the upper lid 7 is closed.
A slit-shaped air intake gap formed at a part between the butted edges of the upper case 5 and the upper case 5, for example, the width is approximately 1 mm at a substantially central portion, and gradually decreases toward both ends,
The length is slightly smaller than the length of the safety valve chamber lid 9. Reference numeral 23 denotes a partition wall provided in the lower case 4 at a central portion in a lattice shape, reference numeral 24 denotes a filter attached to the dust collection chamber side of the partition wall 23, and reference numeral 25 denotes a filter provided in the lower case 4 so that the filter 24 does not fall. And a plurality of filter pressing ribs which are filter front pressing members for pressing the entire front surface of the filter.
Reference numeral 26 denotes a pivotal support for rotatably mounting the upper lid 7 to the upper case 5. The center of the air guide hole 8a of the safety valve chamber 8 of this embodiment matches the center of the air suction port 1a of the electric blower 1 as shown in FIG. 2, and the air suction hole of the electric blower 1 as shown in FIG. It is located diagonally right above the mouth 1a. Arrow S indicates the flow of air.

Next, the operation of the embodiment configured as described above will be described. First, when the upper lid 7 is closed, the upper lid 7 is closed.
A slit-shaped air intake gap 22 is formed in a part between the butted edges of the upper case 5 and the upper case 5. Since the air intake gap 22 is slit-shaped and narrow, dust and dirt are unlikely to enter the inside of the vacuum cleaner from the air intake gap 22 when the vacuum cleaner is not used. Next, when the vacuum cleaner is operated, air and dust sucked from a hose (not shown) enter the dust collection chamber 2 through the hose insertion port 19 during operation, and the dust is collected in the paper bag 3 in the dust collection chamber 2. The pool and the air enter the electric blower room 6 through the grid-shaped central portion of the communication hole 23 of the partition wall, and are sucked into the electric blower 1.

When the garbage in the paper bag 3 becomes full,
If the flow of air passing through the dust collection chamber 2 becomes poor and an excessive load is applied to the electric blower 1, the valve opening of the valve seat 14 at one end of the safety valve 10 opens as in the related art, and the upper lid 7 and the upper case 5 The air taken in from the air intake gap 22 formed between the air vents is taken into the air intake lattice window 21 provided on the side wall 8 b of the safety valve chamber 8 on the side of the electric blower room, and enters the safety valve chamber 8. The air that has entered the safety valve chamber 8 enters the dust collection chamber 2 from the air guide pipe 18 of the safety valve 10 through the air guide hole 8a.
The electric fan 1 enters the electric blower room 6 through the partition wall 23.
Therefore, even if the dust in the paper bag 3 becomes full, an excessive load is prevented from being applied to the electric blower 1.

During the operation of the vacuum cleaner, the air taken into the air intake grid window 21 is supplied to the narrow air intake gap 22 formed between the upper lid 7 and the upper case 5.
, Dust and dirt are less likely to be contained in the air taken into the cleaner, and the intrusion of dirt and dust into the safety valve chamber 8 is greatly reduced, and dirt and dust enter the safety valve 10. Is greatly reduced, the safety valve 10 operates without any trouble. In addition, since the air intake lattice window 21 is provided on the side wall 8b of the safety valve chamber 8 inside the vacuum cleaner provided below the upper lid 7,
Even if an external force such as an object colliding with the upper lid 7 is applied, the air intake lattice window 21 will not be damaged. It should be noted that the air intake gap 22 of this embodiment may be formed by providing a cutout in the upper case 5 or by providing a cutout in both the upper lid 7 and the upper case 5. Of course. Further, the length of the air intake gap 22 in this embodiment is slightly smaller than the length of the safety valve chamber lid 9, but may be substantially the same as the length of the safety valve chamber lid 9. It goes without saying that the invention can be practiced with an overall length.

Embodiment 2 FIG. FIG. 4 is a plan view showing an internal structure of a vacuum cleaner according to a second embodiment of the present invention, with a portion cut away. In the drawing, the same components as those of the first embodiment of the present invention are denoted by the same reference numerals as those of the first embodiment, and the description of the same components will be omitted. In this embodiment, a bent wall portion (not shown) is provided at a partition wall 23 of the lower case 4 at a position right beside a valve seat 14 which is an air intake of the safety valve 10, and an electric blower of the safety valve chamber 8 is provided. On the side wall 8b on the chamber side, the inclined wall portion (not shown) of the partition wall 23 sloping when the upper lid 7 is closed.
And a skewed bent portion 30 that engages with the upper part of the airbag is provided, and the air intake lattice window 21 is provided in the bent portion 30.

Next, the operation of the embodiment configured as described above will be described. The obliquely bent portion 3 which engages with the upper portion of the obliquely bent wall portion of the partition wall 23 when the upper lid 7 provided on the side wall 8 b of the safety valve chamber 8 on the side of the electric blower room is closed.
Since the air intake lattice window 21 is provided in the safety valve room 8, the air intake lattice window 21 is provided in the safety valve chamber 8.
As a result, it faces obliquely to the valve seat 14 which is the air intake port of No. 0, and the air intake efficiency of the safety valve 10 is improved. Also,
Since the air intake lattice window 21 is provided in the obliquely bent portion 30 of the side wall 8b of the safety valve chamber 8 inside the vacuum cleaner provided below the upper lid 7, an object may hit the upper lid 7 or the like. Even if the external force is applied, the air intake lattice window 21 will not be damaged.

Further, the obliquely bent portion 30 provided on the side wall 8b of the safety valve chamber 8 on the side of the electric blower chamber is provided with an upper lid 7.
Is engaged with the upper part of the obliquely bent wall portion 23a of the partition wall 23 of the lower case 4 when the lid is closed. When a force to compress from the directions of arrows Fa and Fb, that is, from the left and right due to the atmospheric pressure, the compressive force acts on the side wall 8b of the safety valve chamber 8 on the side of the electric blower chamber to bend. The side wall 8b that is going to bend has a shape in which the obliquely bent portion 30 provided on the way is engaged with the upper portion of the bent wall portion of the partition wall 23, and is supported by the upper portion of the bent wall portion, Since the side wall span is substantially shortened, the shape holding force is increased with respect to the compressive force from the left and right of the upper lid 7, and deformation is less likely to occur. Therefore, when the inside of the dust collection chamber 2 is in a negative pressure state during the operation of the vacuum cleaner, the upper lid 7 moves the arrows Fa, Fb due to the atmospheric pressure.
The upper lid 7 is not deformed even if a force is applied to compress in the direction of the arrow, and no extra gap is formed at the joint between the upper lid 7 and the upper case 5 or between the upper lid 7 and the lower case 4. Flows into the dust collection chamber 2, the inside of the dust collection chamber 2 cannot be maintained at a negative pressure, and the problem of lowering the dust collection performance is solved.

Embodiment 3 FIG. FIG. 5 is a plan view showing the internal structure of a vacuum cleaner according to a third embodiment of the present invention with a part cut away, and FIG. 6 is a plan view showing the vacuum cleaner according to the embodiment with an upper lid removed. FIG. This embodiment can be called a modification of the second embodiment of the present invention. The valve seat 14 serving as the air intake of the safety valve 10 is provided on the partition wall 23 of the lower case 4.
A right-angled bent wall portion 23a is provided right next to the partition wall 23. The right-angled bent wall portion 23a of the partition wall 23 is connected to the side wall 8b of the safety valve chamber 8 on the side of the electric blower room when the upper lid 7 is closed. A right-angle bent portion 31 is provided, and the air intake lattice window 21 is provided in the bent portion 31. In this embodiment, since the air intake lattice window 21 faces the valve seat 14 which is the air intake of the safety valve 10 provided in the safety valve chamber 8, the air intake efficiency is lower than that of the second embodiment of the present invention. This is an improvement. Explanation of other actions is
The description is omitted because it is the same as the embodiment.

Embodiment 4 FIG. FIG. 7 is a side view showing the internal structure of a vacuum cleaner according to a fourth embodiment of the present invention by cutting out a part thereof, FIG. FIG. 9 is a plan view showing the internal structure of the vacuum cleaner with a portion cut away. Referring to FIG.
The same components as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and the description of the same components will be omitted. In this embodiment, a flexible filter upper pressing member 40 is integrally attached to a seal packing 4a provided above the partition wall 23 of the lower case 4. The filter upper holding member 40 is provided with a rectangular main body 41 and a filter 24 which hangs down from one side edge of the main body 41 and is provided on the dust collecting chamber side of the partition wall 23.
And a grip rib 43 projecting from the center of one side edge of the main body 41 toward the safety valve chamber 8.
And three air vent holes 44 provided at intervals in the main body 41, and the other side edge of the main body 41 is
Are integrally connected to the seal packing 4a on the upper side of the upper part.

Next, the operation of the embodiment configured as described above will be described. A pressing piece 42 provided on a side edge of the main body 41 of the filter upper pressing member 40 presses the filter 24 provided so as to cover the front surface of the grid-like central portion of the partition wall 23, and is provided on the main body 41. Three air vent holes 44
Among them, the air vent hole 44 in the middle passes air that has passed through the safety valve 10 of the safety valve chamber 8 and out of the air guide hole 8a to the filter 24.
The air vent holes 44 on both sides of the filter 2 filter the air passing through the upper part of the dust collecting chamber 2.
Guide to the front of 4. Also, a knob rib 4 provided on a side edge of the main body 41 of the filter upper pressing member 40 is provided.
3 protrudes toward the safety valve chamber 8, the paper bag 3 of the dust collection chamber 2 becomes full and enters the space formed between the filter upper holding member 40 and the safety valve chamber 8, and the air guide hole of the safety valve chamber 8 is formed. It prevents the passage of the air coming out of 8a and coming to the front of the filter 24 from being blocked, and guides the air coming out of the air guide hole 8a to come to the front of the filter 24. In addition, when replacing the filter, the picking rib 43 is picked up. By lifting the upper filter holding member 40 upward, the filter can be easily replaced without the upper filter holding member 40 being in the way.

Embodiment 5 FIG. FIG. 10 is a side view showing an internal structure of a vacuum cleaner according to a fifth embodiment of the present invention, with a portion cut away. This embodiment is a modification of the fifth embodiment of the present invention, in which a filter upper pressing member 40 is detachably attached to an upper portion of the filter pressing rib 25. The operation of this embodiment is the same as that of the fourth embodiment of the present invention except that the filter upper pressing member 40, which is a filter front pressing member, can be replaced.

[0026]

As described above, according to the present invention, the air intake lattice window is provided at a position near the air intake of the safety valve on the side wall on the electric blower room side of the safety valve room provided below the upper lid,
When the lid of the upper lid is closed, a slit-shaped air intake gap is formed between the butting edges of the upper lid and the upper case,
Since the air intake gap is slit-shaped and narrow, it is difficult for dirt and dust to enter the inside of the vacuum cleaner from the air intake gap when the vacuum cleaner is not used, and the paper bag in the dust collection chamber is full during the operation of the vacuum cleaner. Even when the air taken into the vacuum cleaner through the air intake gap is taken into the air intake lattice window, the air taken into the vacuum cleaner contains less dirt and dust, and the air enters the safety valve room. The entry of dust and dust is greatly reduced, and the entry of dust and dust into the safety valve is greatly reduced, so that the safety valve operates without any trouble. In addition, the air intake lattice window is provided on the wall of the safety valve room inside the vacuum cleaner provided below the upper lid, so even if an external force such as an object hits the upper lid, the air intake lattice window This has the effect that the window is not damaged.

Also, a sloping or right-angled bent wall portion is provided on the partition wall of the lower case near the air intake of the safety valve, and the side wall of the safety valve room on the side of the electric blower room when the lid of the upper cover is closed. Since the skewed or right-angled bent wall of the partition wall is provided with a skewed or right-angled bent portion to be engaged with the upper portion of the bent wall portion, and the bent portion is provided with a lattice window for an air intake, The lattice window for the air intake faces obliquely or faces the air intake which is one end of the safety valve provided in the safety valve chamber, and has an effect of improving the air intake efficiency of the safety valve. In addition, since the air intake lattice window is provided at the oblique or right-angled bent portion of the side wall of the safety valve chamber, which is the inside of the vacuum cleaner provided below the upper lid, the upper lid may be hit by an object. There is also an effect that the air intake lattice window is not damaged even when an external force is applied.

Further, the side wall on the side of the electric blower chamber of the safety valve chamber provided below the upper lid has a skewed or right-angled bent portion, and the bent portion of the lower case is closed when the upper lid is closed. Since it is engaged with the upper part of the sloping or right-angled bent wall of the partition wall, the dust collecting chamber is in a negative pressure state during the operation of the vacuum cleaner, and the upper lid is pressed by the atmospheric pressure in the directions of arrows Fa and Fb. In other words, when a compressive force is generated from the left and right, the compressive force acts on the side wall of the safety valve chamber on the side of the electric blower chamber to bend, but the side wall to be bent is provided in the middle. The skewed or right-angled bent part is engaged with the upper part of the bent wall part of the partition wall of the lower case, and is supported by the upper part of the bent wall part, and the side wall span is substantially shortened. In addition, the shape holding force increases against the compressive force from the left and right of the upper lid, Even when the vacuum chamber is under negative pressure during operation of the vacuum cleaner, no extra gap is created at the joint between the upper lid and the upper case or between the upper lid and the lower case, and air is collected from the gap. This has the effect that dust does not flow into the room and a reduction in dust collection performance can be prevented.

Further, a knob provided on a side edge of a main body portion of a filter upper holding member attached to an upper portion of a partition wall of the lower case or an upper portion of a filter front holding member erected on the lower case is provided in the safety valve chamber. The paper bag in the dust collection chamber fills and enters the space created between the filter upper holding member and the safety valve chamber, and flows out of the air guide hole in the safety valve chamber to the front of the filter. The filter prevents air from blocking the road and guides the air coming out of the air guide hole to the front of the filter.In addition, when replacing the filter, the user pulls the gripping rib and lifts the flexible filter upper holding member upward, thereby filtering the filter. This has the effect that the filter can be easily replaced without the upper holding member being in the way.

[Brief description of the drawings]

FIG. 1 is a plan view showing an internal structure of a vacuum cleaner according to a first embodiment of the present invention, with a portion cut away.

FIG. 2 is a front view showing the internal structure of the electric vacuum cleaner with a part cut away.

FIG. 3 is a side view showing the internal structure of the vacuum cleaner with a part cut away.

FIG. 4 is a plan view showing an internal structure of a vacuum cleaner according to a second embodiment of the present invention, with a portion cut away.

FIG. 5 is a plan view showing an internal structure of a vacuum cleaner according to a third embodiment of the present invention, with a portion cut away.

FIG. 6 is a plan view showing a state where an upper lid of the vacuum cleaner according to the embodiment is removed.

FIG. 7 is a side view showing an internal structure of a vacuum cleaner according to a fourth embodiment of the present invention, with a portion cut away.

FIG. 8 is a front view showing the internal structure of the vacuum cleaner with a part of the vacuum cleaner cut away.

FIG. 9 is a plan view showing the internal structure of the electric vacuum cleaner with a portion cut away.

FIG. 10 is a side view showing an internal structure of a vacuum cleaner according to a fifth embodiment of the present invention, with a portion cut away.

FIG. 11 is a plan view showing the internal structure of a conventional vacuum cleaner with a portion cut away.

FIG. 12 is a front view showing the internal structure of the electric vacuum cleaner with a portion cut away.

[Explanation of symbols]

1 electric blower, 2 dust collection chamber, 3 paper bags, 4 lower case, 5 upper case, 6 electric blower room, 7 upper lid, 8
Safety valve room, 8a Air guide hole, 9 Safety valve room lid, 10
Safety valve, 16 valve element, 17 coil spring, 21
Air intake lattice window.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takehiro Yamaguchi 1728 Koeda, Hanazono-cho, Osato-gun, Saitama 1 Inside Mitsubishi Electric Home Equipment Co., Ltd. 1 Mitsubishi Electric Home Equipment Co., Ltd. (56) References JP-A-4-327815 (JP, A) JP-A-61-2830 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) ) A47L 9/00 A47L 9/10

Claims (5)

(57) [Claims] 1. A cleaner main body comprising an electric blower and a dust collecting chamber communicating with the electric blower, and a partition wall covering an entire lower portion of the cleaner main body and separating the electric blower from the dust collecting chamber. A lower case, an upper case that covers an upper portion of the electric blower of the cleaner body and forms an electric blower chamber with a part of the lower case, and is rotatably attached to the upper case, and the lid is closed when the lid is closed. An upper lid that forms a dust collection chamber of the cleaner body with a part of the lower case; and an air guide hole that is provided below the upper lid and communicates with the dust collection chamber on a bottom wall. One end is connected to the air guide hole, and the other end is provided with a safety valve chamber having a safety valve closed by a valve body constantly biased by a spring. The sky provided near the intake An intake lattice window, and a slit-shaped air intake gap formed between abutting edges of the upper lid and the upper case when the lid is closed. Vacuum cleaner. 2. A sloping bent wall portion is provided in the partition wall of the lower case near the air intake of the safety valve, and the side wall of the safety valve chamber on the side of the electric blower room is closed when the lid is closed. 2. The vacuum cleaner according to claim 1, further comprising: a sloping bent portion that engages with the bent wall portion, and a lattice window for an air intake is provided in the bent portion. 3. A partition wall of the lower case is provided with a right-angled bent portion at a position near the air inlet of the safety valve, and a side wall of the safety valve room on the side of the electric blower room is bent when the lid is closed. 2. The vacuum cleaner according to claim 1, further comprising a right-angle bent portion that engages with an upper portion of the bent wall portion, and a lattice window for an air intake is provided in the bent portion. 4. A main body part having a partitioning wall of the lower case, a hanging piece for pressing an upper edge of a filter provided on the dust collecting chamber side of the partitioning wall, and a knob rib projecting toward the safety valve chamber. The vacuum cleaner according to any one of claims 1 to 3, further comprising a flexible filter upper pressing member having a plurality of air vent holes in a main body of the vacuum cleaner. 5. A filter front holding member which stands on the lower case and presses a front surface of a filter provided on the dust collecting chamber side of the partition wall, and is provided on the dust collecting chamber side of the partition wall. A flexible filter upper holding member that has a hanging holding piece that holds the upper edge of the filter and a knob rib that protrudes toward the safety valve chamber on the side edge of the main body and has a plurality of air vent holes in the main body. The vacuum cleaner according to any one of claims 1 to 3, wherein the vacuum cleaner is attached to a vacuum cleaner.