JPH07313412A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To increase the amount of dust which can be stored in a dust collection bag and to reduce the size of a cleaner main body by providing a dust collection bag compression plate which compresses the dust collected in the dust collection bag by pressing the dust collection bag from outside and a driving means which moves the dust collection bag compression plate. CONSTITUTION:The dust collection bag 12 is mounted detachably by a holder 11 in a dust collection chamber 10, the dust collection bag compression plate 13 having a slit cut is installed on the surface of the dust collection bag 12 on the side of a partition wall 2 almost in parallel to the partition wall 2, and the compression plate 13 is always energized by a compression spring 14 toward the front part of a main body case 1. When a motor-driven blower 21 is started while the dust collection bag compression plate 13 presses the dust collection bag 12 forward with a compression spring 14, air containing dust enters the dust collection bag 12 in the dust collection chamber 10 through a main body suction intake 15. The dust is accumulated in the dust collection bag 12, which is applied to expand with the wind pressure over the entire surface, thereby slanting the dust collection bag compression plate 13 toward the motor-driven blower 21. When the motor-driven blower 21 stops, the expanding force of the dust collection bag 12 ceases, so the dust in the dust collection bag 12 is compressed by the dust collection bag compression plate 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner which sucks dust by a suction force of an electric blower to collect the dust, and more particularly to an electric vacuum cleaner which compresses the collected dust to increase a dust collecting capacity. Regarding the vacuum cleaner.

[0002]

2. Description of the Related Art Generally, an electric vacuum cleaner is constructed to collect dust sucked from a suction port in a dust bag housed in a dust collection chamber. In this case, in order to facilitate the treatment of the collected dust, if dust is accumulated in the dust bag and the dust bag is clogged, set the electric vacuum cleaner to warm air circulation and raise the temperature of the electric blower. A technique has been proposed in which the heat-shrinkable member provided around the main body of the dust collecting bag is shrunk by the hot air to compress the dust in the dust collecting bag to reduce the size of the dust collecting bag so that the dust can be easily disposed of (Japanese Patent Laid-Open No. Hei 5- 146384).

[0003]

In the conventional vacuum cleaner, since the suction air of the electric blower passes through the dust collecting bag and spreads the dust collecting bag, the capacity of the dust collecting bag is irrespective of the amount of collected dust. It becomes almost constant. Therefore, in order to increase the dust collecting capacity, it is necessary to upsize the dust collecting bag. However, doing so has a disadvantage that the dust bag becomes bulky and it is not easy to take it out of the dust chamber.

Therefore, the above-mentioned conventional technique (Japanese Patent Laid-Open No. 5-1
No. 46384), the dust collection bag after dust collection is compressed by heat to reduce the bulk of the dust collection bag. However, even in this conventional technique, the amount of dust to be sucked is an amount determined by the capacity of the dust collecting bag, and the dust in the dust collecting bag is thermally compressed, miniaturized, and disposed.

Therefore, according to the present invention, the amount of dust that can be stored in the dust collecting bag is increased, and even if the volume of the dust collecting bag is reduced, the same amount of dust can be obtained as in the conventional case, and the vacuum cleaner main body is obtained. It is an object of the present invention to provide an electric vacuum cleaner that can be downsized.

[0006]

An electric vacuum cleaner according to claim 1, wherein an air intake port of a main body case is provided with a negative pressure generating portion composed of an electric blower and a dust collecting portion in which a dust collecting bag is housed. In an electric vacuum cleaner that connects a dust collection hose to the suction port and collects dust inside the dust bag with a negative pressure at the intake port, presses the dust bag from the outside and compresses the dust collected inside the bag. And a drive means for moving the dust bag compression plate.

According to a second aspect of the electric vacuum cleaner of the present invention, the driving means according to the first aspect of the present invention is a biasing means for constantly biasing the dust collecting bag compression plate in the direction of pressing the dust collecting bag.

In the electric vacuum cleaner according to claim 3, the drive means according to claim 1 transmits the rotation of the wheel mounted on the main body case to the dust collecting bag compression plate, and the dust collecting bag compression plate is used for the dust collecting bag. Is a transmission means for moving in the direction of pressing.

According to another aspect of the electric vacuum cleaner of the present invention, the driving means according to the first aspect transmits the rotation of the cord reel attached to the main body case to the dust collecting bag compression plate, and the dust collecting bag compression plate is wound by the cord. When collecting, move the dust bag in the direction of pressing,
It is a transmission means for moving the dust collecting bag in a direction to release the pressing force when the cord is pulled out.

According to a fifth aspect of the vacuum cleaner, when the drive means according to the first aspect of the present invention is energized, the dust-collecting bag compression plate is moved in a direction of pressing the dust-collecting bag, and the energization is released to collect the dust. The urging means is made of a shape memory alloy and returns the bag compression plate in the direction of releasing the pressing of the dust collecting bag.

According to a sixth aspect of the present invention, there is provided an electric vacuum cleaner comprising a limit switch which is driven by the drive means according to the fifth aspect when the amount of dust is increased and the volume of the dust bag is increased, and the shape is formed by driving the limit switch. The energizing means made of a memory alloy is energized for a certain period of time.

[0012]

In the electric vacuum cleaner according to claim 1, the dust collecting bag compression plate is moved by the driving means to press the dust collecting bag from the outside,
Compress the dust collected in the dust bag. By doing so, the amount of dust that can be collected in the dust collection bag is increased, and the size of the electric vacuum cleaner is further reduced.

In the electric vacuum cleaner according to the second aspect of the present invention, the dust bag compression plate is constantly urged by the urging means in the direction of pressing the dust bag, and the dust bag is pressed when the electric blower is stopped. Compress the dust inside. On the other hand, when the electric blower is operating, the negative pressure causes the dust bag compression plate to move in the direction in which the pressing of the dust bag is released against the biasing means, so that dust is collected in the dust bag.

In the vacuum cleaner of the third aspect, since the rotation of the wheels is transmitted to the dust collecting bag compression plate through the transmission mechanism, the direction in which the dust collecting bag compression plate presses the dust collecting bag when the wheels rotate. Move to and compress the dust inside.

In the vacuum cleaner of the fourth aspect, since the rotation of the cord reel is transmitted to the dust collecting bag compression plate through the transmission mechanism, when the cord reel rotates to pull out the cord at the start of use, the dust collecting bag is rotated. The compression plate moves in the direction to release the pressure on the dust bag, and dust can be collected inside the dust bag.When the cord reel rotates to wind the cord at the end of use, the dust bag compression plate The dust in the dust bag is compressed by moving in the direction of pressing the dust bag.

In the vacuum cleaner according to a fifth aspect of the present invention, when the user energizes the biasing means made of the shape memory alloy, the dust bag compression plate is moved in the direction in which the dust bag is pressed, and the energization is released. As a result, the dust collecting bag compression plate is returned in the direction in which the pressing of the dust collecting bag is released.

In the electric vacuum cleaner according to the sixth aspect, when the amount of collected dust increases and the volume of the dust collection bag increases, the limit switch installed in the dust collection chamber is driven to keep the shape memory alloy biasing means constant. By energizing the dust collection bag for a certain time, the dust collection bag compression plate is moved in a direction for pressing the dust collection bag for a certain period of time to compress the dust in the dust collection bag.

[0018]

1 is a plan view of the entire structure showing a first embodiment of the electric vacuum cleaner according to the present invention. In the electric vacuum cleaner according to the present embodiment, the interior of the electric vacuum cleaner body case 1 is divided into front and rear by a partition wall 2, and a dust collection chamber 10 having an upward opening is formed at a front portion (left side in the drawing). An electric blower chamber 20 is formed in the rear portion (on the right side of the drawing). The partition wall 2 is provided with a large number of grid-shaped communication holes 2a.

Inside the dust collecting chamber 10, a dust collecting bag 1 serving as a main dust collecting filter is provided by a holder 11 pivotally attached to the dust collecting chamber 10.
2 is detachably attached. Further, a dust collecting bag compression plate 13 having slits is installed on the surface of the dust collecting bag 12 on the side of the partition 2 substantially parallel to the partition 2. The compression plate 13 is constantly urged in the front direction of the main body case 1 by a pair of compression springs 14. This compression spring 14 is the dust bag compression plate 1
3 is a driving means for moving the same.

A main body intake port 15 that communicates with the outside of the main body case 1 is opened in front of the dust collection chamber 10. A shutter 16 that can be opened and closed is slidable at the opening of the main body intake port 15. The shutter 16 is movably supported, and a knob 16a is formed at the end of the shutter 16 so as to project upward.

An electric blower 21 is provided in the electric blower chamber 20.
Is installed. The electric blower 21 includes a fan (not shown), an electric motor 22 that rotationally drives the fan, a fan cover 23 that covers the fan, and the like. An intake port 23a is formed in the center of the fan cover 23, and an exhaust port (not shown) is formed in the frame of the electric motor 22.

The electric blower 21 has a front support wall 24 and a rear support frame 2 whose front and rear portions are formed in the electric blower chamber 20.
It is sandwiched by the rubber supports 26 and 27. The front support wall 24 and the rubber support 26 are annular, so that the intake port of the electric blower 21 is airtightly connected to the dust collection chamber 10 through the communication port 2a of the partition wall 2.

An exhaust chamber 30 is defined behind the electric blower chamber 20. An exhaust filter 31 is attached to the back surface of the exhaust chamber 30, and the electric blower 2 is attached to the outer rear surface portion of the main body case 1 via the exhaust filter 31.
A lattice-shaped exhaust port 32 communicating with one exhaust port is formed. In addition, a cord reel 40 is installed in the compartment adjacent to the electric blower chamber 20 and is configured to wind up the power cord 41. Although not shown, a warm air circulation passage that connects the exhaust side of the electric blower 21 to the dust collection chamber 10 is formed on the side surface inside the vacuum cleaner body case 1.

Next, the operation of the electric vacuum cleaner according to this embodiment will be described. Before the start of use of the electric vacuum cleaner, the dust collecting bag compression plate 13 is biased by the compression spring 14 in a direction of pressing the dust collecting bag 12 forward. When the electric blower 21 is started in this state, dust-containing air enters the dust collecting bag 12 in the dust collecting chamber 10 from the dust collecting hose (not shown) through the main body intake port 15. The air separated from the dust in the dust bag 12 and removed is passed through the slit of the dust bag compression plate 13 and the communication hole 2a of the partition wall 2 and is discharged from the electric blower 21 to the atmosphere through the exhaust port 32. It

The dust is accumulated in the dust collecting bag 12, but the dust collecting bag 12 is inflated by wind pressure on the entire surface due to the ventilation resistance passing therethrough. At this time, since the surfaces other than the surface on the compression bag 13 side of the dust collection chamber 10 are fixed around the dust collection chamber 10, the dust collection bag 12
Expands in a direction pushing the dust bag compression plate 13 toward the electric blower 21 side. The expansion force gradually becomes larger than the biasing force of the compression spring 14, and pushes the dust bag compression plate 13 toward the electric blower 21 side.

When the electric blower 21 is stopped after the cleaning, the expansion force of the dust bag 12 due to the wind pressure is released.
The dust bag 12 is pulled toward the main body intake port 15 side by the dust bag compression plate 13 urged by the compression spring 14 and contracts. Thereafter, by repeating the cleaning, the amount of dust increases and the dust bag 12 expands due to the dust, but the dust in the dust bag 12 is compressed by the operation of the compression spring 14 and the dust bag compression plate 13. Thus, every time the electric blower 21 is used and stopped, the accumulated dust is compressed, and the dust bag 1
Since the volume of dust in 2 is small, more dust can be collected even with the same volume of the dust bag 12 as compared with an electric vacuum cleaner that does not perform a compression operation.

Next, a second embodiment of the vacuum cleaner according to the present invention will be described. 2 and 3 are a side view and a plan view of a main part of the driving means according to this embodiment, and FIG. 4 is a partially enlarged view of FIG. The drive means according to the present embodiment is configured so that the dust collecting bag compression plate 13 is moved forward by the rotation of the driven rear wheel 50 of the vacuum cleaner, thereby pressing the dust collecting bag 12.

More specifically, a spur gear 51 installed in the lower rear portion of the compression plate 13 meshes with the driven rear wheel 50 via a gear mechanism in the gear box 52, and when the driven rear wheel 50 rotates, the spur gear 51 moves forward. It is configured so that the compression plate 13 moves to the front. Other configurations are the same as those of the electric vacuum cleaner (FIG. 1) described above.

The driven rear wheel 50 and the spur gear 51 are engaged with each other by the coupling 53 provided at one end of the axle portion of the driven rear wheel 50 and the coupling 55 provided at one end of the main gear 54, and the main gear 54 is further engaged. The gear 54 meshes with the secondary gears 56 and 57,
The secondary gear 57 meshes with the secondary gear 58, and the secondary gears 56, 58
Is performed by meshing with the spur gear 51.

The coupling 55 is constantly urged by a compression spring 59 in a direction in which it is meshed with the coupling 53, and the main gear 54 and the sub gears 56, 57 and 58 are held in the gear box 52. Of these, the secondary gears 56, 57
Is the slit 56a of the gearbox 52,
57b, and the axles of the slave gears 56 and 57 are urged upward by tension springs 60 and 61.

A groove 54a is formed in the main gear 54 between the main gear 54 and the coupling 55, and a lock pin 62 is attached to the main gear 54 by an expansion spring 63 whose one end is fixed to the gear box 52. It is urged downward and attached. Further, a lock release rib 64 for pushing up the lock pin 62 is provided behind the gear box 52, and a tension spring for urging the compression plate 13 toward the rear of the vacuum cleaner body case 1 is provided behind the spur gear 51. 6
5 are provided. The lock pin 62 is composed of a U-shaped member as shown in FIG. 5, and has a structure in which rod-shaped members 62b and 62c are vertically mounted inside an upper horizontal rod 62a.

Next, the operation of this embodiment will be described.
It should be noted that the dust bag 12 before the start of use is not pressed and will be described. The present embodiment is made by paying attention to moving the vacuum cleaner body case 1 because the cleaning surface is large when the user cleans the room.

First, when the user moves the electric vacuum cleaner body case 1 forward, the driven rear wheel 50 rotates counterclockwise in the direction of the solid arrow in FIG. As a result, the coupling 53 provided on the driven rear wheel 50 also rotates counterclockwise, and this rotation is transmitted to the main gear 54 via the coupling 55. Main gear 54
When is rotated counterclockwise, a force is exerted downward on the slave gear 56, and the slave gear 56 overcomes the urging force of the tension spring 60 and rotates clockwise, meshing with the spur gear 51 and collecting the spur gear 51 and the compression plate 13. The bag 12 is moved in the pressing direction. At this time, since the force pushed upward by the main gear 54 acts on the sub gear 57, it is pulled upward by the tension spring 61 and separated from the sub gear 58, so that the spur gear 51 is not driven.

On the contrary, when the driven rear wheel 50 is rotated rightward in the direction of the dotted arrow shown in the figure, that is, in the direction in which the vacuum cleaner body case 1 is retracted, the main gear 54 is rotated rightward via the couplings 53 and 55. Transmitted. As a result, the sub gear 57 is acted on by the main gear 54 to push downward, and the tension spring 6
The counterclockwise rotation overcomes the force of 1 and rotates counterclockwise, meshes with the spur gear 51 via the secondary gear 58, and moves the compression plate 13 in the direction of pressing the dust collecting bag 12. At this time, the sub gear 56 is the main gear 54
Since a force pushing upward is exerted by, the pulling spring 60 pulls it upward and does not drive the spur gear 51.

Thus, the compression plate 13 presses the dust collecting bag 12 by the rotation of the driven rear wheel 50, but when a large load is applied to the compression plate 13, the lock pin 62 causes the groove 54 of the main gear 54 to move.
Then, the driven rear wheel 50 and the main gear 54 are separated from each other. At this time, the lock release rib 64 is
The gearbox is moved to the left of 52 in the figure in accordance with the movement. As a result, the spur gear 51 is pulled back by the tension spring 65, so that the compression plate 13 pressing the dust bag 12 is also pulled back.

At this time, when the dust bag compression plate 13 returns to the rear of the cleaner body case 1, the lock release rib 64 on the left side of the gear box 52 moves to the right side of the drawing to push up the lock pin 62. Since the locked state of the main gear 54 is released, the dust collecting bag compression plate 13 operates in the direction of compressing the dust collecting bag 12 again. As described above, when the driven rear wheel 50 moves in either the front-back direction, the dust bag 12
Not only can it be compressed, but it can also be automatically decompressed.

Next, a third embodiment of the present invention will be described. The drive means of the present embodiment replaces the rotational force of the driven rear wheel 50 of the second embodiment described above with the cord reel 40.
It uses the rotational force of. That is, as shown in FIG. 6, a gear 40 a provided on the outer peripheral portion of the cord reel 40.
The coupling gear 42 meshes with the coupling gear 42, the coupling 53 provided at one end of the axle portion of the coupling gear 42 meshes with the coupling 55 provided at one end of the axle portion of the main gear 54, and the main gear 54 collects dust. It is configured to mesh with a spur gear 51 that moves the bag compression plate 13. The coupling 55 is urged by a compression spring 59 in the direction in which it engages with the coupling 53.

In this structure, when the user pulls out the power cord 41 from the cord reel 40 when starting cleaning, the cord reel 4 is pulled out as the cord 41 is pulled out.
0 rotates clockwise in the direction of the solid arrow in the figure. Then, since the coupling gear 42 meshes with the gear 40a provided on the outer peripheral portion of the reel of the cord reel 40, the coupling gear 42 starts rotating counterclockwise. As a result, the main gear 54 also rotates counterclockwise, so that the spur gear 51 and the compression plate 13 move to the rear of the vacuum cleaner body case 1.

At this time, if the compression plate 13 reaches the maximum rearward, the coupling gear 4 is formed as in the second embodiment.
The inclined engagement projections of 2 increase the axial force on the main gear 54, and the main gear 54 escapes in the axial direction against the compression spring 59, so that the spur gear 51 is not compressed.
Further, even when the cord 41 is further pulled out, the main gear 54 escapes from the coupling gear 42, so that the dust bag compression plate 13 is not further expanded.

Similarly, when a cord reel release button (not shown) is pressed to wind the cord reel 40 after using the vacuum cleaner, the cord reel 40 moves in the direction of the dotted arrow as the cord 41 is wound. Turn left. Then, since the coupling gear 42 meshes with the gear 40a provided on the outer peripheral portion of the reel of the cord reel 40, the coupling gear 42 starts to rotate clockwise. Since the main gear 54 also rotates rightward as the coupling gear 42 moves, the spur gear 51 and the compression plate 13 move forward so as to press the dust collecting bag 12.

At this time, when the dust bag 12 reaches the compression limit, the axial force on the main gear 54 increases due to the inclined meshing protrusions of the coupling gear 42, as in the case of the previous extension, and the main gear 54 becomes larger. Does not move the spur gear 51 further in the compression direction because it escapes in the axial direction against the compression spring 59. Further, even when the cord 41 is further wound up, the main gear 54 escapes from the coupling gear 42, so that the dust bag 12 is not pressed further.

Next, a fourth embodiment of the present invention will be described. In this embodiment, a spring 70 made of a shape memory alloy is used in place of the compression spring 14 in the first embodiment, and the dust bag 12 is pressed against the hand switch part on the suction hose (not shown). A switch for this is formed, and when the switch is turned on, the spring 70 made of a shape memory alloy is energized. Therefore, in this embodiment, the spring 70 made of a shape memory alloy and the means for energizing the spring 70 are the driving means. The other structure is the same as the structure shown in FIG.

FIG. 7 is an electric circuit diagram of this embodiment. An operation switch 72 and an electric blower 21 are connected in series to an AC power source 71, and a compression switch 73 for compressing the dust bag 12 in parallel with the electric blower 21 and a shape memory alloy spring 70 are connected in series. Has been done. Both ends of the shape memory alloy spring 70 are connected to metal terminals, one end is connected to the compression switch 73, and the other end is connected to the AC power supply 71.

The spring 70 made of the shape memory alloy is deformed so as to pull the compression plate 13 toward the front of the cleaner body case 1 to press the dust collecting bag 12 when the temperature is 60 ° C. or higher, and release the deformation at 40 ° C. or lower. Then, the dust bag compression plate 13 is pushed out to the rear of the cleaner body case 1 to act in the direction of expanding the dust bag 12.

Next, the operation of this embodiment will be described.
When the user feels that the dust collecting power has decreased due to an increase in dust, the compression switch 73 on the hand switch portion of the suction hose is pressed. Then, since the operation switch 72 has already been closed, a current flows through the spring 70, and due to its own internal resistance, heat is generated to 60 ° C. or more, pulling the compression plate 13 and contracting in the direction of pressing the dust collecting bag 12. When the pressing is finished and the user releases the compression switch 73, the energization of the spring 70 is released, and when the temperature of the shape memory alloy becomes 40 ° C. or less, the compression plate 13 is returned to the original position.

Next, a fifth embodiment of the present invention will be described. This embodiment is a modification of the fourth embodiment, and as shown in FIG. 8, a limit switch 75 is provided behind the dust bag compression plate 13. Therefore, in this embodiment, the spring 70 made of a shape memory alloy, the energizing means for the spring 70, and the limit switch 75 are the driving means. The other structure is the same as the structure shown in FIG.

FIG. 9 is an electric circuit diagram of this embodiment. In this circuit, an operation switch 72 and an electric blower 21 are connected in series to an AC power source 71, and a limit switch 75 and a shape memory alloy spring 7 are connected in parallel with the electric blower 21.
0 is connected in series, a relay contact 76c is connected in parallel with the limit switch 75, and a relay 76r is connected in parallel with the spring 70. The relay 76r drives the relay contact 76c to turn on / off. When energized, the relay contact 76c is turned on, but is released after 10 seconds.

In this structure, when the electric vacuum cleaner is operated and the amount of dust in the dust bag 12 increases and the volume of the dust bag 12 increases, the dust bag compression plate 13 retracts to the rear of the dust chamber 10. Then, the limit switch 75 is turned on. Then, since the operation switch 72 has already been turned on, the spring 70 made of the shape memory alloy and the relay 76r are energized. Then, the spring 70 made of shape memory alloy is 60 ° C. due to its internal resistance.
As the heat is generated as described above, the compression plate 13 is attracted and contracts in the direction in which the dust bag 12 is pressed.

When the compression plate 13 moves in the direction of compressing the dust bag 12, the contact of the limit switch 75 is turned off. However, when the relay 76r is energized, the relay contact 7
Since 6c is turned on, the spring 70 made of shape memory alloy remains energized. Since the relay 76r turns off the relay contact 76c 10 seconds after energization, the energization of the spring 70 is released after 10 seconds. As a result, when the temperature of the shape memory alloy becomes 40 ° C. or lower, the shape of the spring 70 is restored and the compression plate 13 is returned to the original position.

[0050]

According to the present invention, dust is collected every time the user uses the vacuum cleaner, every time the user operates a predetermined switch, or whenever the capacity of the dust bag increases. Since the bag compression plate presses the dust collecting bag from the outside to compress the dust collected inside, the amount of dust that can be collected can be increased. Further, even if the capacity of the dust collecting bag is halved, it is possible to secure the same amount of dust collecting as in the conventional case, so that the vacuum cleaner can be downsized.

Particularly, according to the electric vacuum cleaner of the second aspect, when the electric blower is stopped, the dust collecting bag is pressed from the outside by the simple means to compress the dust inside, thereby increasing the dust collecting amount. it can.

According to the third aspect of the vacuum cleaner, if the main body of the vacuum cleaner is moved during use, the dust bag is pressed from the outside to compress the dust inside, and the amount of dust collected is reduced. It is possible to increase.

Further, according to the electric vacuum cleaner of claim 4, the power cord is wound up at the end of use to press the dust collecting bag from the outside to compress the dust inside, thereby increasing the amount of dust collected. be able to.

According to the vacuum cleaner of the fifth aspect, the user arbitrarily controls the energization of the biasing means made of the shape memory alloy to press the dust collecting bag from the outside and the dust inside. Can be compressed to increase the amount of dust collection.

In this case, when the limit switch is turned on, the biasing means made of the shape memory alloy is automatically energized for a certain period of time so that the dust bag is kept for a certain period of time. It is possible to increase the amount of dust collection by pressing from the outside to compress the dust inside.

[Brief description of drawings]

FIG. 1 is a plan view of the entire structure showing a first embodiment of an electric vacuum cleaner according to the present invention.

FIG. 2 is a side view of a main portion of a driving unit showing a second embodiment of the present invention.

FIG. 3 is a plan view of FIG.

FIG. 4 is a partially enlarged view of FIG.

5 is a configuration diagram of the lock pin shown in FIG. 2. FIG.

FIG. 6 is a plan view of an essential part of a driving means showing a third embodiment of the present invention.

FIG. 7 is an electric circuit diagram showing a fourth embodiment of the present invention.

FIG. 8 is a plan view of an essential part of a driving means showing a fifth embodiment of the present invention.

9 is an electric circuit of the embodiment shown in FIG.

[Explanation of symbols]

 1 Vacuum Cleaner Main Body Case 10 Dust Collection Chamber 12 Dust Collection Bag 13 Dust Collection Bag Compression Plate 14 Compression Spring 20 Electric Blower Room 21 Electric Blower 40 Cord Reel 41 Power Cord 50 Driven Rear Wheel 51 Spur Gear 52 Gear Box 53, 55 Cup Ring 54 Main gear 56, 57, 58 Secondary gear 62 Lock pin 64 Lock release rib 70 Shape memory alloy spring 71 AC power supply 72 Operation switch 73 Compression switch 75 Limit switch 76c Relay contact 76r Relay

Claims (6)

[Claims] 1. A dust collecting hose is connected to an intake port of a main body case having a negative pressure generating unit composed of an electric blower and a dust collecting unit having a dust collecting bag housed therein, and the negative pressure is applied to the intake port. In a vacuum cleaner that collects dust in the dust bag as a state, a dust bag compression plate that presses the dust bag from the outside to compress the dust collected in the dust bag, and An electric vacuum cleaner, comprising: a drive means for moving the dust bag compression plate. 2. The driving means is a biasing means for constantly biasing the dust collecting bag compression plate in a direction of pressing the dust collecting bag, and the dust collecting bag compression plate is negative when the electric blower operates. The electric vacuum cleaner according to claim 1, wherein the vacuum cleaner moves in a direction in which the pressing of the dust collecting bag is released against the biasing means by pressure. 3. The transmission means transmits the rotation of a wheel attached to the main body case to the dust bag compression plate, and moves the dust bag compression plate in a direction of pressing the dust bag. The vacuum cleaner according to claim 1, which is a means. 4. The drive means transmits the rotation of a cord reel attached to the main body case to the dust collecting bag compression plate, and presses the dust collecting bag compression plate against the dust collecting bag when the cord is wound up. 2. The electric vacuum cleaner according to claim 1, further comprising a transmitting unit that moves the dust collecting bag compression plate in a direction to release the pressing of the dust collecting bag when the cord is pulled out. 5. The drive means moves the dust-collection bag compression plate in a direction of pressing the dust-collection bag by energizing, and releases the energization to move the dust-collection bag compression plate to the dust-collecting bag. The electric vacuum cleaner according to claim 1, wherein the electric vacuum cleaner is a biasing means made of a shape memory alloy that returns the pressing force in the direction of releasing the pressing force. 6. The drive means includes a limit switch that is driven when the amount of collected dust increases and the volume of the dust bag increases, and the urging means made of the shape memory alloy is driven by driving the limit switch. The electric vacuum cleaner according to claim 5, wherein the electric power is supplied for a certain period of time.