JPH0374094B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a vacuum cleaner, and particularly to an exhaust section in a handy-type vacuum cleaner equipped with a DC electric blower driven by a battery.

(Prior Art) Conventionally, in this type of handy type vacuum cleaner, as described in, for example, Japanese Utility Model Application Publication No. 51-13169 and Japanese Patent Application Publication No. 54-70652,
A DC electric blower and a battery for driving the DC electric blower are disposed on the inside rear side of the vacuum cleaner body, and a handle is integrally provided with the vacuum cleaner body above the battery. An exhaust hole for discharging the exhaust air from the electric blower to the outside of the vacuum cleaner body is formed in the rear surface of the cleaner body, and the battery communicates with an exhaust air passage from the electric blower to the exhaust hole. The structure is such that it is placed in a space with a large space.

(Problems to be Solved by the Invention) In the conventional structure described above, since the battery is located in a space communicating with the exhaust air passage, fine dust contained in the exhaust air may be exposed to the battery electrodes or the There was a problem in that it adhered to the contacts connected to the electrodes, reducing the contact between these electrodes and the contacts.

Furthermore, if the exhaust hole is opposed to the exhaust side of the electric blower as in the structure described in the above-mentioned Japanese Utility Model Publication No. 51-13169, the sound accompanying the drive of the electric blower will be directly emitted from the exhaust hole. There was a problem in that the noise became louder as it was transmitted to the outside.

Furthermore, as described in JP-A No. 58-183129, for example, in a structure with a cylindrical handle, exhaust air leaks from a small gap in the handle, and when cleaning by gripping the handle, However, there was a problem in that the leaked exhaust air hit the hands, causing discomfort.

The present invention prevents extremely fine dust from the exhaust air, which is characteristic of vacuum cleaners, from adhering to the electrodes of the battery that drives the DC electric blower and the contacts connected to these electrodes. In a vacuum cleaner that prevents unstable contact, the contact rib that holds down the battery smoothes the flow of exhaust air and reduces noise, and the contact rib is positioned above the battery. This means that there is little leakage of exhaust air to the handle provided on the main body of the vacuum cleaner, and when cleaning by gripping the handle, the exhaust air that leaks out does not hit your hands, making it possible to clean comfortably. This is to provide a vacuum cleaner that can.

(Means for Solving the Problems) The vacuum cleaner of the present invention includes a DC electric blower, a secondary battery for driving the DC electric blower, and a charging circuit for charging the secondary battery. A vacuum cleaner body is provided with a handle located above the secondary battery and an exhaust hole on the outside that communicates with the DC electric blower. are arranged in a line in this order to form a partition wall surrounding the secondary battery and the contacts connected to the electrodes of the secondary battery, a space is provided below the partition wall, and this space is An exhaust air path that communicates the exhaust side of the DC electric blower with the exhaust hole, an opening for inserting and removing a secondary battery at the rear of the vacuum cleaner body, and a lid for opening and closing this opening. The exhaust hole is provided on the inner surface side of the lid body, and the exhaust hole is surrounded except for the lower part, and when the lid body is attached, the exhaust hole is provided, and when the lid body is attached, the exhaust hole is in contact with the secondary battery, and the exhaust air path, the exhaust hole, and other parts inside the vacuum cleaner body are surrounded by the exhaust hole. This is provided with an abutment rib that blocks the space between the

(Function) In the vacuum cleaner of the present invention, when the DC electric blower is driven by the secondary battery, the exhaust air from the electric blower is directed to the secondary battery and its electrodes through the partition wall formed surrounding the secondary battery. By passing through the exhaust air path formed in the space inside the vacuum cleaner body that is cut off from the contacts to be joined, the air is discharged from the exhaust hole located between the secondary battery and the electric blower. This prevents fine dust contained in the exhaust air from adhering to the battery electrodes and contacts, preventing unstable contact between the battery electrodes and contacts, and ensuring that the exhaust air path of the electric blower is on the exhaust side of the electric blower. Since the electric blower is not directly opposed to the electric blower, the noise caused by driving the electric blower is prevented from directly leaking into the exhaust hole, thereby reducing noise. In addition, by closing the opening for inserting and removing the secondary battery with the lid, the abutting ribs on the lid suppress the battery and guide the exhaust air, making the flow of exhaust air smoother and reducing exhaust noise. be done.

Furthermore, the exhaust air from the DC electric blower is discharged when the opening for inserting and removing the secondary battery is closed with the lid.
A contact rib provided on the inner surface of the exhaust hole surrounding the exhaust hole except for the lower part contacts the secondary battery and blocks the exhaust air passage and the exhaust hole from other spaces inside the vacuum cleaner body. This prevents the exhaust air from leaking to the handle located above the secondary battery and provided on the vacuum cleaner body, without the need for special leakage prevention means. Usability is improved. Additionally, the abutting ribs on the lid prevent noise from leaking upward.

(Embodiment) The structure of an embodiment of the vacuum cleaner of the present invention will be described with reference to FIGS. 1 to 7.

Reference numeral 1 denotes a vacuum cleaner body, which is formed into a substantially cylindrical shape having a front end opening 2 and a rear end opening 3. The vacuum cleaner main body 1 is formed by dividing a right main body case member 4 and a left main body case member 5 into left and right halves, each having a semi-cylindrical shape, and joining them with a plurality of screws 6 by butting their side openings together. It is structured as follows. Further, a cylindrical handle 7 is provided on the rear upper side of the main body 1 of the vacuum cleaner.
The handle 7 includes a front rising part 8 extending upward from the center of the upper surface of the cleaner main body 1, and a front rising part 8 extending rearward from the upper part of the rear surface of the rising part 8, with the rear part extending downward. It consists of a grip part 9 that curves toward the rear end of the upper surface of the cleaner body 1. A blocking wall 10 is formed at the lower end of the rising portion 8, and the blocking wall 10 blocks the interior of the rising portion 8 from the space within the cleaner body 1 below it.

Further, inside the vacuum cleaner main body 1, the handle 7
It is partitioned into the front and rear by a partition wall 12 formed at a position corresponding to the front surface and having a communication hole 11 as an opening.
The front side of this partition wall 12 is a dust collection chamber 13.

Further, a DC electric blower 16 is disposed within the cleaner body 1 behind the partition wall 12. That is, this DC electric blower 16 consists of a motor main body 17 and a fan 18 rotated by the motor main body 17, and an elastic holder 19 formed of synthetic rubber or the like and having an approximately L-shaped cross section and an annular shape.
The front end of the motor main body 17 is fixed to the center of a substantially disc-shaped rectifying plate 20 supported by the vacuum cleaner main body 1 through the fan 1.
8 is supported facing the partition wall 12. Further, the baffle plate 20 has a flow hole (not shown) formed therein, and a diffuser rib 22 that faces the outer circumferential surface of the fan 18 and has a function of diffusing the airflow is protrudingly formed on the outer peripheral edge. ing.

Further, located behind the electric blower 16 and inside the vacuum cleaner body 1, there is formed a battery storage section 26 whose side surface is approximately U-shaped and whose rear surface is open at least. , its both side edges and upper edge form a partition wall 27 connected to both side surfaces and the top surface of the vacuum cleaner main body 1, and the space near the battery storage section 26 in the vacuum cleaner main body 1 is vertically separated by this partition wall 27. The space below the partition wall 27 forms part of an exhaust air path 28 extending from the electric blower 16 to the rear end opening 3 of the cleaner body 1.

Reference numeral 29 denotes a secondary battery, such as a lead-acid battery, which is removably inserted into the battery storage portion 26 through the rear end opening 3. A pair of electrodes 30a and 30b are provided on one side of the lead-acid battery 29. ing. Further, as shown in FIG. 2, the vacuum cleaner main body 1 is provided with a pair of contact plates 31 that serve as leaf spring-like contacts that are connected to the electrodes 30a and 30b of the lead-acid battery 29 so as to be able to freely connect and separate. These contact plates 31 are
It is located above the lower surface of the partition wall 27.

Reference numeral 36 denotes a lid body that is attached to and detached from the rear end opening 3 of the vacuum cleaner main body 1 to open and close this opening 3. As shown in FIG. A lattice-shaped exhaust hole 37 is formed in the shape of an arc. In addition, this lid body 36
The inner surface of the battery 29 surrounds the exhaust hole 37 except for the lower part and is in contact with the rear surface of the battery 29.
A three-pronged abutment rib 38 is formed in a protruding manner to support the cylindrical member 9 . Furthermore, an engaging protrusion 39 is formed at an appropriate location on the peripheral edge of the lid body 36 so as to protrude inwardly, and this engaging protrusion 39 is located on the outer circumferential side of the rear end opening 3 of the vacuum cleaner main body 1. An engagement recess 40 formed in
The lid 36 is attached to the cleaner body 1 by being engaged with the lid 36 .

Further, in the vacuum cleaner main body 1, a partition wall 27
Resistors 47 and 48 for changing the suction force of the electric blower 16 are provided below the lower front side of the electric blower 16 .

Further, in the handle 7 of the vacuum cleaner main body 1, a switch 51 for controlling the electric blower 16 is provided on the inside front side of the grip part 9,
A knob 52 for operating the switch 51 is attached to the switch 51 so as to be slidable in the front-rear direction. And, in this knob body 52,
An operating section 5 protrudes from the top surface of the grip section 9 on its top surface.
3 are formed, and a plate-shaped display part 54 and opening/closing part 55 (not shown in FIG. ) are each formed integrally.

A display hole 56 is formed in the upper surface of the rising portion 8 facing the display portion 54, and a display hole 56 is formed in the display portion 54 to face the display hole 56 as the knob 52 slides. Electric blower 1
A display (not shown) indicating the control state of No. 6 is provided. Further, a through hole 57 is formed in the side surface of the rising portion 8 facing the opening/closing portion 55 , and this through hole 57 allows a knob 52 provided on the switch 51 to stop the electric blower 16 . It is opened when it is in the driving position, and closed by the opening/closing part 55 when it is in the driving position.

Further, a jack 60 to which a plug 59 of a charging adapter 58 is connected is supported by a screw 61 and continues inside the rising portion 8 facing the through hole 57 . Further, inside the rising portion 8, the jack 60 and the lead acid battery 29 are provided.
A charging circuit board 63 is provided with a charging circuit 62 for charging the lead-acid battery 29, and a light emitting element 64 such as a light emitting diode for displaying the state of charge is provided.

Further, on the peripheral edge of the front end opening 2 of the vacuum cleaner body 1, a closing body storage part 71 with an open front face is provided at an appropriate location, and a cross-sectional path L
A packing holding portion 72 having a circular shape is formed, and a packing 73 formed of synthetic rubber or the like and having substantially the same shape as the holding portion 72 is fitted and held in the packing holding portion 72 . Further, a closure body 75 is provided in the closure body storage portion 71 and is urged forward by a spring 74 so as to be freely retractable from the front opening of the storage portion 71 . The enlarged diameter portion 76 formed at the rear end of the closure body 75 comes into contact with the protrusion 77 formed at the inner circumferential edge of the front opening of the closure body storage portion 71. It is stopped from falling out. Further, a projecting piece 78 is formed on the front peripheral edge of the vacuum cleaner main body 1, located in front of the closing body storage section 71, and
At a position of this projecting piece 78 facing the outer diameter side of the storage portion 71, there is a locked protrusion 79 that projects in the outer diameter direction.
is formed, and this locked protrusion 79
The rear part thereof is cut out to form a locked groove part 80, and the closing body 75 opens and closes this locked groove part 80 as the closing body 75 moves in and out.

Reference numeral 81 denotes a suction lid for opening and closing the front end opening 2 of the vacuum cleaner main body 1, and is formed in a substantially hemispherical shape.
This suction lid body 81 is formed with a substantially cylindrical suction port 82 that extends slightly backward from its rear surface, and a valve body formed of synthetic rubber or the like is provided on the rear surface of this suction port 82. 83 is provided so as to be openable and closable toward the rear, and this valve body 83
The suction port 82 is opened and closed by. Further, a cylindrical support rib 84 is formed on the suction lid 81 so as to surround the suction port 82 and whose rear end is located on substantially the same plane as the rear end of the lid 81 .

Furthermore, an annular ring body 85 is provided at the rear end of the suction lid 81, and a holding protrusion 86 formed at the front edge of the ring body 85 is fitted into a holding groove 87 formed in the suction lid 81. It is attached so that it can rotate freely. A locking protrusion 88 that is engaged with the locking groove 80 of the cleaner main body 1 is formed on the rear edge of the ring body 85 so as to protrude in the inner diameter direction.

Reference numeral 91 denotes a dust collection filter that is detachably installed in the dust collection chamber 13 of the vacuum cleaner body 1, and is connected to the dust collection port 9.
It consists of a mouth frame 93 having an opening formed at 2, and a bag-like leakage material 94 having an opening edge joined to the mouth frame 93 surrounding the dust collection port 92.

A hanger 95 for hanging the vacuum cleaner main body 1 on a hook provided on a wall or the like is rotatably provided at the rear end of the lower surface of the vacuum cleaner main body 1.

Next, the configuration of the charging circuit 62 will be explained with reference to FIG.

The first thyristor 101 has an anode connected to the + side terminal 60a of the jack 60, and a cathode connected to the + side electrode 30a of the lead acid battery 29 via a diode 102 in the forward direction. The negative electrode 30b of the battery 29 is connected to the negative terminal 60b of the jack 60. A charging current control resistor 103 is connected in parallel with the first thyristor 101. Also, this first thyristor 101
The anode side of is connected to the gate of the first thyristor 101 via a forward diode 104, resistors 105 and 106, and a forward diode 107. Note that a resistor 108 is connected between the gate side and the cathode side of the first thyristor 101.

Further, the display circuit 109 is configured by connecting a Zener diode 110, a resistor 111, and the light emitting element 64 in series, and one end is connected to the midpoint between the resistors 105 and 106. Also, the other end is the -
Connect to the side terminal 60b. Therefore, resistance 10
The midpoint potential of 5,106 is Zener diode 1
When the voltage exceeds the voltage determined by 10, conduction occurs and the light emitting element 64 emits light to indicate that it is being charged.

The charging end detection circuit 112 also includes a Zener diode 113 and a resistor 114 provided in series with the cathode side circuit of the first thyristor 101 and a resistor 116 provided between the anode of the Zener diode 113 and the second thyristor 115. and a capacitor 117 provided between the gate and cathode of the second thyristor 115, and when the battery 29 is fully charged, the first thyristor 10
The first cathode side electric circuit becomes conductive due to the rise in potential, and the gate of the second thyristor 115 is energized.

The second thyristor 115 is connected to the gate circuit of the first thyristor 101 and the negative terminal 6 of the jack 60.
0b, the charging end detection circuit 1
The gate is turned on by being energized by the output of 12.

A smoothing capacitor 118 supplies direct current to the second thyristor 115 and the display circuit 109.

Further, a power supply circuit 121 that serves as a power source for this charging circuit 62 is provided in the charging adapter 58. That is, as shown in FIG. 9, this power supply circuit 121 has a transformer 123 whose primary winding is connected to a power plug 122 connected to an AC power supply, and a diode 124 is connected to both ends of the secondary winding. ,125
the anode is connected. The cathodes of these diodes 124, 125 are connected to the + side terminal 59a of the plug 59 of the charging adapter 58, which is connected to the + side terminal 60a of the jack 60 of the vacuum cleaner main body 1, and are also connected to the + side terminal 59a of the plug 59 of the charging adapter 58. The midpoint of the winding is connected to the negative terminal 59b of the plug 59, which is connected to the negative terminal 60b of the jack 60.

Further, the electric blower 16 and the switch 51 are connected in series to the lead acid battery 29 to form a discharge circuit 126 . The switch 51 has four contacts 51 that can be selectively switched.
a, 51b, 51c, and 51d, the electric blower 16 and the battery 29 are short-circuited at the contact 51a, and both 16 and 29 are connected to the resistor 4 at the contact 51b.
7, and at the contact 51c, both 16,
29 are connected sequentially through two resistors 47 and 48, and the discharge circuit 126 is opened at the contact 51d. That is, the switch 51 allows the suction force of the electric blower 16 to be switched to four levels including a stopped state.

Next, the operation of this embodiment will be explained.

When cleaning, a dust collection filter 91 is installed in the dust collection chamber 13. Dust collection filter 9
1, the bag-like leak material 94 is inserted through the front end opening 2 of the cleaner body 1, and then the suction lid 81 is attached to this opening 2. Suction lid body 81
To install, press the rear face against the front end opening 2. In this state, the suction port 82 of the suction lid 81
The rear end portion is inserted into the dust suction port 92 of the dust collection filter 91, and the support rib 84 of the suction lid 81 is pressed against the mouth frame 93 of the dust collection filter 91, and this mouth frame 93 is inserted into the dust suction port 92 of the dust collection filter 91. It is brought into contact with the front surface of the main body 1. Accordingly, when the packing 73 of the vacuum cleaner main body 1 is brought into airtight contact with the mouth frame 93, the pressed portion 75 of the closing body 75 provided in the vacuum cleaner main body 1
a is pressed by the mouth frame 93 and sinks into the obturator storage part 71, and the locked groove part 80 of the cleaner main body 1 is opened. Next, when the ring body 85 of the suction lid body 81 is rotated, the locking protrusion 88 engages with the locked groove portion 8.
0, the suction lid 81 is attached to the cleaner body 1.

At this time, the spout frame 93 is pressed and supported by the support ribs 84 of the suction lid body 81, and deformation of the spout frame 93 is prevented, so the strength of the spout frame 93 does not need to be very strong. The dust collecting filter 91 can be made inexpensive, and the closing body 75 pressed against the mouth frame 93 is reliably inserted into the storage part 71, so that the closing body 75 does not get in the way when the suction lid body 81 is attached.

When the dust filter 91 is not attached, the closing body 75, which is biased forward by the spring 74, protrudes from the storage portion 71 and locks into the locked groove portion 8.
0 is closed, so in this state, the suction lid 8
Even if you try to attach the locking protrusion 88 to the blocker 7
5, it is not engaged with the locked groove 80 and the suction lid 81 cannot be attached. Therefore, forgetting to attach the dust collection filter 91 can be prevented.

At this time, the locked groove portion 80 is closed by the closing body 75.
is closed, and the suction lid 81 is inserted into this locked groove 80.
Since the locking protrusion 88 of is made impossible to engage,
The closure body 75 may be small and its movement amount may be small. Moreover, the closing body 75 is held in the storage part 71, and the locking protrusion of the suction lid 81 is applied to the closing body 75, which is biased forward by the spring 74, from a direction perpendicular to the sliding direction of the closing body 75. 88 is correct, so
It is possible to reliably prevent the locking protrusion 88 from engaging with the locking groove 80, and to avoid applying unreasonable force to the closing body 75. Moreover, the suction cover 81 does not rotate as a whole, but is installed on the suction lid 81. Since the ring body 85 rotates, the load applied to the closure body 75 when the locking protrusion 88 provided on the ring body 85 hits is small, and therefore the closure body 75 is small. Anything is fine.

Cleaning is performed, for example, with the extension pipe 131 and the suction port body 132 connected to the suction port 82 in a detachable manner.

The dust sucked in from the suction port body 132 along with the suction airflow is transferred to the vacuum cleaner body 1 via the extension pipe 131.
The dust is guided to the dust collection chamber 13 and stored in the dust collection filter 91. At this time, since the rear end of the suction port 82 is inserted into the dust collection filter 91,
When the valve body 83 of the suction port 82 opens due to wind pressure, the mouth frame 93 does not get in the way, so the valve body 83 may be in the form of a flat plate, and the valve body 83 can be made inexpensive.

On the other hand, the airflow that has passed through the dust collection filter 91 is
An exhaust air passage 28 is defined from the exhaust side of the electric blower 16 to the lower part of the cleaner body 1 by a partition wall 27.
It is discharged from the exhaust hole 37 via the exhaust hole 37.

At that time, the exhaust air passage 28 through which the exhaust air passes is connected to the partition wall 2.
7, the lead-acid battery 29 and its electrodes 30a, 3
Since the electrodes 30a, 30b and the contact plate 31 are cut off from the contact plate 31, which is joined to the contact plate 31, fine dust in the exhaust air does not adhere to the electrodes 30a, 30b and the contact plate 31, so that they can be freely connected and separated. electrodes 30a, 3
The contact between 0b and the contact plate 31 will not deteriorate.

In addition to providing such a partition wall 27, a contact rib 38 is provided on the lid body 36 having the exhaust hole 37, which surrounds the exhaust hole 37 except for the lower part and comes into contact with the rear surface of the battery 29. is provided, and this contact rib 3
8 blocks the exhaust air passage 28 and the exhaust hole 37 from other spaces inside the cleaner body 1.
Almost no exhaust air leaks to the handle 7 provided above the battery 29, and the leaked exhaust air does not hit the hands, so cleaning can be carried out comfortably by gripping the handle 7.

Further, a lead acid battery 29 is located between the electric blower 16 and the exhaust hole 37, and the exhaust air passage 28 from the electric blower 16 to the exhaust hole 37 is connected to the lead acid battery 29.
Since the exhaust side of the electric blower 16 does not directly face the exhaust hole 37, the electric blower 1
The sound accompanying the drive of the cleaning device 6 is difficult to be directly transmitted to the exhaust hole 37, and therefore the noise during cleaning can be reduced.

Further, the exhaust air coming out from the lower surface of the partition wall 27 is discharged from the exhaust hole 37 while being diffused generally in the vertical direction, but since the exhaust hole 37 is shaped to extend in the vertical direction, the exhaust air is discharged from the exhaust hole 37. The resistance when passing through the air blower 37 becomes small, and therefore, it is possible to prevent the suction performance of the electric blower 16 from deteriorating due to resistance of the exhaust air.

Further, the electric blower 16 is controlled by a switch 51.
This is done by operating a knob 52 provided at the
9 is passed through resistors 47 and 48 to electric blower 16 to change its suction force.
By the way, since a large current of about 10 A flows through the resistors 47 and 48, these resistors 47 and 48 generate considerable heat. However, the resistor 47,
48 is a lower exhaust air passage 2 on the lower front side of the partition wall 27.
8, the cross-sectional area is the smallest, i.e., the part where the volume of exhaust air passing through the unit area is maximum.
8, these resistors 47 and 48 can be efficiently cooled. Therefore, the resistors 47 and 48 can have small volumes, so that the vacuum cleaner main body 1 can be made smaller and lighter.

Note that, as shown in FIG. 10, the front surface of the partition wall 27 may be an inclined surface 27a that descends toward the rear. With this structure, the exhaust air discharged from the electric blower 16 is guided by the inclined surface 27a and smoothly flows into the lower surface side of the partition wall 27, so that it is possible to prevent a decrease in the suction capacity of the electric blower 16 due to turbulence of the exhaust air. At the same time, the cooling effect of the resistors 47 and 48 disposed below the lower front side of the partition wall 27 can be further enhanced.

To discard the dust collecting filter 91 with accumulated dust after cleaning, first rotate the ring body 85 of the suction lid body 81 so that its locking protrusion 88 and the locking groove portion 80 of the vacuum cleaner body 1 are connected. The suction lid body 81 is removed by releasing the engagement. Next, the mouth frame 93 of the dust collecting filter 91 is pulled out from the front end opening 2 of the vacuum cleaner body 1 by pinching the mouth frame 93 of the dust collecting filter 91. Since the dust collecting filter 91 is pushed forward by the body 75, the dust collecting filter 91 can be easily pulled out. Further, as described above, the suction port 82 of the suction lid body 81
is the dust collection filter 9 from the dust collection port 92 of the opening frame 93.
Since the dust collecting filter 91 is slightly inserted into the mouth frame 93, there is no possibility of dust spilling or adhering to the outer surface of the opening frame 93, and the dust collecting filter 91 can be handled hygienically.

Then, when charging the lead acid battery 29,
The charging adapter 5 has the power plug 122 connected to an AC power source while the electric blower 16 is stopped.
The plug 59 of No. 8 is connected to a jack 60 connected to a charging circuit 62 through the through hole 57 of the cleaner body 1.

Here, the operation of the charging circuit 62 will be explained.

The charging power supply circuit 121 generates pulsating output on its + and - side circuits, but on the cathode side of the diode 104, it is smoothed by the capacitor 118 and becomes a DC power source.

Now, if the voltage of the battery 29 has dropped to the point where it requires charging, in this case the second thyristor 11
Since 5 is in the off state, the gate potential of the first thyristor 101 is higher than the cathode potential. Therefore, the first thyristor 101 is turned on,
The pulsating output generated from the power supply circuit 121 is supplied to the battery 29 via the diode 102 to charge it. At this time, a sufficiently high voltage is generated at the midpoint between the resistors 105 and 106 leading to the gate of the first thyristor 101, so the light emitting element 64 lights up to indicate that charging is in progress.

When the above-mentioned charging is completed, the voltage of the battery 29 rises rapidly, and the first thyristor 101
The potential on the cathode side also rises rapidly. Therefore, the charging end detection circuit 112 detects this and turns on the second thyristor 115. Therefore, the gate potential of the first thyristor 101 through which the pulsating current is flowing decreases and becomes lower than the cathode potential, so that it is turned off and charging is completed. Also, at this time, the midpoint potential between resistors 105 and 106 also decreases,
Since the Zener voltage becomes lower than the Zener voltage of the Zener diode 110, the light emitting element 64 turns off and the charging display ends.

〔Effect of the invention〕

According to the present invention, an exhaust hole is provided in a lid body that opens and closes an opening formed in a vacuum cleaner body in order to attach and detach a secondary battery, and the exhaust hole is surrounded on the inner surface side of the lid body except for the lower part. We have provided a contact rib that contacts the secondary battery and blocks the exhaust air passage and exhaust hole from other spaces inside the vacuum cleaner body, so this contact rib can hold the battery and also prevent the exhaust air from flowing. The exhaust air is guided to smooth the flow of exhaust air and reduce exhaust noise.In addition to the fact that the exhaust air path is blocked below the secondary battery, the lid that suppresses the battery allows the exhaust air to flow smoothly and reduce exhaust noise. The vacuum cleaner is located in a vacuum cleaner where there is almost no leakage of exhaust air to the handle provided on the main body of the vacuum cleaner, and there is no need to consider special leakage prevention measures to prevent air from leaking to the handle side. This allows you to comfortably clean by holding the handle. In addition, within the vacuum cleaner body, a DC electric blower, a secondary battery, and an exhaust hole are arranged in this order in a line, and a partition wall is formed by surrounding the secondary battery and the contacts connected to its electrodes. A space is provided below the partition wall, and this space is used as an exhaust air path that communicates the electric blower with the exhaust hole, so that extremely fine dust contained in the exhaust air unique to vacuum cleaners can be removed from the electrodes of the secondary battery. It does not adhere to the electrodes or the contacts, and the contact between these electrodes and the contacts does not become unstable. Furthermore, the noise generated when the electric blower is driven is less likely to leak from the exhaust hole, reducing noise during cleaning.

[Brief explanation of drawings]

FIG. 1 is a vertical side view showing one embodiment of the vacuum cleaner of the present invention, FIG. 2 is a cross-sectional plan view of the same, FIG. 3 is a vertical side view of the rear part with the upper lid removed, and FIG.
The figure is a perspective view of the upper lid from the front, Figure 5 is a perspective view of the upper lid from the rear, Figure 6 is a perspective view of the vicinity of the front end opening, and Figure 7 is a view of the charging adapter and handle. 8 is a circuit diagram of the charging circuit as above, FIG. 9 is a circuit diagram of a power supply circuit for the charging circuit as above, and FIG. 10 is a vacuum cleaner main body showing another embodiment of the present invention. It is a longitudinal side view of the rear part. DESCRIPTION OF SYMBOLS 1... Vacuum cleaner body, 3... Opening, 7... Handle, 16... DC electric blower, 27... Partition wall, 2
8... Exhaust air path, 29... Lead storage battery as a secondary battery, 30a, 30b... Electrode, 31... Contact plate as a contact, 36... Lid, 37... Exhaust hole,
38...Abutting rib, 62...Charging circuit.

Claims (1)

[Claims] 1. A DC electric blower, a secondary battery for driving the DC electric blower, and a charging circuit for charging the secondary battery are built in, and a handle is provided above the secondary battery. A vacuum cleaner body is provided with an exhaust hole on the outer surface communicating with the DC electric blower, and the DC electric blower, the secondary battery, and the exhaust hole are arranged in this order in a line in the vacuum cleaner body, and the A partition wall is formed surrounding the secondary battery and the contacts connected to the electrodes of the secondary battery, a space is provided below the partition, and this space is connected to the exhaust side of the DC electric blower and the exhaust hole. An opening for inserting and removing a secondary battery is formed at the rear of the vacuum cleaner body, and the exhaust hole is provided in a lid that opens and closes this opening, and the inner surface of the lid A contact rib is provided on the side that surrounds the exhaust hole except for the lower part and comes into contact with the secondary battery when the lid body is attached to isolate the exhaust air passage and the exhaust hole from other spaces within the vacuum cleaner body. A vacuum cleaner characterized by: