JPH0335238Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a small and lightweight rechargeable vacuum cleaner that uses a rechargeable battery as a power source.

(b) Prior Art For example, Japanese Utility Model Publication No. 38-19224 discloses a vacuum cleaner in which the suction force can be changed by switching the resistance value of a resistor using a switching tab. However, in this conventional example, the resistor wastes power, and the resistor itself generates heat, so a heat dissipation means is required, and especially in rechargeable vacuum cleaners, the power consumption per charge is low. The drawbacks are that the usage time is reduced and the vacuum cleaner itself becomes heavy, making it impossible to reduce its weight.

(c) Problems to be solved by the invention This invention is a rechargeable vacuum cleaner that uses a rechargeable battery as a power source, which can switch between strong and weak suction power without wasting power consumption, reduces the weight of the vacuum cleaner itself, and further This ensures that each battery is fully charged.

(d) Means for Solving Problems The rechargeable vacuum cleaner of the present invention includes a first battery group and a second battery group having the same charging capacity, a fan motor driven by the first and second battery groups, and a fan motor driven by the first and second battery groups. a main body part incorporating a changeover switch for switching and controlling the first and second battery groups to be connected in parallel or in series;
and a charging base that supplies charging current to the battery groups, the charging base having a holding means for holding the changeover switch in a position where both the battery groups are connected in series.

(e) Operation By switching the switch, the first and second battery groups are connected in series or in parallel, and the suction force of the fan motor is switched between strong and weak, and the charging base is switched between the switch and the switch. Since the battery group is provided with a holding means for holding the battery group in a position where the battery group is connected in series, charging of the battery group is always performed in a serially connected state, and each battery can be reliably fully charged.

(F) Embodiment 1 is a main body of a rechargeable vacuum cleaner, in which an intake port 3 is bored in the front wall 2 and a handle 4 is formed at the rear, and a rechargeable battery 5 is installed below the handle 4. A fan motor 6 is housed behind the front wall 2 with a fan 6a disposed so as to face the intake port 3. Reference numeral 7 denotes a push button type power switch built into the main body 1, which is opened and closed by a push button 7a placed near the handle 4. Reference numeral 8 denotes a charging terminal receptacle recessed in the bottom of the main body 1, and is provided with a pair of power receiving terminals 9a and 9b. Further, reference numeral 10 denotes a speed changeover switch built in at a position adjacent to the charging terminal receptacle 8 at the bottom of the main body 1, consisting of a two-circuit, two-contact switching type seesaw switch, the operation part 11 of which is exposed at the bottom. .

Reference numeral 12 denotes a dust collection case connected to the main body 1 so as to cover the front wall 2 of the main body 1, and has a suction port 13 at the front end and houses a paper filter 14 and a filter support 15.

Reference numeral 16 denotes a charging base that holds the main body 1 connected to the dust collection case 12 and supplies charging current to the rechargeable battery 5 in the main body 1, and a power supply plug 17 that is inserted into the charging terminal socket 8. and a pressing rod 18 that comes into contact with and presses the first operating surface 11a of the operating section 11 of the speed changeover switch 10 when the main body 1 is placed and held; The plug 17 has the charging terminal socket 8
A pair of power supply terminals 19a and 19b are provided which are connected to the pair of power reception terminals 9a and 9b when inserted into the power supply terminal.

Next, Figure 3 is an electrical circuit diagram, in which 2
0 is a charging transformer housed in the charging base 16, and its secondary winding is connected to the power supply terminals 19a and 19b via a rectifying diode 21.
Further, reference numerals 22 and 23 denote a first battery group and a second battery group having the same charging capacity and forming the rechargeable battery 5, each of which is made up of two nickel cadmium batteries of 1.25 V and 1200 mAH connected in series. 2 more
Reference numerals 4 and 25 denote first and second switches constituting the speed changeover switch 10, and these switches 24 and 2
The switching contacts 24a and 25a of 5 are the respective first contacts 2
4b, 25b and second contacts 24c, 25c, and when the first operating surface 11a of the operating section 11 is pressed, the switching contacts 24a, 25a move to the first contacts 24b, 25b side. When the switch is turned on and the second operation surface 11b is pressed, the switching contact pieces 24a, 25a switch to the second contacts 24c, 2.
It is designed to be thrown into the 5c side. The power receiving terminal 9a on the positive side is connected to the positive electrode of the first battery group 22, the switching contact piece 24a of the first switch 24, and the power switch 7 through the reverse current prevention diode 26, and the power receiving terminal 9b on the negative side is connected to the 2 switch 25
The second contact point 25c of the second battery group 23, the negative electrode of the second battery group 23, and one end of the fan motor 6 are connected to each other. Further, the switching contact piece 25a of the second switch 25 is connected to the first battery group 2.
The first contact 25b of the second switch 25 is connected to the negative electrode of the second switch 25.
are connected to the second contact 24c of the first switch 24 and the positive electrode of the second battery group 23, respectively, and the power switch 7 is connected to the other end of the fan motor 6.

Therefore, the first operating surface 11 of the speed changeover switch 10
When a is pressed, the first battery group 22 and the second battery group 23 are connected in series, and when the power switch 7 is turned on, the fan motor 6 can rotate at high speed and obtain a strong suction force. 10
If you press the second operation surface 11b of
When the fan motor 6 is turned on, the fan motor 6 can rotate at a low speed to obtain a weak suction force, and when the main body 1 is placed and held on the charging base 16, a pressing force that constitutes a holding means that holds the changeover switch 10 in a predetermined position is generated. Rod 1
8 is the first operation surface 11 of the speed changeover switch 10
a to connect the first and second battery groups 22 and 23 in series, and to apply charging current to the first and second battery groups 22 and 23.
By uniformly flowing the battery to the second battery groups 22 and 23, these battery groups 22 and 23 are reliably charged in the same state until they are fully charged.

(g) Effects of the invention In this invention, the strength of the attraction force is switched by switching between the series connection and the parallel connection of the first and second battery groups, so there is no unnecessary power consumption as in the conventional example, which is done by switching the resistors. It can be used for a long time on a single charge, and it can be lightweight because there is no need for heat dissipation means. Furthermore, during charging, the changeover switch built into the main body is held in the position where the first and second battery groups are connected in series by the holding means provided on the charging base, ensuring that each battery group is fully charged. ,
The full capacity of each battery group can be utilized.

[Brief explanation of the drawing]

The drawings all relate to embodiments of the rechargeable vacuum cleaner of the present invention, and Fig. 1 is a cross-sectional view of the state in which it is placed and held on the charging base, Fig. 2 is a cross-sectional view of the state in which it is not placed and held on the charging base, and Fig. Figure 3 is an electrical circuit diagram. 6... Fan motor, 10... Speed selector switch, 18... Pressing rod, 22... First battery group, 23
...Second battery group.

Claims (1)

[Claims for Utility Model Registration] A first battery group and a second battery group having the same charging capacity, a fan motor driven by the first and second battery groups, and the first and second battery groups connected in parallel or in series. a main body part incorporating a changeover switch for switching and controlling the connection;
a charging base that supplies charging current to the battery groups, the charging base having a holding means for holding the changeover switch in a position where both the battery groups are connected in series. Vacuum cleaner.