JPH0517438Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a commutator electric blower used in vacuum cleaners and the like.

Conventional technology Conventionally, this type of commutator electric blower is shown in Figures 5 and 6.
The structure was as shown in the figure.

That is, in the stator 1, a winding 3 is wound around a core 2 to form a coil 4 and a coil 5.
b had been pulled out. As shown in FIG. 6, the coil 4 is housed in an iron bracket 6, and one end 4a of the coil 4 is connected to a terminal 7a formed integrally with a brush holder 7 made of metal (for example, brass), and the other end 4b is connected to terminal 8. One end 5a of the coil 5 is connected to a terminal 9a which is similarly formed integrally with the brush holder 9, and the other end 5b is connected to a terminal 10. Brush holder 7, 9
Each has a built-in brush (not shown) and is in contact with the rotor's commutator. Power is supplied from the outside to this commutator electric blower 11 through terminals 8 and 10.
It is carried out from

When attempting to control the power of the motor using such a commutator electric blower, the circuit block diagram of the entire vacuum cleaner becomes as shown in FIG. A cord 13 and a plug 14 are attached to the cord reel 12, and two lead wires 1 are attached to the cord reel 12.
5 and 16 are a lead wire 17 from the terminal 10 of the commutator electric blower 11, a lead wire 18 from the terminal 8, and a lead wire 2 from the power control circuit 19.
0, 21, and 22 are output and each is connected. Further, lead wires 23 and 24 for remote control come out from the power control circuit 19.

To assemble such a commutator electric blower 11, after press-fitting the stator 1 into the bracket 6, both ends 4a, 4b, 5a, 5b of the coils 4, 5 are connected to the respective terminals 7a, 8, 9a, 10. , workers were processing the leads and making connections. In addition, to assemble the entire vacuum cleaner, after setting each part, commutator electric blower 11, cord reel 12, and power control circuit 19 into the vacuum cleaner body, connect the lead wires 15, 16, 17, 18, 20, 21, and 22. I was doing it.

Problems that the invention aims to solve Vacuum cleaners that use a commutator electric blower with this structure have many lead wires, and the connection of the lead wires is difficult to mechanize, so much of the work must be done manually. This has become a major impediment to unmanned factories and automation.

Therefore, the present invention reduces the number of lead wires,
The aim is to reduce the reliance on human labor and make it easier to automate and unmanned production.

Means for Solving the Problems The technical means of the present invention for solving the above problems is to provide terminals for connecting the ends of the stator coils, and to construct the motor bracket from a synthetic resin molded product. A control circuit installation part is provided that can hold the printed circuit board with a bracket, and a contact spring held inside the bracket is brought into contact with the terminal and a conductive part of the printed circuit board. Further, at the entrance of the control circuit board installation section, a claw portion is formed that overlaps the printed circuit board from the opposite side where the contact spring contacts the printed circuit board.

Effect The effect of this technical means is as follows.

That is, since the coil ends of the stator can be wired to the terminals with the stator alone, if the stator coil winding machine automatically wires the wires, manual wire connection can be eliminated and automation can be achieved. Furthermore, the connection between the electric blower and the control circuit, which was conventionally required, can now be automatically connected to the stator terminals and the control circuit board using contact springs. Due to the contact pressure of the spring, it can fit under the claws that overlap the board and automatically prevent the board from coming off, so manual work can only be done between the cord reel and the control circuit. This makes it easier to assemble vacuum cleaners, greatly reduces manpower, makes it easier to automate the assembly of vacuum cleaners, etc., and has great effects on improving productivity and reducing costs.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings.

In FIG. 1, the stator 31 is connected to the core 32.
A synthetic resin winding frame 33 is attached to the coil frame 33, and coils 34, 35 are wound thereon, with one end 34a, 35
a is the terminal 36a, 3 attached to the winding frame 33;
6b, and the other ends 34b and 35b are terminals 36c and 36
It is connected to d.

As shown in FIGS. 2 and 3, this stator 31 is housed in a synthetic resin bracket 37,
Contact springs (not shown) integrally formed with brush holders 38 and 39 made of metal (for example, brass) are in contact with the terminals 36a and 36b. A printed circuit board 40 for controlling the power of the motor is housed in a control circuit installation section 37a provided on the side of the bracket 37. The printed circuit board 40 includes electronic components for power control as well as lead wires 4 for remote control.
1 and 42, and terminals 43 and 44 for power supply are provided. In the conductive part of this printed circuit board 40,
Contact springs 45 and 46 are in contact with each other, allowing current to flow. A cooling fan 47 is provided inside the motor of the printed circuit board 40, and the bracket 3
A current control element 48 for controlling the motor is attached to the cooling fan 47.

The contact springs 46 and 45 are held by the bracket 37 and come into contact with the terminals 36c and 36d, and also come into contact with the conductive part of the printed circuit board 40 through the communication hole 37c of the bracket 37, and move the printed circuit board 40 to the outside of the motor. I'm pushing. Printed circuit board 40
is an insertion opening of the circuit installation part 37a, and the claw 37d fits into the overlapping inner side.

The bracket 37 is provided with an exhaust port 37e,
Together with the air guide 49, it forms an electric blower. Inside the bracket 37, a rotor 50 is located together with the stator 31, and a shaft 50a of the rotor 50 passes through an air guide 49. A fan 51 is fixed at the tip thereof, and a casing 52 covers the top thereof. Casing 52
An air intake port 52a is opened at the center of the air intake port 52a.

With the above configuration, the terminal 4 of the printed circuit board 40
3 and 44, this current is controlled by the current control element 48 to the lead wire 4 for the remote control.
It is controlled based on signals from 1 and 42, and flows into the motor through contact springs 45 and 46, and then to the stator 31 and rotor 50. When the rotor 50 rotates, the fan 51
As the fan 51 rotates, air is sucked in from the intake port 52a of the casing 52 by the fan 51.
is discharged to the outer periphery of the This air is air guide 49
Guided by this, they go inside the motor. Then, the cooling fan 47 is cooled, and the stator 3
1. After the rotor 50 is cooled, it exits from the motor through the exhaust port 37e. A part of the air enters the control circuit installation part 37a through the communication hole 37c and hole 37b of the bracket 37, and enters the printed circuit board 40.
It is also cooled and discharged to the outside.

The circuit block diagram of a vacuum cleaner using this commutator electric blower is as shown in FIG. , 44, lead wires 55, 56 from the cord reel 54 are connected. A cord 58 with a plug 57 attached to the cord reel 54
is wrapped.

To assemble the commutator electric blower, after installing the contact springs 45 and 46 in the bracket 37, the stator 31, rotor 50, and brush holders 38 and 3 are assembled.
9 and the printed circuit board 40 into the installation part 37a, the contact springs (not shown) provided on the brush holder and the contact springs 45 and 46 can
Stator 31, rotor 50, printed circuit board 4
0 is completed, and contact spring 4 is
5 and 46, the printed circuit board 40 fits inside the claws 37d, so that the prevention of the printed circuit board 40 from coming off is completed.

Furthermore, when setting it to the vacuum cleaner body, only the lead wires 41 and 42 for remote control and the lead wires 55 and 56 from the cord reel 54 need to be processed, and both the electric blower assembly and the vacuum cleaner assembly are easy. Lead wire processing is greatly reduced, reducing the need for manual labor, making factories unmanned.
Automation can be greatly promoted.

Furthermore, since the cooling fins of the control circuit are cooled by room temperature air inside the motor before the motor is cooled, the cooling efficiency is good, and safety can be ensured because they are not exposed to the outside. Furthermore, the printed circuit board 4
1 is also cooled at the same time, improving the reliability of the control circuit.

Effects of the invention As described above, the present invention incorporates the stator and rotor of the motor in a synthetic resin bracket, and mounts a printed circuit board in the control circuit installation section provided on the side of this bracket, and connects the conductive section of this printed circuit board with the control circuit installation section. A contact spring that comes into contact with the terminal of the stator is provided on the bracket, and a claw part that overlaps the top of the printed circuit board is formed in the board insertion opening of the circuit installation part from the direction opposite to the contact spring. It is possible to improve productivity and reduce costs by streamlining wiring and wiring.

[Brief explanation of the drawing]

Fig. 1 is a top view of the stator of one embodiment of the commutator electric blower of the present invention, Fig. 2 is a rear view of the electric blower, Fig. 3 is a longitudinal sectional view of the same, and Fig. 4 is an electric blower using the electric blower. A circuit block diagram of a vacuum cleaner. Figure 5 is a top view of the stator of a conventional commutator electric blower.
FIG. 6 is a rear view of a conventional electric blower, and FIG. 7 is a circuit block diagram of a vacuum cleaner using the conventional electric blower. 31... Stator, 45, 46... Contact spring, 37... Bracket, 37c... Communication hole, 3
7a...Control circuit installation section, 38, 39...
...Brush holder, 36c, 36d...Terminal, 4
0... Printed circuit board, 43, 44... Terminal, 37
d...Claws.

Claims (1)

[Scope of utility model registration request] It consists of a stator, a rotor, a fan that rotates together with the rotor, a synthetic resin bracket that holds the anti-fan side of the rotor, an air guide that is located below the fan and holds the fan side bearing of the rotor, and the stator Connect the terminal end of the coil to the terminal, bring the contact spring held by the bracket into contact with the terminal, protrude toward the control circuit installation part provided on the side of the bracket, and connect the printed circuit board provided in the circuit installation part. The printed circuit board is placed near the entrance of the circuit installation section by the contact pressure, and the printed circuit board is fitted into the inside of the overlapping claw from the opposite side to the contact spring. Commutator electric blower.