JPH055277Y2 - - 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 Figs. 5 to 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 integrally formed with a metallic (brass, for example) brush holder 7, 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. The cord reel 12 has a cord 13 and a plug 14, and the cord reel has two lead wires 15,
16 is a lead wire 17 from the terminal 10 of the commutator electric blower 11, a lead wire 18 is from the terminal 8, and lead wires 20, 21, from the power control circuit 19,
22 comes out and each is connected. Further, lead wires 23 and 24 for a 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, the entire vacuum cleaner is assembled with each part (commutator electric blower 11, cord reel 12, control circuit 1).
9) into the vacuum cleaner body, connect the lead wires 15, 1.
6, 17, 18, 20, 21, and 22 were connected.

Problems that the invention aims to solve Vacuum cleaners that use a commutator motor 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 was 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 consists of a stator, a rotor with a fan fixed to one end, a contact spring, and a resin-made member that holds the rotor on the side opposite to the fan. It is composed of a bracket and an air guide that is located below the fan and holds a fan-side bearing of the rotor, and a circuit equipment section that removably holds a printed circuit board is provided on the side of the bracket, and The end of the coil is connected to a terminal, and a part of the contact spring is brought into contact with the terminal, and one end of the contact spring is brought into contact with the printed circuit board, thereby electrically connecting the end of the coil and 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 conventional method of connecting the electric blower and the control circuit can now be automatically connected between the stator terminal and the control circuit board using a contact spring.
In addition, since the contact spring passes through the bracket at the holding part of the bracket and is exposed to the outside of the bracket, aging and electrical inspections of the motor can be automatically performed using the exposed part of the contact spring outside the bracket. This means that manual work only needs to be done between the cord reel and the control circuit, which can greatly reduce the amount of manpower required. Automation of vacuum cleaner assembly becomes easier, which has a significant effect 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 comber 32.
A resin winding work 33 is attached to the coils 34, 3.
5 is wound, one ends 34a, 35a are connected to terminals 36a, 36b attached to the winding work 33, and the other ends 34b, 35b are connected to terminals 36c, 36d.

As shown in FIGS. 2 and 3, this stator 31 is housed in a resin bracket 37 and connected to terminals 36.
A and 36b are in contact with contact springs (not shown) that are integrally formed with brush holders 38 and 39 made of metal (for example, brass). Control circuit installation part 37a provided on the side of the bracket 37
A printed circuit board 40 for controlling the power of the motor is housed inside. Printed circuit board 4
0 has electronic parts for power control as well as lead wires 41 and 4 for remote control.
2, and terminals 43 and 44 for power supply are attached. Contact springs 45 and 46 come into contact with the conductive portions of the printed circuit board 40, so that current flows. A cooling fin 47 is provided on the inside of the motor of the printed circuit board 40, and projects into the inside of the motor through the hole 37b of the bracket 37. A current control element 48 for controlling the motor is attached to the cooling fin 47. ing.

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 portion of the printed circuit board 40 through the communication hole 37c of the bracket 37. Contact spring 4
6 and 45 pass through the holding part of the bracket 37,
The tips 46a, 45a are exposed to the rear outside of the bracket 37. Further, the holding portion of the bracket 37 of the contact spring 46 is prevented from coming off by cut and raised portions 46b and 45b. A rib 37d is formed at the rear of the bracket 37, and its height is set higher than the protrusion of the tip 46a so that the tip 46a of the contact spring 46 is not deformed during normal handling.

The bracket 37 is provided with an exhaust port 37e,
Together with the air guide 49, it forms an electric blower. Inside thereof, a rotor 50 and a shaft 50a of the rotor 50 are disposed together with the stator 31.
passes through the air guide 49, and the fan 51
is stopped, and a casing 52 covers the top thereof. An intake port 52a is provided in the center of the casing 52.
is open.

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, air is sucked into the fan 51 from the intake port 52a of the casing 52 due to the rotation of the fan 51, and is discharged to the outer periphery of the fan 51. This air is guided to the air guide 49 and enters the inside of the motor. After cooling the cooling fins 47 and also cooling the stator 31 and rotor 50, the air exits the motor from the exhaust port 37e. A portion of the air enters the control circuit installation portion 37a through the communication hole 37c and hole 37b of the bracket 37, cools the printed circuit board 40, and is discharged to the outside.

The circuit block diagram of a vacuum cleaner using this commutator electric blower is as shown in FIG. 45, lead wires 55 and 56 from the cord reel 54 are connected. A cord 58 with a plug 57 attached to the end thereof is wound around the cord reel 54.

The assembly of the commutator electric blower is carried out by attaching the tips 45a, 46a of the contact springs 45, 46 to the holding portion of the bracket 37.
When the bracket 37 is pushed in, the tips 45a and 46a protrude rearward from the bracket 37, and the cut-outs 45b and 46b
Then, the stator 31, the rotor 50, the brush holder 38,
39, and the printed circuit board 40 is attached to the installation portion 37a.
Simply inserting the motor into the bracket 37 completes all connections between the stator 31, printed circuit board 40, and rotor 50 through the contact spring (not shown) provided on the brush holder and the contact springs 45, 46. Furthermore, since the tips 45a, 46a of the contact springs 45, 46 protrude from the rear of the bracket 37, when the assembly of the electric motor section or the assembly of the completed electric blower is completed, internal continuity inspection and aging can be performed by simply pressing the inspection and merging electrodes from below to above the motor while it is still on the automatic assembly pallet, making automatic assembly and automatic inspection extremely easy.
Even if the electric current from the pallet hits it somewhat strongly, the cut-and-raised portions 45b and 46b prevent the contact springs 45 and
The contact springs 45 and 46 do not come off the retaining portion of the bracket 37.
The rearward projection of the bracket 37 at 46a is set lower than the rib 37d, so that it is unlikely to be deformed by hitting something during normal handling, and is therefore highly reliable.

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 40
is also cooled at the same time, improving the reliability of the control circuit.

Effects of the invention In this invention, the stator coil winding and the motor bracket are made of resin, the stator has terminals, the motor bracket has a printed circuit board, and the contact spring is held at the rear of the bracket. By penetrating the bracket until the end of the bracket and protruding its tip to the rear of the bracket, and bringing it into contact with the terminals of the stator and the live parts of the printed circuit board, the assembly and wiring can be streamlined.
It also facilitates the automation of assembly, inspection, and aging.
This makes it possible to improve productivity and reduce costs.

[Brief explanation of drawings]

Fig. 1 is a top view of the stator of one embodiment of the present invention, Fig. 2 is a rear view of the electric blower, Fig. 3 is a sectional view for explaining the operation, and Fig. 4 is an electric blower using the electric blower of the present invention. A circuit block diagram of a vacuum cleaner. Fig. 5 is a top view of a conventional stator, Fig. 6 is a back view of a conventional electric blower, and Fig. 7 is a circuit block diagram of a vacuum cleaner using a conventional electric blower. . 31...Stator, 36c, 36d...Terminal, 37...Bracket, 37a...Circuit installation part, 37c...Communication hole, 40...Printed circuit board,
45, 46...Contact spring, 45a, 46a...Tip, 45b, 46b...Cut and raise.

Claims (1)

[Scope of utility model registration request] a stator, a rotor with a fan fixed to one end, a contact spring and a resin bracket that holds the opposite side of the rotor, and an air guide that is located below the fan and holds a bearing on the fan side of the rotor. A circuit equipment section for removably holding a printed circuit board is provided on the side of the bracket, an end of the coil of the stator is connected to a terminal, a part of the contact spring is connected to the terminal, and one end is connected to the printed circuit board. 1. A commutator electric blower, characterized in that the coil terminations and the printed circuit board are electrically connected to each other by contacting each other with a circuit board.