JPS5838416A - Switching unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] This invention relates to a switching device.

Vacuum cleaners have a built-in electric blower, but in order to control the air volume from this electric blower, the DC motor, which is normally stopped, is rotated in the forward direction by one-way operation of the polarity switching device, and the polarity switching device is turned on. Operation in the other direction causes the motor to rotate in the opposite direction, and the rotation of the DC motor rotates the input control circuit of the electric blower, such as a volume control circuit, thereby controlling the wind.

The above polarity switching device, specifically, consists of an on-off-on type changeover switch and two diodes F, and can be inserted between an AC power source and a DC motor to The DC motor is rotated in the positive or reverse direction by selectively supplying the positive half-wave and negative half-wave of AC power, and the changeover switch has a fixed contact and a movable contact. Switching was performed by contact between the two.

However, in a polarity switching device with such a configuration, the structure of the changeover switch is complicated, and the connection between the contact and the diode must be made by connecting with a lead wire or by soldering to the board, which causes problems at the connection part. There are many factors that lead to defects such as poor contact, and it has drawbacks in terms of quality and price.

Therefore, an object of the present invention is to provide a switching device that has a simple configuration and can reduce electrical failures.

A vacuum cleaner to which an embodiment of the present invention is applied is shown in FIGS. 1 to 3. In FIG. 1, 1 is a vacuum cleaner main body, 2 is a hose containing a conducting wire, and 3 is an attachment such as a polarity switching device, a 4-wire extension pipe, and a floor suction port. The three polarity switching devices are further constructed as follows. Second
In the figure and FIG. 3, 5A and 5B are each 9
J Kaekawa's diode has a spherical Ii'il constant contact 5C at the tip of the anode side lead wire of the diode 5A and the tip of the cathode side lead wire of the diode 5B.

5D is integrally formed, and the cathode side lead wire of the diode 5A and the anode side lead wire of the diode 5B are electrically connected to the connecting lead wire 7 by a crimp terminal 6. , 5B are groove portions 8A, 8B, 9A, 9B of the support base 8.9 having electrical insulation properties.
It is press-fitted and fixed. Reference numeral 10 denotes a movable contact, which is fixed to both sides of the tip of a metal contact support spring piece 11 in the form of hemispherical protrusions, and is disposed between fixed contacts 5C and 5B. A connection lead wire 12 is electrically connected to the contact support H'' spring piece 11 by half lI attachment or spot welding, and is fixed by an electrically insulating support base 13.The movable piece 14 is It is fixed to the contact support spring piece 11, and by moving the movable piece 14 in the direction of arrow A and B, the spring piece 1 is fixed to the contact support spring piece 11, which is normally in the neutral position.
1 by bending the movable contact IO to the fixed contact 5C or 5.
The movable piece 14 is made to protrude from the outside of the operable case 15.

Regarding the operation Fu1, the movable piece 14 is now opened from the outside.
When is operated in the direction of arrow A, the movable contact 10 and the fixed contact 5C are electrically connected, and the diode 5A is inserted into the circuit only during the contact period.

Conversely, if you operate in the direction of arrow B, you can do it! 13 contact 10 and fixed contact 5D are electrically connected, and the diode 5B of the reverse polarity is inserted into the circuit only during the contact period. The direct current motor is rotated in forward and reverse directions according to these circuit changes, and the input control element such as a volume control element is moved by the rotation of the motor to control people and vehicles.

In this way, the diodes 5A, 5B and the fixed contacts 5C, 5
Since D and D are integrated, no electrical failure occurs between them, and the contact structure is also simple, reducing troubles caused by defects in component parts.

Note that instead of the dies A and 5A and 5B, a first resistor with a high resistance value and a second resistor with a low resistance value are used, and the current is increased by switching the first and second resistors. You can also change the wind value of a vacuum cleaner, etc. However, in this case,
A locking mechanism is required for the cable 11 and the piece 14.

As described above, the switching device j1 of the present invention includes first and second electronic components, a pair of fixed contacts integrally formed at the ends of the lead wires of the first and second electronic components, and The first fixed contacts are placed close to each other.
and a first insulating support base that supports the lead wires of the second electronic component, respectively, and a movable contact that is arranged between the pair of fixed contacts and constitutes a changeover switch with the pair of fixed contacts (5). , a contact support spring piece to which the movable contact is fixed at the tip, and a second insulating support base that supports the base end of this contact support spring piece, so the structure is simple and electrical failure is prevented. It has the effect of being able to do less.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a vacuum cleaner to which this invention is applied, and FIGS. 2 and 3 are perspective views of a polarity switching device according to an embodiment of this invention. 3...Polarity switching device, 5A, 5B...Diode,
5C, 5D... Fixed contact, 8.9... Support stand, 8A
. 8B, 9A, 9B...Groove, 10...Movable contact, 11
...Contact support spring piece, 13...Support stand, 14...
Movable piece (6)

Claims (1)

[Claims] first and second electronic components, a pair of fixed contacts integrally formed at the tips of the lead wires of the first and second electronic components, and a pair of fixed contacts disposed in close proximity to each other. and a first insulating support base that supports the IJ-F wires of the electronic component and the second electronic component, and a movable contact that is disposed between the pair of fixed contacts and constitutes a changeover switch with the pair of fixed contacts; A switching device comprising: a contact support spring piece having the movable contact fixed to its tip; and a second insulating support base supporting a base end of the contact support spring piece.