JPS60127627A - Switch mechanism utilizing keey solenoid - 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 (Technical Field) The present invention relates to a switch mechanism that performs manual setting and automatic reset.

(Prior art) For example, when a machine detects that a paper jam has occurred during paper transport in a copying machine, etc., it mechanically opens the circuit, and then keeps it open until the circuit is manually signaled by Minoru Sakaki that the paper has been recovered. A mechanism (jam keep switch) is required.

The above-mentioned switch mechanism is used in such a case, and a conventional switch mechanism of this type will be explained based on FIGS. 2 and 3.

In both Figures 2 and 3, (a) is a plan view, (b) is a side view, (
c) is an engagement diagram of the push button, FIG. 2 shows a reset state, that is, a state in which the circuit is opened due to a jam detection signal in the copying machine, and FIG. 3 shows a set state, that is, a jam processing This shows the state in which the circuit is closed again.

Apply current. The DC solenoid 1 pulls the link 2 and the link 2 removes the protrusion 4 of the limit switch 3. Also, the claw 5 provided on the link 2 is removed from the groove in the shaft 7 of the push button 6. The shaft 7 is then pushed out by the spring 8.

In this state, even if the current application to the DC solenoid is cut off, the claw 5 of the link 2 is removed from the groove of the shaft 7, so the switch remains open.

Next, when the push button 6 is pressed manually, when the groove of the shaft 7 matches the pawl 5 of the link 2, the link 2 is pulled by the link spring 9, and the pawl 5 of the link 2 enters the groove of the shaft 7 and engages. It is locked. At the same time, the link 2 pushes the protrusion 4 of the limit switch (Fig. 3).

As described above, the conventional mechanism was complicated, the bracket was not designed in a mental manner, the cost was high, and the reliability was poor.

(Objective) The present invention was made in view of the drawbacks of the conventional example, and it is an object of the present invention to provide a switch mechanism that performs manual setting and automatic reset using a simple mechanism.

(composition) The configuration of the present invention will be explained below based on the illustrated embodiments.

FIGS. 1(a) and 1(b) are longitudinal cross-sectional views showing the switch mechanism according to the present invention, with (a) showing the set state and (b) the beam set state.

The present invention utilizes a keep solenoid that incorporates a permanent magnet in the magnetic circuit of a DC solenoid.

To explain the operation of the keep solenoid 10, the (
In the state shown in a), the plunger 11 is attracted to the stator 14 which is configured as a magnetic circuit by the magnetism generated by the permanent magnet 12 and the frame 13.

At this time, if the DC solenoid tendon 5 is magnetized in the opposite way to the above case, the attraction force between the plunger 11 and the stator 14 will be weakened, and the coil spring 16 will cause the plunger 11 to stick to the stator 1.
It is tightened from 4. At this time, even if the current application to the DCC solenoid 15 is stopped, a space is created between the plunger 11 and the stator 15 [the state shown in FIG. This does not occur, and the state shown in FIG. 1(b) is maintained.

In the state shown in FIG. 1(b), the push button 17 is pushed against the coil spring 16, and the plunger 11
When the permanent magnet 12 is brought close to the magnetic circuit, the attraction force by the magnetic circuit of the permanent magnet 12 increases, and eventually the state returns to the state shown in FIG.

Also, if the DC solenoid 15 is energized in the opposite direction to that described above (flow in the same direction as the magnetic circuit by the permanent magnets), the plunger 11 will be attracted to the stator 14, and even after this, even if the energization is turned off, the plunger 11 will be attracted by the magnetic circuit by the permanent magnets 12. Figure 1 (
Maintain the state of a).

Further, in the state shown in FIG. 1(a), if you hold the push button 17 with your hand and pull the plunger 11 away from the stator 14 against the attraction force of the permanent magnet 12, the attraction force will be weakened, as shown in FIG. 1(b). The state will be maintained.

The pusher 11 is also provided with an actuator 18 at its tip, and further faces the actuator 18,
Moreover, an electrical contact 19 is arranged within its working area.

To explain the switch mechanism shown in FIG. 1 again, the first
In figure (a), a sensor that detects machine trouble.
20 detects an abnormality, and the control circuit 21 automatically inputs the motor.
At the same time, a current is applied to the keep solenoid 10. Then, the above-mentioned through ginger 11 changes from the state shown in Fig. 1 (a) to the state shown in Fig.
The switch 19 is opened.

Electrical contact 1 remains open when pushbutton 17 is pressed manually, informing control '11 circuit 22 that it has not yet been set. Note that these functions always require human intervention and are provided for the purpose of preventing the machine from automatically returning to its original state when the power is turned off or for other reasons.

(Effects) The present invention is as described above, and according to the present invention, compared to the conventional keep switch assembled by multiple mechanisms (keep relay, push button switch, and limit switch mooring mechanism) The mechanism can be simplified, reducing assembly man-hours and parts costs.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing a switch mechanism according to an embodiment of the present invention, in which (a) shows a set state, and (b)
2 is a diagram showing a reset state, FIGS. 2 and 3 are diagrams showing a conventional switch mechanism, and FIGS. 2(a) and 3(a) are plan views thereof, and FIG. ), FIG. 3(b) is a side view thereof, and FIG. 2(C) and FIG. 3(c) are views showing the engagement state of the push button and the claw. 10...Keep solenoid, 11...
Plunger, 12...Permanent magnet, 15...
... DC solenoid, 16 ... Return spring, 17 ... Push button, 18 ... Actuator, 19 ... Electric contact.

Claims (1)

[Claims] A permanent magnet is also used in the magnetic circuit of the DC solenoid, and a push button is provided at one end of the plunger of the keep solenoid, which performs suction, adsorption, and recovery operations by applying instantaneous current, with a return spring interposed. A switch mechanism using a keep solenoid, characterized in that a contact actuator is provided at the other end, and an electric contact is arranged within the operating range of the contact actuator.