JPS645728B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plug-in unit provided with a switch with a slide rod, one end of which moves in and out of the switch body in conjunction with a switch lever that opens and closes contacts.

Conventionally, in electronic equipment for communications and information, each circuit is often made into a unit and has a plug-in type rack structure. Such units are equipped with an inrush current prevention circuit to prevent switch contacts from welding due to overcurrent when the power is turned on, and malfunctions that may occur in other parallel-connected units due to a temporary voltage drop when the power is turned on. is provided.
As shown in Figure 1, this inrush current prevention circuit includes a capacitor 1, a relay 2, etc., and constitutes a delay circuit, but since these components are power components, they are large and have a large number of components, so the mounting area is limited. big.
On the other hand, recent units are moving toward higher density mounting of components, which requires a reduction in the mounting area of the inrush current prevention circuit. The present invention was devised based on this request.

For this reason, the present invention has a contact that opens and closes according to the operation of the switch lever, and a slide rod that interlocks with the switch lever, and the end of the rod protrudes from the switch body or moves to the retracted position as the switch lever opens and closes. A switch with a slide rod is provided on the side of the unit so that the slide rod can protrude, and when the unit is inserted into or removed from the unit accommodating part, the unit can be passed through with the slide rod retracted to pass through a part of the unit accommodating part. and make it stick out.
This feature is characterized in that the slide rod is engaged with the unit accommodating portion to prevent the unit from being pulled out.

Further, the slide rod is characterized in that a portion of the slide rod that protrudes from the switch body when the switch lever is operated is chamfered on the side opposite to the switch lever, or chamfered on the switch lever side and the opposite side thereof, Furthermore, the slide rod is characterized in that one end thereof is biased by a spring in a direction protruding from the switch body.

Embodiments of the present invention will be described in detail below based on the accompanying drawings.

FIG. 2 shows a first embodiment of a switch with a slide rod according to the present invention. This is switch body 3
terminals 4, 5, and 6, a distribution plate 7 that is swingably supported with the center terminal 5 as a fulcrum, and this distribution plate 7.
A slide rod 9, which is the key point of the present invention, is added to a normal toggle switch equipped with a switch lever 8 for moving the toggle switch. This slide rod 9
has two collars 10 and 10', and the switch body 3
The two flanges 10, 10' are inserted into guide holes 11, 11' provided in the switch lever 8.
A pendulum 12 attached to the pendulum is loosely sandwiched between the pendulums 12 and 12, and is driven up and down by a switch lever 8. The switch lever 8 is rotatably attached to the switch body 3 by a pin 13, and has a flexible shaft 14 attached to its tip.

In the switch configured in this manner, terminals 5 and 6 are in the ON state as shown in FIG. . Next, if the switch lever 8 is rotated in the direction of arrow P, the state as shown in Figure b will be obtained. That is, the distribution plate 7 rotates to turn off the terminals 5 and 6. At the same time, the slide rod 9 is pushed upward by the pendulum 12 and its tip 9a is pulled into the switch body 3.

Next, a plug-in unit according to a first embodiment of the present invention will be explained. FIG. 3a shows the plug-in unit 15 being inserted into the frame 16. The switch 17 of this embodiment is attached to the plug-in unit 15, and the switch 17 is inserted as shown in the figure. When the slide rod 9 is in the ON state, the slide rod 9 protrudes and hits the frame 16, making it impossible to completely insert the unit 15. Next, as shown in Figure b, when the switch lever 8 is pushed down and the switch 17 is turned OFF, the lower end of the slide rod 9 is drawn into the switch body, so the unit 15 can be completely inserted into the frame 16, and at the same time Connectors 18, 18' are connected. Figure c shows the switch lever 8 turned ON with the unit completely inserted into the frame. The slide rod 9 protrudes from the switch body and enters the hole 19 provided in the frame 16, and the switch 17 is turned ON. Become. If a resistor 20 is connected in parallel to this switch 17 as shown in Figure 4, the switch must be turned on when inserting the unit into the frame.
Since the connector is inserted in the OFF state, the connector is completely connected and the switch 17 is turned on after charging the capacitor 21 through the resistor 20, thereby preventing inrush current. The inrush current prevention circuit shown in FIG. 4 is much simpler than the conventional circuit shown in FIG. 1, and requires less mounting area.

According to the first embodiment, the unit cannot be inserted into or pulled out of the frame unless the slide rod is pulled into the switch body, or in other words, pulled in from the side of the unit, which prevents careless operation. Insertion and removal operations can be prevented.

Next, a switch with a slide rod according to a second embodiment is shown in FIG. The switch used in this embodiment differs from the switch used in the first embodiment in that the tip of the slide rod 9 is chamfered in the direction opposite to the switch lever 8 to form a slope 22, as shown in the figure.

When the switch according to this embodiment is used in the plug-in unit according to the second embodiment, as shown in FIG. 6a, when the switch 17 is in the ON state, the slide rod 9
unit 15 even if it protrudes from the switch body.
When the slide rod 9 is pressed in the direction of the arrow Q, the slope 22 of the slide rod 9 is pressed by the frame 16, so that b
It is pushed into the switch body as shown in the figure. The pushed slide rod 9 rotates the switch lever 8 to turn the switch OFF. Thereafter, the connectors 18, 18' are connected. If the unit 15 is further pressed in this state, the frame 1 will be completely removed as shown in figure c.
6 can be inserted. After this, when the switch lever 8 is turned on, the slide rod 9 enters the hole 19 provided in the frame 16, and the switch 17 is turned on.
is turned on. When using the switch of the first embodiment, it is necessary to manually turn the switch OFF when inserting the unit into the frame, but when using the switch of this embodiment, it is automatically turned OFF.
It is in the OFF state, and the inrush current prevention effect is performed in the same way as in the previous embodiment.

According to the second embodiment, the unit cannot be pulled out from the frame unless the slide rod is pulled into the switch body (beyond the side of the unit), thereby preventing inadvertent pulling out.

Next, a switch with a slide rod according to a third embodiment is shown in FIG. The switch used in this embodiment is different from the switch used in the first embodiment in that the tip of the slide rod 9 is chamfered both in the direction of the switch lever and in the opposite direction as shown in the figure to form slopes 23 and 23'. However, a spring 24 is provided to bias the slopes 23, 23' so that they always protrude from the switch body 3. When the switch according to this embodiment is used in the plug-in unit according to the third embodiment, the slide rod 9 always protrudes from the switch body when the unit 15 is inserted into or removed from the frame 16 as shown in FIGS. 8a to 8c. The switch 17 is automatically turned on and off because it is biased by a spring and its tip is chamfered, so that manual operation of the switch lever 8 is not required. Note that the rush current prevention effect is performed in the same manner as in the first and second embodiments.

According to the third embodiment, since the chamfer on the pulling side of the unit is steep, it cannot be pulled out easily unless a considerable pulling force is applied.

As explained above, the plug-in unit of the present invention simplifies the inrush current prevention circuit of the plug-in unit by providing the unit with a switch with a slide rod that interlocks with the switch lever.
This makes it possible to improve component mounting density and reliability. The slide rod also serves to prevent the unit from falling off the frame.

Although each of the above embodiments has been described using a toggle switch, it goes without saying that the switch according to the present invention can also be applied to a slide switch.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of a conventional inrush current prevention circuit, Fig. 2 is a sectional view of a switch with a slide rod according to a first embodiment of the present invention, and Fig. 3 is an operation of the plug-in unit of the first embodiment. 4 is a circuit diagram of an inrush current prevention circuit using a switch according to the present invention, FIG. 5 is a sectional view of a switch with a slide rod according to a second embodiment of the present invention, and FIG. FIG. 7 is a sectional view of a switch with a slide rod according to the third embodiment of the present invention, and FIG. 8 is an explanatory diagram of the operation of the plug-in unit of the third embodiment. It is. 3... Switch body, 4, 5, 6... Terminal, 7
...Distribution plate, 8...Switch lever, 9...Slide rod, 10,10'...Tsuba, 11,11'...
...Guide hole, 12...Pendulum, 13...Pin, 14
...Flexible shaft, 15...Unit,
16... Frame, 17... Switch, 18, 18'
... Connector, 19 ... Hole, 22, 23, 23'
...Slope, 24...Spring.

Claims (1)

[Scope of Claims] 1. It has a contact that opens and closes according to the operation of the switch lever, and a slide rod that interlocks with the switch lever, and the end of the rod protrudes from the switch body or moves to a retracted position as the switch lever opens and closes. A switch with a slide rod is provided on the side of the unit so that the slide rod can protrude, and when the unit is inserted into or removed from the unit accommodating part, the unit can be passed through with the slide rod retracted to pass through a part of the unit accommodating part. A plug-in unit characterized in that a slide rod is engaged with a unit accommodating portion in a protruding state, thereby making it impossible to extract the unit. 2. The plug-in unit according to claim 1, wherein the slide rod is chamfered on the side opposite to the switch lever at a portion that protrudes from the switch body when the switch lever is operated. 3. The plug-in unit according to claim 1, wherein the slide rod is chamfered on the switch lever side and on the opposite side of the portion that protrudes from the switch body when the switch lever is operated. 4. The plug-in unit according to claim 1, wherein the slide rod is biased by a spring in a direction in which one end protrudes from the switch body.