JPH1010822A - Switch changeover device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely disconnect/connect a dual electric circuit by imparting sequence property to the disconnection/connection of the dual electric circuit, so as to adjust the intermittent timing of a switch. SOLUTION: A first switch 3 for connecting/disconnecting a system electric circuit and a second switch 4 for connecting/disconnecting an operation electric circuit are provided on first and second brackets 5 and 6 having the same turn center, respectively. An engaging part 14 for actuating the first switch 3 is provided in the second bracket 6. At this time, the first and second brackets 5 and 6 are pressed in directions where the electric circuits are connected by the first and second switches 3 and 4 respectively, by a side cover 1 and a main body upper cover 2, to obtain opposition to the pressing directions against both brackets 5 and 6 by using an energizing means 10 as energizing force larger than the circuit changeover force of the first switch 3 and both brackets 5-6 have the habit of turning in opposite directions. Then, a sliding mechanism 15 is provided between the main body upper cover 2 and the second bracket 6, to transmit the operation of the cover 2 to the second bracket 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch switching device used for an image forming apparatus or the like.

[0002]

2. Description of the Related Art In an image forming apparatus such as a copying machine or a facsimile, a user using the apparatus opens an upper cover or a side cover that covers the apparatus to replace a toner magazine or to remove a paper jam. May be. Such a device is provided with a switch switching device for turning off the switch and stopping the device when a cover to be covered by the device is opened for the safety of the user without the maintenance or malfunction of the device. For example, Japanese Unexamined Utility Model Publication No. Sho 62-33061 discloses that when the upper unit and the side cover are opened, the switch is turned off to stop the apparatus, and when both the upper unit and the side cover are closed, the switches are released and the device is released. An operable switch switching device is described.

In general, a copying machine, a facsimile, and the like are provided with two systems, an operation system electric circuit for driving electric components such as a motor, and a system system electric circuit for operating a system such as software. I have. These two electric circuits are required to have an order of cutoff and connection. That is, at the time of disconnection, the system electric circuit is cut off before the operation electric circuit, and at the time of connection, the operation electric circuit must be connected before the system electric circuit. This is because if the order is reversed, the operation of the main unit upper cover or side cover may be temporarily stopped while opening or closing, or the operating system electric circuit may be energized even though the system system electric circuit is energized. If a situation does not occur, the software of the device will judge as if it is a failure of the electrical components etc. attached to the device,
This is because a service call mark indicating failure repair is displayed on the device.

[0004]

In the above-mentioned conventional configuration, one switch is intermittently opened and closed according to opening and closing of the upper cover and side cover of the main body. It is difficult to develop sex. In addition, in the case of mass production of copying machines and the like, variations occur due to errors in parts and the like. When assembling devices with such members, dimensional errors are accumulated for each device, and the intended switch cutoff and connection timing is reduced. It is expected that it will not be possible to obtain it.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a first switch for connecting / disconnecting a system-related electric circuit and an operation-related electric circuit in order to provide a clear order to the disconnection / connection of two electric circuits. Side cover provided on each of a first bracket and a second bracket having the same rotation center as a second switch for connecting / disconnecting the first and second brackets, an engagement portion for operating the first switch on the second bracket, and supported to be openable and closable. And the upper cover of the main body presses both the first bracket and the second bracket in a direction in which the first and second switches respectively connect the system-related electric circuit and the operation-related electric circuit.
The urging means, which is set with an urging force larger than the circuit switching force of the switch, opposes the pressing directions on the first and second brackets, and imparts opposing rotation behavior to both brackets. A sliding mechanism is provided between the second bracket and the second bracket to transmit the operation of the upper cover of the main body to the second bracket.

Therefore, when the side cover is opened, the pressing force applied to the first bracket is reduced, and the first bracket is rotated by the urging force of the urging means, so that the engaging portion and the first switch are separated. When the opening of the side cover advances and the pressing force applied to the first bracket further decreases, the urging force of the urging means on the second bracket decreases, and the second bracket moves in a direction to turn off the second switch. When the side cover is closed, the first bracket rotates against the urging force of the urging means, and the second bracket also rotates via the urging means together with the first switch, so that the second switch is connected. With this second
The first switch is connected to the engagement portion of the bracket.

[0007] On the other hand, when the upper cover of the main body is opened, the second bracket having the engaging portion pressed against the urging force of the urging means is fixed to the first bracket by the urging force of the urging means.
Rotate away from the bracket. At this time, since the biasing means is set to a biasing force greater than the circuit switching force of the second switch, the second switch remains biased in the connection direction, and the first switch is biased in advance of the switch. And the engaging portion are separated from each other, and the first switch is turned off.

When the upper cover of the main body is closed, the second switch is pressed and connected via the sliding mechanism, and the second bracket is pressed against the urging means, so that the first switch in the fixed state is released. The connection is made by being pushed by the engagement portion.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A switch switching device according to the present invention includes a first bracket provided with a first switch for connecting / disconnecting a system electric circuit, and a second switch for connecting / disconnecting an operating electric circuit. When the side cover and the main body upper cover are closed, the second bracket is disposed on the same center of rotation so that the first switch and the second switch connect the system-related electric circuit and the operation-related electric circuit. The first bracket and the second bracket are pressed, and the first bracket and the second bracket are connected by biasing means having a biasing force greater than the circuit switching force of the first switch. Give the brackets opposing rotation habits. A sliding mechanism for transmitting the opening / closing operation of the main body upper cover to the second bracket is provided between the main body upper cover and the second bracket.

The first bracket is formed with a first member for mounting a first switch, a contact portion with a side cover, and a locking portion of a biasing means. A second member that supports the first member so as to be displaceable may be used. With this configuration, the position of the first switch provided on the first member can be displaced with respect to the engagement portion, so that the disconnection / connection timing of the first switch can be adjusted.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described in detail with reference to the drawings.

The switch switching device shown in FIG. 1 covers a side surface of a copying machine, which is an example of an image forming apparatus, and is supported by a device body (not shown) so as to be openable and closable. It is arranged in a copying machine S having a main body upper cover 2 supported on the main body by a shaft 8 so as to be openable and closable. The side cover 1 is opened when pivoted about the shaft 8 in the direction indicated by arrow E, and closed when pivoted in the direction indicated by arrow C. The main body upper cover 2 is opened when turned in the direction indicated by arrow D, and closed when turned in the direction indicated by arrow F. Side cover 1 and body upper cover 2
Fig. 1 shows a lock mechanism (not shown)
Is held in the closed state shown in FIG. In this example, the side cover 1 is held substantially vertically, and the main body upper cover 2 is held substantially horizontally.

The switch switching device individually connects a system electric circuit (not shown) and an operation electric circuit of the copying machine.
The first switch 3 and the second switch 4 to be cut off are mounted on the first bracket 5 and the second bracket 6, respectively.

The first switch 3 comprises a limit switch connected to a system-related electric circuit.
Is fixed substantially at the center. The switching lever 3a is movable up and down with respect to the first switch 3, and is provided with a return behavior of being raised as shown in FIG. 2 by a return mechanism (not shown) provided inside the switch. . The first switch 3 connects the system-related electric circuit when it is brought down as shown in FIG. 1, and shuts off the circuit when it comes up as shown in FIG.

The second switch 4 is composed of a push-type switch connected to an operation system electric circuit. The operation piece 4a is disposed above the second switch 4 and is fixed on the upper end of the second bracket 6 at the rotating end 6a. The second switch 4 urges the operation piece 4a upward by a spring (not shown), and connects an operation system electric circuit when it is pressed as shown in FIG.
As shown in FIG. 3, when the protruding state is reached, the circuit is shut off.

The first bracket 5 is made of sheet metal, and its base end 5a is rotatably supported by a shaft 9 fixed to a device body (not shown). The first bracket 5 has a contact portion 11 formed on a left end portion 5b thereof and a spring hooked portion 12 formed on a rotating end 5c side thereof, which is bent toward the paper surface. The contact portion 11 comes into contact with a protrusion 1a integrally formed on the inner surface of the lower portion of the side cover 1, and is gradually pressed as the cover 1 rotates in the direction of arrow C.

The second bracket 6 is made of sheet metal and is provided so as to overlap the first bracket 5. The second bracket 6
The base end of the shaft 9 is rotatably supported by the shaft 9 and has the same rotation center as the first bracket 5. Spring hook part 1
A spring hook portion 13 is formed to be bent at a portion of the second bracket 6 facing the second bracket 6. A bent projection 14 is formed on a central upper edge 6b of the second bracket 6 as an engagement portion that comes into contact with and presses the switching lever 3a. A bending stopper 23 is formed integrally with the edge of the second bracket 6 near the spring hook 13. The bending stopper 23 is disposed on the track below the pivoting end 5c of the first bracket, and the arrow A of the first bracket 5
The rotation in the direction is regulated.

The two ends 10a, 10b of the coil spring 10 serving as urging means are locked to the spring hooks 12, 13, respectively. This coil spring 10
The bracket 5 and the second bracket 6 are provided with a rotating behavior in opposite directions, respectively.
Are connected elastically. That is, the first bracket 5
, A biasing force is applied to the second bracket 6 in a clockwise direction indicated by an arrow A about the axis 9 and to the second bracket 6 in a counterclockwise direction indicated by an arrow B about the axis 9. The urging force of the coil spring 10 is set to be slightly larger than the urging force applied to the operating piece 4a of the second switch 4.

First bracket 5 and second bracket 6
When the side cover 1 and the main body upper cover 2 are in the closed state shown in FIG. 1, the side cover 1 is pressed against the urging force of the coil spring 10 and is held in a substantially horizontal state.

Above the second switch 4, a sliding mechanism 15 for transmitting the opening and closing operation of the main body upper cover 2 to the switch 4 is provided.
Is arranged. The sliding mechanism 15 includes a large-diameter guide pin 16 and a small-diameter guide pin 17 fixed to an apparatus main body (not shown), and a slider 18 slidably supported by the pins 16, 17. In this example, it slides up and down in the drawing. Slider 18
Has a projection 19 formed on its bottom 18a to press the upper surface of the second switch 4, and the lower end 18b presses the operating piece 4a. An operating plate 20 is provided on the inner surface 2a of the main body upper cover 2 facing the slider 18.
Are protruding toward the inside of the device. This operating plate 20
FIG. 1 shows the slider 18 when the main body upper cover 2 is fully closed.
Has a height to push down to the lowest position shown in FIG.

A stopper member 21 is fixed to the main body (not shown) below the second bracket 6, and restricts the rotation of the second bracket 6 in the direction of arrow A. Above the second bracket 6, a main body case 22 is arranged close to the second bracket 6, and when the bracket 6 rotates in the direction of arrow B, it comes into contact with the central upper edge 6b, and the bracket 6 rotates in the direction of arrow B. Regulations are in place.

The operation of the switch switching device having such a configuration will be described. In FIG. 1, both the side cover 1 and the main body upper cover 2 are fully closed by a lock device (not shown). At this time, the slider 18 is pushed down to the lowest position by the operation plate 20 provided on the main body upper cover 2, and pushes down the second switch 4 fixed to the second bracket 6 by the projection 19 of the bottom 18a. First
On the bracket 5 side, the protrusion 1 a of the side cover 1 is pressed against the contact portion 11.

Accordingly, the coil spring 10 locked by the spring hooks 12 and 13 is extended to give the first bracket 5 a turning behavior about the shaft 9 in the direction of arrow A,
The second bracket 6 is given a rotating behavior in the direction of arrow B about the axis 9. In such a state, the switching lever 3a is pressed by the bending projection 14, and the operating piece 4a
Is pressed by the lower end face 18b, so that a system electric circuit (not shown) and an operation electric circuit are connected.

(Switch switching operation accompanying opening / closing of the main body upper cover) When the lock device (not shown) is released and the main body upper cover 2 is rotated in the direction of arrow D which is the opening direction as shown in FIG. 20 moves upward. With this movement, the pressing force transmitted to the second bracket 6 via the slider 18 is weakened, and the urging force of the coil spring 10 causes the second bracket 6 to start rotating about the shaft 9 in the direction of arrow B. Here, the second of the coil spring 10
The urging force on the bracket 6 is set to be larger than the upward urging force (switch switching operation force) applied to the operation piece 4 a, so that the upper surface of the second switch 4 moves the slider 18 upward without separating from the protrusion 19. Slide to Therefore, the operation piece 4a pressed by the lower end portion 18b of the slider 18 remains pressed, and the connection state of the operation system electric circuit is continued.

When the second bracket 6 rotates in the direction of arrow B, the bending projection 14 also moves integrally, so that the pressing on the switching lever 3a is released, and the system electric circuit is shut off.

As shown in FIG. 3, when the opening of the main body upper cover 2 further proceeds, the second bracket 6 continues to rotate in the direction of arrow B (counterclockwise) by the action of the coil spring 10, and 8b abuts on the main body case 22 to restrict its rotation. Regardless of this, body upper cover 2
Is continued, the operation plate 20 moves away from the slider 18. By this operation, the pressing force of the second switch 4 on the operating piece 4a is released, and the operating piece 4
Is in a protruding state, and the operation system electric circuit is shut off. In addition, the slider 18 is pushed up to the uppermost position shown in FIG. 3 by the projection output of the operating piece 4a.

When the opened main body upper cover 2 is turned in the closing direction indicated by arrow F, the operation plate 20 comes into contact with the slider 18 at the uppermost position. When the swinging of the buggy 2 is continued, the slider 18 descends as shown in FIG. 2, and the lower end portion 18b presses the operating piece 4a, so that the operating system electric circuit is connected. Further, when the main body upper cover 2 is rotated, the protrusion 19 of the slider 18 is moved to the second switch 4.
Is pressed to rotate the second bracket 6 about the shaft 9 in the direction of arrow A. Then, as shown in FIG.
The bending lever 14 presses the switching lever 3a, and the system electrical circuit is connected.

(Switch switching operation accompanying opening / closing of side cover) The side cover 1 held in the fully closed state shown in FIG. 1 by releasing the lock device is opened around the shaft 8 as shown in FIG. , The protrusion 1a moves to the left. Then, the first bracket 5 rotates around the shaft 9 in the direction of arrow A (clockwise) by the action of the coil spring 10. As a result, the switching lever 3a is released from being pressed by the bending projection 14 provided on the second bracket 6, and the system-related electric circuit is shut off. At this time, since the spring force of the coil spring 10 set to be larger than the switch switching operation force of the second switch 4 is acting on the second bracket 6, the operation piece 4 a is kept pressed by the slider 18. State, and the operating system electric circuit is placed in the connected state.

When the rotation of the side cover 1 proceeds and the side cover 1 is further opened, and the projection 1a of the side cover 1 is completely separated from the contact portion 11 of the first bracket 5 as shown in FIG. Coil spring 10 locked to 13
Is contracted, and the rotating end 5c of the first bracket 5 and the bending stopper 23 come into contact with each other. For this reason, the rotation behavior of the first bracket 5 by the coil spring 10 does not work, and the first bracket 5 and the second bracket 6 are substantially integrated. The integrated first and second brackets 5,
6 falls by its own weight around the shaft 9 in the direction of arrow A, and the stopper 21 comes into contact with the lower end 6d of the rotating end of the second bracket 6, and the rotating and dropping stops. The second at this time
By the movement of the bracket 6, the position of the second switch 4 is lowered, the pressing of the slider 18 on the operation piece 4a is released, and the operation system electric circuit is cut off.

It is preferable that the stopper 21 is disposed at a position where the second bracket 6 is rotated to a position where at least the second switch 4 can be reliably turned off and the operation system electric circuit can be cut off. Further, it is preferable that the slider 18 be set to a position or a stroke at which the second bracket 6 is rotated to a position where at least the second switch 4 can be reliably turned off and the operation system electric circuit can be cut off.

As shown in FIG. 5, when the opened side cover 1 is rotated in the closing direction indicated by the arrow C, the protrusion 1
a contacts the contact portion 11 of the first bracket 5 as shown in FIG. In this state, since the urging force of the coil spring 10 does not work, by continuing the rotation of the side cover 1, both brackets are pushed up by the projections 11 about the shaft 9. At this time, since the slider 18 is pushed down to the lowermost position by the operation plate 20, when the second bracket 6 is pushed up, the operation piece 4a is pressed by the lower end portion 18b of the slider 18 and the projection 19 is moved. It comes into contact with the upper surface of the second switch 4, and the operation system electric circuit is in a connected state.

When the projection 19 contacts the second switch 4, the rotation of the second bracket 6 is prevented, and thereafter, only the first bracket 5 can rotate about the shaft 9 in the direction of arrow B. Becomes Side cover 1 from this state
Is rotated in the direction of arrow C, only the first bracket 5 is rotated with respect to the second bracket 6 in the fixed state, and the coil spring 10 is extended, and the arrow with respect to the first bracket 5 and the second bracket 6 is turned. The urging force in the A and B directions is charged. When the rotation of the side cover 1 is continued,
The switching lever 3a on the first bracket 5 is pressed by the bent projection 14, and the system-related electric circuit is connected.

Next, a second embodiment of the present invention will be described mainly with reference to FIGS.
An embodiment will be described. In this embodiment, the position of the first switch 3 can be adjusted by changing the configuration of the first bracket in the first embodiment, and the basic configuration is the same as that of the first embodiment. Therefore, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will not be repeated.

A first bracket 50 of the switch switching device shown in FIG. 6 includes a first member 51 on which the first switch 3 is mounted.
And a contact portion 11 'and a spring hooking portion 12', which support the first member 51 so as to be able to swing and contact the projection 1a of the side cover 1 to receive the transmission of rotational power (pressing force). And the second member 52.

As shown in FIG. 7, the first member 51 is provided with bearing holes 53A and 53B for bending the base end 51a in a U-shape and for inserting the shaft 9 therethrough. From the center to the other end of the first member 51, the first switch 3 is fixed with a screw 54. The first switch located below the first switch 3
The part of the member 51 is bulged compared to other parts,
An arc-shaped elongated hole 55 centered on the bearing holes 53A, 53B.
Are formed to extend in the rotation direction of the first bracket 50.

The base end 52a of the second member 52 is bent in a U-shape, and has bearing holes 56A, 56 through which the shaft 9 is inserted.
B is perforated. Distance H between bearing holes 56A and 56B
Are formed wider than the distance h between the bearing holes 53A and 53B, and the shaft 9 is provided with the respective bearing holes 53A, 53B, 56A and 56B.
When B is inserted, the first member 51 is rotatable about the shaft 9 on the second member 52. Below the bearing hole 56B, the contact portion 11 'is bent downward. The spring hooking portion 12 ′ is formed to bend toward the paper surface direction at the rotating end 52 b of the second member 52 facing the bearing holes 56 </ b> A, 56 </ b> B.
0a is locked. Spring hook 12 '
A screw hole 57 is provided in a portion between the bearing hole 56B and the slot 55, and a portion corresponding to the slot 55 is provided therethrough.
The first member 51 is fastened to the second member 52 by screwing the screw 59 from the fifth side via the spring washer 58, and the two are integrated.

In the switch switching device having such a configuration, since the biasing force in the direction of arrow A is applied to the first bracket 50 by the coil spring 10, the side cover 1 and the main body upper cover 2 are connected by solid lines in FIG. Are rotated in the open directions indicated by arrows C and D from the position indicated by the arrow, the pressing state between the switching lever 3a of the first switch 3 and the bent projection 14 is changed to the operation of the second switch 4 as in the first embodiment. It is released earlier than the pressed state of the piece 4a and the lower end 18b of the slider 18, and the system electric circuit is interrupted earlier than the drive electric circuit.

When the opened side cover 1 and the main body upper cover 2 are rotated in the closing directions indicated by arrows E and F, the switching lever 3 of the first switch 3 is turned on.
a is released later than the pressed state between the operating piece 4a of the second switch 4 and the lower end 18b of the slider 18, and the system electric circuit is connected later than the drive electric circuit. Will be done.

On the other hand, the first bracket 50 is formed by superimposing the first member 51 and the second member 52 to which the first switch 3 is fixed, so that the shaft 9 is inserted through the bearing holes 53A, 53B, 56A, 56B. It is rotatably supported by the device body that is not used. Next, one end 10a of the coil spring 10 is locked to the spring hook portion 12 'of the second member 52, and the projection 1a is brought into contact with the engaging portion 11'. In this case, the second member 52 also receives the urging force of the coil spring 10 against the first bracket 50 and the turning power of the projection 1a. After setting the second member 52 in such a state, the first member 51 is rotated to switch the first switch 3 to the bending engagement portion 14 provided on the second bracket 6 by the switching lever 3a.
When the position is determined, the screw 59 is passed through the spring washer 58 and screwed into the screw hole 57 from the long hole 55 when the position is determined.

When the first switch 3 is not easily cut, the screw 59 is loosened and the first member 51 is turned to rotate the
By adjusting the position of the switching lever 3a with respect to the position 4 and tightening the screw 59, the first switch 3 can be arranged at an optimum position.

As described above, the first member 51 to which the first switch 3 is fixed is moved to the second member 5 to which the urging force or the pressing force is applied.
The position of the first switch 3 can be easily adjusted by separately and rotatably mounting the first switch 3. Therefore, it is possible to absorb dimensional errors such as variations in devices, variations in components, distortions, and the like, which is effective in preventing malfunction of the first switch 3. As a result, the switch switching device functions stably, which leads to stable operation of equipment using the switch switching device, and also improves workability.

[0042]

According to the present invention, when the side cover or the upper cover of the main body is opened, the system electric circuit is always released before the operation electric circuit, and when the side cover or the upper cover of the main body is closed, the operation electric circuit is closed. Are always connected before the system-related electric circuits, so that the operation-related electric circuits are always connected when the system-related electric circuits are connected. Therefore, even if the side cover or the upper cover of the main body is opened and closed during operation of the device, malfunction of the electric circuit is eliminated,
It becomes a stable switch switching device.

Further, according to the present invention, since the position of the first switch for cutting / cutting off the system-related electric circuit can be adjusted, the switch can be reliably set even if there is variation in each device or dimensional error of parts. Switching can be performed, and the image forming apparatus can be operated stably.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a switch switching device according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating a state of a switch switching device in an initial rotation of a main body upper cover.

FIG. 3 is a diagram showing the operation of the switch switching device when the rotation of the upper cover of the main body advances.

FIG. 4 is a diagram showing a state of a switch switching device at an initial stage of rotation of a side cover.

FIG. 5 is a diagram illustrating the operation of the switch switching device when the rotation of the side cover advances.

FIG. 6 is an overall configuration diagram of a switch switching device according to a second embodiment of the present invention.

FIG. 7 is an exploded perspective view showing a configuration of a first bracket which is a main part of the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Side cover 2 Main body upper cover 3 1st switch 4 2nd switch 5,50 1st bracket 6 2nd bracket 4 2nd switch 10 Energizing means 11,11 'Contact part 12,12', 13 Locking part ( Spring hook part) 14 Engagement part 15 Sliding mechanism 51 First member 52 Second member

Claims (2)

[Claims] 1. A first switch having a rotation center disposed at an end and a first switch for connecting / disconnecting a system electric circuit.
A bracket, and the same rotation center as the first bracket is disposed at an end,
A second bracket for connecting / disconnecting an operation system electric circuit is provided, and a second bracket provided with an engagement portion for operating the first switch; and both the first switch and the second switch are connected to the system system electric circuit. An openable and closable side cover and a main body upper cover for pressing both the first bracket and the second bracket in a closed state in a direction in which a circuit and an operation system electric circuit are connected, and the first bracket and the second bracket. An urging means which is stopped and opposes the pressing direction to both brackets, imparts opposing rotation behavior to the first and second brackets, and is set to an urging force larger than the circuit switching force of the first switch. A sliding mechanism that is provided between the main body upper cover and the second bracket and transmits opening and closing operations of the main body upper cover to the second bracket; Switch actuator comprising. 2. The first bracket includes a first member on which the first switch is mounted, a contact portion between the first cover and the side cover, and a locking portion of the urging means. The switch switching device according to claim 1, further comprising a second member that is displaceably supported with respect to the engaging portion provided on the second bracket.