JPH05290663A - Switch circuit - Google Patents

Abstract

PURPOSE:To reduce the number of harnesses and to provide a switch circuit that does not raise the cost even if it is applied to a multi-transmission system. CONSTITUTION:When a common terminal of operational switches 11-13 is connected to contact points B, E, any motor to be driven by switches 10e, 10f is chosen from motors 2-4, and the motor thus chosen is rotated normally or in reverse according to the operation of the switches 10c, 10d. When the switches 10c, 10d are grounded while the contact point B of the operational switches 12, 13 is chosen by the switches 10e, 10f, contact points A, E of the operational switches 11-13 are grounded, and contact points C, D are connected to a driving power source, and the motors 2-4 are rotated normally or in reverse according to the operation of switches (a), (b).

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to a switch circuit suitable for use in controlling on-vehicle electrical equipment such as a power window.

[0002]

2. Description of the Related Art As is well known, recent electric vehicles are equipped with various electric components. Among them, for example, a power window function for opening and closing a "window" according to a switch operation is put into practical use. ing. FIG. 2 is a circuit diagram showing a configuration example of a switch circuit for controlling this power window.

In FIG. 2, reference numerals 1 to 4 denote power window motors (hereinafter abbreviated as motors) that open and close windows by rotating in the forward and reverse directions in response to switch operations described later. Here, the motor 1 opens and closes the driver seat side window, the motor 2 opens and closes the passenger seat side window, the motor 3 opens and closes the rear seat left side window, and the motor 4 opens and closes the rear seat right side window. It is like this.

Reference numerals 5 to 8 denote operation switches provided inside the seat doors corresponding to the motors 1 to 4, respectively. The operation switch 5 arranged on the driver's seat side (hereinafter, referred to as a driver's seat switch) includes switches 5a to 5h and a main switch MSW. In the driver's seat switch 5, first, the power supply line of the motor 1 is connected to the common terminals of the switches 5a and 5b, and one of the bidirectional contacts of the switches 5a and 5b is connected to the fuse F.
It is connected to the drive power source + Vd via S, and the other is grounded.

In such a structure, when the switch 5a is connected to the drive power source side and the switch 5b is grounded, a drive current flowing from the switch 5a side to the switch 5b side is given to the motor 1. On the contrary,
The contact of the switch 5a is grounded and the switch 5b
When the contact is connected to the drive power source side, a drive current from the switch 5b side to the switch 5a side is given to the motor 1. As a result, the motor 1 rotates in the normal / reverse direction according to the operation of the switches 5a and 5b, and the window on the driver's seat side is opened / closed.

Further, one of the bidirectional contacts in the switches 5c to 5h has a driving power source + Vd via the fuse FS.
And the other is grounded via the main switch MSW. The common terminals of the switches 5c to 5h are connected to one of the bidirectional contacts of the operation switches 6 to 8, respectively. That is, the switch 5c,
The common terminal of 5d is connected to one of the bidirectional contacts of the switches 6a and 6b, respectively, and the other of the bidirectional contacts of the switches 6a and 6b is connected to the drive power source + Vd. Similarly, the common terminals of the switches 5e and 5f are connected to one of the bidirectional contacts of the switches 7a and 7b, respectively, and the other of the bidirectional contacts of the switches 7a and 7b is connected to the drive power source + Vd. Further, the common terminals of the switches 5g and 5h are connected to one of the bidirectional contacts of the switches 8a and 8b, respectively, and the other of the bidirectional contacts of the switches 8a and 8b is connected to the drive power source + Vd.

Therefore, the main switch MSW is set to the ON state, and as shown in the figure, the switches 6a ...
When each of the bidirectional contacts 8b is connected to the common terminal of the switches 5c to 5h, the motor 2 rotates in the forward and reverse directions according to the operation of the switches 5c and 5d, and the motor 2 corresponds to the operation of the switches 5e and 5f. 3 reverses normally. In addition, switch 5
The motor 4 rotates forward and backward in response to the operation of g and 5h. As a result, the windows of each seat can be opened and closed even from the driver's seat.

On the other hand, when the main switch MSW is set to the ON state and the other of the bidirectional contacts of the switches 5c to 5h is grounded as shown in the figure, the operation of the switches 6a and 6b is performed. The motor 2 is rotated in the normal and reverse directions, and the motor 3 is rotated in the normal and reverse directions in response to the operation of the switches 7a and 7b. Further, the motor 4 is rotated in the forward and reverse directions according to the operation of the switches 8a and 8b. As a result, the windows can be opened and closed independently for each seat. In this switch circuit, a unit 9 including the motor 1 and the driver's seat switch 5 is installed inside the driver's seat side door.

[0009]

By the way, in the above-mentioned conventional switch circuit, the unit 9 is often arranged inside the driver's door. Therefore, in order to open and close the "window" of each seat from the driver's seat and also to open and close the "window" of each seat individually, it is installed inside each seat door from the inside of the driver's door through the vehicle body. Wiring to the motors 1 to 4 is required, and in this case, eight wire harnesses are required.

The wire harness routed inside the vehicle body is
Not only for the above-mentioned power windows, but also for controlling many electric components such as door lock control, remote control mirror control or courtesy lamp control. There are dozens of harnesses wired to the vehicle body. And such a large number of wires not only deteriorates workability such as harness wiring work and connector connection work, but also
It is desired to reduce the number of harnesses as much as possible because it causes an increase in vehicle body weight and makes it difficult to close the driver side door.

Therefore, in recent years, a so-called multiplex transmission system has been developed which is capable of reducing the number of wire harnesses routed in a vehicle together with the electronic control of vehicle-mounted electric components. In this multiplex transmission system, a plurality of multiplex units provided corresponding to various electrical components are connected to a bus line, and each electrical component is controlled based on the message exchange between the multiplex units performed via the bus line. It is something. That is, the multiplex unit receives a message that is multiplex-transmitted from another multiplex unit via the bus line, and controls the electrical component connected to itself according to the content of the received message.

In such a multiplex transmission system, in order to realize the above-mentioned power window control, a message corresponding to the operation of the switch 5 is sent from the multiplex unit U1 in which the driver's seat switch 5 is arranged. Two
To the multiplex multiplex unit U2 which controls ~ 4. As a result, the multiplex unit U2 that receives the message controls the power window motors 2 to 4 according to the message. In this case, the number of harnesses wired from the multiplex unit U1 provided inside the driver's seat door to the multiplex unit U2 on the vehicle side can be reduced.

However, in the multiplex unit U2, in order to individually control the motors 2 to 4, it is necessary to newly provide a switching element corresponding to each operation switch 6 to 8. That is, when the conventional switch circuit is applied to the multiplex transmission system, the number of switching elements provided in the switch circuit is newly required, resulting in a high product cost of the multiplex transmission system itself. There is. The present invention has been made in view of the above-mentioned circumstances, and it is possible to reduce the number of harnesses wired from the inside of a driver's door to the vehicle body side, and moreover, even if it is applied to a multiplex transmission system, a switch that does not cause a cost increase It is intended to provide a circuit.

[0014]

SUMMARY OF THE INVENTION The present invention includes three of A to C.
It is composed of a switch a having a contact and a switch b having two contacts D to E, the contacts A and E are commonly connected, a driving power is applied to the contacts C and D, and the switches a, It is composed of first to third operating means in which a load is connected between the common terminals of b, and first and second switches in which driving power is supplied to one of the bidirectional contacts and the other is grounded. Switching means in which a common terminal of the first switch is connected to each contact E of the first to third operating means, and one of the bidirectional contacts is a contact B of the first operating means. And the other is connected to the second
A third switch connected to the contact B of the operating means, and one of the bidirectional contacts connected to the common terminal of the third switch, and the other connected to the contact B of the third operating means. And a switch comprising four switches,
The common terminal of the switch and the common terminal of the second switch are connected to each other.

[0015]

According to the above construction, when the common terminals of the switches a and b in the first to third operating means are connected to the contacts B and E, respectively, the selecting means operates the first to third operating means. One of the loads connected to the selected load is selected, and the switching means applies the drive power to the selected load in different current directions. On the other hand, when the switching means is in the grounded state and the selecting means selects the contact B of the second to third operating means, the contacts A and E of the first to third operating means are grounded,
Since the contacts C and D are connected to the driving power supply,
A drive current is supplied according to the operation of the switches a and b.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram showing the configuration of an embodiment according to the present invention. In this figure, parts that are the same as the parts in FIG. 2 are given the same numbers, and explanations thereof are omitted. The difference between the embodiment shown in this figure and that shown in FIG. 2 is that the motor 2 to 4 is conventionally controlled independently of each other. It is configured to selectively control.

In FIG. 1, reference numeral 10 denotes a driver's seat switch which is composed of switches 10a to 10f having bidirectional contacts and a main switch MSW and which is disposed inside the driver's seat side door. In this driver's seat switch 10, first,
The switches 10a and 10b are the above-mentioned switches 5a and 5b.
Similar to (see FIG. 2), the power supply line of the motor 1 is connected, one of the bidirectional contacts is connected to the drive power supply + Vd via the fuse FS, and the other is grounded. As a result, the motor 1 rotates in the forward / reverse direction according to the operation of the switches 10a and 10b, and the window on the driver's seat side is opened / closed.

In the switch 10c, the contact T1 side is connected to the drive power source + Vd via the fuse FS, and the contact T2 side is grounded via the main switch MSW. Also,
The common terminal CT of the switch 10c is connected to each contact E of the operation switches 11 to 13 described later. Similar to the switch 10c, the switch 10d has a contact T1 side connected to the drive power source + Vd via the fuse FS and a contact T2 side grounded via the main switch MSW, and its common terminal CT is a common terminal of the switch 10e. It is connected to the. In the switch 10e, the contact T2 is connected to the contact B of the operation switch 13 described later, while the contact T1 is connected to the common terminal CT of the switch 10f. In this switch 10f, the contact T1 is the operation switch 1
1 is connected to the contact B, and the contact T2 is connected to the contact B of the operation switch 12.

The operation switch 11 comprises a switch 11a having three-way contact points A to C and a switch 11b having two-way contact points D and E, and the motor 2 is connected between common terminals. .. Also, the operation switch 1
Similarly to the operation switch 11, the contacts 2 to 13 are contacts A to C.
And a switch having two-way contacts D and E, and the motors 3 and 4 are connected between their common terminals.

In the switch 11a, the contact A is connected to the contact E of the switch 11b, and the contact C is connected to the drive power source + Vd via the fuse FS together with the contact D of the switch 11b. Similarly, in the switch 12a, the contact A is connected to the contact E of the switch 11b, and the contact C is connected to the drive power source + Vd via the fuse FS together with the contact D of the switch 12b.
Further, also in the switch 13a, the contact A is connected to the contact E of the switch 13b, and the contact C is connected to the drive power source + Vd via the fuse FS together with the contact D of the switch 13b.

Next, the operation of the switch circuit having the above configuration will be described. Here, for example, the main switch MSW described above is in the ON state, and the operation switches 11 to 13 are in the illustrated state, that is, one common terminal of the switches 11 to 13 is connected to the contact B and the other is The operation of rotating any one of the motors 2 to 4 in the forward / reverse direction in response to the operation of the switches 10c to 10f when the common terminal of 1 is connected to the contact E will be described.

First, when the common terminal CT of the switch 10c is connected to the contact T2 side and each common terminal CT of the switches 10d to 10f is connected to the contact T1 side, the drive power source + Vd is applied to the contact B of the operation switch 11. Contact point E
Becomes grounded. On the other hand, on the contrary, the switch 10
When the common terminal CT of c is connected to the contact T1 side, the common terminal CT of the switch 10d is connected to the contact T1 side, and the common terminals CT of the switches 10e and 10f are connected to the contact T1 side, respectively, the operation switch 11 contacts E
Is applied with the drive power source + Vd, and the contact B is grounded.

As a result, the motor 2 can be rotated in the normal / reverse direction from the driver's seat switch 5 side. in this way,
The switch 10c switches the contact E of the operation switches 11 to 13 to "H (driving voltage applied state)" or "L (grounded state)", and the switch 10d switches the operation switches 11 to 11.
The contact B of 13 is switched to the "H" state or the "L" state. The switches 10e and 10f are the operation switch 1
One of the contacts E of 1 to 13 is selected.

Next, the case where the motors 2 to 4 are individually controlled according to the operation of the operation switches 11 to 13 will be described. Note that, here, it is assumed that the main switch MSW is set to the ON state, and that each common terminal CT of the switches 10c to 10f is connected to the contact T2. In this case, each contact E and each contact A of the operation switches 11 to 13 are grounded via the switch 10c and are "L".
On the other hand, each contact C and each contact D of the switches 11 to 13 is driven by the drive voltage + V via the fuse FS.
d is applied and is set to the “H” state. Therefore, for example, in order to rotate the motor 3 in the normal direction or the reverse direction, the common terminals of the switches 12a and 12b are connected to the contacts B and E, or the contacts A and D, respectively. This is also the case with the other operation switches 11 and 13, and the same operation causes the motors 2 and 4 to rotate in the forward and reverse directions.

As described above, in the above embodiment, since the switch circuit is configured so as to selectively control the forward rotation / reverse rotation of any of the motors 2 to 4, the operation switches 11 to 11 are selected.
The number of wire harnesses wired between 13 and the driver's seat switch 10 can be reduced from the conventional 8 to 6. As described above, the reason why the motors 2 to 4 are selectively used is that it is extremely rare that the power window and the door lock are simultaneously performed. In fact, the simultaneous operation is performed during the one-touch power window operation. It is possible, but since the energization time to the door lock motor is as short as 0.5 seconds, both functions can be achieved by time sharing without impairing the original function (0.5 during power window operation). Stop for seconds).

When the switch circuit according to the above-mentioned embodiment is applied to the above-mentioned multiplex transmission system, conventionally, in the driver's seat switch 10, six switching elements are required in terms of transfer type relays.
It becomes possible to deal with four pieces of 10f. As described above, the number of switching elements to be newly provided can be reduced, so that the product cost of the multiplex transmission system is not increased, and the effectiveness of the system can be fully utilized. Further, according to the above-described embodiment, since the switch circuit is configured to selectively control the forward rotation / reverse rotation of any one of the motors 2 to 4, only one fuse FS is required and the circuit protection is simple. Be converted.

[0027]

As described above, according to the present invention, when the common terminals of the switches a and b in the first to third operating means are connected to the contacts B and E, respectively, the selecting means operates. Any one of the loads connected to the first to third operating means is selected, and the switching means applies the driving power source to the selected load in different current directions. On the other hand, when the switching means is in the grounded state and the selecting means selects the contact B of the second to third operating means, the contacts A and E of the first to third operating means are grounded and the contact C. , D are connected to the drive power source, a drive current corresponding to the operation of the switches a, b is supplied to each load, so that the number of harnesses wired from the inside of the driver's seat door to the vehicle body side can be reduced. Moreover, in this case, the number of switch elements newly required can be reduced even when applied to the multiplex transmission system, so that the cost does not increase.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a configuration of an embodiment according to the present invention.

FIG. 2 is a diagram for explaining a conventional example.

[Explanation of symbols]

1 to 4 ... Power window motor (load), 5 ... Driver's seat switch, 10c, 10d ... Switching means (first and second switches), 10e, 10f ... Selection means (third and fourth switches), 11 ˜13 ... Operation switch (first to third operation means), 11a to 13a ... Switch (switch a), 11b to 13b ... Switch (switch b), AE ... Contacts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyotsugu Ohba 1-5-1, Kiba, Koto-ku, Tokyo Fujikura Electric Wire Co., Ltd.

Claims (1)

[Claims] 1. Switches a and D having three contacts A to C.
To a switch b having two contacts E, the contacts A and E are commonly connected, drive power is applied to the contacts C and D, and a load is applied between the common terminals of the switches a and b. A first to third operating means connected to each other, and a first and a second switch in which driving power is supplied to one of the bidirectional contacts and the other is grounded. The common terminal of the first switch is the first to third
Switching means connected to each contact E of the operating means, and one of bidirectional contacts connected to the contact B of the first operating means and the other connected to the contact B of the second operating means. 3 switch and one of the bidirectional contacts, one of which is connected to the common terminal of the third switch and the other of which is connected to the contact B of the third operating means. The common terminal of the fourth switch and the second terminal
And a selecting means formed by connecting to a common terminal of the switch.