Light source control device

Abstract

Disclosed is a light source control device capable of reliably controlling the lighting of a light source. The device comprises: a relay switch (10) arranged between a first power source of a vehicle and the light source; and a relay coil (12) arranged between a second power source that is turned on before the first power source and an operation switch (13) switched according to the operation of the vehicle. The relay switch (10) is switched to an off state by energizing. When the operation switch (13) is in an off state, the energization to the relay coil (12) is cut off, and power is supplied from the first power source to the light source via the relay switch in the on state. When the operation switch (13) is in an on state, power is supplied from the second power source to the relay coil (12), and the relay switch (10) is switched to an off state, thereby stopping the supply of power from the first power source to the light source.

Description

Technical Field

[0001] The present disclosure relates to a light source control device. Background Art

[0002] At present, a light source control device for controlling a light source is actually used. Various light sources such as headlights and daytime running lights are arranged in a vehicle, and these light sources need to be controlled according to their purpose.

[0003] Therefore, as a technology for controlling the daytime running lamp, for example, Patent Document 1 discloses a vehicle decorative component that determines whether it is daytime based on information from a sunlight sensor or the like and controls lighting of the daytime running lamp based on the determination result.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2019-38315 Summary of the invention

[0007] However, since the vehicle decorative component of Patent Document 1 is not controlled according to the operation of the vehicle, the daytime running lamp may still be turned on when the vehicle is parked, for example.

[0008] An object of the present disclosure is to provide a light source control device that reliably controls lighting of a light source.

[0009] Technical solutions to the problem

[0010] The light source control device provided by the present invention includes: a relay switch, which is arranged between a first power source and a light source of a vehicle; and a relay coil, which is arranged between a second power source that is turned on before the first power source and an operation switch that is switched according to the operation of the vehicle, wherein the relay switch is switched to an off state by energizing, and when the operation switch is in an off state, the power supplied to the relay coil is cut off, and power is supplied from the first power source to the light source via the relay switch in an on state, and when the operation switch is in an on state, power is supplied from the second power source to the relay coil, and the relay switch is switched to an off state, thereby stopping the power supply from the first power source to the light source.

[0011] Effects of the Invention

[0012] According to the present disclosure, lighting of the light source can be reliably controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a diagram showing the structure of a vehicle including a light source control device according to an embodiment of the present disclosure.

[0014] Figure 2 2 is a diagram showing the structure of a light source control device.

[0015] Figure 3 This is a diagram showing the structure of a light source control device that cannot control the instantaneous lighting of the daytime running lamp.

[0016] Figure 4 A diagram showing the connection state of the relay circuit when the key operation portion is switched to the "ON" position.

[0017] Figure 5 A diagram showing the connection state of the relay circuit when the parking brake is released.

[0018] Figure 6 A diagram showing a structure of a modified example of the light source control device. DETAILED DESCRIPTION

[0019] Hereinafter, embodiments of the present disclosure will be described based on the drawings.

[0020] Figure 1 2 shows a structure of a vehicle equipped with a light source control device according to an embodiment of the present disclosure. The vehicle includes a cab 1, a loading unit 2, an operation unit 3, headlights 4, daytime running lights 5, and a light source control device 6. Examples of the vehicle include commercial vehicles such as trucks.

[0021] The cab 1 is for passengers to ride in, and is disposed at the front part of the vehicle.

[0022] The loading section 2 is used to load cargo, for example, and is disposed at the rear of the vehicle relative to the cab 1 .

[0023] The operation unit 3 is used by the driver to operate various parts of the vehicle, and is disposed at the driver's seat of the cab 1. The operation unit 3 includes, for example, a steering part, a key operation unit, and a parking brake.

[0024] The headlight 4 is a so-called headlamp, and is disposed in front of the cab 1. The headlight 4 is lit at night by, for example, an operation of the driver to improve the visibility of the driver.

[0025] The daytime running lamp 5 is a so-called daytime running lamp, which is turned on during the day to improve the recognition of the vehicle relative to the surrounding environment. The daytime running lamp 5 is arranged below the headlight 4 and is turned on at a brightness lower than the brightness of the headlight 4. The daytime running lamp 5 can be composed of a light emitting diode (LED) lamp, for example.

[0026] The light source control device 6 is connected to the operation unit 3 and the daytime running lamp 5 , respectively, and controls lighting of the daytime running lamp 5 according to the operation of the operation unit 3 .

[0027] Next, the structure of the light source control device 6 will be described in detail.

[0028] like Figure 2 As shown, the light source control device 6 has: a fuse 8a connected to the ignition power supply 7a of the vehicle, and a fuse 8b connected to the accessory power supply 7b of the vehicle. The fuse 8a is connected to the relay switch 10 through the wiring 9a, and the relay switch 10 is connected to the daytime running lamp 5. In addition, the fuse 8a is connected to the protection diode 11a and the relay coil 12 in sequence through the wiring 9b branching from the wiring 9a, and the relay coil 12 is connected to the operation switch 13 connected to the parking brake 3b of the vehicle. In addition, a relay resistor 14 is connected in parallel to the relay coil 12. On the other hand, the fuse 8b is connected to the wiring 9b through the protection diode 11b through the wiring 9c, thereby connected to the relay coil 12.

[0029] Among them, the key operating part 3a of the operating part 3 is used to turn on the power of the vehicle to drive the engine, and is formed to be switchable to the "LOCK (lock)" position, the "ACC (accessory power)" position, the "ON (full vehicle power)" position and the "START (start)" position. When the key operating part 3a is switched to the "LOCK" position, the power supply device of the vehicle including the ignition power supply 7a and the accessory power supply 7b is cut off, and the engine is stopped. When the key operating part 3a is switched to the "ACC" position, the accessory power supply 7b is turned on. When the key operating part 3a is switched to the "ON" position, the ignition power supply 7a is turned on. When the key operating part 3a is switched to the "START" position, the engine is driven.

[0030] The key operation unit 3a is not particularly limited as long as it can switch the vehicle power on and off. For example, the key operation unit 3a can be operated by inserting a key to switch the power, or by pressing a button to switch the power.

[0031] The ignition power source 7a is a component that supplies power to electrical components that are supposed to be used in a state where the engine is driven, for example, and is switched on and off by the key operation unit 3a.

[0032] The accessory power supply 7b is, for example, a component that supplies power to an electrical component whose power supply amount is smaller than that of the electrical component connected to the ignition power supply 7a, and is switched on and off by the key operation unit 3a. The "ACC (accessory power)" position of the key operation unit 3a is arranged to be forward of the "ON (full vehicle power)" position relative to the "LOCK (lock)" position, and the accessory power supply 7b is turned on before the ignition power supply 7a by the operation of the key operation unit 3a.

[0033] The parking brake 3 b of the operation unit 3 is a so-called friction brake, and brakes the wheels in response to the operation of the driver.

[0034] The fuse 8 a is a component that protects the light source control device 6 when a current exceeding a predetermined value flows from the ignition power source 7 a , and is formed so that the wiring is melted when a current exceeding the predetermined value flows.

[0035] The fuse 8 b is a component that protects the light source control device 6 when a current exceeding a predetermined value flows from the accessory power supply 7 b , and is formed so that the wiring is melted when a current exceeding the predetermined value flows.

[0036] The relay switch 10 is arranged between the ignition power supply 7a and the daytime running lamp 5, and has a movable contact 10a, a fixed contact 10b, and a fixed contact 10c. The movable contact 10a is connected to the ignition power supply 7a via the fuse 8a, and is connected to the fixed contact 10b in a manner that can be switched to the fixed contact 10c. The fixed contact 10b is connected to the daytime running lamp 5. The fixed contact 10c is arranged in a non-conductive state. That is, when the movable contact 10a is connected to the fixed contact 10b, the relay switch 10 is in an on state in which the ignition power supply 7a is connected to the daytime running lamp 5. In addition, when the movable contact 10a is connected to the fixed contact 10c, the relay switch 10 is in an off state in which the ignition power supply 7a is not connected to the daytime running lamp 5.

[0037] The relay coil 12 is disposed between the accessory power supply 7b and the operation switch 13, and switches the relay switch 10 to the off state by energizing, that is, switches the movable contact 10a to the fixed contact 10c. In addition, the relay coil 12 is further connected to the ignition power supply 7a via the wiring 9b branched from the wiring 9a, through the protection diode 11a and the fuse 8a.

[0038] The accessory power supply 7b is connected to the wiring 9b extending from the branch point P1 of the wiring 9a to the relay coil 12 through the connection point P2. That is, the accessory power supply 7b is connected between the branch point P1 and the relay coil 12 on the wiring 9b.

[0039] The relay resistor 14 is used to consume the current that continues to flow through the relay coil 12 when the energization to the relay coil 12 is stopped.

[0040] The relay switch 10 , the relay coil 12 , and the relay resistor 14 constitute a relay circuit 15 .

[0041] The protection diode 11 a is disposed between the branch point P1 and the connection point P2 in the wiring 9 b , and suppresses current from flowing from the connection point P2 to the branch point P1 side.

[0042] The protection diode 11 b is disposed between the accessory power supply 7 b and the connection point P2 in the wiring 9 c , and suppresses current from flowing from the connection point P2 to the accessory power supply 7 b side.

[0043] The operation switch 13 is switched according to the operation of the parking brake 3b, one contact is connected to the relay coil 12, and the other contact is grounded. The operation switch 13 is set to be in an off state when the parking brake 3b is not actuated, and is switched from the off state to the on state when the parking brake 3b is actuated.

[0044] The light source control device 6 can also be provided with a new circuit for automatically turning off the daytime running lamp 5 in accordance with the lighting of the headlamp 4. For example, the light source control device 6 can control the lighting of the daytime running lamp 5 based on the operation information of the headlamp 4.

[0045] Next, the operation of this embodiment will be described.

[0046] First, if Figure 2 As shown in FIG. 1 , the parking brake 3b is actuated and the key operating unit 3a is operated to the "LOCK" position, and the vehicle is parked. The actuation of the parking brake 3b turns the operation switch 13 to the "ON" state, and the key operating unit 3a is in the "LOCK" position, and the ignition power supply 7a and the accessory power supply 7b are turned off. Therefore, the daytime running lamp 5 is not powered from the ignition power supply 7a via the relay switch 10, and the daytime running lamp 5 is turned off.

[0047] Next, the driver switches the key operation unit 3a from the "ACC" position to the "ON" position while the parking brake 3b is actuated, thereby turning on the ignition power supply 7a and the accessory power supply 7b.

[0048] Among them, Figure 3 As shown in FIG. 1 , in addition to the connection with the accessory power supply 7b, that is, when the relay circuit 15 is controlled by the power supply from the ignition power supply 7a alone, the ignition power supply 7a supplies power to the relay coil 12, and the ignition power supply 7a supplies power to the relay switch 10. By supplying power to the relay coil 12, the movable contact 10a of the relay switch 10 switches from the fixed contact 10b to the fixed contact 10c, and becomes an OFF state. However, since power is supplied to the daytime running lamp 5 from the ignition power supply 7a during the period before the movable contact 10a switches to the fixed contact 10c, the daytime running lamp 5 may light up instantly. In particular, when an LED lamp is used for the daytime running lamp 5, the lighting time may be long due to the fast lighting speed.

[0049] Therefore, if Figure 2As shown in FIG. 1 , the accessory power supply 7b is connected between the branch point P1 and the relay coil 12. The "ACC (accessory power)" position of the key operation unit 3a is arranged to be closer to the "LOCK (lock)" position than the "ON (full vehicle power)" position. Therefore, the accessory power supply 7b is turned on before the ignition power supply 7a by the operation of the key operation unit 3a.

[0050] Thus, the relay coil 12 is energized from the accessory power supply 7b before the ignition power supply 7a is turned on. Figure 4 As shown, before power is supplied from the ignition power source 7a to the daytime running lamp 5, the relay switch 10 switches the movable contact 10a to an off state in which it is connected to the fixed contact 10c.

[0051] That is, when the operation switch 13 is in the on state, the accessory power supply 7b that was previously in the on state before the ignition power supply 7a is energized to the relay coil 12, and the relay switch 10 is switched to the off state, thereby continuously stopping the power supply from the ignition power supply 7a to the daytime running lamp 5.

[0052] In this way, it is possible to prevent the ignition power supply 7a from being electrically connected to the daytime running lamp 5 after the key operation unit 3a is switched to the "ON" position, and it is possible to reliably control the lighting of the daytime running lamp 5. At this time, with a simple structure in which the accessory power supply 7b is connected between the branch point P1 and the relay coil 12, it is possible to reliably control the lighting of the daytime running lamp 5.

[0053] Then, if Figure 5 As shown in FIG. 1 , the driver switches the key operation unit 3a to the "START" position to drive the engine, releases the parking brake 3b, and starts the vehicle. By releasing the parking brake 3b, the operation switch 13 is turned off.

[0054] By turning the operation switch 13 off, the ignition power source 7a and the accessory power source 7b are deenergized to the relay coil 12, and the relay switch 10 is switched to the on state to connect the movable contact 10a and the fixed contact 10b. Thus, the daytime running lamp 5 is powered from the ignition power source 7a via the relay switch 10.

[0055] Thus, the daytime running lamp 5 can be automatically lit by a simple configuration in which the relay circuit 15 is arranged between the ignition power supply 7a and the daytime running lamp 5. Thus, the daytime running lamp 5 can be reliably lit, allowing the vehicle to run safely.

[0056] Furthermore, since the relay resistor 14 consumes the current flowing through the relay coil 12 when the power supply to the relay coil 12 is cut off, the relay switch 10 can be quickly switched to the on state.

[0057] Furthermore, since the protection diode 11 a is disposed between the branch point P1 and the connection point P2 , it is possible to suppress current from flowing from the accessory power supply 7 b to the branch point P1 side via the connection point P2 , and the daytime running lamp 5 can be stably lit.

[0058] Furthermore, since the protection diode 11 b is disposed between the accessory power supply 7 b and the connection point P2 , current can be suppressed from flowing from the ignition power supply 7 a to the accessory power supply 7 b via the connection point P2 , and energization from the accessory power supply 7 b to the relay coil 12 can be maintained.

[0059] In this way, the vehicle travels with the daytime running lamp 5 lit. Then, when the vehicle stops again and the parking brake 3b is actuated, the operation switch 13 is turned on. As a result, the ignition power supply 7a and the accessory power supply 7b are energized to the relay coil 12, and the relay switch 10 is switched to the off state. By switching the relay switch 10 to the off state, the power supply from the ignition power supply 7a to the daytime running lamp 5 is stopped, and the daytime running lamp 5 is turned off.

[0060] In this way, the daytime running lamp 5 can be automatically turned off when the vehicle stops, and unnecessary lighting can be suppressed.

[0061] According to the present embodiment, when the operation switch 13 is in the on state, the accessory power supply 7b is energized to the relay coil 12, and the relay switch 10 is switched to the off state, thereby stopping the power supply from the ignition power supply 7a to the daytime running lamp 5. Thus, after the ignition power supply 7a is turned on by operating the key operation unit 3a, the electrical connection between the ignition power supply 7a and the daytime running lamp 5 can be suppressed, and the lighting of the daytime running lamp 5 can be reliably controlled.

[0062] In the present embodiment, the relay coil 12 is connected to the ignition power supply 7a and the accessory power supply 7b, but the relay coil 12 may be disposed between the accessory power supply 7b and the operation switch 13 and is not limited thereto.

[0063] For example, Figure 6 As shown, in addition to the protection diodes 11a and 11b, new wirings 21a and 21b may be provided instead of the wirings 9a to 9c. Generally, when the key operation unit 3a is in the "START" position, the accessory power supply 7b is cut off, but by a structure in which the accessory power supply 7b is not cut off when the key operation unit 3a is in the "START" position, the following structure can be realized.

[0064] The wiring 21 a connects the ignition power source 7 a and the movable contact 10 a of the relay switch 10 via the fuse 8 a .

[0065] The wiring 21 b connects the accessory power supply 7 b and the relay coil 12 via the fuse 8 b .

[0066] That is, the wirings 21 a and 21 b are not branched. The ignition power supply 7 a is connected only to the relay switch 10 , and the accessory power supply 7 b is connected only to the relay coil 12 .

[0067] According to such a structure, when the key operation part 3a is switched from the "LOCK" position to the "ON" position via the "ACC" position, the relay coil 12 is energized from the accessory power supply 7b via the wiring 21b before the ignition power supply 7a is turned on. Thus, before the ignition power supply 7a supplies power to the daytime running lamp 5, the relay switch 10 can be switched to the OFF state, and the lighting of the daytime running lamp 5 can be reliably controlled. At this time, the lighting of the daytime running lamp 5 can be reliably controlled by a simple structure in which the ignition power supply 7a is connected only to the relay switch 10 and the accessory power supply 7b is connected only to the relay coil 12.

[0068] In addition, in the present embodiment, the relay circuit 15 is connected to the ignition power supply 7a, but it is not limited to the ignition power supply 7a as long as it is connected to the vehicle power supply.

[0069] In the present embodiment, the relay circuit 15 is connected to the accessory power supply 7 b , but the relay circuit 15 may be connected to a power supply that is turned on before being connected to the power supply of the relay switch 10 , and is not limited to the accessory power supply 7 b .

[0070] In the present embodiment, the operation switch 13 is switched according to the operation of the parking brake 3 b , but any type of operation switch 13 may be used as long as it can be switched according to the operation of the vehicle, and is not limited to the parking brake 3 b .

[0071] In the present embodiment, the relay circuit 15 is connected to the daytime running lamp 5 , but the relay circuit 15 may be connected to any light source of the vehicle and is not limited to the daytime running lamp 5 .

[0072] This application is based on the Japanese patent application (Japanese Patent Application No. 2020-025268) filed on February 18, 2020, the contents of which are incorporated herein by reference.

[0073] In addition, the above-mentioned embodiments are only examples of the embodiment when the present invention is implemented, and the technical scope of the present invention should not be interpreted restrictively by these embodiments. That is, the present invention can be implemented in various forms without departing from its main purpose or its main features. For example, the disclosure of the shape, number, etc. of each part described in the above-mentioned embodiments is only an example and can be implemented by appropriate changes.

[0074] Industrial Applicability

[0075] The light source control device provided by the present disclosure can be used as a device for switching the electrical connection between a vehicle power source and a light source.

[0076] Description of Reference Numerals

[0077] 1: Cab;

[0078] 2: Loading unit;

[0079] 3: Operation part;

[0080] 3a: key operation part;

[0081] 3b: parking brake;

[0082] 4: Headlight;

[0083] 5: Daytime running lights;

[0084] 6: Light source control device;

[0085] 7a: ignition power supply;

[0086] 7b: Accessory power supply;

[0087] 8a, 8b: fuse;

[0088] 9a~9c, 21a, 21b: wiring;

[0089] 10: Relay switch;

[0090] 10a: movable contact;

[0091] 10b, 10c: fixed contacts;

[0092] 11a, 11b: protection diode;

[0093] 12: Relay coil;

[0094] 13: Operation switch;

[0095] 14: Relay resistance;

[0096] 15: Relay circuit;

[0097] P1: branching point;

[0098] P2: Connection point.

Claims

1. A light source control device, comprising: A relay switch is arranged between the first power source and the light source of the vehicle; as well as a relay coil disposed between a second power source that is turned on before the first power source and an operation switch that is switched according to the operation of the vehicle, and switching the relay switch to an off state by energizing, When the operation switch is in the off state, the power supply to the relay coil is cut off, and the power is supplied from the first power supply to the light source via the relay switch in the on state. When the operation switch is in the on state, the second power supply supplies power to the relay coil, and the relay switch is switched to the off state, thereby stopping the supply of power from the first power supply to the light source. The first power source is an ignition power source that is switched on and off by key operation. The second power source is an accessory power source that is turned on before the ignition power source by key operation. The operating switch is switched from an off state to an on state by the actuation of the parking brake. The light source is a daytime running light.

2. The light source control device according to claim 1, wherein: The relay coil is further connected to the first power source by branching the wiring connecting the first power source and the relay switch. The second power supply is connected between a branch point of the wiring branch and the relay coil.

3. The light source control device according to claim 2, wherein: Also includes: A first protection diode is disposed between the branch point and a connection point connected to the second power supply, and suppresses current from flowing from the connection point to the branch point side; as well as The second protection diode is disposed between the second power supply and the connection point, and suppresses current from flowing from the connection point to the second power supply side.

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