Light source control device

Abstract

A light source control device is provided for reliably controlling the lighting of a light source. The device comprises: a first relay circuit (9) having a first relay switch (12) arranged between a vehicle power source and a light source, and a first relay coil (13) for switching the first relay switch (12) to an on state by energizing; and a second relay circuit (10) having a second relay switch (15) arranged between the power source and the first relay coil (13), and a second relay coil (16) arranged between the power source and an operating switch (11), for switching the second relay switch (15) to an off state by energizing, wherein when the operating switch (11) is in an on state, the second relay coil (16) is energized, and the second relay switch (15) is switched to an off state, so that the energization to the first relay coil (13) is cut off, and the first relay switch (12) is turned to an off state, thereby stopping the power supply from the 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, there is a light source control device for controlling a light source in actual use. A vehicle is equipped with different light sources such as headlights and daytime running lights, and these light sources need to be controlled according to their uses.

[0003] Therefore, as a technology for controlling the daytime running lights, for example, Patent Document 1 discloses a vehicle decorative component that determines whether it is daytime based on information such as a sunlight sensor, and controls the lighting of the daytime running lights 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] Problem that the invention aims to solve

[0008] However, since the vehicle decoration component in Patent Document 1 is not controlled according to the operation of the vehicle, the daytime running lamp may be turned on when the vehicle is parked, for example.

[0009] An object of the present disclosure is to provide a light source control device to reliably control the lighting of a light source.

[0010] Technical solutions to the problem

[0011] The light source control device disclosed in the present invention includes: a first relay circuit, having a first relay switch configured between a power source and a light source of a vehicle, and a first relay coil that switches the first relay switch to an on state by energizing; a second relay circuit, having a second relay switch configured between the power source and the first relay coil, and a second relay coil, wherein the second relay coil is configured between the power source and an operating switch, and the second relay switch is switched to an off state by energizing, and the operating switch is switched according to the operation of the vehicle, wherein, when the operating switch is in an off state, the energization to the second relay coil is cut off, and the first relay coil is energized via the second relay switch in an on state, and power is supplied from the power source to the light source via the first relay switch switched to an on state, and when the operating switch is in an on state, the second relay coil is energized, and the second relay switch is switched to an off state, so that the energization to the first relay coil is cut off, and the first relay switch becomes an off state, thereby stopping the power supply from the power source to the light source.

[0012] Effects of the Invention

[0013] According to the present disclosure, it is possible to reliably control the lighting of the light source. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A diagram showing a configuration of a vehicle including a light source control device according to an embodiment of the present disclosure;

[0015] Figure 2 A diagram showing the structure of a light source control device;

[0016] Figure 3 A diagram showing the structure of a light source control device that cannot control the instantaneous lighting of a daytime running light;

[0017] Figure 4 A diagram showing the connection state of the relay circuit when the key operating portion is switched to the "ON" position;

[0018] Figure 5 A diagram showing the connection state of the relay circuit when the parking brake is released. DETAILED DESCRIPTION

[0019] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

[0020] Figure 1 2 shows a configuration of a vehicle including a light source control device according to an embodiment of the present disclosure. The vehicle includes a cab 1, a loading portion 2, an operation portion 3, headlights 4, daytime running lights 5, and a light source control device 6. The vehicle may be a commercial vehicle such as a truck.

[0021] The cab 1 is used for passengers to sit in the vehicle and is arranged 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 provided at the driver's seat of the cab 1 for the driver to operate various parts of the vehicle. The operation unit 3 includes, for example, a steering unit, 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 turned on at night by, for example, an operation of the driver to improve the driver's visibility.

[0025] The daytime running lights 5 are so-called daytime running lights, which are turned on during the day to improve the recognition of the vehicle relative to the surrounding environment. The daytime running lights 5 are formed so as to be arranged on the lower side of the headlights 4 and to be turned on with a brightness lower than that of the headlights 4. The daytime running lights 5 can be composed of light emitting diodes (LEDs), 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 the daytime running lamp 5 to light up according to the operation of the operation unit 3 .

[0027] Next, the configuration 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 8 connected to the ignition power supply 7 of the vehicle, and the fuse 8 is connected to the daytime running lamp 5 via a relay circuit 9. In addition, the fuse 8 is also connected to the relay circuit 9 via a relay circuit 10. Moreover, the fuse 8 is also connected to an operating switch 11 connected to the parking brake 3b of the vehicle via the relay circuit 10.

[0029] Among them, the key operating part 3a of the operating part 3 is used to connect the vehicle power supply 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 vehicle's power supply device including the ignition power supply 7 is cut off, and the engine is stopped at the same time. When the key operating part 3a is switched to the "ACC" position, the accessory power supply not shown in the figure is connected. When the key operating part 3a is switched to the "ON" position, the ignition power supply 7 is turned on. When the key operating part 3a is switched to the "START" position, the engine is driven.

[0030] It should be noted that the key operating unit 3a is not particularly limited as long as it can switch the vehicle power on and off. For example, the key operating unit 3a can be an operating unit for switching the power by inserting a key, or an operating unit for switching the power by pressing a button, i.e., a so-called push-to-start mode.

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

[0032] 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 by the driver.

[0033] The fuse 8 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 , and is formed so that the wiring is melted when a current exceeding a predetermined value flows.

[0034] The relay circuit 9 includes a relay switch 12 , a relay coil 13 , and a relay resistor 14 .

[0035] The relay switch 12 is arranged between the ignition power supply 7 and the daytime running light 5, and has a movable contact 12a, a fixed contact 12b, and a fixed contact 12c. The movable contact 12a is connected to the ignition power supply 7 via the fuse 8, and is also connected to the fixed contact 12b in a manner that can be switched to the fixed contact 12c. The fixed contact 12b is set to a non-conductive state. The fixed contact 12c is connected to the daytime running light 5. That is, when the movable contact 12a is connected to the fixed contact 12b, the relay switch 12 is in a disconnected state in which the ignition power supply 7 is not connected to the daytime running light 5. In addition, when the movable contact 12a is connected to the fixed contact 12c, the relay switch 12 is in a connected state in which the ignition power supply 7 is connected to the daytime running light 5.

[0036] The relay coil 13 is connected in series with the ignition power supply 7 via the relay circuit 10 and the fuse 8. When energized, the relay switch 12 is switched to the on state, that is, the movable contact 12a is switched to be connected to the fixed contact 12c.

[0037] The relay resistor 14 is provided in parallel with the relay coil 13 to consume the current that continues to flow through the relay coil 13 when the energization to the relay coil 13 is stopped.

[0038] The relay circuit 10 includes a relay switch 15 , a relay coil 16 , and a relay resistor 17 .

[0039] The relay switch 15 is arranged between the ignition power supply 7 and the relay coil 13 of the relay circuit 9, and has a movable contact 15a, a fixed contact 15b, and a fixed contact 15c. The movable contact 15a is connected to the ignition power supply 7 via the fuse 8, and is also connected to the fixed contact 15b in a manner that can be switched to the fixed contact 15c. The fixed contact 15b is connected to the relay coil 13 of the relay circuit 9. The fixed contact 15c is set to a non-conductive state. That is, when the movable contact 15a is connected to the fixed contact 15b, the relay switch 15 is in a connected state in which the ignition power supply 7 is connected to the relay coil 13. In addition, when the movable contact 15a is connected to the fixed contact 15c, the relay switch 15 is in a disconnected state in which the ignition power supply 7 is not connected to the relay coil 13.

[0040] The relay coil 16 is arranged in series between the ignition power supply 7 and the operation switch 11, and switches the relay switch 15 to an off state by energizing, that is, switches the movable contact 15a to be connected to the fixed contact 15c.

[0041] The relay resistor 17 is provided in parallel with the relay coil 16 to consume the current that continues to flow through the relay coil 16 when the energization to the relay coil 16 is stopped.

[0042] It should be noted that the relay circuits 9 and 10 have the same specifications. For example, when the relay coils 13 and 16 are energized, the relay switch 12 and the relay switch 15 are switched at the same time, that is, they have the same switching speed.

[0043] The operating switch 11 is switched according to the operation of the parking brake 3b, one contact is connected to the relay coil 16 of the relay circuit 10, and the other contact is grounded. The operating switch 11 is set to be in an off state when the parking brake 3b is not working, and to switch from the off state to the on state when the parking brake 3b is working.

[0044] It should be noted that the light source control device 6 may be newly provided with a circuit to automatically turn off the daytime running lamp 5 when the headlight 4 is turned on. For example, the light source control device 6 may control the daytime running lamp 5 to turn on based on the operation information of the headlight 4.

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

[0046] First, if Figure 2 As shown, when the parking brake 3b is operated and the key operating part 3a is operated to the "LOCK" position, the vehicle is parked. The parking brake 3b is operated so that the operating switch 11 is turned on, and when the key operating part 3a is in the "LOCK" position, the ignition power supply 7 is turned off. Therefore, the ignition power supply 7 is not energized to the relay coils 13 and 16, and the movable contact 12a of the relay switch 12 is connected to the fixed contact 12b, and at the same time, the movable contact 15a of the relay switch 15 is connected to the fixed contact 15b.

[0047] At this time, since the ignition power source 7 is in the off state, the relay switch 12 is in the disconnected state in which the movable contact 12a and the fixed contact 12b are connected, and therefore the daytime running lamp 5 cannot be powered and is in the off state.

[0048] Next, the driver switches the key operation unit 3a to the "ON" position to turn on the ignition power source 7 while the parking brake 3b is in operation.

[0049] Among them, Figure 3As shown, when the daytime running lamp 5 is directly connected to the relay switch 15 of the relay circuit 10 other than the relay circuit 9, the relay coil 16 is energized from the ignition power supply 7, and the relay switch 15 is also energized from the ignition power supply 7. When the relay coil 16 is energized, the relay switch 15 is in an off state where the movable contact 15a is switched from the fixed contact 15b to the fixed contact 15c. However, since the ignition power supply 7 supplies power to the daytime running lamp 5 during the switching of the movable contact 15a to the fixed contact 15c, the daytime running lamp 5 may light up instantly. In particular, when the daytime running lamp 5 adopts an LED lamp, the lighting time may be long due to the fast lighting speed.

[0050] Therefore, if Figure 2 As shown, a relay circuit 9 is provided between the relay circuit 10 and the daytime running lamp 5. When the key operation part 3a is switched to the "ON" position, the ignition power supply 7 supplies power to the relay coil 16 of the relay circuit 10, and supplies power to the relay coil 13 and the relay switch 12 of the relay circuit 9.

[0051] At this time, since the relay switch 12 is in the disconnected state with the movable contact 12a and the fixed contact 12b connected, the ignition power supply 7 does not supply power to the daytime running lamp 5, and the daytime running lamp 5 is turned off. Moreover, while the ignition power supply 7 supplies power to the relay coil 13, causing the relay switch 12 to switch to the on state, the ignition power supply 7 supplies power to the relay coil 16, causing the relay switch 15 to switch to the off state. As a result, Figure 4 As shown, since the energization to the relay coil 13 is cut off, the relay switch 12 is kept in the OFF state.

[0052] That is, when the operation switch 11 is in the on state, the ignition power source 7 supplies power to the relay coil 16, and the relay switch 15 is switched to the off state, so that the power supply from the ignition power source 7 to the relay coil 13 is cut off. As a result, since the relay coil 13 is in the off state, the power supply from the ignition power source 7 to the daytime running lamp 5 is continuously stopped.

[0053] In this way, the electrical connection between the ignition power supply 7 and the daytime running lamp 5 can be suppressed immediately after the key operation part 3a is switched to the "ON" position, so as to reliably control the lighting of the daytime running lamp 5. At this time, by providing two relay circuits 9 and 10 between the ignition power supply 7 and the daytime running lamp 5, the lighting of the daytime running lamp 5 can be reliably controlled.

[0054] Next, if Figure 5 As shown, the driver switches the key operation unit 3a to the "START" position to drive the engine, and releases the parking brake 3b to start the vehicle. After releasing the parking brake 3b, the operation switch 11 becomes an OFF state.

[0055] When the operation switch 11 is turned off, the power supply from the ignition power supply 7 to the relay coil 16 is cut off, and the relay switch 15 is switched to the on state where the movable contact 15a is connected to the fixed contact 15b. As a result, the ignition power supply 7 supplies power to the relay coil 13 via the relay switch 15, and the relay switch 12 is switched to the on state where the movable contact 12a is connected to the fixed contact 12c. Then, the ignition power supply 7 supplies power to the daytime running lamp 5 via the relay switch 12 switched to the on state.

[0056] That is, when the operation switch 11 is in the off state, the power supply from the ignition power supply 7 to the relay coil 16 is cut off, and the relay coil 13 is energized through the on state of the relay switch 15. As a result, the daytime running lamp 5 is powered by the ignition power supply 7 through the on state of the relay switch 12, and the daytime running lamp 5 is lit.

[0057] Thus, the daytime running lamp 5 can be automatically lit by providing two relay circuits 9 and 10 between the ignition power supply 7 and the daytime running lamp 5. Therefore, the daytime running lamp 5 can be reliably lit, and the vehicle can be driven safely.

[0058] Furthermore, when the power supply to the relay coil 16 is cut off, the relay resistor 17 consumes the current flowing through the relay coil 16 , so that the relay switch 15 can be quickly switched to the on state.

[0059] In this way, the vehicle is driven with the daytime running lamp 5 on. When the vehicle stops again and the parking brake 3b is applied, the operation switch 11 is turned on. This causes the ignition power supply 7 to energize the relay coil 16, and the relay switch 15 is turned off, and the power supply to the relay coil 13 is cut off. In addition, the relay switch 12 is switched to the off state, so that the ignition power supply 7 stops supplying power to the daytime running lamp 5, and the daytime running lamp 5 is turned off.

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

[0061] According to the present embodiment, when the operation switch 11 is in the on state, the relay coil 16 is energized, and the relay switch 15 is switched to the off state, so that the power supply to the relay coil 13 is cut off, and the relay switch 12 is turned off, thereby stopping the power supply from the ignition power supply 7 to the daytime running lamp 5. As a result, the electrical connection between the ignition power supply 7 and the daytime running lamp 5 can be suppressed immediately after the ignition power supply 7 is turned on by operating the key operation part 3a, so that the lighting of the daytime running lamp 5 can be reliably controlled.

[0062] It should be noted that in this embodiment, the relay circuits 9 and 10 are configured so that when the relay coils 13 and 16 are energized, the relay switches 12 and 15 are switched at the same time, that is, the switching speeds are the same, but the relay circuits 9 and 10 are not limited to this.

[0063] For example, the relay circuit 9 may be configured such that the switching speed of the relay switch 12 is lower than that of the relay switch 15 of the relay circuit 10. Thus, when the key operating portion 3a is operated to turn on the ignition power supply 7, the relay switch 12 can be prevented from switching to the on state before the relay switch 15 is switched to the off state, and the lighting of the daytime running lamp 5 can be more reliably prevented.

[0064] In addition, in the present embodiment, the relay circuits 9 and 10 are connected to the ignition power source 7 , but are not limited to the ignition power source 7 , and may be connected to a power source of the vehicle.

[0065] In addition, in the present embodiment, the operation switch 11 is switched according to the operation of the parking brake 3 b , but the operation switch 11 is not limited to the parking brake 3 b , and any operation switch may be performed according to the operation of the vehicle.

[0066] In addition, in the present embodiment, the relay circuits 9 and 10 are connected to the daytime running lamp 5 , but are not limited to the daytime running lamp 5 , and may be connected to any light source of the vehicle.

[0067] This application is based on the Japanese patent application (Japanese Patent Application No. 2020-025261) filed on February 18, 2020, the entire contents of which are incorporated herein by reference.

[0068] In addition, the above embodiments are only specific examples for implementing the present invention, 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 shapes and quantities of the various parts described in the above embodiments are only examples and can be appropriately changed.

[0069] Industrial Applicability

[0070] The light source control device disclosed in the present invention can be used as a device for switching the electrical connection between a vehicle power source and a light source.

[0071] Description of Reference Numerals

[0072] 1 Cab

[0073] 2 Loading unit

[0074] 3. Operation part

[0075] 3a Key operation part

[0076] 3b Parking brake

[0077] 4 headlights

[0078] 5 Daytime running lights

[0079] 6 Light source control device

[0080] 7 Ignition power supply

[0081] 8 Fuse

[0082] 9, 10 Relay circuit

[0083] 11 Operation switch

[0084] 12, 15 relay switch

[0085] 12a, 15a movable contact

[0086] 12b, 12c, 15b, 15c fixed contacts

[0087] 13, 16 relay coil

[0088] 14, 17 relay resistor

Claims

1. A light source control device, comprising: A first relay circuit includes: a first relay switch disposed between a power source and a light source of the vehicle, and a first relay coil that switches the first relay switch to an on state by energizing; as well as The second relay circuit comprises: a second relay switch arranged between the power supply and the first relay coil, and a second relay coil, wherein the second relay coil is arranged between the power supply and an operation switch, and the second relay switch is switched to an off state by energizing, and the operation switch is switched according to the operation of the vehicle. When the operation switch is in an off state, the power supply to the second relay coil is cut off, and the first relay coil is powered via the second relay switch in an on state, and the light source is powered from the power supply via the first relay switch switched to an on state. When the operation switch is in the on state, the second relay coil is energized, and the second relay switch is switched to the off state, so that the energization to the first relay coil is cut off, and the first relay switch is turned to the off state, thereby stopping the power supply from the power supply to the light source. Wherein, the first relay circuit is configured such that a switching speed of the first relay switch is smaller than a switching speed of the second relay switch of the second relay circuit.

2. The light source control device according to claim 1, wherein: The power source is an ignition power source that is switched on and off by key operation. The parking brake is actuated so that the operating switch is switched from an off state to an on state.

3. The light source control device according to claim 1 or 2, wherein: The light source is a daytime running light.

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