JP4692107B2 - Lamp lighting device - Google Patents

Description

  The present invention relates to a lamp lighting device.

As the lighting device, for example, a lighting device for a room lamp disclosed in Patent Document 1 is known. The lighting device includes a case in which a lamp is mounted, a cover lens that covers the lamp, and a switch that switches ON / OFF of the lamp (switches supply / stop of power supply to the lamp). The case holds the lamp while electrically connecting the lamp and each terminal between a pair of terminals facing each other.
JP-A-10-194041

  In this type of lighting device, since the lamp is covered with a cover lens, it is necessary to replace the lamp after removing the cover lens. At this time, since the conductor part of each terminal is exposed to be electrically connected to both electrodes of the lamp, the terminals are short-circuited by a tool such as a screwdriver when the replacement work is performed with the switch turned on. This may cause overcurrent in the circuit.

  Particularly in recent years, there are lighting devices including not only the switch but also an electronic component (for example, a transistor) that controls energization of the lamp. Since such an electronic component is vulnerable to overcurrent and easily damaged, protection thereof is important. .

  Conventionally, a fuse is provided in a circuit, and when the overcurrent is generated, the fuse is blown to prevent a large current from continuing to flow. However, electronic components have a characteristic of being vulnerable to an overcurrent. In some cases, the electronic component may be broken earlier than the fuse is blown.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a lamp lighting device that can prevent damage to electronic components during lamp replacement.

In order to solve the above problems, the present invention provides a circuit connected to a power source, a lamp and an electronic component connected to each other via the circuit, and a control for executing energization control of the lamp by the electronic component. A lamp lighting device comprising: a main body having a terminal pair for holding the lamp in a detachable manner and connecting the lamp to the circuit in a state in which the lamp is mounted; and And a covering portion that covers the lamp while allowing illumination light of the lamp to pass through in the mounted state, and the main body portion includes the covering portion according to an operation of removing the covering portion from the main body portion. while opening the circuit, switch member for closing is provided the circuit the cover portion in accordance with an operation of attaching to the main body portion, said switch member, the connection-side busbar forming part of said circuit A connecting-side busbar piece that constitutes a part of the circuit and has an operation portion that is disposed away from the connected-side busbar piece along the attaching / detaching direction of the covering portion with respect to the main body portion, The part is provided with a pressing piece extending toward the main body along the attaching / detaching direction of the covering part, and the connection-side bus bar piece is pressed according to the operation of attaching the covering part to the main body part. The operation part comes into contact with the connected bus bar piece by being elastically deformed by being pressed by the piece, and the pressing piece is separated from the operation part in accordance with the operation of detaching the covering part from the main body part. the operating section provides a lighting device of the lamp, characterized that you function as a leaf spring for elastically returning to a position away from the connection side bus bar piece by.

  According to the present invention, when replacing the lamp, it is necessary to detach the covering portion covering the lamp from the main body portion, and the circuit is opened by the switch member in accordance with the detaching operation of the covering portion. Therefore, at this time, power supply to the electronic component is surely stopped.

  Therefore, in the present invention, even during the period when the energization control by the electronic component is being performed, the power supply to the electronic component can be stopped without fail when the lamp is replaced. Even in this case, the electronic component can be reliably prevented from being damaged without causing an overcurrent.

Moreover, according to this invention , the said circuit can be opened and closed by electrically connecting or disconnecting a to- be-connected side bus-bar piece and a connection-side bus-bar piece according to the attachment or detachment operation | movement of a coating | coated part.

Furthermore, according to the present invention , a circuit opening / closing function can be realized with a relatively simple configuration such as a pressing piece formed on the covering portion and each bus bar piece of the switch member.

  A mechanism for attaching / detaching the lamp to / from the main body is not particularly limited, but the main body is provided with a pair of connection terminals that constitute a part of the circuit, and is arranged between the connection terminals. It is preferable that both electrodes of the lamp and each connection terminal are electrically connected to each other by sandwiching the lamp.

  According to this configuration, since the circuit and the lamp can be electrically connected by sandwiching the lamp between the connection terminals, the attaching / detaching work of the lamp can be easily performed. On the other hand, in order to connect each of the connection terminals to both electrodes of the lamp, it is necessary to expose the conductor portions on the surfaces facing each other. Therefore, when connecting the lamp, these connection terminals are electrically connected to each other. Although there is a high possibility of being connected (for example, when the driver contacts both connection terminals), the circuit is opened by the switch member in accordance with the detachment operation of the covering portion, so that a short circuit does not occur. As a result, both the ease of attaching and detaching the lamp and the prevention of short circuit between the connection terminals can be achieved.

  The content of the energization control is not particularly limited, but the control unit controls the electronic component and adjusts the amount of power supplied by the power source when a predetermined extinction condition is satisfied. It is preferable to execute energization control that gradually darkens and turns off.

  According to this configuration, it is possible to perform so-called illumination control in which the lamp is gradually darkened and then turned off after a predetermined turn-off condition is satisfied. In the state where the lamp is hardly lit during the execution of the illumination control, the user mistakenly recognizes that the power supply is actually stopped even though the power supply to the lamp is being performed. Although it is assumed that the lamp is replaced, in the above configuration, the power supply to the lamp is forcibly stopped by the switch member in accordance with the detachment operation of the covering portion. However, it is possible to reliably prevent damage to the electronic components.

  The application target of the lighting device is not particularly limited. For example, the lamp is provided in a vehicle interior, and further includes a detection member that detects an open / closed state of the vehicle door, and the control unit includes: In addition, when the door is detected by the detection member, the electronic component is controlled to adjust the amount of power supplied by the power source so that the lamp is gradually darkened and turned off. .

  According to this configuration, since the lamp is lit for a while even when the door is closed, the occupant can get on and off the vehicle with more room than when the lamp is turned off when the door is closed.

  It is possible to prevent the electronic components from being damaged when the lamp is replaced.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a circuit configuration diagram showing a lighting device according to an embodiment of the present invention. 2A and 2B show a state in which the cover is closed in the room lamp shown in FIG. 1, FIG. 2A is an external perspective view, and FIG. 3A and 3B show a state in which the cover is opened in the room lamp shown in FIG. 1, FIG. 3A is an external perspective view, and FIG.

  With reference to FIGS. 1-3, the lighting device 1 which concerns on this embodiment illuminates the room lamp 2 provided in the vehicle interior, energizing-controlled by ECU3 according to the detection result of the door sensor 27. FIG. .

  Specifically, the lighting device 1 includes a room lamp 2, an ECU 3, a fuse 26, and a door sensor (detection member) 27 that are electrically connected to a battery (power source) 4. In the following description, first, a specific configuration of the room lamp 2 will be described.

  The room lamp 2 includes a main body 6 that detachably holds the lamp 5 and a cover (covering section) 7 that is detachable from the main body 6 and covers the lamp 5 while allowing illumination light from the lamp 5 to pass therethrough. And.

  The main body portion 6 is provided along a storage portion 8 having a bottomed container shape having a substantially rectangular shape in plan view, a bus bar piece 9 arranged on the bottom portion of the storage portion 8, and a short side of the storage portion 8. The slide switch 10 is provided. In the following description, the side where the slide switch 10 is provided in the longitudinal direction of the storage unit 8 will be described as the rear, and the width direction of the storage unit 8 will be described as the left-right direction.

The bus bar piece 9 includes a first piece (a connection-side bus bar piece) 9a extending in the front-rear direction, and an L-shaped second piece (a connected-side bus bar) extending in the left-right direction and bending backward from the front end portion of the first piece 9a. Piece) 9b and a third piece 9c disposed behind the second piece 9b and extending in the front-rear direction.

The front end portion (operation portion) of the first piece 9a is disposed so as to overlap the left end portion of the second piece 9b, but the second piece is bent in a stepped manner twice in the thickness direction. It is spaced apart from the left end of 9b. In the present embodiment, the first piece 9 a and the second piece 9 b constitute an example of the switch member 11 that is turned ON / OFF according to the attachment / detachment of the cover 7.

  That is, the cover 7 is formed in a bottomed container shape that is substantially rectangular corresponding to the planar shape of the storage portion 8, and the opening and the opening of the storage portion 8 are associated with each other in the storage portion 8. It is designed to be detachable. Specifically, the cover 7 includes a pair of engagement claws 7 a (one shown in FIG. 3) protruding left and right, and these engagement claws 7 a are attached to and detached from the engagement holes (not shown) of the storage portion 8. Engage freely.

  Further, the cover 7 is provided with a pressing piece 7 b that protrudes from the top surface (bottom) thereof toward the storage unit 8 at a position corresponding to the switch member 11. 2, the pressing piece 7b presses the first piece 9a by attaching the cover 7 to the storage portion 8, thereby bringing the first piece 9a and the second piece 9b into contact with each other (electricity). The length dimension is set so that it can be connected automatically). Therefore, as shown in FIG. 3, when the cover 7 is detached from the storage portion 8, the pressing piece 7b is separated from the first piece 9a in accordance with the removal of the cover 7 from the storage portion 8. The first piece 9a functions as a leaf spring and returns elastically, whereby the first piece 9a and the first piece 9b are separated (electrically cut).

  On the other hand, the second piece 9b and the third piece 9c have their front and rear adjacent ends (the rear end of the second piece 9b and the front end of the third piece 9c) bent at right angles in the thickness direction, and these bent ends are front and rear. The connection terminals 9d and 9e are opposed to each other in the direction. Then, by mounting the lamp 5 between the connection terminals 9d and 9e, the lamp 5 has the electrode 5a and the connection terminals 9d and 9e electrically connected to each other in the storage unit 8. Will be held.

  The slide switch 10 includes four contacts a, b, c, and d arranged in a left and right row, and a slider 12 that electrically connects two adjacent contacts among the contacts a to d.

  The contact a terminates by itself without being electrically connected to other members. The contact b is connected to the ECU 3 via the wiring 14. The contact c is connected to the third piece 9c. The contact d is grounded via the wiring 15.

  In this embodiment, the slider 12 is slidable between an OFF position where the contacts a and b are connected, a Door position where the contacts b and c are connected, and an ON position where the contacts c and d are connected. Yes.

  Next, a specific configuration of the ECU 3 will be described with an electrical connection mode.

  The ECU 3 includes a control unit 16 and a transistor 17 that performs energization control on the lamp 5 by the control unit 16.

  The control unit 16 is a calculation means including a well-known CPU or the like, and is connected to the positive electrode of the battery 4 through the wiring 18, while being grounded through the wirings 19, 20, and 21. It is driven by receiving power supply from the battery 4.

  Further, the control unit 16 is connected to the door sensor 27 via the wirings 22 and 23, and performs energization control described later by applying electric charges to the base 17a of the transistor 17 according to the detection result of the door sensor 27. It has become.

  That is, the door sensor 27 is configured by a switch provided between the grounded wiring 24 and the wiring 23, and when the switch is turned on and energization occurs between the wirings 23 and 24, the control unit It is detected that the vehicle door is opened.

  The transistor 17 has a collector 17 b connected to the wiring 14 via a wiring 25, and an emitter 17 c grounded via the wiring 20.

  Hereinafter, the electrical connection relationship between the room lamp 2, the ECU 3, and the battery 4 according to the switching operation of the slide switch 10 will be described.

  When the slider 12 is slid to the OFF position, the contact c connected to the lamp 5 is terminated by itself, so that the power of the battery 4 is not supplied to the lamp 5.

  On the other hand, when the slider 12 is slid to the Door position (see FIG. 6), the following circuit is formed in the lighting device 1, and the power of the battery 4 is supplied to the lamp 5 through this circuit. Become.

  That is, the circuit includes a wiring 29 that grounds the battery 4, a wiring 30 that connects the positive electrode of the battery 4 and one pole of the fuse 26, and a wiring 31 that connects the other pole of the fuse 26 and the wiring 18. The wiring 32 branched from the wiring 31 and connected to the first piece 9a of the bus bar piece 9, the bus bar piece 9, the slide switch 10, the wiring 14, the wiring 25, and the transistor 17 ( Channel), the wiring 20, and the wiring 21.

  When the slider 12 is slid to the ON position, the contact c and the contact d grounded via the wiring 15 are connected, so that the power of the battery 4 is supplied to the lamp 5.

  Then, the lighting device 1 lights the lamp 5 in a manner as shown in FIG. 4 according to the slide position of the slider 12.

  When the slider 12 is in the OFF position, the lamp 5 is always turned off.

  When the slider 12 is at the Door position, the control unit 16 executes control according to the detection result of the door sensor 27. That is, when at least one of the door sensors 27 is turned on (when at least one door is opened), the transistor 17 is energized and the lamp 5 is turned on.

  On the other hand, when all the door sensors 27 are turned off (when all the doors are closed: extinguishing condition), as shown in FIG. 5, the following control is executed by the control unit 16 from the time t0. That is, the energized state of the transistor 17 is maintained as it is from the time t0 to a predetermined time (until the time t1), and when it is determined that the predetermined time has elapsed by a timer (not shown) (time t1 has arrived). If it is determined that the power supply to the base 17a is gradually reduced, the power supply to the lamp 5 is reduced, and the lamp 5 is gradually darkened and turned off (time point t2). Control is executed.

  Referring to FIG. 4 again, when the slider 12 is in the ON position, the lamp 5 is always turned on.

  Hereinafter, replacement work of the lamp 5 in the room lamp 2 of the lighting device 1 will be described with reference to FIGS. 1, 2, 3, and 6. Here, the description will be made assuming that the slider 12 is at the Door position.

  In the state during use (the state before replacement), the cover 7 is attached to the storage portion 8 as shown in FIG. In this state, the first piece 9a and the second piece 9b are in contact with each other by the pressing piece 7b of the cover 7, that is, the switch member 11 is turned on as shown in FIG. Yes.

  In the replacement operation, first, as shown in FIG. 3, the cover 7 covering the lamp 5 is detached from the storage portion 8. Thereby, when the pressing piece 7b of the cover 7 is separated from the first piece 9a, the first piece 9a is elastically separated and returned from the second piece 9b, and as shown in FIG. The switch member 11 is turned off. As a result, the circuit is opened and the power supply to the lamp 5 is stopped.

  Next, the lamp 5 is removed from between the connection terminals 9d and 9e, and a replacement lamp 5 is mounted between the connection terminals 9d and 9e. At this time, since the conductor portions of the connection terminals 9d and 9e (the whole is a metal piece in the present embodiment) are exposed, a situation such as a driver contacting between the connection terminals 9d and 9e, etc. However, even when they come into contact with each other, the circuit is opened when the cover 7 is detached as described above, so that the circuit is not energized.

  After the replacement lamp 5 is attached, the cover 7 is attached to the storage unit 8 again. As a result, as shown in FIG. 6A, the switch member 11 is turned on and the circuit is closed.

  In the above description, the case where the slider 12 is in the Door position has been described. However, even when the slider 12 is in the ON position, the switch member 11 functions suitably when the lamp 5 is replaced.

  That is, referring to FIG. 1, when the slider 12 is in the ON position and the connection terminals 9d and 9e are short-circuited, if the switch member 11 is not present, the fuse 26 is blown and the energization is performed. However, when the switch member 11 is provided as in the lighting device 1, the power supply to the lamp 5 is stopped when the cover 7 is detached, so that energization is prevented without blowing the fuse 26. can do.

  As described above, according to the lighting device 1, when replacing the lamp 5, it is necessary to remove the cover 7 covering the lamp 5 from the main body 6. Since the circuit is opened by the switch member 11 according to the operation, the power supply to the transistor 17 is surely stopped at this time.

  Therefore, in the lighting device 1, even when the energization control (illumination control) by the transistor 17 is being executed (period t 0 to t 2 in FIG. 5), the power to the transistor 17 is always supplied when the lamp 5 is replaced. Since the supply can be stopped, even if the circuit is short-circuited when the lamp 5 is replaced, the transistor 17 can be reliably prevented from being damaged without causing an overcurrent.

  In the lighting device 1 configured to execute the illumination control, in the state where the lamp 5 is hardly lit during the execution period of the illumination control (t0 to t2 in FIG. 5), the power supply to the lamp 5 is actually performed. Although it is also assumed that the user mistakenly thinks that the power supply has been stopped despite being carried out and the lamp 5 is replaced, according to the lighting device 1, the cover is covered by the switch member 11. Since the power supply to the lamp 5 is forcibly stopped in accordance with the detaching operation 7, the transistor 17 can be reliably prevented from being damaged even during the illumination control execution period.

  In the lighting device 1, the circuit is opened and closed by bringing the first piece 9 a and the second piece 9 b into contact with each other by the pressing piece 7 b of the cover 7. The opening / closing function can be realized.

  In the above-described embodiment, the circuit is opened and closed by moving the first piece 9a and the second piece 9b up and down, but the circuit opening and closing mechanism is not particularly limited. . For example, the first piece 9a and the second piece 9b are disposed in a state where they are separated from each other in the front-rear or left-right direction, the pressing piece 7b is formed of a conductive material, and the cover 7 is attached to the main body 6. In accordance with the above, by placing the conductive pressing piece 7b between the two pieces 9a and 9b, or by arranging the pressing piece 7b so as to straddle both the pieces 9a and 9b, the both pieces 9a and 9b are electrically connected. It can also be set as the structure which connects.

  And like the said lighting device 1, the lamp | ramp 5 can be clamped between the connection terminals 9d and 9e which oppose each other, and the attachment or detachment work of the said lamp | ramp 5 can be performed easily. On the other hand, since each of the connection terminals 9d and 9e needs to expose a conductor portion on the opposite surface in order to connect to both electrodes 5a of the lamp 5, when connecting the lamp 5, Although there is a high possibility that 9d and 9e are electrically connected to each other, a short circuit does not occur because the circuit is opened by the switch member 11 in accordance with the removal operation of the cover 7, and as a result, the lamp 5 It is possible to achieve both ease of attaching / detaching work and prevention of short circuit between the connection terminals 9d and 9e.

  Further, by providing the lighting device 1 in the vehicle as in the above embodiment, the lamp 5 can be lit for a while even if the door is closed. It is possible to get in and out of the vehicle more comfortably than when the lights are turned off.

  Note that the lighting device 1 is not limited to being mounted on a vehicle, and may be employed in a lighting stand, for example.

  In the above embodiment, the transistor 17 is arranged for illumination control. However, the role of the transistor 17 is not limited. For example, the transistor 17 serves as a switch for performing power supply to the lamp 5 or supply stop. It may fulfill a function.

  Furthermore, in the above-described embodiment, a transistor is exemplified as an example of an electronic component, but the electronic component is not particularly limited as long as it can execute energization control.

It is a circuit block diagram which shows the lighting device which concerns on embodiment of this invention. The room lamp shown in FIG. 1 shows a state in which a cover is closed, (a) is an external perspective view, and (b) is a cross-sectional view of the main part. The room lamp shown in FIG. 1 shows a state in which a cover is opened, (a) is an external perspective view, and (b) is a cross-sectional view of the main part. It is a table | surface which shows the control content by the control part shown in FIG. It is a graph which shows the aspect of the illumination control shown in FIG. It is a circuit diagram which shows the state of the room lamp at the time of lamp replacement | exchange, (a) has shown the state with which the switch member was closed, (b) has shown the state with which the switch member was open | released, respectively.

DESCRIPTION OF SYMBOLS 1 Lighting device 4 Battery 5 Lamp 5a Both electrodes 6 Main part 7 Cover (covering part)
7b Press piece 9 Bus bar piece 9d Connection terminal 9e Connection terminal 10 Slide switch 11 Switch member 16 Control part 17 Transistor 26 Fuse 27 Door sensor 28 Circuit

Claims (4)

A lamp lighting device comprising: a circuit connected to a power source; a lamp and an electronic component connected to each other via the circuit; and a control unit that controls energization of the lamp by the electronic component,
A main body having a pair of terminals for holding the lamp in a detachable manner and connecting the lamp to the circuit in a state in which the lamp is mounted;
The main body is detachable, and includes a covering portion that covers the lamp while transmitting illumination light of the lamp in the mounted state.
The main body is provided with a switch member that opens the circuit in response to an operation of detaching the cover from the main body, and closes the circuit in accordance with an operation of mounting the cover on the main body. ,
The switch member is connected to the connected bus bar piece that constitutes a part of the circuit, and is separated from the connected bus bar piece along the attachment / detachment direction of the covering portion with respect to the main body while constituting a part of the circuit. A pressing piece extending toward the main body along the attaching / detaching direction of the covering portion is provided on the covering portion.
The connection-side bus bar piece is elastically deformed by being pressed by the pressing piece according to an operation of mounting the covering portion on the main body portion, and the operation portion comes into contact with the connected-side bus bar piece, and that you function as a leaf spring, wherein the operation portion is elastically restored to a position away from the connection side bus bar piece by the pressing piece in accordance with the operation of desorbing the coating portion from the body portion is separated from the operating unit Characteristic lamp lighting device. A pair of connection terminals constituting a part of the circuit are provided opposite to each other in the main body, and the lamp is sandwiched between the connection terminals so that both electrodes of the lamp and the connection terminals The lamp lighting device according to claim 1, wherein the lamps are electrically connected to each other. 2. The control unit according to claim 1, wherein when a predetermined turn-off condition is satisfied, the lamp is turned off by gradually darkening the lamp by controlling the electronic component and adjusting a power supply amount by the power source. Or the lighting device of the lamp | ramp of 2. The lamp is provided in the interior of the vehicle, and further includes a detection member that detects an open / closed state of the door of the vehicle, and the control unit is configured to detect the electronic device when the detection member detects that the door is closed. The lamp lighting device according to any one of claims 1 to 3, wherein the lamp is gradually darkened and extinguished by adjusting a power supply amount by the power source by controlling components.

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