JP4451862B2 - LED light source unit - Google Patents

Description

  The present invention relates to an LED light source unit that can be mounted on a luminaire in which a boat-type light bulb such as a room lamp of an automobile is used.

  Conventionally, a room lamp for an automobile is provided with a boat-type light bulb 1 as shown in FIG. 5, that is, a relatively short tube-shaped translucent airtight container 2 and the translucent airtight container 2. There is used a double-cap light bulb composed of a filament 3 and a pair of caps 4 attached to both ends of the translucent airtight container 2 in the axial direction and electrically connected to the filament 3.

  Here, as shown in FIG. 6, an automobile room lamp R in which the boat-shaped light bulb 1 is used includes a housing H that is attached to the ceiling of the automobile and a cover C that covers the entire opening of the housing H. A socket portion S having a pair of power supply terminals T that elastically hold the boat-shaped light bulb 1 is formed inside the housing H.

  The boat lamp 1 is attached to the room lamp R as shown in FIG. 6 (A), in which the pair of power supply terminals T clamps both ends of the boat lamp 1 in the axial direction (shaft clamping type). There are (R1) and (R2) type (R2) in which each feeding terminal T clamps the body of each of the caps 4 from the width direction as shown in FIG. 6B.

  By the way, this conventional boat-shaped light bulb 1 has a problem that the luminous body is a filament, so that its life is short and power consumption is large.

  In order to solve this problem, as shown in FIG. 7, a boat light bulb type LED light source unit 6 using an LED (light emitting diode) 5 as a light emitter has been proposed (see, for example, Patent Documents 1 and 2). .)

Such a boat-shaped light bulb type LED light source unit 6 is configured in the same shape and size as a conventional boat-shaped light bulb, and is directly attached to a lighting device using the boat-shaped light bulb 1 such as an automobile room lamp R as an alternative to a boat-shaped light bulb. can do. Moreover, since LED5 is used as a light-emitting body, the lifetime of a light source can be extended greatly and power consumption can be reduced significantly.
JP-A-9-92233 JP 2004-241191 A

  However, the LED 5 has higher directivity of light to be emitted than the filament 3, and the light is difficult to diffuse. When the above-described LED light source unit 6 is mounted on the room lamp R, as shown in FIG. 8, the distance from the light emitting surface of the light source to the cover C is substantially the same as that of the boat-type light bulb 1 using the conventional filament 3 or Shorter. Therefore, in the room lamp R using the LED light source unit 6 described above, the light emitting surface of the light source inside the lamp R can be clearly seen from the outside of the cover C when it is lit. When 6 has a plurality of LEDs 5, light and darkness of light emitted from the cover C appears clearly. Further, although the LED 5 can emit light with high luminance, the directivity of the emitted light is high as described above, and light does not diffuse as in the case where the filament 3 is used. The entire surface cannot emit light, and the entire interior of the vehicle cannot be illuminated.

  On the other hand, as another example of the LED light source unit used for the room lamp, a plurality of LEDs are mounted on the surface of a substrate formed to cover almost the entire opening of the housing H in the room lamp R. It is known to have a boat-shaped light bulb-shaped power receiving terminal connected by wiring.

  According to such an LED light source unit, it can be mounted as it is on a luminaire using the conventional boat-type light bulb 1, and the cover C mounted on the front surface of the room lamp R when the LEDs mounted on the board are separated from each other. The light can be emitted from the entire surface.

  However, since the board is formed in a size that covers almost the entire opening of the housing H, and the socket-shaped light receiving terminal is attached to the socket portion S, the board on which the LED is mounted is attached to the housing H. The distance from the light emitting surface of the LED, which is a light source, to the cover C is shortened (like the LED light source unit 6 described above), and the light emitting surface of the light source inside the lamp R from the outside of the cover C cannot be mounted deeply. Is clearly visible, and there is a problem that the brightness of the light emitted from the cover C appears clearly.

  Thus, the room lamp R using the conventional LED light source unit 6 has a problem that it is difficult to obtain good room illumination.

  Therefore, the main problem of the present invention is to ensure a sufficient distance from the light emitting surface of the light source to the cover in the LED light source unit that can be directly mounted on a lighting device such as an automotive room lamp using a boat-shaped light bulb. It is to provide an LED light source unit that can be adapted to a plurality of power supply terminals of different types.

  The invention described in claim 1 is an LED light source unit 10 used in a lighting fixture in which a power supply terminal T for elastically holding a cap 4 of a boat-shaped light bulb 1 is provided inside a housing H. A substrate 12 having a plate-like main body 12a of a size that can be accommodated, and a pair of opposite end portions of the main body 12a having a concave notch 20 formed at a position corresponding to the power supply terminal T, and one end notched A bar-shaped bottom power receiving terminal 14 provided at both notches 20 so that the other end protrudes from the notch 20 and one end is fixed to the side 20b of the notch 20; Electrically connected to the protruding side power receiving terminals 16, the bottom power receiving terminals 14, and the side power receiving terminals 16 provided in the notches 20 so that the other ends protrude into the notches 20. Along with the surface of the substrate body 12a Comprising implemented one or more of the LED18 "It is an LED light source unit 10, wherein the.

  In the LED light source unit 10 of the present invention, the light source unit 10 is formed in a size that fits inside the housing H of the lighting fixture that uses the boat-shaped light bulb 1 and has a concave shape at a position corresponding to the power supply terminals T at a pair of ends facing each other. A pair of substantially rod-shaped bottom-side power receiving terminals 14 and a substantially protruding side-side power receiving terminal 16 are fixed to a plate-like substrate 12 provided with a notch 20, and an LED 18 serving as a light source on the surface of the main body 12 a of the substrate 12. Therefore, the thickness is extremely thinner than that of the conventional boat-type light bulb 1. The plate-like substrate 12 is provided with a concave notch 20 at a position corresponding to the power supply terminals T at a pair of end portions facing each other. When mounting on a lighting fixture such as a lamp R, the unit 10 can be mounted deep inside the housing H without the power supply terminal T interfering with the light emitting surface of the LED 18 as a light source to the cover C. The distance can be maximized. Therefore, when lighting equipment such as the room lamp R is turned on, it is possible to make it difficult to visually recognize the position of the light emitting surface of the LED 18 inside the lamp R from the outside of the cover C, and the light and darkness of the light emitted from the cover C is conspicuous. Can be eliminated.

  Further, since the main body 12a of the substrate 12 is plate-shaped, particularly when a plurality of LEDs 18 are mounted on the surface thereof, the LEDs 18 can be mounted such that they are spaced from each other. For this reason, even if the LED 18 that does not diffuse light as much as the filament is used as the light source, the area irradiated with the light by the LED 18 can be expanded, and when used for a room lamp R for an automobile, the room lamp R The entire interior of the car can be illuminated with the light that emits light.

  Furthermore, the LED light source unit 10 of the present invention is provided with a notch 20 at a position corresponding to the power supply terminal T at a pair of opposite ends of the main body 12a, and the base power receiving terminal 14 and the side are provided at both of the notches 20. Since the side power receiving terminal 16 is provided, any lighting apparatus that uses the boat-shaped light bulb 1 can be adapted to a plurality of power supply terminals T of different types, and the LED light source unit 10 can be mounted instead of the boat-shaped light bulb 1. it can. That is, as a mounting manner of the boat-shaped light bulb 1 in a lighting fixture using the boat-shaped light bulb 1, as described in the example of the vehicle room lamp R described above, a pair of power supply terminals T are connected to both ends in the axial direction of the boat-shaped light bulb 1. There are a type (R1) for clamping and a type (R2) for each feeding terminal T to clamp the body portions of both caps 4 from the width direction. In the former type, the bottom power receiving terminal 14 is used. The LED light source unit 10 is sandwiched between the power supply terminals T so that the tips of the power supply terminals T come into contact with the power supply terminals T. On the other hand, in the latter type, the power supply terminal T can be clamped from the outside by the notch portion 20 of the substrate 12 so that the side power receiving terminal 16 contacts the power supply terminal T.

  According to the present invention, it can be directly mounted on a lighting fixture such as an automotive room lamp using a boat-shaped light bulb, and a sufficient distance from the light emitting surface of the light source to the cover can be secured, and a plurality of power supplies of different types can be provided. An LED light source unit that can be adapted to a terminal can be provided.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing an LED light source unit 10 according to an embodiment of the present invention. As shown in this figure, the LED light source unit 10 of this embodiment is mainly composed of a substrate 12, a bottom power receiving terminal 14, a side power receiving terminal 16, and an LED 18.

  The substrate 12 is a member that serves as a base of the LED light source unit 10 and is large enough to fit in a socket portion S provided in a housing H of a lighting fixture that uses the boat-shaped light bulb 1 (in the present embodiment, a room lamp R for an automobile). And a plate-like main body 12a.

  The main body 12a is a plate-like member on which an electronic component is mounted and a conductive circuit that electrically connects the electronic component is formed, and is generally used as a so-called surface mounting substrate. A paper epoxy substrate, a glass epoxy substrate, or the like is formed into a size that can be accommodated in the socket portion S of the room lamp R as described above.

  A concave notch 20 is formed in both of a pair of opposite ends of the main body 12a [specifically, a position corresponding to the power supply terminal T when the main body 12a is attached to the socket S]. (Therefore, in the case of the present embodiment, the outer shape of the substrate 12 provided with the notch 20 is substantially H-shaped.) The bottom power receiving terminal 14 is firmly fixed to the central portion of the bottom 20a of the notch 20, and the side power receiving terminal 16 is firmly fixed to both of the opposite sides 20b of the notch 20. It is fixed.

  The width of the notch 20 is set so that the side power receiving terminal 16 can sandwich the width-clamping type power supply terminal T from the outside, and the depth (depth) of the notch 20 is the bottom power receiving terminal. 14 is set to be clamped by a shaft clamping type power supply terminal T.

  The bottom power receiving terminal 14 is a substantially rod-shaped member made of a conductive metal material such as brass, aluminum, and stainless steel, and the tip of the power receiving terminal T sandwiches both ends in the axial direction of the boat-shaped light bulb 1 (see FIG. 6A). For obtaining electric power from the power supply terminal T. It should be noted that the rear end of the bottom power receiving terminal 14 (that is, one end fixed to the main body 12a) is fitted into a mounting hole (not shown) drilled at the bottom power receiving terminal 14 mounting position of the bottom 20a. An attachment portion (not shown) for firmly fixing the main body 12a and the bottom power receiving terminal 14 is provided.

  On the other hand, the side power receiving terminal 16 is a substantially projecting member made of a conductive metal material such as brass or aluminum, like the bottom power receiving terminal 14 described above. This is for obtaining electric power from the power supply terminal T by contacting the power supply terminal T (see FIG. 6B) of the type that sandwiches the body portion from the width direction. It should be noted that the rear end of the side terminal 16 (that is, one end fixed to the main body 12a) is drilled at the side power receiving terminal 16 mounting position of the side 20b in the same manner as the bottom power receiving terminal 14 described above. An attachment portion (not shown) is provided for fitting in the attachment hole (not shown) and firmly fixing the main body 12a and the bottom power receiving terminal 16.

  The LED 18 is a light emitter that serves as a light source of the LED light source unit 10. In the LED light source unit 10 of the present invention, any of a so-called bullet-type LED and a surface-mounted LED can be used as the LED 18, but the light emitted from the cover C on the surface of the room lamp becomes more uniform. Thus, it is preferable to use a surface-mount type LED having low light directivity (that is, a wide light emission angle).

  Moreover, about the color tone of the light which LED18 emits, not only white thing but arbitrary things, such as blue and red, can be selected and used.

  Furthermore, the number of LEDs 18 to be mounted on the substrate 12 can be selected as appropriate (in a range of one or more) according to the required brightness. In the present embodiment, a case where a total of five LEDs 18 are mounted at the center and four corners of the substrate 12 is shown. However, by providing a plurality of LEDs 18 so as to be separated from each other, light is emitted by the LEDs 18. The area irradiated with can be expanded.

  The LED 18 is electrically connected to the above-described bottom power receiving terminal 14 and the side power receiving terminal 16 on the surface of the substrate body 12a. At this time, the LED 18 is connected between the power receiving terminals 14 and 16. An electronic component such as a resistor 22 is interposed as necessary.

  Next, when manufacturing the LED light source unit 10 according to the present embodiment, first, an outer shape of a size that fits in the socket portion S of the room lamp R such as a paper epoxy substrate or a glass epoxy substrate (this embodiment). In the case of the example, a plate-like substrate body 12a is obtained by cutting into a quadrangular shape, and the center portion of a pair of opposite end portions of the substrate body 12a is cut into a concave shape to form a cutout portion 20. And a substantially H-shaped board | substrate 12 is completed by forming a conductive circuit in the surface and / or back surface of the board | substrate body 12a.

  Here, as a method of forming a conductive circuit on the front surface or the back surface of the substrate body 12a, a method in which metal deposition is performed after the substrate body 12a is formed and later electrolytic plating is performed, or a circuit made of metal foil through an adhesive is used. Examples thereof include a transfer method and a circuit drawing method using a conductive paste.

  Subsequently, the bottom power receiving terminal 14 is fixed to the bottom side 20a of each notch 20 of the completed substrate 12, the side power receiving terminal 16 is fixed to the opposite side 20b of each notch 20, and the bottom power receiving terminal 14 is fixed. And the side power receiving terminal 16 are electrically connected to the conductive circuit.

  Then, a required number of LEDs 18 at a predetermined position on the surface of the substrate body 12a (in the case of the embodiment shown in FIG. 1, a total of five in the center of the substrate and four corners) LEDs 18 and, if necessary, resistors 22 are disposed, These are fixed on the conductive circuit with solder or the like. Thereby, each receiving terminal 14 and 16 and LED18 are electrically connected, and the LED light source unit 10 is completed.

  When the LED light source unit 10 manufactured in the above-described process is mounted on the vehicle room lamp R and used, the cover C of the vehicle room lamp R is removed, and the LED light source is replaced with the boat-shaped light bulb 1. The unit 10 is mounted deep inside the socket part S.

  Here, as described in “Background Art”, as a manner of mounting the boat-type light bulb 1 to the room lamp R, a pair of power feeding terminals T sandwiches both ends in the axial direction of the boat-type light bulb 1 (shaft-clamping type). There is a type (R1) and a type (R2 type) in which each power supply terminal T clamps the body portions of both caps 4 from the width direction. Therefore, when the LED light source unit 10 of this embodiment is mounted on the former type of room lamp R1, the tip of the bottom power receiving terminal 14 is in contact with each power supply terminal T as shown in FIG. Then, the LED light source unit 10 is held between the power supply terminals T. On the other hand, when the LED light source unit 10 of this embodiment is attached to the latter type of room lamp R2, the side power receiving terminal 16 is in contact with the power feeding terminal T as shown in FIG. The power supply terminal T is sandwiched from outside by the notch 20 of the substrate 12.

  According to the LED light source unit 10 of the present embodiment, the substantially rod-shaped bottom power receiving terminal 14 and the substantially protruding side power receiving terminal 16 are fixed to the plate-shaped main body 12a, and the light source is provided on the surface of the main body 12a of the substrate 12. Therefore, the thickness of the LED 18 is extremely thin compared to the thickness of the conventional boat-type light bulb 1. The plate-like substrate 12 is provided with a concave notch 20 at a position corresponding to the power supply terminals T at a pair of end portions facing each other. When mounted on the lamp R, it can be mounted deep inside the socket portion S. That is, as shown in FIG. 3B, the distance d2 from the light emitting surface of the LED 18 to the cover C as compared to the distance d1 from the light emitting surface to the cover C in the conventional LED bulb 6 (see FIG. 3A). Can be largely taken (d1 <d2). In other words, the distance from the light emitting surface of the LED 18 to the cover C can be maximized. Therefore, when the room lamp R is turned on, it is difficult to visually recognize the position of the light emitting surface of the LED 18 inside the lamp R from the outside of the cover C, and the brightness and darkness of the light emitted from the cover C can be made inconspicuous. it can.

  Further, since the main body 12a of the substrate 12 is plate-shaped, particularly when a plurality of LEDs 18 are mounted on the surface thereof, the LEDs 18 can be mounted such that they are spaced from each other. For this reason, even if the LED 18 that does not diffuse light as much as the filament is used as the light source, the area irradiated by the light emitted from the LED 18 can be expanded, and the entire interior of the vehicle can be illuminated with the light emitted from the room lamp R.

  Furthermore, the LED light source unit 10 of the present invention is provided with a notch 20 at a pair of opposite ends of the main body 12a, and a base power receiving terminal 14 and a side power receiving terminal 16 are provided at both of the notches 20. Therefore, the room lamp R that uses the boat-shaped light bulb 1 can be adapted to a plurality of power supply terminals T of different types, and the LED light source unit 10 can be mounted in place of the boat-shaped light bulb 1.

  Therefore, it is possible to provide the LED light source unit 10 that can be mounted on the automotive room lamp R using the conventional boat-type light bulb 1 as it is and can obtain good room illumination.

  In the above-described embodiment, the substrate 12 has a substantially H-shaped outer shape. However, the outer shape of the substrate 12 is within the socket portion S of the room lamp R and faces each other. Any shape may be employed as long as the pair of ends are provided with a notch 20 capable of sandwiching the power supply terminal T. For example, the main body 12a is formed into an elliptical shape, and the main bodies 12a are opposed to each other. A notch ellipse shape (not shown) in which a concave notch 20 is formed at the end of the longer diameter side (or the shorter diameter side) may be used. In addition, as the size of the main body 12a constituting the substrate 12, a size that fits in the socket portion S provided in the housing H of the room lamp R is shown, but the size of the main body 12a is the LED light source unit. Any size can be used as long as 10 can be mounted and stored deep inside the housing H, and the size is not limited to the above-described size.

  Moreover, although the case where the bottom power receiving terminal 14 and the side power receiving terminal 16 are configured separately is shown, these terminals 14 and 16 may be configured integrally using, for example, press molding. .

  Moreover, although the case where the side power receiving terminal 16 is attached to the both sides 20b of the notch 20 facing each other has been shown, if the power can be reliably received from the power feeding terminal T, the side power receiving terminal 16 is notched. You may make it provide only in any one of the side 20b.

  Moreover, although the case where LED18 and the resistor 22 were mounted on the surface of the main body 12a of the board | substrate 12 was shown, in order to improve the appearance of the LED light source unit 10 surface, the resistor 22 was mounted on the back surface side of the main body 12a, Only the LED 18 may be mounted on the side.

  Furthermore, as shown in FIG. 4, a portion other than the LED 18 mounted on the surface of the main body 12a of the substrate 12 may be molded with a resin 24 such as an epoxy resin. By doing so, the appearance of the LED light source unit 10 can be improved, and the main body 12a, the resistor 22 and the conductive circuit can be protected from temperature, humidity, dust and the like.

  And in the above-mentioned example, although the case where the LED light source unit 10 of this invention was used for the room lamp R for motor vehicles was shown, the use of the LED light source unit 10 of this invention is not limited to this, Conventionally As long as it is a lighting fixture in which the boat-shaped light bulb 1 is used, it may be used for any purpose.

It is a perspective view which shows the LED light source unit of one Example of this invention. (A) And (B) is explanatory drawing which shows the usage condition of the LED light source unit of this invention. (A) is a figure which shows a mode that the conventional LED light bulb was mounted | worn with the power feeding terminal of the room lamp. (B) is a figure which shows a mode that it mounted | wore with the electric power feeding terminal of the room lamp which concerns on this invention. It is a perspective view which shows the LED light source unit of the other Example of this invention. It is the schematic which shows the conventional boat-shaped light bulb. (A) And (B) is explanatory drawing which shows the usage condition of the room lamp using the conventional boat-shaped light bulb. (A) is a type in which the power supply terminal T of the boat-shaped light bulb clamps both ends in the axial direction, and (B) is a diagram showing a structure of a type in which the power supply terminal T of the boat-shaped light bulb clamps the body portions of both caps from the width direction. It is. It is the schematic which shows the conventional LED light source unit (boat shaped light bulb type). (A) And (B) is a principal part expanded partial sectional view which shows the usage condition of each conventional light source. (A) shows a state where a boat-shaped light bulb is mounted on a room lamp, and (B) shows a state where an LED light source unit having the same shape and size as the boat-shaped light bulb is mounted on the room lamp.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... LED light source unit 12 ... Board | substrate 12a ... (Substrate) main body 14 ... Bottom power receiving terminal 16 ... Side power receiving terminal 18 ... LED
20 ... Notch 20a ... Base 20b (of the notch) Side 22 (of the notch) Resistor 24 ... Resin R ... Room lamp S (for automobile) Socket T ... Feed terminal C ... Cover

Claims (1)

An LED light source unit used in a lighting fixture provided with a power supply terminal that elastically holds a cap of a boat-shaped light bulb inside a housing,
A board having a plate-like main body of a size that fits inside the housing, and a pair of opposite end portions of the main body having a concave notch formed at a position corresponding to the power supply terminal;
A rod-shaped bottom power receiving terminal provided at both notches so that one end is fixed to the bottom of the notch and the other end protrudes from the notch,
Protruding side power receiving terminals provided at both notches so that one end is fixed to the side of the notch and the other end protrudes into the notch,
An LED light source unit comprising: one or a plurality of LEDs that are electrically connected to the bottom side power receiving terminal and the side side power receiving terminal and are mounted on a main body surface of the substrate.