JP4479369B2 - Lighting device - Google Patents

Description

  The present invention relates to an illuminating device having a discharge lamp lighting device used for a vehicular illuminating lamp or the like.

In this type of conventional lighting device, a discharge lamp lighting device (see, for example, Patent Document 1) houses a mounting substrate 100 on which components constituting a lighting circuit are mounted in a case body 101 as shown in FIGS. The opening of the case body 101 is closed by a mounting flange 102 serving as a lid via a seal member. In order to attach the discharge lamp lighting device to the lamp body 103 of the vehicle, a cylindrical portion 105 projects from the surface of the mounting flange 102, and a hole 106 through which the connector of the mounting board 100 is exposed is formed inside. On the other hand, the lamp body 103 is formed with an opening 104 for fitting and fixing the cylindrical portion 105 via a seal member. A lamp socket 108 is connected to the tip of a harness 109 connected to the connector through the hole 106. Reference numeral 107 denotes an input connector.
JP2002-367413

  In order to ensure waterproofness, it is necessary to interpose a sealing member such as waterproof packing between the tubular portion 105 and the opening 104 of the lamp body 103 and between the mounting flange 102 and the case main body 101. In addition, in order to ensure the fitting between the cylindrical portion 105 and the case main body 101, a simple configuration such as sheet metal processing cannot be adopted as the mounting flange 102, and aluminum is like a die-cast. End up. As a result, necessary members such as a seal member and die cast are generated, and the cost is increased.

  In recent years, a system using an HID lamp as a light source for a headlamp has begun to spread in small cars and light cars, and along with this, lamps have also been downsized. Therefore, this type of lighting device is also desired to be an in-vehicle discharge lamp lighting device that is small, thin, lightweight, and highly reliable.

  In addition, when operating the steering wheel when turning left or right at a curve or intersection, AFS (Adaptive Front Lighting System) that illuminates the direction of travel of the curve or intersection, etc., is linked with a part of the headlight reflector. In that case, an actuator for moving the reflector may be installed on the lower surface of the lamp body to which the lighting device is conventionally attached, and the ease of mounting of the lighting device is also desired.

  Accordingly, an object of the present invention is to provide a lighting device that can be reduced in cost and reduced in overall cost, can be mounted in various places, and can be reduced in size and thickness.

In the lighting device of the present invention, the lamp body has a lighting device mounting hole. The case body is a cylindrical body having one end opened and the one end closely fitted to the lighting device mounting hole via a seal member, and the one end of the cylindrical body is fitted to the lighting device mounting hole. A flange covering the edge of the lighting device mounting hole in the combined state is provided on the outer peripheral surface of the cylindrical body. A mounting board is housed in the case body and mounts lighting circuit components. The lid has an output opening through which the output portion of the mounting substrate is inserted, and closes the opening of the case body. The lamp socket is connected to the output portion through the output opening by an output line and is held in the lamp body. The fixing means fixes the lamp body and the case main body in a state where the case main body is fitted into the lighting device mounting hole and the collar covers the edge of the lighting device mounting hole. The fixing means protrudes from an inner flange formed on an inner periphery of the lighting device mounting hole and has a notch, and an edge of an opening of the case body, and the case body is closely fitted to the lighting device mounting hole. The engaging piece is inserted into the notch when mating, and the case main body rotates to lock the inner collar. Further, the seal member is an O-ring, interposed between the outer periphery of the cylindrical body and the inner periphery of the lighting device mounting hole into which the cylindrical body is fitted, and is formed in the lighting device mounting hole The seal member is sandwiched between the inner collar and the collar on the outer peripheral surface of the cylindrical body and compressed, so that the seal member is placed between the outer circumference of the cylindrical body and the inner circumference of the lighting device mounting hole. The surface is close.
In another illumination device of the present invention, instead of the fixing means having the above-described configuration, the fixing means includes an attachment piece protruding from the collar, an attached portion provided on the lamp body, and the case body. And an attachment for attaching the attachment piece to the attachment portion in a state where the attachment piece is closely fitted to the lighting device attachment hole.

  In the above configuration, the lighting device mounting hole of the lamp body is an opening for replacing a discharge lamp provided at a rear portion of the lamp body and mounted on the lamp socket.

  The said structure WHEREIN: The recessed part for rotation operation for rotating the said case main body on the opposite side to the said opening rather than the said collar of the said case main body is formed.

  According to the illuminating device of the present invention, the case body has a cylindrical shape and has a flange on the outer periphery, and since the opening side of the case is closely fitted to the lighting device mounting hole of the lamp body via the seal member, the lid is Since it is located inside the lighting device mounting hole of the body, a sealing member is not required between the lid and the opening of the case main body, and the cost can be reduced. In addition, since the opening side of the case main body serves as the cylindrical portion of the conventional example, it can be made smaller and thinner and lighter than the conventional example.

  If the lighting device mounting hole of the lamp body is an opening for replacing the discharge lamp at the rear of the lamp body, the discharge lamp lighting device also serves as a valve cap that closes the opening. This eliminates the need for the valve cap that was required when the unit was attached to the unit, further reducing costs, and providing a space for placing AFS components (actuators, etc.) at the bottom of the unit. However, it is possible to reduce the size.

  By forming an engagement piece on the opening edge of the case body, forming a notch in the inner collar of the lighting device mounting hole, and inserting the case body into the lighting device mounting hole so that the case body can be attached by rotating, Installation work can be facilitated.

  When the attachment piece is provided on the collar and the case main body is attached to the lamp body using an attachment piece such as a screw, the replacement of the discharge lamp lighting device is facilitated.

  By providing the recess in the case body, the case body can be easily grasped by hand, and the workability of rotating and fixing the case body can be improved. Further, the inner surface of the case main body protrudes at the position of the recess and approaches the component of the mounting substrate, so that heat can be easily radiated to the case main body, and the temperature rise of the component can be reduced.

  A first embodiment of the present invention will be described with reference to FIGS. In a lighting device such as a vehicle headlamp, a discharge lamp lighting device is mounted in the lighting device mounting hole 2 of the lamp body 1. In the discharge lamp lighting device, a case body 4 for housing the mounting substrate 3 is formed of a cylindrical body, an opening 5 is formed at one end of the case body 4, a collar 6 is formed on the outer peripheral surface, and the opening 5 is covered with a lid 7. Blocked.

  The mounting substrate 3 is a printed circuit board on which components constituting a lighting circuit for lighting the discharge lamp 8 are mounted. The lighting circuit is a DC power obtained from a DC power source via an input connector connected to the input unit. Is converted into AC power, and power is supplied to the discharge lamp 8 via an output connector connected to the output section. The mounting substrate 3 is provided with a hole 9 for screw insertion.

  The case main body 4 is made of metal, and a plurality of engaging pieces 10 are projected outward from the outer peripheral surface at the edge of the opening 5. Further, a heat radiating fin 11 is provided on the side of the collar 6 opposite to the opening 5. A screw hole (not shown) that aligns with the hole 9 of the mounting board 3 is provided on the inner bottom surface of the case body 4, and a screw (not shown) is passed through the hole 9 and screwed into the screw hole. Secure to the body 4. Further, a screw hole portion 12 for fixing the lid 7 is projected from the inner bottom surface of the case body 4 toward the opening 5.

  The lid 7 is also made of metal, and has openings 13 and 14 through which the input connector and the output connector are passed, and a screw insertion portion 15 that is aligned with the screw hole portion 12. The lid 7 is fixed to the case body 4 by closing the opening 5 of the case body 4 with the lid 7, inserting the screw 16 into the screw insertion portion 15 and screwing it into the screw hole portion 12.

  The input connector 24 is connected to an input coupler for supplying a power supply voltage of a power supply line connected to a DC power supply (not shown). An output coupler of the harness 17 that is an output line is connected to the output connector 25. The harness is connected to a lamp socket 18 including an igniter circuit section that generates a high-pressure pulse to be applied to the discharge lamp 8. The discharge lamp 8 is attached to the lamp socket 18.

The lamp body 1 is provided with a reflector 19 inside, and a lighting device mounting hole 2 is formed on a side portion thereof, which is mounted on the vehicle body. The discharge lamp 8 is inserted into the reflector 19 through the socket mounting hole 20, and the lamp socket 18 is mounted in the socket mounting hole 20. The lighting device mounting hole 2 forms an inner collar 21 as a locking portion on the inner peripheral surface. The inner collar 21 has a notch (not shown) through which the engagement piece 10 is inserted. Further, a seal member 22 such as an O-ring is disposed so as to contact the inner peripheral surface of the lighting device mounting hole 2 and the inner collar 21. When the opening 5 side of the case body 4 is fitted into the lighting device mounting hole 2 and the engagement piece 10 is passed through the notch and rotated, the engagement piece 10 is locked to the inner collar 21 and the case body 4 is in an attached state. . At this time, the seal member 22 is compressed between the inner collar 21 and the collar 6 between the inner peripheral surface of the lighting device mounting hole 2 and the outer peripheral surface of the case body 4, and the surface of the seal member 22 is in close contact with these. The rotation of the case body 4 is restricted by the frictional resistance of the seal member 22 and the fixed state is maintained. The engaging piece 10 and the inner collar 21 constitute a fixing means.

  According to this embodiment, since the opening 5 of the case main body 4 is housed inside the lamp body 1, there is no need to seal the case main body 4 itself, so that member costs and assembly costs can be reduced. At the same time, the lid 7 can be configured in a simple shape such as a sheet metal, so that the cost can be reduced. On the other hand, the case body 4 and the lamp body 1 can be easily fitted with an O-ring, the cost can be reduced, and the use of an annular sealing member 22 called an O-ring having a circular cross-section and a circular outer shape makes it possible to form a square shape. Compared with the packing, the stress on the sealing member 22 at the time of fitting is made uniform, and it becomes easy to ensure the sealing performance between the lighting device mounting hole 2 of the lamp body 4 and the case body 4.

  A second embodiment of the present invention is shown in FIGS. In this illumination device, the discharge lamp lighting device is attached to the opening 27 at the rear of the lamp body 1 instead of the lower part of the lamp body 1 of the first embodiment. That is, an opening 27 for replacing the discharge lamp 8 that is normally closed by a bulb cap is formed in a portion facing the lamp socket 18 at the rear portion of the lamp body 1, and this opening 27 is formed in the first embodiment. The in-vehicle discharge lamp lighting device is attached as the lighting device mounting hole shown in the embodiment. The attachment structure between the case body 4 and the lamp body 1 is the same as the attachment structure between the case body 4 and the lamp body 1 in the first embodiment. That is, a plurality of, for example, four engaging pieces 10 are provided on the edge of the opening 5 of the case body 4. The protruding direction of the engaging piece 10 is a direction protruding from the outer peripheral surface of the case body, that is, a radial direction. A notch 28 through which the engagement piece 10 is inserted is formed in the inner collar 21 of the opening 27 which is a lighting device mounting hole. Therefore, the case main body 4 is closely fitted to the opening 27 via the seal member 22, and the case main body 4 is rotated and prevented from being removed by passing the engagement piece 10 through the notch 28. The other configuration is the same as that of the first embodiment.

  According to the second embodiment, the discharge lamp lighting device is not located below the lamp body 1 and a space exists, and an actuator or the like for operating the reflector unit in the AFS can be installed in the space. It becomes possible. Therefore, it is possible to reduce the size of the headlamp as a whole, and to reduce the number of work steps when assembling the lamp body and to facilitate work during maintenance of the discharge lamp. Furthermore, a valve cap is unnecessary.

  Note that the number of the engagement pieces 10 and the notches 28 is not limited to four.

  A third embodiment of the present invention will be described with reference to FIGS. In this lighting device, instead of the fixing means constituted by the engagement piece 10 and the inner collar 21 of the first embodiment, the fixing means is configured as follows. That is, a plurality of, for example, three attachment pieces 29 are projected from the collar 6 of the case body 4. Each attachment piece 29 is formed with an attachment hole 30. On the other hand, a screw hole 35 as an attached portion is formed in the lamp body 6 so as to face the attachment piece 29.

  The case body 4 is closely fitted into the lighting device mounting hole 2 of the lamp body 1 via the seal member 22, and the case body 4 is fixed to the lamp body 1 by tightening the mounting hole 30 through the screw 36 and the screw hole 35. Others are the same as in the first embodiment.

  According to the third embodiment, it is possible to perform the lamp body 1 and the case main body 4 by tightening the fixture, for example, the screw 36, and it is easy to replace the discharge lamp lighting device. This discharge lamp lighting device can be applied to the second embodiment in which the lighting device mounting hole is provided on the rear surface of the lamp body in addition to the first embodiment in which the lighting device mounting hole is provided on the lower surface of the lamp body 4. it can.

  In addition, although the screw hole 35 is bottomed in consideration of waterproofing, the screw hole 35 may be configured so as not to communicate with the inside of the lamp body 1. Further, it is preferable that the inner collar 21 exists for supporting the sealing member 22. Furthermore, the fixture is not limited to a screw but may be other means.

  A fourth embodiment of the present invention will be described with reference to FIG. In the first embodiment and the second embodiment, this illumination device has a recess 32 formed by cutting out a part of the outer peripheral surface on the opposite side of the opening 5 from the collar 6 of the case body 4. The shape of the recess 32 is the same as that of FIG. 8 of the third embodiment, but is formed so as to open to the end face at two locations on the outer peripheral surface with a substantially V-shaped cross section.

  According to the fourth embodiment, when the case main body 4 is inserted into the lighting device mounting hole 2 of the lamp body 1 and rotated, the recess 32 becomes a catch of the hand, so that the case main body 4 can be easily grasped. 4 is easy to rotate. For this reason, work efficiency increases and assembly cost can be reduced. Moreover, since the inner side of the case main body 4 of the recessed part 32 approaches the component of the mounting substrate 3, the heat radiation to the case main body 4 is facilitated, and the temperature rise of the component can be reduced.

The engagement piece 10 may be formed by an elastic claw so that the notch 28 of the inner collar 21 is eliminated.
Moreover, what is necessary is just the latching | locking part which latches not only the inner collar 21 but the engagement piece 10. FIG.

It is sectional drawing of 1st Embodiment of this invention. It is a perspective view of a discharge lamp lighting device. FIG. It is sectional drawing of 2nd Embodiment. It is a top view of a discharge lamp lighting device. It is a rear view of the lamp body of the state which attached the discharge lamp lighting device. It is a rear view of the lamp body of the state which removed the discharge lamp lighting device. It is a perspective view of the discharge lamp lighting device of 3rd Embodiment. It is sectional drawing of the lamp | ramp body which attached the discharge lamp lighting device. It is a perspective view of the discharge lamp lighting device of 4th Embodiment. It is a disassembled perspective view of the discharge lamp lighting device of a prior art example. It is sectional drawing of an illuminating device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lamp body 2 Lighting device attachment hole 3 Mounting board 4 Case main body 5 Opening 6 Collar 7 Lid 8 Discharge lamp 9 Hole 10 Engagement piece 14 Output opening 21 Inner collar 22 Seal member 27 Opening 28 Notch 29 Attachment piece 32 Recessed part

Claims (4)

A lamp body having a lighting device mounting hole; and a cylindrical body that has one end opened and the one end is closely fitted to the lighting device mounting hole via a seal member, the one end of the cylindrical body being A case main body having a collar covering the edge of the lighting device mounting hole in the state where it is fitted in the lighting device mounting hole, and a mounting substrate that is housed in the case main body and mounted with a lighting circuit component A lid having an output opening through which the output portion of the mounting substrate is inserted and closing the opening of the case body, and connected to the output portion through the output opening by an output line and held in the lamp body A lamp socket, and a fixing means for fixing the lamp body and the case main body in a state where the case main body is fitted in the lighting device mounting hole and the collar covers an edge of the lighting device mounting hole. wherein the fixing means, the An inner collar with a notch formed on the inner periphery of the lamp device mounting hole, and protruding at the edge of the opening of the case body, and when the case body is closely fitted into the lighting device mounting hole, The sealing member is an O-ring, and the outer periphery of the cylindrical body and the cylindrical body are fitted to each other. It is interposed between the inner periphery of the lighting device mounting hole, and is sandwiched and compressed between the inner collar formed in the lighting device mounting hole and the collar of the outer peripheral surface of the cylindrical body. Thus, the lighting device in which the surface of the seal member is in close contact between the outer periphery of the cylindrical body and the inner periphery of the lighting device mounting hole . A lamp body having a lighting device mounting hole formed with an inner collar, and a cylindrical body having one end opened and the one end closely fitted to the lighting device mounting hole via a seal member, the cylindrical body A case main body having a flange that covers an edge of the lighting device mounting hole in a state in which the one end portion is fitted in the lighting device mounting hole, and a lighting circuit component housed in the case main body Mounted on the mounting substrate, a lid having an output opening through which the output portion of the mounting substrate is inserted and closing the opening of the case body, and connected to the output portion through the output opening by an output line. With the lamp socket held in the lamp body, the case body fitted into the lighting device mounting hole, and the collar covering the edge of the lighting device mounting hole, the lamp body and the case body Fixing means for fixing, and The fixing means includes an attachment piece projecting from the collar, an attachment portion provided on the lamp body, and the attachment piece in the state where the case main body is closely fitted to the lighting device attachment hole. And the seal member is an O-ring, interposed between the outer periphery of the cylindrical body and the inner periphery of the lighting device mounting hole into which the cylindrical body is fitted, and By being sandwiched and compressed between the inner collar formed in the lighting device mounting hole and the collar on the outer peripheral surface of the cylindrical body, the outer periphery of the cylindrical body and the inner side of the lighting device mounting hole are compressed. A lighting device in which the surface of the sealing member is in close contact with the periphery . The lighting device according to claim 1, wherein the lighting device mounting hole is an opening for replacing a discharge lamp provided at a rear portion of the lamp body and attached to the lamp socket . The lighting device according to claim 2, wherein a recess for rotating operation for rotating the case body is formed on the opposite side of the opening from the collar of the case body .

Images