JP2011086532A - Vehicular lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular lighting fixture capable of watertightly inserting and preparing a cord for a halogen lamp on an opening for mounting a discharge lamp lighting device which is formed on a housing with an HID lamp specification by lessening the number of components. <P>SOLUTION: According to a vehicular headlight 12, the cord 36 for a halogen lamp is inserted and stuck to an insertion hole 52 of a grommet 38, and watertightness and waterproofness can be secured between the cord 36 and the grommet 38. Then, a circular recessed section 54 of the grommet 38 is fitted to a circular rib 22 of the housing 10, and a seal section 50 of the grommet 38 is stuck to an end face 56 of the rib 22. Furthermore, the seal section 50 of the grommet 38 is elastically stuck to the end face 56 of the rib 22 since a stay 40 mounted on the grommet 38 is fixed on a boss 26 with a screw 34, the watertightness and the waterproofness can be secured between the grommet 38 and the opening 18, and dropping-out of the grommet 38 from the housing 10 can be prevented. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicular lamp, and more particularly to a vehicular lamp having a housing in which an HID (High Intensity Discharge) lamp and a halogen lamp can be exchanged.

  As disclosed in Patent Document 1, a vehicular lamp that uses a HID lamp such as a metal halide lamp as a light source includes a box-type discharge lamp lighting device (ballast) called a ballast.

  In this discharge lamp lighting device, as disclosed in Patent Document 2, an igniter unit including a transformer that generates a high-pressure pulse to start the lamp and an inverter unit that stably lights the lamp after the lamp is started are incorporated in an outer case. It is configured. This outer case is attached to a discharge lamp lighting device mounting opening that is opened in the housing of the vehicle headlamp via a waterproof packing. Since the housing for HID lamp specifications has an opening for mounting the discharge lamp lighting device, the housing is manufactured by a dedicated mold for forming the opening for mounting the discharge lamp lighting device.

  On the other hand, the housing of the halogen lamp specification vehicle lamp has an insertion hole through which a cord for supplying electric power to the halogen lamp is inserted, and is manufactured by a dedicated mold for forming this insertion hole. Yes. That is, the housings of both the HID lamp specification and the halogen lamp specification have the opening for mounting the discharge lamp lighting device or the insertion hole, even if the outer shape is the same, The molds for manufacturing both housings are different.

  Therefore, if the same mold is used, the manufacturing cost of the housing can be reduced, and the current market needs are higher for the HID lamp specification than for the halogen lamp specification. Has been proposed to be integrated into a HID lamp specification housing so that the housing can also be used for a halogen lamp specification. That is, it has been proposed to use the discharge lamp lighting device mounting opening formed in the HID lamp specification housing as an insertion hole for the halogen specification power supply cord.

  FIG. 8 is a cross-sectional view of a main part of a HID lamp specification housing 100, and FIG. 9 is a main part cross-sectional view showing a conventional example in which the housing 100 is also used as a halogen lamp specification housing 100.

  According to FIG. 8, a discharge lamp lighting device mounting opening 104 for mounting the discharge lamp lighting device 102 is formed at a predetermined position of the housing 100. The housing 100 has a cylindrical rib 106 protruding from the periphery of the opening 104, and a boss 110 to which a screw 108 is screwed on the outside of the rib 106.

  In the discharge lamp lighting device 102, the mounting surface of the outer case 112 is pressed against the rib 106 via the annular packing 114, and in this state, the tab 116 protruding from the side surface of the outer case 112 is screwed by the boss 110. Fixed to. The mounting surface of the outer case 112 is pressed against the packing 114 by the screwing action of the screw 108 at this time, so that the discharge lamp lighting device 102 is attached to the opening 104 with water tightness.

  On the other hand, according to FIG. 9, a power supply cord 118 of a halogen lamp specification is inserted through the opening 104. The cord 118 is inserted in close contact with the hole 122 of the cord grommet (bush) 120, thereby ensuring watertightness with the grommet 120. In addition, a groove 124 is formed around the grommet 120, and a water tightness is secured between the grommet 120 and the bracket 126 by fitting the peripheral edge 130 of the opening 128 of the bracket 126 into the groove 124. . Further, the bracket 126 is pressed against the rib 106 via the annular packing 114, and the tab 132 formed on the bracket 126 is fixed to the boss 110 by the screw 108. The bracket 126 is pressed against the packing 114 by the screwing action of the screw 108 at this time, so that watertightness is secured between the bracket 126 and the opening 104. With the above three watertight structures, the cord 118 is attached to the opening 104 with watertightness.

  With such a watertight structure, the HID lamp specification discharge lamp lighting device mounting opening 104 formed in the housing 100 can be used as an insertion hole for the halogen lamp specification power supply cord 118, and the HID lamp specification housing can be used. 100 can be commonly used as a housing for halogen lamp specifications.

JP 2000-235810 A JP 2002-367413 A

  However, the water-tight structure of the conventional cord shown in FIG. 9 is water-tight at three points between the cord 118 and the grommet 120, between the grommet 120 and the bracket 126, and between the bracket 126 and the opening 104. Because of the watertight structure that gives the water, there is a problem that the number of parts increases unnecessarily.

  The present invention has been made in view of such circumstances, and when the HID lamp specification housing is commonly used as the halogen lamp specification housing, the discharge lamp lighting device mounting opening formed in the housing is provided. An object of the present invention is to provide a vehicular lamp in which a cord for a halogen lamp can be inserted and arranged with good water tightness by reducing the number of parts.

  In order to achieve the above object, the present invention provides a discharge lamp lighting device mounting opening to which a discharge lamp lighting device for supplying power to an HID lamp is mounted, and the discharge lamp lighting device mounting opening. In a vehicular lamp including a structure for using a housing for an HID lamp including a rib having a shape as a housing for a vehicular lamp, the structure is a recess that is fitted into the rib of the housing. A bush having a cord insertion hole through which a cord for supplying electric power to the halogen lamp is closely inserted, and a bush mounting member disposed so as to cover the concave portion of the bush. The mounting member is fixed to the housing by a fastening member, so that the structure covers the opening for mounting the discharge lamp lighting device. To provide a vehicular lamp, characterized in that fixed to the managing.

  According to the present invention, first, the cord for the halogen lamp is inserted in close contact with the cord insertion hole of the bush to ensure water tightness between the cord and the bush. Next, the recess of the bush is fitted to the rib on the housing side, and the cord is elastically fixed to the opening for mounting the discharge lamp lighting device via the bush. Next, a bush mounting member is attached to the rear surface of the bush, and the bush mounting member is fixed to the housing by a fastening member, so that the recess of the bush is brought into close contact with the rib on the housing side, and the bush and the discharge lamp lighting device mounting opening The water-tightness between the housing and the housing is prevented, and the bushing from falling off the housing is prevented.

  Thus, according to the present invention, the watertight structure of the cord is a structure that provides watertightness at two locations between the cord and the bush and between the bush and the discharge lamp lighting device mounting opening. That is, in the present invention, a recess is provided in the bush, and the recess is directly fitted to the rib on the housing side, so that the bush is also used as a conventional packing and the number of parts is reduced. Thus, according to the present invention, the cord for the halogen lamp can be inserted into the opening for mounting the discharge lamp lighting device formed in the HID lamp specification housing with a reduced number of parts and arranged with good water tightness.

  The screw as the fastening member for fixing the bush mounting member of the present invention to the housing may be fastened to a screw hole provided in the housing for fastening the discharge lamp lighting device to the housing. preferable.

  According to the present invention, since the screw hole for fastening the discharge lamp lighting device to the housing is used as the screw hole for fastening the bush mounting member, a dedicated screw hole for fastening the bush mounting member is provided in the housing. This is no longer necessary and can contribute to common housing.

  As described above, according to the vehicular lamp of the present invention, the watertight structure of the cord has watertightness at two locations between the cord and the bush and between the bush and the discharge lamp lighting device mounting opening. Since the number of parts has been reduced by combining the bushing with the conventional packing, the halogen lamp cord is reduced in the opening for mounting the discharge lamp lighting device formed in the HID lamp specification housing. It can be inserted and placed with good water tightness.

Cross-sectional view of the main part of a vehicle headlamp with a halogen lamp specification using a HID specification housing Sectional drawing of the principal part of the vehicle headlamp made into the HID lamp specification using the housing shown in FIG. Exploded perspective view showing rib, packing and discharge lamp lighting device 1 is an enlarged view of the main part of FIG. The perspective view which looked at the watertight structure which consists of a grommet and a stay from the surface side The perspective view which looked at the watertight structure shown in Drawing 5 from the back side FIG. 5 is a perspective view of a main part in which the watertight structure shown in FIG. 5 is mounted on a housing. Cross section of the main part of the HID lamp specification housing FIG. 8 is a cross-sectional view of an essential part showing a conventional example in which the housing shown in FIG. 8 is also used as a halogen lamp specification housing.

  Hereinafter, preferred embodiments of a vehicular lamp according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a cross-sectional view of a main part of a vehicle headlamp 12 according to an embodiment in which a halogen lamp specification is made using a HID specification housing 10. FIG. 2 is a cross-sectional view of a main part of a vehicle headlamp 14 having an original HID lamp specification using the housing 10.

  The vehicle headlamps 12 and 14 shown in these drawings have a front lens attached to a front opening portion (not shown) of the housing 10, and are not shown in a lamp chamber 16 defined by the front lens and the housing 10. A light source (a halogen lamp in the case of FIG. 1, an HID lamp in the case of FIG. 2), a reflector, and the like are arranged at predetermined positions. According to the vehicle headlamps 12 and 14 configured in this way, when the light source is turned on, the light is reflected by the reflector toward the front lens and is irradiated to the front of the vehicle through the front lens. The Thereby, the light distribution required for the vehicle headlamps 12 and 14 is formed in front of the vehicle.

  As described above, the housing 10 is an HID lamp specification housing, that is, a discharge lamp lighting device mounting opening (hereinafter referred to as an opening) 18 is formed at a predetermined position of the housing 10 as shown in FIG. Has been. A discharge lamp lighting device 20 for supplying power to the HID lamp is attached to the opening 18. In the embodiment, the object is to commonly use the HID lamp specification housing 10 as the halogen lamp specification housing 10.

  The housing 10 is a resin molded product, and an annular rib 22 is integrally formed around the opening 18 as shown in FIG. A convex boss 26 having a screw hole 24 is integrally formed on the outside of the rib 22. The bosses 26 are formed to protrude at predetermined positions around the ribs 22.

  When the housing 10 is used in the HID lamp specification, in FIG. 2, the mounting surface 28A of the outer case 28 of the discharge lamp lighting device 20 is pressed against the rib 22 via the annular packing 30, and in this state, the outer case The tabs 32, 32... Protruding from the side surfaces 28 are fixed to the bosses 26, 26. At this time, the mounting surface 28A of the outer case 28 is pressed against the packing 30 by the pushing action of the outer case 28 by screwing of the screws 34, so that the discharge lamp lighting device 20 has water tightness and waterproofness in the opening 18. It is attached.

  By the way, when the housing 10 has a halogen lamp specification as shown in FIG. 1, the two cords 36 and 36 for the halogen lamp are arranged from the inside of the housing 10 to the outside of the housing 10 through the opening 18. Is done. In order to insert and arrange the cord 36 in the opening 18 with watertightness, the vehicle headlamp 12 of the embodiment has a watertight structure including a grommet (bush) 38 and a stay (bush attachment member) 40. Yes.

  4 is an enlarged view of the main part of FIG. 1. FIG. 5 is a perspective view of the watertight structure 42 composed of the grommet 38 and the stay 40 as viewed from the surface side. FIG. 6 is the watertight shown in FIG. FIG. 7 is a perspective view of the structure 42 as seen from the back side, and FIG. 7 is a perspective view of a main part in which the watertight structure 42 shown in FIG.

  As shown in FIG. 4, the grommet 38 is a grommet with a film made of rubber and configured in a double cylinder structure. The grommet 38 has a diameter that can cover the circular opening 18.

  The grommet 38 includes an outer cylinder 44, an inner cylinder 46, and a disk-shaped film body 48 that seals one circular opening. Specifically, the outer cylinder 44 and the inner cylinder 46 are integrally formed via an annular seal portion 50, and the film body 48 is integrally formed on the inner cylinder 46. Insertion holes 52 and 52 through which the cord 36 is inserted are formed in the thick part 48A of the film body 48. The diameter of the insertion hole 52 is set smaller than the diameter of the cord 36. Therefore, when the cord 36 is inserted through the insertion hole 52, the cord 36 is inserted into the edge portion of the insertion hole 52 in a state of being in close contact with the elasticity of the edge portion. Thereby, watertightness and waterproofness are ensured between the cord 36 and the grommet 38.

  Further, as shown in FIG. 6, the grommet 38 is formed with an annular and cylindrical recess 54. The recess 54 is defined by the outer cylinder 44, the inner cylinder 46, and the seal portion 50 of the grommet 38. As shown in FIG. 4, the concave portion 54 is fitted into the annular rib 22 of the housing 10, and the seal portion 50 is brought into close contact with the end surface 56 of the rib 22. Accordingly, the grommet 38 is fitted to the rib 22 by the elasticity of the outer cylinder 44 and the inner cylinder 46, and the opening 18 is sealed by the grommet 38. Further, as shown in FIG. 6, the inner peripheral surface 58 of the outer cylinder 42 is provided with a seal portion formed in a sawtooth shape, and the inner peripheral surface 58 is elastically pressed and abutted against the outer peripheral surface of the rib 22. Thereby, the watertightness and waterproofness between the grommet 38 and the rib 22 are improved.

  On the other hand, the stay 40 is a substantially triangular plate-shaped metal fitting as shown in FIGS. 5 and 7, a circular opening 60 is formed at a substantially central portion of the stay 40, and the grommet 38 is not attached to the stay 40 so that the insertion hole 52 of the cord 36 is located at the center of the opening 60. It is fixed by the fixing means shown. Therefore, the cord 36 inserted into the insertion hole 52 of the grommet 38 is wired from the center of the opening 60 of the stay 40 to the outside.

  Further, at predetermined positions on the outer peripheral portion of the stay 40, three through holes 62, 62... Through which the screws 34 (see FIG. 4) are inserted are formed. These through holes 62, 62... Are opened at positions corresponding to the three bosses 26, 26. Therefore, the screw 34 inserted through the through holes 62, 62... Is screwed into the screw holes 24 of the bosses 26, 26. That is, as the boss 26 that fastens the stay 40 to the housing 10, the boss 26 that fastens the discharge lamp lighting device 20 of FIG. 2 to the housing 10 is commonly used. Therefore, there is no need to provide a dedicated boss for fastening the stay 40 in the housing 10, which contributes to the common use of the housing 10. Similarly, the screw 34 is commonly used.

  When the stay 40 is fixed to the housing 10 using the screw 34 as described above, the seal portion 50 of the grommet 38 that is in contact with the stay 40 due to the pushing action of the stay 40 by screwing of the screw 34 is as shown in FIG. The end face 56 of the rib 22 is brought into close contact with elasticity. The close contact between the seal portion 50 and the end face 56 of the rib 22 ensures water tightness between the grommet 38 and the opening 18 and prevents the grommet 38 from falling off the housing 10.

  Next, the characteristics of the vehicle headlamp 12 of the embodiment using the HID lamp specification housing 10 as the halogen lamp specification housing 10 will be described.

  In order to achieve a watertight structure for inserting and arranging the cord 36 into the opening 18 with high water tightness, the vehicle headlamp 12 according to the embodiment firstly inserts the cord 36 for the halogen lamp into the insertion hole of the grommet 38. 52, the water-tightness and waterproofness between the cord 36 and the grommet 38 are secured.

  Next, the annular recess 54 of the grommet 38 is fitted into the annular rib 22 of the housing 10, and the seal portion 50 of the grommet 38 is brought into close contact with the end surface 56 of the rib 22. As a result, the grommet 38 is fitted to the rib 22, and the cord 36 is elastically fixed to the opening 18 via the grommet 38.

  Next, the stay 40 attached to the grommet 38 is fixed to the boss 26 with the screw 34, so that the seal portion 50 of the grommet 38 is brought into close contact with the end face 56 of the rib 22 with elasticity, and the grommet 38, the opening 18, Water-tightness and waterproofness are ensured, and the grommet 38 is prevented from falling off the housing 10. With the above structure, the cord 36 is inserted and disposed in the opening 18 with high water tightness.

  As described above, according to the vehicle headlamp 12 of the embodiment, the watertight structure of the cord 36 is provided at two places between the cord 36 and the insertion hole 52 of the grommet 38 and between the grommet 38 and the opening 18. The structure is watertight. That is, in the embodiment, the grommet 38 is provided with an annular recess 54 and the recess 54 is directly closely fitted to the rib 22 of the housing 10, so that the grommet 38 itself is also used as a conventional packing and the number of parts is reduced. .

  Thus, according to the vehicle headlamp 12 of the embodiment, the halogen lamp cord 36 is inserted into the opening 18 formed in the housing 10 of the HID lamp specification with good water tightness by reducing the number of parts. can do.

  In the embodiment, the fitting portion of the housing 10 is a cylindrical rib 22 provided around the opening 18, and the fitting portion of the grommet 38 is an annular concave portion 54 fitted into the rib 22. Therefore, the watertightness between the grommet 38 and the opening 18 is solid. The watertight structure between the grommet 38 and the opening 18 is not limited to the above structure, and any structure may be used as long as a watertight effect can be obtained. Further, the shape of the rib 22 is not limited to an annular shape, and the shape of the recess 54 is not limited to an annular shape.

  The purpose of the present invention is to share the HID lamp specification housing 10 with other lamp specification housings 10. That is, in the embodiment, the halogen lamp is exemplified as the lamp shared with the HID lamp, but the invention is not necessarily limited thereto. For example, when an LED lamp is exemplified as another lamp specification, an LED power supply cord is inserted and disposed in the opening 18 of the housing 10, and the watertight structure described in the embodiment is applied as the watertight structure of the cord. Can do. Accordingly, the HID lamp specification housing 10 can be commonly used for the LED lamp specification housing.

  DESCRIPTION OF SYMBOLS 10 ... Vehicle headlamp, 12 ... Vehicle headlamp, 14 ... Vehicle headlamp, 16 ... Lamp chamber, 18 ... Discharge lamp lighting device attachment opening, 20 ... Discharge lamp lighting device, 22 ... Rib 24 ... Screw hole, 26 ... Boss, 28 ... Exterior case, 30 ... Packing, 32 ... Tab, 34 ... Screw, 36 ... Cord, 38 ... Grommet, 40 ... Stay, 42 ... Watertight structure, 44 ... Outer cylinder, 46 ... Inner cylinder, 48 ... Film body, 50 ... Sealing part, 52 ... Insertion hole, 54 ... Recess, 56 ... End face, 58 ... Inner peripheral surface, 60 ... Opening part, 62 ... Through hole

Claims (2)

A housing for an HID lamp, comprising: a discharge lamp lighting device mounting opening to which a discharge lamp lighting device for supplying power to the HID lamp is mounted; and a rib having a shape along the discharge lamp lighting device mounting opening. In a vehicle lamp provided with a structure for using as a housing for a vehicle lamp,
The structure is
A bush having a recess fitted to the rib of the housing and a cord insertion hole through which a cord for supplying power to the halogen lamp is inserted in close contact;
A bush mounting member arranged to cover the recess of the bush,
The vehicular lamp, wherein the bushing mounting member is fixed to the housing by a fastening member, so that the structure is fixed to the housing so as to cover the discharge lamp lighting device mounting opening.   2. The vehicle according to claim 1, wherein a screw that is the fastening member that fixes the bush mounting member to the housing is fastened to a screw hole provided in the housing in order to fasten the discharge lamp lighting device to the housing. Lamps.

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