JP2011187397A - Wire harness holding structure of vehicular lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire harness holding structure of a vehicular lamp that can surely hold a wire harness to a housing using an existing component without causing an increase in the number of components and assembling man-hours and a consequent cost increase. <P>SOLUTION: The holding structure of the wire harness 7 to the housing 2 of a head lamp (the vehicular lamp) with a work hole 2a for changing a bulb of the housing 2 covered with a removable back cover 5, is constituted to form a guide rib 2c around the back cover 5 of the housing 2 and to hold the wire harness 7 allowed to pass through a space S formed by the guide rib 2c and a stopper 5c protrusively provided at the side face of the back cover 5. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a wire harness holding structure in a vehicle lamp such as a headlamp.

  Some vehicle lamps such as headlamps have a wire harness that connects components such as a connector for connecting to a vehicle body harness, a bulb socket, a ballast, and a leveling actuator, assembled on the outside of the housing.

  In such a vehicular lamp, when the wire harness is separated from the housing, the wire harness may be damaged by contact with peripheral components, edges, maintenance tools, or the like, or conversely damage other components. In addition, the sense of quality may be impaired because the wire harness contacts other parts due to vibration and generates abnormal noise.

  Therefore, usually, the wire harness is held in the housing of the vehicular lamp. Here, the conventional example of the holding structure of the wire harness in a vehicle lamp is shown in FIGS. 7-9 (for example, refer patent documents 1-3).

  7 to 9 are partial plan sectional views showing a conventional example of a wire harness holding structure in a vehicular lamp. In the example shown in FIG. 7, a housing 102 and a rib 102a protruding integrally therewith are shown. A structure in which the wire harness 107 is sandwiched between and held is employed. In the example shown in FIG. 8, a locking claw 202 b is formed at the tip of the rib 202 a of the housing 202 using a mold slide mechanism, and the wire harness 207 is formed. The configuration is designed to make it difficult to remove.

  In the example shown in FIG. 9, the wire harness 307 is passed between the housing 302 and the screw boss 302a provided integrally therewith, and the wire harness 307 is removed by the washer 311 fixed to the screw boss 302a with the screw 310. The structure that prevents it is adopted.

JP 2006-344558 A JP 2000-0111712 A JP 2004-227933 A

  However, in the holding structure shown in FIG. 7, the wire harness 107 is simply sandwiched between the housing 102 and the rib 102a. Then, since it is necessary to form the latching claw 202b at the tip of the rib 202a of the housing 202 using a slide mechanism of the mold, there is a problem that the mold becomes complicated and the mold cost becomes high.

  In addition, the holding structure shown in FIG. 9 requires a dedicated screw 310 and a washer 311 for holding the wire harness 307, which increases the number of parts and the number of assembling steps, resulting in an increase in cost.

  The present invention has been made in view of the above problems, and the purpose of the present invention is to secure the wire harness to the housing using the existing parts without increasing the number of parts and the number of assembling steps and the associated cost increase. It is providing the wire harness holding structure of the vehicle lamp which can be hold | maintained to.

  In order to achieve the above object, the present invention provides a structure for holding a wire harness to a housing of a vehicular lamp in which a work hole for replacing a valve in a housing is covered with a detachable back cover. A configuration is adopted in which guide ribs are formed in the periphery, and the wire harness is held through a space formed by the guide ribs and stoppers protruding from the side surfaces of the back cover.

  According to the present invention, since the wire harness is held in the space formed between the stopper formed on the back cover which is an existing part and the guide rib formed on the housing, the wire harness is held. A dedicated part for doing so becomes unnecessary, and the wire harness can be securely held in the housing using the existing parts without causing an increase in the number of parts and the number of assembling steps and an accompanying cost increase. In this case, since the back cover is a component that will never come off the housing when in use, the wire harness will not come off when the vehicle lamp is incorporated in the vehicle, increasing the reliability of the vehicle lamp. It is done.

  Further, if the back cover is removed from the housing when replacing the valve, the space through the wire harness is opened, so that the wire harness can be easily removed without using a tool.

  Furthermore, since a stopper already formed on the back cover can be used as a stopper for forming a space for passing the wire harness between the guide ribs of the housing, a special mold structure is not required for forming the space. Therefore, the complexity of the mold and the accompanying cost increase can be prevented.

It is a back side perspective view of a headlamp provided with the wire harness holding structure concerning the present invention. It is the A section enlarged detail drawing of FIG. It is a partial plane sectional view of a headlamp provided with the wire harness holding structure concerning the present invention. It is the B section enlarged detail drawing of FIG. 1 is a partially exploded perspective view of a vehicular lamp to which the present invention is applicable. 1 is a partially exploded perspective view of a vehicular lamp to which the present invention is applicable. It is a fragmentary flat sectional view which shows the prior art example of the holding structure of the wire harness in a vehicle lamp. It is a fragmentary flat sectional view which shows the prior art example of the holding structure of the wire harness in a vehicle lamp. It is a fragmentary flat sectional view which shows the prior art example of the holding structure of the wire harness in a vehicle lamp.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 is a rear perspective view of a headlamp having a wire harness holding structure according to the present invention, FIG. 2 is an enlarged detail view of a portion A in FIG. 1, FIG. 3 is a partial plan sectional view of the head lamp, and FIG. FIG.

  A headlamp 1 as an embodiment of a vehicle lamp according to the present invention is provided on the left and right of a front portion of a vehicle (not shown), and is defined by a housing 2 and a lens 3 that covers a front opening thereof. The chamber 4 (see FIG. 3) is configured by housing a reflector (not shown) and a bulb such as a discharge tube (HID lamp) as a light source. Since the basic configuration of the headlamp 1 is the same for the left and right, only one headlamp 1 will be illustrated and described below.

  By the way, as shown in FIG. 3, the housing 2 is formed with a circular work hole 2a for valve replacement, and this work hole 2a is covered with a detachable bowl-shaped back cover 5. Here, the housing 2 and the back cover 5 are both formed of resin, and the back cover 5 has engaging claws 5a (see FIG. 4) formed on the periphery of the opening at the periphery of the work hole 2a of the housing 2. It is attached to the housing 2 by engaging.

  Specifically, the portion of the housing 2 in which the working hole 2a is formed has a cylindrical outer shape and bulges rearwardly, and a rib 2b is continuously rearwardly formed in a cylindrical shape at a rear end thereof. It is formed in a state protruding toward the. An inner flange formed so as to surround the work hole 2a is disposed at an inner diameter portion of the rib 2b. A plurality of cutout portions through which the engaging claws 5a can pass at intervals in the circumferential direction are formed at the opening edge of the inner flange serving as the working hole 2a corresponding to the positions of the engaging claws 5a.

  As shown in FIG. 5, the back cover 5 (15) is a substantially disk-shaped bowl-shaped member, and has an outer diameter that can be accommodated within the inner diameter of the rib 2 b of the housing 2. An engaging claw 5 a is disposed so as to protrude from the end portion of the outer diameter (the portion corresponding to the flange-shaped edge) into the lamp chamber 4.

Further, as shown in detail in FIG. 4, a flange 5b is formed on the outer periphery of the back cover 5 so as to face the inner flange of the housing 2, and a stopper 5c is provided on the side of the flange 5b. Projected as a single unit. The rib 2b of the housing 2 where the stopper 5c is arranged in the assembled state has a lower height (projecting height backward) than the rib 2b of the other part, and the stopper 5c is arranged. This is a notch for the stopper. The stopper 5c passes through the stopper notch of the rib 2b and extends from the inner diameter side of the rib 2b to the outside of the rib 2b. When the back cover 5 is attached to the housing 2, the engagement claw 5 a formed on the periphery of the opening is inserted into the inner flange of the housing 2 with the ring-shaped packing 6 fitted on the outer periphery of the back cover 5. The back cover 5 is moved forward and inserted into the inner diameter of the rib 2b with the stopper 5c aligned with the stopper notch of the rib 2b. The engaging claw 5a passes through the notch portion of the inner flange to the front side, the engaging claw 5a passes through the work hole 2a of the housing 2, and the stopper 5c is disposed in the stopper notch of the rib 2b.

  When the back cover 5 is pushed in until the stopper 5c formed on the side of the back cover 5 comes into contact with the end face of the rib 2b of the housing 2, the packing 6 fitted on the outer periphery of the back cover 5 is attached to the back cover 5. The flange 5b and the inner flange that is the peripheral surface of the work hole 2a of the housing 2 are pressed against and crushed. As a result, the space between the work hole 2a and the back cover 5 is waterproofed.

  Therefore, when the back cover 5 is rotated in a predetermined direction (for example, the direction opposite to the arrow in FIG. 5) by a predetermined angle, the stopper 5c comes into contact with the edge of the stopper notch of the rib 2b and further rotates. Since the engagement claw 5a passes through the work hole 2a of the housing 2 and is disposed on the back side of the inner flange and engages with the peripheral edge of the work hole 2a of the housing 2 as shown in FIG. 1 to 4 is attached to the housing 2 to close the working hole 2a of the housing 2. At this time, the stopper 5c protruding from the side of the back cover 5 abuts against the end surface of the rib 2b of the housing 2, so that the back cover 5 can be prevented from further protruding into the housing 2, and the back cover can be prevented. 5 is crushed between the flange 5b of the back cover 5 and the peripheral surface of the work hole 2a of the housing 2, so that the sealing effect of the packing 6 allows the packing 6 to be inserted into the lamp chamber 4 from the outside. Intrusion of water and dust is prevented. The stopper 5c formed on the back cover 5 also functions to prevent over-rotation of the mark and the back cover 5 when the back cover 5 is fitted into the housing 2.

  Thus, in the present embodiment, a part of the rear surface of the housing 2, specifically, in the vicinity of the work hole 2 a and adjacent to the stopper 5 c of the back cover 5 that closes the work hole 2 a, A rectangular plate-like guide rib 2c standing upright is integrally projected toward the rear of the vehicle (downward in FIGS. 3 and 4), and a recess 2d is formed on the back of the housing 2 inside the guide rib 2c. Yes.

  Specifically, the guide rib 2c is formed on the rear surface of the housing 2 toward the rear of the vehicle with a space in which the wire harness 7 can be stored between the outer surface of the cylindrical bulging portion of the housing 2 in which the work hole 2a is formed. The guide rib 2c is erected so that the rear end of the guide rib 2c protrudes rearward to a height (projection height backward) substantially equal to the edge of the stopper notch. And the recessed part 2d is comprised by the outer surface of the cylindrical swelling part of the housing 2, and the guide rib 2c. In addition, when the recessed part 2d becomes deep compared with the thickness of the wire harness 7, the rib which connects between the said outer surface and the guide rib 2c is formed, and the position of the wire harness 7 is controlled more correctly. be able to. In this case, the strength of the guide rib 2c can be improved. In the state where the back cover 5 is attached to the housing 2 as shown in the drawing, the tip of the stopper 5c protruding from the side of the back cover 5 is close to the rear tip of the guide rib 2c (specifically, the wire harness 7 In order to cover (close) a part (or all) of the concave portion 2d formed in the rear surface of the housing 2 at the position of the opening to the rear of the vehicle. A space S is formed between the stopper 5 c and the guide rib 2 c of the housing 2.

  Incidentally, in the headlamp 1, a wire harness 7 for connecting components such as a connector for connecting to a vehicle body harness (not shown), a bulb socket, a ballast, a leveling actuator, etc. is provided around the back cover 5 (housing 2) as shown in FIG. 2 and 4, the wire harness 7 protrudes from the guide rib 2 c formed on the housing 2 and the side surface of the back cover 5. A part thereof is held by passing through the space S formed by the stopper 5c provided.

  That is, a space S through which the wire harness 7 surrounded by the stopper 5c, the housing 2, and the guide rib 2c of the housing 2 passes is formed, and the wire harness 7 is held in this space S. The wire harness 7 is held by placing the wire harness 7 in the recess 2d formed by the guide rib 2c of the housing 2 before the back cover 5 is attached to the housing 2, and then housing the back cover 5 in the manner described above. By attaching to 2, the wire harness 7 is held in a state of being sandwiched in the space S. Since the tip of the stopper 5c is disposed close to the rear tip of the guide rib 2c, it is possible to reliably prevent the wire harness 7 from coming out of the space S and hold it.

  As described above, in the headlamp 1 according to the present embodiment, the space S formed between the stopper 5c formed on the back cover 5 which is an existing component and the guide rib 2c formed on the housing 2. Since this is held through the wire harness 7, there is no need for a dedicated part for holding the wire harness 7, and the existing parts can be used without increasing the number of parts and the number of assembling steps and the associated cost increase. It is possible to securely hold the wire harness 7 in the housing 2 by using it. In this case, since the back cover 5 is a component that will never come off the housing 2 in use, the wire harness 7 will not come off due to vehicle vibration or the like when the headlamp 1 is incorporated in the vehicle. The reliability of the headlamp 1 is improved.

  Also, if the back cover 5 is removed from the housing 2 when replacing a valve (not shown), the space S through the wire harness 7 is opened, so that the wire harness 7 can be easily removed without using a tool.

  In addition, since the stopper 5c for forming the space S for passing the wire harness 7 between the guide rib 2c of the housing 2 can be used, what is already formed on the back cover 5 can be used. There is no need for a special mold structure for forming the space S to pass through, and it is also possible to prevent the mold from becoming complicated and the accompanying cost increase.

  In the above description, the embodiment in which the present invention is applied to the headlamp 1 of the type in which the back cover 15 is rotated in the direction of the arrow as shown in FIG. As shown in FIG. 6, the present invention can be similarly applied to a headlamp or the like of a type in which the back cover 25 is fastened to the housing 22 by a plurality of screws 30 or a back cover attached by a spring hook type. it can.

  Moreover, although the form which applied this invention to the headlamp was demonstrated, this invention is applicable similarly also to the wire harness holding structure of other arbitrary vehicle lamps of the type with which a back cover is attached or detached to a housing. Of course.

1 Headlamp (vehicle lamp)
2 Housing 2a Housing working hole 2b Housing rib 2c Housing guide rib 2d Housing recess 3 Lens 4 Light chamber 5 Back cover 5a Back cover engaging claw 5b Back cover flange 6 Packing 7 Wire harness 12 Housing 15 Back cover 22 Housing 25 Back cover 30 Screw S Space

Claims (1)

A structure for holding a wire harness to the housing of a vehicular lamp in which a work hole for replacing a bulb of the housing is covered with a detachable back cover,
A guide rib is formed around the back cover of the housing, and the wire harness is held through a space formed by the guide rib and a stopper projecting from a side surface of the back cover. Wire harness holding structure for lamps.

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