Vehicular lamp

A vehicular lamp includes a lamp body formed with a hole, and an annular wall surrounding a peripheral of said hole. The lamp body is formed with a boss and a hook in the vicinity of the annular wall to regulate the position of power supply cords in order not to deviate apart from the annular wall.

This patent application claims priority based on a Japanese patent application, H11-232053 filed on Aug. 18, 1999, the contents of which are incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a vehicular lamp including a back cover. More particularly, the present invention relates to a structure for retaining power supply cords for the vehicular lamp.

2. Description of the Related Art

Generally, as shown in FIG. 5 , a vehicular lamp such as a headlamp is formed with a lamp body 102 having an opening 102 a for exchanging a light source bulb. The lamp body 102 is also formed with an annular wall 102 b at the peripheral of the opening 102 a. A back cover 104 is designed to be attached to the annular wall 102 b to cover the opening 102 a. As shown in FIG. 5 , the conventional vehicular lamp includes a power supply cord 106 running in the vicinity of the annular wall 102 b.

With respect to the conventional type of vehicular lamp as described above, there may be a problem where the power supply cord 106 is caught by the lamp and a vehicle body when the lamp is attached to the vehicle body. Therefore, the lamp includes a boss 102 c in the vicinity of the annular wall 102 b of the lamp body 102 to regulate the position of the power supply cord 106 so that the cord is prevented from displacing apart from the annular wall 102 b. The lamp further includes a washer 110 fixed to the boss 102 c by a screw 112 , for controlling the power supply cord 106 in order not to pop up from the desired position defined by the annular wall 102 b and the boss 102 c.

However, with respect to the above conventional vehicular lamp, the washer 110 and the screw 112 are required to retain the power supply cord 106 in order not to pop out of the desired position. Accordingly, as many parts are required, manufacturing cost for the conventional vehicular lamp is high.

SUMMARY OF THE INVENTION

Therefore, it is an object of the present invention to provide a vehicular lamp having a structure in which power supply cords are not caught by the lamp and a vehicle body when the lamp is attached to the vehicle body, without increasing the number of required parts.

The present invention relates to a vehicular lamp having a structure in which power supply cords are retained so as not to deviate from the desired position, by using a back cover for the lamp.

According to the first aspect of the present invention, a vehicular lamp includes: a light source bulb; a lamp body having a rear wall portion formed with an opening and an annular wall surrounding a periphery of the opening; a back cover attached to the annular wall to cover the opening; a power supply cord running in the vicinity of the annular wall and connecting to the light source bulb; and a cord retaining structure projecting from the rear wall portion of the lamp body in the vicinity of the annular wall, the retaining structure engaging with the power supply cord.

According to a second aspect of the invention, in the vehicular lamp, the retaining structure includes a first retaining member and a second retaining member separate from each other by a predetermined distance therebetween.

According to a third aspect of the invention, in the vehicular lamp, the first retaining member comprises a boss projecting from the rear wall portion of the lamp body and the second retaining member comprises a hook which is formed like a reverse L-shape and its tip end pointing to the annular wall.

According to a fourth aspect of the invention, in the vehicular lamp, the retaining structure further comprises a third retaining member disposed between the first and second retaining members and the light source bulb.

According to a fifth aspect of the invention, in the vehicular lamp, the back cover comprises a restricting flange extending over the power supply cord in the middle of the first retaining member and the second retaining member.

According to a sixth aspect of the invention, in the vehicular lamp, the back cover further comprises a rib extending from substantially the center thereof to the restricting flange.

According to a seventh aspect of the invention, in the vehicular lamp, the retaining structure comprises at least one wall extending along the annular wall.

According to an eighth aspect of the invention, in the vehicular lamp, the retaining structure comprises a plurality of walls extending along the annular wall.

According to a ninth aspect of the invention, in the vehicular lamp, the back cover comprises a restricting flange extending over the power supply cord.

According to a tenth aspect of the invention, in the vehicular lamp, the back cover further comprises a rib extending from substantially the center thereof to the restricting flange.

According to an eleventh aspect of the invention, in the vehicular lamp, the wall comprises a cut-out portion.

According to a twelfth aspect of the invention, in the vehicular lamp, the retaining structure is formed integrally with the rear wall portion of the lamp body by injection molding.

According to a thirteenth aspect of the invention, in the vehicular lamp, the restricting flange is formed integrally with the back cover by injection molding.

According to a fourteenth aspect of the invention, in the vehicular lamp, the restricting flange is formed integrally with the back cover by injection molding.

According to a fifteenth aspect of the-invention, the vehicular lamp further includes a clip member engaging with the power supply cord and disposed between the retaining structure and the light source bulb.

According to a sixteenth aspect of the invention, the vehicular lamp further includes a first lamp chamber installing therein a first light source bulb and a second lamp chamber formed adjacent to the first lamp chamber and installing therein a second light source bulb, wherein the power supply cord connects to the first light source bulb.

According to a seventeenth aspect of the invention, the vehicular lamp further includes a first lamp chamber installing therein a first light source bulb and a second lamp chamber formed adjacent to the first lamp chamber and installing therein a second light source bulb, wherein the power supply cord connects to both the first light source bulb and the second light source bulb.

According to an eighteenth aspect of the invention, in the vehicular lamp, the boss is conical with its top cut off.

As described above, the vehicular lamp according to the present invention has a structure in which power supply cords run in the vicinity of an annular wall, which receives a back cover. The lamp includes a retaining structure for securing the position of the power supply cords in order to prevent the cords from deviating apart from the annular wall. The back cover is formed with a restricting flange for restricting the power supply cords in order to prevent the cords from popping out of the desired position between the annular wall and the retaining structure. Therefore, when the lamp is attached to a vehicle body, the power supply cords are not caught by the lamp and the vehicle body.

As described above, the vehicular lamp according to the present invention has a retaining structure for the power supply cords which requires few parts or no additional part, which ensures that the power supply cords are not caught by the lamp and the vehicle body.

In the above structure, two parts of the retaining structures for fixing the position of the power supply cords may be formed along the periphery of the annular wall which are spaced from each other by a predetermined distance. The restricting flange of the back cover is formed at a position between two parts of the retaining structure, to reliably regulate the power supply cords and prevent it from popping out.

The power supply cords may be connected to a light source bulb installed in a center lamp chamber positioned in front of the opening or may be connected to another light source bulb installed in a chamber adjacent to the center lamp chamber. When the power supply cords are connected to the light source bulb installed in the latter chamber, the power supply cords can easily be set running.

The above summary of the invention does not necessarily describe all necessary features of the present invention. The present invention may also be a sub-combination of the above described features. The above and other features and advantages of the present invention will become more apparent from the following description of embodiments taken in conjunction with the accompanying drawings.

DETAILED DESCRIPTION OF THE INVENTION

Preferred embodiments of the present invention will now be described with reference to accompanying drawings.

FIG. 1 is a backside view showing a vehicular lamp of an embodiment of the present invention. FIG. 2 is a cross-sectional view take no line II II in FIG. 1 . FIG. 3 is an enlarged perspective view of the vehicular lamp shown in FIG. 1 .

As shown in FIGS. 1 to 3 , the vehicular lamp 10 is a combination headlamp, which functions as four-types of headlamp and a signal lamp. The vehicular lamp 10 includes a lamp body 12 , which is divided into four lamp chambers including a high beam lamp chamber 14 A, a low beam lamp chamber 14 B, a cornering-clearance lamp (a side marker lamp) chamber 14 C and a front/side turn signal lamp chamber 14 D.

The low beam lamp chamber 14 B is formed in the center of the lamp body 12 . The high beam lamp chamber 14 A is formed adjacent to the low beam lamp chamber 14 B. The cornering-clearance lamp chamber 14 C and the front/side turn signal lamp chamber 14 D are respectively formed adjacent to the low beam lamp chamber 14 B, on the opposite side of the chamber 14 A, such that the lamp chamber 14 C is positioned upward of the lamp chamber 14 D in FIG. 1 .

The lamp body 12 includes a rear wall portion 12 a which is formed with an opening 12 b at a rear side of the low beam lamp chamber 14 B. An annular wall 12 c is formed at the peripheral of the opening 12 b. The lamp body 12 includes a back cover 16 which is attached to the annular wall 12 c to cover the opening 12 b. The lamp body 12 further includes electric cords 18 C and 18 D running in the vicinity of the annular wall 12 c.

Each of the electric cords 18 C are connected at one end to a light source bulb 20 C of the cornering-clearance lamp chamber 14 C and at the other end to a connector 22 C which is fixed at the bottom edge portion of the rear wall portion 12 a. Each of the electric cords 18 D is connected at one end to a- light source bulb 20 D of the front/side turn signal lamp chamber 14 D and at the other end to a connector 22 D which is also fixed at the bottom edge portion of the rear wall portion 12 a. These electric cords 18 C and 18 D are bound together and covered by a tube 24 for a predetermined length at the vicinity of the connectors 22 C and 22 D. The power supply cords 18 C are bound together and covered by a separate tube 26 for a predetermined length, after they separate from the power 20 supply cords 18 D.

The lamp body 12 is formed with a boss 12 d (apart of retaining structure) at the rear wall portion 12 a in the vicinity of the annular wall 12 c. The part of the power supply cords 18 C and 18 D covered by the tube 24 extend between the boss 12 d and the annular 25 wall 12 c such that the power supply cords 18 C and 18 D are retained in and prevented from deviating apart from the annular wall 12 c . As best shown in FIG. 3 , according to the embodiment, the boss 12 d is conical with its top cut out.

The lamp body 12 is further formed with a hook 12 e (another part of the retaining structure) on the rear wall portion 12 a in the vicinity of the annular wall 12 c. The hook 12 e positions such that the hook 12 e and the boss 12 d are on a periphery surrounding the annular wall 12 c at a predetermined distance there between. The hook 12 e is formed like a reverse L-shape and its tip endpoints to the annular wall 12 c, as shown in FIG. 3 . Referring back to FIG. 1 , the part of the power supply cords 18 C covered by the tube 26 runs under the hook 12 e such that the cords 18 C are retained in and prevented from deviating apart from the annular wall 12 c . The lamp body 12 is also formed with a clip 12 f on the rear wall portion 12 a between the light source bulbs 20 C and 20 D, for securing the power supply cords 18 C.

According to the present embodiment, the boss 12 d and the hook 12 e are formed integrally with the rear wall portion 12 a of the lamp body 12 by an injection molding. However, the invention is not limited thereto or thereby. For example, either one of the boss 12 d and the hook 12 e maybe separately formed and attached to the rear wall portion 12 a by adhering or press fitting by means of the protrusion-and-hole engagement.

As shown in FIG. 2 , the back cover 16 is attached to the annular wall 12 c by rotating the back cover 16 around a center axis Ax of the opening 12 b with the back cover 16 contacting the annular wall 12 c. The back cover 16 is formed with a protrusion 16 a having a trapezoidal like form and protruding outwardly. A restricting flange 16 a is formed such that it positions in the middle of the boss 12 d and the hook 12 e when the back cover 16 is completely attached to the annular wall 12 c. It means that the electric cords 18 C run under the restricting flange 16 a . Therefore, the restricting flange 16 a restricts the power supply cords 18 C in order to prevent the cords from popping out of the desired place defined by the annular wall 12 c, the boss 12 d and the hook 12 e. The back cover 16 is formed with two ribs 16 b and 16 c for helping an operator's hand when attaching the back cover 16 to the annular wall 12 c by rotation. One of the ribs, the rib 16 c, extends to the edge of the restricting flange 16 a for reinforcing the restricting flange 16 a. According to the present embodiment, the restricting flange 16 a is integrally formed with the back cover 16 by an injection molding.

As described above, the vehicular lamp 10 according to the present embodiment has a structure in which the electric cords 18 C and 18 D run in the vicinity of the annular wall 12 c for receiving the back cover 18 , and the boss 12 d and the hook 12 e are formed in the vicinity of the annular wall 12 c in the lamp body 12 , spaced apart from each other by a predetermined distance. The boss 12 d and the hook 12 e retain the power supply cords 18 C and 18 D in order to prevent the cords from deviating apart from the annular wall 12 c. Furthermore, as the restricting flange 16 a is formed at the outer peripheral of the back cover 16 such that it positions in the middle of the boss 12 d and the hook 12 e, the electric cord 18 C is restricted by the restricting flange 16 a in order not to pop out of the desired position defined by the annular wall 12 c, the boss 12 d and the hook 12 e. As for the power supply cords 18 D, the power supply cords 18 D are bound with the power supply cords 18 C by the tube 24 , and the tube 24 is positioned between the boss 12 d and the annular wall 12 . Therefore, the power supply cords 18 D are retained by the boss 12 d in order not to deviate apart from the annular wall 12 c. Due to this, when the vehicular lamp 10 is attached to a vehicle body, the power supply cords 18 C and 18 D are not caught by the lamp and the vehicle body.

As described above, according to the present invention, control of the power supply cords can be realized by employing few parts and with a low cost, so that the power supply cords are not caught by the lamp and the vehicle body.

Furthermore, in the above embodiment, as the power supply cords 18 C and 18 D are respectively connected to the cornering-clearance lamp chamber 14 C and the front/side turn signal lamp chamber 14 D positioned adjacent to the low beam lamp chamber 14 B positioned in front of the opening 12 b, these power supply cords 18 C and 18 D are easily set running.

FIG. 4 is an enlarged perspective view showing another embodiment of the vehicular lamp.

In the above first embodiment shown in FIG. 1 , the boss 12 d and the hook 12 e are formed as separate parts of the retaining structure. In the present embodiment, however, the lamp body 12 is formed with a rib 12 g serving as a single retaining structure, extending along the annular wall 12 c from a first position where the boss 12 d is formed to a second position where the hook 12 e is formed in the first embodiment. The rib 12 g is formed having a cut-out portion 12 h to allow the power supply cords 18 D to pass through.

As described in this embodiment, by providing the rib 12 g, the power supply cords 18 C and 18 D are retained in order not to deviate apart from the annular wall 12 c. Furthermore, the restricting flange 16 a on the back cover 16 restricts the power supply cords 18 C in order not to pop up from the rear wall portion 12 a. Therefore, when the vehicular lamp 10 is attached to a vehicle body, the power supply cords 18 C and 18 D are not caught by the lamp and the vehicle body.

Furthermore, instead of forming the single rib 12 g as described in this embodiment, a plurality of ribs 12 i and 12 j may be formed along the annular wall 12 c as shown in FIG. 6 . With these ribs 12 i and 12 j, the same functions and advantages as the above embodiments can be obtained.

Furthermore, although the back cover 16 is attached to the annular wall 12 c by rotating the back cover 16 in the above embodiments, the back cover 16 may be attached to the annular wall 12 c by pushing the cover 16 . The same operations and advantages as the above embodiments can be obtained in this case as well.

Although the present invention has been described by way of exemplary embodiments, it should be understood that many changes and substitutions may be made by those skilled in the art without departing from the spirit and the scope of the present invention which is defined only by the appended claims.