JP5060987B2 - Lighting unit - Google Patents

Description

  The present invention relates to a lighting unit mainly used in a vehicle interior lighting device.

  FIG. 5 is an external perspective view of a conventional lighting unit described in Non-Patent Document 1, FIG. 6 is a perspective view showing an internal configuration of the lighting unit, and FIGS. 7A and 7B are LEDs provided as lamps. FIG. 8 is an explanatory view of the support means on the housing side for preventing wobble, and FIG. 8 is an explanatory view of the support means on the cover side for preventing the wobble.

  As shown in FIG. 5, this lighting unit has a lower housing 110 and an upper cover 120 that constitute an exterior case, and an internal space formed when the housing 110 and the cover 120 are combined, It accommodates parts such as the bus bar 19 and the LED 30 (lamp) shown in FIG.

  A press contact terminal 14 is provided at each end portion of the two bus bars 19 fixed to the housing 110, and two leads 31 of the LED 30 are connected to the press contact terminal 14 by press contact. The main body portion 30A of the LED 30 is a cylindrical portion in which the light emitting portion is molded with a transparent resin, and is supported by the press contact terminal 14 via these two leads 31, thereby the tip hemispherical lens portion of the cover 120 is covered. It faces the window 23.

  The pressure contact terminal 14 protrudes forward from the front end of the bus bar 19, and slides the two leads 31 extending in parallel downward downward from the front to the rear with the main body 30 </ b> A of the LED 30 facing upward. By doing so, the lead 31 is press-fitted into the slit.

  The LED 30 is basically supported by press-contacting the two leads 31 to the press contact terminal 14, but it is easy to wobble when an external force is applied by itself. Therefore, as shown in FIG. 7, the housing 110 is provided with two tilt stoppers 13 and 13 ′ for suppressing the wobbling of the LED 30. The first tilt stop 13 is disposed below the press contact terminal 14, and the second tilt stop 13 ′ is disposed on the side of the LED main body 30 </ b> A above the press contact terminal 14. The LED 30 is restricted from falling in the front-rear direction by the presence of these tilting stoppers 13 and 13 '.

  For example, when the LED 30 is about to fall in the direction of arrow A in FIG. 7A, the second fall stop 13 'supports the LED main body 30A, thereby restricting the LED 30 from falling in that direction. Further, when the LED 30 is about to fall in the direction of arrow B in FIG. 7B, the first fall stop 13 supports the LED lead 31, thereby restricting the LED 30 from falling in that direction.

Further, as shown in FIG. 8, a positioning arm 126 for restricting the movement of the LED 30 is provided inside the cover 120 to be united with the housing 110. The cover 120 includes a top wall 21 and both side walls 22 depending from the left and right side edges of the top wall 21, and the two positioning members are positioned from the base end of the window portion 23 provided on the top wall 21. The arm 126 is extended downward. Then, when the cover 120 is combined with the housing 110, the wobbling of the LED 30 is regulated by the positioning arms 126 positioned on the side of the main body 30A of the LED 30.
Japan Society of Invention and Innovation Technical Bulletin No. 2006-500394

  As described above, in the conventional lighting unit described in Non-Patent Document 1, the housing 110 and the cover 120 are provided with the anti-falling devices 13 and 13 ′ for restricting the LED 30 from falling and the positioning arm 126, so that the LED 30 can vibrate. It is intended to regulate the wobble caused by impact. However, if the positioning arm 126 is provided on the cover 120, or if the housing 110 is provided with the tilt stoppers 13 and 13 ', the wobbling in the front / rear and right / left directions cannot be completely suppressed, and as a result, the LED 30 may not light properly. was there.

  In view of the above circumstances, an object of the present invention is to provide an illumination unit that can reliably prevent wobbling of a lamp mounted on a housing, eliminate defective lighting of the lamp, and thereby improve reliability. .

  The lighting unit according to the first aspect of the present invention protects the lamp by being combined with the housing having a lamp having a lead projecting to the outside, a housing having a terminal for connecting the lead of the lamp, and the housing. In the lighting unit comprising a cover, a lamp support arm that is positioned with a gap on both sides of the lamp is erected on the housing, and when the cover is united with the housing, A pressing wall is provided to bend the lamp support arm and press it against the outer surface of the lamp.

  The invention of claim 2 is the illumination unit according to claim 1, wherein the lamp is an LED having the two leads parallel to each other, and the terminal is two bus bars mounted on the housing. Each of the pressure contact terminals arranged side by side on the housing, a pair of the lamp support arms are arranged so as to be located on both sides of the main body of the LED, and the pressing wall is When the cover is combined with the housing, the cover is disposed at a position covering the outer surface of the lamp support arm.

  A third aspect of the present invention is the illumination unit according to the first or second aspect, wherein the lamp support arm and the pressing wall have sliding portions that slide relative to each other when the cover is combined with the housing. One of the sliding portions is formed of a guide slope that presses and deforms the lamp support arm toward the lamp as the cover is united with the housing.

  A fourth aspect of the present invention is the illumination unit according to any one of the first to third aspects, wherein the lamp support arms are arranged in a pair on both the left and right sides of the lamp, Position restriction walls are provided at both ends of the inner surface in the front-rear direction to restrict the position of the lamp in the front-rear direction when the inner surface of the lamp support arm is pressed against the outer surface of the lamp.

  According to the first aspect of the present invention, the lamp support arm is provided on the housing and the cover is provided with a pressing wall. Before the cover is united with the housing, the lamp support arm is positioned with a gap from the lamp, The lamp support arm is bent by the pressure wall and pressed against the outer surface of the lamp when united with the housing, so the lamp can be mounted without being disturbed by the lamp support arm when the lamp is connected to the terminal. Work can be done. Further, when the cover is united with the housing after the lamp is mounted, the lamp support arm presses and supports the lamp from both sides, so that the lamp wobble can be reliably stopped. Therefore, the lamp support can be strengthened without deteriorating the lamp mounting workability, and the connection reliability between the lamp and the terminal can be improved. Further, since the lamp support arms located on both sides of the lamp can be used for positioning when the lamp is inserted into the housing, it is possible to contribute to the improvement of assembling workability. Further, when the lamp support arm is pressed against the outer surface of the lamp, an extra gap around the lamp can be hidden, so that the structure inside can be prevented from being seen through the gap.

  According to the invention of claim 2, since the LED is used as the lamp and the two leads of the LED are pressed against the press contact terminal on the bus bar arranged in the housing, the structure can be simplified while suppressing the cost. In addition, the lamp can be easily mounted. Further, since the pressing wall of the cover is provided so as to cover the outer surface of the lamp support arm when the cover is united with the housing, the lamp supporting arm is bent to be tightened from the outside by the pressing wall. Can be pressed against the outside surface. In addition, when the cover is united with the housing, the LED lamps are pressed against both sides with a pair of lamp support arms arranged opposite to the housing, so that wobble can be reliably prevented even with considerable impact. However, the lamp can be stably supported.

  According to the invention of claim 3, since at least one of the ramp support arm and the sliding surface of the pressing wall is constituted by a guide slope, the lamp support arm is gradually bent as the cover is united with the housing, The lamp can be pressed and supported. Therefore, excessive assembly can be eliminated. Further, even when the position of the lamp is slightly deviated from the lamp support arm, it is possible to gradually correct the attitude of the lamp and finally hold the lamp in an appropriate position at an appropriate position.

  According to the fourth aspect of the present invention, the position restricting wall for restricting the position of the lamp in the front-rear direction is provided on the inner side surfaces of the pair of left and right lamp support arms. The position can be restricted to the left and right, and the fixing force of the lamp can be increased.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 is an exploded cross-sectional view as seen from the front side of the lighting unit of the embodiment, FIG. 2 is a configuration diagram of a portion where the LED is mounted on the housing of the lighting unit, FIG. (B) is a side sectional view showing the state after mounting, FIG. 3 is a sectional view seen from the front showing a state in which the cover of the illumination unit is united with the housing, and FIG. 4 shows the cover of the illumination unit in the housing. It is sectional drawing seen from the front which shows the state united completely. The configuration shown in FIGS. 5 and 6 of the illumination unit of the present embodiment and the conventional illumination unit described above is not changed at all, and will be described with reference to those drawings.

  As shown in FIGS. 1 to 6, the lighting unit according to the present embodiment includes a lower housing 10 that constitutes an exterior case, a cover 20 that is combined with the upper side of the housing 10, and an LED 30 that is accommodated inside the exterior case. (Lamp), bus bar 19, and other components (resistor, diode, etc.).

  A press contact terminal 14 is provided at each end portion of the two bus bars 19 fixed to the housing 10, and two leads 31 of the LED 30 are attached to the press contact terminals 14 arranged side by side on the housing 10. Are connected by pressure welding. The main body portion 30A of the LED 30 is a cylindrical portion in which a light emitting portion is molded with a transparent resin, and is supported by the press contact terminal 14 through the two leads 31 so that the hemispherical lens portion at the tip of the cover 20 It faces the window 23.

  The pressure contact terminal 14 protrudes forward from the front end of the bus bar 19, and the two leads 31 extending in parallel downward are arranged in a posture with the main body portion 30 </ b> A of the LED 30 facing upward, from front to rear. By sliding, the lead 31 is press-fitted into the slit of the press contact terminal 14.

  In addition, as shown in FIG. 2, the housing 10 is provided with two anti-falling devices 13 and 13 ′ for suppressing the wobbling of the LED 30. The first tilt stopper 13 is disposed below the press contact terminal 14, and the second tilt stop 13 ′ is disposed on the side of the LED main body 30 </ b> A above the press contact terminal 14, and the tilt stoppers 13, 13 ′. Thus, the LED 30 is prevented from falling in the front-rear direction.

  The above configuration is almost the same as the conventional example described above. Next, differences between the illumination unit of this embodiment and the illumination unit of the conventional example will be described.

  In the lighting unit according to the present embodiment, as shown in FIG. 1, a pair of left and right lamp support arms 15, 15 positioned on the housing 10 with a gap on both sides of the LED 30 are opposed to each other with the LED 30 interposed therebetween. Is erected. These lamp support arms 15 are arranged on the inner side of the side wall 12 of the housing 10, and the free ends extend upward with the base end 15 a fixed to the bottom wall 11 of the housing 10.

  On the other hand, as shown in FIGS. 3 and 4, when the cover 20 is combined with the housing 10, the cover 20 has a pressing wall 25 that bends the lamp support arm 15 and presses it against the outer surface of the main body 30 </ b> A of the LED 30. Is provided. The pressing wall 25 extends downward from the vicinity of the base end of the window portion 23 of the top wall 21 of the cover 20, and covers the outer surface of the lamp support arm 15 when the cover 20 is combined with the housing 10. Is arranged.

  The side wall 12 of the housing 10 fits inside the side wall 22 of the cover 20 when the cover 20 is combined with the housing 10, and the pressing wall 25 is in a state where the cover 20 is combined with the housing 10. The inner wall of the housing 10 does not interfere with the side wall 12.

  Further, a sliding surface (sliding portion) that slides when the cover 20 is combined with the housing 10 is provided on the outer surface of the front end of the lamp support arm 15 and the inner surface of the pressing wall 25. The surface is constituted by guide slopes 16 and 26 that press and deform the lamp support arm 15 toward the LED 30 as the cover 20 is united with the housing 10.

  Although not shown, the front and rear positions of the LEDs 30 are positioned at both ends in the front and rear direction of the inner surface of each lamp support arm 15 when the inner surface of the lamp support arm 15 is pressed against the outer surface of the main body 30A of the LED 30. A position restriction wall for restriction is provided. The position regulating wall may be provided as a rib on the inner side surface of the lamp support arm 15, or the inner side surface of the lamp support arm 15 is configured by a curved surface corresponding to the curvature of the outer peripheral surface of the main body 30 </ b> A of the LED 30. Further, it may be constituted by portions on both end sides in the bending direction.

  When the lighting unit is assembled, first, the LED 30 is mounted on the housing 10 on which the bus bar 19 is mounted in advance as shown in FIG. The LED 30 is mounted by directing the main body 30 </ b> A upward and pressing the two leads 31 into the slits of the press contact terminals 14 from the front of the housing 10.

  At this stage, since the lamp support arm 15 is located at a position spaced from the LED 30, the LED 30 can be pressed against the press contact terminal 14 without being obstructed by the lamp support arm 15. Therefore, the mounting property of the LED 30 is not deteriorated.

  In addition, since the lamp support arm 15 is located on both sides of the mounting position of the LED 30, the LED 30 can be mounted on the housing 10 while using the lamp supporting arm 15 as a guide, and the mounting of the LED 30 is facilitated.

  After the LED 30 and other parts are mounted on the housing 10 side, the housing 10 is covered with a cover 20 from above to protect the LED 30 and the like. At this time, when the cover 10 is put on the housing 10 from above, as shown in FIG. 3, the pressing wall 25 provided on the inner surface of the cover 20 is put on the outside of the lamp support arm 15 erected on the housing 10. Match.

  Then, the guide slope 16 on the outer end of the lamp support arm 15 and the guide slope 26 on the inner end of the pressing wall 25 slide, whereby the lamp support arm 15 is gradually bent inward, and finally the cover 20 is moved into the housing. 4, as shown in FIG. 4, the lamp support arm 15 presses and contacts the outer peripheral surface of the main body 30 </ b> A of the LED 30 from both sides.

  Therefore, when the lamp support arm 15 is pressed and brought into contact with the main body 30A so as to be tightened from the outside, the LED 30 is securely held so as not to wobble. Therefore, it is possible to stably support the LED 30 without undue assembly, to eliminate contact failure between the lead 31 and the press contact terminal 14, and to improve the connection reliability between the LED 30 and the press contact terminal 14. Even if the position of the LED 30 is slightly deviated with respect to the lamp support arm 15, the lamp support arm 15 is gradually tightened inward, so that the posture of the LED 30 is corrected and finally the proper position is obtained. It is possible to hold the LED 30 in an appropriate posture.

  In addition, when the lamp support arm 15 is pressed against the outer surface of the main body portion 30A of the LED 30, it is possible to hide an extra gap around the LED 30, and thus it is possible to prevent the inside structure from being seen through the gap.

  In addition, since the LED 30 is used as a lamp and the two leads 31 of the LED 30 are pressed against the press contact terminal 14 on the bus bar 19 disposed in the housing 10, the structure can be simplified while suppressing the cost. The lamp can be easily mounted.

  Moreover, since the position control wall which controls the position of the front-back direction of LED30 is provided in the inner surface of a pair of right and left lamp support arms 15 and 15, LED30 is made only by providing a pair of lamp support arms 15 and 15. The position can be restricted not only in the left-right direction but also in the front-rear direction, and the fixing force of the LED 30 can be increased.

  In addition, although the case where LED30 was used as a lamp | ramp was described in the said embodiment, lamps other than LED can also be used.

  Moreover, although the case where the guide slopes 16 and 26 are provided on both the lamp support arm 15 and the pressing wall 25 is shown in the above embodiment, an effect similar to that obtained when only one of the guide slopes is provided can be obtained. Can do.

It is the exploded sectional view seen from the front side of the lighting unit of the embodiment of the present invention. It is a block diagram of the part which mounts LED in the housing of the illumination unit, (a) is a state before mounting, (b) is a sectional side view showing the state after mounting. It is sectional drawing seen from the front which shows the state in the middle of uniting the cover of the illumination unit with a housing. It is sectional drawing seen from the front which shows the state which united the cover of the illumination unit with the housing completely. It is an external appearance perspective view of the conventional illumination unit described in the nonpatent literature 1. It is a perspective view which shows the internal structure of the illumination unit. (A), (b) is explanatory drawing of the support means by the side of the housing which prevents wobbling of LED provided as a lamp | ramp in the conventional illumination unit. It is explanatory drawing of the support means by the side of the cover which prevents the wobble.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Housing 14 Pressure contact terminal 15 Lamp support arm 16 Guide slope (sliding part)
19 Busbar 20 Cover 25 Pressing Wall 26 Guide Slope (Sliding Part)
30 LED (lamp)
31 leads

Claims (4)

In an illumination unit comprising: a lamp having a lead projecting outside; a housing equipped with a terminal for connecting the lead of the lamp; and a cover that protects the lamp by being combined with the housing.
A lamp support arm is provided on the housing so as to have a gap on both sides of the lamp. When the cover is united with the housing, the lamp support arm is bent and the lamp support arm is bent. An illumination unit comprising a pressing wall that is pressed against an outer surface. The lighting unit according to claim 1,
The lamp is an LED having two leads parallel to each other, and the terminals are formed on two bus bars mounted on the housing, respectively, so that two press contact terminals arranged side by side on the housing A pair of the lamp support arms are arranged so as to be located on both sides of the main body of the LED, and the pressing wall is formed when the cover is united with the housing. An illumination unit, which is disposed at a position covering the outer surface. The lighting unit according to claim 1 or 2,
The lamp support arm and the pressing wall are provided with sliding portions that slide relative to each other when the cover is combined with the housing, and either one of the sliding portions combines the cover with the housing. An illumination unit comprising a guide slope that press-deforms the lamp support arm toward the lamp as the lamp is moved. The lighting unit according to any one of claims 1 to 3,
A pair of the lamp support arms are arranged on both the left and right sides of the lamp, and when the inner side surface of the lamp support arm is pressed against the outer side surface of the lamp at both ends in the front-rear direction of the inner side surface of each lamp support arm. A lighting unit characterized in that a position regulating wall for regulating the position of the lamp in the front-rear direction is provided.

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