JP2005138815A - Lamp equipped with light-shield - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lamp equipped with a light-shield used as a light source of a headlight capable of solving a problem that the heat reflected from a light-shield film or a light-shield member of a conventional lamp equipped with light-shield is accumulated in a burner part whereby a gas leak etc. is easily generated in the burner part. <P>SOLUTION: The lamp equipped with the light-shield is structured so that a light-shield member is arranged at the periphery of an outer tube 1 having a light emission part 4 with a gap reserved in between and is secured to a lamp base fixed to the outer tube, in such an arrangement that the member is located a certain distance apart from the lamp base in the axial direction. Further the arrangement includes a holder 9 fixed to the lamp base 5 and an arm 10 holding the light-shield installed in the holer. The light-shield has a tab 16 attached to the lamp base, and the lamp base has an engagement part capable of being engaged with lighting fixtures for the outer tube fitted with light-shield and also for an outer tube without the light-shield member, and when the outer tube having light-shield is attached to the lamp base, the tab on the light-shield blocks the engagement part which is engaged with the lighting fixture for the outer tube without light-shield. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a lamp with a light shield, and more particularly to a lamp with a light shield used as a light source for a headlamp.

As a lamp used as a light source of a headlamp, a lamp provided with a light shielding film for preventing glare is known (Patent Document 1). Further, there is also known one using a light shielding plate instead of the light shielding film (Patent Document 2).
Japanese Patent Laid-Open No. 11-232903 Utility Model Registration No. 3090796

  However, when the outer glass tube 1 is provided with the light-shielding film 2 as shown in FIGS. 17 and 18 (Patent Document 1), a boundary line is formed between the outer glass tube 1 and the light-shielding film 2, and light is reflected here. As a result, heat is accumulated in the burner part 3 through the outer glass tube 1, and the burner part 3 is in a severe state, and gas leakage (slow leak) is likely to occur.

  Further, even when the light-shielding film is separated from the lamp (Patent Document 2), they are in close contact with each other and have the same drawbacks. In FIGS. 17 and 18, reference numeral 4 denotes a light emitting portion, 5 denotes a base portion, and 6 denotes an electrode lead wire.

  The present invention eliminates the above-mentioned drawbacks.

  The lamp with a light shielding body of the present invention includes an outer tube having a light emitting portion, a light shielding member disposed on the outer periphery of the outer tube via a gap, and a base portion fixed to the outer tube. The shading member is detachable or fixed to the base part.

  The light shielding member is a cylindrical body having an opening with an opening angle of 115 ° or less.

  Further, the gap is 0.5 mm or more and 1.5 mm or less.

  The heat-shielding paint is applied to the inner surface of the light shielding member, and the heat radiation paint is applied to the outer surface of the light shielding member.

  Further, surface area expanding means is provided on the surface of the light shielding member.

  Further, the light shielding member is separated from the base part by a predetermined distance in the axial direction.

  In the lamp with a light shielding body of the present invention, a holder fixed to the base part and an arm for holding the light shielding member provided on the holder are further formed.

  The base portion of the light shielding member is abutted against the base portion.

  In the vicinity of the base, a slit is formed in the light shielding member.

  The lamp with a light shielding body of the present invention comprises an outer tube having a light emitting portion, a light shielding member disposed on the outer periphery of the outer tube via a gap, and a base portion fixed to the outer tube. Has a hole with a hole for fixing at its lower part, and this ear is detachably fixed to the base part with a screw.

  The ear hole diameter is an inner diameter larger than the outer diameter of the screw.

  The lamp with a light shielding body of the present invention comprises an outer tube having a light emitting portion, a light shielding member disposed on the outer periphery of the outer tube via a gap, and a base portion fixed to the outer tube. Has a fixing ear at its lower part, the ear has a hole or a notch, and at least the upper end of the base part is a meltable resin, and extends into the ear hole or the notch from the base part. A portion is inserted, and the ear is sandwiched and fixed between the enlarged head of the rod-shaped portion and the base portion.

  The lamp with a light shielding body of the present invention comprises an outer tube having a light emitting portion, a base portion fixed to the outer tube, and a light shielding member detachably attached to the base portion, and the base portion is an outer tube with a light shielding member. It has a notch of an engaging portion that can be engaged with a lamp for a tube and an outer tube without a light shielding member, and has a closing means for closing the notch of an engaging portion that can be engaged with a lamp for an outer tube without a light shielding member. To do.

  The closing means for closing the notch of the engaging portion that can be engaged with the lamp for the outer tube without the light shielding member is constituted by an ear formed at a lower portion of the light shielding member.

  According to the lamp with a light shielding body of the present invention, even if the light shielding member is provided, heat is not accumulated in the burner portion, and a brighter and higher color temperature lamp can be obtained.

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

  In the present invention, as shown in FIGS. 1 and 2, a cylindrical light shielding member 7 having an outer diameter of 12 mm or less, for example, is disposed concentrically with the outer glass tube 1 through a gap on the outer periphery of the outer glass tube 1. The light shielding member 7 has a thickness of 0.5 mm, for example, and an opening 8 having an opening angle of 115 ° or less is formed on one side surface thereof. The gap is preferably 1.5 mm or less for preventing blurring of the cut line, and 0.5 mm or more for heat dissipation. In addition, when the lamp having the light shielding member 7 having an opening angle of 115 ° or less is set on the reflector, it is possible to obtain an appropriate light distribution that does not dazzle the oncoming vehicle.

  Further, a cylindrical holder 9 is fitted into the base part 5 and fixed by adhesion, welding, etc., and a base part of a short rail-like arm 10 extending in the axial direction is attached to two or three places on the outer periphery of the holder 9. The light-shielding member 7 is held by the free end 11 of the arm 10, the light-shielding member 7 is separated from the end surface of the base part 5 by a predetermined distance in the axial direction, and at the same time with respect to the reference position of the light emitting part 4 or base part 5 of the lamp. After adjusting and positioning freely in the vertical and horizontal directions, this is fixed to the free end 11 of the arm 10 by welding or the like. According to such positioning, heat convection is promoted and the heat dissipation effect is enhanced.

  In addition, either one or the other of the engaging convex part and the engaging concave part is formed on the light shielding member 7 and the base part 5, respectively, and both are engaged by press-fitting and separated from each other by pulling. Alternatively, the light shielding member 7 may be inserted into the insertion portion formed in the base portion 5 and then rotated to be coupled to each other.

  The light shielding member 7 is preferably formed of a metal having a high specific heat, and it is preferable to apply a heat resistant paint on the inner surface and apply a heat dissipating paint on the outer surface.

  Furthermore, it is preferable that the surface of the light shielding member 7 is provided with fins 12 as shown in FIGS. 3 and 4 or unevenness 13 as shown in FIG. 5 to increase the surface area.

  The base portion 14 of the light shielding member 7 is abutted against the holder 9 as shown in FIG. 6 so that the light shielding member 7 can be temporarily positioned before positioning with respect to the arm 10 of the holder 9. Preferably, a slit 15 is formed in the vicinity of the base portion 14 to improve the heat dissipation effect.

  According to this embodiment, the arm 10 can be omitted, and the convection of heat is promoted by the slit 15. The light shielding member 7 may be directly fixed to the base portion 5 without using the holder 9.

  The light shielding member 7 may be detachable without being fixed to the base portion 5. In this case, the light shielding member 7 can be sold in the same product package as the lamp not having the light shielding member 7, and distribution and production merit can be obtained. It is done.

  As described above, according to the lamp with a light shielding body of the present invention, since a gap of 0.5 mm to 1.5 mm is formed between the inner surface of the light shielding member 7 and the outer surface of the outer glass tube 1, heat is accumulated in the burner portion 3. It will not be done.

  In Embodiment 3 of the present invention, as shown in FIG. 7, a fixing perforated ear 16 is formed in the lower part of the light shielding member 7, and this ear 16 is screwed to the base portion 5 with a screw 17.

  Further, as shown in FIG. 8B, when the hole diameter of the ear 16 is set to an inner diameter larger by about 0.5 mm to 2 mm than the outer diameter of the screw, the position in the direction orthogonal to the axis of the light shielding member 7 with respect to the base 5 can be adjusted. It can cope with variations in dimensions and position. As shown in FIG. 8C, the hole may be a U-shaped notch 18 or the like.

  Further, as shown in FIGS. 8D and 9, if a spacer 19 or a spring 20 is inserted between the ear 16 and the base part 5, the position and inclination of the light shielding body in the axial direction can be adjusted.

  Further, as shown in FIGS. 10 and 11, at least the upper end portion of the base portion 5 is made of a meltable resin without using the screw 17, and the rod-like portion 21 extending integrally from the base portion 5 is formed in the hole of the ear 16. After the insertion, the head of the rod-shaped portion 21 may be melt-collapsed, and the outer diameter larger than the inner diameter of the hole of the ear 16 is interposed between the rod-shaped portion 21 and the base portion 5 as shown in FIG. 12A. An intermediate rod-like portion 23 is provided. The length of the intermediate rod-shaped portion 23 is set longer than the design dimension when the ear 16 is fixed, and after inserting the hole of the ear 16 into the rod-shaped portion 21, the head of the rod-shaped portion 21 is crushed. When the member 29 is melt-collapsed, the intermediate rod-like portion 23 is melt-collapsed to a predetermined size as shown in FIG. 12B, whereby the axial position and inclination of the light shield can be adjusted. In addition, by setting the hole diameter of the ear 16 to an inner diameter that is 0.5 mm to 2 mm larger than the outer diameter of the rod-shaped portion 21, the position in the direction perpendicular to the axis of the light shielding member 7 with respect to the base portion 5 can be adjusted. It is possible to cope with variations in the dimensions and positions of each part. The hole may be a U-shaped notch or the like.

  The rod-shaped portion 21 and the intermediate rod-shaped portion 23 may be made of a plastically deformable material such as soft iron or aluminum alloy, and the enlarged head may be formed and the dimensions of the intermediate rod-shaped portion may be adjusted by normal temperature crushing.

  In Embodiment 4 of the present invention, as shown in FIG. 13, on the outer periphery of the base portion 5, there are engaging portions 24 that can be engaged with lamps (not shown) for an outer tube with a light shielding member and an outer tube without a light shielding member, When the outer glass tube 1 having the light shielding member 7 is attached to the base portion 5 as shown in FIG. 14, the ears of the light shielding member 7 become lamps for the outer glass tube 1 without the light shielding member. The engaging portion 25 to be engaged is closed.

  If it does in this way, it will become possible to prevent beforehand that the nozzle | cap | die part 5 which attached the outer glass tube 1 is integrated in the lamp | ramp which does not match this accidentally.

  The engaging portions 24 and 25 may be, for example, notches or holes 26. As shown in FIG. 15, the notches and holes 26 are closed with a thin plate-like body 27, and the plate-like body 26 is attached as necessary. Instead of the plate-like body 27, a sealing plug-like closing member 28 may be used as shown in FIG.

It is a front view of the lamp | ramp with a light-shielding body of this invention. It is a right view of the lamp | ramp with a light-shielding body shown in FIG. It is a front view of the light-shielding member in the lamp | ramp with a light-shielding body of this invention. FIG. 4 is a right side view of the light shielding member shown in FIG. 3. It is a front view of the light-shielding member in the other Example of the lamp | ramp with a light-shielding body of this invention. It is a front view which shows the other Example of the lamp | ramp with a light-shielding body of this invention. It is a front view which shows other Example of this invention. It is a top view of the lamp | ramp with a light shielding body shown in FIG. It is explanatory drawing of the modification of a perforated ear. It is explanatory drawing of the other modification of a perforated ear. FIG. 8 is an enlarged cross-sectional view of a part of the lamp with a light shield shown in FIG. 7. It is an expanded sectional view of the example which used the spring instead of the spacer of FIG. 8D. It is explanatory drawing of the other example of FIG. It is explanatory drawing of the other example of FIG. It is explanatory drawing of the other example of FIG. It is explanatory drawing of the other example of FIG. It is a top view of other Example of the lamp | ramp with a light-shielding body of this invention. It is explanatory drawing of the Example of FIG. It is explanatory drawing of an example of the engaging part shown in FIG. It is explanatory drawing of the other example of the engaging part shown in FIG. It is a front view of the lamp | ramp with the conventional light-shielding body. It is explanatory drawing of the lamp | ramp with a light-shielding body shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer glass tube 2 Light-shielding film 3 Burner part 4 Light emission part 5 Base part 6 Electrode lead wire 7 Light-shielding member 8 Opening 9 Holder 10 Arm 11 Free end 12 Fin 13 Concavity and convexity 14 Base part 15 Slit 16 Ear 17 Screw 18 Hole 19 Spacer 20 Spring 21 Bar-shaped part 22 Expanded head 23 Intermediate bar-shaped part 24 Engaging part 25 Engaging part 26 Hole 27 Plate-shaped body 28 Closing member 29 Crushing member

Claims (16)

  A lamp with a light-shielding body, comprising: an outer tube having a light-emitting portion; a light-shielding member disposed on the outer periphery of the outer tube via a gap; and a base portion fixed to the outer tube.   The lamp with a light-shielding body according to claim 1, wherein the light-shielding member is detachably attached to the base.   The lamp with a light-shielding body according to claim 1, wherein the light-shielding member is fixed to the base portion.   4. The lamp with a light shielding body according to claim 1, wherein the light shielding member is spaced apart from the base portion by a predetermined distance in the axial direction.   5. The lamp with a light shielding body according to claim 1, further comprising a holder fixed to the base portion and an arm for holding the light shielding member provided on the holder.   6. The light-shielding body-equipped lamp according to claim 1, wherein a base portion of the light-shielding member is abutted against the base portion.   The lamp with a light shielding member according to claim 1, wherein a slit is formed in the light shielding member in the vicinity of the base.   An outer tube having a light emitting portion, a light shielding member disposed on the outer periphery of the outer tube via a gap, and a base portion fixed to the outer tube, and the light shielding member has a fixing ear at a lower portion thereof. A lamp with a light-shielding body having fixing means for fixing the ear to the base part.   An outer tube having a light emitting portion, a light shielding member disposed on the outer periphery of the outer tube via a gap, and a base portion fixed to the outer tube, and the light shielding member has a fixing ear at a lower portion thereof. The ear has a hole or a notch, and at least the upper end of the base part is a meltable resin, and a bar-like part extending from the base part is inserted into the hole or notch of the ear, A lamp with a light shield, wherein the ear is sandwiched and fixed between an enlarged head and the base.   An outer tube having a light emitting portion, a base portion fixed to the outer tube, and a light-shielding member detachably attached to the base portion. The base portion is used for a lamp for an outer tube with a light-shielding member and an outer tube without a light-shielding member, respectively. A lamp with a light-shielding body having a notch of an engaging portion that can be engaged and a closing means for closing the notch of the engaging portion that can be engaged with a lamp for an outer tube without a light-shielding member.   11. The light-shielding body according to claim 10, wherein the closing means for closing the notch of the engaging portion engageable with the lamp for the outer tube without the light-shielding member is constituted by an ear formed at a lower portion of the light-shielding member. With lamp.   The light-shielding member according to claim 1, wherein the light-shielding member is a cylindrical body having an opening with an opening angle of 115 ° or less. With lamp.   The lamp with a light-shielding body according to claim 1, wherein the gap is 0.5 mm or more and 1.5 mm or less.   14. With light-shielding body according to claim 1, wherein a heat-resistant paint is applied to the inner surface of the light-shielding member. lamp.   15. The light shielding material according to claim 1, wherein a heat radiation paint is applied to an outer surface of the light shielding member. Body lamp.   A surface area enlarging means is provided on the surface of the light shielding member, characterized in that: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 or 15 The lamp with the light-shielding body described.

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