JP5695969B2 - Automotive lamp - Google Patents

Description

The present invention relates to an automotive lamp in which a light distribution control light-shielding member is detachably mounted around an outer tube of the lamp, and in particular, the light-shielding member can be easily attached and detached and erroneously attached to a lamp to which the lamp is mounted. The present invention relates to an automotive lamp improved so as to be surely prevented with a simple configuration.

In an automobile lamp, it is well known that a light blocking member for controlling light distribution is attached to the lamp itself. For example, in US Pat. No. 1,446,925, a light distribution control light-shielding member consisting of a shell covering the upper half of the lamp and a disk covering the front of the lamp is directly applied to the bulb of the incandescent bulb with a coil spring. A structure to be attached to is disclosed. Since the incandescent lamp has a relatively low tube temperature at the time of lighting, the light shielding member can be directly attached to the tube in this way.

However, when the automotive lamp is a discharge lamp, particularly a high-pressure discharge lamp such as a metal halide lamp, the temperature of the outer tube including the light emitting part becomes extremely high when the lamp is lit. There arises a problem that not only the light shielding member is thermally deteriorated at an early stage, but also the temperature distribution of the outer tube becomes non-uniform and the lamp characteristics are deteriorated.

For this reason, Japanese Patent Laid-Open No. 2005-138815 proposes a structure in which a substantially cylindrical light shielding member 12 is detachably mounted around the outer tube 11 via a gap 13 as shown in FIGS. It was done. In FIG. 1 or FIG. 2, 14 is a base part fixed to the outer tube, and 15 is a flange part formed on the upper peripheral edge of the base part 14. In such a structure, since the gap 13 exists between the outer tube 11 and the light shielding member 12, it is possible to prevent the thermal degradation of the light shielding member 12 and the adverse effect on the lamp characteristics. Further, when it is desired to change the light distribution characteristics in the same lamp, the light shielding member 12 can be replaced or removed. 3 and 4 are plan views of the light shielding member 12, and mounting legs 16, 17, 18 for screwing the light shielding member 12 to the upper surface of the base portion 14 around the lower end of the light shielding member 12. Is provided.

Moreover, as shown in FIGS. 2 and 5, the above-mentioned Japanese Patent Application Laid-Open No. 2005-138815 discloses a lamp lamp having an outer tube with a light-shielding member on a base part 14, particularly a flange part 15 formed on the upper peripheral edge thereof. An engaging notch 19 that can be engaged with the lamp and an engaging notch 20 that can be engaged with a lamp for a lamp having an outer tube without a light blocking member are formed. These engagement notches 19 and 20 may be formed by removing the thin portion 21 formed in a part of the flange portion 15 as shown in FIG. 6, as shown in FIG. Two engaging cutout portions 19 and 20 may be formed in the flange portion 15 in advance, and one of them may be closed with a filler 22 as necessary. In any case, as will be described later, it is necessary to use means for preventing a lamp having an outer tube with a light shielding member from being erroneously mounted on a lamp for a lamp having an outer tube without a light shielding member.

FIG. 8 shows that when the light shielding member 12 is mounted on the upper surface of the base part 14, an outer pipe without a light shielding member is provided among the engagement notches 19 and 20 of the flange part 15 formed on the upper peripheral edge of the base part 14. The engagement notch 20 that can be engaged with the lamp for the lamp is covered with the filler 22.

FIG. 9 shows that when the light shielding member 12 is mounted on the upper surface of the base part 14, an outer tube without a light shielding member is provided among the engagement notches 19 and 20 of the flange part 15 formed on the upper peripheral edge of the base part 14. The engagement notch 20 that can be engaged with the lamp for the lamp is shown closed with an ear 23 attached to the lower end of the light shielding member 12.

However, in the structure shown in FIG. 8, when mounting the light shielding member 12 on the upper surface of the base part 14, screw holes or screw grooves of a plurality of mounting legs 16, 17, 18 are provided on the upper surface of the base part 14. Since it is necessary to fix the screw holes in accordance with the screw holes, that is, after the screw holes are aligned, not only the assembly is troublesome, but also the engagement notch portion 20 of the flange portion 15 is closed with the filler material 22. There is a disadvantage that it takes time to inject and solidify 22.

In the structure shown in FIGS. 9 and 10, not only the screw alignment work and screwing work of the light shielding member 12 are troublesome, but also the ear 23 is welded to the lower end portion of the light shielding member 12 as in the structure of FIG. Therefore, there is a problem that the material cost is increased and it takes time to assemble.

US Pat. No. 1,446,925 JP 2005-138815 A

It is an object of the present invention to provide an automotive lamp capable of easily attaching and detaching a light shielding member to and from the periphery of an outer tube and reliably preventing erroneous attachment to a lamp mounting the lamp with a simple configuration. To do.

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 having a light-shielding member-equipped outer tube; At least one of a plurality of mounting legs for mounting the light-shielding member on the base portion, each of which has an engaging notch portion that can be engaged with a lamp for a lamp having an outer tube without a light-shielding member. One tip portion forms a closing means for closing an engagement notch that can be engaged with a lamp for a lamp having an outer tube without a light shielding member. Further, at least one of the intervals between the plurality of mounting legs for mounting the light shielding member (the circumferential distance of the light shielding member) is different from the interval between the other mounting legs. In addition, an engagement notch that forms a guide portion, for example, a guide groove, with respect to the mounting leg portion and its distal end portion from the upper surface of the base portion to the flange portion, and closes the distal end portion of the guide groove with the distal end portion of the mounting leg portion. The part is formed.

According to the above-described structure, each mounting leg is configured such that the engagement notch that can be engaged with the lamp for the lamp having the outer tube without the light shielding member is closed at one tip of the mounting leg portion of the light shielding member. Since the screw hole or the screw groove of the portion can be matched with the screw hole provided on the upper surface of the base portion, the screw hole aligning operation and the screw fixing operation are extremely simplified. Furthermore, the mounting leg portion of the light shielding member and the tip end portion thereof fit the guide portion only at a specific position with respect to the upper surface of the base portion and the flange portion. Become.

The side view of the conventional automotive lamp which attached the light-shielding member around the outer tube | pipe. The principal part top view of the lamp | ramp for motor vehicles of FIG. The top view of the conventional light-shielding member provided with several mounting legs. The top view of another conventional light-shielding member provided with several mounting legs. The top view of the conventional automotive lamp which formed the notch part for engagement with a lamp in the flange part. The expanded sectional view of the notch part for engagement in FIG. The expanded sectional view of another notch for engagement in Drawing 5. The perspective view which shows the assembly state of the nozzle | cap | die part and the light-shielding member in the conventional lamp | ramp for motor vehicles. The top view of the conventional automotive lamp which shows the state which closed the notch part for engagement with the ear | edge part attached to the light-shielding member. The perspective view which shows the structure of FIG. In the automotive lamp according to the present invention, a perspective view of a cap portion and a light shielding member showing a state before assembly. The perspective view of the nozzle | cap | die part and light-shielding member which show the state after an assembly in the lamp | ramp for motor vehicles which concerns on this invention. The perspective view of the nozzle | cap | die part and light-shielding member which show the state before an assembly in another type of lamp | ramp for motor vehicles based on this invention. The perspective view of the nozzle | cap | die part and the light-shielding member which show the state after an assembly in the lamp | ramp for another type of motor vehicle which concerns on this invention.

A lamp for an automobile having an outer tube having a light emitting portion, a base portion fixed to the outer tube, and a light shielding member that is detachable from the base portion, wherein the base portion includes an outer tube with a light shielding member. And a plurality of mounting legs for mounting the light shielding member on the base portion, each having an engaging notch that can be engaged with a lamp for a lamp having a lamp for lighting and an outer tube without a light shielding member. The engagement notch that can be engaged with the lamp for the lamp having the outer tube without the light-shielding member is closed by at least one of the tip portions.

11 is a perspective view of the base part 31 and the light shielding member 33 showing a state before assembly, and FIG. 12 is a perspective view of the base part 31 and the light shielding member 33 showing a state after assembly. At the periphery of the lower end of the light shielding member 33, mounting legs 34, 35, and 36 for mounting the light shielding member 33 on the upper surface of the base 31 are formed. 35E, 36E and screw holes 34S, 35S, 36S are formed. Also, at least one of the intervals between the mounting legs 34, 35, 36 in the circumferential direction is formed differently from the interval between the other mounting legs. For example, if the virtual lines in the direction in which the mounting legs extend in FIG. 11 are 34X, 35X, and 36X, respectively, the angle between the virtual line 34X and the virtual line 35X, the virtual line 35X, and the virtual line 36X Even if the angle between them is the same, the angle between the virtual line 36X and the virtual line 34X is formed to be different from the two angles.

Further, screw holes 34H, 35H, 36H are provided on the upper surface of the base part 31 corresponding to the screw holes 34S, 35S, 36S of the mounting leg part of the light shielding member 33, and the mounting leg is further provided. A rising portion 37 is formed to form guide portions for the portions 34, 35, and 36. The rising portion 37 has notches 34C, 35C, 36C having widths that can fit the mounting legs 34, 35, 36 corresponding to the positions of the mounting legs 34, 35, 36. In addition, grooves 34G, 35G, and 36G are provided so as to be able to fit the tip portions 34E, 35E, and 36E of the mounting leg portions 34, 35, and 36 in the flange portion 32 so as to be connected thereto. Further, the flange portion 32 can be engaged with an engaging notch 38 that can be engaged with a lamp for a lamp having an outer tube without a light-shielding member, and can be engaged with a lamp for a lamp having an outer tube with a light-shielding member. An engagement notch 39 is provided.

When the lower part of the light shielding member 33 as described above is pressed against the upper surface of the base part 31 having the above-described configuration and the light shielding member 33 is rotated clockwise or counterclockwise, the mounting leg of the light shielding member 33 is positioned at an appropriate position. The portions 34, 35, 36 and their tip portions 34E, 35E, 36E are fitted into the notches 34C, 35C, 36C and the grooves 34G, 35G, 36G, and screw holes 34S, 35S, 36S of the mounting legs. And the screw holes 34H, 35H, 36H of the base part 31 coincide with each other, and at the same time, an engagement notch 38 that can be engaged with a lamp for a lamp having an outer tube without a light-shielding member is formed by the tip 36E of the mounting leg 36. It is blocked.

FIG. 12 shows a state in which the light shielding member 33 is combined on the upper surface of the base 31 as described above, and only screws are screwed into the screw holes 34S, 35S, 36S of the mounting legs 34, 35, 36. The assembly is finished. Reference numeral 40 denotes an outer tube having a light emitting portion by a broken line. Thus, the engagement notches 38 and 39 are formed in the flange portion 32 of the base 31 at intervals of 90 degrees or less with respect to the central axis of the base 31, and the engagement notch 38 is used. The automotive lamp provided with the outer tube without the light shielding member to be engaged with the lamp is referred to as a D2S type in the standard, and the automotive lamp provided with the outer tube with the light shielding member to be engaged with the lamp using the engagement notch portion 39. It is called D2R type.

13 is a perspective view of the base part 31 and the light shielding member 33 showing a state before assembly, and FIG. 14 is a perspective view of the base part 31 and the light shielding member 33 showing a state after assembly. In these drawings, the difference from FIGS. 11 and 12 is that the flange portion 32 of the base portion 31 has an engagement notch portion 38 that can be engaged with a lamp lamp having an outer tube without a light shielding member, and a light shielding member. An engagement notch 39 that can be engaged with a lamp for a lamp having an outer tube is formed at an interval of 180 degrees with respect to the central axis of the base 31, and the engagement notch 38 is mounted. The point is that the leg portion 35 is closed by the distal end portion 35E. As described above, the engagement notches 38 and 39 are formed at an interval of 180 degrees with respect to the central axis of the base 31 and the outer periphery without the light shielding member is engaged with the lamp using the engagement notch 38. An automotive lamp provided with a tube is referred to as a D4S type in terms of standards, and an automotive lamp provided with an outer tube with a light-shielding member that is engaged with a lamp using the engagement notch 39 is referred to as a D4R type. 11, 12, 13, and 14 show that the light shielding member 33 having the same configuration can be shared by the D2R type and D4R type automobile lamps.

Various types of automotive lamps can be obtained by changing the distance between the mounting leg portions of the light shielding member and the position of the engaging notch portion of the base flange portion in the automotive lamp type in which the light shielding member is mounted on the upper surface of the base portion. Applicable.

31: base part 32: flange part 33: light shielding member 34, 35, 36: mounting leg part 34E, 35E, 36E: tip part 34S, 35S, 36S: screw hole 38, 39: notch part for engagement 40: outer tube

Claims (8)

An outer tube having a light emitting part;
A base fixed to the outer tube,
It consists of a shading member that is detachable from the base part,
The base part has an engagement notch that can be engaged with a lamp for a lamp having an outer tube with a light shielding member and a lamp for a lamp having an outer tube without a light shielding member,
An engagement notch in which at least one of the plurality of mounting legs for mounting the light shielding member on the base portion can be engaged with a lamp lamp having an outer tube without a light shielding member. An automotive lamp characterized by forming a closing means for closing the part. 2. The automobile according to claim 1, wherein the base part is formed with a plurality of mounting leg parts of the light shielding member and a guide part for guiding and attaching the front end part to a predetermined position. 3. Lamp. At least one end of the plurality of guide portions formed in the base portion is formed with an engagement notch portion that can be engaged with a lamp for a lamp having a non-light-shielding outer tube. The automobile lamp according to claim 2, wherein the lamp is an automobile lamp. The plurality of mounting legs for mounting the light shielding member are formed at unequal angular intervals with respect to 360 degrees around the light shielding member. The automotive lamp described in 1. A fixing portion for mounting the light shielding member is formed on the upper surface of the base portion, and a flange portion is formed on the upper peripheral edge of the base portion, and the flange portion is provided with a light shielding member. 5. An engaging notch portion is formed, which is capable of engaging with a lamp for a lamp having an outer tube and a lamp for a lamp having an outer tube without a light shielding member, respectively. The automotive lamp according to any one of the above. 6. The automotive lamp according to claim 5, wherein the guide portion is formed continuously from the fixing portion of the mounting leg portion of the light shielding member to the flange portion. The lamp having an outer tube with a light shielding member is a D2R type lamp or a D4R type lamp, and the lamp having an outer tube without a light shielding member is a D2S type lamp or a D4S type lamp. Item 7. A vehicle lamp according to any one of Items 6 to 7. At least two mounting legs of the light-shielding member and their tips are formed at an angular interval that can be shared by the closing means for closing the engaging notch of the D2S type lamp or D4S type lamp provided with the outer tube without the light-shielding member. The automobile lamp according to claim 7, wherein the lamp is used.

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