JPH0411282Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to a projector-type lamp in which a bulb is arranged transversely to the optical axis of a reflector.
In particular, the present invention relates to a project-type lamp that allows the bulb to be placed in a predetermined position with high precision and that allows the reflector to be prevented from being deformed.

[Conventional technology]

A conventional project-type lamp will be explained with reference to FIG. 10.

In the figure, 1 is a reflector. This reflector 1 has an opening in the front and a reflecting surface 10 in the form of an ellipsoid of revolution on the front side. At the rear portion of the reflector 1 through which the optical axis Z-Z passes, a mounting hole 11 is provided perpendicularly to the optical axis Z-Z.

2 is a valve holder. This valve holder 2
has a hollow cylindrical shape with one end closed and the other end open, a through hole 20 is provided at the closed end, and a small protrusion 21 is provided at the edge of the through hole 20 at the closed end,
On the other hand, a locking hole 22 is provided at the edge of the opening end. This valve holder 2 is fixed to the mounting hole 11 of the reflector 1 by caulking.

3 is a mounting spring. One end of this mounting spring 3 is rotatably attached to the valve holder 2.

4 is a bulb as a light source. This valve 4
, a glass tube 40 containing a filament (not shown), a base 41 provided at the rear of the glass tube 40, a terminal 42 protruding rearward from the base 41, and a base 41 of the base 41. It consists of a flange part 43 provided in the middle part.

The glass bulb 40 of the bulb 4 is passed through the through hole 20 of the bulb holder 2 to the reflective surface 1 of the reflector 1.
0 side along the optical axis Z-Z direction, and insert the flange 43 of the bulb 4 into the through hole 20 of the bulb holder 2.
the mounting spring 3.
By pressing the flange portion 43 of the bulb 4 from behind and locking it in the locking hole 22 of the valve holder 2, the bulb is positioned so that the filament of the bulb 4 is located near the focal point F of the reflector 1. 4
is detachably attached to the reflector 1.

5 is a convex lens. This convex lens 5 connects the optical axis of the convex lens 5 to the reflector 1 via a retainer 50 and a frame 51.
It is supported so that it can share the optical axis Z-Z of. 52 is a shade attached to the frame 51.

6 is a lamp housing. A project unit composed of the reflector 1, bulb holder 2, mounting spring 3, bulb 4, convex lens 5, shade 52, etc. as described above is housed inside the lamp housing 6, and a front cover is placed in the front opening of the housing 6. 60 will be installed. This front cover 60 may be transparent or may be provided with a lens element as required.

The operation of the above-mentioned projector type lamp will be explained with reference to FIGS. 11 to 15.

First, when you light up the filament of bulb 4,
The light generated from the bulb 4 is reflected by the reflective surface 10 of the reflector 1, and the light reflected from the reflective surface 10 of the reflector 1 is meridional image ij of the convex lens 3.
incident on . This incident light is modulated by the convex lens 3 and irradiated forward.

If a screen is provided in the vicinity of the meridional images ij, and the light distribution pattern is shown as an isoluminous curve, the result will be as shown in FIG. 14. H-H is a horizontal line on the screen, and V-V is also a vertical line.

As shown in FIGS. 11 to 13, a shade 52 having an edge along meridional images ij is provided. Specifically, a cut line 53 is formed such as 53 shown in FIG. 13 to recede downward from the horizontal plane i-j of the meridional image. The aforementioned FIG. 14 shows how the aforementioned light distribution pattern and the shade 52 overlap. As shown in FIG. 14, the upper half of the light beam passes through. Most of the lower half is blocked, but cut line 5
Light is allowed to pass through the portion corresponding to 3.

As the partially covered light beams as described above are focused on the meridional images i-j and intersect with each other, the light beams projected in front of the headlight have a pattern that is an inversion of the one shown in Fig. 14. form. FIG. 15 is an explanatory diagram showing the general shape of a light projection pattern using isoluminance curves on a screen provided in front of the headlight.

This example is configured for left-hand traffic;
In the case of right-hand traffic, the configuration shown in FIGS. 13 to 15 is configured so that the right and left sides are different.

[The problem that the idea attempts to solve]

However, the above-mentioned conventional project-type lamp has a bulb holder 2 fixed to a reflector 1 by caulking, and a bulb 4 detachably attached to the bulb holder 2 in the optical axis Z-Z direction, that is, a bulb 4. The longitudinal direction of the projector is aligned (parallel) with the optical axis Z-Z, and the bulb 4 is inserted into the reflector 1 from the rear in the optical axis Z-Z direction, or extracted from the reflector 1 from the rear. There are problems such as the length l1 of the unit in the optical axis Z-Z direction, that is, the length from the front end of the convex lens 5 to the rear end of the bulb holder 2, and the depth l of the entire lamp becomes large.

Therefore, a mounting hole is opened in the horizontal direction with respect to the optical axis Z-Z of the reflector 1, and the reflector 1
The bulb holder 2 is fixed to the edge of the mounting hole, and the bulb 4 is removably arranged in the bulb holder 2 in a direction transverse to the optical axis Z-Z of the reflector 1, thereby reducing the overall depth l of the lamp. A possible configuration is possible.

Here, in a project-type lamp, it is important to accurately arrange the bulb 4 at a predetermined position and not to deform the reflector 1 in order not to deteriorate the performance of the lamp.

An object of the present invention is to provide a project-type lamp in which the bulb is installed laterally, in which the bulb can be accurately placed in a predetermined position and the reflector can be prevented from deforming.

[Means to solve the problem]

The present invention provides a mounting part in the front opening of the reflector, and also has a mounting hole in the part transverse to the optical axis of the reflector, while the bulb holder has a mounting part in the end face of the edge of the mounting hole in the reflector. A main body part is provided in contact with the main body part, and a mounting part is provided at one end of the main body part to be attached to the mounting part of the reflector from the front side, and an engaging part that engages with the reflective surface of the reflector is provided at the edge of the main body part. It is characterized by:

[Effect]

In the present invention, the main body of the bulb holder is brought into contact with the end surface of the edge of the mounting hole of the reflector, the engaging part of the valve holder is brought into engagement with the reflective surface of the reflector, and the mounting part of the valve holder is brought into contact with the end face of the rim of the mounting hole of the reflector. By attaching the bulb holder to the reflector from the front side, the bulb holder can be attached to the reflector reliably and accurately. As a result, when the bulb is attached to the bulb holder, the bulb can be accurately placed at a predetermined position within the reflective surface of the reflector, even in project-type lighting fixtures in which the bulb is placed transversely to the optical axis of the reflector. can.

Further, in the reflector, since the attachment portion for attaching the bulb holder is provided in the front opening other than the reflection surface, deformation of the reflection surface of the reflector can be prevented when the bulb holder is attached to the reflector.

Furthermore, the deformation of the reflector when replacing the bulb is prevented by the contact between the main body of the bulb holder and the end surface of the edge of the mounting hole of the reflector, and the engagement between the engaging portion of the bulb holder and the reflective surface of the reflector. be able to.

Furthermore, by attaching the attachment portion of the valve holder to the attachment portion of the reflector from the front side, the valve holder can be easily attached to the reflector.

〔Example〕

Hereinafter, one embodiment of the project-type lamp according to the present invention will be described with reference to FIGS. 1 to 9.

In the figure, the same reference numerals as in FIGS. 10 to 15 indicate the same parts. In the figure, 100 is a reflector. This reflector 100 has an opening at the front and a spheroidal reflecting surface 10 at the front side. A rectangular mounting flange 13 is integrally provided around the entire circumference of the front opening of the reflector 100, and circular through holes 14 are provided at the four corners of the mounting flange 13. A mounting hole 12 is provided at a location transverse to the optical axis Z-Z of the reflector 100.

7 is a valve holder. This valve holder 7
is made by punching and bending a thin steel plate, and has a main body 70 that is one size larger than the mounting hole 12 of the reflector 100, one end of the main body 70 is bent at a right angle, and It is provided with mounting portions 71 formed in a wing-shaped protrusion on both the left and right sides. Its mounting part 7
A circular through hole 72 is provided at both ends of 1. A spring mounting portion (cut and raised piece) 73 is provided at the center of the corner between the main body portion 70 and the mounting portion 71. A valve insertion hole 74 is provided in the center of the main body 70, and a semicircular first engagement portion 75 is provided protrudingly in the center of both left and right sides of the main body 70. A second engaging portion 76 is located near the other end.
Cut up and form. The other end of the main body part 70 is bent at right angles in the same direction as the above-mentioned bending direction of the one end, and a locking part 77 is provided at the center of the bent plate.
Three small protrusions 78 are provided protruding from the periphery of the insertion hole 74 on the bending direction side surface of both ends of the main body portion 70 . 7
9 is a mounting spring, and this mounting spring 79
A bar is bent into a U-shape, and the bent portion of the mounting spring 79 is rotatably hooked onto the spring mounting portion 73 to be mounted.

This valve holder 7 is used as the reflector 100.
into the mounting hole 12 of the reflector 100 from the front to the rear, as shown by arrow A in FIG. The mounting part 71 of the bulb holder 7 is brought into contact with the mounting collar part 13 of the reflector 100, and the two first engaging parts 75 of the bulb holder 7 are brought into contact with the reflective surfaces 10 on both sides of the mounting hole 12 of the reflector 100. are engaged with each other by point contact, and the main body 7 of the valve holder 7
0 and the second engaging portion 76, the reflector 100
The edge of the mounting hole 12 is sandwiched from the rear surface side and from the reflective surface 10 side. Next, the through hole 72 of the valve holder 7
and the through hole 14 of the reflector 100, and the bulb holder 7 is aligned with the optical axis Z of the reflector 100 by the bolt nut 15 through the through holes 72 and 14.
-Mount at a location horizontal to Z.

In this way, the glass bulb 40 of the bulb 4 is inserted into the reflector 100 through the insertion hole 74 of the bulb holder 7.
The flange 4 of the bulb 4 is inserted into the reflecting surface 10 of the bulb 4.
3 is brought into contact with the small protrusion 78 of the valve holder 7, and the mounting spring 79 is held in the locking part 77 while being pressed against the rear side of the flange part 43 of the valve 4. Then, the longitudinal direction D-D of the bulb 4 and the reflector 10
The bulb 4 is removably attached to the bulb holder 7 so that the optical axis direction Z-Z of the reflector 100 is perpendicular to the optical axis direction Z-Z and the filament of the bulb 4 is located near the focal point F of the reflector 100.

At this time, in the project-type lamp of the present invention in this embodiment, the main body portion 70 of the bulb holder 7 contacts the end surface of the edge of the mounting hole 12 of the reflector 100, and the first engaging portion 75 of the bulb holder 7 and The second engaging portion 76 is the reflective surface 10 of the reflector 100
0 side and the mounting portion 71 of the valve holder 7
Since the valve holder 7 is attached to the attachment portion 13 of the reflector 100 from the front side, the valve holder 7 is attached to the reflector 100 reliably and accurately. As a result, when the bulb 4 is attached to the above-mentioned bulb holder 7, even if the bulb 4 is disposed laterally to the optical axis Z-Z of the reflector 100 in a project-type lamp, the bulb 4 can be attached to the reflective surface of the reflector 100. 10 can be placed at a predetermined position with high precision.

In addition, in the reflector 100 described above, since the attachment part 13 for attaching the bulb holder 7 is provided in the front opening other than the reflecting surface 10, deformation in the reflecting surface 10 of the reflector 100 occurs when the bulb holder 7 is attached to the reflector 100. can be prevented.

Further, the main body 70 of the bulb holder 7 and the end face of the mounting hole 12 of the reflector 100 are brought into contact with each other, and the first engaging portion 75 and the second engaging portion 76 of the bulb holder 7 are brought into contact with the reflective surface 10 of the reflector 100. By engaging with the reflector 10 when replacing the bulb 4.
0 deformation can be prevented. That is, since the main body 70 of the valve holder 7 is in contact with the edge of the mounting hole 12 of the reflector 100, the load in the direction of arrow B in FIG. 3 when the valve 4 is assembled to the valve holder 7 by the mounting spring 79 is reduced. There is no risk that the reflector 100 will be deformed. Further, the first engaging portion 75 and the second engaging portion 76 of the valve holder 7 are connected to the reflector 10.
Since they are respectively engaged with the reflective surface 10 side of the edge of the mounting hole 12 of No. 0, the load in the direction of arrow C in FIG. 3 when replacing the bulb 4 can be sufficiently received.

Moreover, by attaching the mounting part 71 of the valve holder 7 to the mounting part 13 of the reflector 100 from the front side, the valve holder 7 can be attached to the reflector 100.
can be easily installed.

As described above, since the bulb 4 can be detachably attached in the transverse direction with respect to the optical axis Z-Z of the reflector 100, the length l2 from the front surface of the convex lens 5 to the rear part of the reflector 100, that is, the length l2 of the projector unit. The length dimension in the optical axis direction Z-Z is
It is smaller than the conventional lamp, and the length l' of the entire lamp can also be reduced.

Moreover, in this embodiment, the reflector 10
Since the mounting hole 12 is simply provided by punching, there is no need to swage or bend the reflector when assembling the valve holder, and as a result, the accuracy of the reflector 100 can be further improved.

[Effect of idea]

As described above, the project-type lamp of the present invention is a project-type lamp in which the bulb is installed laterally, and the bulb can be placed in a predetermined position with high precision, and deformation of the reflector can be prevented.

[Brief explanation of the drawing]

1 to 9 show an embodiment of the project-type lamp according to the present invention, and FIG. 1 is a cross-sectional view, and FIG.
The figure is a - line sectional view in Fig. 1, Fig. 3 is an arrow view in Fig. 1, Fig. 4 is a front view of the reflector, and Fig. 5 is a - line sectional view in Fig. 4.
6 is a sectional view taken along the - line in FIG. 4, FIG. 7 is a front view of the valve holder, FIG. 8 is a view taken in the direction of the arrow in FIG. 7, and FIG. Figure B is a view taken along arrow B in Figure 9A. FIG. 10 is a sectional view of a conventional project type lamp. 11, 12, and 13 are a plan view, a side view, and a front view of the projector unit. FIGS. 14 and 15 are explanatory diagrams showing the optical characteristics of the projector unit. 4...Bulb, 5...Convex lens, 7...Bulb holder, 70...Body part, 71...Mounting part, 75
...First engaging part, 76... Second engaging part, 100...
... Reflector, 10... Reflective surface, 12... Mounting hole, 13... Mounting part.

Claims (1)

[Scope of claim for utility model registration] A reflector with an opening in the front and a reflective surface on the front side, and a reflector attached to the reflector,
and a bulb holder that removably attaches the bulb to a predetermined position within the reflective surface of the reflector, and a convex lens disposed in front of the reflector, the light from the bulb being reflected by the reflective surface of the reflector. and a project-type lamp that emits light forward through the convex lens, wherein the reflector has a mounting portion provided in the front opening and a mounting hole opened in a portion transverse to the optical axis; The valve holder includes a main body that comes into contact with the end surface of the edge of the mounting hole of the reflector, a mounting part that is provided at one end of the main body and that is attached to the mounting part of the reflector from the front side, and a mounting part that is provided on the edge of the main body, A project-type lamp, comprising: an engaging portion that engages with a reflective surface of the reflector.