JP2014229569A - Vehicle light - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle light in which a retainer can be easily attached to a main body with a lens sandwiched therebetween.SOLUTION: A vehicle light 1 includes: a light source; a lens 11; a lens frame 16 for attaching the lens 11 thereto; and a retainer 5 which has an opening 5b through which the lens 11 is exposed to the inside, externally fitted with a peripheral edge of the lens 11, and is fitted to the lens frame 16 with the lens 11 sandwiched therebetween. The lens frame 16 has protrusions 16b, 16c formed at a side face of the lens frame 16, and the retainer has a fastening part 5d which extends to a light axis direction from the side face, has elasticity in a direction which substantially orthogonal to the light axis, and is engaged with the protrusions.

Description

  The present invention relates to a vehicular lamp.

  Conventionally, as this type of vehicle lamp, there is a projector-type lamp that uses a halogen lamp as a light source. In this projector-type lamp, the retainer that supports the glass lens is fixed to the shade by caulking. The reason for fixing by caulking is that the glass lens is heavy and the flange portion of the glass lens is prevented from cracking due to brittleness.

  As a prior art document of this type, Patent Document 1 discloses a structure in which a projection lens is fixed to a lens holder by a retainer. Patent Document 2 discloses a structure in which a locking claw and an insertion hole are formed in the lens and the lens holder, respectively, and the lens is attached to the lens holder. Patent Document 3 discloses a structure in which a member having high thermal resistance is interposed between a resin optical member and a heat sink.

JP 2000-057813 A JP 2012-119285 A JP 2009-277535 A

  However, when the retainer is fixed by caulking as in the prior art, the work is time-consuming. In addition, it is not easy to remove the lens once it has been attached, and maintenance is difficult.

  In recent years, projector-type lamps using LEDs have emerged as light sources, and along with this, resin lenses made of acrylic that do not require much heat resistance have been used instead of glass lenses. The resin lens is lightweight and has a sticky flange. For this reason, it has been desired to easily attach the retainer without performing the work of fixing the resin lens by caulking.

  This invention is made | formed in view of this point, and it aims at providing the vehicle lamp with which a holder can be easily attached to a main-body part on both sides of a lens.

In order to achieve such an object, the present invention is grasped by the following configuration.
(1) The present invention includes a light source, a lens, a main body portion to which the lens is attached, and an opening portion through which the lens is exposed. A holder that is fitted to the main body, the main body has a protrusion formed on a side surface of the main body, and the holder extends in the optical axis direction from the side of the holder. It has a fastening portion that extends, has elasticity in a direction substantially orthogonal to the optical axis, and engages with the protruding portion.

(2) According to the present invention, in the configuration of (1), the end portion of the fastening portion is formed outwardly with respect to the optical axis, and a hole is formed on the surface of the fastening portion. The protrusion is formed in a mountain shape having a slope and a top in the optical axis direction, and when the holder is fitted to the main body, the end of the fastening part extends along the slope of the protrusion. After extending outward and exceeding the top portion, the top portion is fitted into the hole portion of the fastening portion, whereby the fastening portion is engaged with the projection portion.

(3) According to the present invention, in the configuration of (1) or (2), the fastening portion is centered on the optical axis, and is predetermined from a direction perpendicular to a mounting surface on which the vehicle lamp is attached to another member. Are formed symmetrically on a diagonal line centered on the optical axis, and the protrusion is inclined at the predetermined angle about the optical axis or at the predetermined angle. It is characterized by being formed symmetrically on a diagonal line centered on the optical axis at a position inclined only in the opposite direction.

(4) According to the present invention, in the configurations of (1) to (3), the front surface of the holder has a portion corresponding to the position of the peripheral portion of the lens fixed to the main body portion outside the other portions. It is formed on a protruding flat surface, and the fastening portion is formed at a position inclined by the predetermined angle so as to avoid the protruding portion on the outside.

(5) In the configurations of (1) to (4), the present invention includes a spacer that is provided between the rear surface of the peripheral edge of the lens and the front surface of the main body, and has a higher heat-resistant temperature than the lens. It is characterized by that.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle lamp with which a holder can be easily attached to a main-body part on both sides of a lens can be provided.

It is a figure which shows the external appearance and the structure of the vehicle lamp 1 in this embodiment. It is a front view which shows the shape of the retainer 5. FIG. It is an end view which shows the attachment structure of the vehicle lamp 1. FIG. It is a figure which shows the external appearance of the left-right paired vehicle lamp 1 at the time of seeing from the front upper direction. It is a front view which shows the external appearance of the left-right paired vehicle lamp 1 corresponding to FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The vehicular lamp according to the present embodiment is applied to a projector-type light projecting unit that uses an LED as a light source, which is used for a headlamp.

  FIG. 1 is a diagram showing the appearance and structure of a vehicular lamp 1 according to this embodiment. 1A shows a perspective view, and FIG. 1B shows an exploded view.

  The vehicular lamp 1 includes a retainer 5, a lens 11, a resin plate 13, a lens frame 16, an LED (light emitting element) 17 as a light source, a reflector 18, and a heat sink 19.

  The retainer 5 is formed of a metal plate, has an opening 5b through which the lens 11 is exposed, and holds the lens 11 by externally fitting a flange portion 11a formed at the peripheral edge of the lens 11. Is. The shape of the retainer 5 will be described later.

  The lens 11 is a resin lens and collects light emitted from the LED 17 and reflected by the reflector 18 and projects it in the optical axis direction. In the present embodiment, acrylic resin is used as the material of the resin lens. The heat resistant temperature of the acrylic resin is 70 to 80 ° C. The material of the resin lens is not limited to this.

  The resin plate 13 is sandwiched between the rear surface of the flange portion 11a of the lens 11 and the front end surface 16a of the lens frame 16, and heat is prevented from being transmitted from the front end surface 16a of the lens frame 16 to the lens 11 side. Prevent deformation. In the present embodiment, polycarbonate having a heat resistant temperature of 110 to 120 ° C. is used as the material of the resin plate 13.

  The lens frame 16 is formed integrally with the heat sink 19 and is a member to which the retainer 5 is fitted while suppressing diffusion of light emitted from the LED 17. The front end surface 16a of the lens frame 16 is formed on a ring-shaped flat surface with which the resin plate 13 abuts. Further, as will be described later, a projection 16b and a mountain-shaped projection 16c are formed on the side surface of the lens frame 16 to engage with the engaging portion 5f and the retaining portion 5d formed on the retainer 5, respectively.

  The LED 17 emits diffused light, is accommodated in a space covered with the lens frame 16, and is installed on a pedestal 19a of the heat sink 19 (see FIG. 3).

  The reflector 18 is disposed on the rear side of the lens frame 16 and in the optical axis direction passing through the center of the lens 11, and reflects the light emitted from the LED 17 toward the lens 11.

  The heat sink 19 releases heat emitted from the LED 17 to the outside. The heat sink 19 is mounted on the mounting surface 19b for mounting the vehicular lamp 1 to another member, and vertically downward (downward in FIG. 1) from the mounting surface 19b. A plurality of extended fins 19c are provided. The heat sink 19 is formed with a pedestal 19a on which the LEDs 17 are installed. In the present embodiment, the heat sink 19 is formed integrally with the lens frame 16, but may be formed separately. In the present embodiment, the main body portion includes the lens frame 16, the heat sink 19, and the reflector 18.

  FIG. 2 is a front view showing the shape of the retainer 5. The retainer 5 has an opening 5 b in which the lens 11 is exposed on the inner side, has an annular member 5 a that externally fits a flange portion 11 a that is a peripheral portion of the lens 11, and is fitted to a side surface of the lens frame 16.

  On the side surface of the annular member 5 a of the retainer 5, an engaging portion 5 f that engages with a protrusion 16 b formed on the side surface of the lens frame 16 and a locking piece 5 c that externally fits the side surface of the lens frame 16 are formed. .

  Further, on the side surface of the annular member 5a, a fastening portion 5d extending from the side surface in the optical axis direction and having elasticity in a direction substantially orthogonal to the optical axis o is formed. As will be described later, the fastening portion 5d engages with a mountain-shaped protrusion 16c formed on the side surface of the lens frame 16 and functions as a spring member biased toward the optical axis o. Further, a hole 5d1 is formed on the surface of the fastening portion 5d (see FIG. 3C).

  The front surface 5e of the annular member 5a of the retainer 5 is formed as a flat surface. The front surface 5e is formed with a flat surface portion 5e1 that is a portion protruding outward from the other portions. The flat surface portion 5 e 1 is a portion corresponding to a position where the flange portion 11 a of the lens 11 is fixed to the front end surface 16 a of the lens frame 16. Further, a concave portion 5e2 is formed in the flat portion 5e1.

  The retaining portion 5d is centered on the optical axis o so as to avoid the flat surface portion 5e1, and is perpendicular to the mounting surface 19b of the heat sink 19 (in the present embodiment, the vertical direction) at a predetermined angle (in the present embodiment). , 45 degrees) and symmetrically arranged on a diagonal line with the optical axis o as the center. Further, the engaging portion 5f is symmetrically disposed on the diagonal line orthogonal to the diagonal line where the retaining portion 5d is disposed with the optical axis o as the center.

  On the other hand, the mountain-shaped protrusion 16c is located at a position inclined at a predetermined angle (45 degrees) about the optical axis o or at a position inclined in the opposite direction so as to face the fastening portion 5d, and the optical axis o is inclined. It is symmetrically formed on a diagonal line as a center. Further, the projecting portion 16b is formed symmetrically on a diagonal line orthogonal to the diagonal line on which the projecting portion 16c is disposed, with the optical axis o as the center so as to face the engaging portion 5f.

  FIG. 3 is an end view showing the mounting structure of the vehicular lamp 1. FIG. 3A shows an end face of the vehicular lamp 1 in the optical axis direction. FIG. 3B shows an enlarged view of a portion surrounded by the symbol a in FIG. The back surface of the annular member 5 a of the retainer 5 and the surface of the flange portion 11 a of the lens 11 come into contact with each other, and the lens 11 is pressed toward the lens frame 16 by the annular member 5 a of the retainer 5.

  FIG. 3C shows an enlarged view of a portion surrounded by the symbol b in FIG. As described above, the fastening portion 5d is formed as a spring member that is biased toward the optical axis o. Further, the end portion 5d2 of the retaining portion 5d is formed to warp outward with respect to the optical axis o. Further, a hole 5d1 is formed on the surface of the fastening portion 5d.

  On the other hand, the protrusion 16c formed on the side surface of the lens frame 16 is formed in a mountain shape having an inclined surface 16c2 and a top 16c1 along the optical axis direction.

  The vehicular lamp 1 having the above structure is assembled in the following procedure. An LED 17 is installed on a pedestal 19 a of a heat sink 19 that is formed integrally with the lens frame 16 in advance. The annular member 5a of the retainer 5 is attached to the front end surface 16a of the lens frame 16 with the flange portion 11a of the lens 11 and the resin plate 13 interposed therebetween.

  When the retainer 5 is pressed to the lens frame 16 side when the annular member 5a of the retainer 5 is fitted to the side surface of the lens frame 16, as shown in FIG. 3C, the end portion 5d2 of the retaining portion 5d becomes the lens frame. It spreads outward along the slope 16c2 of the mountain-shaped protrusion 16c formed on the side surface of 16. Then, when the end portion 5d2 of the fastening portion 5d exceeds the top portion 16c1 of the projection portion 16c, the top portion 16c1 is fitted into the hole portion 5d1 of the fastening portion 5d that is to be returned to its original state by a spring force. Thereby, the fastening part 5d is engaged with the protrusion part 16c. The appearance of the vehicular lamp 1 assembled in this way is as shown in FIG.

  Further, when the retainer 5 is removed from the lens frame 16, when the end portion 5d2 of the fastening portion is expanded to extend beyond the top portion 16c1 of the projection portion 16c and is shifted to the front side, the end portion 5d2 of the fastening portion has the slope 16c2 of the projection portion 16c. Stenosis to slip. Thereby, the fastening part 5d is released from the protrusion part 16c.

  In this embodiment, the vehicular lamp 1 is a projector-type light projecting unit used for a headlamp of a vehicle, and two are prepared for the right side and the left side. FIG. 4 is a diagram showing an appearance of the pair of left and right vehicle lamps 1 when viewed from the front upper side. FIG. 5 is a front view showing an appearance of a pair of left and right vehicular lamps 1 corresponding to FIG. Here, when it is necessary to distinguish the vehicular lamp 1 from left to right, they are referred to as a left-side vehicular lamp 1A and a right-side vehicular lamp 1B.

  4 (A) and 5 (A) show a left vehicular lamp 1A. 4 (B) and 5 (B) show a vehicle lamp 1B for the right side. Similarly, the lens frame 16 is referred to as a left lens frame 16A and a right lens frame 16B. As described above, the retainer 5 of the present embodiment is used in common for the pair of left and right vehicle lamps 1.

  In the left vehicle lamp 1A, the mountain-shaped protrusion 16c formed on the side surface of the lens frame 16A is inclined to the right when viewed from the front. On the other hand, in the right vehicle lamp 1B, the mountain-shaped protrusion 16c formed on the side surface of the lens frame 16B is inclined to the left as viewed from the front. That is, in the case of the left side, the protrusions 16c are formed symmetrically on a diagonal line centered on the optical axis o at a position inclined 45 degrees right about the optical axis o. In the case of the right side, the protrusion 16c is formed symmetrically on a diagonal line centered on the optical axis o at a position inclined 45 degrees to the left with respect to the optical axis o.

  In the left vehicle lamp 1A, the protrusion 16b formed on the side surface of the lens frame 16 is inclined to the left as viewed from the front. In the right vehicle lamp 1B, the protrusion 16b formed on the side surface of the lens frame 16 is inclined to the right when viewed from the front.

  On the other hand, as shown in FIG. 2, the fastening portions 5d are arranged symmetrically on a diagonal line with the optical axis o as the center, tilted 45 degrees to the left with respect to the vertical direction, and centered on the optical axis o. Has been. Further, the engaging portions 5f are symmetrically disposed on a diagonal line centered on the optical axis o at a position inclined to the right by 45 degrees with respect to the vertical direction with the optical axis o as the center. Accordingly, the retainer 5 can be mounted on either the left lens frame 16A or the right lens frame 16B by tilting 90 degrees about the optical axis o.

  When the retainer 5 is tilted 90 degrees to the right about the optical axis o from the state in which the retainer 5 can be attached to the right lens frame 16B, the retaining portion 5d faces the protrusion 16c of the left lens frame 16A. The engaging portion 5f faces the protruding portion 16b of the lens frame 16A. Therefore, the retainer 5 is fitted to the left lens frame 16A by mounting the retainer 5 in the optical axis direction as it is.

  The above is description of the vehicle lamp 1 of this embodiment. According to this embodiment, the work of fixing the resin lens by caulking is unnecessary, and the retainer can be easily attached to the lens frame with the lens interposed therebetween. In this embodiment, the retainer can be easily attached to the lens frame simply by pressing the retainer in the optical axis direction, so that the work can be simplified.

  In addition, since the retainer can be attached to both the left side lens frame and the right side lens frame in which the positions where the chevron-shaped protrusions are formed are opposite to each other by a predetermined angle, the parts can be shared.

  Moreover, since the fastening portion is formed to be inclined so as to avoid the flat portion that is a portion protruding outward, the outer shape of the holder can be suppressed from becoming large.

  In addition, since the resin spacer is interposed between the rear surface of the flange portion of the lens and the front end surface of the lens frame, it is difficult for heat to be transmitted to the lens side, and deformation due to heat of the lens is suppressed.

  The present invention is not limited to the configuration of the above-described embodiment, and any configuration can be used as long as the functions shown in the claims or the functions of the configuration of the present embodiment can be achieved. Is also applicable.

  For example, the resin lens may be integrally molded with an acrylic resin, or may be molded with glass if at least the flange portion is resin. Further, when the lens is fixed by the spring force of the retainer, a resin having excellent impact resistance is used for the flange portion to which local stress is applied, so that cracks and cracks do not occur.

  Moreover, although the case where it applied to vehicle lamps, such as a headlamp, was shown in the said embodiment, this invention is not limited to this, It can apply to various lamps, such as a room light, a searchlight, and a photography light. It is.

DESCRIPTION OF SYMBOLS 1, 1A, 1B Vehicle lamp 5 Retainer 5a Annular member 5b Opening part 5c Locking piece 5d Stopping part 5d1 Hole part 5d2 End part 5e Front surface 5e1 Flat part 5e2 Concave part 5f Engagement part 11 Lens 11a Flange part 13 Resin spacer 16, 16A, 16B Lens frame 16b, 16c Protrusion 16c1 Top 16c2 Slope 17 LED
18 Reflector 19 Heat sink 19a Pedestal 19b Mounting surface 19c Fin

Claims (5)

A light source;
A lens,
A main body for attaching the lens;
An opening that exposes the lens on the inside, a peripheral edge of the lens is externally fitted, and a holder that is fitted to the main body with the lens interposed therebetween,
The main body has a protrusion formed on a side surface of the main body,
The holder has a fastening portion that extends in a direction of an optical axis from a side surface of the holder, has elasticity in a direction substantially orthogonal to the optical axis, and engages with the protrusion.
A vehicular lamp characterized by the above. The end of the fastening portion is formed to warp outward with respect to the optical axis, and a hole is formed on the surface of the fastening portion,
The protrusion is formed in a mountain shape having a slope and a top in the optical axis direction,
When the holder is fitted into the main body, the end of the fastening part is expanded outward along the slope of the protrusion, and after the top part, the top part is inserted into the hole part of the fastening part. The vehicular lamp according to claim 1, wherein the fastening portion is engaged with the protruding portion by fitting. The fastening portion is a diagonal line centered on the optical axis at a position inclined by a predetermined angle from a vertical direction with respect to a mounting surface on which the vehicular lamp is mounted on another member, with the optical axis as a center. Formed symmetrically on top,
The protrusions are formed symmetrically at a position inclined by the predetermined angle about the optical axis or at a position inclined in the opposite direction by the predetermined angle and on a diagonal line centered on the optical axis. The vehicular lamp according to claim 1, wherein the vehicular lamp is provided. The front surface of the holder is formed on a flat surface in which a portion corresponding to the position of the peripheral portion of the lens fixed to the main body portion protrudes outside the other portion,
The vehicular lamp according to any one of claims 1 to 3, wherein the fastening portion is formed at a position inclined by the predetermined angle so as to avoid a portion protruding outward. .   5. The spacer according to claim 1, further comprising a spacer that is provided between a rear surface of a peripheral portion of the lens and a front surface of the main body, and has a higher heat-resistant temperature than the lens. Vehicle lamp.

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