JP6532785B2 - Vehicle lamp - Google Patents

Description

  The present invention relates to a vehicle lamp.

  There is known a vehicle lamp that includes a light source, a substrate on which the light source is mounted, and a base member that holds the substrate, and is used, for example, as a brake light or a direction indicator light. As a method of holding the substrate on the base member, it is common to combine the substrate and the base member in the thickness direction of the substrate and then fasten them with a screw.

Unexamined-Japanese-Patent No. 2015-118883

  If the installation space of the substrate is restricted in structure, the substrate and the base member may not be combined in the thickness direction of the substrate as described above. In such a case, after the substrate is inserted into the groove provided in the base member in the plane direction and combined, a countermeasure is taken to provide a cover for preventing detachment on the opposite side of the substrate to the base member.

However, the width of the groove of the base member has to be larger than the thickness of the substrate due to the influence of the draft of the mold and the tolerance. Therefore, when the above-described measures are taken, the substrate may be broken or the lead wire connected to the substrate may be broken due to the vibration of the substrate in the thickness direction during traveling of the vehicle.
This invention is made in view of the above-mentioned point, The objective is to provide the vehicle lamp which can suppress the failure | damage of a board | substrate and the components mounted in it.

A vehicle lamp according to the present invention comprises a light source, a substrate on which the light source is mounted, a housing having a groove into which one end of the substrate is inserted, and a cover provided on the opposite side of the substrate to the substrate And an outer lens provided on the side opposite to the substrate with respect to the cover.
Here, the first surface, the second surface, the first inner wall surface, the second inner wall surface, the first state, and the second state are defined. The first surface is a surface on one side of the substrate in the thickness direction of the substrate. The second surface is the other surface of the substrate in the thickness direction. The first inner wall surface is a surface of the inner wall surface of the groove facing the first surface. The second inner wall surface is a surface of the inner wall surface of the groove facing the second surface. In the first state, the first surface is in contact with the first inner wall surface when the cover is not present. The second state is a state in which the second surface is in contact with the second inner wall surface when there is no cover.

In the present invention, the cover has a first facing portion facing the first surface and a second facing portion facing the second surface. The distance between the first facing portion and the second facing portion in the thickness direction of the substrate is smaller than the swing width of the other end of the substrate when the substrate changes from the first state to the second state.
By providing such a first opposing portion and a second opposing portion, it is possible to suppress the vibration in the thickness direction of the substrate when the vehicle is traveling. Therefore, damage to the substrate and components mounted thereon can be suppressed.

FIG. 1 is an exploded perspective view of a lamp according to an embodiment of the present invention. It is a front view of the lamp | ramp of FIG. It is a figure which shows the state which removed the outer lens from the lamp | ramp of FIG. It is a figure which shows the state which removed the light-guide plate and the cover from the subassembly of FIG. It is a figure which expands and shows one LED unit periphery among the subassemblies of FIG. FIG. 6 is a cut end view of the lamp of FIG. 2, corresponding to the cross section taken along line VI-VI of FIG. 5; FIG. 7 is a cut end view of the lamp of FIG. 2, corresponding to the section taken along line VII-VII of FIG. 5; FIG. 9 is a cut end view of the lamp of FIG. 2, corresponding to the cross section along line VIII-VIII of FIG. 5; FIG. 9 is a cut end view of the lamp of FIG. 2, corresponding to the cross section taken along line IX-IX of FIG. 5; FIG. 7 is a cross-sectional view schematically showing a housing, a cover, and a substrate of a cross section along line XX in FIG. 6.

Hereinafter, embodiments of the present invention will be described based on the drawings.
[One embodiment]
An illumination lamp to which a vehicle lamp according to an embodiment of the present invention is applied is shown in FIGS. 1 and 2. Hereinafter, the illumination lamp 10 will be simply referred to as the “lamp 10”. In FIG. 2, the lamp 10 is shown mounted on a vehicle. In the following description, the “vertical direction” and the “horizontal direction” will be used with reference to the state in which the lamp 10 is mounted on a vehicle.

(Whole composition of the lamp)
First, the entire configuration of the lamp 10 will be described with reference to FIGS.
As shown in FIGS. 1 to 4, the lamp 10 includes an LED 20, a substrate 22, a housing 24, a cover 26, a light guide plate 28, and an outer lens 30.
The LED 20 is a light source of the lamp 10 and is mounted on the substrate 22.

  Not only the LED 20 but also, for example, a connector 32, a lead 34, a rectifier diode (not shown) and a resistor are mounted on the substrate 22. These components constitute the LED unit 36 together with the substrate 22. The lamp 10 is provided with two LED units 36.

  The housing 24 has a central portion 40 including a through hole 38 for installing a fog lamp, not shown, and a peripheral portion 42 located around the central portion 40. The peripheral portion 42 is formed with a recess that is recessed in the horizontal direction. The concave portion includes a pair of first concave portions 44 extending in the horizontal direction at a position sandwiching the central portion 40 in the vertical direction, and a second concave portion 46 connecting ends of the first concave portions 44. One LED unit 36 is provided in one first recess 44, and the other LED unit 36 is provided in the other first recess 44.

  A groove 48 opened in substantially the same direction as the depth direction of the first recess 44 is formed at the bottom of the first recess 44. One end 50 of the substrate 22 is inserted into the groove 48. The housing 24 is a resin product molded by a mold. The depth direction of the concave portions 44 and 46 and the opening direction of the groove 48 are the same as the die extraction direction at the time of resin molding. The LED 20 emits light in a direction orthogonal to the depth direction of the recesses 44, 46.

  The cover 26 is provided on the side opposite to the groove 48 with respect to the substrate 22, and is fitted inside the concave portions 44 and 46. The cover 26 has a function as a reflector that reflects the light emitted by the LED 20 to the outer lens 30 side in addition to the function of hiding the LED unit 36 from the outside. In the present embodiment, the cover 26 forms a protrusion 52 that protrudes toward the outer lens 30 at a location corresponding to the substrate 22. The side wall of the protrusion 52 has a light passage hole 54 for passing the light emitted from the LED 20.

  The light guide plate 28 is formed to extend in a C-shape along the peripheral portion 42 at a position corresponding to the LED 20 in the depth direction of the concave portions 44 and 46. The light guide plate 28 has an incident surface 56 at a position facing the LED 20 with the light passage hole 54 interposed therebetween. The light emitted from the LED 20 and incident on the incident surface 56 is guided so as to repeat the internal reflection in the light guide plate 28 and to spread over the entire light guide plate 28. As a result, the entire light guide plate 28 looks bright from the outside.

  The outer lens 30 is provided on the side of the cover 26 opposite to the substrate 22 and closes the opening of the concave portions 44 and 46. A lamp chamber 58 is defined between the outer lens 30 and the housing 24.

  In the present embodiment, the length in the short direction of the substrate 22 is larger than the width of the first recess 44. Therefore, when installing the substrate 22 in the first recess 44, the substrate 22 and the bottom of the first recess 44 can not be combined in the thickness direction of the substrate 22. Since the installation space of the substrate 22 is restricted as described above, in the present embodiment, after the substrate 22 is inserted and combined in the surface direction of the groove 48 formed in the bottom of the first recess 44 as described above, A countermeasure is taken to provide an anti-disengagement cover 26 on the side opposite to the groove 48 with respect to the substrate 22.

  On the other hand, a method of screwing the substrate 22 to the side wall of the first recess 44 is also conceivable. However, according to this method, it is necessary to make a screw hole in a direction which intersects with the die removal direction when molding the first recess 44. Therefore, if the screw holes are also made simultaneously when the housing 24 is molded, there is a problem that the mold becomes complicated. In addition, if screw holes are machined after molding of the housing 24, there is a problem that the number of processes increases. The method of installing the substrate 22 in the present embodiment solves these problems.

(Detailed composition of the cover)
Next, the detailed configuration of the cover 26 will be described based on FIGS. FIG. 10 is a schematic view. The dimensions, angles and dimensional ratios of the parts shown in FIG. 10 are not necessarily accurate.
Here, the first surface 60, the second surface 62, the first inner wall surface 64, the second inner wall surface 66, the first state, and the second state are defined. The first surface 60 is a surface on one side of the substrate 22 in the thickness direction. The second surface 62 is the surface of the substrate 22 on the other side in the thickness direction. The first inner wall surface 64 is a surface of the inner wall surface of the groove 48 facing the first surface 60. The second inner wall surface 66 is a surface of the inner wall surface of the groove 48 facing the second surface 62. The first state is a state in which the first surface 60 and the first inner wall surface 64 are in contact with each other when the cover 26 is absent, and is a state indicated by an alternate long and short dash line in FIG. The second state is a state in which the second surface 62 and the second inner wall surface 66 are in contact with each other when the cover 26 is not present, and is a state shown by a two-dot chain line in FIG.

  As shown in FIGS. 9 and 10, the cover 26 has a first facing portion 70 facing the first surface 60 and a second facing portion 72 facing the second surface 62. In the present embodiment, the first facing portion 70 and the second facing portion 72 are inner wall surfaces of the notch 74 formed in the projecting portion 52 of the cover 26. The other end 76 of the substrate 22 is fitted in the notch 74. Also, two notches 74 are provided.

  The distance W1 in the thickness direction between the first facing portion 70 and the second facing portion 72 is smaller than the swing width W2 of the other end portion 76 when the substrate 22 changes from the first state to the second state. The interval W1 is designed to be as small as possible. In the present embodiment, the distance W1 is set to be slightly larger than the thickness t of the substrate 22. In FIG. 10, the interval W1 is shown to be larger than the actual size in order to avoid complication.

The opening end 78 of the notch 74 is formed such that the opening width increases toward the one end 50 of the substrate 22. That is, the edge of the notch 74 is chamfered. Further, the opening width W3 of the opening edge 80 of the notch 74 is larger than the swing width W2.
The longitudinal direction of the substrate 22 is a direction connecting the one end 50 and the other end 76. The insertion direction of the substrate 22 into the groove 48 is the same as the longitudinal direction of the substrate 22.

The first facing portion 70 and the second facing portion 72 are disposed facing each other in the vertical direction in the vehicle mounted state.
As shown in FIGS. 6 and 7, the protrusion 52 of the cover 26 is formed on the side opposite to the bottom of the housing 24 with respect to the substrate 22 in order to suppress the looseness in the direction in which the substrate 22 comes out of the groove 48. And a substrate support 82. The gap between the substrate support 82 and the substrate 22 is designed to be as small as possible.

(effect)
As described above, in the present embodiment, one end 50 of the substrate 22 is inserted into the groove 48 of the housing 24. The cover 26 has a first facing portion 70 facing the first surface 60 and a second facing portion 72 facing the second surface 62. The distance W1 in the thickness direction between the first facing portion 70 and the second facing portion 72 is smaller than the swing width W2 of the other end portion 76 when the substrate 22 changes from the first state to the second state.
By providing such a first opposing portion 70 and a second opposing portion 72, it is possible to suppress the vibration in the thickness direction of the substrate 22 when the vehicle is traveling. Therefore, damage to components such as the substrate 22 and the LED 20 and the lead wires 34 mounted thereon can be suppressed.

  Further, in the present embodiment, the opening end 78 of the notch 74 is formed such that the opening width increases toward the one end 50 of the substrate 22. Further, the opening width W3 of the opening edge 80 of the notch 74 is larger than the swing width W2. Therefore, even when the substrate 22 provided in the first recess 44 is hidden behind the cover 26 when the cover 26 is assembled to the housing 24, the open end allows the substrate 22 to be reliably fitted in the notch 74. It can be made to guide to the part 78.

Further, in the present embodiment, two notches are provided. Therefore, the substrate 22 can be stably supported.
Further, in the present embodiment, the first facing portion 70 and the second facing portion 72 are disposed facing each other in the vertical direction in the vehicle mounted state. As described above, when the first facing portion 70 and the second facing portion 72 are disposed to face each other in the vertical direction, there is a concern that the substrate 22 vibrates more violently in the thickness direction due to the vibration when the vehicle is traveling. According to this, the vibration in the thickness direction of the substrate 22 can be suitably suppressed.

[Other embodiments]
In another embodiment of the present invention, only one LED unit may be provided, or three or more LED units may be provided.
In other embodiments of the invention, light sources other than LEDs may be used.
In another embodiment of the present invention, the substrate is not limited to being installed in the recess of the housing, and may be installed outside the recess.
In the other embodiment of the present invention, the first facing portion and the second facing portion are not limited to the inner wall surface of the notch, but may be, for example, the inner wall surface of the groove, or may be composed of a pair of protrusions .

In another embodiment of the invention, the substrate support may consist of the bottom of the notch.
In other embodiments of the invention, the cover may not function as a reflector.
In another embodiment of the present invention, the light guide plate may be integral with the outer lens or integral with the cover. Further, the light guide plate itself may not be provided.

In another embodiment of the present invention, the lamps may be installed anywhere on the vehicle, not limited to those installed around the fog lamps.
In another embodiment of the present invention, the lamp is not limited to the illumination lamp, but may be, for example, other vehicle lamps such as a brake lamp, a turn indicator lamp, a side lamp, a steering lamp, a welcome lamp and a daytime running lamp. It is also good.
The present invention is not limited to the embodiments described above, and can be implemented in various forms without departing from the scope of the invention.

20 ・ ・ ・ LED (light source)
22 ... substrate 24 ... housing 26 ... cover 30 ... outer lens 48 ... groove 50 ... one end 60 ... first surface 62 ... second surface 64 ... 1st inner wall surface 66 ... 2nd inner wall surface 70 ... 1st opposite part 72 ... 2nd opposite part 76 ... other end W1 ... interval W2 ... swing width

Claims (5)

A light source (20),
A substrate (22) on which the light source is mounted;
A housing (24) having a groove (48) into which one end (50) of the substrate is inserted;
A cover (26) provided on the opposite side of the groove to the substrate;
An outer lens (30) provided on the side opposite to the substrate with respect to the cover;
Equipped with
The surface on one side of the substrate in the thickness direction of the substrate is referred to as a first surface (60),
The surface on the other side in the thickness direction of the substrate is a second surface (62),
A surface of the inner wall surface of the groove facing the first surface is a first inner wall surface (64),
A surface of the inner wall surface of the groove facing the second surface is a second inner wall surface (66),
A state in which the first surface is in contact with the first inner wall surface when there is no cover is referred to as a first state.
Assuming that the second surface is in contact with the second inner wall surface when there is no cover, in the second state:
The cover has a first facing portion (70) facing the first surface, and a second facing portion (72) facing the second surface,
The distance (W1) in the thickness direction between the first facing portion and the second facing portion is the other end (76) of the substrate when the substrate changes from the first state to the second state. A vehicle lamp characterized by being smaller than a swing width (W2). The cover has a notch (74) into which the other end of the substrate is fitted;
The vehicular lamp according to claim 1, wherein the first opposing portion and the second opposing portion are inner wall surfaces of the notch. The open end (78) of the notch is formed such that the opening width increases toward the one end,
The opening width (W3) of the opening edge (80) of the notch is characterized by being larger than the swing width of the other end when the substrate changes from the first state to the second state. Item 2. A vehicle lamp according to item 2 . The vehicular lamp according to claim 2 or 3 , wherein two or more notches are provided.   The vehicle lamp according to any one of claims 1 to 4, wherein the first facing portion and the second facing portion are disposed to face each other in the vertical direction in a vehicle mounted state.

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