JP2008164312A - Light emitting apparatus, its manufacturing method, and spontaneous light emission pointer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easily assembled and highly reliable light emitting apparatus having no deformation etc. of resin members by heat and reliably electrically connected to a light-emitting element and provide its manufacturing method and a spontaneous light emission pointer. <P>SOLUTION: The light emitting apparatus is provided with: a wiring board to which the light-emitting element is mounted; a photo-conductor for conducting light from the light-emitting element; and a supporting member to which the wiring board and the photo-conductor are mounted. The wiring board has protrusion parts of connecting terminals to be electrically connected to the light-emitting element. The supporting member is provided with both a terminal receptacle having holes to be fitted over the connecting terminal protrusion parts and a conductor wiring. The conductor wiring is electrically connected to the connecting terminals via the terminal receptacle. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a light emitting device, a method for manufacturing the same, and a self-light emitting guideline, and more specifically, a light emitting device in which light from a light emitting element is emitted through a light guide and can be used as a pointer for various meters and the like The manufacturing method and the self-luminous guideline.

2. Description of the Related Art In recent years, a self-luminous pointer that emits light from a pointer by mounting a light emitting element such as an LED on the pointer is used as a pointer used in a vehicle meter or the like in order to improve visibility.
As this type of self-light emitting pointer, for example, a pointer equipped with a light emitting element, a driving device having a rotating shaft for rotating the pointer around an axis, a light emitting element and a predetermined conductive member (circuit) arranged behind the pointer There has been proposed one composed of a strip-shaped flexible conductor that is electrically connected to a substrate (for example, Patent Document 1).
In this self-light-emitting pointer, the light-emitting element is directly mounted on the pointer, and the electrical connection to the electrode terminal of the light-emitting element is performed using solder via the pointer terminal inserted into the through-hole formed in the pointer. Has been done.
JP 2002-357462 A

Since the pointer itself is usually formed of a resin material for weight reduction, the pointer itself is deformed or deteriorated by heat by soldering the electrode terminal of the light emitting element and the terminal inserted into the resin material. Could be damaged. Therefore, it is necessary to inspect the quality at this stage, which complicates the manufacturing process. In addition, the assembly work is complicated, not only reducing the mass productivity, but also easily producing defective products, reducing the yield.
The present invention has been made in view of the above problems, is easy to assemble, has no deformation or deterioration of a resin member or the like due to heat, and has a reliable light emission in which electrical connection to a light emitting element is reliably performed. It is an object of the present invention to provide a device, a manufacturing method thereof, and a self-luminous guide.

A light emitting device of the present invention is a light emitting device including a wiring board on which a light emitting element is mounted, a light guide that guides light from the light emitting element, and a support member on which the wiring board and the light guide are placed. In the apparatus, the wiring board includes a protruding portion of a connection terminal that is electrically connected to the light emitting element, and the support member includes a terminal receiver having a hole that fits into the protruding portion of the connection terminal. In addition, a conductor wiring is provided, and the conductor wiring is electrically connected to the connection terminal via the terminal receiver.
In this light emitting device, it is preferable that the protruding portion of the connection terminal is provided by a pin inserted through a hole penetrating in the thickness direction of the wiring board.
Moreover, the self-light-emitting pointer of the present invention includes the above-described light-emitting device.

Furthermore, the manufacturing method of the light emitting device of the present invention includes:
A wiring board on which a light emitting element is mounted;
A light guide that guides light from the light emitting element;
A support member on which the wiring board and the light guide are placed, and a manufacturing method of a light emitting device comprising:
Placing the wiring board on which the light emitting element is mounted on a support member;
Projecting a part of the connection terminal from the back surface of the wiring board;
A step of fitting the protruding portion of the connection terminal to a terminal receiver provided in the support member to fix the support member and the wiring board.

In such a method of manufacturing a light emitting device, a part of the connection terminal can be protruded from the back surface of the wiring board by inserting the connection terminal through a hole penetrating in the thickness direction of the wiring board.
Further, the connection terminal can electrically connect the wiring board and the conductor wiring of the support member.
Furthermore, it is preferable that the connection terminal is pre-soldered to the wiring board before the wiring board is placed on the support member.
Moreover, it is preferable that the shape of the edge part of the said connection terminal is a rectangular parallelepiped, and the rectangular parallelepiped opening part which fits the edge part of the said connection terminal is formed in the said terminal receptacle.

According to the light emitting device and the self light emitting guideline of the present invention, since the light emitting element is used, not only the light emitting device and the self light emitting guideline having good visibility can be obtained, but also the connection terminal and the conductor wiring are made of members. Since it can connect by the simple method by insertion or fitting, assembly property can be improved greatly. In addition, electrical connection can be ensured to improve yield, and a highly reliable light-emitting device can be obtained.
Moreover, according to the manufacturing method of the light-emitting device of the present invention, it is possible to make the manufacturing process simpler without performing the soldering connection, eliminating the accompanying inspection process.

  For example, as shown in FIG. 1, the light emitting device of the present invention mainly includes a wiring board 12 on which the light emitting element 11 is mounted, a light guide (not shown) that guides light of the light emitting element 11, and wiring. It comprises a substrate 12 and a support member 14 on which the light guide is placed.

  The wiring board is a hard or flexible board made of, for example, plastic, and includes a light emitting element and, optionally, various circuit components (not shown) such as a protective element, a resistor, and a capacitor. These light emitting elements or components are mounted thereon. For example, any light emitting element may be used as long as it is known as a semiconductor light emitting element, and two or more light emitting elements may be mounted on one wiring board.

  Further, the wiring board is usually provided with a protruding portion from which a connection terminal that is electrically connected to a wiring pattern connected to the light emitting element protrudes. The shape of the protrusion of the connection terminal and the aspect of the protrusion are not particularly limited. For example, the protrusion may protrude in the plane direction in which the wiring board extends, or bend and protrude in the plane direction parallel to the plane in which the wiring board extends. Or it may protrude so that a convex part may be comprised up and down the plane which a wiring board extends. Especially, it is preferable to protrude so that a convex part may be formed under the plane which a wiring board extends. This is because the connection terminals themselves can be easily formed and the assembly of the light emitting device is simplified.

  For example, the connection terminal may be provided integrally with the wiring board, or may be formed separately from the wiring board. In the former case, for example, a protruding portion made of a wiring substrate material formed into a terminal shape is formed integrally with the wiring substrate, and a conductive material is applied to the protruding portion by vapor deposition, printing, or the like. Can be mentioned. In the latter case, it can be formed by combining parts made of conductive materials of various shapes such as pins and rods. Note that the shape of the end of the connection terminal is not particularly limited, but is preferably a quadrangular prism or a cylinder. This is to stably perform fitting to a terminal receiver described later. In this case, a through hole is formed in the thickness direction of the wiring board, and by inserting the connection terminal into the through hole, the connection terminal is preferably protruded from the wiring board, preferably from the back surface of the wiring board. . In addition, in order to fix the connection between the wiring board and the connection terminal, solder may be used, or an adhesive such as a conductive paste may be used. In particular, by soldering the wiring board and the connection terminal before fixing the support member and the wiring board, the reliability of the light emitting device can be obtained by the firm fixation by soldering, and the support member can be soldered. Thermal damage due to can be avoided.

  The light guide is generally formed in the same shape as a support member to be described later with a resin having translucency. The light guide body covers the light emitting element and plays a role of guiding and diffusing light from the light emitting element.

  A support member is a member which supports the wiring board mentioned above, and can be made into various shapes according to the use. For example, when a self-luminous pointer as described later is configured, it preferably has a pointer-like shape extending in the longitudinal direction corresponding to a scale display plate such as a meter. The support member can be formed of, for example, a light transmissive, semi-transmissive, or non-transmissive resin. The support member mounts the above-described wiring board thereon, and further mounts the light guide so that the light guide covers the wiring board, particularly the light emitting element mounted thereon. To do.

  The support member is provided with conductor wiring and includes a terminal receiver. The conductor wiring and the terminal receiver may be formed integrally with the support member, or may be formed separately to be combined with the support member. In particular, it is preferable that the conductor wiring is formed of a material different from that of the support member, and is separately formed and later attached to the support member or formed so as to be partially embedded in the support member. The terminal receiver is preferably formed separately from the support member and then formed so as to be combined (that is, fitted) to the support member (that is, the conductor wiring).

The conductor wiring is for electrical connection with the connection terminal, one end of which is for connection with the connection terminal, and the other end is a power source capable of energizing the light emitting element, other drive circuits or devices, control It is formed for connection to a circuit or device.
The shape of the conductor wiring is not particularly limited as long as it is made of a conductive material. For example, it is preferable that both the one end and the other end are formed in a shape protruding from the support member. By having this protrusion part, the connection with the terminal receptacle mentioned later and also the connection with a power supply etc. become easy.

For example, one end and the other end of the conductor wiring may protrude in a plane direction in which the support member extends, may protrude in a plane direction parallel to the plane in which the support member extends, or the plane in which the support substrate extends. You may protrude so that a convex part may be comprised up and down. In particular, one end for connecting to the connection terminal preferably protrudes in a planar direction in which the support member extends, and more preferably protrudes toward the vicinity of the tip of the connection terminal. Moreover, it is preferable that the other end for connecting to a power supply etc. protrudes so that a convex part may be comprised below from the plane which a support substrate extends.
The conductor wiring can be formed in a desired planar shape by, for example, pressing or cutting a metal plate, and can be formed in a desired shape by bending the planar shape.

  The terminal receiver is used to electrically connect the conductor wiring of the support member and the connection terminal by fitting, and any shape and material can be used as long as it can perform this function. May be. For example, in order to fit the conductor wiring and the connection terminal, it is preferable to have a hole corresponding to a part of the conductor wiring and the connection terminal (that is, the protruding portion). Note that at least a portion in contact with the conductor wiring and the connection terminal is required to be provided with a conductive material and to be connected with the conductive material therebetween. Therefore, it is preferable that at least a part (at least a part inside) of the hole for fitting the conductor wiring and the connection terminal is covered with the conductive material. Moreover, although the connection between these may be performed ranging over the outer side between holes, it is preferable that holes are connected in the inside. Thereby, disconnection of the conductive material can be prevented due to physical stress, impact, or the like from the outside. Note that the entire terminal receiver may be formed of a conductive member.

  For example, examples of the outer shape of the terminal receiver include a quadrangular column, a cylinder, a sphere, and a shape similar to this. Moreover, the shape which these two connected directly or indirectly may be sufficient. In addition, as described above, when the end shape of the connection terminal is a quadrangular column or a cylinder, it is suitable that the corresponding hole has a quadrangular column or a column shape. By making the outer shape of the connection terminal into a rectangular parallelepiped and the shape of the hole of the terminal receiver that fits into the protruding portion of the connection terminal into a rectangular parallelepiped, rotation of the connection terminal can be suppressed and fixed securely.

  Accordingly, the terminal receiver for fitting the conductor wiring and the connection terminal has, for example, a substantially square pillar or the like, and has holes on the upper surface and the side surface for fitting the connection terminal from the upper surface and the conductor wiring from the side surface, respectively. In order to fit the connection terminal from the upper side and the conductor wiring from the lower side, the form in which these holes are electrically connected inside (see FIG. 3), the outer shape is a substantially square pillar, etc. The holes are formed at different positions on the side surfaces, and the holes communicate with each other inside (see FIG. 6). The outer shape is a substantially rectangular column or the like, and both the connection terminal and the conductor wiring are fitted from the upper surface. In order to match, holes are formed at different positions on the upper surface, the holes communicate with each other inside, the outer shape is a substantially square pillar, and the connection terminal is fitted from the upper side, and the conductor wiring is fitted from the lower side In order to make The shape in which the holes communicate with each other inside, the shape having the same shape and the hole, the shape in which they are directly or indirectly connected (see FIG. 5), etc. Illustrated. The hole may have a bottomed shape or a through hole.

The terminal receiver may be used as it is, for example, by forming a hollow bifurcated tube with metal, or by forming the tube into a shape such as a square pole, for example, by sandwiching this tube with a mold. Can be formed. Alternatively, a lump of conductive material may be formed, and holes may be formed so as to communicate with each other from two directions.
When the terminal receiver and the connection terminal or the conductor wiring are fitted, an adhesive such as a conductive paste may be used to strengthen the connection.

  When a self-light emitting pointer is formed using such a light emitting device, a cover member such as a support member, a power source for driving the light emitting device, and various circuits for driving the pointer may be provided. Good. In particular, connection to a power source, various circuits for driving the pointer, and the like can be realized by, for example, a protruding portion of a conductor wiring.

  Embodiments of a light emitting device, a method for manufacturing the same, and a self-light emitting guide according to the present invention will be described below in detail with reference to the drawings.

Embodiment 1
The self-light emitting pointer is used for, for example, a speedometer of an automobile, and includes a light emitting device 10 and a cover member (not shown) as shown in FIG.
The light emitting device 10 includes a wiring board 12 on which the light emitting element 11 is mounted, a light guide (not shown) that guides light of the light emitting element 11, and a support member 14 that supports the wiring board 12 and the light guide. It is prepared for.

  As shown in FIGS. 1 and 2, the wiring substrate 12 is a plate-shaped plastic substrate with a protrusion or depression on the outer periphery and having a basic shape of a square shape, and a predetermined wiring pattern (for example, made of copper) is formed on the surface thereof. (Not shown) is formed. Further, the first light emitting element 11 on the upper surface, the second light emitting element 15 smaller than the first light emitting element 11 and disposed in front of the first light emitting element 11, and the first light emitting element 11 Each of the protective elements disposed behind the two is mounted. At least two through holes 12a are formed inside the wiring substrate 12 and at a position deviated in one side direction, and a wiring pattern is also formed on the outer periphery of the through hole 12a. The connection terminal 16 is inserted into the two through holes 12a from the mounting surface of the light emitting element 11, and the tip thereof protrudes to the back side.

  The connection terminal 16 is formed in a pin shape with a flat head at one end, and is formed of, for example, copper, iron, and the outermost surface is gold or silver. By inserting the connection terminal 16 into each through hole 12a, the wiring pattern formed on the outer peripheral portion of the through hole 12a is electrically connected to the head of the connection terminal 16, and further, the wiring pattern and the wire (see FIG. The first light emitting element 11, the second light emitting element 15, and the positive and negative electrodes of the protection element are electrically connected to each other via a not-shown). The connection terminal 16 is fixed or connected to the wiring board 12 with solder or an adhesive.

The light emitting elements 11 and 15 are, for example, LEDs that emit white light, and the protection element is, for example, a Zener diode.
As shown in FIGS. 1 and 2, the support member 14 is made of plastic, has one end extending in the longitudinal direction so as to constitute the needle portion of the pointer, and the other end is In order to mount the wiring board 12, it has a terrace shape. Note that a part of the terrace-shaped portion protrudes to the other end side. Thus, the support member 14 supports the wiring substrate 12 such that a part of the side where the through hole 12a is formed protrudes from the support member 14 on the terrace-shaped portion. Accordingly, the connection terminal 16 of the wiring board 12 is arranged so as to protrude from the back surface side without penetrating the support member 14.

At least two conductor wirings 13 are mounted on the support member 14 corresponding to the positive and negative electrodes of the light emitting element 11 and the like. As shown in FIG. 4, each conductor wiring 13 is a plate-shaped body having a quadrangular basic shape in which two types of protrusions are formed, and one protrusion 13 a protrudes from the other end of the support member 14. , Formed in an elongated shape. The other protrusion 13b is formed in an elongated shape and bent so as to protrude to the back side of the support member 14 on the opposite side of the elongated protrusion.
Further, as shown in FIG. 3, at least two terminal receivers 17 are combined with the support member 14. The terminal receiver 17 is a substantially rectangular parallelepiped, and has an upper surface formed with a hole 17a into which the connection terminal 16 is inserted so as to coincide with the outer shape of the connection terminal 16 protruding from the back surface side of the support member 14. A hole 17b into which the conductor wiring 13 is inserted is formed on the side surface so as to match the outer shape of the protruding portion of the elongated conductor wiring 13 protruding from the other end of the support member 14. These holes 17a and 17b are connected to each other inside them, and a conductive material is housed inside them. As a result, as shown in FIG. 4, the connection terminals 16 are inserted into the respective terminal receivers 17 by, for example, a simple fitting of inserting the connection terminals 16 from the upper surface and inserting the conductor wiring 13 from the side surfaces. The light emitting element 11 and the like can be easily electrically connected to the conductor wiring 13.

  On the upper surface of the support member 14, a light guide (not shown) that guides the light of the first light emitting element 11 and the second light emitting element 15 extends from the needle-shaped portion to the first light emitting element 11 and the light emitting element 11. The second light emitting element 15 is disposed over the upper surface. The light guide is made of, for example, a resin having translucency such as acrylic resin, and has substantially the same shape as the needle shape of the support member. Although not shown in the drawings, the light guide and the support member 14 are integrally assembled by covering the ends with a cover member. Thereby, a self-luminous indicator with higher visibility can be obtained.

The light emitting device having such a configuration can be assembled as follows.
(1) Place the wiring board 12 on the support member 14;
(2) The connection terminal 16 is fixed to the wiring board 12 with, for example, solder, and protrudes from the wiring board 12.
(3) The terminal receiver 17 is combined with the support member 14, that is, the connection terminal 16 is inserted into the hole 17a of the terminal receiver 17, and the support member 14 and the connection terminal 16 are fixed. When the terminal receiver 17 is combined with the support member 14, the protruding portion 13 a of the conductor wiring 13 is inserted and fitted into the hole 17 b on the side surface of the terminal receiver 17.
Note that the assembly order of (1) to (3) may be changed depending on the shape and combination of the connection terminal and the conductor wiring.

As described above, this light-emitting device can easily manufacture a reliable electrical connection without using a heating means such as solder.
In other words, conventionally, the connection terminal and the conductor wiring are connected by solder or the like in the immediate vicinity of the resin member (for example, the support member and the wiring board), but the proximity is exposed to a local high temperature. Further, deformation / deterioration of the member itself, disconnection of a fine wiring pattern, etc. occurred. For this reason, an inspection process is required to confirm that the electrical connection between the connection terminal and the conductor wiring is well performed, and the manufacturing process is complicated. Furthermore, discarding defective products has been a cause of reducing yield.
On the other hand, the light-emitting device of the present invention can realize fixing and electrical connection only by inserting and fitting the connection terminal and the conductor wiring into a terminal receptacle in which a conductive member is previously incorporated. Therefore, the manufacturing process can be simplified and the yield can be improved.

Example 2
In the light emitting device of this embodiment, as shown in FIG. 5, the terminal receiver 27 has a substantially U-shaped columnar shape instead of a substantially rectangular parallelepiped shape, and holes 27a are formed on the upper surfaces near both ends thereof. In addition, a hole 27b is formed from one side surface, these holes 27a and 27b communicate with each other inside, and the inside thereof is made of a conductive material. Device.

Example 3
In the light emitting device of this embodiment, the connection terminal (not shown) is formed integrally with the wiring board on the same plane as the plane on which the wiring board extends, and protrudes to the other end side of the wiring board and the support member. And as shown in FIG. 6, the terminal receptacle 37 is a substantially rectangular parallelepiped, and at least two holes 37a and 37b are arranged vertically on the side surface thereof, and the holes 37a and 37b communicate with each other and are made of a conductive material. The light-emitting device has the same configuration as that of Example 1 except that it is internally provided.
In the terminal receiver 37 having such a configuration, the wiring board from which the connection terminal protrudes is placed on the support member, and the terminal receiver is combined with the support member. That is, the connection terminal and the conductor wiring are simultaneously connected to the terminal receiver 37. By inserting and fixing in the holes 37a and 37b, both can be easily and reliably electrically connected.

  The light-emitting device of the present invention can be used not only as an indicator for automobiles but also as an indicator for various meters.

It is a schematic assembly drawing of the principal part for demonstrating the structure of the light-emitting device of this invention. It is an expanded sectional view of the principal part for demonstrating the structure of the light-emitting device of this invention. It is a schematic perspective view for demonstrating the structure of the terminal receptacle in the light-emitting device of this invention. It is a schematic perspective view for demonstrating fitting to the terminal receptacle in the light-emitting device of this invention. It is a schematic perspective view for demonstrating the structure of another terminal receiver in the light-emitting device of this invention. It is a schematic perspective view for demonstrating the structure of another terminal receiver in the light-emitting device of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Light emitting device 11 1st light emitting element 12 Wiring board 12a Through-hole 13 Conductor wiring 13a, 13b Protrusion part 14 Support member 15 2nd light emitting element 16 Connection terminal 17, 27, 37 Terminal receptacle 17a, 17b, 27a, 27b, 37a, 37b hole

Claims (8)

A light-emitting device comprising: a wiring board on which a light-emitting element is mounted; a light guide that guides light from the light-emitting element; and a support member that mounts the wiring board and the light guide.
The wiring board has a protruding portion of a connection terminal that is electrically connected to the light emitting element,
The support member includes a terminal receiver having a hole that fits into the protruding portion of the connection terminal and is provided with a conductor wiring, and the conductor wiring is electrically connected to the connection terminal via the terminal receiver. A light emitting device characterized by being connected.   The light emitting device according to claim 1, wherein the protruding portion of the connection terminal is provided by a pin inserted through a hole penetrating in the thickness direction of the wiring board.   A self-light emitting indicator comprising the light emitting device according to claim 1. A wiring board on which a light emitting element is mounted;
A light guide that guides light from the light emitting element;
A support member on which the wiring board and the light guide are placed, and a manufacturing method of a light emitting device comprising:
Placing the wiring board on which the light emitting element is mounted on a support member;
Projecting a part of the connection terminal from the back surface of the wiring board;
A method of manufacturing a light-emitting device, comprising: fitting a protruding portion of the connection terminal to a terminal receiver provided in the support member to fix the support member and the wiring board.   The manufacturing method of Claim 4 which makes a part of connection terminal protrude from the back surface of the said wiring board by inserting a connecting terminal in the hole penetrated in the thickness direction of the said wiring board.   The light emitting device manufacturing method according to claim 4, wherein the connection terminal electrically connects the wiring board and the conductor wiring of the support member.   The manufacturing method according to claim 4, wherein the connection terminal is pre-soldered to the wiring board before the wiring board is placed on the support member.   The shape of the edge part of the said connection terminal is a rectangular parallelepiped, and the opening part of the rectangular parallelepiped which fits the edge part of the said connection terminal in the said terminal receptacle is formed in any one of Claims 4-7 The manufacturing method as described.

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