JP2021082712A - Display unit for electronic device - Google Patents

Abstract

To provide a display unit for an electronic device in which a chip-type light emitting element and a module substrate on which an electronic component that drives the light emitting element is mounted are housed in a tubular tube, the size of the substrate is made as large as possible, and an optical axis of light emitted from the light emitting element are aligned or substantially aligned with the central axis of a tubular tube.SOLUTION: A display unit for an electronic device includes a module substrate 200 housed inside a tubular tube 100 having a light irradiation port 120, the module substrate 200 includes an elongated thin plate-shaped flexible substrate 210, and a chip-type light emitting element (LED) 230 mounted in the middle of the flexible substrate 210 in the longitudinal direction, and the flexible substrate 210 is housed in the tubular tube 100 so as to be bent in a U-shape or substantially a U-shape with a point where the light emitting element 230 is mounted as a bent portion such that the optical axis of the light emitted by the light emitting element 230 matches with or substantially matches with the center axis Ox1 of the tubular tube 100.SELECTED DRAWING: Figure 1

Description

The present invention relates to a display unit for an electronic device.

A display unit for an electronic device (hereinafter, may be simply referred to as a "display unit") is incorporated in many electronic devices to display the operating state of the electronic device. As such a display unit, a module board in which a light emitting element and an electronic component for driving the light emitting element are mounted on the board is housed in a tubular tube (referred to as a cylindrical tube). There is.

There are various sizes of such display units depending on the size of the electronic device to be incorporated, but a smaller display unit is desired as the electronic device becomes smaller and lighter. For example, there is a great demand for a small-sized display unit in which the inner diameter of the cylindrical tube, which is the housing of the display unit, is about 4 mm to 7 mm and the length of the cylindrical tube in the central axis direction is 15 mm to 20 mm, and the size is further reduced. There is also a request for.

In such a small-sized display unit, the module substrate housed inside is also required to be smaller. Therefore, the size of the substrate, which is one of the components of the module substrate, is also required to be reduced. For example, when the planar shape of the substrate is rectangular, the length in the horizontal (width) direction (length in the radial direction of the cylindrical tube) is about 4 mm, and the length (length in the central axis direction of the cylindrical tube) is about 7 mm. In some cases, a substrate having a thickness of 1.2 mm or 1.6 mm is used. Further, in such a small-sized module substrate, most of the other electronic components including the light emitting element are chips. In this specification, the term "chip-type electronic component" refers to a type in which a plurality of terminals are provided on the electronic component body without having lead wires.

In a module substrate used for such a small-sized display unit, it is necessary to mount a plurality of electronic components including a light emitting element and an electronic component for driving the light emitting element on the small-sized substrate. Therefore, in order to effectively utilize the mounting space of the above-mentioned small-sized board, it is necessary to devise a mounting structure when mounting electronic components on the board.

Further, since a light emitting element such as an LED is oriented toward the light emitting surface, that is, is oriented in the light irradiation direction, it is necessary to attach the light emitting element to the substrate so that the direction of the light emitting surface is a predetermined direction. For example, in the case of a display unit in which a module substrate is housed in a tubular tube (referred to as a cylindrical tube), the display unit is attached to the substrate so that the light emitting surface of the light emitting element faces the light irradiation port side of the cylindrical tube. There is a need. Further, in order to eliminate the bias in the light emitted from the light irradiation port of the cylindrical tube, the light emitting element is arranged so that the optical axis of the light emitted by the light emitting element coincides with or substantially coincides with the central axis of the cylindrical tube. It is required to be mounted on a board.

On the other hand, in order to effectively utilize the space of the substrate, it is conceivable to adopt a mounting structure in which the end face of the board is used to attach electronic components to the end face. A mounting structure has been proposed in which an electronic component is attached to the end face using the end face of the substrate (see, for example, Patent Document 1).

FIG. 7 is a diagram shown for explaining the mounting structure of the electronic component described in Patent Document 1. As shown in FIG. 7, the mounting structure of the electronic component described in Patent Document 1 (in Patent Document 1, the mounting structure of the optical module is used) is an electronic component which is one of the constituent elements of the optical module 800. (Light receiving element 840) is arranged on the end surface 810a side of the substrate 810, and the terminals (two lead wires 821, 822) of the light receiving element 840 are arranged on the flat surface portion (first flat surface portion 811 and second flat surface portion) of the substrate 810. 812) It is assumed that they are aligned with each other.

Then, a circuit pattern (not shown) formed on the flat surface portions (first flat surface portion 811 and second flat surface portion 812) of the substrate 810 with the substrate 810 sandwiched between the two lead wires 821 and 822 from both sides. The structure is connected by solder 830. In the mounting structure of the electronic component described in Patent Document 1, the case where the electronic component attached to the end face of the substrate is the light receiving element 840 is shown, but instead of the light receiving element 840, the light emitting element is used as the substrate. It is also conceivable to mount it on the end face 810a of the 810.

Jikkenhei No. 5-20346

The electronic component (light receiving element 840) used in the mounting structure of the electronic component described in Patent Document 1 described above is not a chip type but an electronic component having two lead wires 821 and 822. .. As described above, in the mounting structure of the electronic component described in Patent Document 1, the light receiving element 840 as an electronic component attached to the end surface of the substrate is not a chip component, and therefore is provided in the light receiving element 840. The two lead wires 821 and 822 can be easily unfolded and bent. Therefore, it is easy to arrange the light receiving element 840, which is an electronic component, on the side of the end surface 810a of the substrate 810.

On the other hand, in a chip-type electronic component (here, a light emitting element such as an LED), there is no lead wire, so that, for example, a light emitting surface exists on one surface of the light emitting element main body. In a type of light emitting element in which terminals are provided on the surface opposite to the light emitting surface, when the terminals are solder-connected to the terminal connection pattern formed on the flat surface of the substrate, the light emitting surface of the light emitting element becomes the substrate. It will face in the direction perpendicular to the plane part of.

Therefore, in order for the light emitting surface of the light emitting element to face in the direction along the flat surface portion of the substrate, the light emitting surface of the light emitting element is oriented sideways to the flat surface portion of the substrate (the direction of the light emitting surface is parallel to the flat surface portion of the substrate). There is no choice but to install the light emitting element so that the direction is as follows. In order to mount the light emitting element horizontally on the flat surface portion of the substrate, it is conceivable to provide some auxiliary component and mount the light emitting element sideways on the auxiliary component.

Further, in the above-mentioned display unit, in order to meet the demand for miniaturization of the display unit, the size of the substrate housed in the cylindrical tube which is the housing of the display unit is also reduced, but more. In order to make it possible to mount the electronic components of the above and to mount a larger size electronic component, it is preferable that the substrate size is made as large as possible so that the mounting space on the flat surface portion of the substrate can be effectively used.

If the length of the substrate (the axial length of the cylindrical tube) is limited among the sizes of the substrate in the cylindrical tube, the lateral length of the substrate (the radial length of the cylindrical tube) It is necessary to make it larger. Here, in order to increase the lateral length of the substrate (the radial length of the cylindrical tube), it is preferable to arrange the substrate in the cylindrical tube on a plane corresponding to the inner diameter of the cylindrical tube. ..

That is, the substrate so that the central axis of the main substrate, which is parallel to the first plane portion and the second plane portion forming the front and back surfaces of the substrate and penetrates the end surface of the substrate, is coaxial or substantially coaxial with the central axis of the cylindrical tube body. Is preferably placed inside the tubular tube. By arranging the substrate in this way inside the cylindrical tube, the lateral length (also referred to as the width) of the substrate can be made to be approximately the same size as the diameter of the cylindrical tube, and the size of the substrate can be increased. It can be as large as possible.

By accommodating the substrate in the cylindrical tube in this way, it is possible to increase the size of the substrate as much as possible, but as described above, some auxiliary parts are provided on the plane of the substrate. If the LED is mounted sideways on the auxiliary component, there will be a problem that the optical axis of the light emitted by the light emitting element is largely deviated from the central axis of the cylindrical tube.

In this way, when the substrate is stored in the limited storage space inside the tubular tube, the size of the substrate should be made as large as possible, and the mounting space on the flat surface of the substrate should be effectively used. Considering that the optical axis of light is mounted so as to coincide with or substantially coincide with the central axis of the tubular tube, it can be said that the light emitting element is preferably mounted on the end surface (on the central axis) of the substrate. ..

The mounting structure of the electronic component described in Patent Document 1 described above is certainly a mounting structure in which the electronic component (light receiving element 840) is arranged on the end face of the substrate, and the central axis of the substrate 810 is a mounting structure. It can be arranged in the tubular tube so that it is coaxial or substantially coaxial with the central axis of the cylindrical tube, thereby increasing the size of the substrate as much as possible. Therefore, if the mounting structure of the electronic component described in Patent Document 1 is adopted and a light emitting element such as an LED is attached to the end surface of the substrate 810, the optical axis of the light emitted by the light emitting element is a tubular tube. It may be possible to align or nearly align with the central axis of the body.

However, in the electronic component mounting structure described in Patent Document 1, the electronic component 800 is not a chip-type electronic component, but an electronic component in which terminals 821 and 822 are lead wires, and the terminals can be arranged freely. This is possible because of the high degree, and it is difficult to arrange the chip-type electronic component on the end face of the substrate in the chip-type electronic component (light emitting element such as an LED). Therefore, in a display unit in which a chip-type light emitting element and a module board on which electronic components for driving the light emitting element are mounted are housed in a tubular tube (referred to as a cylindrical tube), the size of the board can be adjusted. It is difficult to make it as large as possible and to make the optical axis of the light emitting element coaxial or substantially coaxial with the central axis of the tubular tube.

The present invention has been made in view of the above circumstances, and is a substrate size in a display unit in which a chip-type light emitting element and a module substrate on which electronic components for driving the light emitting element are mounted are housed in a tubular tube. It is an object of the present invention to provide a display unit for an electronic device capable of making the optical axis of light emitted by a light emitting element as large as possible and making the optical axis of the light emitted by the light emitting element coincide with or substantially coincide with the central axis of the tubular tube. ..

[1] The display unit for an electronic device of the present invention is a display for an electronic device including a tubular tube having a light irradiation port at the tip and a module substrate housed inside the tubular tube. The module substrate is a unit, and the module substrate is located in the middle of the longitudinal direction of the flexible substrate so that the elongated thin plate-shaped flexible substrate and the surface opposite to the light emitting surface face the plate surface side of the flexible substrate. The flexible substrate has a chip-type light emitting element on which the light emitting element is mounted, and the flexible substrate is bent into a U shape or a substantially U shape with the portion where the light emitting element is mounted as a bent portion. It is characterized in that the optical axis of the light emitted by the element is housed in the tubular tube so as to coincide with or substantially coincide with the central axis of the tubular tube.

[2] In the display unit for electronic devices of the present invention, it is preferable that the middle portion in the longitudinal direction of the flexible substrate is the central portion in the longitudinal direction of the flexible substrate.

[3] In the display unit for electronic devices of the present invention, it is preferable that the module substrate is covered with a tube made of a material having both light transmittance and non-conductive material.

[4] In the display unit for an electronic device of the present invention, the flexible substrate has a first connection pad and a second connection pad electrically connected to the light emitting element at the longitudinal end of the flexible substrate. Each connection pad is provided, and one end of an elastic thin plate-shaped first lead piece is connected to the first connection pad, and the other end of the first lead piece has a tubular shape as an external circuit connection terminal. One end of an elongated thin plate-shaped second lead piece having elasticity is connected to the second connection pad, which protrudes outward from the rear end of the tubular body, and the other of the second lead piece. It is preferable that the end protrudes outward from the tubular tube body as an external circuit connection terminal from the rear end portion of the tubular tube body.

[5] In the display unit for an electronic device of the present invention, the first connection pad is formed at one end in the longitudinal direction of the flexible substrate, and the second connection pad is formed in the longitudinal direction of the flexible substrate. It is preferably formed at the other end of the.

[6] In the display unit for an electronic device of the present invention, the display unit is attached to the rear end portion of the tubular tube body opposite to the light irradiation port, and is opposite to the light irradiation port of the tubular tube body. A tubular base cap whose central axis is coaxial with the central axis of the tubular tube when attached to the rear end of the side is further provided, and the base cap has a closed end surface on one end side. A first slit through which the external circuit connection terminal of the first lead piece can penetrate and a second slit through which the external circuit connection terminal of the second lead piece can penetrate are formed on the closed end surface. , The first slit is formed so as to be equidistant from the central axis and parallel to each other with the central axis in between, and the end face shape of the first slit is the first lead piece. It has the same shape as the end face shape of the external circuit connection terminal of the above, and the end face size of the first slit has a size slightly larger than the end face size of the external circuit connection terminal of the first lead piece. The end face shape of the second slit of the second slit has the same shape as the end face shape of the external circuit connection terminal of the second lead piece, and the end face size of the second slit is the shape of the second lead piece. It is preferable to have a size slightly larger than the end face size of the external circuit connection terminal.

[7] In the display unit for electronic devices of the present invention, the first slit and the second slit have a virtual straight line connecting the centers of the first slit and the second slit in the longitudinal direction. It is preferable that the first slit and the second slit are formed on the closed end surface so as to be orthogonal to each of the longitudinal sides and pass through the central axis of the base cap.

[8] In the display unit for an electronic device of the present invention, the external circuit connection terminal of the first lead piece is in a state where the external circuit connection terminal of the first lead piece penetrates the first slit. A front-rear movement restricting unit for restricting the movement of the first lead piece in the front-rear direction along the central axis of the base cap is provided, and the second lead piece is connected to the external circuit. The terminal is such that when the external circuit connection terminal of the second lead piece penetrates the second slit, the second lead piece moves in the front-rear direction along the central axis of the base cap. It is preferable that a movement regulation unit in the front-rear direction is provided to regulate the movement.

[9] In the display unit for an electronic device of the present invention, a light transmitting member that transmits light emitted by the light emitting element is provided at the light irradiation port of the tubular tube, and the light transmitting member of the light transmitting member. It is preferable that the surface facing the light emitting element is provided with a recess into which the light emitting element can be fitted.

[10] In the display unit for electronic devices of the present invention, the light transmitting member is preferably a lens.

According to the present invention, in a display unit in which a chip-type light emitting element and a module board on which electronic components for driving the light emitting element are mounted are housed in a tubular tube, the board size is made as large as possible. Moreover, it is possible to provide a display unit for an electronic device capable of aligning or substantially aligning the optical axis of the light emitted by the light emitting element with the central axis of the tubular tube.

It is a figure which shows for demonstrating the display unit 10A for the electronic device which concerns on Embodiment 1. FIG. It is a figure which shows for demonstrating the module substrate 200 used for the display unit 10A for an electronic device which concerns on Embodiment 1. FIG. It is a perspective view which shows the base cap 300 taken out from a tubular tube body 100. It is a figure explaining the process of incorporating a module substrate 200 and a base cap 300 into a tubular tube body 100. It is a figure which shows for demonstrating the display unit 10B for the electronic device which concerns on Embodiment 2. It is a figure which shows for demonstrating the display unit 10C for an electronic device which concerns on Embodiment 3. It is a figure which shows for demonstrating the mounting structure of the electronic component described in Patent Document 1.

Hereinafter, each embodiment of the present invention will be described. In each embodiment of the present invention shown below, it is assumed that the light emitting element is a chip type LED. Further, it is assumed that the tubular tube body is a cylindrical tube body.

[Embodiment 1]
FIG. 1 is a diagram shown for explaining the display unit 10A for an electronic device according to the first embodiment. Note that FIG. 1A is an external perspective view of the display unit 10A for an electronic device. Further, FIG. 1B is a diagram showing an internal configuration of the display unit 10A for electronic devices shown in FIG. 1A, and the central axis Ox1 of the display unit 10A for electronic devices shown in FIG. 1A is shown. It is an enlarged sectional view cut along the central axis Ox1) of a tubular tube body 100. Further, FIG. 1 (c) is a view of the display unit 10A for electronic devices shown in FIGS. 1 (a) and 1 (b) as viewed along the central axis Ox1 in the direction of the arrow x.

FIG. 2 is a diagram shown for explaining the module substrate 200 used in the display unit 10A for the electronic device according to the first embodiment. Note that FIG. 2A is a plan view of the module substrate 200, and FIG. 2B is a U-shaped bending of the flexible substrate 210, which is one of the components of the module substrate 200 shown in FIG. 2A. It is a figure which shows the state which was done. Although FIG. 2B shows an example in which the flexible substrate 210 is bent into a U shape, the shape is not limited to the U shape itself, and the shape is close to the U shape ( It may be substantially U-shaped).

Hereinafter, the display unit 10A for an electronic device according to the first embodiment will be described with reference to FIGS. 1 and 2. It is assumed that the display unit 10A for an electronic device is used by being incorporated in an electronic device (not shown), and represents an operating state of the electronic device by turning on (including blinking) or turning off the LED. In the following description, the "display unit for electronic devices" may be simply abbreviated as "display unit".

As shown in FIG. 1, the display unit 10A includes a tubular tube 100 having a light irradiation port 120 at its tip, and a module substrate 200 (FIG. 1 (b) and) housed inside the tubular tube 100. (See FIG. 2) and a base cap 300 attached to the rear end of the tubular tube 100.

The tubular tube body 100 has a body portion 110 and a tip head portion 130 whose tip portion serves as a light irradiation port 120, and a light transmitting member (lens 140 is used) inside the tip head portion 130. ) Is provided (see FIG. 1 (b)). The details of the module substrate 200 and the base cap 300 will be described later. Further, the module substrate 200 is covered with a tube 220 made of a material having both light transmittance and non-conductivity, which will also be described later.

In the display unit 10A for electronic devices according to the first embodiment, the outer diameter Φ1 of the body portion 110 of the tubular tube body 100 is about 6 mm to 10 mm, and the inner diameter Φ2 of the body portion 110 is about 4 mm to 8 mm. Further, it is assumed that the length L1 of the body portion 110 (length along the central axis Ox1) L1 of the tubular tube body 100 is about 15 mm to 30 mm. However, these dimensions are an example, and it is possible to make the size smaller, and conversely, it is possible to make the size larger.

Subsequently, the module substrate 200 will be described mainly with reference to FIG. In FIG. 2 (b) of FIGS. 2 (a) and 2 (b), the module substrate 200 is coated with a tube 220 made of a material having both light transmittance and non-conductivity. Although the state is shown, the tube 220 is not shown in FIG. 2A.

The module substrate 200 is an elastic and bendable elongated thin plate-shaped flexible substrate 210, an LED 230 mounted in the middle of the flexible substrate 210 in the longitudinal direction, and an electronic component other than the LED 230 (for example, the LED 230). Electronic components 241,242 necessary for driving), the first connection pad 251 formed at one end of the flexible substrate 210 in the longitudinal direction, and the other end of the flexible substrate 210 in the longitudinal direction. The formed second connection pad 252, the elastic thin plate-shaped first lead piece 271 connected to the first connection pad 251 by "solder 260", and the second connection pad 252 "solder 260". It has an elongated thin plate-shaped second lead piece 272 having elasticity connected by. The LED 230 is mounted on the flexible substrate 210 so that the surface opposite to the light emitting surface 231 faces the plate surface (first plane 211) of the flexible substrate 210.

In the display unit 10A for electronic devices according to the first embodiment, the LED 230, the electronic components 241, 242, the first connection pad 251 and the second connection pad 251 have the same plane (first plane 211) on the plate surface of the flexible substrate 210. It shall be provided above. Further, one terminal (not shown) of the LED 230, the electronic component 241 and the first connection pad 251 are each connected by a wiring pattern 281 formed on the first plane 211 of the flexible substrate 210, and the LED 230 is connected. The other terminal (not shown), the electronic component 242, and the first connection pad 252 are connected to each other by a wiring pattern 282 formed on the first plane 211 of the flexible substrate 210.

Further, the first lead piece 271 extends from the first connection pad 251 of the flexible substrate 210 in the outward direction (right direction in FIG. 2A) of the flexible substrate 210, and the tip side in the extending direction has a thin plate shape. It is an external circuit connection terminal 271a. On the other hand, the second lead piece 272 extends from the second connection pad 252 of the flexible substrate 210 in the outward direction of the flexible substrate 210 (leftward in FIG. 2A), and the tip side in the extending direction has a thin plate shape. It is an external circuit connection terminal 272a.

Here, it is assumed that the flexible substrate 210 has an elongated rectangular shape in a planar shape. Then, the length L2 in the longitudinal direction (long side) of the flexible substrate 210 (see FIG. 2 (a)), that is, the length L2 in the longitudinal direction (long side) of the flexible substrate 210 before bending (FIG. 2 (a)). ) Is, for example, about 20 mm when the length L1 of the body portion 110 in the tubular tubular body 100 is about 20 mm. However, the length is not limited to about 20 mm, and can be set to a predetermined length depending on the length of the tubular tube 100 (length L1 of the body portion 110), the number of electronic components to be mounted, and the like. Further, the length L3 of the short side of the flexible substrate 210 is set to about 5 mm in this case, but the length L3 of the short side of the flexible substrate 210 is also determined by the inner diameter Φ2 of the body portion 110 of the tubular tube body 100. It can be set to a predetermined length.

By the way, as described above, the LED 230 is said to be mounted in the middle portion in the longitudinal direction of the flexible substrate 210, but the "midway portion in the longitudinal direction of the flexible substrate 210" is the electronic device according to the first embodiment. In the display unit 10A for use, it is assumed that the flexible substrate 210 is the central portion in the longitudinal direction (position halved of the length L1 of the long side) shown in FIG. 2A. Further, the LED 230 is mounted in the central portion in the short side direction (position of 1/2 of the length L3 of the short side) in the short side direction of the flexible substrate 210.

That is, the LED 230 is mounted at the position of the center Po on the plane (first plane 211) of the flexible substrate 210 having a rectangular plane shape, and the optical axis of the light emitted from the light emitting surface 231 of the LED 230 is The direction (direction along the z-axis) orthogonal to the first plane 211 (see FIG. 2A) of the flexible substrate 210 at the center Po. This also applies to other embodiments described later. The "light emitted from the light emitting surface 231 of the LED 230" may be abbreviated as "light emitted by the LED 230".

The module substrate 200 configured in this way is used by bending the flexible substrate 210 into a U shape with the portion where the LED 230 is mounted as a bent portion (see FIG. 2B). In this way, when the flexible substrate 210 is bent in a U shape with the portion where the LED 230 is mounted as a bent portion, the LED 230 is located at the bent portion (apex) of the flexible substrate 210 bent in the U shape. It becomes.

Further, since the flexible substrate 210 is bent in a U shape, the first lead piece 271 and the second lead piece 272 are in the same direction from the first connection pad 251 and the second connection pad 252 of the flexible substrate 210, respectively. (In FIG. 2B, it extends to the right).

By the way, as a mounting method when mounting the LED 230 on the flexible substrate 210, when the planar shape of the LED 230 is rectangular, the long side of the LED having a rectangular planar shape is orthogonal to the long side of the flexible substrate 210. That is, it is preferable to mount the flexible substrate 210 so as to be parallel to the short side of the flexible substrate 210.

This is because in the case of a rectangular LED 230, the long side of the LED 230 is mounted on the flexible board 210 so as to be orthogonal to the long side of the flexible board 210, and the long side of the rectangular LED 230 is the short side of the flexible board 210. Compared with the case where the flexible substrate 210 is mounted so as to be orthogonal to the flexible substrate 210, the flexible substrate 210 is mounted on the flexible substrate so that the long side of the LED 230 is orthogonal to the long side of the flexible substrate 210. This is because it was confirmed at the stage of making a trial that the flexible substrate 210 is less likely to crack when the flexible substrate 210 is bent as a bent portion as shown in FIG. 2B.

Further, as described above, the module substrate 200 is covered with a tube 220 made of a material having both light transmittance and non-conductivity. Specifically, the flexible substrate 210, the LED 230, the electronic components 241,242, the first connection pad 251 and the second connection pad 252, the solder 260, the first lead piece 271 and the second lead piece 272 that form the module board 200 are , Covered by a tube 220 made of a light-transmitting and non-conductive material (see FIGS. 1 (b) and 2 (b)). Since the transparent tube 220 made of a material having both light transmission and non-conductivity can transmit light, as shown in FIGS. 1 (b) and 2 (b), the light emitting surface 231 of the LED 230 Can also be coated with the tube 220. Regarding the first lead piece 271 and the second lead piece 272, the external circuit connection terminals 271a and 272a are covered with the tube 220 so as to be exposed.

Here, "having light transmission" may be colorless and transparent, or may be colored and transparent (semi-transparent), but here, it is assumed that it is colorless and transparent. Further, as the tube 220 made of a material having both light transmittance and non-conductive property, it is preferable to use a heat-shrinkable tube that shrinks by applying heat. Hereinafter, the tube 220 made of a material having both light transmittance and non-conductive property may be referred to as "non-conductive transparent tube 220".

As described above, since the module substrate 200 is covered with the non-conductive transparent tube 220, the module substrate 200 and the tubular tube 100 are formed even when the tubular tube 100 is made of a conductive member such as metal. In addition to maintaining the insulation between the two and, the insulation between the electronic components mounted on the flexible substrate 210 and the insulation between the first lead piece 271 and the second lead piece 271 can also be maintained. can get.

Further, in the completed state as the display unit (see FIG. 1A), the tubular tube 110 may be charged with static electricity, and the charged static electricity discharge spark causes the electronic components 241 other than the LED 230 and the LED 230. , 242, etc. may be destroyed. Therefore, a withstand voltage test is performed assuming an electrostatic discharge spark, but since the module substrate 200 is covered with a non-conductive transparent tube 220, when such a withstand voltage test is performed, other than the LED 230 and the LED 230. It is possible to reliably prevent the electronic components 241,242 and the like from being destroyed. In particular, since the entire LED 230 including the light emitting surface 230a is covered with the non-conductive transparent tube 220, it is possible to reliably prevent the LED 230 from being destroyed by the withstand voltage test. As a result, it is possible to reliably prevent the completed display unit from being rejected in the pressure resistance test.

Such a pressure resistance test is an important test for maintaining the quality of a product. In particular, when the inner diameter Φ2 of the tubular tube 110 (see FIG. 1B) is small, the distance between the inner wall surface of the tubular tube 110 and the module substrate 200 becomes narrow, so that the tubular tube 110 is narrow. The effect of the electrostatic discharge spark charged on the 110 on the module substrate 200 becomes greater. Therefore, the effect that the entire electronic components 241,242 other than the LED 230 and the LED 2300 are covered with the non-conductive transparent tube 220 is great.

The entire LED 230 including the light emitting surface 231 of the LED 230 can be covered because the non-conductive transparent tube 220 has light transmission, thereby eliminating the exposed portion of the LED 230. Can be done.

By the way, when the non-conductive transparent tube 220 is coated on the module substrate 200, the long non-conductive transparent tube is cut so as to have a length suitable for the length of the module substrate 200 to be coated. In one opening of the non-conductive transparent tube 220 having a length suitable for the length of the module substrate 200, one end side of the module substrate 200 shown in FIG. 2 (for example, the outside of the first lead piece 271). The circuit connection terminal 271a side) may be inserted. In this case, the flexible substrate 210 on which the LED 230 and electronic components 241, 242 other than the LED 230 are mounted, and the first lead piece 271 and the second lead piece 272 connected to the flexible substrate 210 are non-conductive and transparent. It can be coated with a tube 220.

Then, the flexible substrate 210 on which the LED 230 and electronic components 241, 242 other than the LED 230 are mounted, and the first lead piece 271 and the second lead piece 272 connected to the flexible substrate 210 are formed into a non-conductive transparent tube. The one coated with 220 is heated. As a result, the non-conductive transparent tube contracts, and as shown in FIGS. 1B and 2B, the flexible substrate 210, LED231, electronic components 241,242, first lead piece 271 and second lead It is deformed along the unevenness of the outer shape of the piece 272 or the like.

When the non-conductive transparent tube 220 is coated on the module substrate 200, the non-conductive transparent tube 220 is simply inserted into one opening of the non-conductive transparent tube 220 by inserting one end side of the module substrate 200. The transparent tube 220 can be coated on the module substrate 200, which is the non-conductive transparent tube 220 having light transmission, and the non-conductive transparent tube 220 is also provided to the light emitting surface 231 of the LED 230. This is because it can be coated.

Next, the base cap 300 will be described with reference to FIGS. 1 and 3.
FIG. 3 is a perspective view showing the base cap 300 taken out from the tubular tube body 100. 3 (a) is an external perspective view, FIG. 3 (b) is an end view of FIG. 3 (a) in the x direction, and FIG. 3 (c) is a view of FIG. 3 (a) in the x'direction. It is a seen end view.

The base cap 300 is made of a non-conductive material such as synthetic resin, has a tubular shape (a tubular shape having a circular cross section) as shown in FIGS. 1 and 3, and is behind the tubular tubular body 100. It can be attached to an end portion (rear end portion of the body portion 110). Specifically, the base cap 300 includes a small diameter portion 310 having an outer diameter Φ3 slightly smaller than the inner diameter Φ2 of the body portion 110 in the tubular tube body 100, and an outer diameter Φ1 of the body portion 110 in the tubular tube body 100. It has a large diameter portion 320 having the same or substantially the same outer diameter Φ4, and a step portion 330 is formed at a boundary portion between the small diameter portion 310 and the large diameter portion 320. Therefore, in the base cap 300, the small diameter portion 310 can be inserted into the body portion 110 of the tubular tube body 100 until the step portion 330 abuts on the rear end portion of the body portion 110 of the tubular tube body 100. ..

Further, as shown in FIGS. 3 (b) and 3 (c), the base cap 300 has an end face on one end side (end face 320a on the side of the large diameter portion 320) as a closed end face. The closed end surface (hereinafter referred to as the closed end surface 320a) has a first slit 321 through which the external circuit connection terminal 271a of the first lead piece 271 can penetrate and an external circuit connection terminal 272a of the second lead piece 272. A second slit 322 through which the base cap 300 can penetrate is formed so as to sandwich the central axis Ox2 of the base cap 300. The first slit 321 and the second slit 322 are formed so as to be at equal intervals and parallel to each other with the central axis Ox2 of the base cap 300 interposed therebetween.

Then, on the outer wall surface (outer wall surface) of the closed end surface 320a, as shown in FIG. 3B, between the first slit 321 and the second slit 322 and along the radial direction of the base cap 300. A thin plate-shaped external separator 341 is provided on the vertical line (on the line passing through the central axis Ox2) so as to project outward (see FIG. 3A). Further, on the inner wall surface (inner wall surface) of the closed end surface 320a, as shown in FIG. 3C, between the first slit 321 and the second slit 322 and along the radial direction of the base cap 300. A thin plate-shaped internal separator 342 is provided on the vertical line (on the line passing through the central axis Ox2) so as to project inward (see FIG. 3A).

When the base cap 300 is viewed in the x direction, the first slit 321 and the second slit 322 and the external separate 341 are arranged in parallel (see FIG. 3B). Further, when the base cap 300 is viewed in the x'direction, the first slit 321 and the second slit 322 and the internal separate 342 are arranged in parallel with each other (see FIG. 3C).

Then, as shown in FIG. 3B, the interval d1 from the first slit 321 to the central axis Ox2 and the interval d2 from the second slit 322 to the central axis Ox2 are equal intervals (d1 = d2). The distance (d1 + d2) from the first slit 321 to the second slit 322 across the central axis Ox2 is the distance d3 between both ends of the flexible substrate 210 bent in a U shape (see FIG. 2B). ) Is preferably set to be approximately equal. However, since each of the flexible substrate 210, the first lead piece 271 and the second lead piece 272 is an elongated thin plate-like member and has elasticity, it can be easily bent. Therefore, the distance (d1 + d2) from the first slit 321 to the second slit 322 across the central axis Ox2 and the distance d3 between both ends of the U-shaped flexible substrate 210 are set to be exactly equal. do not have to.

By the way, the external circuit connection terminal 271a of the first lead piece 271 is provided with a movement restricting unit 291 (see FIG. 2) in the front-rear direction that regulates the movement in the front-rear direction. When the external circuit connection terminal 271a of the first lead piece 271 penetrates the first slit 321, the movement restricting unit 291 in the front-rear direction causes the first lead piece 271 to be the central axis of the base cap 300. It regulates the movement in the front-back direction along Ox2.

The external circuit connection terminal 271a of the second lead piece 271 is also provided with a movement restricting unit 292 (see FIG. 2) in the front-rear direction that regulates the movement in the front-rear direction. When the external circuit connection terminal 272a of the second lead piece 272 penetrates the second slit 322, the movement restricting unit 292 in the front-rear direction causes the second lead piece 272 to be the central axis of the base cap 300. Regulates movement in the front-back direction along Ox2.

The front-rear movement restricting unit 291 provided on the external circuit connection terminal 271a of the first lead piece 271 and the front-rear movement regulation unit 292 provided on the external circuit connection terminal 272a of the second lead piece 272 are various. The configuration of can be adopted. Here, an example of the movement restricting unit 291 in the front-rear direction provided at the external circuit connection terminal 271a of the first lead piece 271 will be described.

The front-rear movement restricting portion 291 provided on the external circuit connection terminal 271a of the first lead piece 271 has a first protrusion 291a having elasticity in a direction orthogonal to the plate surface of the external circuit connection terminal 271a and the first protrusion 291a. It has a configuration having a second protrusion 291b provided on the front side (flexible substrate 210 side) of the first protrusion 291a. Then, when the external circuit connection terminal 271a of the first lead piece 271 is inserted into the first slit 321, the first protrusion 291a is first pushed down when the first protrusion 291a passes through the first slit 321. When the first protrusion 291a finishes passing through the first slit 321, the first protrusion 291a returns to the original state.

On the other hand, the second protrusion 291b abuts on the inner wall surface of the closed end surface 320a of the base cap 300, and has a role of restricting the movement of the first lead piece 271 further to the rear side. I can say. The second protrusion 291b and the first protrusion 291a described above regulate the movement of the first lead piece 271 in the front-rear direction along the central axis Ox2 of the base cap 300. If the first lead piece is slid so as to be pulled out from the first slit 321 while the second protrusion 291a is pressed by a claw or the like, the external circuit connection terminal 271a of the first lead piece 271 is pulled out from the first slit 321. be able to.

The movement restricting unit 292 in the front-rear direction provided at the external circuit connection terminal 272a of the second lead piece 272 has the same configuration. That is, on the plate surface of the external circuit connection terminal 272a of the second lead piece 272, a first protrusion 292a having elasticity in a direction orthogonal to the plate surface of the connection terminal 272a and a front side (front side) of the first protrusion 292a ( It has a configuration having a second protrusion 292b provided on the flexible substrate 210 side). The first protrusion 292a and the second protrusion 292b function in the same manner as the first protrusion 291a and the second protrusion 291b provided at the external circuit connection terminal 271a of the first lead piece 271.

Further, the end face shape of the first slit 321 has the same shape as the end face shape of the external circuit connection terminal 271a of the first lead piece 271, and the end face size of the first slit 321, that is, the vertical along the z-axis. The length a1 in the direction and the length a2 in the lateral direction along the y-axis (length a2 of the side in the longitudinal direction) are slightly larger than the end face size (thickness t and width w) of the external circuit connection terminal 271a. Have.

Further, the end face shape of the second slit 322 has the same shape as the end face shape of the external circuit connection terminal 272a of the second lead piece 271, and the end face size of the second slit 322, that is, the vertical along the z-axis. The length a1 in the direction and the length a2 in the lateral direction along the y-axis (length a2 of the side in the longitudinal direction) are slightly larger than the end face size (thickness t and width w) of the external circuit connection terminal 272a. Have.

The first slit 321 and the second slit 322 connect the centers P1 in the longitudinal direction of the first slit 321 and the second slit 322 (P1 is a position halved of the length a2 in the long side direction). A virtual straight line M (see FIG. 3B) is orthogonal to each of the longitudinal sides of the first slit 321 and the second slit 322, and passes through the central axis Ox2 of the base cap 300. It is formed on the closed end face 320a.

Therefore, the external circuit connection terminal 271a of the first lead piece 271 and the external circuit connection terminal 272a of the second lead piece 272 are formed in the closed end surface 320a of the base cap 300 in the first slit 321 and the second slit 322, respectively. Assuming that they are penetrated, the first lead piece 271 and the second lead piece 272 move in the first slit 321 and the second slit 322 in the direction orthogonal to the central axis Ox2 of the base cap 300, and the base cap. The movement around the central axis Ox2 of 300 is regulated.

As described above, the first slit 321 and the second slit 322 support the first lead piece 271 and the second lead piece 272 at a predetermined interval (in this case, the interval d3), and also the first lead piece 271. And the regulation that regulates the movement of the second lead piece 272 in the first slit 321 and the second slit 322 in the direction orthogonal to the central axis Ox2 of the base cap 300 and the movement around the central axis Ox2 of the base cap 300. It also serves as a club.

By the way, when the first lead piece 271 and the second lead piece 272 penetrate the first slit 321 and the second slit 322 of the base cap 300, a part of the external circuit connection terminal 271a of the first lead piece 271 (A region on the rear end side of the first protrusion 291a) and a part of the external circuit connection terminal 272a of the second lead piece 272 (region on the rear end side of the first protrusion 292a) are the base cap 300. (See, for example, FIG. 1 (b)). As a result, the external circuit connection terminal 271a of the first lead piece 271 and the external circuit connection terminal 272a of the second lead piece 272 are connected to the external circuit (the electricity of the electronic device on which the display unit 10A for the electronic device according to the first embodiment is mounted). It is possible to connect to the circuit).

By incorporating the module substrate 200 described in FIG. 2 and the base cap 300 described in FIG. 3 into the tubular tube body 100, the display unit for the electronic device according to the first embodiment can be configured. Here, a step of incorporating the module substrate 200 and the base cap 300 into the tubular tube body 100 will be described.

FIG. 4 is a diagram illustrating a step of incorporating the module substrate 200 and the base cap 300 into the tubular tube body 100. In FIG. 4, some of the symbols described in FIGS. 1 to 3 are omitted. First, the flexible substrate 210 is bent into a U shape. Specifically, the LED 230 is a flexible substrate 210 on which the LED 230 and the electronic components 241, 242 are mounted, the first lead piece 271 and the second lead piece 272 are connected, and the flexible substrate 210 is covered with the non-conductive transparent tube 220. Is bent in a U shape with the portion where is mounted as a bent portion (see FIG. 4 (a)). Note that FIG. 4A is in the same state as in FIG. 2B.

Subsequently, the external circuit connection terminal 271a of the first lead piece 271 connected to the flexible substrate 210 bent in a U shape is inserted into the first slit 321 formed in the base cap 300 to penetrate the flexible substrate 210. The external circuit connection terminal 272a of the second lead piece 272 connected to the substrate 210 is inserted into the second slit 322 formed in the base cap 300 and penetrated. As a result, a part of the external circuit connection terminal 271a of the first lead piece 271 (the area on the rear end side of the first protrusion 291a) and a part of the external circuit connection terminal 272a of the second lead piece 272, respectively. A region (a region on the rear end side of the first protrusion 292a) projects rearward from the base cap 300 (see FIG. 4B).

In this way, the external circuit connection terminal 271a of the first lead piece 271 connected to one end in the longitudinal direction of the flexible substrate 210 bent in a U shape is inserted into the first slit 321 and penetrates therethrough. , The external circuit connection terminal 272a of the second lead piece 272 connected to the other end in the longitudinal direction of the flexible substrate 210 is inserted into the second slit 322 and penetrates, so that it is bent into a U shape. The flexible substrate 210 is supported by the base cap 300 in a stable state.

In the state shown in FIG. 4B, the movement of the first lead piece 271 and the second lead piece 272 in the front-rear direction along the central axis Ox2 of the base cap 300 is restricted, and the first slit 321 and the first slit 321 and the second lead piece 272 are restricted. In the two slits 322, the movement in the direction orthogonal to the central axis Ox2 of the base cap 300 and the movement around the central axis Ox2 of the base cap 300 are regulated.

As shown in FIG. 4B, when the first lead piece 271 and the second lead piece 272 are attached to the base cap 300, the one in the state shown in FIG. 4B is stored in the tubular tube body 100. Specifically, as shown in FIG. 4C, the LED 230 mounted on the flexible substrate 210 is inserted at the head from the rear end side of the body portion 110 of the tubular tube body 100, and the small diameter of the base cap 300 is small. The step portion 330 formed at the boundary between the portion 310 and the large diameter portion 320 is inserted until it comes into contact with the rear end portion of the body portion 110 of the tubular tubular body 100. At this time, an adhesive is applied to the outer peripheral surface of the small diameter portion 310 of the base cap 300. As a result, the base cap 300 is fixed to the tubular tube body 100. In the state where the base cap 300 is fixed to the tubular tube body 100, the central axis Ox1 of the tubular tube body 100 (see FIG. 1) and the central axis Ox2 of the base cap 300 (see FIG. 3) are It becomes coaxial.

By carrying out the steps shown in FIGS. 4 (a) to 4 (c) described above, the display unit 10A (see FIG. 1) for the electronic device according to the first embodiment can be configured. In the display unit 10A for electronic devices according to the first embodiment, the LED 230 is located at a bent portion of a flexible substrate 210 that is bent in a U shape. Therefore, the light emitting surface 231 of the LED 230 faces the light irradiation port 120 of the tubular tube body 100, and the optical axis of the light emitted by the LED 230 coincides with or substantially coincides with the central axis Ox1 of the tubular tube body 100. Will be.

Further, it is assumed that the lens 140 is provided on the tubular tube body 100 so that the optical axis of the lens 140 is coaxial with the central axis Ox1 of the tubular tube body 100. Therefore, if the optical axis of the light emitted by the LED 230 coincides with or substantially coincides with the central axis Ox1 of the tubular tube body 100, the optical axis of the light emitted by the LED 230 coincides with or substantially coincides with the optical axis of the lens 140. .. As described above, the optical axis of the light emitted by the LED 230 coincides with or substantially coincides with the central axis Ox1 of the tubular tube body 100 for the following reasons.

That is, the external circuit connection terminal 271a of the first lead piece 271 connected to the first connection pad 251 of the flexible substrate 210 bent in a U shape is inserted into the first slit 321 of the base cap 300. The external circuit connection terminal 272a of the second lead piece 272 connected to the second connection pad 252 of the flexible substrate 210 is inserted into the second slit 322 of the base cap 300. Here, the first slit 321 and the second slit 322 are formed so as to sandwich the central axis Ox2 of the base cap 300 at equal intervals from the central axis Ox2 and to be parallel to each other. Further, in the first slit 321 and the second slit 322, a virtual straight line M connecting the centers P1 in the longitudinal direction of the first slit 321 and the second slit 322 is formed by the first slit 321 and the second slit 322. It is formed on the closed end surface 320a so as to be orthogonal to the side in the longitudinal direction of the base cap 300 and to pass through the center (central axis Ox2) of the base cap 300. The central axis Ox2 of the base cap 300 is coaxial with the central axis Ox1 of the tubular tube body 100.

For this reason, the external circuit connection terminal 271a of the first lead piece 271 is inserted into the first slit 321 and the external circuit connection terminal 272a of the second lead piece 272 is inserted into the second slit 322. The optical axis of the light emitted by the LED 230 coincides with or substantially coincides with the central axis Ox1 (optical axis of the lens 140) of the tubular tube body 100.

As described above, in the display unit 10A for the electronic device according to the first embodiment, the LED 230 is mounted on the flexible board 210 in which the LED 230 is mounted in the central portion in the longitudinal direction of the elongated thin plate-shaped flexible board 210. A configuration in which the optical axis of the light emitted by the LED 230 is housed in the tubular tube 100 so as to coincide with or substantially coincide with the central axis Ox1 of the tubular tube 100 in a state of being bent in a U shape with the portion bent as a bent portion. It has become.

Since the flexible substrate 210 is bent in a U shape in this way, the length of the flexible substrate 210 before bending is set to be longer than the length along the central axis Ox1 of the tubular tube body 100. It is also possible. Therefore, the size of the flexible substrate 210 can be increased as much as possible, and the mounting area can be increased. Thereby, many electronic components can be mounted. Further, by utilizing both the front surface and the back surface of the flexible substrate 210, more electronic components can be mounted. Further, according to the display unit 10A for an electronic device according to the first embodiment, the optical axis of the light emitted by the LED 230 is centered on the tubular tube body 100 without attaching a chip-type LED to the end face of the substrate. It is possible to match or almost match the axis Ox1.

Further, since the LED 230 is mounted in the central portion of the flexible substrate 210 in the longitudinal direction, the flexible substrate 210 bent in a U shape can be seen from the position where the LED 230 is mounted, as shown in FIG. 2 (b). The lengths up to both ends (first connection pad 251 and second connection pad 252) can be made equal. Therefore, the first lead piece 271 and the second lead piece 272 can have the same length, and the first lead piece 271 and the second lead piece 272 can have the same parts. As a result, the parts management of the first lead piece 271 and the second lead piece 272 become easy, and the connection pads (first connection pad 251 and second connection) corresponding to the first lead piece 271 and the second lead piece 272, respectively, are facilitated. When connecting to the pad 252), it is not necessary to distinguish between the first lead piece 271 and the second lead piece 2712, so that the connection process can be facilitated.

Further, since the step of mounting the LED 230 on the flexible substrate 210 is to mount the LED 230 on the flexible substrate 210 on the flat plate in the same manner as the mounting process of ordinary electronic components, the end face of the substrate described in the section of the prior art. The LED is easier to mount than the case where the electronic component (in this case, the LED) is mounted on the device. Therefore, the productivity of the module substrate 200 shown in FIG. 2 can be significantly improved.

Further, when the flexible substrate 210 on which the LED 230 is mounted is housed in the tubular tube 100, as described in FIG. 4, the flexible substrate 210 on which the LED 230 is mounted is bent into a U shape to form the flexible substrate 210. After inserting the external circuit connection terminal 271a of the first lead piece 271 and the external circuit connection terminal 272a of the second lead piece 272 connected to the base cap 300 into the first slit 321 and the second slit 322 of the base cap 300, respectively. By performing the step of inserting the base cap 300 into the tubular tube 100, the optical axis of the light emitted by the LED 230 can be made to coincide with or substantially coincide with the central axis Ox1 of the tubular tube 100. Therefore, the productivity when producing the display unit 10A as shown in FIG. 1 can be significantly improved.

[Embodiment 2]
FIG. 5 is a diagram shown for explaining the display unit 10B for an electronic device according to the second embodiment. Note that FIG. 5 is a diagram showing an internal configuration of the display unit 10B for electronic devices according to the second embodiment, and corresponds to FIG. 1 (b) used in the description of the display unit 10A for electronic devices according to the first embodiment. It is a figure to do. The internal configuration of the display unit 10B for the electronic device according to the second embodiment is different from the internal configuration of the display unit 10A for the electronic device according to the first embodiment, in that the LED 230 is supported in a state of being positioned by the lens 140. It is a point, and other configurations are the same as those of the display unit 10A for electronic devices according to the first embodiment. Therefore, in the display unit 10B for the electronic device according to the second embodiment, the same components as the display unit 10A for the electronic device according to the first embodiment are designated by the same reference numerals. Hereinafter, the display unit 10B for an electronic device according to the second embodiment will be specifically described.

The display unit 10B for an electronic device according to the second embodiment is provided with a recess 141 into which the LED 230 can be fitted on the inner surface of the lens 140 (the surface facing the side facing the LED 230). The recess 141 is preferably provided at a position corresponding to the optical axis of the lens 140, that is, the central axis Ox1 of the tubular tube body 100. Further, the shape and size of the recess 141 may be such that the LED 230 does not move in the recess 141 in the direction orthogonal to the central axis and around the central axis Ox1 when the LED 230 is fitted. preferable.

As described above, in the display unit 10B for electronic devices according to the second embodiment, a recess 141 into which the LED 230 can be fitted is provided on the inner surface of the lens 140. Therefore, when performing the step of storing the module substrate 200 in the tubular tube body 100 (see FIG. 3C), the LED 230 is stored so as to be fitted into the recess 141 of the lens 140. As a result, the LED 230 is supported in a state of being positioned by the recess 141 of the lens 140.

As a result, the module substrate 200 is housed in the tubular tube body 100 in a positioned and stable state. As a result, when the display unit 10B for an electronic device according to the second embodiment is mounted on the electronic device, the optical axis of the light emitted by the LED 230 is the tubular tube body 100 even if the electronic device is susceptible to vibration or the like. It is possible to maintain a state of matching or almost matching with the central axis Ox1 of the above with high accuracy. As a result, even when the electronic device is used for a long period of time, the light emitted from the light irradiation port 120 of the tubular tube 100 is less likely to be biased, and the performance as a display unit can be further improved.

[Embodiment 3]
FIG. 6 is a diagram shown for explaining the display unit 10C for an electronic device according to the third embodiment. Note that FIG. 6 is a diagram showing an internal configuration of the display unit 10C for electronic devices according to the third embodiment, and corresponds to FIG. 1 (b) used in the description of the display unit 10A for electronic devices according to the first embodiment. It is a figure to do.

The internal configuration of the display unit 10C for electronic devices according to the third embodiment is different from the internal configuration of the display unit 10A for electronic devices according to the first embodiment, in that the first lead piece 271 and the second lead piece 272 are flexible substrates. The point is that the 210 is connected to the end on the same side, and the other configurations are the same as those of the display unit 10A for electronic devices according to the first embodiment. Therefore, in the display unit 10B for the electronic device according to the second embodiment, the same components as the display unit 10A for the electronic device according to the first embodiment are designated by the same reference numerals. Hereinafter, the display unit 10C for an electronic device according to the third embodiment will be specifically described.

First, the module board 200 (hereinafter, referred to as the module board 200 according to the third embodiment) used for the display unit 10C for the electronic device according to the third embodiment will be described. As shown in FIG. 6, the module substrate 200 according to the third embodiment has the same end (one end) of the two longitudinal ends (one end and the other end) of the flexible substrate 210. A first connection pad 251 and a second connection pad 252 are provided on the side of the above.

In the module substrate 200 according to the third embodiment, the first connection pad 251 and the first connection pad 251 are used by utilizing both the front surface (referred to as the first plane 211) and the back surface (referred to as the second plane 212) of the flexible substrate 210. Two connection pads 252 are provided. That is, the first connection pad 251 is provided on the front surface (first plane 211) of the flexible substrate 210, and the second connection pad 252 is provided on the back surface (second plane 212) of the flexible substrate 210. Then, as in each of the above embodiments, the first lead piece 271 is connected to the first connection pad 251 and the second lead piece 271 is connected to the second connection pad 252 by solder 260, respectively.

In the module substrate 200 according to the third embodiment configured in this way, the first lead piece 271 and the second lead piece 272 are the same ends (one) of the first plane 211 and the second plane 212 of the flexible substrate 210. Extends from the end of the flexible substrate 210 to the outside of the flexible substrate 210. At this time, since the first lead piece 271 reaches the first slit 321 of the base cap 300 in a state of extending substantially linearly, the external circuit connection terminal 271a of the first lead piece 271 is inserted as it is. Although it can be penetrated, the second lead piece 272 will be displaced from the position of the second slit 322 if it is left in a state of extending substantially linearly.

Therefore, in the module substrate 200 according to the third embodiment, it is preferable that the second lead piece 272 is bent and used as shown in FIG. Specifically, the distance between the second lead piece 272 and the first lead piece 271 is the distance d1 + d2 between the first slit 321 and the second slit 322 formed in the base cap 300 (FIGS. 3B and 3). The second lead piece 272 is bent so as to be (see (c)). If the second lead piece 272 is bent in this way, the external circuit connection terminal 272a of the second lead piece 272 can be easily inserted into the second slit 322 of the base cap 300 and penetrated.

Since the first reed piece 271 and the second reed piece 272 have an elongated thin plate shape having elasticity, they can be easily bent. Therefore, if the distance between the first slit 321 and the second slit 3222 is not so wide, the second lead piece 272 can be bent by bending the second lead piece 272 without bending as shown in FIG. It is possible to insert the external circuit connection terminal 272a into the second slit 322.

The display unit 10C for electronic devices according to the third embodiment can also obtain the same effect as the display unit 10A for electronic devices according to the first embodiment. In the display unit 10C for electronic devices according to the third embodiment, the other end of the flexible substrate 210 (the end to which the first lead piece 271 and the second lead piece 272 are not connected) is free. However, if a support portion or the like for supporting the other end portion of the flexible substrate 210 is provided inside the body portion 110 of the tubular tubular body 100, the other end portion of the flexible substrate 210 can be stabilized.

Further, also in the display unit 10C for the electronic device according to the third embodiment, similarly to the display unit 10C for the electronic device according to the second embodiment, the lens 140 is provided with the recess 141 so that the LED 230 is fitted in the recess 141. By doing so, it is possible to obtain the same effect as the display unit 10B for the electronic device according to the second embodiment.

In the display unit 10C for electronic devices according to the third embodiment, the first connection pad 251 and the second connection are made by using the front surface (first plane 211) and the back surface (second plane 212) of the flexible substrate 210. Although the pads 252 are provided, if there is enough space on the flat surface of the flexible substrate 210, the first connection pad 251 and the second connection pad 252 are placed on the same flat surface (for example, the first flat surface 211). It may be provided side by side in a separated state.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. For example, the following modifications can be performed.

(1) In each of the above embodiments, the case where the flexible substrate 210 is bent into a U shape is illustrated, but the shape is not limited to the U shape itself, and the flexible substrate 210 is substantially U-shaped. May be good. Here, the substantially U-shape includes, for example, a shape close to a V-shape.

(2) The optical axis of the light emitted by the LED 230 is arranged so as to coincide with or substantially coincide with the central axis Ox1 of the tubular tube body 100, but this means that a slight "deviation" is allowed. There is. That is, it is ideal to arrange the light axis emitted by the LED 230 so as to coincide with the central axis Ox1 of the tubular tube body 100, but it is not used in an optical device that requires high accuracy. Allows slight deviations.

(3) The size of the tubular tube 100, the size of the flexible substrate 210, and the like illustrated in each of the above embodiments are examples and can be set as appropriate.

(4) In each of the above embodiments, the case where the tubular tube 100 is a cylindrical tube is illustrated, but the present invention is not limited to the cylindrical tube, and for example, the cross section orthogonal to the central axis is square or hexagonal. It may be a tubular tube body.

(5) In each of the above embodiments, the flexible substrate 210 illustrates the case where the planar shape of the flexible substrate 210 is rectangular, but the planar shape of the flexible substrate 210 is not limited to the rectangular shape. That is, the flexible substrate 210 may have an elongated thin plate shape, for example, a rounded shape having both ends drawing a semicircle, and a shape having a pointed tip such as a triangular apex at both ends. It may be the one that exists.

(6) As described above, the LED 230 is said to be mounted in the central portion in the longitudinal direction of the flexible substrate 210, but it does not necessarily have to be mounted in the central portion in the longitudinal direction of the flexible substrate 210 and is flexible. As long as it is in the middle of the substrate 210 in the longitudinal direction, the position may be slightly shifted toward one end. However, even if the mounting position of the LED 230 is slightly deviated toward one end in the longitudinal direction of the flexible substrate 210, the flexible substrate 210 can be bent by using the portion where the LED 230 is mounted as a bending portion. Good.

(7) In each of the above-described embodiments, the case where the number of LEDs 230 is one has been described as an example, but a plurality of LEDs 230 may be present. For example, to explain the display unit 10A for an electronic device according to the first embodiment as an example, for example, three LEDs of R (red), G (green), and B (blue) are mounted on the flexible substrate 210. May be

In this case, as a method of arranging the three LEDs, in the horizontal direction or the vertical direction (long side direction or short side direction) of the flexible board 210 on one plane (first plane 211) of the flexible board 210. They may be arranged side by side, or may be arranged so that the three LEDs are located at the vertices of an equilateral triangle. When the three LEDs are arranged side by side in the horizontal or vertical direction, it is preferable to arrange the three LEDs so that the LED located in the center coincides with the central axis Ox1 of the tubular tube body 100. .. When the three LEDs are arranged adjacent to each other so as to be at the vertices of the equilateral triangle, the three LEDs are arranged so that the center of the equilateral triangle coincides with the central axis Ox1 of the tubular tube body 100. Is preferable. By mounting the plurality of LEDs having different colors in this way, it is possible to selectively display the plurality of colors and to display a combination of the plurality of colors.

(8) In each of the above embodiments, the second protrusion 291b provided on the external circuit connection terminal 271a of the first lead piece 271 and the second protrusion provided on the external circuit connection terminal 272a of the second lead piece 272. The 292b serves to regulate the movement of the first lead piece 271 and the second lead piece 272 to the rear side, respectively, and the movement of the first lead piece 271 and the second lead piece 272 to the rear side. As shown in FIG. 2, the one that plays a role of regulating the above is not limited to the one provided as a protrusion on the plane of the external circuit connection terminal 271a and the external circuit connection terminal 272a.

For example, when the external circuit connection terminal 271a is described, a wide portion wider than the width W (see FIG. 2) of the external circuit connection terminal 271a is provided on the boundary side of the external circuit connection terminal 271a with the first lead piece 271. (The illustration is omitted) may be formed in a brim shape. Since the wide portion is formed in a brim shape, when the external circuit connection terminal 271a of the first lead piece 271 is inserted into the first slit 321 the wide portion can pass through the first slit 321 of the base cap 300. Without being able to do so, the movement of the first lead piece 271 to the rear side can be restricted. The external circuit connection terminal 272a can have the same configuration.

(9) In the second embodiment, it has been described that the light transmitting member is a lens. As described above, by using the lens as the light transmitting member, the light to be irradiated can be condensed or diffused depending on the type of the lens used, but the light does not necessarily have to be a lens. For example, it may be a light transmitting member made of colored or colorless glass or synthetic resin having light transmission. Also in this case, it is possible to provide a recess 141 into which the LED 230 can be fitted on the inner surface (the surface facing the side facing the LED 230) of the light transmitting member made of glass, synthetic resin, or the like.

10A, 10B, 10C ... Display unit (display unit for electronic devices), 100 ... Cylindrical tube, 110 ... Body, 120 ... Light irradiation port, 130 ... Head, 140 ... lens (light transmitting member), 141 ... recess, 200 ... module substrate, 210 ... flexible substrate, 211 ... first plane, 212 ... second plane, 220 ... -Non-conductive transparent tube (tube having both light transmission and non-conductivity), 230 ... LED (light emitting element), 241,242 ... Electronic components, 251 ... First connection pad, 252 ... .. 2nd connection pad, 260 ... Solder, 271 ... 1st lead piece, 271a ... External circuit connection terminal of 1st lead piece 271 ..... 2nd lead piece, 272a ... External circuit connection terminal of the second lead piece 272, 281,28 ... Wiring pattern, 291,292 ... Movement control unit, 291a, 292a ... First protrusion, 291b, 292b ... Second protrusion, 300 ... Base cap, 310 ... Small diameter part, 320 ... Large diameter part, 320a ... Closed end face, 321 ... 1st slit, 322 ... 2nd slit, 330 ... Step part , 341 ... External Separator, 342 ... Internal Separator, Ox1 ... Central Axis of Cylindrical Tube 100, Ox2 ... Central Axis of Base Cap 300, Ox3 ... Central Axis of Flexible Substrate 210, Po ... Center on the plane of the flexible substrate 210, P1 ... Center in the longitudinal direction of each of the first slit 321 and the second slit 322, M ... A virtual straight line connecting the center P1.

Claims (10)

A display unit for an electronic device including a tubular tube having a light irradiation port at the tip and a module substrate housed inside the tubular tube.
The module board is
An elongated thin plate-shaped flexible substrate and
A chip-type light emitting element mounted in the middle of the flexible substrate in the longitudinal direction so that the surface opposite to the light emitting surface faces the plate surface side of the flexible substrate.
Have,
The flexible substrate is bent in a U-shape or substantially a U-shape with the portion where the light emitting element is mounted as a bent portion, and the optical axis of the light emitted by the light emitting element is the center of the tubular tube. A display unit for an electronic device, characterized in that it is housed in the tubular tube so as to match or substantially match the axis. In the display unit for an electronic device according to claim 1,
A display unit for an electronic device, wherein a middle portion in the longitudinal direction of the flexible substrate is a central portion in the longitudinal direction of the flexible substrate. In the display unit for an electronic device according to claim 1 or 2.
A display unit for an electronic device, wherein the module substrate is covered with a tube made of a material having both light transmission and non-conductivity. In the display unit for an electronic device according to any one of claims 1 to 3.
The flexible substrate is provided with a first connection pad and a second connection pad that are electrically connected to the light emitting element at the end portions of the flexible substrate in the longitudinal direction.
One end of an elastic thin plate-shaped first lead piece is connected to the first connection pad, and the other end of the first lead piece is used as an external circuit connection terminal from the rear end of the tubular tube. Protruding outward of the tubular tube,
One end of an elastic thin plate-shaped second lead piece is connected to the second connection pad, and the other end of the second lead piece is used as an external circuit connection terminal from the rear end of the tubular tube. A display unit for an electronic device, characterized in that it projects outward from the tubular tube. In the display unit for an electronic device according to claim 4,
The first connection pad is formed at one end in the longitudinal direction of the flexible substrate, and the second connection pad is formed at the other end in the longitudinal direction of the flexible substrate. Display unit for electronic devices. In the display unit for an electronic device according to claim 4 or 5.
When attached to the rear end of the tubular tube opposite to the light irradiation port and attached to the rear end of the tubular tube opposite to the light irradiation port, the central axis becomes Further provided with a tubular base cap coaxial with the central axis of the tubular tube,
The base cap has a closed end face on one end side, and the closed end face has a closed end face.
A first slit through which the external circuit connection terminal of the first lead piece can penetrate,
The second slit through which the external circuit connection terminal of the second lead piece can penetrate is formed so as to be at equal intervals from the central axis of the base cap and parallel to each other. And
The first slit has an end face shape of the first slit similar to the end face shape of the external circuit connection terminal of the first lead piece, and the end face size of the first slit is the first lead piece. It has a size slightly larger than the end face size of the external circuit connection terminal of
The second slit has an end face shape of the second slit similar to the end face shape of the external circuit connection terminal of the second lead piece, and the end face size of the second slit is the second lead piece. A display unit for electronic devices, which is characterized by having a size slightly larger than the end face size of the external circuit connection terminal of. In the display unit for an electronic device according to claim 6,
In the first slit and the second slit, a virtual straight line connecting the centers of the first slit and the second slit in the longitudinal direction is orthogonal to the sides of the first slit and the second slit in the longitudinal direction. A display unit for an electronic device, which is formed on the closed end surface so as to pass through the central axis of the base cap. In the display unit for an electronic device according to claim 6 or 7.
When the external circuit connection terminal of the first lead piece penetrates the first slit into the external circuit connection terminal of the first lead piece, the first lead piece of the base cap There is a movement control section in the front-back direction that regulates movement in the front-back direction along the central axis.
When the external circuit connection terminal of the second lead piece penetrates the second slit into the external circuit connection terminal of the second lead piece, the second lead piece of the base cap There is a movement control section in the front-back direction that regulates movement in the front-back direction along the central axis.
A display unit for electronic devices that is characterized by this. In the display unit for an electronic device according to any one of claims 1 to 8.
The light irradiation port of the tubular tube is provided with a light transmitting member that transmits light emitted by the light emitting element, and the surface of the light transmitting member facing the light emitting element faces the light emitting element. A display unit for electronic devices, which is provided with a recess into which an element can be fitted. In the display unit for an electronic device according to claim 9,
The light transmitting member is a display unit for an electronic device, characterized in that it is a lens.

Images