JP2000123625A - Light source unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source unit using LED(light emitting diode) as light for installation in a plug-in type socket. SOLUTION: A circuit board 1, a lens having a reflection surface, and a lens cover are mounted from above a light source holder 2 made of synthetic resin, and an electrode plate 3 and electrode pin are accommodated fast in a light source holder body 21 so that a light source unit is formed. The electrode plate 3 is accommodated in the holder 2 symmetrically to the left and the right and embedded in the holder 2 in the condition that a lock piece 31 provided on the plate 3 protrudes from the side face of holder body 12. The electrode pin is inserted in a hole 24 bored from the bottom surface of the holder 2 depending upon the type of the plug-in socket to be mounted, i.e., if it has single contact or double contacts. The light source unit is mounted on the plug-in socket from the lock piece 31, and the light from an LED 11 is irradiated in the circumferential direction through a lens.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to automatic machines, robots,
Installed in production lines, parking lots and dangerous places,
For example, the present invention relates to a light source unit used as a signal indicator lamp for notifying various states such as a shortage of material, a jam of a work, a fullness, a danger, and the like to the surroundings.

[0002]

2. Description of the Related Art Conventionally, for example, in an automatic machine or a production line, a signal indicating lamp for informing the surroundings of an operating state of a device, a shortage of materials, and other various conditions has been installed to keep a user safe. And is used for maintenance of automatic machinery. The signal indicator is a single or a plurality of light sources arranged along a predetermined axis, for example, surrounding a globe having a color corresponding to each light source, so that each colored light is irradiated to the surroundings Has become.

An incandescent light bulb or a halogen light bulb has conventionally been used as a light source of a signal indicating lamp. Generally, a so-called Edison base sphere having a screw-in base and a so-called Swan base sphere having a plug-in type are widely used. Have been. The adoption of this type of light bulb is determined by various conditions such as the demand for the light bulb and the place where the light bulb is installed.Especially when the signal indicator is installed in a place where strong vibration is generated, the Edison base bulb may loosen due to vibration. Therefore, it is mainly used a swan base ball. The signal indicator light attaches the light bulb to the socket incorporated along the predetermined axis,
The light source light from the light bulb is emitted to the surroundings to perform signal notification.
As the socket, one having a specification corresponding to the shape of the base of the bulb to be attached is prepared, and a plug-in type socket is adopted for the swan base sphere.

FIG. 6 is a partial sectional view of the incandescent light bulb and the plug-in type socket of the swan base bulb type. The plug-in socket 71 is, for example, a Japanese Industrial Standard BA15S socket, and has a substantially L-shaped mounting groove 7 cut from an opening edge.
2 are formed. A locking projection 75 provided on a base 74 of the incandescent lamp 73 is engaged with the mounting groove 72, and the incandescent lamp 73 is
Is to be attached. The plug-in type socket 71 shown in FIG. 6 has a single contact type with one internal lead wire terminal 77, but also has a double contact type (not shown) with two lead terminal types. For example, a Japanese Industrial Standard BA15D socket can be mentioned. In the signal indicator lamp, a single-contact or double-contact plug-in socket 71 is provided depending on the number of base terminals 76 of the bulb used.
Is prepared and incorporated in the signal indicator light.

[0005]

However, even in the case of a light bulb having a swan-base specification as a base, disconnection due to vibration or impact cannot be avoided, and maintenance is required as needed because the bulb itself has a long life. I needed to. In addition, light bulbs have high power consumption and are economically disadvantageous. Therefore, a signal indicating lamp adopting an LED which does not cause these problems as a light source has been proposed. As an example, Japanese Patent Laid-Open Publication No.
No. 123701 and Japanese Utility Model Laid-Open No. 4-108806. However, in any of the proposals, the optical device inside the signal indicator lamp is new, and the configuration is different from the bulb specification. To change the signal indicator from the bulb type to the LED type, it was necessary to make a major modification or purchase a new one, so users could incorporate LEDs into existing bulb type signal indicators as light sources. Unit technology was desired.

An object of the present invention is to solve the above technical problems and to provide an LED type light source unit using a plug-in type socket in an existing signal indicator.

[0007]

According to a first aspect of the present invention, there is provided a light source unit comprising: a circuit board on which a plurality of LEDs are erected; In a light source unit combined with a light source holder for attaching to a socket, wiring to the circuit board is provided by a predetermined number of conductive members that are separately fixed in the light source holder formed of a synthetic resin. I do. According to the above configuration, the light source holder can be manufactured in a desired shape by using a synthetic resin as a material. Therefore, the light source holder can be manufactured without diverting the base of the bulb, and the step of caulking the base is not required, which can contribute to the reduction in the number of steps. Further, since the synthetic resin does not have electrical conductivity, it is not necessary to separately perform an insulating process for preventing a leakage of the conductive member incorporated in the light source holder.

According to a second aspect of the present invention, there is provided a light source unit comprising: a circuit board on which a plurality of LEDs are erected; a reflecting member having a reflecting surface for reflecting the LED light in a circumferential direction; In a light source unit combined with a light source holder for mounting on a shaped socket, the wiring to the circuit board is provided by a predetermined number of conductive members that are separately fixed in the light source holder formed of a synthetic resin. And According to the above configuration, it is possible to control the irradiation of the LED light by the reflection surface of the reflection member. Therefore, the LED mounted on the light source unit can be freely arranged in combination with the reflecting member without being limited to the arrangement in which the surroundings are directly emitted.

According to a third aspect of the present invention, there is provided a light source unit embodied in the conductive member according to the first or second aspect of the present invention, wherein the wiring to the circuit board is a first conductive member having a locking projection. The light source unit is provided with a member and a second conductive member having terminal protrusions, and the light source unit is configured such that the locking protrusions protrude from the side surface of the light source holder, and the terminal protrusions protrude from the bottom surface of the light source holder. The light source unit is attached to the plug-in socket with the locking projection, and at the same time, the terminal projection comes into contact with a lead terminal provided inside the plug-in socket. I do. With the above configuration, the socket body and the first conductive member are energized, and the power supply terminal provided inside the socket and the second conductive member are energized. With this configuration, wiring is performed on the circuit board with the first conductive member and the second conductive member.

According to a fourth aspect of the present invention, in the light source unit, the light source holder is a light source holder that can be used for a single contact type with one lead wire terminal provided inside the socket and a double contact type with two lead contacts. Insertion holes are formed in the bottom of the light source holder at a plurality of locations including at least the center of the bottom surface.
The conductive member is housed and fixed in an insertion hole corresponding to each of the above specifications. Further, in the light source unit according to the fifth aspect, the height at which the terminal protrusion protrudes from the bottom surface of the light source holder is determined by mounting a step surface formed in an insertion hole formed from the bottom surface of the light source holder and a second conductive member. It is characterized by being performed. In any of the above configurations, the light source holder can be made by forming the light source holder from a synthetic resin. According to the configuration of claim 4, the light source holders are separately prepared according to the number of lead wire terminals provided in the socket. There is no need to perform this, which contributes to a reduction in the number of parts. Furthermore, by inserting the second conductive member into the insertion hole, the terminal projection protruding from the light source holder has an appropriate height.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view (1) showing a partial cross section of a light source unit of the present invention, and a bottom view (2). FIG. 2 is a longitudinal sectional view of the light source unit. FIG. 3 is an exploded front view showing the configuration of the light source unit.

In FIG. 1, reference numeral 1 denotes a substantially disk-shaped circuit board. On this circuit board 1, a plurality of LEDs 1
.. Are erected circumferentially, and other circuit elements (not shown) are also appropriately mounted. Reference numeral 2 denotes a light source holder of the light source unit. The light source holder 2 is formed by integrally combining a light source holder main body 21 having a shape obtained by cutting both left and right ends of a cylinder into a plane and a base 22 provided thereon. The base 22 has a shape in which a side wall 23 is provided upright on a peripheral edge of a disk, and a plurality of columns 28 projecting upward are arranged at equal intervals on an inner edge of the side wall 23. The lower portion of the light source holder body 21 has a substantially truncated conical shape that is narrowed downward through a step. Although the light source holder is formed of a synthetic resin, it is preferable to use a heat-resistant synthetic resin in view of installation conditions.

An insertion hole 24 for inserting the electrode pin 4 into the light source holder 2 is appropriately formed on the bottom surface of the light source holder body 21. The insertion hole 24 is formed by vertically drilling a space from the bottom surface of the light source holder 2 to the cavity 27 inside the light source holder 2, and a single contact insertion hole 24 a is provided on the central axis of the light source holder 2. Insertion hole 2 for single contact
Insertion hole 24 for double contact made at equal intervals with 4a
There is b. Each of the insertion holes has a vertically extending guide hole 26 and a horizontal step surface 25, and has the same bore diameter. However, the distance from the bottom surface of the light source holder 2 to the step surface 25 in the single contact insertion hole 24a is formed longer than that of the double contact insertion hole 24b.

Reference numeral 3 denotes an electrode plate. The electrode plate 3 is a substantially rectangular plate made of a conductive material such as copper, and has a protruding piece 32 on one short side and a locking piece 31 on one long side. The electrode plate 3 is accommodated in the light source holder 2 so as to be symmetrical with respect to the center axis. The protruding piece 32 protrudes above the base 22, and the locking piece 31 and the long side having the locking piece 31 are formed. The light source holder 21 is disposed so as to protrude from a side surface thereof.

The electrode plate 3 is formed so as to be embedded in the light source holder 2. That is, the electrode plate 3 is placed in a predetermined place in a mold for manufacturing the light source holder 2 in advance, and the electrode is formed by so-called insert molding in which a synthetic resin is poured into the mold to form the light source holder 2. The light source holder 2 in which the plate 3 is embedded is manufactured. In this embodiment, in order to perform the insert molding described above, the electrode plate 3 is formed with a molding hole 33.
Was drilled. In a metal mold for forming the light source holder 2, a fixing pin is arranged for positioning the electrode plate 3, and the electrode plate 3 is supported by being inserted into the forming hole 33. A molding groove 29 is provided in the light source holder body 21 at a position where the molding hole 33 is located, corresponding to the fixing pin. It should be noted that a single fixing pin for supporting the electrode plate 3 should be provided in a plural number, since the positioning becomes unstable when a single pin is used. With the configuration described above, the electrode plate 3 can be embedded in the light source holder 2 without causing a positional shift, and a desired light source holder can be formed. still,
In the insert molding, the cavity 27 is provided to suppress the wall pressure in the light source holder 2, thereby preventing the molded product of the light source holder 2 from showing sink marks such as wavy patterns.

The combination of the light source holder 2 and the electrode plate 3 is not limited to the insert molding described above. For example, the light source holder 2 is formed by dividing the light source holder 2 into two parts, and the light source holder 2 is assembled by sandwiching the electrode plate 3. There are various methods. However, in the above insert molding, since the electrode plate 3 and the light source holder 2 are integrally formed, the electrode plate 3 is securely fixed and does not come off due to vibration, which is a good measure.

The circuit board 1 is accommodated in a base 22 of the light source holder 2 in which the electrode plate 3 is embedded. At this time, the protruding piece 32 of the electrode plate 3 and a plurality of columns protrude from the base 22. The circuit board 1 can be mounted at a predetermined position by forming a hole corresponding to the circuit board and a cutout on the periphery. In particular, by arranging the support 28 in the base 22 so as to be non-rotationally symmetric, the circuit board 1 can be mounted without reverse mounting. The protruding pieces 32 of the electrode plate 3 protruding into the circuit board 1 are soldered on the pattern surface on the circuit board 1 so as to energize the electrode plate 3.

The electrode pin 4 is a conductive pin having a terminal 41 having a hemispherical protrusion at one end, and the terminal 41 is inserted downward into the insertion hole 24 inside the light source holder 2. The arrangement of the electrode pins 4 is determined by the number of lead wire terminals in the plug-in socket to be energized. That is, the lead wire terminal is 1
For the single contact type, the electrode pin 4 is inserted into the single contact insertion hole 24a. Next, for the double contact type with two lead wire terminals, the electrode pin 4 may be inserted into the double contact insertion hole 24b. Therefore, a single light source holder can be used to prepare power supply terminals corresponding to the number of lead wire terminals, and it is not necessary to prepare a separate light source holder depending on the specifications.

The electrode pins 4 inserted in the insertion holes 24 of the light source holder 2 as described above are surely guided vertically upward by the guide holes 26, and the terminals 41 are attached to the step surfaces 25 to be accommodated in the light source holder 2. Is done. At this time, the terminal 41 projects from the lower surface of the light source holder 2, and at the same time, the other end of the electrode pin 4 projects from the circuit board 1. This one end is soldered on the pattern surface on the circuit board 1 to form an electrode pin 4
And bring electricity.

As shown in FIG. 3, the light source unit is constructed by mounting the reflecting member on the light source holder in which the respective components are combined as described above. The lens 51 is formed by cutting a cylindrical body made of a translucent material into a conical upper portion, and the stacked body is mounted on the base 22 of the light source holder 2.
At this time, the lens 51 is attached to the support 28 on the light source holder 2.
Is placed on the circuit board 1 with a space therebetween. The lens cover 53 is a cylindrical body made of the same translucent material as the lens 51, covers the light source holder 2 on which the lens 51 is mounted, and is mounted on the light source holder 2. Lens cover 53
Various methods such as using an adhesive or an engaging means can be considered for mounting the light source holder 2 on the light source holder 2. However, the step 54 provided at the opening edge of the lens cover 53 is connected to the upper edge of the side wall 23 on the base 22. In addition, if a welding method using ultrasonic waves (welder processing) is used, joining can be performed without producing a special part or shape. Moreover, since the lens cover 53 is not stained, it does not affect the irradiation of the light source light, which is a good measure.

The light source unit is manufactured by the above configuration. Irradiation light from the LED 11 is guided through a lens 51 located above, and is split into a horizontal direction (substantially horizontal direction) and an upward direction by a conical notch 52 provided above the lens 51. That is, the notch 52 in the lens 51 becomes a reflection surface, and a part of the LED light is emitted in the lateral direction. Thereby, the LED light emits light of 360 ° in the horizontal direction, and the irradiation light of the light source unit can be visually recognized from any of the surroundings.

FIG. 4 is a partial sectional view showing a state in which the light source unit is attached to the plug-in type socket. FIG. 4A shows a state where the light source unit is attached to a socket of a single contact specification, and a light source unit in which an electrode pin 4 is inserted into a single contact insertion hole 24a is used. A coil spring 63, a lead wire 64, and an insulating plate 66 are housed inside a cylindrical socket 61. Further, the socket 61 has a substantially L-shaped mounting groove 62 cut from an opening edge. Is formed. The locking piece 31 of the light source unit is inserted into the mounting groove 62, and the light source holder 2 is inserted into the socket 61 against the spring force of the coil spring 63.
Is locked in the mounting groove 62 to hold and hold the light source unit in the socket 61. In the single contact specification, the socket 61 body functions as the other terminal in addition to the lead terminal 65, and the circuit board 1 is energized by the electrode pins 4 and the electrode plate 3. FIG.
(2) shows a state where the light source unit is attached to a socket of a double contact specification, and a light source unit in which an electrode pin 4 is inserted into a double contact insertion hole 24b is used. In this specification, power is supplied to the circuit board 1 through the electrode pins 4 by the two lead wire terminals 65.

By the way, the specification of the socket is such that the single contact and the double contact have the same socket shape, and it is difficult to determine which specification from the appearance. If a light bulb or light source unit that does not conform to the socket specifications is installed, it will not light due to the different wiring method. However, if a light bulb and a light source unit with a single power supply terminal are attached to the double contact type, not only does not light up, but also a short circuit occurs between the wirings, which may cause damage.

In view of this, in the present embodiment, the terminal 41 of the electrode pin 4 that contacts the lead wire terminal is
Step surface 2 having a height projecting from the lower surface in insertion hole 24
By forming each element so as to be determined according to 5, the short circuit is prevented from occurring even if the specification of the socket to be mounted is wrong. That is, as shown in FIG. 5, even when the light source unit having the single contact is mounted on the socket of the double contact specification, the electrode pin 4 of the light source unit has the step surface 25 of the insertion hole 24a for the single contact provided further inward. Since the protrusion of the terminal 41 from the lower surface of the light source holder 2 is small, the terminal 41 does not contact the two lead wire terminals 65.

From this, the position of the step surface may be determined so as to minimize the protrusion of the terminal 41 from the lower surface of the light source holder 2. However, by suppressing the protrusion, the area that can contact the lead wire terminal is reduced. become.
If there is a slight displacement between the socket and the light source holder due to vibration or shock, the contact between the terminals on the central axis in the single contact specification will have little effect, but the double contact specification will have little effect on the central axis. At a position distant from the light source holder. For this reason, in the double contact specification, it is a problem that the area where the terminal can contact is reduced. Therefore, in the light source holder 2 in this embodiment, the step surface 25 is provided more inward with respect to the single contact insertion hole 24a on the center axis, and the contact area is taken into consideration for the double contact specification. In this case, a step surface is provided.

The present invention is not limited to the above embodiment. For example, in the above embodiment, the LED light is radiated in a substantially horizontal direction via the reflecting member.
The ED may be set up horizontally to irradiate the surroundings with the direct light of the LED light. The standing of the LEDs is not limited to the circumferential shape, but may be arranged in a linear shape or a polygonal shape. The reflecting member is not limited to the configuration of the lens and the lens cover, but in addition to, for example, performing a vapor deposition process on the reflecting surface in order to improve the reflection efficiency, and setting the reflecting member to irradiate the LED light in a desired direction. do it. Further, the conductive member is not limited to the electrode plate 3 and the electrode pin 4, but may be a conductive member having a shape generally used for electrical connection. The insertion hole 24 into which the electrode pin 4 is inserted is also formed in a shape corresponding to the shape of the electrode pin, and may be designed to be at a position where it comes into contact with the lead wire terminal when the light source holder is accommodated in the socket. Furthermore, the electrode plates 3 arranged symmetrically may be connected to each other.
In addition, various design changes and adoption to the same kind of product are possible without changing the gist of the present invention.

[0027]

Since the present invention is configured as described above, in the signal indicator lamp, a light source unit that supplies power to the existing plug-in socket according to either the single contact or the double contact is prepared. By simply attaching the light source unit, it is possible to switch to a signal indicator using an LED as a light source. The light source unit configured in the present application can be applied not only to the signal indicator light but also to attaching the LED light source to the plug-in socket. Also,
By making the light source holder attached to the socket made of a synthetic resin, the light source holder can be manufactured in a desired shape. For example, a guide hole was provided so that the electrode pin could be reliably placed at a desired position so that the electrode pin would not be displaced by being swung when inserted into the light source holder. For this reason, processing by an automatic machine became possible, and it contributed to reduction of man-hours. In addition, a single contact with one light source holder,
In addition to providing an insertion hole to support both specifications of the double contact, power is supplied by designing the corresponding insertion hole on the light source holder side to suppress the projection of the electrode pin from the bottom of the light source holder in the single contact specification. The occurrence of short circuit due to the difference in specifications was prevented.

[Brief description of the drawings]

FIG. 1 is a front view (1) showing a partial cross section of a light source unit according to an embodiment of the present invention, and a bottom view (2).

FIG. 2 is a longitudinal sectional view of the light source unit.

FIG. 3 is an exploded front view showing a configuration of the light source unit.

FIG. 4 is a front view showing a partial cross section of the use state of the light source unit, wherein (1) shows a state accommodated in a socket of a single contact specification, and (2) shows a state accommodated in a socket of a double contact specification. Is shown.

FIG. 5 is a schematic cross-sectional view showing a state where a light source unit of a single contact specification is accommodated in a socket of a double contact specification.

FIG. 6 is a front view showing a partial cross section of the incandescent lamp in use.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Circuit board 11 LED 2 Light source holder 21 Light source holder main body 22 Base 24 Insertion hole 24a Insertion hole for single contact 24b Insertion hole for double contact 25 Step surface 26 Guide hole 3 Electrode plate 31 Locking piece 4 Electrode pin 41 Terminal 51 Lens 53 Lens cover

Claims (5)

[Claims] 1. A light source unit comprising a circuit board on which a large number of LEDs are erected and a light source holder for fixing the circuit board and attaching the same to a plug-in socket, wherein the wiring to the circuit board is A light source unit provided by a predetermined number of conductive members that are separately fixed in a light source holder formed of a synthetic resin. 2. A circuit board on which a number of LEDs are erected.
A reflecting member having a reflecting surface for reflecting ED light in a circumferential direction,
In a light source unit in which these are fixed and combined with a light source holder for attaching to a plug-in type socket, wiring to the circuit board is a predetermined number of conductive members which are separately fixed in a light source holder formed of synthetic resin. A light source unit provided by: 3. The wiring to the circuit board is provided by a first conductive member having a locking projection and a second conductive member having a terminal projection. It is formed by projecting from the side surface of the light source holder and projecting the terminal protrusion from the bottom surface of the light source holder to accommodate and fix the respective conductive members. The light source unit is attached to the plug-in type socket with the locking protrusion, 3. The light source unit according to claim 1, wherein the terminal protrusion contacts a lead terminal provided inside the plug-in socket. 4. The light source holder according to claim 1, wherein the light source holder has a single lead wire terminal provided inside the socket and can be used for both a single contact type and a double contact type. 4. The light source unit according to claim 3, wherein the second conductive member is accommodated and fixed in an insertion hole corresponding to each of the above specifications. 5. The height of the terminal protrusions protruding from the bottom surface of the light source holder is determined by a step surface formed in an insertion hole formed from the bottom surface of the light source holder and a second conductive member. The light source unit according to claim 3, wherein