JP2875300B2 - Lamp device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lamp device in which a light emitting diode and a protection element such as a current limiting resistor are connected in series, and in particular, the lamp device is miniaturized and laid out. The present invention relates to a structure capable of expanding the above-mentioned degree of freedom and facilitating an assemblability and a design for changing the number of lamp devices to be used. INDUSTRIAL APPLICABILITY The present invention is suitable for an indicator lamp device employed as a warning device for a lubricating oil level or the like in a motorcycle, for example.

[Conventional technology]

In some motorcycles, when the level of the lubricating oil or fuel in the tank is lower than a predetermined level, an indicator lamp device using a light emitting diode may be provided as a warning device for notifying the driver of the level. Conventionally, as such an indicator lamp device, for example,
Some are shown in the figure. The lamp device 20 includes light emitting diodes 22 and 2 on a printed circuit board 21 on which a wiring pattern is formed.
2, a current limiting resistance element 23 as a protection element, a backflow prevention diode (not shown), a stabilizing capacitor, and the like are mounted, and these are connected to a wiring pattern by soldering. The resistance element 23 serves to limit the current applied to the light emitting diode 22 to a rated value. The lamp device 20 is connected to the bottom plate 26 in the meter case 26.
It is mounted on the protrusion of a and is fixed with screws 28. The indicator lamp device 20 is connected to a battery via lead wires 29, 29 via a switch circuit (not shown). Reference numeral 30 denotes a grommet for holding a lead wire fitted to the bottom wall 26a, 31 denotes a display plate on which a warning display mark or the like is described, and 23 denotes a reflection panel.

In the indicator lamp device 20, when the lubricating oil or fuel falls below a predetermined level, the switch circuit closes,
As a result, the light emitting diode 22 is turned on by the application of the voltage from the battery, and the warning display mark and the like are visually recognized by the driver.

[Problems to be solved by the invention]

By the way, the above-mentioned conventional indicator lamp device has a structure in which each component element (each resin-molded) such as a light emitting diode and a resistance element is soldered one by one onto a printed circuit board. It takes many man-hours. In addition, it is necessary to mount each element with a certain interval between them, which results in a large layout space as a whole and a low degree of freedom in layout when arranging in a narrow meter case. There is.
Further, when the number of the light emitting diodes to be used is changed, the shape and size of the printed circuit board must be changed, which causes a problem that the design is troublesome and the number of parts is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and it is possible to reduce the size of a lamp device to increase the degree of freedom in layout, and to facilitate assembly work.
It is another object of the present invention to provide a lamp device that can be easily designed even when the number of light emitting diodes used changes.

[Means for solving the problem]

Therefore, the present invention provides an indicator lamp device for a vehicle in which at least a light emitting diode and a protection element such as a current limiting resistance element are connected in series between one end of an external connection terminal and embedded in a transparent resin body. To
A bullet-shaped light-emitting portion in which the light-emitting diode and the protection element are embedded, and an oval cross-section having a major axis formed integrally with the bottom of the light-emitting portion and extending so as to extend through the center of the light-emitting portion. And extending one end of the external connection terminal so as to be exposed to the outside along a portion corresponding to a long axis of the outer surface of the plug portion, and further extending a lower end portion of the plug portion. It is characterized by being bent into a U-shape to sandwich it.

Here, the present invention includes not only the case where only the light emitting diode and the resistance element are integrated by resin molding, but also the case where other elements such as a backflow prevention diode and a stabilizing capacitor are resin molded together.

[Action]

According to the lamp device according to the present invention, the light emitting diode and the protection element such as the current limiting resistance element are made into one unit by resin molding, and the plug part having an oval cross section is provided at the bottom of the shell-shaped light emitting part 2a. 2b is formed to protrude, and external connection terminal 8
The other end of a, 8b is extended to the outside surface of the plug portion 2b so as to be exposed outward along a portion corresponding to the long axis, and is bent in a U-shape so as to sandwich the lower end portion of the plug portion 2b. The plug 2b can be easily positioned and inserted into the socket 15 when assembling the lamp device 1, and the external connection terminals 8a and 8b do not bend. The assembling work is very easy as compared with the method of soldering on a printed circuit board one by one. Also,
Since the light emitting diode and the resistive element are in one unit, the required installation space is smaller than in the conventional case where each element is mounted with a certain spacing, and the lamp device is downsized accordingly. it can. as a result,
The degree of freedom in layout when using the lamp device in a narrow place can be expanded. Further, since a printed wiring board is not required, it is not necessary to change the printed wiring board when the number of used boards is changed, and the layout design is simple.

〔Example〕

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 to 5 are views for explaining a lamp device according to an embodiment of the present invention. In this embodiment, a description will be given of an indicator lamp device for a motorcycle as an example.

4 and 5, reference numeral 10 denotes a meter case, which is provided with a display plate 12 on an upper portion of a case main body 11 composed of a side wall 11a and a bottom wall 11b.
The reflective panel 13 is provided at an intermediate portion between the reflective panel 11b and the reflective panel 13b. Also, two socket holes 1 formed in the bottom wall 11b are formed.
A rubber socket 15 is removably fitted and mounted on 1c, and a connection recess 15a recessed above the socket 15 is provided.
An input / output piece 15b is provided in the inside. Further, one end of a lead wire 16 is connected to each of the input and output pieces 15b, and the other end is connected to a battery 17.
Further, a switch 14 is provided in the middle of the lead wire 16 of the input section, and the switch 14 is turned on and off by a signal from a level gauge 18a for detecting an oil level in the lubricating oil tank.

The one socket 15 is provided with an oil indicator lamp device 1 for lighting and displaying that the remaining amount of lubricating oil is low. In this lamp device 1, a chip-shaped light emitting diode element 3, a current limiting resistor element 4, a backflow preventing diode 5, a stabilizing capacitor element 6, and external connection terminals 8a and 8b are integrally formed in a transparent resin body 2. It is buried and configured. In some cases, the capacitor element 6 is unnecessary.

Each of the elements 3 to 6 is mounted on an insulating base 7 on which a connection pattern is formed, and constitutes a circuit shown in FIG. That is, this circuit has a configuration in which the resistance element 4, the light emitting diode element 3, and the diode element 5 are connected in series between the external connection terminals 8a and 8b, and the capacitor element 6 is connected in parallel. The upper ends of the external connection terminals 8a and 8b are soldered on the patterns of the left and right corners of the base 7.

The resin body 2 includes a shell-shaped light emitting portion 2a and a plug portion 2b formed integrally with the bottom of the light emitting portion 2a and having a long axis extending transversely through the center of the light emitting portion 2a and having a long axis.
Each of the elements 3 to 6 is located in the light emitting section 2a. The lower half of each of the connection terminals 8a and 8b extends outwardly along a portion corresponding to the long axis of the outer surface of the plug 2b, and further sandwiches the lower end of the plug 2b. As in the U-shape. The upper end of the light emitting portion 2a projects from the reflective panel 13 and is close to the display panel 12, and the plug portion 2b is connected to the connection recess 15 of the socket 15.
The connection terminals 8a and 8b are pressed into contact with the input and output pieces 15b of the socket 15 and are electrically connected.

Reference numeral 45 denotes a fuel indicator lamp device which lights up when the fuel level is equal to or lower than a predetermined level. This device 45 has the same structure as the lamp device 1 and has the same circuit configuration as that shown in FIG. It is thus connected to the fuel level gauge.

 Next, the operation and effect of this embodiment will be described.

In the indicator lamp device 1 of the present embodiment, the level of the lubricating oil is detected by the level gauge 18a, and when the level falls below a predetermined level, a close signal is output to the switch 14. Then, the switch 14 is turned on, a battery voltage is applied to the light emitting diode element 3, and the light emitting diode element 3 emits light to warn of a decrease in level.

As described above, according to the present embodiment, the light emitting diode elements 3, the current limiting resistance elements 4, the backflow prevention diodes 5, and the stabilizing capacitor elements 6 are mounted on the base 7, and externally connected thereto. A circuit is formed by connecting the terminals 8a and 8b, and this circuit portion is buried in the transparent resin body 2 to form one unit, and the other end of the external connection terminals 8a and 8b is connected to the resin body 2.
Has the following effects.

In assembling the lamp device 1, it is only necessary to insert the plug portion 2b into the socket 15, and the assembling work is very easy as compared with the case where each element is soldered on a conventional printed circuit board. Further, since the lamp device is unitized, the arrangement space can be reduced. In other words, in the conventional device, since each element is mounted, an interval that does not hinder the mounting operation is required between the elements. However, in the present embodiment, such an interval is hardly necessary, and the arrangement space can be reduced accordingly. . As a result, the overall size can be reduced and a narrow meter case
The degree of freedom in layout within 10 can be expanded.

In the above-described conventional apparatus, when the number of lamp devices 1 to be used is increased, it is necessary to change the design of the printed wiring board. However, in the present embodiment, the printed wiring board is not required, so that the design is easier. .

In the above embodiment, the case where all the elements 3 to 6 are embedded in the resin body 2 has been described as an example. However, in the present invention, at least the light emitting diode element 3 and the current limiting resistance element 4 are embedded in the resin body 2. It may be buried.

Further, in the above embodiment, the socket 15 is detachably fitted to the bottom wall 11b of the case main body 11, but the structure for connecting the lamp device of the present invention is not limited to the above. For example, as shown in FIG. 6, a socket portion 42 is formed integrally with a guide portion 41 protruding from a bottom wall 40a of a case body 40, and a connection portion connected to the lead wire 16 in the socket portion 42. The piece 42a is buried. And the socket part 4
The external connection terminals 8a, 8b may be connected to the connection piece 42a by inserting the plug portion 2b of the lamp device 1 into 2. In the case of such a configuration, the cost can be reduced as much as the above-mentioned socket 15 can be eliminated, and the meter case can be made thinner.

The reason why the socket portion 42 can be integrally formed in this manner is as follows. That is, in the case of the conventional light bulb type, the socket needs to be configured so as to be detachable from the case together with the light bulb so that the light bulb can be replaced when the bulb runs out. Therefore, the socket cannot be integrated with the case. On the other hand, in the case of the light emitting diode type as in the present embodiment, there is no problem of breaking the bulb, so that the socket can be integrated with the case, and the above-described effects can be obtained.

In the above embodiment, the indicator lamp device is taken as an example. However, the application range of the lamp device of the present invention is not limited to this, and can be applied to, for example, digital display of the vehicle speed.

〔The invention's effect〕

As described above, according to the lamp device of the present invention, at least the light emitting diode and the current limiting resistance element are embedded in the resin to form a unit, and the bottom of the shell-shaped light emitting section is provided with a plug having an oval cross section. A portion is formed so as to protrude, and one end of the external connection terminal is extended so as to be exposed outward along a portion corresponding to the long axis of the outer surface of the plug portion, and a U-shape is formed so as to sandwich the lower end portion of the plug portion. Because of the bent shape, the plug can be easily positioned and inserted into the socket when assembling the lamp unit, and the external connection terminals do not bend, and the lamp unit is downsized and laid out. This has the effect of increasing the degree of freedom described above, as well as facilitating the assembling work, and simplifying the design when the number of light emitting diodes used is changed.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 5 are views for explaining a motorcycle indicator lamp device according to an embodiment of the present invention, and FIG. 1 (a) is a sectional front view thereof. 1 (b) is a sectional side view, FIG. 2 is a perspective view thereof, FIG. 3 is a perspective view showing each component element buried in a resin, and FIG. 4 is mounting the lamp device in a meter case. Sectional view showing a state in which
FIG. 5 is a circuit diagram thereof, FIG. 6 is a sectional view showing a modification of the above embodiment, and FIG. 7 is a sectional view showing a conventional lamp device. In the figure, 1 is an indicator lamp device, 2 is a resin body, 2a is a light emitting portion, 2b is a plug portion (bottom portion), 3 is a light emitting diode, 4 is a current limiting resistor, and 8a and 8b are external connection terminals.

Continuation of the front page (56) References JP-A 50-10166 (JP, U) JP-A 58-49455 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H01L 33 / 00

Claims (1)

(57) [Claims] 1. A vehicular indicator lamp device comprising a light emitting diode and a protection element such as a current limiting resistor connected in series between one end of an external connection terminal and embedded in a transparent resin body. A cross-sectional length having a shell-shaped light emitting portion in which the light emitting diode and the protection element are embedded, and a long axis formed integrally with the bottom of the light emitting portion and extending so as to extend through the center of the light emitting portion. A circular plug portion, one end of the external connection terminal is extended so as to be exposed outward along a portion parallel to a long axis of an outer surface of the plug portion, and further, An indicator lamp device for a vehicle, wherein the indicator lamp device is bent in a U shape so as to sandwich a lower end portion.