JPH0732975U - LED element holder structure - Google Patents

Abstract

(57) [Abstract] [Purpose] When soldering the LED element to the FPC board, the LED element is stably fixed to the FPC board even when the lead portion of the LED element is long, and the load applied to the soldering location. The present invention provides a holder structure for an LED element in which the FPC plate to which the LED element is connected can be reliably assembled to the back surface of the case by reducing the above-mentioned problem and preventing a connection failure. [Structure] The LED element 1 is provided by being attached to a holder 4 made of an elastic member, and is inserted into an insertion hole 14 of an FPC board 11 to be fitted and inserted into
A leg portion 7 for positioning and fixing the PC board 11 and the holder 4 is integrally formed so as to hang down from the rear surface of the base portion 6. In order to assemble the case 15 and the holder 4 mounted with the LED element 1 fixed to the FPC board 11 through the projection 20 formed on the back surface of the case 15, the tip of the leg 7 is removed from the surface of the base 6. Thus, the hollow portion 8 is bored. The diameter of the hollow portion 8 is slightly smaller than the diameter of the protrusion 20.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a holder structure for an LED (light emitting diode) element, which is provided with a holder when the LED element is fixed to an FPC (flexible print kit) plate.

[0002]

[Prior art]

 Conventionally, when an LED element mounted on an FPC board is electrically connected by soldering, it is general that the soldering point also serves as fixing the LED element and the FPC board. The FPC board on which the LED element is mounted and fixed by soldering is inserted into the LED element insertion hole formed on the back surface of the case housing the vehicle instrument main body, for example, and the FPC board is placed along the case while When the light emitted from the LED element is used for illumination such as a warning display section that displays vehicle information, the LED element is provided with a long lead portion and the LED element is made taller by soldering and fixing it to the FPC board. In many cases, the structure is placed behind the display such as the warning display. Further, when the FPC plate is placed along the case, the FPC plate is fixed by using screws, and a plurality of protrusions integrally provided on the back surface of the case and the protrusions provided on the FPC plate corresponding to the protrusions. Often assembled with insertion holes.

[0003]

[Problems to be solved by the device]

 However, when the lead portion of the LED element is lengthened as in the conventional case, the FPC board has flexibility unlike the rigid rigid board only when the LED element is connected to the FPC board by soldering. As a result, stable fixation cannot be obtained, and if the LED element is protruding from the FPC board, the external force received by the LED element will remain as it is if it contacts an external obstacle during transportation or assembly to the case. Since a load is applied to the mounting portion, there are problems that the soldering portion of the lead portion is damaged and a connection failure occurs, or the lead portion is detached from the FPC board. Further, when fixing the case and the FPC board, the FPC board is surely maintained in the state where the FPC board is provided along the case, but the FPC board is partially lifted at the assembly location by the protrusion. There was also a risk that the insertion hole would come off the protrusion.

The present invention focuses on the above-mentioned problems, and when connecting the LED element and the FPC board by soldering, even if the lead portion of the LED element is long, the LED element is stably fixed to the FPC board and the soldering point is applied. It is an object of the present invention to provide a holder structure for an LED element in which the load is reduced to prevent connection failure and the FPC board to which the LED element is connected can be reliably assembled to the back surface of the case.

[0005]

[Means for Solving the Problems]

 According to the present invention, the lead portion of the LED element is inserted into a small hole formed in the FPC board and soldered to electrically connect the LED element and the conductive pattern formed on the FPC board to accommodate various kinds of internal devices. The FPC board is provided along the case while inserting the LED element into the LED element insertion hole formed on the back surface of the case. The LED element is mounted on a holder made of an elastic member. , A leg portion for inserting and fitting into an insertion hole formed in the vicinity of the small hole of the FPC plate to position and fix the FPC plate and the holder is integrally formed so as to hang from the rear surface of the base of the holder, and the LED element insertion hole. The protrusion formed corresponding to the insertion hole is inserted in the rear surface of the case which is in the vicinity of the case, and the case and the holder mounted with the LED element fixed to the FPC board are assembled, and the projection is formed from the surface of the base. Part or substantially the same as diameter of the projection passing the tip of, or the holder structure of the LED element, characterized in that bored hollow portion having a slightly smaller again diameter.

[0006]

[Action]

 Since the holder holds the LED element stably, and the projections that hang down from the back surface of the base of the holder are inserted into the insertion holes formed in the FPC plate to position and fix the LED element, it is assumed that external force is applied to the LED element. However, all of this external force is not applied as a load to the soldering location connecting the LED element and the FPC board, and the protrusion is also loaded via the holder, so the load applied to the soldering location can be reduced. Further, by inserting the protrusion provided on the back surface of the case into the hollow portion, after the insertion, a pressing force is applied to the leg portion in the outward direction, and this pressing force is transmitted to the FPC board.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 4 show a first embodiment, 1 is an LED element, and this LED element 1 is composed of a light emitting portion 2 and a lead portion 3, and an insertion portion of a holder 4 made of an elastic member such as a rubber member. The lead portion 3 is inserted into the holder 5 so that the tip thereof projects from the holder 4, and the lower portion of the light emitting portion 2 is also incorporated and held in the holder 4.

On the back surface of the base portion 6 of the holder 4, two leg portions 7 are integrally formed so as to hang down from the base portion 6, and the inner diameter is increased from the surface of the base portion 6 toward the tips of the leg portions 7. A hollow portion 8 formed by equalizing is bored. The diameter of the hollow portion 8 is set to be slightly smaller than the diameter of the protrusion formed on the back surface of the case, which will be described later, and is inserted into the hollow portion 8. Further, an inclined locking projection 10 is provided on the upper portion of the cylindrical portion 9 of the holder 4.

Reference numeral 11 denotes an FPC board. A conductive pattern 12 is formed around the surface 11a of the FPC board, and the tip of the lead portion 3 of the LED element 1 is provided at a predetermined position of the conductive pattern 12. A small hole 13 is formed for inserting and soldering. In the vicinity of the small hole 13, the leg portion 7 is inserted from the back surface 11b of the FPC board (the surface on which the conductive pattern 12 is not formed) to insert the insertion hole 14 for positioning and fixing the holder 4 and the FPC board 11. It is set up.

Reference numeral 15 is a case for accommodating a vehicle instrument body or the like (not shown), and an LED element insertion hole 16 for inserting the tubular portion 9 of the holder 4 in which the LED element 1 is mounted is provided on the back surface 15a of the case 15. It is formed by an insertion wall 17 provided integrally with the case 15. Further, the guide protrusions 18 are provided on the opposite surfaces of the upper portion of the insertion wall 17, respectively. A concave surface 19 is formed on the back surface 15a of the case 15 located around the LED element insertion hole 16 in conformity with the shape of the base 6 of the holder 4, and two concave surfaces 19 are formed on the back surface 15a of the case 15. Projections 20 are formed.

Next, the operation of the above configuration will be described. First, the holder 4 having the LED element 1 mounted thereon is inserted into the insertion hole 14 formed in the FPC board 11 through the insertion hole 14 from the back surface 11b side of the FPC board and positioned, and the lead portion 3 of the LED element 1 is inserted. The tip end is inserted into the small hole 13, and then the lead portion 3 is soldered to the FPC board 11 with the solder 21 to electrically connect the LED element 1 and the conductive pattern 12 and the soldering point and the leg portion. The holder 4 and the FPC board 11 are fixed by 7 (see FIG. 2).

In this case, even if the lead portion 3 of the LED element 1 is set to be long, since it is attached to the holder 4, it is stably held, and the leg portion 7 provided integrally with the holder 4 has an FPC board. Since it is positioned and fixed with the external element, even if the LED element comes into contact with an obstacle and receives an external force during transportation or when assembling the case 15 to be described later, the external force is soldered as it is. The load is not applied to the place, and the load is also applied to the leg portion 7 via the holder 4, so that the load applied to the soldering place can be reduced. Therefore, it is possible to remarkably solve the problems that the soldering portion of the lead portion 3 of the LED element 1 is damaged to cause connection failure and the lead portion 3 is detached from the FPC board 11.

While the FPC board 11 to which the above-mentioned LED element 1 is connected is guided to the LED element insertion hole 16 formed in the back surface 15a of the case 15, and the tubular portion 9 of the holder 4 is guided by the insertion wall 17 first. As it is inserted, the protrusion 20 integrally provided from the case 15 is inserted into the hollow portion 8 formed in the holder 4 in the insertion process, and the surface of the base 4 and the concave surface 19 come into contact with each other to complete the assembly. To do.

At this time, the holder 4 is securely fixed by the locking projection 10 provided on the upper part of the holder 4 and the guide projection 18 provided on the upper part of the insertion wall 17 without coming off (see FIG. 3). . Further, in the case of this embodiment, since the diameter of the hollow portion 8 is set to be slightly smaller than the diameter of the protrusion 20, by inserting the protrusion 20 into the hollow portion 8, the leg portion 7 is inserted after the insertion. Is applied outwardly, the leg portion 7 is deformed outwardly, and the pushing force is transmitted from the insertion hole 14 to the FPC board 11 (see the arrow in FIG. 4). Therefore, the insertion hole 14 of the FPC board 11 is attached to the leg portion. The FPC board 11 is favorably arranged and maintained in the case 15 without fear that it will come off from 7.

As described above, according to the structure of the holder 4 of the LED element 1 of this embodiment, the LED element 1 is stably fixed to the FPC board 11, and the load applied to the soldering portion is reduced to prevent connection failure. The FPC board 11 to which the LED element 1 is connected is securely assembled on the back surface of the case 15 while preventing it from occurring.

FIG. 5 shows a second embodiment. In this embodiment, the inner diameter of the hollow portion 8a is set to be smaller from the surface of the base portion 6 of the holder 4 toward the tip of the leg portion 7.

In the above structure, as the protrusion 20 is inserted into the hollow portion 8a, a pushing force is applied to the leg portion 7 made of an elastic member in the outward direction, so that the leg portion 7 is deformed in the outward direction. After that, the FPC board 11 is favorably arranged and maintained in the case 15 as in the first embodiment.

FIG. 6 shows a third embodiment. In this embodiment, the hollow portion 8b corresponding to the seven leg portions with which the insertion holes 14 of the FPC board 11 are in contact is formed along the circumferential direction. Further, the annular projection 22 is provided, and the diameter of the other hollow portion 8b is substantially the same as the diameter of the projection 20 to be inserted.

Also in the above configuration, as the protrusion 20 is inserted into the hollow portion 8b, a pressing force is applied outwardly to the leg portion 7 made of an elastic member, and the leg portion 7 is deformed outwardly. It is possible to obtain the same effects as those of the first and second embodiments.

The present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the invention. For example, the number of legs integrally formed from the base of the holder is not limited to two, but one or three or more may be provided. Further, the structure of the hollow portion is not limited to the above-mentioned embodiment as long as it can maintain the state in which the outward pressing force is always applied to the leg portion of the holder after being assembled in the case.

[0021]

[Effect of device]

 According to the present invention, the lead portion of the LED element is inserted into a small hole formed in the FPC board and soldered to electrically connect the LED element and the conductive pattern formed on the FPC board to accommodate various kinds of internal devices. The FPC board is provided along the case while inserting the LED element into the LED element insertion hole formed on the back surface of the case. The LED element is mounted on a holder made of an elastic member. , A leg portion for inserting and fitting into an insertion hole formed in the vicinity of the small hole of the FPC plate to position and fix the FPC plate and the holder is integrally formed so as to hang from the rear surface of the base of the holder, and the LED element insertion hole. The protrusion formed corresponding to the insertion hole is inserted in the rear surface of the case which is in the vicinity of the case, and the case and the holder mounted with the LED element fixed to the FPC board are assembled, and the projection is formed from the surface of the base. By forming a hollow part that has a diameter that is approximately the same as or slightly smaller than the diameter of the protrusion that passes through the tip of the holder, the holder holds the LED element stably and from the back surface of the base of the holder. Since the protrusion formed by hanging is inserted into the insertion hole formed in the FPC board to position and fix it, even if an external force is applied to the LED element, this external force will connect all the LED element and the FPC board. Since the load is not applied to the soldering point, and the load is applied to the protrusions via the holder, the load on the soldering point can be reduced, and the soldering point on the lead part of the FPC board is damaged, resulting in poor connection. It is possible to provide a holder structure for an LED element, which can remarkably solve the problems such as the occurrence of trouble and the detachment of the lead portion from the FPC board. Also, by inserting the protrusion provided on the back surface of the case into the hollow part, after the insertion, a pushing force is applied to the above-mentioned protrusion toward the outside, and this pushing force is transmitted to the FPC plate. The FPC board is favorably arranged and maintained in the case without fear of the holes coming off the protrusions. Therefore, the intended purpose is sufficiently achieved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a holder and an FPC board according to a first embodiment.

FIG. 2 is a cross-sectional view of the same embodiment as before mounting a case.

FIG. 3 is a cross-sectional view after assembling the case of the above embodiment.

FIG. 4 is a cross-sectional view after assembling the case according to the above embodiment, which is viewed from a direction different from that of FIG.

FIG. 5 is a sectional view of a second embodiment.

FIG. 6 is a sectional view of a third embodiment.

[Explanation of symbols]

 1 LED element 4 Holder 6 Base 7 Legs 8, 8a, 8b Hollow part 11 FPC plate 12 Conductive pattern 13 Small hole 14 Insertion hole 15 Case 15a Case back 16 LED element insertion hole 20 Protrusion 21 Solder

Claims (1)

[Scope of utility model registration request] 1. An LED device and a conductive pattern formed on the FPC plate are electrically connected by inserting a lead portion of the LED device into a small hole formed on the FPC plate and soldering them to accommodate various internal devices. The FPC board is provided along the case while inserting the LED element into the LED element insertion hole formed on the back surface of the case, and the LED element is mounted on a holder made of an elastic member. , The FPC board is inserted into and fitted into the insertion hole formed in the vicinity of the small hole of the FPC plate.
A leg portion for positioning and fixing the plate and the holder is integrally formed so as to hang down from the rear surface of the base portion of the holder, and a protrusion formed corresponding to the insertion hole is inserted in the rear surface of the case near the LED element insertion hole. The case and the holder on which the LED element fixed to the FPC plate is mounted are assembled, and the diameter of the protrusion is approximately the same as or slightly smaller than the diameter of the protrusion that passes through the tip of the protrusion from the surface of the base. A holder structure for an LED element, wherein a hollow portion is provided.