JPH08191192A - Electronic component retaining equipment - Google Patents

Abstract

PURPOSE: To make an independent holder unnecessary, reduce the number of components and realize cost reduction, by maintaining the attitude of an LED with a protrusion of a chassis which penetrates a printed board. CONSTITUTION: Protrusions 4a are collectively formed in one body to a chassis 4 together with a positioning boss 4b. Square holes 3c are made on a printed board 3 together with a positioning hole 3d. Lead legs 1a of an LED 1 are inserted into holes 3a of the printed board 3 and soldered together with other electronic components. In the state that the printed board 3 is fixed on the chassis 4, the boss 4b is engaged with the hole 3d, the protrusions 4a penetrate the square holes 3c, and the attitude of the LED 1 is maintained with the protrusions 4a. The inner sides of the protrusions 4a are sloped. When the LED 1 is slantingly mounted on the printed board 3, the attitude is corrected when the printed board 3 is fixed on the chassis 4, and the LED 1 is maintained in the normal attitude.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holding device for holding electronic parts such as LEDs (light emitting diodes) used in VTRs (video tape recorders) and the like.

[0002]

2. Description of the Related Art Generally, in a VTR or the like, a photocoupler for detecting an end portion of a magnetic tape is used, as shown schematically in FIG. In FIG. 3, reference numeral 1 is an LED which emits infrared rays, 2 is a sensor which detects infrared rays, and 3
Is a printed circuit board on which electronic parts such as the LED 1 and the sensor 2 are mounted, and a pattern wiring is provided on the lower surface in the drawing. Reference numeral 4 is a chassis for assembling the entire apparatus, 5 is a mechanical chassis for supporting a cassette tape winding mechanism and the like (not shown), 6 is a light emitting prism fixed to the mechanical chassis 5, 7 is a light receiving prism, 8 Is a cassette. The leader part and the trailer part corresponding to the beginning and end of the magnetic tape stored in the cassette 8 are made of a material through which infrared rays can pass.

In the above-mentioned figure, the infrared rays emitted from the LED 1 travel along the arrow a, are refracted at the end of the light emitting prism 6 and are divided into two directions, and the arrows b1 and b2.
Follow along. The trailer part is the prisms 6, 7
In the vicinity of the end of the magnetic tape, that is, in the vicinity of the end of the magnetic tape, the infrared rays in the direction of the arrow b1 pass through the trailer portion to reach the prism 7 and proceed in the direction of the arrow c to be detected by the sensor 2. . Although not shown in the drawing, the infrared rays traveling in the direction of the arrow b2 are detected by passing through the reader section, and the structure thereof is the same as that of the trailer section.

By the way, the LED 1 and the sensor 2 have directivity. Therefore, in the conventional device of this type, the positions thereof are held so that the LED 1 and the sensor 2 emit infrared rays toward the prisms 6 and 7, respectively. FIG. 4 is for explaining the directivity of the LED 1, and a sufficient amount of infrared rays are emitted within the range of the angle θ. Regarding this directivity, the sensor 2 also has substantially the same characteristics.

Conventionally, the holders shown in FIGS. 5 and 6 have been used to hold the posture of the LED 1 and the like.
FIG. 5 shows the assembled state, and FIG. 6 shows the disassembled state before the assembly. In the figure, reference numeral 9 is a holder, which has a hole on the top surface having a diameter slightly larger than the head of the LED 1 and a hook on the lower portion. The lead legs 1a of the LED 1 are bent and formed. The lead legs 1a are inserted into the holes 3a of the printed board 3 and soldered together with other electronic components in an automatic soldering bath or the like. In addition, the above-mentioned hooks are the square holes 3b of the printed circuit board 3.
When the holder 9 is inserted into the printed circuit board 3,
Attached to.

[0006]

In the conventional device of this type, since the independent holder is used as described above, the number of parts is increased and the cost is increased. The present invention has been made in view of the above problems, and an object thereof is to provide a holding device for electronic components such as LEDs, which has a small number of components and is inexpensive.

[0007]

SUMMARY OF THE INVENTION To solve the above problems and to achieve the above object, an electronic component holding device of the present invention is a printed circuit board having lead legs of electronic components such as LEDs soldered to a chassis. An electronic component holding device configured to hold the posture of the electronic component when fixed, wherein the electronic component holding device includes a protrusion for a holder that is integrally raised with the chassis and is raised from the chassis, and a printed circuit board is attached to the chassis. In the fixed state, so that the protrusion penetrates,
This printed circuit board is provided with a hole, and the electronic component is held by the protrusion in a state where the printed circuit board is fixed to the chassis.

[0008]

In the electronic component holding device configured as described above, by fixing the printed circuit board to the chassis, the protrusion penetrates the hole, and the electronic component mounted on the printed circuit board is held by the protrusion. To be done.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIG. 1A shows an assembled state, and FIG. 1B shows a disassembled state before assembly. In the figure, reference numeral 4a is a protrusion, and 4b is a positioning boss, which are integrally formed with the chassis 4 and are raised from this chassis. 3c is a square hole and 3d is a positioning hole, which are provided on the printed circuit board 3. Reference numeral 1 is the LE described above
The lead leg 1a has a curved shape. The lead legs 1a are inserted into the holes 3a of the printed board 3 and soldered together with other electronic components in an automatic soldering bath or the like. The printed circuit board 3 is fixed to the chassis 4 by a known means.

As shown in FIG. 1A, when the printed circuit board 3 is fixed to the chassis 4, the boss 4b is removed.
Is fitted into the positioning hole 3d, and the protrusion 4a is penetrated into the square hole 3c.
The posture of 1 is maintained. The inside of the protrusion 4a is an inclined surface, and even if the LED 1 is inclined and mounted on the printed circuit board 3, when the printed circuit board 3 is fixed to the chassis 4, the attitude is corrected and the normal attitude is maintained. To be done.

Even if there is no holder, the LED 1 maintains its posture in the forming direction by the bent lead legs 1a, but the posture is likely to change in the direction orthogonal to the forming direction. For this reason,
In the above-described embodiment, the projection 4a is provided on the lead leg 1a of the LED 1 at a position orthogonal to the forming direction.

In the above embodiment, the sloped surface is provided inside the projection 4a. However, as shown in FIG. 2, a stepped portion for receiving the bottom surface of the LED 1 is provided at the lower end of the sloped surface inside the projection 4a.
The posture of the LED 1 can be corrected more reliably.

[0013]

Since the present invention is configured as described above, the attitude of electronic parts such as LEDs can be reliably maintained at a low cost.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, (a)
Is a schematic front view of an assembled state, and (b) is a schematic exploded perspective view before assembly.

FIG. 2 is a schematic front view showing another embodiment of the present invention.

FIG. 3 is a schematic front view showing a conventional example.

FIG. 4 is a diagram for explaining light emission characteristics of LEDs.

FIG. 5 is a schematic front view showing a conventional example.

FIG. 6 is a schematic exploded perspective view showing a conventional example.

[Explanation of symbols]

 1 LED 1a lead leg 2 sensor 3 printed circuit board 3a hole 3b square hole 3c square hole 3d positioning hole 4 chassis 4a protrusion 4b positioning boss 5 mechanical chassis 6 light emitting prism 7 light receiving prism 8 cassette 9 holder

Claims (1)

[Claims] 1. An electronic component holding device for holding a posture of an electronic component such as an LED when the printed circuit board to which lead legs of the electronic component are soldered is fixed to the chassis. A holder protrusion that is integrally raised with the chassis, and a hole is formed in the printed circuit board so that the protrusion penetrates when the printed circuit board is fixed to the chassis. An electronic component holding device, wherein the electronic component is held by the protrusion in a state of being fixed to the chassis.