JPH0773775A - Lamination type electric part - Google Patents

Abstract

PURPOSE:To obtain a lamination type electric part, which can securely prevent the deformation of a second electric part arranged at a position relatively far from the loading surface of a printed substrate. CONSTITUTION:A fitting plate 8 having a fitting part 20 is fixed to a tact switch 3 as a first electric part at side close to a printed substrate 10, and a pulse switch 4 as a second electric part is laminated for integration on the tact switch 3, and a connecting member 4 is previously fixed to a second terminal 13, which is extended from the pulse switch 4, by the outserting method, and this connecting member 14 is bonded to the fitting part 20 by snaps to position and hold the relatively long second terminal 13 near the loading surface 11 of the printed substrate 10. Consequently, the second terminal 13 can be inserted to an insertion hole of the printed substrate 10 easily to improve the workability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated electric component having a plurality of laminated and integrated electric components each having a terminal and mounted on a printed circuit board.

[0002]

2. Description of the Related Art FIG. 8 is a sectional view showing a conventional example of this type of laminated electric component, which is described in Japanese Utility Model Laid-Open No. 62-120302. As shown in the figure, the laminated electric component is a first electric component 1 having a first terminal 1a.
(For example, a pulse switch) and a second electric component 2 (for example, a variable resistor) that has a second terminal 2a and is laminated and integrated on the first electric component 1. And the second electric components 1 and 2 are designed to be rotated by a common rotation axis A. Reinforcing ribs 1b and 2b are provided on the intermediate portion of the first terminal 1a and the intermediate portion of the second terminal 2a, respectively. These ribs 1b and 2b are provided.
Thus, the rigidity of the first and second terminals 1a and 2a is increased.

The laminated electric component having the above-described structure is mounted on a printed circuit board (not shown) with the first electric component 1 facing downward, and the first and second terminals 1a,
After the terminal 2a is inserted into the insertion hole of the printed board, the terminals 1a and 2a are soldered to the solder lands of the printed board to be mounted on the printed board. At that time, the first and second terminals 1a,
Since the reinforcing ribs 1b and 2b enhance the rigidity of the 2a, the terminals 1a and 2a can be easily inserted into the insertion holes of the printed circuit board.

[0004]

By the way, in the above-mentioned conventional laminated type electric component, the second electric component 2 is laminated and integrated on the first electric component 1, so that The second electric component 2 is considerably separated from the mounting surface of the printed circuit board, and the second terminal 2a extending outward from the second electric component 2 is inevitably long. Therefore, as described above, even if the rigidity of the second terminal 2a is increased by the reinforcing rib 2b, the deformation of the second terminal 2a is not always sufficiently prevented, and for example, during conveyance of the laminated electric component. When an external force is applied to the second terminal 2a, there is a problem that the second terminal 2a is deformed and cannot be inserted into the insertion hole of the printed board.

The present invention has been made in view of the circumstances of the prior art as described above, and an object thereof is to deform the terminals of the second electric component located relatively far from the mounting surface of the printed circuit board. The object of the present invention is to provide a laminated electric component capable of reliably preventing such a situation.

[0006]

In order to achieve this object, the present invention provides a first electric component having a first terminal,
A second electric component that has a second terminal and is laminated and integrated with the first electric component, and is mounted on a printed circuit board with the first electric component facing downward. In addition, in the laminated electric component in which the first terminal and the second terminal are soldered to the printed circuit board, an engaging portion is provided in the vicinity of a mounting surface on the printed circuit board, It is characterized in that the connecting member is fixed to the second terminal in advance, and these engaging portions and the connecting member are snap-connected.

[0007]

Before the assembling work of the laminated electric component, the engaging portion is provided in the vicinity of the mounting surface of the first electric component on the printed circuit board in advance, and the engaging portion is connected to the second terminal of the second electric component. The member is fixed, and then the second electric component is laminated and integrated on the first electric component. After that, when the connecting member fixed to the second terminal is snap-fitted to the engaging portion, the second terminal is held in the vicinity of the mounting surface on the printed circuit board, so that the deformation of the second terminal is surely performed. To be prevented.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a sectional view of a laminated electric component according to an embodiment of the present invention, FIG. 2 is an explanatory view showing a state in which the laminated electric component of FIG. 1 is mounted on a printed circuit board, and FIG. 3 is a laminated electric component of FIG. FIG. 4 is a plan view showing a state before bending the second terminal included in the component, FIG. 4 is a plan view showing a state after bending the second terminal shown in FIG. 3, and FIG. 5 is included in the laminated electric component shown in FIG. FIG. 6 is a plan view showing the attached plate, and FIG. 6 is a perspective view showing the connecting member of FIG. 4 and the attached plate of FIG.

The laminated electric component of this embodiment shown in FIG.
A first electric component, for example, a tact switch 3, a second electric component, for example, a pulse switch 4, mounted on one surface of the tact switch 3, a click section 5 mounted on the pulse switch 4, The bearing member 6 placed on the click portion 5, the rotary shaft 7 rotatably and slidably held by the bearing member 6, and the tact switch 3
And a mounting plate 8 mounted on the other surface. As shown in FIG. 2, the mounting plate 8, the tact switch 3, the pulse switch 4, the click portion 5, and the bearing member 6 are integrated via a pin 9 in a state where they are sequentially stacked coaxially. The laminated electric component is mounted on the printed circuit board 10 with the mounting plate 8 facing downward.

The tact switch 3 has a plurality of first terminals 12 extending outward, and these first terminals 12 are bent into an L shape and inserted into and held by the mounting plate 8. ing. On the other hand, the pulse switch 4 has a plurality of second terminals 13 extending outward, and these second terminals 13 are also bent in an L shape, but the first terminals 12 Its dimensions are longer than those of. A connecting member 14 is fixed to the tip portion of the second terminal 13, and the connecting member 14 is held by the mounting plate 8 as described later. As shown in FIG. 3, the connecting member 14
Engagement grooves 15 and 16 are formed at both ends of the pulse switch 4. When the casing of the pulse switch 4 is molded, the connecting member 14 is formed simultaneously with the casing by outsert molding. Pre-fixed to the terminal 13, and then, as shown in FIG.
As shown in FIG. 3, each second terminal 13 is bent downward at a substantially right angle together with the connecting member 14. At that time, the bending angle of the second terminal 13 is set to be slightly larger than 90 degrees, that is, an obtuse angle. Further, these second terminals 13 are formed integrally with the metal conductor of the pulse switch 4, and in the present embodiment, phosphor bronze with silver plating having a thickness of 0.12 mm is used. Therefore, as compared with the iron plate terminal that has been conventionally used, it has excellent elasticity and is hard to be deformed, and cracks are less likely to occur even when bent.

As shown in FIG. 5, the mounting plate 8 has a pair of elastic legs 1 which engage with the engaging grooves 15 and 16, respectively.
It is provided with an engaging portion 20 having 7 and 18, and an insertion hole 21 into which the first terminal 12 is inserted. Claws 22 and 23 capable of locking the connecting member 14 are provided at the tips of the elastic legs 17 and 18, respectively.
2 and 23 are opposed to each other. Furthermore, both claw portions 22,
Tapered surfaces 24 and 25 are formed on the tape 23. The distance between the opposed surfaces of the tapered surfaces 24 and 25 is gradually reduced in the direction of pushing the connecting member 14, that is, to the left in FIG. It is set.

In this embodiment, the tact switch 3, the pulse switch 4, the click portion 5,
When the bearing member 6 and the rotary shaft 7 are sequentially laminated, the pin 9 is inserted into these laminated bodies to integrate the above-mentioned members through the pin 9. At that time, the first terminal 12 of the tact switch 3 is inserted into the insertion hole 21 of the mounting plate 8, and the second terminal 13 of the pulse switch 4 is bent as shown in FIG. Then, the connecting member 14 which is fixed to the second terminal 13 in advance is pushed toward the mounting plate 8 to snap-connect the connecting member 14 to the engaging portion 20 of the mounting plate 8. At this time, the connecting member 14 is pushed to the left side of FIG.
The end portions of the engaging grooves 15 and 16 contact the tapered surfaces 24 and 25 of the claw portions 22 and 23, and the elastic legs 17 and 18 are pushed open. When the connecting member 14 is further pressed to the moving end, the claws 22 and 23 pass through the engaging grooves 15 and 16, respectively, and the elastic legs 17 and 18 are elastically moved by the elastic legs 17 and 18 to the initial state shown in FIGS. 5 and 6. 1 and 2, the connecting member 14 is locked by the claw portions 22 and 23. As described above, since the bending angle of the second terminal 13 is an obtuse angle, back tension acts on the connecting member 14 with respect to the engaging portion 20, and the claw portions 22 and 23 and the connecting member 14 are connected to each other. There is no play between them.

The laminated electric component thus assembled is placed on the printed circuit board 10 with the mounting plate 8 facing downward, as shown in FIG. 2, and the first terminal 12 and the second terminal 12 are attached. After the terminals 13 are inserted into the insertion holes of the printed board 10, the terminals 12 and 13 are soldered to the solder lands of the printed board 10 to be mounted on the printed board 10. At this time, the second terminal 13 is positioned in the vicinity of the mounting surface 11 of the printed circuit board 10 by the coupling member 14 being snap-coupled to the engaging portion 20 of the mounting plate 8. It is possible to easily insert not only the terminal 12 but also the long second terminal 13 into the insertion hole of the printed circuit board 10.

In the above embodiment, although the pulse switch 4 is located away from the mounting surface 11 of the printed circuit board 10 and the second terminal 13 is relatively long, The second terminal 13 can be positioned and held in the vicinity of the mounting surface 11 of the printed circuit board 10 by a simple operation of snap-connecting the connecting member 14 fixed in advance to the engaging portion 20 of the mounting plate 8. . Therefore, for example, even when an external force is applied to the second terminal 13 during the transportation of the laminated electric component, the deformation of the second terminal 13 can be reliably prevented. Further, since the mounting plate 8 is laminated and integrated on the lower surface of the tact switch 3 which is the first electric component,
The existing tact switch 3 can be used as it is, and an increase in cost can be suppressed.

Although the tact switch 3 is used as the first electric component and the pulse switch 4 is used as the second electric component in the above embodiment, the tact switch 3 and the pulse switch 4 are used. It goes without saying that other electric components such as a variable resistor may be used instead.

In the above embodiment, the case where only the second terminal 13 extending from the pulse switch 4 which is the second electric component is held by the engaging portion 20 has been described, but the electric component having the terminal is described. The same applies when two or more are laminated on the first electric component. For example, the first electric component 3
On the other hand, when two second electric components 4 are stacked,
As shown in FIG. 5, the connecting members 14 are fixed in advance to all the terminals 13 except the first terminals 12, and the connecting members 14 are attached to the engaging portions 2 respectively.
It may be snap-connected to 0.

Further, in the above embodiment, the elastic legs 17 and 18 in which the engaging grooves 15 and 16 of the connecting member 14 are provided in the mounting plate 8.
Although the case of snap-fitting is explained, conversely, elastic legs may be provided on the connecting member 14 side and engagement grooves that engage with the elastic legs may be provided on the mounting plate 8 side.

Furthermore, in the above embodiment, the connecting member 1
The case where the engaging portion 20 snap-fitted to the mounting plate 4 is provided on the mounting plate 8 has been described, but the engaging portion 20 may be located in the vicinity of the mounting surface 11 of the printed circuit board 10, and for example, the mounting plate 8 It is also possible to omit and omit, and to provide an engaging portion on the switch block of the tact switch 3, which is the first electric component.

[0019]

As described above, according to the present invention, the connecting member is preliminarily fixed to the second terminal 13 of the second electric component located at a position away from the mounting surface of the printed circuit board, and the connecting member is attached. The second terminal is located near the mounting surface of the printed circuit board by a simple operation of snap-connecting the connecting member to the engaging portion provided in the mounting surface of the printed circuit board. It can be positioned and held at. Therefore, for example, even when an external force is applied to the second terminal during the transportation of the laminated electric component, the second terminal is surely prevented from being deformed, and when the second terminal is mounted on the printed board, the second terminal is connected to the printed board. It can be easily inserted into the insertion hole.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a laminated electric component according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a state in which the laminated electric component of FIG. 1 is mounted on a printed board.

3 is a plan view showing a state before bending a second terminal provided in the laminated electric component of FIG. 1. FIG.

FIG. 4 is a plan view showing a state after bending the second terminal of FIG.

5 is a plan view showing a mounting plate included in the laminated electric component of FIG. 1. FIG.

6 is a perspective view showing the connecting member of FIG. 4 and the mounting plate of FIG.

FIG. 7 is an explanatory view showing a state in which a laminated electric component according to another embodiment of the present invention is mounted on a printed board.

FIG. 8 is a cross-sectional view of a laminated electric component according to a conventional example.

[Explanation of symbols]

 3 Tact Switch (First Electrical Component) 4 Pulse Switch (Second Electrical Component) 10 Printed Circuit Board 11 Placement Surface 12 First Terminal 13 Second Terminal 14 Connecting Member 17, 18 Elastic Leg 20 Engaging Part 22 , 23 Claw 24, 25 Tapered surface

Claims (1)

[Claims] 1. A first electric component having a first terminal,
A second electric component that has a second terminal and is laminated and integrated with the first electric component, and is mounted on a printed circuit board with the first electric component facing downward. In addition, in the laminated electric component in which the first terminal and the second terminal are soldered to the printed circuit board, an engaging portion is provided in the vicinity of a mounting surface on the printed circuit board, A laminated electric component, wherein a connecting member is fixed to the second terminal in advance, and these engaging portions and the connecting member are snap-connected.