JPH06204351A - Package assembly of surface mounting type electronic part - Google Patents

Abstract

PURPOSE:To enable a terminal to be fixed and held at a fixed position between the case of an electronic part and a base plate. CONSTITUTION:A needle 7 is provided to the case 1 of a package protruding from the edge of a lower opening where a cutout 6 is provided, a protrudent edge 8 engaged with the cutout 6 is provided to a base plate 2, and a groove 9 where the needle 7 is fitted is provided onto the protrudent edge 8. A terminal 3 is provided with a terminal plate 3a and connected to an element 4 and a small hole 3c is provided to the terminal plate 3. The element 4 is housed in the case 1, the terminal plate 3a is fitted to the cutout 6, the needle 7 is plugged into the small hole 3c, and furthermore the protrudent edge 8 is engaged with the cutout 6 to join the base plate 2 to the case 1, whereby the terminal 3 is supported by the needle 7 so as not to get out of position or fall off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package assembly of surface mount type electronic parts for fixing terminals of an electronic element contained in a case in a fixed position.

[0002]

2. Description of the Related Art In a package built-in type electric component,
At the time of assembling the electronic component, the terminals of the device are also fixed to the package. Conventionally, the following method is generally known as a method of fixing a terminal to a package. That is, (1) a method of melting the resin protrusion 10a of the package 10 to fuse the terminal 11 to the package (FIG. 3A) (2) caulking the terminal 11 to the package 10 using a rivet or eyelet 12. Method (FIG. 3B) (3) A method of bending a part of the terminal 11 and locking the bent edge 13 to the package 10 (FIGS. 3C and 3D).

[0003]

However, in any of the above methods, there is a problem in that a special structure is used for fixing the terminals or a processing is required at the time of assembling. In particular, for surface mount electronic components, miniaturization is desirable because of the demand for high density mounting.
The structure of the parts needs to be as simple as possible.

An object of the present invention is to provide a package assembly of surface mount type electronic parts which can easily fix terminals with a simple structure.

[0005]

In order to achieve the above object, in a surface mount type electronic component package assembly according to the present invention, a surface mount type electronic component package assembly having a case, a bottom plate and a terminal is provided. The case is for accommodating an electronic element, the bottom plate is for sealing the case, and the case and the bottom plate have a notch on one side and a projecting edge on the other side, and the notch The needle is projectingly provided in the notch, the groove for receiving the needle is opened on the protruding edge, and the terminal is provided in the case. Which has an elastic contact piece to be connected to the electronic element and a terminal plate to be connected to an external wiring, and the terminal plate has a hole in a part thereof and is seated on the projecting edge so as to project to the outside of the case. The hole is for receiving the needle in the notch and connecting the case and the bottom plate to the terminal. It is intended to fix in place.

[0006]

[Function] The element is housed in the case, the terminal is fitted in the notch of the case, the needle in the notch is inserted into the hole of the terminal plate, the bottom plate is applied to the opening of the case, and the projecting edge of the case is put in the notch. By press-fitting, the protruding end of the needle from the terminal plate is fitted into the groove on the protruding edge to fix the terminal, and the case is sealed with the bottom plate.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the present invention includes a case 1, a bottom plate 2,
It is an assembly with the terminal 3, and the terminal 3 is electrically connected to the semiconductor element and other elements 4 by the elastic contact piece 3b. In the following examples, an example in which the element 4 is applied to a sounding body using a piezoelectric vibrator will be described.

The case 1 of the sounding body has a bottomless cylindrical shape, a sound output hole 5 is opened on the upper surface, and a notch 6 is formed on the opening edge of the bottom.
2 are provided in a face-to-face relationship with each other, and a needle 7 is projectingly provided in the notch 6 and integrally molded with a synthetic resin.

The bottom plate 2 has a disk shape to be fitted in the opening of the case 1, and has a rectangular projecting edge 8 to be engaged with the notch 6 of the case 1 on its peripheral edge. A groove 9 into which the needle 7 in the notch 6 is fitted is opened on the upper surface of the protruding edge 8.

The terminal 3 comprises a terminal plate 3a provided with an elastic contact piece 3b for connecting to an electrode of the piezoelectric vibrator 4, and the terminal plate 3a
A is bent to form an attachment portion a and an external wiring connection portion b. The mounting portion a is a portion to be mounted between the case 1 and the bottom plate 2, a small hole 3c into which the needle 7 is inserted is opened in the plate surface, and the external wiring connection portion b is projected to the outside of the case 1 for solder connection. It becomes a terminal.

In the embodiment, the piezoelectric vibrator 4 is attached to the case 1.
The elastic contact piece 3b of the terminal 3 is brought into contact with each electrode of the piezoelectric vibrator 4, and the mounting portion a of the terminal plate 3a is locked in the notch 6, and the needle 7 is inserted in the small hole 3c. Insert it. Next, the bottom plate 2 is applied to the opening of the case 1, and the projecting edge 8 thereof is aligned with the notch 6 of the case 1 to make the case 1
When pressed in, the piezoelectric vibrator 4 is held between the inner peripheral edge step of the case 1 and the rising edge of the bottom plate 2, the protruding edge 8 engages with the notch 6, and the terminal plate 3 a is inserted into the groove 9. The more protruding needle 7 is received, and the case 1 and the bottom plate 2 are integrally connected by sandwiching the terminal plate 3a. As a result, the terminal board 3a
Is held by the needle 7 inserted through the small hole 3c, and as shown in FIG. 2, the external wiring connection portion b is projected to the outside of the case 1 and fixed at a fixed position, and does not fall off even if an external force is applied.

In the above embodiments, the example applied to the package of the sounding body has been shown, but the present invention is not limited to this, and the same applies not only to general semiconductor elements, thermistors and varistors but also to packages of resistors and other elements. Applicable to The relationship between the notch and the ridge may be reversed.

[0013]

As described above, according to the present invention,
Since the terminal plate of the terminal is sandwiched between the projecting edge and the notch provided in the package case and the bottom plate and the needle is held through the terminal plate, there is no displacement of the terminal or dropout, and the structure is cut. Needles and needles need only be integrally formed in advance on the notch and the projecting edge, respectively, and no special additional structure is required to fix the terminals, so miniaturization is required for surface mount electronic component packages. It can be applied to and get excellent effect.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a partially enlarged cross-sectional view of the assembled package.

FIG. 3 is a diagram showing a conventional example of a terminal fixing method.

[Explanation of symbols]

 1 Case 2 Bottom Plate 3 Terminal 3a Terminal Plate 3b Elastic Contact Piece 3c Small Hole 4 Element (Piezoelectric Vibrator) 5 Sound Output Hole 6 Notch 7 Needle 8 Prong Edge 9 Groove

Claims (1)

[Claims] 1. A package assembly of a surface mount type electronic component having a case, a bottom plate and a terminal, wherein the case houses an electronic element, and the bottom plate seals the case. The case and the bottom plate have a notch on one side and a projecting edge on the other side, and are integrally joined by engaging the projecting edge in the notch, and the needle is provided in the notch. A groove for receiving the needle is opened on the protruding edge, and the terminal has an elastic contact piece for connecting to an electronic element in the case and a terminal plate for connecting to external wiring. There is a hole in a part of the hole that is seated on the protruding edge and protrudes outside the case.The hole receives the needle in the notch and holds the terminal in place when the case and bottom plate are joined. A surface mount type electronic component package assembly, characterized in that it is fixed to.