JPH0148658B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a case housing method for an electronic component, in which an element body of an electronic component such as a piezoelectric resonator that performs mechanical vibration is housed in a hollow exterior case, and a case structure thereof.

Traditionally, in electronic components such as integrated circuits,
External packaging is done using transfer molding, etc. in which epoxy resin is poured into a mold, but the element bodies of electronic components such as piezoelectric resonators and acoustic bars, which require a space inside to allow mechanical vibration, are formed using transfer molding. It was difficult to cover it with armor.

Therefore, in order to package the element body of this type of electronic component, it is recommended to use a pair of ceramic or other outer cases that have been formed into a hollow structure in advance, and then bond these outer cases together using low-melting glass or adhesive. However, as electronic components become smaller and outer cases become smaller, it not only becomes difficult to apply low-melting glass and adhesives, but also the accuracy of alignment between the outer cases deteriorates, and the curing time of the adhesive becomes shorter. The disadvantages were that the process was long, the curing temperature was high, and the production efficiency was low. Furthermore, the outer case and terminal frame have different structures depending on whether the terminal has a dual in-line shape or a single in-line shape, and it has been difficult to standardize the outer case and the terminal frame.

The purpose of the present invention is to simplify the assembly of electronic components whose element bodies undergo mechanical vibration and improve assembly accuracy, and to enable common use of the outer case for dual-in-line and single-in-line terminal shapes. .

Another object of the present invention is to enable the terminal frame to be used as it is as a lead terminal for an electronic component, and to allow the lead terminal to be attached at the same time as the element body of the electronic component is housed in an exterior case. .

To summarize the present invention, there is provided a pair of upper and lower exterior cases, each of which is made of thermoplastic resin and which, when combined, forms a recess for accommodating the element body of an electronic component therein, and an opening periphery of each recess of these exterior cases. A frame body that is continuous in a loop shape, including a portion that extends along the outer case, and a plurality of protruding portions that protrude in a bifurcated manner to the outside of the outer case, and a frame body that is pulled inward from this frame body to support the element body. At the same time, a terminal frame consisting of a plurality of support pieces conductively connected to each electrode of the element body and a plurality of lead terminals drawn outward from the frame is prepared, and the frame of the terminal frame is The opening end faces of a pair of upper and lower exterior cases were aligned with each other on both sides, and the frame was interposed between the two exterior cases, and the terminal frame was made to generate heat to melt the opening end faces of the exterior cases and weld them together. After that, the loop-shaped portion is cut by cutting the fork-shaped portion of the frame body that protrudes from the exterior case so that each electrode of the element body and the corresponding lead terminal are electrically connected and disconnected from the others. This is a method of accommodating an electronic component case, which is characterized by separating the frame.

The present invention also provides a pair of upper and lower exterior cases, each of which is made of thermoplastic resin and which, when combined, forms a recess for accommodating an element body of an electronic component therein; A frame body continuous in a loop shape including a portion extending along the outer case and a plurality of protruding portions protruding in a fork shape to the outside of the outer case; , a terminal frame consisting of a plurality of support pieces conductively connected to each electrode of the element body and a plurality of lead terminals drawn outward from the frame, and a terminal frame on both sides of the frame of the terminal frame. The opening end surfaces of the upper and lower pair of exterior cases are aligned with each other, and the frame is interposed between the two exterior cases, and the opening end surfaces of the exterior cases are welded to each other by the heat generated by the terminal frame. Each electrode is electrically connected to the corresponding lead terminal, and is cut off from the others, and the forked portion of the frame body that protrudes from the exterior case is cut to separate the loop-shaped frame body. It is an electronic component.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment in which the present invention is applied to a vibrator.

In FIG. 1, 11 is a vibrator, 12 is a terminal frame that supports the vibrator 11, 13,
Reference numeral 14 denotes an exterior case that houses the above-mentioned vibrator.

The above-mentioned sound piece vibrator 11 has a frame 15 having a rectangular shape, which is formed by punching a constant elastic metal plate such as Elinvar.
A rectangular sound piece vibrator main body 17 is supported at its vibration nodes by connectors 16a to 16d, and one main surface of the sound piece vibrator body 17, the connector 16a, and the connector Frame body 15 connected to 16a
A piezoelectric film 18 made of a piezoelectric material such as zinc oxide (ZnO) is formed on a part of the electrode, and a drive electrode film 19a, a lead electrode film 19b, and an extraction electrode film 19c are formed on this piezoelectric film 18. Lead electrode film 19
b, the piezoelectric film 18 under the extraction electrode film 19c functions as an insulating layer.

On the other hand, the terminal frame 12
Peripheral surfaces 13b, 14b of the opening end surfaces of the recesses 13a, 14a of the pair of upper and lower exterior cases 13, 14 having square recesses 13a, 14a for accommodating the
Support pieces 20a to 20d, which have a substantially rectangular loop shape along the inside and support the acoustic bar vibrator 11, protrude rotationally symmetrically, while the openings of the exterior cases 13 and 14 extend from their four corners. Projections 21a, 21b, 21c, 2 having a roughly U-shape projecting outward from the peripheral surfaces 13b, 14b of the end faces.
1d respectively, and these respective protrusions 21a, 2
Lead terminals 22a, 2 from 1b, 21c, 21d
2b, 22c, and 22d are made to protrude, respectively.

The outer cases 13 and 14 are made of thermoplastic resin such as polycarbonate, polyacetal, polyethylene, etc. and are molded into rectangular plate shapes having the recesses 13a and 14b on one main surface.

Between the outer cases 13 and 14, as shown in FIG.
0d is welded to the frame 15 of the vibrator 11, connected and fixed with conductive adhesive (not shown), etc.
The terminal frame 12 in which the supporting piece 20a is connected to the lead electrode film 19b of the transducer main body 17 by soldering, bonding, conductive adhesive, mere contact, etc. is interposed, and in this state, the terminal frame 12 The temperature of the terminal frame 12 is raised by passing a current through it to generate heat or by performing induction heating.

When the temperature of the terminal frame 12 increases, the contact portions of the peripheral surfaces 13b and 14b of the open end surfaces of the outer cases 13 and 14 with the terminal frame 12 melt.

Thereafter, when the heating of the terminal frame 12 is stopped and the temperature is lowered, the outer cases 13, 1
4 are bonded to each other with the melted thermoplastic resin of the outer cases 13 and 14.

Next, as an example, the terminal frame 1
The protrusion 21a among the protrusions 21a to 21d of 2
The inner leg _{21a 2} of the pair of legs 21a ₁ and 21a ₂ is cut as shown by the dotted line in FIG _. The leg portion _21b2 is cut as shown by the dotted line in FIG. Then, the lead terminals 22a, 22b and the drive electrode film 19a are electrically connected, and the lead terminals 22c, 22
d and the tuning fork vibrator main body 17 are electrically connected.

Each of the protrusions 21a to 21 of the terminal frame 12
By bending each lead terminal 22a to 22d at a right angle to the outer case 14 side and cutting each lead terminal 22a to 22d to an appropriate length, a vibrating element vibrating component having a dual in-line terminal structure can be obtained.

Further, as described above, before bending each of the protrusions 21a to 21d of the terminal frame 12 at a right angle to the exterior case 14 side, among the protrusions 21a to 21d of the terminal frame 12, the exterior case 13, 14
By removing the protrusions 21b and 21c that protrude on one side, lead terminals 22a and 22d that protrude on the other side of the outer cases 13 and 14 make it possible to obtain a vibrating unit having a single in-line terminal structure. Can be done.

With the above method, it is possible to efficiently assemble vibrating element components having dual-in-line type and single-in-line type terminal structures using simple outer cases 13 and 14 having a common shape.

By the way, as before, the outer case 13,1
Depending on the adhesive, it takes a considerable amount of temperature and time to bond the outer cases 13 and 14 with an adhesive, but in the above embodiment, the outer cases 13 and 14 can be bonded in 1 to 10 seconds. .

In addition, in the above embodiment, the exterior frame 13
does not necessarily have to be loop-shaped, and may be partially cut.

The supporting pieces 20c and 20d may be arranged as shown in FIG. That is, the support piece 20c is made to protrude from the terminal frame 12 so as to be parallel to the support piece 20b,
The support piece 20d is made to protrude from the terminal frame 12 at a position where it butts against the support piece 20a. Support piece 20a~
Which of the pair of legs of the protrusions 21a to 21d the protrusion 20d should protrude from and which leg should be cut depends on the type of internal element and the lead terminals 22a to 22d.
2d to which the lead-out portion of the internal element is connected.

Further, the present invention provides the vibrating unit vibrator 11 in the outer case 1.
The present invention is not limited to the above-mentioned embodiment in which the case is housed in a case, but can be widely applied to cases in which elements that require internal space, such as elements that perform mechanical vibration such as piezoelectric resonators, are housed in the case. .

As is clear from the detailed description above, the present invention heats and welds together terminal frames with an exterior case made of thermoplastic resin interposed therebetween, which is different from the conventional exterior case. Unlike adhesion, it does not require the application of low-melting point glass or adhesive, and there is no need to apply adhesive on the exterior case, making the exterior case more compact and making the work of gluing the exterior case extremely easy. Adhesion accuracy can also be greatly improved.

In addition, because the temperature of the terminal frame is raised to weld the outer cases together without using adhesives, the bonding time is greatly shortened, and the production efficiency of electronic components is also greatly improved. be able to.

Furthermore, by using a terminal frame with lead terminals protruding from both sides of the outer case, electronic components with arbitrary terminal structures such as single-in-line and dual-in-line can be produced using a common outer case. .

Furthermore, according to the present invention, the terminal frame functions as an external lead-out terminal for drawing out the electrodes of the element body of the electronic component, so the terminal frame can be used as it is as a lead terminal of the electronic component. It is possible to obtain a case structure for an electronic component in which lead terminals can be attached at the same time as housing the element body of the component in an exterior case.

Electronic components that require hollow packages have a wide range of applications, including reed switches, reed relays, bimetals, and pressure sensors.

Further, due to the nature of the electronic component, the lead terminal, the terminal frame, and the electronic component element material may be integrally molded from the same metal body.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of an embodiment in which the present invention is applied to a case housing method for a vibrating unit and its case structure, FIG. 2 is an explanatory diagram of the assembly of the vibrating unit shown in FIG. 1, and FIG. It is a top view of a terminal frame. 11... Sound piece vibrator, 12... Terminal frame,
13, 14...Exterior case (13a, 14a...
recess), 17... sound piece vibrator body, 20a, 20
b...Support piece.

Claims (1)

[Scope of Claims] 1. A pair of upper and lower exterior cases, each of which is made of thermoplastic resin and which, when combined, form a recess for accommodating the element body of the electronic component therein, and the opening periphery of each recess of these exterior cases. A frame body that is continuous in a loop shape, including a portion that extends along the outer case, and a plurality of protruding portions that protrude in a bifurcated manner to the outside of the outer case, and a frame body that is pulled inward from this frame body to support the element body. At the same time, a terminal frame consisting of a plurality of support pieces conductively connected to each electrode of the element body and a plurality of lead terminals drawn outward from the frame is prepared, and the frame of the terminal frame is The opening end faces of a pair of upper and lower exterior cases were aligned with each other on both sides, and the frame was interposed between the two exterior cases, and the terminal frame was made to generate heat to melt the opening end faces of the exterior cases and weld them together. After that, the loop-shaped portion is cut by cutting the fork-shaped portion of the frame that protrudes from the exterior case so that each electrode of the element body and the corresponding lead terminal are electrically connected, and the others are cut off. A method for accommodating a case for electronic components, characterized by separating a frame. 2 A pair of upper and lower exterior cases, each made of thermoplastic resin, which when combined form a recess for accommodating the element body of the electronic component therein; A continuous frame body in a loop shape including an extending portion and a plurality of protruding portions protruding in a bifurcated manner to the outside of the exterior case, and a frame body that is pulled inward from this frame body to support the element body, and each of the element body A terminal frame includes a plurality of support pieces conductively connected to the electrodes and a plurality of lead terminals drawn outward from the frame, and a pair of upper and lower exterior cases are provided on both sides of the frame of the terminal frame. The frame body is interposed between the two outer cases so that the opening end surfaces of the terminal frames match each other, and the opening end surfaces of the outer cases are welded to each other due to the heat generated by the terminal frame, and the opening end surfaces of the outer cases are welded to each other, and the opening end surfaces of the outer cases correspond to each electrode of the element body. An electronic component in which the loop-shaped frame is separated by electrically conducting with the lead terminal and being cut off from the others, and by cutting off a portion of the frame that protrudes in a fork shape from the exterior case.