JPH1141058A - Piezoelectric component and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface mount (SMD) piezoelectric component in which a self-alignment effect is enhanced in reflow soldering. SOLUTION: Both faces opposite to each other of an inner space 12 of an inner case 1 are opened. Projections 131-134 are provided on inner wall faces 121-124 of a frame 11. A piezoelectric vibrator 2 is contained in the inner space 12 is the frame 11 where nodes and their vicinities correspond to the projections 131-134. First and second terminal boards 3, 4 have missing parts 311-314 at the circumference and the missing parts 311-314 are fitted to the projections 131-134. First and second openings 52, 53 are provided on both side faces of the outer case 5. The 1st terminal board 3 is led through the 1st opening 52 and the 2nd terminal board 4 is through the 2nd opening 53 in opposite directions to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piezoelectric component used for, for example, an oscillator or the like and a method for manufacturing the same.

[0002]

2. Description of the Related Art Piezoelectric components of this type are disclosed, for example, in
-111317. Also, JP-A-9-51243
Japanese Patent Application Laid-Open Publication No. H11-216,199 discloses a piezoelectric component having a structure suitable for surface mounting (SMD). The SMD structure disclosed in Japanese Patent Application Laid-Open No. 9-51243 is basically the same as the structure disclosed in Japanese Utility Model Laid-Open No. 59-111317, in which a so-called gull wing is formed by pulling out a terminal that has been pulled out from one opening. It is molded into a type and is compatible with SMD.

[0003] However, the above-mentioned known technique (Japanese Unexamined Patent Publication No.
No. 51243), the self-alignment effect of the product position cannot be expected by reflow soldering because the lead-out terminal is drawn out only from one side of the case. Therefore, a self-alignment effect can be obtained by using a dummy electrode (a method of fitting a metal part or a method of applying a solderable resin paste) to the other end of the case.
Like a flow solder part, the part was previously bonded to a printed circuit board with an adhesive. Alternatively, SMD
Even though it was a component, it was manually soldered.

In addition, since the lead terminal has a gull-wing structure drawn out to only one side, if the terminal tip is deformed and the parallelism of the terminal is slightly deteriorated, a soldering failure occurs during soldering at the time of mounting. There was a problem, and it was necessary to suppress the terminal parallelism to 0.1 mm or less.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a piezoelectric component for SMD which can exhibit a self-alignment effect in reflow soldering.

Another object of the present invention is to provide a piezoelectric component which does not suppress vibration of a piezoelectric vibrator and does not cause vibration disturbance.

Still another object of the present invention is to provide a piezoelectric component which can secure a stable oscillation frequency, resonance resistance, and the like.

[0008]

To solve the above-mentioned problems, a piezoelectric component according to the present invention comprises an inner case, a piezoelectric vibrator, a first terminal plate, a second terminal plate, and an outer case. Case.

The inner case has an inner space and a frame portion. The internal space has openings on opposite sides. The frame portion defines the internal space, has a substantially rectangular shape, has four inner wall surfaces that define the internal space, and has a projection on each of the inner wall surfaces.

[0010] The piezoelectric vibrator has electrodes on opposing surfaces, has a substantially rectangular shape, and has a noise generated on each of four sides.
Or the vicinity thereof is accommodated in the internal space of the frame portion in a relationship corresponding to the projection.

[0011] Each of the first terminal plate and the second terminal plate is disposed on the both sides of the piezoelectric vibrator and is in pressure contact with the electrode, and the electrode contact portion has a plurality of missing portions in the periphery. And each of the missing portions is fitted with each of the protrusions.

The outer case has a storage space, and has a first opening and a second opening connected to the storage space on both sides.

The inner case, the piezoelectric vibrator, the first
The assembly of the terminal plate and the second terminal plate is housed in the housing space of the outer case, and the first terminal plate and the second terminal plate are connected to the first opening and the first opening. They are led out through the second opening in opposite directions.

As described above, the inner case has an opening on both sides facing the inner space, the frame defines the inner space, and the piezoelectric vibrator has electrodes on the opposite sides. It is stored in the space. Each of the first terminal plate and the second terminal plate is arranged on both sides of the piezoelectric vibrator and is in pressure contact with an electrode. With this structure, a piezoelectric component can be obtained in which the piezoelectric vibrator and the pair of terminal plates are integrated on the inner case and are electrically connected.

The outer case has a storage space, and has a first opening and a second opening connected to the storage space on both sides. According to this structure, it is possible to obtain a piezoelectric component having a structure in which the assembly of the inner case, the piezoelectric vibrator and the terminal plate is incorporated into the outer case through the opening of the outer case.

The first terminal plate and the second terminal plate are led out in opposite directions through the first opening and the second opening. According to this structure, both ends of the end of the first terminal plate and the end of the second terminal plate, which are led out in opposite directions, become opposite terminals of the piezoelectric component. Exhibits an alignment effect.

The frame portion of the inner case has a substantially square shape, has four inner wall surfaces defining an inner space, and has a projection on each of the inner wall surfaces. Nodes formed on each of the four sides or its vicinity are accommodated in the internal space of the frame portion in a relationship corresponding to the projections. According to this structure, the piezoelectric vibrator can be incorporated in the case without causing a characteristic change due to contact with the inner case, and the vibration of the piezoelectric vibrator can be suppressed and a vibration disturbance can occur. Absent.

In each of the first terminal plate and the second terminal plate, the electrode contact portion has a plurality of missing portions around the periphery, and each of the missing portions is fitted with each of the projections. For this reason, each of the first terminal plate and the second terminal plate is fitted inside the inner case by a plurality of fittings of the notch and the projection inside the inner case. It is positioned so that the center of the terminal plate is located substantially at the center of the terminal. By the positioning of the terminal plate and the positioning with the piezoelectric vibrator described above, the terminal plate can be brought into pressure contact with the electrode of the piezoelectric vibrator at the center of the piezoelectric vibrator. Thereby, a stable oscillation frequency, a resonance resistance, and the like can be secured.

As a specific mode, the first opening of the outer case is an opening corresponding to the thickness of the first terminal plate. Accordingly, the first terminal plate is guided to the outside of the outer case in a state where its periphery is supported by the first opening, so that the support stability of the first terminal plate is enhanced. Further, since the first opening of the outer case corresponds to the thickness of the first terminal plate,
It is possible to prevent the sealing material from entering the storage space from the opening.

The second opening is an opening corresponding to the thickness of the assembly of the inner case, the piezoelectric vibrator and the second terminal plate. Therefore, the assembly of the inner case, the piezoelectric vibrator and the second terminal plate can be housed in the housing of the outer case through the second opening. Therefore, the assembling is facilitated.

Preferably, the first opening and the second opening are sealed with a resin. According to this structure, since the housing portion of the outer case is shielded by the resin, the reliability and durability of the piezoelectric vibrator housed in the housing member are improved.

The first terminal plate and the second terminal plate have terminal portions, and the terminal portions are bent along the outer surface of the outer case. According to this structure, it is possible to avoid bending, positional fluctuation, and the like of the terminal portions of the first terminal plate and the second terminal plate, and obtain a piezoelectric component suitable for SMD having a predetermined size.

Each of the first terminal plate and the second terminal plate has a terminal portion, and the terminal portion is bent along the outer surface of the outer case. May be bent in a direction away from the fabric.

As another mode, the first terminal plate and the second terminal plate
In the terminal board, the terminal portion may be guided along the side surface of the outer case, and the tip may be fitted in a concave portion provided at the bottom of the outer case. With such a structure, a piezoelectric component suitable for SMD with a minimum mounting area can be obtained.

In the present invention, a piezoelectric vibrator is basically an element utilizing a plane-spreading vibration mode.

The first terminal plate has a projection which comes into contact with the electrode of the piezoelectric element, and has a flat shape except for the projection. The second terminal plate has a contact projection for contacting the electrode of the piezoelectric vibrator and a dome-shaped portion for obtaining spring properties. This allows
A piezoelectric component is obtained in which the first terminal plate and the second terminal plate are brought into pressure contact with the electrodes of the piezoelectric vibrator by utilizing the spring property generated in the second terminal plate. Even if the first terminal plate has a spring property, the same operation and effect can be obtained.

The piezoelectric component according to the present invention is manufactured by the following steps. First, in the first step,
The first terminal plate is passed through the first opening of the outer case.
The first terminal plate is arranged at a distance from the first frame, and the outer case has a storage space, and a first opening and a second opening connected to the storage space on both sides. It has an opening.
The first terminal plate extends through the first opening of the outer case.

In the second step, the inner case is arranged on the second terminal plate. The second terminal plate is disposed at a distance from the second frame, and the inner case has an inner space and a frame portion, and the inner space has openings on opposite sides. The frame defines an internal space.

In the third step, the piezoelectric vibrator is housed in the inner case arranged on the second terminal plate. The piezoelectric vibrator has electrodes on opposing surfaces, and one of the electrodes contacts the second terminal plate.

In a fourth step, an assembly of the first terminal plate and the outer case obtained in the first step,
The second terminal plate, the inner case and the assembly of the piezoelectric vibrator obtained through the second and third steps are opposed to each other. The first terminal plate is positioned above the other of the electrodes of the piezoelectric vibrator, and the outer case is slid while applying a compressive force to the first terminal plate and the second terminal plate. The terminal board, the inner case, the piezoelectric vibrator, and the second terminal board are housed in the inner space of the outer case.

According to this manufacturing method, the piezoelectric component according to the present invention can be easily obtained.

[0032]

FIG. 1 is an exploded perspective view of a piezoelectric component according to the present invention, FIG. 2 is a partial sectional view of the piezoelectric component according to the present invention shown in FIG. 1, and FIG. 3 is shown in FIGS. FIG. 4 is a perspective view showing an assembled state of an inner case, a piezoelectric vibrator, and a terminal plate in the piezoelectric component according to the present invention.

The piezoelectric component according to the present invention comprises: an inner case 1;
Piezoelectric vibrator 2, first terminal plate 3, second terminal plate 4
And an outer case 5.

The inner case 1 has an inner space 12 and a frame portion 11.
And The internal space 12 is opened on both opposite sides. The frame portion 11 defines an internal space 12, is substantially rectangular, and has four inner wall surfaces 12 that define the internal space 12.
1 to 124, and have projections 131 to 134 on the inner wall surfaces 121 to 124, respectively.

The piezoelectric vibrator 2 has electrodes 2 on opposite surfaces.
Nodes 1 and 22 have a substantially square shape, and the nodes formed on each of the four sides or the vicinity thereof are housed in the internal space 12 of the frame portion 11 in a relationship corresponding to the projections 131 to 134.

Each of the first terminal plate 3 and the second terminal plate 4 is arranged on both sides of the piezoelectric vibrator 2,
1, 22 and the electrode contact portion has a plurality of missing portions 311 to 314 in the periphery, and the missing portions 311 to 314
Are fitted with each of the projections 131 to 134.

The outer case 5 has a storage space 51, and a first opening 52 connected to the storage space 51 and a second opening 52 on both sides.
The opening 53 is provided.

The assembly of the inner case 1, the piezoelectric vibrator 2, the first terminal plate 3 and the second terminal plate 4 is housed in the housing space 51 of the outer case 5 and has the first terminal. The plate 3 is led out through the first opening 52 and the second terminal plate 4 is led out through the second opening 53 in opposite directions.

As described above, the inner case 1 has an opening on both sides facing the internal space 12 and the frame 11 is
2, the piezoelectric vibrator 2 has electrodes 21 and 22 on opposing surfaces and is housed in the internal space 12. Each of the first terminal plate 3 and the second terminal plate 4 is disposed on both sides of the piezoelectric vibrator 2, and the electrodes 21, 22
Is pressed against. With this structure, a piezoelectric component can be obtained in which the piezoelectric vibrator 2 and the first and second terminal plates 3 and 4 are integrated via the inner case 1 and are electrically connected.

The outer case 5 has a storage space 51, and a first opening 52 connected to the storage space 51 and a second opening 52 on both sides.
The opening 53 is provided. According to this structure, the inner case
1, piezoelectric vibrator 2 and first and second terminal plates 3, 4
Through the opening of the outer case 5, the assembly of the above is assembled into a piezoelectric component.

The first terminal plate 3 extends through the first opening 52 and the second terminal plate 4 extends through the second opening 53 in opposite directions. According to this structure, both ends of the end of the first terminal plate 3 and the end of the second terminal plate 4, which are led out in opposite directions, become the opposite terminals of the piezoelectric component. Exerts a self-alignment effect. For example, as shown in FIG.
When the piezoelectric vibrating parts are soldered to the reflow soldering conductor patterns 61 and 62 formed on the circuit board 6, even if the piezoelectric parts are incorrectly arranged as indicated by dotted lines,
When the solder adhered to the surfaces of the conductor patterns 61 and 62 reflows, a self-alignment action is obtained in which the piezoelectric component automatically rotates in the direction of arrow a due to the surface tension of the molten solder. The piezoelectric components are arranged at appropriate positions indicated by solid lines.

In the inner case 1, the frame portion 11 has a substantially rectangular shape and has four inner wall surfaces 12 defining an inner space 12.
1 to 124, and have projections 131 to 134 on the inner wall surfaces 121 to 124, respectively.

The piezoelectric vibrator 2 has a substantially square shape, preferably a square shape. However, for frequency adjustment and spurious adjustment, the corner portion is subjected to R-surface processing or C-surface processing without substantially changing the overall shape, or the intersection angle of the four sides is increased from 90 degrees. It may be slightly changed, or the length ratio of the four sides may be slightly changed, or a notch may be provided at a substantially central portion of two opposing sides. The piezoelectric vibrator 2 has electrodes 21 and 22 on both opposing main surfaces of the element body 20.

As shown in FIG. 5, the piezoelectric vibrator 2 has protrusions 131 at or near the nodes formed on each of the four sides.
Are stored in the internal space 12 of the frame portion 11 in a relationship corresponding to. The piezoelectric vibrator 2 is a plate-like element using a plane spreading vibration mode. Specifically, it has a structure in which electrodes 21 and 22 are provided on both sides in the thickness direction of a body 20 made of a plate-shaped piezoelectric ceramic, and the body 20 has electrodes 21-22 on both sides.
Polarized by applying an electric field between them. Surface spreading vibration mode
In the case of a node, a node is generated at the center of the plane of the element body 20 and almost at the middle of each of the four sides.

The first terminal plate 3 has a projection 310 for point contact substantially at the center of the electrode contact portion 31 and has four notches 311 to 314 around the electrode contact portion 31. The terminal portion 32 is continuously drawn out from the electrode contact portion 31 and has a bent piece 321. Missing part 3
11 to 314 fit with the projections 131 to 134.

The second terminal plate 4 includes an electrode contact portion 41 and a terminal portion 42. The electrode contact portion 41 has four missing portions 411 to 414 around the periphery. The terminal part 42 is the electrode contact part 4
1 has a bent piece 421 that is continuously pulled out. In the electrode contact portion 41, the missing portions 411 to 414 have the protrusion 1
Mates with 31-134. The electrode contact portion 41 of the second terminal plate 4 is curved to have a spring property, and has a projection 410 for point contact at the center thereof. Since the piezoelectric vibrator 2 operates in the plane spreading vibration mode, a node is generated at the center thereof. Projections 310, 410 provided at the center of the electrode contact portions 31, 41 of the first and second terminal plates 3, 4.
Are in pressure contact with the electrodes 21 and 22 at a node generated at the center of the piezoelectric vibrator 2.

The first and second terminal plates 3 and 4 are formed by pressing or the like using a copper plate or a phosphor bronze plate or the like. The thickness of the plate used is, for example, about 0.1 mm.

As shown in the embodiment, the frame 11 of the inner case 1 has four inner wall surfaces 121 to 41 defining an inner space 12.
124 and projections 131 to 134 on the inner wall surfaces 121 to 124, respectively. In the piezoelectric vibrator 2, the nodes generated on each of four sides formed by two sets of opposing sides or the vicinity thereof correspond to the projections 131 to 134 provided on the inner wall surfaces 121 to 124 of the inner case 1. In the internal space 12 of the frame portion 11 (see FIG. 5).
According to this structure, the piezoelectric vibrator 2 can be incorporated in the case without causing a characteristic change due to the contact with the inner case 1, and the vibration of the piezoelectric vibrator 2 can be suppressed and the vibration obstacle can be reduced. Will not occur.

Further, the piezoelectric vibrator 2 has a central portion O1 by projections 131 to 134 provided on the inner case 1.
(See FIG. 5) is positioned so as to be located substantially at the center of the inner case 1.

The electrode contact portions 31 and 41 of the first and second terminal plates 3 and 4 have four missing portions 311 to 314, 4
11 to 414. In the electrode contact portions 31 and 41, the missing portions 311 to 314 and 411 to 414 are fitted with the projections 131 to 134 provided on the inner case 1. For this reason, the first and second terminal plates 3 and 4 are provided inside the inner case 1 with the four missing portions 311 to 314 and 411 to 414.
And the projections 131 to 134 are fitted so that the centers of the first and second terminal plates 3 and 4 are located substantially at the center of the inner case 1. Positioning of the first and second terminal plates 3 and 4 and the above-described piezoelectric vibrator 2
Of the first and second terminal plates 3, 4
At the center of the piezoelectric vibrator 2 and the electrode 2 of the piezoelectric vibrator 2
1, 22 can be brought into pressure contact. Thereby, a stable oscillation frequency, a resonance resistance, and the like can be secured.

Further, the first and second terminal plates 3 and 4 are
Projection 31 provided at the center of electrode contact portions 31 and 41
Reference numerals 0 and 410 are in pressure contact with the electrodes 21 and 22 at a node generated at the center of the piezoelectric vibrator 2. As a result, the piezoelectric vibrator 2 is sandwiched between the first and second terminal plates 3 and 4 from both main surfaces, and is subjected to spring pressure, and a highly reliable piezoelectric component having stable electrode contact characteristics. Is obtained.

The first opening 52 of the outer case 5 is an opening corresponding to the thickness of the first terminal plate 3. Therefore, the first
The terminal plate 3 is guided to the outside of the outer case 5 with its periphery supported by the first opening 52, so that the support stability of the first terminal plate 3 is enhanced. Furthermore, with this structure,
It is possible to prevent the sealing material from entering the storage space 51 from the first opening 52.

The second opening 53 is an opening corresponding to the thickness of the assembly of the inner case 1, the piezoelectric vibrator 2, and the second terminal plate 4. Therefore, the assembly of the inner case 1, the piezoelectric vibrator 2, and the second terminal plate 4 can be housed in the housing of the outer case 5 through the second opening 53. Therefore, the assembling is facilitated.

The first opening 52 is sealed with a resin 71, and the second opening 53 is sealed with a resin 72. According to this structure, since the housing portion of the outer case 5 is shielded by the resin 71, 72, the reliability and durability of the piezoelectric vibrator 2 housed in the housing member are improved.

The first terminal plate 3 and the second terminal plate 4 are
It has terminal portions 32 and 42, and the terminal portions 32 and 42
It is bent along the outer surface of the outer case 5. According to this structure, the bending of the terminal portions 32 and 42 of the first terminal plate 3 and the second terminal plate 4, a positional change, and the like are avoided, and a piezoelectric component suitable for SMD having a predetermined dimension can be obtained.

In the embodiment, the terminal portions 32 and 42 have their tips fitted into the concave portions provided at the bottom of the outer case 5. With such a structure, a piezoelectric component suitable for SMD with a minimum mounting area can be obtained.

FIG. 6 is an exploded perspective view showing another embodiment of the piezoelectric component according to the present invention, and FIG. 7 shows an assembled state of the inner case, the piezoelectric vibrator and the terminal plate in the piezoelectric component shown in FIG. It is a perspective view. The same components as those shown in FIGS. 1 to 5 are denoted by the same reference numerals, and description thereof will be omitted. FIG.
A feature of the embodiment shown in FIG. 7 is that the inner case 1 has cutouts 135 and 136 on the upper end surface on the inner wall surface 122 side and cutout portions 137 and 138 on the upper end surface on the inner wall surface 124 side. Have
The first terminal plate 3 has the cutouts 135, 136, 137, 13
8 and the inner case 1 and the first terminal plate 3 form a flat surface without a step. In this embodiment, the same operation and effect as those of the embodiment shown in FIGS. Further, when the above-described structure is adopted for the inner case 1, when the first opening 52 and the second opening 53 of the outer case 5 are sealed with the resin 71, 72, the resin 71, 72 is sealed. The advantage is obtained that the intrusion into the inner case 1 can be reliably prevented.

FIG. 8 is a partial front sectional view showing still another embodiment of the piezoelectric component according to the present invention. The same components as those shown in FIGS. 1 to 7 are denoted by the same reference numerals, and description thereof will be omitted. A feature of the embodiment shown in FIG. 8 is that the terminal portions 32 and 42 of the first terminal plate 3 and the second terminal plate 4 are provided.
Is bent along the outer surface of the outer case 5 and the tip thereof is bent away from the outer case 5. In the embodiment shown in FIG.
The shapes of the case 1 and the outer case 5 are not specifically shown, but various shapes can be used. Also in the case of this embodiment, the embodiment shown in FIGS.
The same operation and effect as those of the embodiment shown in FIGS.

Next, FIGS. 9 to 20 are views for explaining a method of manufacturing a piezoelectric component according to the present invention. Hereinafter, a method of manufacturing the piezoelectric component illustrated in FIGS. 1 to 5 will be described with reference to FIGS. 8 and FIG.
The following manufacturing method is also applied to the piezoelectric component shown in FIG.

First, in the first step, FIGS.
As shown in (1), the first terminal plate 3 is passed through the first opening 52 of the outer case 5. The first terminal plate 3 is a first frame.
Are arranged on the system 30 with an interval D11 (see FIG. 9). The outer case 5 has a storage space 51, and has a first opening 52 and a second opening 53 connected to the storage space 51 on both sides (see FIG. 11). The first terminal plate 3 has an outer casing.
1 through the first opening 52 (see FIG. 11). Here, the perforation holes 301 and 302 correspond to the first frame.
The first terminal plate 3 is arranged on the production line 30 at an interval D12, and is used for moving the first terminal plate 3 at regular intervals in the production line.

In the second step, the inner case 1 is arranged on the second terminal plate 4, as shown in FIG. Second
Are disposed on the second frame 40 with a space D21 therebetween. The inner case 1 has an internal space 12 and a frame portion 11, and the internal space 12 is opened on both opposite sides, and the frame portion 11 defines the internal space 12. Sprocket 4
01 and 402 are arranged on the second frame 40 with a space D22 therebetween.
Is used to move at regular intervals. However, there is no chronological relationship between the first step and the second step.

In the third step, as shown in FIG. 13, the piezoelectric vibrator 2 is housed in the inner case 1 arranged on the second terminal plate 4. The piezoelectric vibrator 2 has electrodes 21 and 22 on opposing surfaces, and the electrode 21 contacts the second terminal plate 4 (see FIG. 2).

In the fourth step, as shown in FIG. 14, the assembly of the first terminal plate 3 and the outer case 5 obtained in the first step and the second and third steps are performed. The obtained second terminal plate 4, the inner case 1, and the assembly of the piezoelectric vibrator 2 are opposed to each other.

Next, as shown in FIG. 15, the first terminal plate 3 is positioned above the other of the electrodes of the piezoelectric vibrator 2, and
The outer case 5 is slid in the direction of arrow b while applying a compressive force to the terminal plate 3 and the second terminal plate 4,
The second terminal plate 4, the inner case 1, the piezoelectric vibrator 2 and the second
Terminal board 4 is housed in the inner space of the outer case 5.

In the fifth step, after the fourth step, as shown in FIG. 16, the second terminal plate 4 is cut along the line cc and separated from the second frame 40. .

In the sixth step, after the fifth step, as shown in FIG.
Fill. As shown in FIG. 18, the second opening 53 is filled with a resin 72. In the embodiment, after the first opening 52 is sealed, the second opening 53 is sealed. However, after the second opening 53 is sealed, the first opening 52 is sealed.
May be sealed.

In the seventh step, as shown in FIG. 19, the first terminal plate 3 is cut along the line dd,
From the frame 30 of FIG. Next, as shown in FIG. 20, the outer case 5 is bent along the outer surface. As a result, a completed piezoelectric component is obtained.

[0068]

As described above, according to the present invention, the following effects can be obtained. (A) It is possible to provide an SMD piezoelectric component that can exhibit a self-alignment effect in reflow soldering. (B) It is possible to provide a piezoelectric component that does not suppress vibration of the piezoelectric vibrator and does not cause vibration disturbance. (C) It is possible to provide a piezoelectric component that can secure a stable oscillation frequency, a resonance resistance, and the like.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a piezoelectric component according to the present invention.

FIG. 2 is a partial front sectional view of a piezoelectric component according to the present invention.

FIG. 3 is a perspective view showing an assembled state of an inner case, a piezoelectric vibrator, and a terminal plate in the piezoelectric component according to the present invention shown in FIGS. 1 and 2;

4 is a plan view illustrating a self-alignment operation of the piezoelectric component according to the present invention shown in FIGS. 1 to 3. FIG.

FIG. 5 is a view showing a relationship between an inner case and a piezoelectric vibrator in the piezoelectric component according to the present invention.

FIG. 6 is an exploded perspective view showing another embodiment of the piezoelectric component according to the present invention.

FIG. 7 is a perspective view showing an assembled state of an inner case, a piezoelectric vibrator and a terminal plate in the piezoelectric component shown in FIG. 6;

FIG. 8 is a front partial sectional view showing still another embodiment of the piezoelectric component according to the present invention.

FIG. 9 is a view illustrating a tree used for manufacturing a piezoelectric component according to the present invention.
It is a perspective view of a do frame.

FIG. 10 is a perspective view showing a step of manufacturing a piezoelectric component according to the present invention.

FIG. 11 is a sectional view taken along the line 11-11 in FIG. 10;

FIG. 12 is a perspective view of a lead frame used for manufacturing a piezoelectric component according to the present invention.

FIG. 13 is a perspective view showing a step of manufacturing a piezoelectric component according to the present invention.

FIG. 14 is a perspective view showing a step of manufacturing a piezoelectric component according to the present invention.

FIG. 15 is a sectional view showing a step of manufacturing the piezoelectric component according to the present invention.

FIG. 16 is a cross-sectional view showing a step of manufacturing the piezoelectric component according to the present invention.

FIG. 17 is a cross-sectional view showing a step of manufacturing the piezoelectric component according to the present invention.

FIG. 18 is a sectional view showing a step of manufacturing the piezoelectric component according to the present invention.

FIG. 19 is a cross-sectional view illustrating a step of manufacturing the piezoelectric component according to the present invention.

FIG. 20 is a sectional view showing a step of manufacturing the piezoelectric component according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inner case 131-134 Projection 141-148 Depression 2 Piezoelectric vibrator 3, 4 Terminal board 31, 41 Electrode contact part 32, 42 Terminal part 321, 421 Notch part 322, 422 Folding piece 5 Outer case

Claims (11)

[Claims] 1. A piezoelectric component including an inner case, a piezoelectric vibrator, a first terminal plate, a second terminal plate, and an outer case, wherein the inner case is: An internal space, and a frame portion, wherein the internal space is opened on both opposite sides, and the frame portion has a substantially rectangular shape, defines the internal space, and defines the internal space. It has four inner walls,
Each of the inner wall surfaces has a projection, and each of the piezoelectric vibrators has electrodes on opposing surfaces, has a substantially rectangular shape, and has a node on each of four sides or its vicinity. The first terminal plate and the second terminal plate are disposed on the both sides of the piezoelectric vibrator, respectively, and are housed in the internal space of the frame portion in a relationship corresponding to The electrode contact portion has a plurality of notches in its periphery, each of the notches is fitted with each of the protrusions, the outer case has a storage space, A first opening portion and a second opening portion connected to the storage space on a surface, and assembling the inner case, the piezoelectric vibrator, the first terminal plate, and the second terminal plate; The body is housed in the housing space of the outer case, and the first terminal And the second terminal plate is the first opening and the second piezoelectric component are led in opposite directions through the opening in the. 2. The piezoelectric component according to claim 1, wherein the first opening is an opening corresponding to a thickness of the first terminal plate, and wherein the second opening is An opening corresponding to a thickness of an assembly of the inner case, the piezoelectric vibrator, and the second terminal plate, wherein the first terminal plate penetrates the first opening, The piezoelectric component is led out of the outer case, and the second terminal plate is led out of the second case through the second opening to the outside of the outer case. 3. The piezoelectric component according to claim 1, wherein the first opening and the second opening are sealed with a resin. 4. The piezoelectric component according to claim 1, wherein the first terminal plate and the second terminal plate have a terminal portion, and the terminal portion is provided with the outer casing. Piezoelectric components bent along the outer surface of the 5. The piezoelectric component according to claim 4, wherein the terminal has a tip fitted into a concave portion provided at a bottom of the outer case. 6. The piezoelectric component according to claim 4, wherein the terminal portion is bent in a direction in which a tip portion is away from the outer case. 7. The piezoelectric component according to claim 1, wherein the first terminal plate has a protrusion that contacts the electrode of the piezoelectric element, and the first terminal plate has a flat shape except for the protrusion. The second terminal plate is a piezoelectric component having a contact projection for contacting the electrode of the piezoelectric vibrator and a dome-shaped portion for obtaining a spring property. 8. A method for manufacturing a piezoelectric component, the method including a plurality of steps, the first step being a step of penetrating a first terminal plate through a first opening of an outer case. The first terminal plate is disposed at a distance from the first frame, and the outer case has a storage space, and a first opening connected to the storage space on both sides. And a second opening, the first terminal plate penetrating through the first opening of the outer case, and the second step is a step of A step of arranging an inner case in the second terminal board, wherein the second terminal board is arranged at an interval in a second frame, and the inner case is
An internal space and a frame portion, wherein the internal space is opened on opposite sides, the frame portion defines the internal space, and a third step is arranged on the second terminal board. Storing a piezoelectric vibrator in the inner case,
The piezoelectric vibrator has electrodes on opposite surfaces, one of the electrodes is in contact with the second terminal plate, and the fourth step is the first terminal obtained in the first step. Opposing an assembly of a plate and the outer case to an assembly of the second terminal plate, the inner case and the piezoelectric vibrator obtained through the second and third steps. And positioning the first terminal plate above the other of the electrodes of the piezoelectric vibrator and applying a compressive force to the first terminal plate and the second terminal plate, A method of manufacturing a piezoelectric component in which the second terminal plate, the inner case, the piezoelectric vibrator, and the second terminal plate are housed in the inner space of the outer case by sliding the case. 9. The method according to claim 8, wherein in the fifth step, during or after the fourth step, the second terminal plate is separated from the second frame. Step is the method of manufacturing piezoelectric components. 10. The manufacturing method according to claim 8, wherein in the sixth step, after the fifth step, the first opening and the second opening are filled with a resin. Step is the method of manufacturing piezoelectric components. 11. The manufacturing method according to claim 8, wherein in the seventh step, after the sixth step, the first terminal plate is separated from the first frame. A method of manufacturing a piezoelectric component, comprising the step of bending along the outer surface of the outer case.