JPH06334473A - Piezoelectric resonance component - Google Patents

Abstract

PURPOSE:To obtain the piezoelectric resonance component able to prevent a deflection of a cover even when a thin profile is attained through the use of a thin cover. CONSTITUTION:A case 1 has plural internal spaces 11, 12 and a partition section 13. The internal spaces 11, 12 are separated by the partition section 13 and an opening is provided to a side opposite to a bottom 14. One end face of the partition section 13 is placed at the opening side. Piezoelectric resonators 21-26 and terminals 31-37 are overlapped with each other to form plural assemblies A, B. The assemblies A, B are arranged in the internal spaces 11, 12. A cover 4 is arranged to choke the opening and the surrounding is coupled with an inner wall of the internal spaces 11, 12 and a middle part is adhered to one end face 131 of the partition section 13 by an adhesives 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piezoelectric resonance component used for a ladder type ceramic filter or the like.

[0002]

2. Description of the Related Art As this type of piezoelectric resonance component, a ladder type ceramic filter disclosed in Japanese Utility Model Laid-Open No. 4-27625 is known. The piezoelectric resonance component described in this publicly known document has a plurality of piezoelectric resonance plates and a terminal plate arranged in a superposed manner in a case whose interior is divided into a plurality of regions by a partition plate having an opening in the vertical direction, and at the same time in the region. The arranged terminal board is connected through the opening of the partition board. The opening of the case is closed by a lid.

[0003]

In this type of piezoelectric resonance component, one means for meeting the demand for miniaturization is as follows.
It is effective to reduce the thickness of the lid that closes the opening of the case. However, since the plurality of piezoelectric resonance plates and the terminal plate are superposed in the case, the elastic force generated by the superposition of the piezoelectric resonance plate and the terminal plate is applied to the lid as an internal pressure. This internal pressure causes the lid to flex outwardly. To avoid this flexing, the lid must be thick. Therefore, it is difficult to make the lid thinner than a certain thickness. Moreover, since the inside of the case is divided into a plurality of regions by the partition plate and the plurality of piezoelectric resonance plates and the terminal plate are superposedly arranged in each region, internal pressure for bending the lid is generated on both sides of the partition plate. . The above-mentioned known document does not disclose means for solving such a problem.

Therefore, an object of the present invention is to increase the number of piezoelectric resonators housed in a case and obtain a piezoelectric resonant component suitable for forming a ladder circuit having a large number of stages.

Another object of the present invention is to provide a piezoelectric resonance component in which an assembly of a piezoelectric resonator and a terminal can be easily incorporated in a case.

Another object of the present invention is to provide a piezoelectric resonance component capable of preventing mutual interference by partitioning an assembly of a piezoelectric resonator and a terminal arranged in each internal space by a partition. is there.

Yet another object of the present invention is to provide a piezoelectric resonance component capable of holding an assembly of a piezoelectric resonator and a terminal arranged in each internal space between a bottom portion and a lid of a case. .

Still another object of the present invention is to provide a piezoelectric resonance component capable of preventing the lid from bending even when the thickness is reduced by using a thin lid.

[0009]

To solve the above problems, the present invention provides a case, a lid, a plurality of piezoelectric resonators,
A piezoelectric resonance component including a plurality of terminals, wherein the case has a plurality of internal spaces and a partition, and each of the internal spaces is partitioned by the partition and faces the bottom. Has an opening on the side, one end surface of the partition portion is located on the opening side, the other end side is located on the bottom portion side, the piezoelectric resonator and the terminal are overlapped with each other and a plurality of An assembly, each of the assemblies is disposed in each of the interior spaces, and the lid is
The case is arranged so as to close the opening, and the periphery is joined to the inner wall surface or the upper end surface of the internal space,
The intermediate portion is joined to the one end surface of the partition portion by adhesion, welding, or the like.

[0010]

The case has a plurality of internal spaces, and the piezoelectric resonator and the terminals form an assembly in which they are stacked on top of each other, and each of the assemblies is arranged in each of the internal spaces. Increase the number of piezoelectric resonators stored,
A piezoelectric resonance component suitable for forming a ladder circuit having a large number of stages can be obtained.

Since each of the internal spaces of the case has an opening on the side facing the bottom, the assembly of the piezoelectric resonator and the terminal is inserted into the internal space through the opening, and the assembly is placed at the bottom. Can receive. Therefore, the work of assembling the assembly of the piezoelectric resonator and the terminal into the case is easy.

Since the case has a partition and each of the internal spaces is partitioned by the partition,
The assembly of the piezoelectric resonator and the terminal arranged in each inner space can be partitioned by the partition to prevent mutual interference.

Since the lid is arranged so as to close the opening of the case, the assembly of the piezoelectric resonator and the terminal arranged in each internal space can be held between the bottom of the case and the lid. it can.

Since the periphery of the lid is connected to the inner wall surface or the upper end surface of the internal space, and the middle portion is joined to one end surface of the partition portion by adhesion, welding, etc., the piezoelectric elements arranged on both sides of the partition portion. The elasticity generated in the resonator and terminal assembly and the resulting internal pressure are received not only by the connection between the periphery of the lid and the inner wall surface, but also by the bonded portion between the lid and the partition.
The same applies to the external pressure applied to the lid from the outside. Therefore, the mechanical strength of the lid increases, and the lid is less likely to bend. Therefore, the lid can be made of a thin plate material and can be made thin.

[0015]

1 is a partial sectional view of a piezoelectric resonance component according to the present invention, and FIG. 2 is a plan view showing the piezoelectric resonance component shown in FIG. 1 with a lid removed. In the figure, 1 is a case 21-
Reference numeral 26 is a piezoelectric resonator, 31 to 37 are terminals, and 4 is a lid.

The case 1 has a plurality of internal spaces 11, 12
And a partition part 13. Each of the internal spaces 11 and 12 is partitioned from each other by the partition 13 and has an opening on the side facing the bottom 14. One end surface 131 of the partition portion 13 is located on the opening side, and the other end 132 side is the bottom portion 1
It is located on the 4th side. A notch 13 is formed in the middle of the partition 13.
3 is provided. The partition portion 13 may be formed integrally with the case 1, or may be formed by attaching a member that is a component different from the case 1 inside the case 1.

Piezoelectric resonators 21-26 and terminals 31-37
Are stacked on each other to form a plurality of assemblies A and B. The assemblies A and B are arranged in the internal spaces 11 and 12, respectively. The assembly A is composed of a terminal 31, a piezoelectric resonator 21, a terminal 32, a piezoelectric resonator 22, a terminal 33, a piezoelectric resonator 23 and a terminal 34, which are sequentially laminated in this order. The assembly B includes a terminal 35, a piezoelectric resonator 24,
The terminal 31, the piezoelectric resonator 25, the terminal 36, the terminal 32, the piezoelectric resonator 26, and the terminal 37 are sequentially laminated in this order. Between the piezoelectric resonator 24 and the piezoelectric resonator 25, a terminal 31 for receiving the piezoelectric resonator 21 forming the assembly A is arranged in an extended manner. The connection part 310 of the terminal 31 passes through the notch 133 provided in the partition part 13 and is guided to the internal space 12. Piezoelectric resonator 26 and terminal 36
A terminal 32 disposed between the piezoelectric resonator 21 and the piezoelectric resonator 22 forming the assembly A is extended between and. The connecting portion 320 of the terminal 32 is guided to the internal space 12 through the notch 133 provided in the partition portion 13. The terminal 32 is electrically insulated from the terminal 36 that contacts the piezoelectric resonator 25. Terminals 33, 34, 35, 36 and 37
Are lead portions 331, 341 guided to the outside of the case 1,
It has 351, 361 and 371 respectively.

FIG. 3 is an electrical symbol diagram of the piezoelectric resonance component shown in the embodiment. The piezoelectric resonators 24, 21 and 22 are series resonators, the piezoelectric resonators 25, 26 and 23 are parallel resonators, the lead portion 351 of the terminal 35 is an input terminal, and the terminal 3
A ladder circuit is obtained in which the lead portions 361, 371, 341 of 6, 37, 34 are ground terminals and the lead portion 331 of the terminal 33 is an output terminal.

The lid 4 is arranged so as to close the opening of the case 1, the periphery thereof is joined to the inner wall surfaces of the internal spaces 11 and 12, and the middle portion is adhered to the one end surface 131 of the partition 13 by the adhesive 5. ing. The periphery of the lid 4 and the inner wall surface of the case 1 can be joined by an adhesive or a mechanical joining means.

As described above, the case 1 has a plurality of internal spaces 11 and 12, and the piezoelectric resonators 21 to 26 and the terminals 31 to 37 form assemblies A and B that are stacked on each other, and are assembled. Since the solids A and B are respectively arranged in the internal spaces A and B, it is possible to increase the number of the piezoelectric resonators 21 to 26 housed in the case 1 and configure a ladder circuit having a large number of stages. A suitable piezoelectric resonance component can be obtained.

Since each of the internal spaces 11 and 12 of the case 1 has an opening on the side facing the bottom 14, the assemblies A and B of the piezoelectric resonators 21 to 26 and the terminals 31 to 37 are formed.
Can be inserted into the internal spaces 11, 12 through the openings and the assemblies A, B can be received at the bottom 14. Therefore, it is easy to assemble the assemblies A and B of the piezoelectric resonators 21 to 26 and the terminals 31 to 37 into the case 1.

Since the case 1 has a partition 13 and the internal spaces 11 and 12 are partitioned from each other by the partition 13, the piezoelectric resonators arranged inside the internal spaces 11 and 12, respectively. 21-26 and terminals 31-37
The assemblies A and B can be partitioned by the partition 13 to prevent mutual interference.

Since the lid 4 is arranged so as to close the opening of the case 1, the assembly A of the piezoelectric resonators 21 to 26 and the terminals 31 to 37 arranged inside the inner spaces 11 and 12, respectively. B can be held between the bottom 14 of the case 1 and the lid 4.

A peripheral portion of the lid 4 is joined to the inner wall surfaces of the internal spaces 11 and 12, and an intermediate portion is attached to the one end surface of the partition portion 13 with an adhesive 5.
Since they are adhered by means of the elastic force generated in the assemblies A and B of the piezoelectric resonators 21 to 26 and the terminals 31 to 37 arranged on both sides of the partition portion 13 and the internal pressure resulting from the elasticity, Can be received not only by the connection between the inner wall surface and the inner wall surface, but also by the bonded portion between the lid 4 and the partition portion 13. The same applies to the external pressure applied to the lid 4 from the outside. Therefore, the mechanical strength of the lid 4 increases, and the lid 4 is less likely to bend. Therefore, the lid 4 is made of a plate material such as thin plastic,
The thickness can be reduced.

Each of the piezoelectric resonators 21 to 26 is an element utilizing the surface expansion vibration mode. More specifically, electrodes are provided on both surfaces of the piezoelectric ceramic body, and are polarized so that an electrostrictive phenomenon occurs in a diagonal direction when an electric field is applied between the electrodes. In the face-spreading vibration mode, a node is generated at the center of the plane of the piezoelectric ceramic body.

Each of the terminals 31 to 37 has a piezoelectric resonator 21 to a node formed on the surface of the piezoelectric resonator 21 to 26.
The piezoelectric resonators 21 to 2 are in contact with 26
It is arranged away from the surface of No. 6. Terminals 31 to 3
7 is made of, for example, a copper plate or a phosphor bronze plate having a plate thickness of about 0.1 mm. The terminals 31 to 37 are protrusions P
It has each. The protrusion P is the piezoelectric resonator 22, 23.
Constitutes a contact portion for a node occurring on the surface of.

Piezoelectric resonators 21-26 and terminals 31-37
As described above, they are arranged in the internal space 11 such that they are stacked to form a ladder circuit, and at least the periphery of the piezoelectric resonators 21 to 26 is spaced from the inner wall surface of the internal space 11. ing.

As shown in the embodiment, the piezoelectric resonators 21-
26 and terminals 31 to 37 are at least piezoelectric resonators 21 to
The piezoelectric resonators 21 to 26 and the terminals 31 to 37 are brought into contact with the case 1 because the periphery of 26 is arranged in the internal spaces 11 and 12 so as to be spaced from the inner wall surfaces of the internal spaces 11 and 12. Case 1 without causing characteristic fluctuation due to
A ladder-type piezoelectric resonance component built in is obtained.

Each of the piezoelectric resonators 21 to 26 is an element utilizing a surface expansion vibration mode, and has terminals 31 to 37.
Of the piezoelectric resonators 21 to 26 are in contact with each other at nodes generated on the surfaces of the piezoelectric resonators 21 to 26, and portions other than the contact point P are piezoelectric resonators 21 to 2
6, the influence of the terminals 31 to 37 on the surface expansion vibration modes of the piezoelectric resonators 21 to 26 can be minimized.

As the piezoelectric resonators 21 to 26, ordinary type ones can be used. In addition, as shown in FIG. 4, the electrodes 210 attached to the piezoelectric ceramic body 200 are made of Cu-Ni alloy, Ni-Cr. It is also effective to use an alloy or at least one of Cr-Si alloys. The electrode 210 made of these alloys has excellent oxidation resistance, sulfidation resistance and corrosion resistance, and there is no room for silver migration to occur. Therefore, it is possible to obtain a highly reliable piezoelectric resonance component in which poor contact does not easily occur between the electrodes 210 of the piezoelectric resonators 21 to 26 and the terminals 31 to 37.

Further, when the electrode 210 made of at least one of Cu-Ni alloy, Ni-Cr alloy and Cr-Si alloy is used as a filter, the electrode 210 has an appropriate electric resistance value and thus is effectively piezoelectric. Q of oscillator
Since the value is reduced, the group delay characteristic can be improved. Therefore, the group delay characteristic can be improved without using a resistor.

FIG. 5 is a partial sectional view of the piezoelectric resonance component according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 3 denote the same components. Piezoelectric resonator 21 to
Each of the 26 has conductive protrusions 61-72 on the nodes that occur on the surface. The conductive protrusions 61 to 72 are
At least the surface is kept at the same potential as the electrodes provided on the surface of the piezoelectric ceramic body. The conductive protrusions 61 to 72 shown are conductive resins attached to the surfaces of the piezoelectric resonators 21 to 26,
For example, it is made of an epoxy-based conductive resin, and those obtained by applying and curing these conductive resins are generally used.

Each of the terminals 31 to 37 is formed of a flat plate, is in contact with the conductive protrusions 61 to 72, and is arranged so that the portions other than the contact points are separated from the surfaces of the piezoelectric resonators 21 to 26.

As described above, each of the terminals 31 to 37 has a conductive protrusion 6 provided on each of the piezoelectric resonators 21 to 26.
Since it is in contact with 1 to 72, it is not necessary to provide protrusions on the terminals 31 to 37. Therefore, the structure of the terminals 31 to 37 is simplified, the processing and assembly are facilitated, and the cost is reduced.

Since the terminals 31 to 37 are flat plates, their thickness is minimized. Moreover, in the case of the embodiment, the conductive protrusion 61 is formed.
Since the elements 72 to 72 are formed of the conductive resin, they can be made thinner than the protrusions provided on the conventional terminals.
Therefore, it is easy to reduce the thickness and size. Further, the elasticity of the conductive resin can be used to generate a required spring pressure between the piezoelectric resonators 21 to 26 and the terminals 31 to 37.

FIG. 6 is a partial sectional front view showing another embodiment of the piezoelectric resonant component according to the present invention. Piezoelectric resonator 21-2
6, the conductive protrusions 61 to 72 are formed by partially protruding the surfaces of the piezoelectric resonators 21 to 26. Therefore, it is not necessary to provide protrusions on the terminals 31 to 37. Therefore, the structure of the terminals 31 to 37 is simplified, the processing and assembly are facilitated, and the cost is reduced. Moreover, since the terminals 31 to 37 are flat plates, the thickness is minimized. Moreover, the conductive protrusions 61 to 72 are formed by the piezoelectric resonator 21.
~ 26 formed by itself. For this reason, the whole is thinner than the protrusion provided on the conventional terminal.

FIG. 7 is an enlarged sectional view showing a contact structure between a piezoelectric resonator and a terminal which can be applied to the piezoelectric resonance component shown in FIG. The terminals 31 to 37 are conductive protrusions 61 to 7
The concave portion 8 that receives the conductive protrusions 61 to 72 is provided at the portion that contacts the second portion.

With such a structure, the piezoelectric resonator 21
It is possible to prevent positional deviation between ~ 26 and terminals 31-37. Therefore, it is possible to prevent fluctuations in resonance impedance and generation of unnecessary vibration modes, and obtain desired characteristics.
Further, it is possible to surely prevent the positional displacement and the incorrect arrangement of the piezoelectric resonators 21 to 26 and the terminals 31 to 37 due to the vibration applied from the outside or the drop impact.

FIG. 8 is a partial sectional view showing still another embodiment of the piezoelectric resonance component according to the present invention. Conductive protrusions 61 to
72 is formed by gradually increasing the thickness of the piezoelectric resonators 21 to 26 toward the node in the central portion. Also in the case of this embodiment, the same operational effects as those of the embodiment shown in FIG. 5 are obtained.

FIG. 9 is a partial sectional view showing still another embodiment of the piezoelectric resonance component according to the present invention, and FIG. 10 is a plan view with the lid removed in FIG. In this embodiment, the positioning means 91 to 98 are provided. The positioning means 91 to 98 are elastic resin or expandable elastic resin filled in the positions corresponding to the nodes generated around the piezoelectric resonators 21 to 26. As an example of such a resin, a silicon-based resin can be cited. Since the illustrated piezoelectric resonators 21 to 26 have a rectangular shape, a total of four nodes are generated in the widthwise intermediate portion and the lengthwise intermediate portion of the piezoelectric resonators 21 to 26. The positioning means 91 to 98 are formed by applying an elastic resin or a foamable elastic resin to each of these nodes and curing it. It is desirable that the application width of the elastic resin or the expandable elastic resin be formed as narrow as possible within a range in which necessary mechanical strength can be secured.

Since the positioning means 91 to 98 are made of elastic resin or expandable elastic resin filled in the space, the elastic resin or expandable elastic resin comes into close contact with the piezoelectric resonators 21 to 26 and the terminals 31 to 37. It is possible to reliably prevent misalignment and incorrect placement of the piezoelectric resonators 21 to 26 and the terminals 31 to 37.

Further, the vibration applied from the outside and the drop impact are absorbed by the elasticity of the elastic resin or the foaming elastic resin forming the positioning means 91 to 98, and the piezoelectric resonators 21 to.
It is possible to reliably prevent misalignment of the 26 and the terminals 31 to 37 and improper placement.

The positioning means 91 to 98 are the piezoelectric resonator 2
Since the filling is performed at the positions corresponding to the nodes generated in the peripheral portions of 1 to 26, the vibration disturbance to the piezoelectric resonators 21 to 26 by the positioning means 91 to 98 can be minimized.

The positioning means 91 to 96 are the piezoelectric resonator 2
The protrusions may be provided in the interval along the stacking direction of the terminals 1 to 26 and the terminals 31 to 37. In this case, the protrusion may be formed in the same body as the case 1, or may be a component separate from the case 1 and assembled at a predetermined position. Further, it is desirable that the width be formed as narrow as possible within a range in which necessary mechanical strength can be secured.

With the above structure, the positioning means 91-9
6, it is possible to reliably prevent misalignment and incorrect placement of the piezoelectric resonators 21 to 26 and the terminals 31 to 37. Moreover, since the positioning means 91 to 98 are arranged at the positions corresponding to the nodes generated in the peripheral portions of the piezoelectric resonators 21 to 26, the piezoelectric resonators 21 to 2 by the positioning means 91 to 98 are arranged.
Vibration disturbance to 6 can be minimized.

FIG. 11 is a partial cross-sectional view showing still another embodiment of the piezoelectric resonance component according to the present invention, and FIG. 12 is a plan view with the lid removed in FIG. Of the piezoelectric resonators 21 to 26, the piezoelectric resonators 21 and 22 are smaller in lateral width and vertical width than the piezoelectric resonator 23 by the dimensional differences d1 and d2. The piezo-resonators 24 and 25 are smaller in width and length than the piezo-resonator 26 by the dimensional differences d1 and d2.

The positioning means 91 to 96 are piezoelectric resonators 21.
26 to 26 and terminals 31 to 37, a step portion a having a step corresponding to the width difference or the width difference d1 and d2.
b. Due to the step portions a and b, the piezoelectric resonator 21
The nodes generated on the surface of ˜26 are controlled in the same direction between the piezoelectric resonators. The positioning means 91 to 96 may be formed in the same body as the case 1, or may be a separate component from the case 1 and assembled at a predetermined position. Further, it is desirable that the width be formed as narrow as possible within a range in which necessary mechanical strength can be secured.

Of the plurality of piezoelectric resonators 21 to 26 provided, the piezoelectric resonators 21 and 24 are smaller in lateral width and vertical width than the piezoelectric resonators 22 and 23 by the dimensional differences d1 and d2. Due to the size of the children 21 to 26, high selectivity can be achieved and group delay characteristics can be improved.

The positioning means 91 to 96 are the piezoelectric resonator 2
1 to 26 and terminals 31 to 37 are arranged in the space between the case 1 and the piezoelectric resonators 21 to 26 and the terminals 31 to 37 along the stacking direction of the piezoelectric resonators 21 to 26 and the terminals 31.
Width difference between the width facing and the width facing 37 ~ length d1, d2
Has step portions a and b having a step corresponding to, and the step portions a and b control the nodes generated on the surfaces of the piezoelectric resonators 21 to 26 in a direction in which the piezoelectric resonators coincide with each other. The nodes generated on the surfaces of the piezoelectric resonators 21 to 26 can be surely matched between the piezoelectric resonators 21, 22, 24 and 25 different from each other and the piezoelectric resonators 23 and 26.
Therefore, it is possible to prevent fluctuations in resonance impedance and generation of unnecessary vibration modes, and obtain desired characteristics. Further, the positioning means 91 to 96 prevent the piezoelectric resonators 21 to 26 and the terminals 31 to 37 from being displaced due to vibrations applied from the outside or drop impact, and the piezoelectric resonators 21 to 26 are prevented.
Also, it is possible to surely prevent the positional displacement and the incorrect arrangement of the terminals 31 to 37.

[0050]

As described above, according to the present invention, the following effects can be obtained. (A) It is possible to increase the number of piezoelectric resonators accommodated in the case and provide a piezoelectric resonance component suitable for forming a ladder circuit having a large number of stages. (B) It is possible to provide a piezoelectric resonance component in which the assembly of the piezoelectric resonator and the terminal can be easily incorporated in the case. (C) It is possible to provide a piezoelectric resonance component capable of preventing mutual interference by partitioning the assembly of the piezoelectric resonator and the terminal arranged in each internal space by the partition. (D) It is possible to provide a piezoelectric resonance component capable of preventing the lid from bending even when the thin lid is used to reduce the thickness.

[Brief description of drawings]

FIG. 1 is a partial front sectional view of a piezoelectric resonance component according to the present invention.

FIG. 2 is a plan view showing the piezoelectric resonance component shown in FIG. 1 with a lid removed.

FIG. 3 is an electrical symbol diagram of the piezoelectric resonance component according to the present invention.

FIG. 4 is a partially enlarged cross-sectional view of a piezoelectric resonator that can be used in the piezoelectric resonant component according to the present invention.

FIG. 5 is a front partial cross-sectional view showing another embodiment of the piezoelectric resonance component according to the present invention.

FIG. 6 is a partial front sectional view showing another embodiment of the piezoelectric resonant component according to the present invention.

7 is a cross-sectional view showing an enlarged contact structure between a piezoelectric resonator and a terminal that can be applied to the piezoelectric resonance component shown in FIG.

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

FIG. 9 is a partial front sectional view showing still another embodiment of the piezoelectric resonance component according to the present invention.

FIG. 10 is a plan view showing the piezoelectric resonance component shown in FIG. 9 with a lid removed.

FIG. 11 is a partial front sectional view showing still another embodiment of the piezoelectric resonance component according to the present invention.

FIG. 12 is a plan view showing the piezoelectric resonance component shown in FIG. 11 with a lid removed.

[Explanation of symbols]

 1 Case 11, 12 Internal Space 13 Partition 21-26 Piezoelectric Resonator 31-37 Terminal 4 Lid 5 Adhesive

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Masanobu Sugimoto 1-13-1 Nihonbashi, Chuo-ku, Tokyo TDK Corporation (72) Inventor Satoshi Satoshi 1-13-1 Nihonbashi, Chuo-ku, Tokyo TDC Within the corporation

Claims (2)

[Claims] 1. A case, a lid, a plurality of piezoelectric resonators,
A piezoelectric resonance component including a plurality of terminals, wherein the case has a plurality of internal spaces and a partition part, and each of the internal spaces is partitioned from each other by the partition part and faces the bottom part. Has an opening on the side,
One end surface of the partition portion is located on the opening side and the other end side is located on the bottom portion side, and the piezoelectric resonator and the terminal are stacked on each other to form a plurality of assemblies. Is disposed in each of the internal spaces, the lid is disposed so as to close the opening of the case, the periphery is coupled to the inner wall surface or the upper end surface of the internal space, and the middle portion is the partition. Resonance component bonded to the one end surface of the portion by adhesion, welding, or the like. 2. The piezoelectric resonator is an element that utilizes a surface-spreading vibration mode, and the terminals are in contact with the piezoelectric resonator on a node generated on the surface of the piezoelectric resonator, except for a contact point. A portion is distant from the surface of the piezoelectric resonator, and the assembly of the piezoelectric resonator and the terminal is configured such that at least the periphery of the piezoelectric resonator is spaced from the inner wall surface of the internal space, Resonance component located at.