Patent Publication Number: US-2022230612-A1

Title: Piezoelectric sounding component

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     The present application is a continuation of PCT/JP2020/035548 filed Sep. 18, 2020, which claims priority to Japanese Patent Application No. 2020-016235, filed Feb. 3, 2020, the entire contents of each of which are incorporated herein by reference. 
    
    
     TECHNICAL FIELD 
     The present invention relates to a piezoelectric sounding component. 
     BACKGROUND 
     Currently, piezoelectric sounding components are used as electroacoustic transducers that produce an alarm sound or an operation sound in, for example, household appliances, electronic devices for consumer use and business use such as fire alarm equipment, or automobiles. Among the piezoelectric sounding components, a piezoelectric sounding component that includes a needle-shaped mount terminal called a pin type includes, for example, a piezoelectric diaphragm, a base, a case that is fitted onto an outer side portion of the base and that contains the piezoelectric diaphragm together with the base. The piezoelectric diaphragm, an outer circumferential portion of which is put between the base and the case, is held in an interior space that is formed between a bottom wall portion of the base and a top wall portion of the case. 
     For example, Japanese Unexamined Patent Application Publication No. 7-114383 (hereinafter “Patent Document 1”) discloses a piezoelectric sounding component that includes a piezoelectric diaphragm, a case that includes a case body having an opening and a back cover fixed to the case body such that the back cover closes the opening of the case body and that contains the piezoelectric diaphragm, and a pair of metal terminals that is fixed to the back cover, that is electrically connected to the piezoelectric diaphragm, and that extends from the case to the outside. Moreover, each metal terminal includes a terminal extended portion that extends from the case through the back cover to the outside, a terminal fixing portion that is bent with respect to the terminal extended portion at an end portion of the terminal extended portion facing an inner surface of the back cover and that is disposed along the inner surface of the back cover, and a connecting portion that is bent from an inner end of the terminal fixing portion such that a bent portion has a substantially U-shape when viewed from above and such that a front end is separated from the inner surface of the back cover, and that is in contact with the piezoelectric diaphragm. 
     As for the piezoelectric sounding component of a pin type disclosed in Patent Document 1, the front end of each pin-shaped metal terminal is in contact with an electrode due to the action of appropriate pressure, and electrical connection thereof is achieved. When such a structure is inserted in a mounting substrate, a portion of the metal terminal that is located outside a case is cut, and because of this, stress is applied to a portion of the metal terminal on which a process such as cutting is performed. Under the influence of the stress, the metal terminal rotates (i.e., misalignment), and a portion of the metal terminal that is located inside the case is misaligned in some cases. For this reason, the state of contact between the front end of the metal terminal and the piezoelectric diaphragm changes in some cases. 
     Consequently, there is a possibility that sounding characteristics of the piezoelectric sounding component vary, and that a sound impairment due to the failure of contact between the pin-shaped metal terminal and the piezoelectric diaphragm occurs. 
     SUMMARY OF THE INVENTION 
     Accordingly, it is an object of the present invention to provide a piezoelectric sounding component that can have good reliability. 
     In an exemplary aspect, a piezoelectric sounding component is provided that includes a diaphragm that vibrates when a voltage is applied thereto, a case that includes a case body having an opening and a lid disposed such that the lid closes the opening of the case body and that contains the diaphragm in an interior space that is formed by the case body and the lid, and two pin terminals that are disposed on the lid such that the two pin terminals are in contact with the diaphragm. At least one of the pin terminals includes an extended portion that extends from the interior space to an outside, an extension portion that extends along a main surface of the lid in the interior space, a rising portion that rises from the extension portion, and a contact portion that is disposed at an end of the rising portion and that is in contact with the diaphragm. Moreover, a fixing portion that fixes a position of a first bent portion between the extended portion and the extension portion and a guide portion that is in contact with a second bent portion between the extension portion and the rising portion or a portion near the second bent portion and that guides posture of the pin terminals are on a surface of the lid that faces the interior space. 
     According to the exemplary aspects of the present invention, a piezoelectric sounding component is provided having good reliability. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is an exploded perspective view for describing the structure of a piezoelectric sounding component according to a first exemplary embodiment. 
         FIG. 2  is a sectional view for describing the structure of the piezoelectric sounding component according to the first exemplary embodiment. 
         FIG. 3  is a diagram for describing the structure of a pin terminal according to the first exemplary embodiment. 
         FIG. 4  is a diagram for describing the structure of another pin terminal according to the first exemplary embodiment. 
         FIG. 5  is a diagram for describing a fixation guide structure of a lid according to the first exemplary embodiment. 
         FIG. 6  is a diagram for describing the state of assembly of the pin terminals and the lid according to the first exemplary embodiment. 
         FIG. 7  is a diagram for describing a fixation guide structure of a lid according to a second exemplary embodiment. 
         FIG. 8  is a diagram for describing the state of assembly of pin terminals and the lid according to the second exemplary embodiment. 
         FIG. 9  is a diagram for describing a fixation guide structure of a lid according to a third exemplary embodiment. 
         FIG. 10  is a diagram for describing the state of assembly of pin terminals and the lid according to the third exemplary embodiment. 
         FIG. 11  is a diagram for describing the structure of fixing portions of a lid in a comparative example. 
         FIG. 12  is a diagram for describing the state of assembly of pin terminals and the lid in the comparative example. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
     Exemplary embodiments of the present invention will hereinafter be described. In the following description of the drawings, like or similar components are designated by like or similar reference signs. The drawings are example, the dimensions and shapes of components are schematically illustrated, and it should not be understood that the technical scope of the present invention is limited by the embodiments. 
     First Exemplary Embodiment 
     &lt;Piezoelectric Sounding Component  1 &gt; 
     The structure of a piezoelectric sounding component  1  according to a first embodiment will now be described with reference to  FIG. 1  and  FIG. 2 .  FIG. 1  is an exploded perspective view for describing the structure of the piezoelectric sounding component  1  according to the first embodiment.  FIG. 2  is a sectional view for describing the structure of the piezoelectric sounding component  1  according to the first embodiment. In  FIG. 1  and  FIG. 2 , an exemplary structure is provided for describing at least a part of features of the structure of the piezoelectric sounding component  1  is extracted and illustrated. However, the piezoelectric sounding component  1  is not prevented from including a different structure than that which is illustrated. 
     In general, the piezoelectric sounding component  1  is an example of a sound component of a pin type and includes a diaphragm  2 , a case  6  that contains the diaphragm  2 , and two pin terminals  5  that, in operation, apply a voltage to the diaphragm  2  with the two pin terminals  5  being in contact with the diaphragm  2 . 
     As shown, the case  6  includes a case body  3  and a lid  4 . The lid  4  is mounted on the case body  3  so as to close the opening of the case body  3  and consequently forms the case  6 . The case  6  has an interior space  30  that is formed by surfaces of the case body  3  and the lid  4  that face a portion inside the case  6 . 
     For convenience of description, a state in which the diaphragm  2 , the case body  3 , the lid  4 , and the two pin terminals  5  are assembled into the piezoelectric sounding component  1  is referred to below as the “state of assembly”. In the state of assembly, the plane direction of each structure in the piezoelectric sounding component  1  is referred to as an “XY plane”, and the direction perpendicular to the plane direction of the structure, that is, the direction perpendicular to the XY plane is referred to as a “Z-direction” in some cases. As for the case where the structure of the piezoelectric sounding component  1  or the diaphragm  2  is viewed in the thickness direction of, for example, the piezoelectric sounding component  1  or the diaphragm  2  in a plan view, the shape of, for example, the diaphragm  2  in a plan view is referred to as a “shape in a plan view”. As for the Z-direction in the state of assembly, as illustrated in  FIG. 2 , a direction from the case body  3  toward the lid  4  is referred to as a “first direction”, and a direction from the lid  4  toward a top wall portion  31  of the case body  3  described later is referred to as a “second direction” in some cases. 
     According to the first embodiment, the diaphragm  2 , the case body  3 , and the lid  4  each have a circular shape in a plan view. In the state of assembly, the diaphragm  2 , the case body  3 , and the lid  4  are arranged such that the circle center of each shape in a plan view is substantially aligned along a straight line, i.e., in the Z-direction. 
     According to the first embodiment, the diaphragm  2  is installed (e.g., contained or disposed) in the case body  3 , the lid  4  subsequently closes the opening (a cavity  33  described later) of the case body  3  and fixes the diaphragm  2  together with the case body  3  (a support surface  353  described later) with the diaphragm  2  disposed therebetween. In this way, the diaphragm  2  is contained in the interior space  30  of the case  6 . In the state of assembly, the two pin terminals  5  are disposed on the lid  4 , and front ends that are located in the interior space  30  are in contact with the diaphragm  2 . 
     (Diaphragm  2 ) 
     The diaphragm  2  includes a substrate  10  and a vibration element  20 . The vibration element  20  is stuck on a central portion of a main surface (e.g., a first substrate main surface  11  described later) of the substrate  10  that faces in the first direction by using a conductive adhesive. The substrate  10  and the vibration element  20  are disk-shaped components. The diameter of the substrate  10  is larger than the diameter of the vibration element  20 . 
     The substrate  10  is composed of a metal material having good conductivity and elasticity (for example, an elastic modulus of 1 GPa or more). Specifically, the substrate  10  is preferably composed of 42 alloy, SUS (stainless steel), brass, phosphor bronze, or another material. In an exemplary aspect, the material of the substrate  10  can be a resin material such as a glass epoxy substrate other than metal, for example, provided that the elastic modulus is 1 GPa or more and may have a multilayer structure of multiple materials that are stacked. 
     The substrate  10  has the first substrate main surface  11  and a second substrate main surface  12  that are located as both sides in the thickness direction. In the state of assembly, the first substrate main surface  11  faces in the first direction, and the second substrate main surface  12  faces in the second direction. 
     The vibration element  20  includes a piezoelectric plate  23  and two electrodes  24  that are disposed on both main surfaces of the piezoelectric plate  23  and that put the piezoelectric plate  23  therebetween. 
     Moreover, the piezoelectric plate  23  is composed of piezoelectric ceramics such as PZT. The piezoelectric plate  23  is a disk-shaped component and has a first main surface  231  and a second main surface  232  that are located as both sides in the thickness direction. In the state of assembly, the first main surface  231  faces in the first direction, and the second main surface  232  faces in the second direction. 
     In operation, the two electrodes  24  apply a voltage to the piezoelectric plate  23  and consequently causes the diaphragm  2  to vibrate. The two electrodes  24  include a first electrode  21  and a second electrode  22 . Moreover, the first electrode  21  and the second electrode  22  are circular thin films. In the state of assembly, the first electrode  21  is disposed on the first main surface  231  of the piezoelectric plate  23 , and the second electrode  22  is disposed on the second main surface  232  of the piezoelectric plate  23 . 
     In other words, the first electrode  21  faces the lid  4 , and the second electrode faces the substrate  10 . The first electrode  21  is in contact with a pin terminal  5  of the two pin terminals  5 . 
     (Case Body  3 ) 
     The case body  3  is composed of an insulating material, such as ceramics or resin, and has a box shape in an exemplary aspect. The case body  3  includes the top wall portion  31 , a surrounding wall portion  32  that projects from the circumferential edge of the top wall portion  31 , and the cavity  33  that opens at a front end position on the surrounding wall portion  32  in a direction in which the surrounding wall portion  32  projects. 
     Moreover, the top wall portion  31  has a disk shape. The top wall portion  31  has a first top wall main surface  311  and a second top wall main surface  312  that are located as both sides in the thickness direction. In the state of assembly, the first top wall main surface  311  faces in the first direction, and the second top wall main surface  312  faces in the second direction. 
     A tone hole  313  is formed at the center of the top wall portion  31 . The tone hole  313  extends through the top wall portion  31  in the thickness direction (i.e., the Z-direction) and connects a portion inside the case body  3  to the outside. In this way, in the state of assembly, a sound that is produced when the diaphragm  2  vibrates is emitted from the case  6  to the outside through the tone hole  313 . 
     The surrounding wall portion  32  has a cylindrical shape. The surrounding wall portion  32  has an inner circumferential surface  35  and an outer circumferential surface  36 . For purposes of this description, the direction in which the surrounding wall portion  32  protrudes from the top wall portion  31  is referred to below as a “protrusion direction”, a position on the top wall portion  31  in the protrusion direction is referred to below as a “root position”, and a position on the cavity  33  in the protrusion direction is referred to below as the “front end position”. Moreover, a part of the surrounding wall portion  32  at the root position is referred to as a “root portion”, and a part of the surrounding wall portion  32  at the front end position is referred to as a “front end portion”. 
     The inner circumferential surface  35  includes a second inner circumferential surface  352  and a first inner circumferential surface  351  that are arranged in this order from the root position on the surrounding wall portion  32  in the protrusion direction toward the front end position. Moreover, the inner circumferential surface  35  includes the support surface  353  that connects the second inner circumferential surface  352  and the first inner circumferential surface  351  to each other and that is parallel to the top wall portion  31 . In other words, the support surface  353  is a step surface between the second inner circumferential surface  352  and the first inner circumferential surface  351 . 
     The support surface  353  is a surface that comes into contact with the second substrate main surface  12  of the substrate  10  of the diaphragm  2  when the diaphragm  2  is contained. Specifically, the support surface  353  supports the diaphragm  2  together with an upper surface  423  of the lid  4  described later with the diaphragm  2  put therebetween in the thickness direction. The shape of the support surface  353  in a plan view is a ring shape, the diameter of an outer circumferential edge is larger than the diameter of the substrate  10 , and the diameter of an inner circumferential edge is smaller than the diameter of the substrate  10 . 
     As for the second inner circumferential surface  352 , the root portion is connected to the top wall portion  31 , and the front end portion is connected to the inner circumference of the support surface  353 . The second inner circumferential surface  352  forms an acoustic space  302  that is located in the second direction in the interior space  30  together with the first top wall main surface  311 . 
     As for the first inner circumferential surface  351 , the root portion is connected to the outer circumferential edge of the support surface  353 , and the front end portion is connected to an upper surface  37  of the surrounding wall portion  32 . In the state of assembly, that is, a state in which the lid  4  is mounted on the case body  3 , the first inner circumferential surface  351  forms a space in which the lid  4  is contained. In addition, a groove portion  354  for engagement with a pawl portion  44  of the lid  4  described later is formed at the front end position on the first inner circumferential surface  351 . 
     (Lid  4 ) 
     In an exemplary aspect, the lid  4  is composed of, for example, the same material as the case body  3 , that is, an insulating material such as ceramics or resin. The lid  4  has a box shape. The lid  4  includes a top wall portion  41 , a surrounding wall portion  42  that protrudes from the circumferential edge of the top wall portion  41 , and a cavity  43  that opens at the front end position in a direction in which the surrounding wall portion  42  protrudes. 
     For purposes of this description, the direction in which the surrounding wall portion  42  protrudes from the top wall portion  41  is referred to below as a “protrusion direction”, a position on the top wall portion  41  in the protrusion direction is referred to below as a “root position”, and a position on the cavity  43  in the protrusion direction is referred to below as a “front end position”. A part of the surrounding wall portion  42  at the root position is referred to as a “root portion”, and a part of the surrounding wall portion  42  at the front end position is referred to as a “front end portion”. In the state of assembly, as illustrated in  FIG. 2 , the “root position (the root portion)” and the “front end position (the front end portion)” related to the lid  4  are opposite the “root position (the root portion)” and the “front end position (the front end portion)” related to the case body  3  described above. 
     In the exemplary aspect, the top wall portion  41  has a disk shape. The top wall portion  41  has a first top wall main surface  411  and a second top wall main surface  412  that are located as both sides in the thickness direction. In the state of assembly, the first top wall main surface  411  faces in the first direction, and the second top wall main surface  412  faces in the second direction. 
     Moreover, the top wall portion  41  has two through-holes  413  for receiving/fixing the two pin terminals  5 . The through-holes  413  extend through the top wall portion  41  in the thickness direction and connect a portion inside the lid  4  to the outside. 
     A fixation guide structure  100  (see, e.g.,  FIG. 5 ) for position fixation and posture guide of the two pin terminals  5  is disposed on the second top wall main surface  412  of the top wall portion  41 . The fixation guide structure  100  will be described in detail later. 
     The surrounding wall portion  42  has a cylindrical shape. The surrounding wall portion  42  has an inner circumferential surface  45  and an outer circumferential surface  46 . In the state of assembly, the inner circumferential surface  45  of the surrounding wall portion  42  forms an acoustic space  301  that is located in the second direction in the interior space  30  together with the second top wall main surface  412 . 
     A clearance  451  for preventing the inner circumferential surface  45  from interfering with installation of the two pin terminals  5  and movement of the two pin terminals  5  in the state of assembly is formed on the inner circumferential surface  45  at a part of the surrounding wall portion  42  that faces the upper surface  423 . 
     The pawl portion  44  is disposed at the root position of the outer circumferential surface  46 . During assembly, the pawl portion  44  is pushed into the groove portion  354  of the case body  3  and consequently engages with the groove portion  354  of the case body  3 . In this way, the lid  4  is mounted on the case body  3  by engaging the pawl portion  44  and the groove portion  354  with each other, and the case  6  is formed by closing the cavity  33  of the case body  3 . 
     (Pin Terminal  5 ) 
     The two pin terminals  5  include a first pin terminal  51  and a second pin terminal  52 . The first pin terminal  51  and the second pin terminal  52  are formed by folding respective lead wires the cross-sectional shape of which is substantially circular. This configuration of a folded shape enables the first pin terminal  51  and the second pin terminal  52  to have springiness. 
     In the state of assembly, the first pin terminal  51  and the second pin terminal  52  are mounted on the lid  4  with the fixation guide structure  100  and the two through-holes  413  that are formed in the top wall portion  41  of the lid  4  interposed therebetween. 
     In the state of assembly, the first pin terminal  51  and the second pin terminal  52  are in contact with the diaphragm  2  and are electrically connected to the diaphragm  2 . Specifically, as illustrated in  FIG. 2 , the first pin terminal  51  is in contact with the first electrode  21  of the diaphragm  2 , and the second pin terminal  52  is in contact with the substrate  10  of the diaphragm  2 . According to the first embodiment, the shape of the first pin terminal  51  and the shape of the second pin terminal  52  differ from each other. The first pin terminal  51  and the second pin terminal  52  will be described in detail later. 
     As for the piezoelectric sounding component  1  according to the first embodiment, an alternating voltage is applied in operation to the first electrode  21  and the second electrode  22  of the diaphragm  2  via the first pin terminal  51  and the second pin terminal  52 , and the diaphragm  2  then vibrates in the acoustic space  301  and the acoustic space  302  so as to reciprocate in the first direction and the second direction and sounds (e.g., rumbles). The produced sound is emitted from the case  6  to the outside mainly via the tone hole  313 . 
     &lt;Detail of First Pin Terminal  51  and Second Pin Terminal  52 &gt; 
     The first pin terminal  51  and the second pin terminal  52  will now be described in detail with reference to  FIG. 3  and  FIG. 4 .  FIG. 3  is a diagram for describing the structure of the first pin terminal  51  according to the first embodiment.  FIG. 4  is a diagram for describing the structure of the second pin terminal  52  according to the first embodiment. 
     For purposes of this description, end portions of the two pin terminals  5  that are located near the cavity  43  are referred to below as “front ends”, and end portions that are located outside the case  6  are referred to below as “rear ends” in some cases. The directions of the lead wires that form the respective two pin terminals  5  are referred to as “lead wire extension directions”, and directions from rear ends in the lead wire extension directions regarding portions of the two pin terminals  5  toward the front end position are referred to as “extension directions” in some cases. 
     (Structure of First Pin Terminal  51 ) 
     As illustrated in  FIGS. 2 and 3 , the first pin terminal  51  includes a terminal body  511 , a mount portion  513 , and an extended portion  512  as seen in the lead wire extension direction of the first pin terminal  51 . The extension directions of the mount portion  513  and the extended portion  512  are the same. The extension direction of the terminal body  511  differs from the extension directions of the mount portion  513  and the extended portion  512 . 
     In the state of assembly, the terminal body  511  is located in the acoustic space  301  of the interior space  30 , and the front end thereof is in contact with the first electrode  21  of the diaphragm  2 . The mount portion  513  is inserted in the through-hole  413  of the lid  4 . The extended portion  512  extends from the interior space  30  to the outside and is to be mounted on an external substrate (not illustrated). 
     As illustrated in  FIG. 3 , the terminal body  511  has a substantially U-shape. Specifically, the terminal body  511  includes a first bent portion  5111 , an extension portion  5114  that straightly extends, a second bent portion  5112 , a rising portion  5116  that straightly extends, and a contact portion  5113  in the lead wire extension direction. 
     The first bent portion  5111  is connected to the mount portion  513 . The first bent portion  5111  connects the mount portion  513  and the extended portion  512  to the extension portion  5114 . The extension direction of the extension portion  5114  intersects the extension directions of the mount portion  513  and the extended portion  512  due to the first bent portion  5111 . According to the first embodiment, the extension direction of the extension portion  5114  is substantially perpendicular to the extension directions of the mount portion  513  and the extended portion  512 . 
     In the exemplary aspect, the proportion of bend of the second bent portion  5112  is smaller than that of the first bent portion  5111 . The second bent portion  5112  connects the extension portion  5114  and the rising portion  5116  to each other. The extension direction of the rising portion  5116  is opposite the extension direction of the extension portion  5114  due to the second bent portion  5112 . In addition, the rising portion  5116  rises from the extension portion  5114  due to the second bent portion  5112 . 
     In the state of assembly of the terminal body  511 , the extension portion  5114  extends substantially along the second top wall main surface  412  of the lid  4  due to the first bent portion  5111 . A part of the second bent portion  5112  at a rear end position is in contact with the second top wall main surface  412  and another part at the front end position rises from the second top wall main surface  412 . In other words, the terminal body  511  starts to tilt from the second bent portion  5112  with respect to the second top wall main surface  412  in the second direction of a Z-axis. The rising portion  5116  rises from the second top wall main surface  412  of the lid  4  due to the second bent portion  5112 . In this way, the extension portion  5114 , the second bent portion  5112 , and the rising portion  5116  form a spring structure of the first pin terminal  51 . With the spring structure of the first pin terminal  51 , the contact portion  5113  is in contact with the first electrode  21  of the diaphragm  2  as shown in  FIG. 2 . 
     (Structure of Second Pin Terminal  52 ) 
     As illustrated in  FIGS. 2 and 4 , the second pin terminal  52  includes a terminal body  521 , a mount portion  523 , and an extended portion  522  as seen in the lead wire extension direction of the second pin terminal  52 . The extension directions of the mount portion  523  and the extended portion  522  are the same. The extension direction of the terminal body  521  differs from the extension directions of the mount portion  523  and the extended portion  522 . 
     In the state of assembly, the terminal body  521  is located in the acoustic space  301  of the interior space  30 , and the front end thereof is in contact with the substrate  10  of the diaphragm  2 . The mount portion  523  is inserted in the through-hole  413  of the lid  4 . The extended portion  522  extends from the interior space  30  to the outside and is to be mounted on the external substrate (not illustrated). 
     As illustrated in  FIG. 4 , the terminal body  521  has a substantially L-shape. Specifically, the terminal body  521  includes a first bent portion  5211 , an extension portion  5214  that straightly extends, a third bent portion  5215 , a rising portion  5216  that straightly extends, a second bent portion  5212 , a rising portion  5218  that straightly extends, and a contact portion  5213  in the lead wire extension direction. 
     The first bent portion  5211  is connected to the mount portion  523 . The first bent portion  5211  connects the mount portion  523  and the extended portion  522  to the extension portion  5214 . The extension direction of the extension portion  5214  intersects the extension directions of the mount portion  523  and the extended portion  522  due to the first bent portion  5211 . According to the first embodiment, the extension direction of the extension portion  5214  is substantially perpendicular to the extension directions of the mount portion  523  and the extended portion  522 . 
     The third bent portion  5215  connects the extension portion  5214  and the rising portion  5216  to each other. The extension direction of the rising portion  5216  intersects the extension direction of the extension portion  5214  due to the third bent portion  5215 . In addition, the rising portion  5216  rises from the extension portion  5214  due to the third bent portion  5215 . 
     The second bent portion  5212  connects the rising portion  5216  and the rising portion  5218  to each other. The extension direction of the rising portion  5218  intersects the extension direction of the rising portion  5216  due to the second bent portion  5212 . In addition, the rising portion  5218  rises from the rising portion  5216  due to the second bent portion  5212 . 
     In the state of assembly of the terminal body  521 , the extension portion  5214  extends substantially along the second top wall main surface  412  of the lid  4  due to the first bent portion  5211 . In addition, a part of the third bent portion  5215  at the rear end position is in contact with the second top wall main surface  412 , and another part at the front end position rises from the second top wall main surface  412 . In other words, the terminal body  521  starts to tilt from the third bent portion  5215  with respect to the second top wall main surface  412  in the second direction of the Z-axis. The third bent portion  5215  is in contact with a recessed portion of the inner circumferential surface  45  of the lid  4 . The rising portion  5216  and the rising portion  5218  are formed along the inner circumferential surface  45  of the lid  4  due to the second bent portion  5212  and rises from the second top wall main surface  412  of the lid  4  due to the third bent portion  5215  and the second bent portion  5212 . In this way, the extension portion  5214 , the third bent portion  5215 , the rising portion  5216 , the second bent portion  5212 , and the rising portion  5218  form a spring structure of the second pin terminal  52 . With the spring structure of the second pin terminal  52 , the contact portion  5213  is in contact with the substrate  10  of the diaphragm  2 . For this reason, the contact portion  5213  of the second pin terminal  52  is connected to the second electrode  22  of the diaphragm  2  with the substrate  10  interposed therebetween. 
     &lt;Detail of Fixation Guide Structure  100  of Lid  4 &gt; 
     The fixation guide structure  100  of the lid according to the first embodiment will now be described in detail with reference to  FIG. 5 ,  FIG. 6 ,  FIG. 11 , and  FIG. 12 .  FIG. 5  is a diagram for describing the fixation guide structure  100  of the lid  4  according to the first embodiment.  FIG. 6  is a diagram for describing the state of assembly of the two pin terminals  5  and the lid  4  according to the first embodiment.  FIG. 11  is a sectional view for describing the structure of a first fixing portion  210  and a second fixing portion  220  of the lid  4  in a comparative example.  FIG. 12  is a diagram for describing the state of assembly of the two pin terminals  5  and the lid  4  in the comparative example. 
     (Structure of Fixation Guide Structure  100 ) 
     The structure of the fixation guide structure  100  will now be described with reference to  FIG. 5 . As illustrated in  FIG. 5 , the fixation guide structure  100  is disposed so as to protrude from the second top wall main surface  412  of the lid  4 . According to the first embodiment, the fixation guide structure  100  includes a first fixation guide structure  110  for position fixation and posture guide of the first pin terminal  51  and a second fixation guide structure  120  for position fixation and posture guide of the second pin terminal  52 . 
     The first fixation guide structure  110  includes a first fixing portion  111  that fixes the position of the first bent portion  5111  of the first pin terminal  51  and a first guide portion  112  that is in contact with the second bent portion  5112  of the first pin terminal  51  and that guides the posture of the first pin terminal  51 . 
     As seen from the perspective that the orientation of the contact portion  5113  of the first pin terminal  51  is maintained, the first fixation guide structure  110  includes the first fixing portion  111  that directs the orientation of the contact portion  5113  in a plan view of the second top wall main surface  412  of the lid  4  and the first guide portion  112  that directs the orientation of the contact portion  5113  in the direction intersecting the second top wall main surface  412  of the lid  4 . 
     In a plan view, the first fixing portion  111  and the first guide portion  112  are disposed at different positions on the lid  4 . The first guide portion  112  is disposed at a position nearer than the first fixing portion  111  to the circumferential edge of the second top wall main surface  412  of the lid  4 . 
     The first fixing portion  111  is disposed around the opening of the through-hole  413  of the lid  4 . As shown, the first fixing portion  111  has a U-shape in a plan view. A U-shaped opening is formed so as to approach the circumferential edge of the second top wall main surface  412  that is located near the first guide portion  112 . The first fixing portion  111  includes two wall portions  115  and has a gap  113  that is formed between the two wall portions  115 . The gap  113  is an example of a fixing portion gap. In a plan view, the center line L 13  of the gap  113  passes through the through-hole  413 . 
     The first guide portion  112  is disposed near the circumferential edge of the second top wall main surface  412  of the lid  4  at a position away from a line on which the gap  113  extends. In other words, the first guide portion  112  is formed near the inner circumferential surface  45  of the lid  4 . The first guide portion  112  has a block shape in a plan view. The first guide portion  112  includes two wall portions  116  and has a gap  114  that is formed between the two wall portions  116 . The gap  114  is an example of a guide portion gap. In a plan view, the center line L 14  of the gap  114  bends. The center line L 14  of the gap  114  intersects the center line L 13  of the gap  113 . 
     The second fixation guide structure  120  includes a second fixing portion  121  that fixes the position of the first bent portion  5211  of the second pin terminal  52  and a second guide portion  122  that is in contact with the rising portion  5216  located near the second bent portion  5212  of the second pin terminal  52  and that guides the posture of the second pin terminal  52 . 
     As seen from the perspective that the orientation of the contact portion  5213  of the second pin terminal  52  is maintained, the second fixation guide structure  120  includes the second fixing portion  121  that directs the orientation of the contact portion  5213  in a plan view of the second top wall main surface  412  of the lid  4  and the second guide portion  122  that directs the orientation of the contact portion  5213  in the direction intersecting the second top wall main surface  412  of the lid  4 . 
     In a plan view, the second fixing portion  121  and the second guide portion  122  are disposed at different positions on the lid  4 . The second guide portion  122  is disposed at a position nearer than the second fixing portion  121  to the circumferential edge of the second top wall main surface  412  of the lid  4 . 
     The second fixing portion  121  is disposed around the opening of the through-holes  413  of the lid  4 . As further shown, the second fixing portion  121  has a U-shape in a plan view. A U-shaped opening is formed so as to approach the circumferential edge of the second top wall main surface  412  that is located near the second guide portion  122 . The second fixing portion  121  includes two wall portions  125  and has a gap  123  that is formed between the two wall portions  125 . The gap  123  is an example of the fixing portion gap. In a plan view, the center line L 23  of the gap  123  passes through the through-hole  413 . 
     The second guide portion  122  is disposed at the circumferential edge of the second top wall main surface  412  of the lid  4  at a position away from a line on which the gap  123  extends. In other words, the second guide portion  122  is formed so as to be in contact with the inner circumferential surface  45  of the lid  4 . The second guide portion  122  has a block shape in a plan view. The second guide portion  122  has no gap. 
     (Assembly of Two Pin Terminals  5  and Lid  4 ) 
     Assembly of the two pin terminals  5  and the lid  4  will now be described with reference to  FIG. 6 . As illustrated in  FIG. 6 , the first pin terminal  51  and the second pin terminal  52  are mounted on the lid  4  by using the two through-holes  413  and the fixation guide structure  100 . 
     When the first pin terminal  51  is installed on the lid  4 , the mount portion  513  of the first pin terminal  51  is inserted into the through-hole  413 . The terminal body  511  of the first pin terminal  51  is installed on the first fixing portion  111  and the first guide portion  112 . Specifically, as illustrated in  FIG. 6 , a part of the extension portion  5114  and the first bent portion  5111  of the terminal body  511  are inserted into the gap  113  of the first fixing portion  111 . The second bent portion  5112  is pushed into the gap  114  of the first guide portion  112 . 
     After the first pin terminal  51  is installed on the lid  4 , the two wall portions  115  of the first fixing portion  111  are crimped against each other so as to put the part of the extension portion  5114  and the first bent portion  5111  therebetween. The two wall portions  116  of the first guide portion  112  are crimped against each other so as to put the second bent portion  5112  therebetween. 
     After crimping, end portions of the two wall portions  115  are connected to each other, and end portions of the two wall portions  116  are also connected to each other. That is, the first fixing portion  111  and the first guide portion  112  each have a tunnel shape (not illustrated). For this reason, the part of the extension portion  5114  and the first bent portion  5111  are formed so as to be embedded in the first fixing portion  111 . The part of the second bent portion is formed so as to be surrounded by the first guide portion  112 . 
     When the second pin terminal  52  is installed on the lid  4 , the mount portion  523  of the second pin terminal  52  is inserted into the through-hole  413 . The terminal body  521  of the second pin terminal  52  is installed on the second fixing portion  121  and the second guide portion  122 . Specifically, as illustrated in  FIG. 6 , a part of the extension portion  5214  and the first bent portion  5211  of the terminal body  521  are pushed into the gap  123  of the second fixing portion  121 . A part near the second bent portion  5212 , that is, the rising portion  5216  is disposed so as to be in contact with an end portion of the second guide portion  122 . The third bent portion  5215  is in contact with the recessed portion of the inner circumferential surface  45  of the lid  4 . 
     After the second pin terminal  52  is installed on the lid  4 , the two wall portions  125  of the second fixing portion  121  are crimped against each other so as to put the part of the extension portion  5214  and the first bent portion  5211  therebetween. After crimping, end portions of the two wall portions  125  are connected to each other. That is, the second fixing portion  121  has a tunnel shape. For this reason, the part of the extension portion  5214  and the first bent portion  5211  are formed so as to be embedded in the second fixing portion  121 . In addition, the second bent portion is supported by the second guide portion  122 . 
     (Effects of Fixation Guide Structure  100 ) 
     The effects of the fixation guide structure  100  according to the first exemplary embodiment will now be described with reference to  FIG. 2 ,  FIG. 5 ,  FIG. 6 ,  FIG. 11 , and  FIG. 12  and compared with those of a fixation structure  200  in a comparative example. A difference between the fixation structure  200  in the comparative example and the fixation guide structure  100  according to the first embodiment is that the fixation structure  200  in the comparative example does not include the first guide portion  112  and the second guide portion  122  of the fixation guide structure  100  according to the first embodiment. 
     Some cases referred to below as “when stress is created” for convenience of description are the cases where, when the piezoelectric sounding component  1  is inserted into the mounting substrate, the extended portion  512  and the extended portion  522  of the two pin terminals  5  that are located outside the case  6  are cut, and because of, for example, this, stress is applied to portions of the two pin terminals  5  on which a process such as cutting is performed. 
     (Effects of First Fixing Portion  111  and First Guide Portion  112 ) 
     As for the first pin terminal  51 , the position of the terminal body  511  with respect to the lid  4  is fixed by the first fixing portion  111  and the first guide portion  112 , and the posture with respect to the lid  4  is guided by the first guide portion  112 . 
     Specifically, in the exemplary aspect, the part of the extension portion  5114  and the first bent portion  5111  of the terminal body  511  are crimped by the two wall portions  115  of the first fixing portion  111 . For this reason, when stress is created, movement (e.g., misalignment) of the terminal body  511  in the direction perpendicular to the center line L 13  of the first fixing portion  111  is restricted on an XY place. The part of the second bent portion  5112  of the terminal body  511  is crimped by the two wall portions  116  of the first guide portion  112 . For this reason, when stress is created, movement (e.g., misalignment) of the terminal body  511  in the direction perpendicular to the center line L 14  of the first guide portion  112  is restricted on the XY plane. 
     Moreover, the center line L 13  and the center line L 14  intersect each other as described above. For this reason, when stress is created, movement (e.g., misalignment) of the terminal body  511  in the directions of XY axes with respect to the lid  4  is restricted by the first fixing portion  111  and the first guide portion  112 . Consequently, in a plan view, the position of the terminal body  511  with respect to the lid  4  is fixed, and the orientation of the contact portion  5113  with respect to the lid  4  is maintained in a predetermined direction. In other words, the orientation of the contact portion  5113  in a plan view of the second top wall main surface  412  of the lid  4  is directed by the first fixing portion  111  and the first guide portion  112 . Even when stress is created in the state of assembly, the position at which the contact portion  5113  and the first electrode  21  are in contact with each other is maintained in the directions of the XY axes by using the first fixing portion  111  and the first guide portion  112 . 
     After crimping, the first fixing portion  111  and the first guide portion  112  have a tunnel shape. In other words, the first fixing portion  111  and the first guide portion  112  include respective ceiling portions. For this reason, when stress is created, the terminal body  511  is inhibited from rotating in the first direction and the second direction of the Z-axis about a portion at which the first bent portion  5111  and the mount portion  523  are connected to each other by using the ceiling portion of the first fixing portion  111  and the second top wall main surface  412  of the lid  4 . In other words, even when stress is created, movement (e.g., misalignment) is restricted in the direction of the Z-axis of the first bent portion  5111  and the extension portion  5114  that extends along the second top wall main surface  412  by using the first fixing portion  111 . 
     When stress is created, the second bent portion  5112  that tilts with respect to the second top wall main surface  412  is inhibited from rotating in the first direction of the Z-axis about a portion of the terminal body  511  at which the second bent portion  5112  and the second top wall main surface  412  of the lid  4  are in contact with each other by using the ceiling portion of the first guide portion  112 . In addition, as for the second bent portion  5112 , tilting posture, that is, posture of the rise from the second top wall main surface  412  of the lid  4  is supported by parts of the crimped wall portions  115  that are away from the second bent portion  5112  in the second direction of the Z-axis. For this reason, when stress is created, the terminal body  511  is inhibited from rotating in the second direction of the Z-axis about the portion at which the second bent portion  5112  and the second top wall main surface  412  of the lid  4  are in contact with each other. In this way, when stress is created in the state of assembly, movement (e.g., misalignment) of the second bent portion  5112  in the direction of the Z-axis is restricted by the first guide portion  112 . For this reason, movement (e.g., misalignment) of the rising portion  5116  and the contact portion  5113  that are connected to the second bent portion  5112  in the direction of the Z-axis is also restricted. In other words, the orientation of the contact portion  5113  in the direction intersecting the second top wall main surface  412  of the lid  4  is directed by the first guide portion  112 . 
     Consequently, when the first pin terminal  51  is mounted on the lid  4  before the state of assembly, the posture of the contact portion  5113  is guided by the first guide portion  112 , such that the distance from the contact portion  5113  to the second top wall main surface  412  of the lid  4  is maintained at a predetermined value in the direction of the Z-axis. Even when stress is created in the state of assembly, the position at which the contact portion  5113  and the first electrode  21  are in contact with each other can be maintained in the direction of the Z-axis by using the first guide portion  112 . 
     As illustrated in  FIG. 11  and  FIG. 12 , however, the fixation structure  200  in the comparative example does not include the first guide portion  112  according to the first embodiment. That is, the posture of the second bent portion  5112  in the comparative example is not supported. For this reason, when stress is created, there is a possibility that a rising part of the second bent portion  5112  in the comparative example rotates in the second direction of the Z-axis about the portion at which the second bent portion  5112  and the second top wall main surface  412  of the lid  4  are in contact with each other. As a result, the rising portion  5116  and the contact portion  5113  in comparative example that are connected to the second bent portion  5112  in the comparative example moves (e.g., misalignment) in the direction of the Z-axis. Consequently, in the comparative example, when the first pin terminal  51  is mounted on the lid  4  before the state of assembly, the distance from the contact portion  5113  to the second top wall main surface  412  of the lid  4  decreases in the direction of the Z-axis. In the state of assembly, there is a possibility that pressure that is applied by the contact portion  5113  in the comparative example to the first electrode  21  lacks, and the failure of contact between the contact portion  5113  and the first electrode  21  occurs. 
     According to the first exemplary embodiment, the first pin terminal  51  is thus fixed to the lid  4  at constant posture by using the first fixing portion  111  and the first guide portion  112 . When the first pin terminal  51  is mounted on the lid  4  before the state of assembly, the orientation of the contact portion  5113  of the first pin terminal  51  in a plan view of the second top wall main surface  412  of the lid  4  and the orientation of the contact portion  5113  in the direction intersecting the second top wall main surface  412  of the lid  4  are directed. In other words, in this case, the orientation of the contact portion  5113  of the first pin terminal  51  is maintained in a predetermined direction of the directions of the XY axes, and the distance from the contact portion  5113  to the second top wall main surface  412  of the lid  4  is maintained at a predetermined value in the direction of the Z-axis. For this reason, the first pin terminal  51  can keep a predetermined spring force. Even when stress is created in the state of assembly, the position at which the contact portion  5113  of the first pin terminal  51  and the first electrode  21  of the diaphragm  2  are in contact with each other and the pressure that is applied by the contact portion  5113  to the first electrode  21  are maintained at a predetermined position and a predetermined value. 
     (Effects of Second Fixing Portion  121  and Second Guide Portion  122 ) 
     As for the second pin terminal  52 , the position of the terminal body  521  with respect to the lid  4  is fixed by the second fixing portion  121  and the second guide portion  122 , and the posture with respect to the lid  4  is guided by the second guide portion  122 . 
     Specifically, the part of the extension portion  5214  and the first bent portion  5211  of the terminal body  521  are crimped by the two wall portions  125  of the second fixing portion  121 . For this reason, when stress is created, movement (e.g., misalignment) of the terminal body  521  in the direction perpendicular to the center line L 23  of the second fixing portion  121  is restricted on the XY plane. The third bent portion  5215  of the terminal body  521  is supported by the recessed portion of the inner circumferential surface  45  of the surrounding wall portion  42 . For this reason, when stress is created, movement (e.g., misalignment) of the terminal body  521  in the direction along the center line L 23  is restricted on the XY plane. For this reason, when stress is created, movement (e.g., misalignment) of the terminal body  521  with respect to the lid  4  in the directions of the XY axes is restricted. Consequently, in a plan view, the position of the terminal body  521  with respect to the lid  4  is fixed, and the orientation of the contact portion  5213  with respect to the lid  4  is maintained in a predetermined direction. In other words, the orientation of the contact portion  5213  in a plan view of the second top wall main surface  412  of the lid  4  is directed by the second fixing portion  121 . Even when stress is created in the state of assembly, the position at which the contact portion  5213  and the substrate  10  are in contact with each other is maintained in the directions of the XY axes by using the second fixing portion  121 . 
     After crimping, the second fixing portion  121  has a tunnel shape. In other words, the second fixing portion  121  includes a ceiling portion. In this way, when stress is created, movement (e.g., misalignment) is restricted in the direction of the Z-axis of the first bent portion  5211  of the terminal body  521  and the extension portion  5214  that extends along the second top wall main surface  412  by using the second fixing portion  121  and the second top wall main surface  412  of the lid  4 . 
     As for the third bent portion  5215 , the rising portion  5216 , and the second bent portion  5212  that tilt with respect to the second top wall main surface  412 , the rising portion  5216  that is located near the second bent portion  5212  is supported by the second guide portion  122  that is away from the second bent portion  5212  in the second direction of the Z-axis. For this reason, the tilting posture of the third bent portion  5215 , the rising portion  5216 , and the second bent portion  5212 , that is, the posture of the rise from the second top wall main surface  412  of the lid  4  is supported. In this way, when stress is created, the terminal body  521  is inhibited from rotating in the second direction of the Z-axis about the portion at which the third bent portion  5215  and the second top wall main surface  412  of the lid  4  are in contact with each other is restricted by the support of the second guide portion  122 . 
     In this case, the dimensions of the wall portions  125  of the second fixing portion  121  in the longitudinal direction are longer than the dimensions of the wall portions  115  of the first fixing portion  111  in the longitudinal direction. As a result, the force of the wall portions  125  of the second fixing portion  121  for restricting movement (e.g., misalignment) of the terminal body  521  in the first direction of the directions of the Z-axis is greater than that of the first fixing portion  111 . For this reason, rotation of the terminal body  521  in the first direction of the Z-axis about the portion at which the third bent portion  5215  and the second top wall main surface  412  of the lid  4  are in contact with each other can be restricted by using the ceiling portion of the second fixing portion  121  even when the second guide portion  122  includes no ceiling portion. In this way, when stress is created, movement (e.g., misalignment) of the third bent portion  5215 , the rising portion  5216 , and the second bent portion  5212  in the direction of the Z-axis is restricted by the second guide portion  122 . For this reason, movement (e.g., misalignment) of the rising portion  5218  and the contact portion  5213  that are connected to the second bent portion  5212  in the direction of the Z-axis is also restricted. In other words, the orientation of the contact portion  5113  in the direction intersecting the second top wall main surface  412  of the lid  4  is directed by the second guide portion  122 . 
     Consequently, the posture of the contact portion  5213  is guided by the second guide portion  122  such that the distance from the contact portion to the second top wall main surface  412  of the lid  4  is maintained at a predetermined value in the direction of the Z-axis. Even when stress is created in the state of assembly, the position at which the contact portion  5213  and the substrate  10  are in contact with each other is maintained in the direction of the Z-axis by the second guide portion  122 . 
     As illustrated in  FIG. 11  and  FIG. 12 , however, the fixation structure  200  in the comparative example does not include the second guide portion  122  according to the first embodiment as described above. That is, the posture of the third bent portion  5215 , the rising portion  5216 , and the second bent portion  5212  in the comparative example is not supported. For this reason, when stress is created, there is a possibility that the third bent portion  5215 , the rising portion  5216 , and a rising part of the second bent portion  5212  in the comparative example rotate in the second direction of the Z-axis about the portion at which the third bent portion  5215  and the second top wall main surface  412  of the lid  4  are in contact with each other. For this reason, the rising portion  5216  and the contact portion  5213  that are connected to the second bent portion  5112  in the comparative example move (e.g., misalignment) in the direction of the Z-axis. Consequently, in the comparative example, when the first pin terminal  51  is mounted on the lid  4  before the state of assembly, the distance from the contact portion  5213  to the second top wall main surface  412  of the lid  4  decreases in the direction of the Z-axis. In the state of assembly, there is a possibility that the pressure that is applied by the contact portion  5213  in the comparative example to the first electrode  21  lacks, and the failure of contact between the contact portion  5213  and the first electrode  21  occurs. 
     The second pin terminal  52  is thus fixed to the lid  4  at constant posture by using the second fixing portion  121  and the second guide portion  122  according to the first embodiment. When the second pin terminal  52  is mounted on the lid  4  before the state of assembly, the orientation of the contact portion  5213  of the second pin terminal  52  in a plan view of the second top wall main surface  412  of the lid  4  and the orientation of the contact portion  5213  in the direction intersecting the second top wall main surface  412  of the lid  4  are directed. In other words, in this case, the orientation of the contact portion  5213  of the second pin terminal  52  is maintained in a predetermined direction of the directions of the XY axes, and the distance from the contact portion  5213  to the second top wall main surface  412  of the lid  4  is maintained at a predetermined value in the direction of the Z-axis. In other words, the second pin terminal  52  can have a predetermined spring force. For this reason, when stress is created in the state of assembly, the position at which the contact portion  5213  of the second pin terminal  52  and the substrate  10  of the diaphragm  2  are in contact with each other and the pressure that is applied by the contact portion  5213  to the substrate  10  are maintained at a predetermined position and a predetermined value. 
     Accordingly, when stress is created, the two pin terminals  5  can be inhibited from moving (e.g., misalignment) in the directions of the XYZ-axes by using the first fixing portion  111 , the second fixing portion  121 , the first guide portion  112 , and the second guide portion  122  according to the first embodiment. As such, even when stress is created, the state of contact between the front end portions of the two pin terminals  5  and the diaphragm  2  does not change from that when no stress is created and can be maintained. The reliability of contact between the front end portions of the two pin terminals  5  and the diaphragm  2  can be improved unlike the case where the first guide portion  112  and the second guide portion  122  are not used. Consequently, variations in the sounding characteristics of the piezoelectric sounding component  1  due to a change in the state of contact between the front end portions of the two pin terminals  5  and the diaphragm  2  and the occurrence of a sound impairment due to the failure of contact between the two pin terminals  5  and the diaphragm  2  can be reduced. That is, the fixation guide structure  100  according to the first embodiment enables a piezoelectric sounding component that can have good reliability to be provided. 
     [Additional Exemplary Embodiments of Fixation Guide Structure  100 ] 
     Structures according to additional exemplary embodiments of the fixation guide structure  100  will now be described with reference to  FIG. 7  to  FIG. 10 .  FIG. 7  is a diagram for describing a fixation guide structure  100  of a lid  4  according to a second exemplary embodiment.  FIG. 8  is a diagram for describing an example of the state of assembly of two pin terminals  5  and the lid  4  according to the second exemplary embodiment.  FIG. 9  is a diagram for describing a fixation guide structure  100  of a lid  4  according to a third exemplary embodiment.  FIG. 10  is a diagram for describing the state of assembly of two pin terminals  5  and the lid  4  according to the third exemplary embodiment. 
     In the following description, the description of matters according to the second embodiment and the third embodiment common to those according to the first embodiment is omitted, and only differences will be described. In particular, the same actions and effects achieved by the same structures are not repeated herein. 
     Second Exemplary Embodiment 
     The structure of the fixation guide structure  100  of the lid  4  according to the second embodiment will now be described with reference to  FIG. 7  and  FIG. 8 . As illustrated in  FIG. 7  and  FIG. 8 , the structure of the fixation guide structure  100  and a second pin terminal  52  according to the second embodiment differs from the structure of the fixation guide structure  100  and the second pin terminal  52  according to the first embodiment. 
     Specifically, as for the fixation guide structure  100  according to the second embodiment, a first fixation guide structure  110  does not include the first guide portion  112  of the first fixation guide structure  110  according to the first embodiment. A second fixation guide structure  120  according to the second embodiment differs from the second fixation guide structure  120  according to the first embodiment. 
     Moreover, as for the second fixation guide structure  120  according to the second embodiment, the dimensions of two wall portions  125  of the second fixing portion  121  in the longitudinal direction are shorter than the dimensions of the two wall portions  125  of the second fixing portion  121  according to the first embodiment in the longitudinal direction. A second guide portion  122  according to the second embodiment includes two wall portions  126  and has a gap  124  that is formed between the two wall portions  126 . In a plan view, the center line L 24  of the gap  124  is formed such that the second fixing portion  121  according to the second embodiment intersects the center line L 23  of the gap  123 . 
     As illustrated in  FIG. 8 , a terminal body  521  of the second pin terminal  52  according to the second embodiment includes the first bent portion  5211 , the extension portion  5214  that straightly extends, the third bent portion  5215 , an extension portion  5219  that straightly extends, the second bent portion  5212 , the rising portion  5218  that straightly extends, and the contact portion  5213  in the lead wire extension directions. In other words, the terminal body  521  according to the second embodiment start to tilt from the second bent portion  5212  with respect to the second top wall main surface  412  in the second direction of the Z-axis unlike the terminal body  521  according to the first embodiment. 
     According to the second embodiment, the second guide portion  122  is thus used only for the second pin terminal  52 , and the structure of the fixation guide structure  100  can be consequently simplified. The second guide portion  122  according to the second embodiment has a structure similar to that of the first guide portion  112  according to the first embodiment. For this reason, when stress is created, the terminal body  521  is inhibited from rotating in the first direction and the second direction of the Z-axis about the portion at which the second bent portion  5212  and the second top wall main surface  412  are in contact with each other by using the ceiling portion of the second guide portion  122  crimped and the two wall portions  126  of the second guide portion  122  crimped. For this reason, when stress is created, movement (e.g., misalignment) is restricted in the direction of the Z-axis of the first bent portion  5111  and the extension portion  5114  that extends along the second top wall main surface  412  by using the second guide portion  122  even when the dimensions of the two wall portions  125  of the second fixing portion  121  according to the second embodiment in the longitudinal direction are decreased. 
     In addition, the extension portion  5214  and the extension portion  5219  of the second pin terminal  52  according to the second embodiment are shorter than the extension portion  5214  and the extension portion  5219  of the second pin terminal  52  according to the first embodiment. The second guide portion  122  according to the second embodiment is disposed inside the circumferential edge of the second top wall main surface  412  at a position farther therefrom than the second guide portion  122  according to the first embodiment. According to the second embodiment, because of these, contact between the second pin terminal  52  and the inner circumferential surface  45  of the lid  4  in the state of assembly can be avoided. For this reason, the reliability of contact between the second pin terminal  52  and the substrate  10  is also improved. 
     Third Exemplary Embodiment 
     The structure of the fixation guide structure  100  of the lid  4  according to the third exemplary embodiment will now be described with reference to  FIG. 9  and  FIG. 10 . As illustrated in  FIG. 9  and  FIG. 10 , the structure of the second fixation guide structure  120  and the second pin terminal  52  according to the third embodiment is the same as the structure of the second fixation guide structure  120  and the second pin terminal  52  according to the second embodiment. For this reason, the description of the structure of the second fixation guide structure  120  and the second pin terminal  52  according to the third embodiment is omitted. 
     The structure of a first fixation guide structure  110  and a first pin terminal  51  according to the third embodiment differs from the structure of the first fixation guide structure  110  and the first pin terminal  51  according to the first embodiment and the second embodiment. 
     Specifically, the first fixation guide structure  110  according to the third embodiment includes a first fixing portion  111  and a first guide portion  112 . The first fixing portion  111  according to the third embodiment has the same shape as that of the second fixing portion  121  according to the second embodiment, and the first guide portion  112  has the same shape as that of the second guide portion  122  according to the second embodiment. 
     As illustrated in  FIG. 10 , a terminal body  511  of the first pin terminal  51  according to the third embodiment includes the first bent portion  5111 , the extension portion  5114  that straightly extends, the third bent portion  5115 , an extension portion  5117  that straightly extends, the second bent portion  5112 , a rising portion  5118  that straightly extends, and the contact portion  5113  in the lead wire extension directions. The terminal body  521  according to the third embodiment starts to tilt from the second bent portion  5212  with respect to the second top wall main surface  412  in the second direction. 
     As for the first guide portion  112  according to the third embodiment, in the state of assembly, the extension portion  5117  that straightly extends along the second top wall main surface  412  is crimped unlike to the first guide portion  112  according to the first embodiment. 
     According to the third embodiment, the first guide portion  112  and the second guide portion  122  are thus used for the first pin terminal  51  and the second pin terminal  52 . Consequently, when stress is created, the terminal body  511  is inhibited from rotating in the first direction and the second direction of the Z-axis about the portion at which the second bent portion  5112  and the second top wall main surface  412  are in contact with each other with certainty, and the terminal body  521  can be inhibited from rotating in the first direction and the second direction of the Z-axis about the portion at which the second bent portion  5212  and the second top wall main surface  412  are in contact with each other. For this reason, the reliability of contact between the second pin terminal  52  and the substrate  10  is improved. 
     According to the third embodiment, as for the first guide portion  112 , the extension portion  5117  that straightly extends along the second top wall main surface  412  is crimped, and the posture of the extension portion  5117  can be supported with certainty. For this reason, the posture of the second bent portion  5112  that is connected to the extension portion  5117 , the rising portion  5118  that straightly extends, and the contact portion  5113  can be guided such that these rise from the second top wall main surface  412  with certainty. 
     In general, it is noted that the embodiments of the present invention are described above by way of example. The piezoelectric sounding component  1  according to an embodiment of the present invention includes the diaphragm  2  that vibrates when a voltage is applied thereto, the case  6  that includes the case body  3  having the cavity  33  and the lid  4  disposed such that the lid  4  closes the cavity  33  of the case body  3  and that contains the diaphragm  2  in the interior space  30  that is formed by the case body  3  and the lid  4 , and the two pin terminals  5  that are disposed on the lid such that the two pin terminals  5  are in contact with the diaphragm  2 . At least one of the pin terminals  5  includes the extended portion  512  (or the extended portion  522 ) that extends from the interior space to the outside, the extension portion  5114  (or the extension portion  5214 ) that extends along the second top wall main surface  412  of the lid  4  in the interior space  30 , the rising portion  5116  (or the rising portion  5216 ) that rises from the extension portion  5114  (or the extension portion  5214 ), and the contact portion  5113  (or the contact portion  5213 ) that is disposed at an end of the rising portion  5116  (or the rising portion  5216 ) and that is in contact with the diaphragm  2 . Moreover, the first fixing portion  111  (or the second fixing portion  121 ) that fixes the position of the first bent portion  5111  (or the first bent portion  5211 ) between the extended portion  512  (or the extended portion  522 ) and the extension portion  5114  (or the extension portion  5214 ) and the first guide portion  112  (or the second guide portion  122 ) that is in contact with the second bent portion  5112  (or the second bent portion  5212 ) between the extension portion  5114  (or the extension portion  5214 ) and the rising portion  5116  (or the rising portion  5216 ) or a portion near the second bent portion  5112  (or the second bent portion  5212 ) and that guides the posture of the pin terminal  5  are on a surface of the lid  4  that faces the interior space  30 . With the structure described above, good reliability can be obtained. 
     In the structure described above, the first fixing portion  111  (or the second fixing portion  121 ) can be configured to direct at least orientation of the contact portion  5113  (or the contact portion  5213 ) of the pin terminal  5  in a plan view of the second top wall main surface  412  of the lid  4 . With the structure described above, misalignment of the orientation of the contact portion of the pin terminal in a plan view of the main surface of the lid is inhibited, and the reliability of connection regarding the contact portion is improved. 
     In the structure described above, the first guide portion  112  (or the second guide portion  122 ) can be configured to direct at least orientation of  5113  (or the contact portion  5213 ) of the pin terminal  5  in the direction intersecting the second top wall main surface  412  of the lid  4 . With the structure described above, misalignment of the orientation of the contact portion of the pin terminal in the direction intersecting the main surface of the lid is inhibited, and the reliability of connection regarding the contact portion is improved. 
     In the structure described above, the first fixing portion  111  (or the second fixing portion  121 ) and the first guide portion  112  (or the second guide portion  122 ) can be disposed at different positions in a plan view of the second top wall main surface  412  of the lid  4 . With the structure described above, misalignment of the pin terminal is inhibited by fixation and support at the different positions. 
     In the structure described above, the first guide portion  112  (or the second guide portion  122 ) can be disposed at a position nearer than the first fixing portion  111  (or the second fixing portion  121 ) to the circumferential edge of the second top wall main surface  412  of the lid  4 . With the structure described above, the reliability of connection regarding the contact portion can be improved by support at a position at which misalignment of the orientation of the contact portion of the pin terminal in the direction intersecting the main surface of the lid is likely to occur. 
     In the structure described above, the lid  4  can have the through-hole  413  in which the pin terminal  5  is inserted, and the first fixing portion  111  (or the second fixing portion  121 ) can be disposed around the opening of the through-hole  413  of the lid  4 . With the structure described above, misalignment of the orientation of the contact portion of the pin terminal in a plan view of the main surface of the lid is inhibited with certainty. 
     In the structure described above, the first fixing portion  111  (or the second fixing portion  121 ) can have the gap  113  (or the gap  123 ) that is an example of a fixing portion gap for inserting the pin terminal  5 , and the first guide portion  112  (or the second guide portion  122 ) can be disposed at a position away from a line on which the gap  113  (or the gap  123 ) extends in a plan view of the second top wall main surface  412  of the lid  4 . With the structure described above, the reliability of contact is improved by fixation and support at different positions. 
     In the structure described above, the first guide portion  112  (or the second guide portion  122 ) can have the gap  114  (or the gap  124 ) that is an example of a guide portion gap for inserting the pin terminal  5 , and a line on which the gap  114  (or the gap  124 ) extends can intersect the line on which the gap  113  (or the gap  123 ) extends in a plan view of the second top wall main surface  412  of the lid  4 . With the structure described above, misalignment of the pin terminal is inhibited with certainty, and good reliability is obtained. 
     In the structure described above, the second bent portion  5112  (or the second bent portion  5212 ) or the portion near the second bent portion  5112  (or the second bent portion  5212 ) can be disposed so as to be crimped or supported by the first guide portion  112  (or the second guide portion  122 ). With the structure described above, misalignment of the orientation of the contact portion of the pin terminal in the direction intersecting the main surface of the lid is inhibited, and the reliability of connection regarding the contact portion is improved. 
     [Modification] 
     It is noted that the exemplary embodiments of the present invention are not limited to the embodiments described above, but can be modified in various ways for application. A modification according to the present invention will now be described. 
     In the description according to the embodiments described above, the fixation guide structure  100  protrudes from the second top wall main surface  412  of the lid  4 , but is not limited by the structure described above. For example, in an alternative aspect, the fixation guide structure  100  can protrude from the first top wall main surface  411  of the lid  4 . 
     In the description according to the embodiments described above, the number of the first fixing portion  111  and the number of the second fixing portion  121  are 1, but are not limited by the structure described above. For example, the number of the first fixing portion  111  and the number of the second fixing portion  121  may be 2 or more in alternative aspects. Similarly, in the description according to the embodiments described above, the number of the first guide portion  112  and the number of the second guide portion  122  are 0 or 1, but are not limited by the structure described above. For example, the number of the first guide portion  112  and the number of the second guide portion  122  can be 2 or more. For example, the number of the first fixing portion  111 , the number of the second fixing portion  121 , the number of the first guide portion  112 , and the number of the second guide portion  122  may differ depending on the shapes of the pin terminals  5 . 
     In the description according to the embodiments described above, the first fixing portion  111  and the first guide portion  112  are isolated from each other, but are not limited by the structure described above. For example, in an alternative aspect, the first fixing portion  111  and the first guide portion  112  may have an integrated structure. Similarly, in the description according to the embodiments described above, the second fixing portion  121  and the second guide portion  122  are isolated from each other but are not limited by the structure described above. For example, the second fixing portion  121  and the second guide portion  122  can have an integrated structure. 
     In the description according to the embodiments described above, the number of the pin terminals  5  is 2, but is not limited by the structure described above. For example, the number may be a numeral other than 2. In the description according to the embodiments described above, the first pin terminal  51  and the second pin terminal  52  have different structures but are not limited by the structures described above. For example, the first pin terminal  51  and the second pin terminal  52  may have the same structure in an alternative aspect. For example, the first pin terminal  51  and the second pin terminal  52  may have structures that differ from the structures described above. 
     In the description according to the embodiments described above, the diaphragm  2  includes the second electrode  22 , but is not limited by the structure described above. For example, the substrate  10  can be used as a component that has the function of the second electrode  22  instead of the second electrode  22 . 
     In the description according to the embodiments described above, the shape of each component of the piezoelectric sounding component  1  in a plan view is a circular shape, but is not limited by the structure described above. For example, a freely selected shape such as a rectangular shape or a square shape may be used in alternative aspects. 
     The exemplary embodiments are described above to make the present invention easy to understand and do not limit the present invention. The present invention can be modified and altered without departing from the spirit thereof. The present invention includes equivalents. That is, embodiments obtained by appropriately modifying the embodiments by a person skilled in the art are included in the scope of the present invention, provided that the embodiments have the features of the present invention. For example, the components according to the embodiments, the arrangement thereof, the material, conditions, shape, and size are not limited to those described above by way of example and can be appropriately changed. It goes without saying that the embodiments are described by way of example, and that the components according to the different embodiments can be partially replaced or combined. These having the features of the present invention are also included in the scope of the present invention. 
     REFERENCE SIGNS LIST 
       1  . . . piezoelectric sounding component,  2  . . . diaphragm,  3  . . . case body,  4  . . . lid,  5  . . . pin terminal,  6  . . . case,  10  . . . substrate,  20  . . . vibration element,  21  . . . first electrode,  22  . . . second electrode,  23  . . . piezoelectric plate,  51  . . . first pin terminal,  52  . . . second pin terminal,  100  . . . fixation guide structure,  110  . . . first fixation guide structure,  111  . . . first fixing portion,  112  . . . first guide portion, structure,  120  . . . second fixation guide structure,  121  . . . second fixing portion,  122  . . . second guide portion