WO2009098934A1 - Piezoelectric transformer device - Google Patents

Piezoelectric transformer device Download PDF

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Publication number
WO2009098934A1
WO2009098934A1 PCT/JP2009/050731 JP2009050731W WO2009098934A1 WO 2009098934 A1 WO2009098934 A1 WO 2009098934A1 JP 2009050731 W JP2009050731 W JP 2009050731W WO 2009098934 A1 WO2009098934 A1 WO 2009098934A1
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Prior art keywords
piezoelectric transformer
piezoelectric
case body
mounting
terminal
Prior art date
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PCT/JP2009/050731
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French (fr)
Japanese (ja)
Inventor
Akio Machida
Ikuo Nakagawa
Yasuhide Matsuo
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Tamura Corporation
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Application filed by Tamura Corporation filed Critical Tamura Corporation
Priority to JP2009552427A priority Critical patent/JP5474572B2/en
Publication of WO2009098934A1 publication Critical patent/WO2009098934A1/en

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/40—Piezoelectric or electrostrictive devices with electrical input and electrical output, e.g. functioning as transformers

Definitions

  • the present invention relates to a piezoelectric transformer device used, for example, in a power supply circuit of electronic equipment, and more particularly to a piezoelectric transformer device that performs transformation using a plurality of piezoelectric transformers.
  • the above-mentioned prior art provides an excellent structure as a piezoelectric transformer device suitable for increasing the density of mounted parts and reducing the size of electronic equipment, and its technical value is still high.
  • the inventors of the present invention conducted extensive research to further improve the prior art. Specifically, the inventors, in the structure of the prior art, house the lower piezoelectric transformer in the upper case, so the upper case dimensions are set slightly longer than the lower case. , I paid attention to the fact that the mounting area has been slightly expanded.
  • One of the objects of the present invention is to further reduce the mounting area and improve productivity.
  • the inventors of the present invention for at least two piezoelectric transformers mounted in two upper and lower stages, have the second and subsequent stages within the mounting area (in the mounting area) occupied by the lower piezoelectric transformer in the circuit board.
  • the above purpose was achieved by housing a piezoelectric transformer.
  • the first piezoelectric transformer mounted on the circuit board in a state where the first piezoelectric body is accommodated in the first case body, and the second piezoelectric body is mounted on the second case body.
  • the mounting area projected on the circuit board is accommodated in the circuit board of the first piezoelectric transformer in a state of being housed and mounted on the circuit board via the first piezoelectric transformer in a state of being stacked above the first piezoelectric transformer.
  • a piezoelectric transformer device including a second piezoelectric transformer within a mounting area.
  • the mounting area of the second piezoelectric transformer mounted in the second and subsequent stages or The mounting area does not become larger than the mounting area or mounting area of the first piezoelectric transformer. That is, the mounting area of the piezoelectric transformer can be accommodated in one piece. Therefore, the mounting area of the entire piezoelectric transformer in the piezoelectric transformer device is always minimized, and mounting of the piezoelectric transformer with a higher density is realized.
  • the first and second case bodies have a predetermined shape common to each other.
  • the mounting area or mounting area projected on the circuit board occupies the circuit board of the first piezoelectric transformer in the second piezoelectric transformer. It overlaps in a state that matches the mounting area or mounting area.
  • the shape of the case body is shared by all the piezoelectric transformers, when the case bodies are aligned and stacked, the mounting area on the circuit board is larger than the case body by any number of layers. Will not expand.
  • the piezoelectric transformer is laminated in the third and subsequent stages.
  • the electrical connection of the plurality of piezoelectric transformers is performed by the following configuration. That is, the first and second case bodies each have a protruding portion that is formed to protrude from the side surface.
  • the first piezoelectric transformer has a first conductive member that extends through the protruding portion of the first case body in the vertical direction. The lower end portion of the first conductive member is formed as a first mounting terminal connected to the wiring pattern of the circuit board. The upper end portion of the first conductive member is bent along the upper surface of the protruding portion, and is formed as a first connection terminal connected to the second piezoelectric transformer.
  • the second piezoelectric transformer has a second conductive member extending vertically through the protruding portion of the second case body.
  • the lower end portion of the second conductive member is formed as a second mounting terminal that is bent along the lower surface of the projecting portion and connected to the connection terminal of the first piezoelectric transformer.
  • the first connection terminal and the second mounting terminal are bent along the corresponding upper and lower surfaces, respectively. For this reason, when the second piezoelectric transformer is mounted on the first piezoelectric transformer, the first connection terminal and the second mounting terminal overlap in parallel in substantially the same plane. As a result, the first connecting terminal and the second mounting terminal can be easily joined to each other, for example, a soldering operation or a thermosetting conductive paste application operation.
  • the first connection terminal and the second mounting terminal are provided apart from the respective side surfaces of the first and second case bodies, so that the first connection terminal and the second mounting terminal are provided between them. It may be a form in which the space is secured.
  • the first piezoelectric transformer is provided on the upper portion of the first case body, and has a guide portion for positioning the second case body with respect to the first case body in a state where the second piezoelectric transformer is loaded. It may be.
  • the seating of the second piezoelectric transformer is stabilized during the assembly work of the piezoelectric transformer device, and the joining workability between the first connection terminal and the second mounting terminal is further improved.
  • the above-described guide portion has a form protruding upward from the upper surface of the first case body.
  • the projecting portion is a form projecting downward from at least the lower surface of the second case body.
  • the second case body is positioned with respect to the first case body by guiding the projecting portion to the guide portion in a state where the second piezoelectric transformer is loaded on the first piezoelectric transformer. .
  • the guide case positions the second case body while hooking the protruding portion.
  • the guide portion continues to contact the protruding portion after positioning, the second piezoelectric transformer is not displaced during the joining operation of the first connection terminal and the second mounting terminal, and the workability is further improved. Will improve.
  • the projecting portion and the conductive member are provided at four locations on each of the first and second case bodies.
  • the first mounting terminal and the first connection terminal are two primary electrodes of the piezoelectric body in two of the four protruding portions formed on the first case body. Connected to each. In the other two of the four protruding portions, one first mounting terminal and the first connection terminal are connected to the secondary electrode of the piezoelectric body, and the other first mounting terminal and The first connection terminal is not connected to the piezoelectric body.
  • the second mounting terminals are respectively connected to the two primary electrodes of the piezoelectric body at two of the four protruding portions formed on the second case body. . At the other two locations out of the four protruding portions, one second mounting terminal is not in contact with the piezoelectric body, and the other second mounting terminal is connected to the secondary electrode of the piezoelectric body. Has been.
  • the other second mounting terminal connected to the secondary electrode of the piezoelectric body of the second piezoelectric transformer is the first piezoelectric transformer.
  • the piezoelectric transformer is joined to the other first connection terminal that is not connected to the piezoelectric body.
  • the second mounting terminal which is not connected to the secondary electrode of the piezoelectric body for the second piezoelectric transformer, is connected to the secondary electrode of the piezoelectric body for the first piezoelectric transformer. It is joined to the first connection terminal.
  • the upper piezoelectric transformer has an arm-shaped terminal support portion formed on the side surface of the case body, and a secondary terminal is disposed below it, and is mounted directly on the circuit board using this. Structure is adopted.
  • the structure of the case body is different between the upper piezoelectric transformer and the lower piezoelectric transformer, and it is necessary to individually mount the piezoelectric transformer on the circuit board for the lower side and the upper side, It takes a lot of work.
  • the shape of the case body is made common by a plurality of piezoelectric transformers, and the second piezoelectric transformer is basically not directly mounted on the circuit board.
  • a structure is adopted in which these terminals are bonded and mounted to the terminals of the first piezoelectric transformer.
  • the terminals used are only the terminals of the first piezoelectric transformer, so that the number of work steps is reduced accordingly.
  • the structure of the entire piezoelectric transformer device is strengthened, and stability during mounting work can be improved. it can.
  • first and second case bodies have instruction means for instructing each other's assembly direction at a position that can be viewed from the outside.
  • the piezoelectric body has a primary side electrode and a secondary side electrode, and it is necessary to assemble two piezoelectric transformers after properly aligning the positions of the primary side electrode and the secondary side electrode.
  • the piezoelectric body is structured to be accommodated in the case body, it is difficult to immediately know in which direction the primary side electrode and the secondary side electrode are located from the appearance during assembly work.
  • the case body is provided with instruction means that can be visually recognized from the outside.
  • instruction means that can be visually recognized from the outside.
  • the piezoelectric transformer device minimizes the mounting area on the circuit board and enables higher-density mounting even when a plurality of piezoelectric transformers are used.
  • the piezoelectric transformer device of the present invention workability when assembling a plurality of piezoelectric transformers is improved, and the production efficiency of the piezoelectric transformer device is greatly improved.
  • FIG. 1 is a side view showing the structure of a piezoelectric transformer device according to an embodiment.
  • FIG. 2 is a side view (on the opposite side to FIG. 1) showing the structure of the piezoelectric transformer device.
  • the piezoelectric transformer device of the present embodiment has a structure in which an upper piezoelectric transformer 200 is stacked on a lower piezoelectric transformer 100. These two piezoelectric transformers 100 and 200 are structurally and electrically connected to each other, and are mounted on a circuit board (not shown) with the lower piezoelectric transformer 100 facing each other.
  • the lower and upper piezoelectric transformers 100 and 200 each have a basic structure in which a long or flat piezoelectric ceramic 12 is accommodated in a resin case body 14. In order to suppress the mounting height as a whole, the piezoelectric ceramics 12 are accommodated in a flat state, and the thickness direction of the piezoelectric ceramics 12 coincides with the vertical direction.
  • primary side electrodes 12a are formed on the upper and lower surfaces in the state shown in FIGS.
  • a secondary electrode 12b is formed at one end opposite to the primary electrode 12a.
  • a portion where the primary side electrode 12a is formed functions as a drive unit, and a portion where the primary side electrode 12a is not formed functions as a power generation unit.
  • the case body 14 having a common shape is used for the lower and upper piezoelectric transformers 100 and 200.
  • Each case body 14 has an outer shape larger than that of the piezoelectric ceramic 12, and a concave accommodating portion 14c is formed therein.
  • the lower surface of the case body 14 is opened, and the accommodating portion 14 c extends from the opening toward the inside of the case body 14.
  • the accommodating part 14c can accommodate the piezoelectric ceramics 12 in a flat position as shown in the figure, and the accommodating part 14c has a shape or volume that is slightly larger than that of the piezoelectric ceramics 12.
  • the piezoelectric ceramic 12 is bonded by, for example, a silicone adhesive (not shown) while being accommodated in the case body 14, that is, the accommodating portion 14c. For this reason, the piezoelectric ceramic 12 can freely vibrate inside the case body 14 during driving, and the vibration is absorbed by the silicone adhesive.
  • the case body 14 is integrally formed with block-shaped protrusions 14a at two places on each side surface, for a total of four places. These protrusions 14a protrude from the side surfaces of the case body 14 to the side with a certain thickness. Further, the protruding portion 14 a protrudes slightly downward from the opening on the lower surface of the case body 14. In addition, in the example of illustration, although the four protrusion parts 14a are shown as the same shape, the shape of the protrusion part 14a may differ for every place.
  • Conductive members 18, 18, 20, and 22 are inserted through the protrusions 14a, respectively.
  • Each protrusion 14a is formed with an insertion hole 14b for the conductive members 18, 18, 20, and 22.
  • the insertion hole 14b extends through the inside of each protrusion 14a in the vertical direction.
  • Each of the conductive members 18, 18, 20, and 22 is, for example, a metal rod, so-called lead pin.
  • the cross section has a square shape, but the conductive members 18, 18, 20, and 22 may have a flat plate shape or a round bar shape.
  • the forms of the conductive members 18, 18, 20, and 22 are different between the lower piezoelectric transformer 100 and the upper piezoelectric transformer 200. Hereinafter, this point will be described.
  • the conductive members 18, 18, 20, and 22 are inserted into the insertion holes 14b of the protrusions 14a in a state of being bent in an inverted L shape.
  • the lower ends of the conductive members 18, 18, 20, and 22 protrude downward from the protrusions 14a, and these lower ends are formed as mounting terminals 18a, 18a, 20a, and 22a, respectively.
  • the piezoelectric transformer device as a whole is mounted, for example, inserted and mounted on a circuit board (not shown) using these mounting terminals 18a, 18a, 20a, and 22a.
  • the piezoelectric transformer device may be surface-mounted on the circuit board with the mounting terminals 18a, 18a, 20a, and 22a bent.
  • connection terminal On the other hand, the upper end portions of the conductive members 18, 18, 20, and 22 are bent in the horizontal direction along the upper surface of the case body 14 at the upper surface of each protruding portion 14a. Each upper end extends in the direction toward both outer sides. These upper end portions are respectively formed as connection terminals 18b, 18b, 20b, and 22b, and the upper piezoelectric transformer 200 is connected to the lower piezoelectric transformer 100 via these connection terminals 18b, 18b, 20b, and 22b.
  • the conductive members 18 are connected to the two primary side electrodes 12a of the piezoelectric ceramic 12 respectively.
  • the conductive members 18, 18 are provided in pairs on both sides at a position near one end on the left side of the case body 14 in FIG. 1 and near one end on the right side in FIG.
  • a conductive wire 16, for example, a gold thread wire is soldered to each primary side electrode 12 a in the housing portion 14 c of the case body 14.
  • the conductive wires 16, 16 are drawn out one by one from the housing portion 14c to the outer sides of the case body 14, and are soldered in a state of being entangled with the connection terminals 18b, 18b on both sides.
  • the conductive wire 16 may be soldered to the mounting terminal 18a.
  • the conductive members 20 and 22 are provided in pairs on both sides at positions close to the conductive members 18 and 18 when viewed in the longitudinal direction of the case body 14.
  • the conductive wire 16 is also soldered to the secondary electrode 12b of the piezoelectric ceramic 12, but there is only one secondary electrode 12b. For this reason, the conductive wire 16 is soldered to only one conductive member 20.
  • the conductive wire 16 is drawn from the housing portion 14c to one outer side of the case body 14 and soldered in a state of being entangled with the connection terminal 20b (see FIG. 2). .
  • the other conductive member 22 is not electrically connected to the piezoelectric ceramic 12 with respect to the lower piezoelectric transformer 100 and is a so-called empty terminal.
  • the conductive member 22 is electrically connected to the secondary electrode 12 b of the piezoelectric ceramic 12. The connection relationship of the conductive member 22 will be further described later.
  • the conductive members 18, 18, 20, and 22 are bent into a substantially C shape as a whole in a state where the conductive members 18, 18, 20, and 22 are inserted into the insertion holes 14b of the protrusions 14a. That is, the upper ends of the conductive members 18, 18, 20, and 22 are along the upper surface of the case body 14 above the protrusions 14a, and the lower ends of the conductive members 18, 18, 20, and 22 are The conductive members 18, 18, 20, and 22 are bent along the lower surface of the case body 14 below the protruding portion 14a. In the example shown in the drawing, each upper end and lower end extend toward both outer sides in the longitudinal direction of the case body 14.
  • FIG. 3 is a bottom view showing the upper piezoelectric transformer 200 alone.
  • FIG. 4 is a plan view showing the upper piezoelectric transformer 200 alone.
  • description will be made with reference to FIGS. 3 and 4 in addition to FIGS. 1 and 2.
  • the lower ends of the conductive members 18, 18, 20, and 22 are formed as mounting terminals 18c, 18c, 20c, and 22c, respectively. As shown in FIGS. 1 and 2, the upper piezoelectric transformer 200 connects these mounting terminals 18c, 18c, 20c, and 22c to the lower connection terminals 18b, 18b, 22b, and 20b, respectively. It is mounted on the circuit board via the lower piezoelectric transformer 100.
  • the upper end portions 18d, 18d, 20d, and 22d of the conductive members 18, 18, 20, and 22 are not particularly used as connection terminals, but are not illustrated.
  • the upper end portions 18d, 18d, 20d, and 22d are used as connection terminals.
  • the difference between the conductive members 18, 18, 20, and 22 is the same as that of the lower piezoelectric transformer 100. That is, the conductive members 18, 18 are provided in pairs on both sides at positions near one end on the left side of the case body 14 in FIGS. 1, 3, and 4, and near one end on the right side in FIG. Yes.
  • the two conductive wires 16 and 16 soldered to the primary side electrode 12a are drawn out one by one from the housing portion 14c to the outer sides of the case body 14, and entangled with the upper end portions 18d and 18d on both sides, respectively. Soldered in a state.
  • the conductive wire 16 may be soldered to the mounting terminal 18c.
  • the conductive members 20 and 22 are provided in pairs on both sides at positions close to the conductive member 18 when viewed in the longitudinal direction of the case body 14.
  • the conductive wire 16 soldered to the secondary electrode 12 b is soldered in a state of being entangled with the upper end portion 20 d of one conductive member 20.
  • the conductive wire 16 may be soldered to the mounting terminal 20c.
  • the other conductive member 22 is not electrically connected to the piezoelectric ceramic 12 and is a so-called empty terminal.
  • the arrangement of the conductive members 20 and 22 is reversed on both side surfaces. That is, when the two piezoelectric transformers 100 and 200 are vertically stacked, the upper conductive member 22 is positioned on the lower conductive member 20 on one side surface of the case body 14, and the lower conductive member 22 is positioned on the other side surface.
  • the upper conductive member 20 is located on the upper side.
  • FIG. 5 is a front view of the entire piezoelectric transformer device.
  • the secondary electrode 12b is set to the front direction.
  • FIG. 5 will be added to FIGS.
  • Each case body 14 is integrally formed with projection-like guide portions 14d at four locations on the upper surface thereof in advance.
  • the guide portion 14d is positioned flush with each side surface of the case body 14 above each projection portion 14a, for example, and projects upward from the upper surface of the case body 14 to a certain height.
  • the length of the guide portion 14d is equal to the width of the protruding portion 14a in the longitudinal direction of the case body 14, but is not particularly limited thereto.
  • each protrusion 14a protrudes downward from the lower surface of the case body 14 by a certain length. For this reason, as shown in FIGS. 1, 2 and 5, when the upper piezoelectric transformer 200 is loaded on the lower piezoelectric transformer 100, the lower end portion of the upper protruding portion 14a becomes the lower guide portion 14d. Guided along the side surface, the case bodies 14 are positioned relative to each other. At this time, the connection terminals 18b, 18b, 20b, and 22b and the mounting terminals 18c, 18c, 22c, and 20c overlap each other.
  • the upper piezoelectric transformer 200 When the upper piezoelectric transformer 200 is loaded on the lower piezoelectric transformer 100 as described above, the lower end portion of the projecting portion 14a is in contact with each guide portion 14d, and the upper piezoelectric transformer 200 can be stably seated as it is. It can be made. Thereby, joining operation
  • the conductive members 18, 18, 20, and 22 are provided at positions spaced apart from the both side surfaces of the case body 14 by a certain distance.
  • the lower piezoelectric transformer 100 As described above, a space for joining work is secured between the both side surfaces of the case body 14 and the connection terminals 18b, 18b, 20b, and 22b and the mounting terminals 18c, 18c, 22c, and 20c.
  • the secondary electrode 12b is connected to the lower connecting terminal 22b through the mounting terminal 20c on the left side in FIG.
  • the mounting terminal 20c is connected to the circuit board via the mounting terminal 22a which has been an empty terminal in the lower stage.
  • the marker part 14e is integrally formed in the case body 14, for example in the end surface seen in the longitudinal direction.
  • the marker part 14e is a mark for aligning the directions of the piezoelectric transformers 100 and 200 when assembled. Since the marker portion 14e is formed so as to protrude at a position where it can be easily visually recognized from the outside, for example, the assembling operator may assemble the upper and lower piezoelectric transformers 100 and 200 while aligning the orientation of the marker portion 14e. Thereby, a simple operation mistake, for example, a mistake such as joining the primary side electrode 12a and the secondary side electrode 12b is reliably prevented.
  • the piezoelectric transformer device has the following advantages because the plurality of piezoelectric transformers 100 and 200 have the same shape of the case body 14.
  • the piezoelectric transformer device is configured by stacking the piezoelectric transformers 100 and 200 in a plurality of stages, the mounting area does not increase to one or more as a whole. For this reason, the piezoelectric transformers 100 and 200 are mounted on the circuit board at a higher density.
  • the structural improvement of the case body 14, for example, the projecting portion 14 a and the work space improves the assembly work of the piezoelectric transformers 100 and 200 and the soldering workability, and greatly improves the production efficiency of the piezoelectric transformer device.
  • the shape of the piezoelectric ceramic 12 is not limited to the illustrated shape, and may be other shapes.
  • the shape of the case body 14 can be appropriately modified in accordance with the outer shape of the piezoelectric ceramic 12.
  • the case body 14 having a common shape is used in the upper and lower piezoelectric transformers 100 and 200, but case bodies having different shapes may be used.
  • the case body 14 having the same shape as that of the embodiment is used for the lower piezoelectric transformer 100, and the mounting area or mounting area when the upper piezoelectric transformer 200 is projected onto the circuit board rather than the case body 14 is larger. Smaller ones may be used. Even in this case, the mounting area of the piezoelectric transformer device in the circuit board is minimized by accommodating the upper piezoelectric transformer 200 within the mounting area or mounting area of the lower piezoelectric transformer 100.
  • the piezoelectric transformers 100 and 200 are stacked in two upper and lower stages, but the piezoelectric transformer device may have three or more stages of piezoelectric transformers.
  • the upper and lower piezoelectric transformers 100 and 200 insulate the secondary side electrodes 12b from each other, but they may be connected.
  • the marker portion 14e is exemplified as a protrusion shape, but may be a depression shape.
  • the means for instructing the direction may be a marking applied to the outer surface of the case body 14 by printing or laser printing.
  • the structure given with illustration in the embodiment is only a preferable example, and it can be said that the present invention can be suitably implemented even if various elements are added to the basic structure or a part thereof is replaced. Not too long.
  • Piezoelectric ceramics (piezoelectric material) 12a Primary side electrode 12b Secondary side electrode 14 Case body 14a Projection part 14c Storage part 14d Guide part 14e Marker part (instruction means) 16 Conductive wires 18, 20, 22 Conductive members 18a, 20a, 22a Mounting terminals 18b, 20b, 22b Connecting terminals 18c, 20c, 22c Mounting terminals 100, 200 Piezoelectric transformer

Abstract

Provided is a piezoelectric transformer device having a structure, in which an upper piezoelectric transformer (200) is stacked on a lower piezoelectric transformer (100). This lower piezoelectric transformer (100) is so mounted on a circuit board that a piezoelectric ceramics (12) is housed in a case body (14). The upper piezoelectric transformer (200) is so mounted in the circuit board through the lower piezoelectric transformer (100) that the piezoelectric ceramics (12) is housed in the case body (14). The projected area of the upper piezoelectric transformer (200) on the circuit board is within the range of the mounted area of the lower piezoelectric transformer (100) in the circuit board.

Description

圧電トランス装置Piezoelectric transformer device
　本発明は、例えば電子機器類の電源回路に用いられる圧電トランス装置に係り、特に複数個の圧電トランスを用いて変圧を行う圧電トランス装置に関するものである。 The present invention relates to a piezoelectric transformer device used, for example, in a power supply circuit of electronic equipment, and more particularly to a piezoelectric transformer device that performs transformation using a plurality of piezoelectric transformers.
　この種の圧電トランス装置に関する先行技術として、例えば特開２００７－１６５３４２号公報の図３及び図４には、複数個の圧電トランスが上下に重ねて実装され、全体として実装面積が小さくされたものが開示されている。この先行技術によれば、複数個の圧電セラミックスが、各々のケース内に組み込まれた状態で積み重ねられ、一体化した状態で基板に実装される。従って、この先行技術によれば、横方向に圧電セラミックスを並べた構造と比較して、圧電トランスの実装面積が一つ分で済み、それだけ省スペース化を図ることができる。 As prior art relating to this type of piezoelectric transformer device, for example, in FIGS. 3 and 4 of Japanese Patent Application Laid-Open No. 2007-165342, a plurality of piezoelectric transformers are mounted one above the other to reduce the mounting area as a whole. Is disclosed. According to this prior art, a plurality of piezoelectric ceramics are stacked in a state of being incorporated in each case and mounted on the substrate in an integrated state. Therefore, according to this prior art, as compared with the structure in which the piezoelectric ceramics are arranged in the lateral direction, only one mounting area of the piezoelectric transformer is required, so that the space can be saved.
　上述した先行技術は、実装部品の高密度化や電子機器の小型化に適した圧電トランス装置として優れた構造を提供したものであり、その技術的価値は依然として高いものである。その上で、本発明の発明者等は、先行技術を更に改良すべく、鋭意研究を重ねた。具体的には、発明者等は、先行技術の構造では上側のケース内に下側の圧電トランスが収納されているため、上側のケースの寸法が下側のケースよりも若干長く設定されており、それだけ実装面積が僅かに拡大されている点に着目し、研究を重ねた。 The above-mentioned prior art provides an excellent structure as a piezoelectric transformer device suitable for increasing the density of mounted parts and reducing the size of electronic equipment, and its technical value is still high. On top of that, the inventors of the present invention conducted extensive research to further improve the prior art. Specifically, the inventors, in the structure of the prior art, house the lower piezoelectric transformer in the upper case, so the upper case dimensions are set slightly longer than the lower case. , I paid attention to the fact that the mounting area has been slightly expanded.
　本発明の目的の一つは、より一層の実装面積の低減や、生産性の改善である。
　本発明の発明者等は、少なくとも上下２段に重ねて実装される２つの圧電トランスについて、回路基板内で下段の圧電トランスが占める実装面積の範囲内（実装領域内）に２段目以降の圧電トランスを収めることで上記の目的を達成した。 One of the objects of the present invention is to further reduce the mounting area and improve productivity.
The inventors of the present invention, for at least two piezoelectric transformers mounted in two upper and lower stages, have the second and subsequent stages within the mounting area (in the mounting area) occupied by the lower piezoelectric transformer in the circuit board. The above purpose was achieved by housing a piezoelectric transformer.
　本発明の一態様によれば、第１のケース体に第１の圧電体を収容した状態で回路基板に実装される第１の圧電トランスと、第２のケース体に第２の圧電体を収容し、かつ第１の圧電トランスの上方に積載した状態で第１の圧電トランスを介して回路基板に実装され、回路基板上に投影した実装面積が第１の圧電トランスの回路基板内に占める実装面積の範囲内である第２の圧電トランスとを備えた圧電トランス装置が提供される。 According to an aspect of the present invention, the first piezoelectric transformer mounted on the circuit board in a state where the first piezoelectric body is accommodated in the first case body, and the second piezoelectric body is mounted on the second case body. The mounting area projected on the circuit board is accommodated in the circuit board of the first piezoelectric transformer in a state of being housed and mounted on the circuit board via the first piezoelectric transformer in a state of being stacked above the first piezoelectric transformer. There is provided a piezoelectric transformer device including a second piezoelectric transformer within a mounting area.
　本発明の一態様の圧電トランス装置では、複数の、例えば２個以上の圧電トランスを積層して実装する構造であっても、２段目以降に積載される第２の圧電トランスの実装面積又は実装領域が、第１の圧電トランスの実装面積又は実装領域よりも大きくなることがない。つまり、圧電トランスの実装面積が１個分に収められる。したがって、圧電トランス装置における圧電トランス全体の実装面積が常に最小化され、それだけ高密度な圧電トランスの実装が実現される。 In the piezoelectric transformer device according to one aspect of the present invention, even in a structure in which a plurality of, for example, two or more piezoelectric transformers are stacked and mounted, the mounting area of the second piezoelectric transformer mounted in the second and subsequent stages or The mounting area does not become larger than the mounting area or mounting area of the first piezoelectric transformer. That is, the mounting area of the piezoelectric transformer can be accommodated in one piece. Therefore, the mounting area of the entire piezoelectric transformer in the piezoelectric transformer device is always minimized, and mounting of the piezoelectric transformer with a higher density is realized.
　好ましくは、第１及び第２のケース体は、互いに共通の所定形状を有する。この場合、複数の圧電トランスでケース体の形状を共通化しているため、第２の圧電トランスは、回路基板上に投影した実装面積又は実装領域が、第１の圧電トランスの回路基板内に占める実装面積又は実装領域に合致した状態で重なり合う。
　また、全ての圧電トランスについてケース体の形状が共通化されるため、ケース体の位置を合わせて積層した場合、何段に重ねても回路基板上での実装面積がケース体の１個分よりも拡大することはない。これは、圧電トランスを３段目以降に積層する場合についても同様である。
　更に、複数の圧電トランスでケース体を個別の形状とする必要がなく、部品の共通化が可能であるため、個別にケース体を設計・製造する場合に比較して製造コストを低減することができる。 Preferably, the first and second case bodies have a predetermined shape common to each other. In this case, since the shape of the case body is shared by a plurality of piezoelectric transformers, the mounting area or mounting area projected on the circuit board occupies the circuit board of the first piezoelectric transformer in the second piezoelectric transformer. It overlaps in a state that matches the mounting area or mounting area.
In addition, since the shape of the case body is shared by all the piezoelectric transformers, when the case bodies are aligned and stacked, the mounting area on the circuit board is larger than the case body by any number of layers. Will not expand. The same applies to the case where the piezoelectric transformer is laminated in the third and subsequent stages.
Furthermore, it is not necessary to make the case body into individual shapes with a plurality of piezoelectric transformers, and it is possible to share parts, so that the manufacturing cost can be reduced compared to the case where the case body is individually designed and manufactured. it can.
　本発明において、好ましくは、複数の圧電トランスの電気的な接続は以下の構成により行われる。すなわち、第１及び第２のケース体は、それぞれ側面から突出して形成された突出部を有する。
　第１の圧電トランスは、第１のケース体の突出部を上下方向に貫通して延びる第１の導電部材を有する。第１の導電部材の下端部は、回路基板の配線パターンに接続される第１の実装用端子として形成される。第１の導電部材の上端部は、突出部の上面に沿って屈曲されて、第２の圧電トランスと接続される第１の接続用端子として形成されている。 In the present invention, preferably, the electrical connection of the plurality of piezoelectric transformers is performed by the following configuration. That is, the first and second case bodies each have a protruding portion that is formed to protrude from the side surface.
The first piezoelectric transformer has a first conductive member that extends through the protruding portion of the first case body in the vertical direction. The lower end portion of the first conductive member is formed as a first mounting terminal connected to the wiring pattern of the circuit board. The upper end portion of the first conductive member is bent along the upper surface of the protruding portion, and is formed as a first connection terminal connected to the second piezoelectric transformer.
　第２の圧電トランスは、第２のケース体の突出部を上下方向に貫通して延びる第２の導電部材を有する。第２の導電部材の下端部は、突出部の下面に沿って屈曲されて第１の圧電トランスの接続用端子と接続される第２の実装用端子として形成されている。第１の圧電トランス上に第２の圧電トランスを積載した状態で、第２の実装用端子と第１の接続用端子とは相互に接合される。 The second piezoelectric transformer has a second conductive member extending vertically through the protruding portion of the second case body. The lower end portion of the second conductive member is formed as a second mounting terminal that is bent along the lower surface of the projecting portion and connected to the connection terminal of the first piezoelectric transformer. In a state where the second piezoelectric transformer is mounted on the first piezoelectric transformer, the second mounting terminal and the first connection terminal are bonded to each other.
　上記のように、第１の圧電トランスと第２の圧電トランスとの間では、第１の接続用端子及び第２の実装用端子が、対応する上面及び下面に沿ってそれぞれ屈曲されている。このため、第１の圧電トランス上に第２の圧電トランスを積載すると、第１の接続用端子と第２の実装用端子とが略同一面内で平行に重なり合う。この結果として、第１の接続用端子及び第２の実装用端子の互いの接合作業、例えば半田付け作業や熱硬化型の導電性ペーストの塗布作業等、が容易に行われる。 As described above, between the first piezoelectric transformer and the second piezoelectric transformer, the first connection terminal and the second mounting terminal are bent along the corresponding upper and lower surfaces, respectively. For this reason, when the second piezoelectric transformer is mounted on the first piezoelectric transformer, the first connection terminal and the second mounting terminal overlap in parallel in substantially the same plane. As a result, the first connecting terminal and the second mounting terminal can be easily joined to each other, for example, a soldering operation or a thermosetting conductive paste application operation.
　本発明の一態様では、第１及び第２のケース体の各側面から第１の接続用端子及び第２の実装用端子が離隔して設けられていることにより、これらの間に接合作業用の空間が確保されている形態であってもよい。 In one aspect of the present invention, the first connection terminal and the second mounting terminal are provided apart from the respective side surfaces of the first and second case bodies, so that the first connection terminal and the second mounting terminal are provided between them. It may be a form in which the space is secured.
　これにより、第１の接続用端子と第２の実装用端子との接合作業がよりしやすくなり、圧電トランス装置の生産効率が大きく向上する。 This makes it easier to join the first connection terminal and the second mounting terminal, greatly improving the production efficiency of the piezoelectric transformer device.
　また第１の圧電トランスは、第１のケース体の上部に設けられ、第２の圧電トランスを積載した状態で第２のケース体を第１のケース体に対して位置決めする案内部を有する形態であってもよい。 The first piezoelectric transformer is provided on the upper portion of the first case body, and has a guide portion for positioning the second case body with respect to the first case body in a state where the second piezoelectric transformer is loaded. It may be.
　上記の形態であれば、圧電トランス装置の組み立て作業時に第２の圧電トランスの座りが安定させられ、第１の接続用端子と第２の実装用端子との接合作業性がさらに向上する。 In the above form, the seating of the second piezoelectric transformer is stabilized during the assembly work of the piezoelectric transformer device, and the joining workability between the first connection terminal and the second mounting terminal is further improved.
　より具体的には、上記の案内部は第１のケース体の上面から上方に突出した形態である。また突出部は、少なくとも第２のケース体の下面から下方に突出している形態である。これにより、第２の圧電トランスが第１の圧電トランス上に積載された状態で、突出部が案内部に案内されることで第２のケース体が第１のケース体に対して位置決めされる。 More specifically, the above-described guide portion has a form protruding upward from the upper surface of the first case body. The projecting portion is a form projecting downward from at least the lower surface of the second case body. As a result, the second case body is positioned with respect to the first case body by guiding the projecting portion to the guide portion in a state where the second piezoelectric transformer is loaded on the first piezoelectric transformer. .
　この場合、第１の圧電トランス上に第２の圧電トランスを積載する際、案内部が突出部を引っかけながら第２のケース体を位置決めする。また、位置決めした後も引き続き案内部が突出部に接するので、第１の接続用端子と第２の実装用端子との接合作業時に第２の圧電トランスが位置ずれすることがなく、より作業性が向上する。 In this case, when the second piezoelectric transformer is mounted on the first piezoelectric transformer, the guide case positions the second case body while hooking the protruding portion. In addition, since the guide portion continues to contact the protruding portion after positioning, the second piezoelectric transformer is not displaced during the joining operation of the first connection terminal and the second mounting terminal, and the workability is further improved. Will improve.
　また本発明の一態様において、好ましくは、突出部及び導電部材は、第１及び第２のケース体にそれぞれ４箇所ずつ設けられている。第１の圧電トランスでは、第１のケース体に形成された４箇所の突出部のうち２箇所については、第１の実装用端子及び第１の接続用端子が圧電体の２つの一次側電極にそれぞれ接続される。４箇所の突出部のうちその他の２箇所では、一方の第１の実装用端子及び第１の接続用端子が圧電体の二次側電極に接続され、その他方の第１の実装用端子及び第１の接続用端子が圧電体とは非接続である。 Also, in one aspect of the present invention, preferably, the projecting portion and the conductive member are provided at four locations on each of the first and second case bodies. In the first piezoelectric transformer, the first mounting terminal and the first connection terminal are two primary electrodes of the piezoelectric body in two of the four protruding portions formed on the first case body. Connected to each. In the other two of the four protruding portions, one first mounting terminal and the first connection terminal are connected to the secondary electrode of the piezoelectric body, and the other first mounting terminal and The first connection terminal is not connected to the piezoelectric body.
　また第２の圧電トランスでは、第２のケース体に形成された４箇所の突出部のうち２箇所については、第２の実装用端子が圧電体の２つの一次側電極にそれぞれ接続されている。４箇所の突出部のうちその他の２箇所では、一方の第２の実装用端子が圧電体とは非接触であり、その他方の第２の実装用端子が圧電体の二次側電極に接続されている。 In the second piezoelectric transformer, the second mounting terminals are respectively connected to the two primary electrodes of the piezoelectric body at two of the four protruding portions formed on the second case body. . At the other two locations out of the four protruding portions, one second mounting terminal is not in contact with the piezoelectric body, and the other second mounting terminal is connected to the secondary electrode of the piezoelectric body. Has been.
　このとき第１の圧電トランス上に第２の圧電トランスを積載した状態で、第２の圧電トランスについて圧電体の二次側電極に接続された他方の第２の実装用端子は、第１の圧電トランスについて圧電体とは非接続である他方の第１の接続用端子と接合されている。そして、第２の圧電トランスについて圧電体の二次側電極とは非接続である一方の第２の実装用端子は、第１の圧電トランスについて圧電体の二次側電極に接続された一方の第１の接続用端子と接合されている。 At this time, in a state where the second piezoelectric transformer is mounted on the first piezoelectric transformer, the other second mounting terminal connected to the secondary electrode of the piezoelectric body of the second piezoelectric transformer is the first piezoelectric transformer. The piezoelectric transformer is joined to the other first connection terminal that is not connected to the piezoelectric body. The second mounting terminal, which is not connected to the secondary electrode of the piezoelectric body for the second piezoelectric transformer, is connected to the secondary electrode of the piezoelectric body for the first piezoelectric transformer. It is joined to the first connection terminal.
　本発明の一態様のように、複数の圧電トランスを積載して実装する場合、回路基板上に直接実装されない圧電トランスの電気的な接続をどのようにするかが１つのポイントとなる。先に挙げた先行技術では、上側の圧電トランスについてはケース体の側面にアーム状の端子支持部が形成され、その下部に二次側端子が配置され、これを用いて回路基板に直接実装する構造が採用されている。しかしながら、この場合には、上側の圧電トランスと下側の圧電トランスとでケース体の構造が別々となるし、下側と上側とでそれぞれ圧電トランスを個々に回路基板に実装する必要があり、それだけ作業工数がかかる。 As in one aspect of the present invention, when a plurality of piezoelectric transformers are mounted and mounted, one point is how to electrically connect the piezoelectric transformers that are not directly mounted on the circuit board. In the prior art mentioned above, the upper piezoelectric transformer has an arm-shaped terminal support portion formed on the side surface of the case body, and a secondary terminal is disposed below it, and is mounted directly on the circuit board using this. Structure is adopted. However, in this case, the structure of the case body is different between the upper piezoelectric transformer and the lower piezoelectric transformer, and it is necessary to individually mount the piezoelectric transformer on the circuit board for the lower side and the upper side, It takes a lot of work.
　この点、本発明の好ましい態様では、複数の圧電トランスでケース体の形状を共通化しており、第２の圧電トランスを直接回路基板に実装することは基本的にできないので、第２の圧電トランスの端子を第１の圧電トランスの端子と接合して実装する構造を採用している。これにより、圧電トランス装置全体を回路基板に実装する際、使用する端子は第１の圧電トランスの端子のみであるため、それだけ作業工数が減らされる。また、第１の圧電トランスと第２の圧電トランスとで互いの端子同士を予め接合しておくことにより、圧電トランス装置全体としての構造が強固になり、実装作業時の安定性を高めることができる。 In this respect, in the preferred embodiment of the present invention, the shape of the case body is made common by a plurality of piezoelectric transformers, and the second piezoelectric transformer is basically not directly mounted on the circuit board. A structure is adopted in which these terminals are bonded and mounted to the terminals of the first piezoelectric transformer. As a result, when the entire piezoelectric transformer device is mounted on the circuit board, the terminals used are only the terminals of the first piezoelectric transformer, so that the number of work steps is reduced accordingly. In addition, by joining the terminals of the first piezoelectric transformer and the second piezoelectric transformer in advance, the structure of the entire piezoelectric transformer device is strengthened, and stability during mounting work can be improved. it can.
　また第１及び第２のケース体は、外側から視認可能な位置に互いの組み付け方向を指示する指示手段を有することが好ましい。 Moreover, it is preferable that the first and second case bodies have instruction means for instructing each other's assembly direction at a position that can be viewed from the outside.
　上記のように圧電体には一次側電極と二次側電極とがあり、これら一次側電極及び二次側電極の位置を正しく合わせた上で、２つの圧電トランスを組み付ける必要がある。しかしながら、圧電体はケース体に収容される構造であるため、組み付け作業時に外見からどの方向に一次側電極及び二次側電極がそれぞれ位置しているのかが直ちには分かりづらい。 As described above, the piezoelectric body has a primary side electrode and a secondary side electrode, and it is necessary to assemble two piezoelectric transformers after properly aligning the positions of the primary side electrode and the secondary side electrode. However, since the piezoelectric body is structured to be accommodated in the case body, it is difficult to immediately know in which direction the primary side electrode and the secondary side electrode are located from the appearance during assembly work.
　そこで本発明の好ましい態様では、ケース体に外部から視認可能な指示手段を設けている。指示手段によって、２つの圧電トランスの組み付け時において、一見してこれらの組み付け方向が容易に判別され、組み付け作業時のミスがなくなり、それだけ生産効率が向上する。 Therefore, in a preferred aspect of the present invention, the case body is provided with instruction means that can be visually recognized from the outside. When the two piezoelectric transformers are assembled by the instruction means, their assembly directions can be easily discriminated at a glance, so that mistakes during the assembly work are eliminated and the production efficiency is improved accordingly.
　上述したように本発明に係る圧電トランス装置は、複数の圧電トランスを用いた場合であっても、回路基板上での実装面積を最小化し、より高密度な実装を可能とする。また、本発明に係る圧電トランス装置によれば、複数の圧電トランス同士を組み付ける際の作業性が向上し、圧電トランス装置の生産効率が大きく向上する。 As described above, the piezoelectric transformer device according to the present invention minimizes the mounting area on the circuit board and enables higher-density mounting even when a plurality of piezoelectric transformers are used. In addition, according to the piezoelectric transformer device of the present invention, workability when assembling a plurality of piezoelectric transformers is improved, and the production efficiency of the piezoelectric transformer device is greatly improved.
一実施形態の圧電トランス装置の構造を示した一側面図である。It is the one side view showing the structure of the piezoelectric transformer device of one embodiment. 図１と反対側から圧電トランス装置の構造を示した一側面図である。It is the one side view which showed the structure of the piezoelectric transformer apparatus from the opposite side to FIG. 上段の圧電トランスを単独で示す底面図である。It is a bottom view which shows the upper stage piezoelectric transformer independently. 上段の圧電トランスを単独で示す平面図である。It is a top view which shows the upper stage piezoelectric transformer independently. 圧電トランス装置全体の正面図である。It is a front view of the whole piezoelectric transformer apparatus.
　以下、本発明の実施形態について図面を参照しながら説明する。
　図１は、一実施形態の圧電トランス装置の構造を示した一側面図である。また図２は、同じく圧電トランス装置の構造を示した一側面図（図１と反対側）である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing the structure of a piezoelectric transformer device according to an embodiment. FIG. 2 is a side view (on the opposite side to FIG. 1) showing the structure of the piezoelectric transformer device.
　本実施形態の圧電トランス装置は、下段の圧電トランス１００の上に、上段の圧電トランス２００を積載した構造を有する。これら２つの圧電トランス１００，２００は構造的・電気的に相互に連結されており、図示しない回路基板に対し、下段の圧電トランス１００を向き合わせた状態で実装される。 The piezoelectric transformer device of the present embodiment has a structure in which an upper piezoelectric transformer 200 is stacked on a lower piezoelectric transformer 100. These two piezoelectric transformers 100 and 200 are structurally and electrically connected to each other, and are mounted on a circuit board (not shown) with the lower piezoelectric transformer 100 facing each other.
〔圧電体〕
　下段及び上段の圧電トランス１００，２００は、いずれも樹脂製のケース体１４に長板状又は平板状の圧電セラミックス１２を収容した基本的な構造を有する。全体としての実装高さを抑えるため、圧電セラミックス１２が平置き状態で収容され、圧電セラミックス１２の厚み方向が上下方向に一致している。 [Piezoelectric body]
The lower and upper piezoelectric transformers 100 and 200 each have a basic structure in which a long or flat piezoelectric ceramic 12 is accommodated in a resin case body 14. In order to suppress the mounting height as a whole, the piezoelectric ceramics 12 are accommodated in a flat state, and the thickness direction of the piezoelectric ceramics 12 coincides with the vertical direction.
　個々の圧電セラミックス１２には、図１及び図２に示される状態で上下の面にそれぞれ一次側電極１２ａが形成されている。圧電セラミックス１２の下面には、一次側電極１２ａと反対側の一端部に二次側電極１２ｂが形成されている。圧電セラミックス１２においては、一次側電極１２ａが形成されている部分が駆動部として機能し、一次側電極１２ａが形成されていない部分が発電部として機能する。 In each piezoelectric ceramic 12, primary side electrodes 12a are formed on the upper and lower surfaces in the state shown in FIGS. On the lower surface of the piezoelectric ceramic 12, a secondary electrode 12b is formed at one end opposite to the primary electrode 12a. In the piezoelectric ceramic 12, a portion where the primary side electrode 12a is formed functions as a drive unit, and a portion where the primary side electrode 12a is not formed functions as a power generation unit.
〔ケース体〕
　本実施形態では、下段及び上段の圧電トランス１００，２００について、共通した形状のケース体１４が用いられている。各ケース体１４は、圧電セラミックス１２よりも大きな外形をなし、その内部には凹形状の収容部１４ｃが形成されている。ケース体１４の下面は開口しており、この開口からケース体１４の内部に向けて収容部１４ｃが延びている。 [Case body]
In the present embodiment, the case body 14 having a common shape is used for the lower and upper piezoelectric transformers 100 and 200. Each case body 14 has an outer shape larger than that of the piezoelectric ceramic 12, and a concave accommodating portion 14c is formed therein. The lower surface of the case body 14 is opened, and the accommodating portion 14 c extends from the opening toward the inside of the case body 14.
　収容部１４ｃには、図示のように圧電セラミックス１２を平置きした姿勢で収容することができ、収容部１４ｃは、圧電セラミックス１２よりも一回り大きい形状又は容積を有している。圧電セラミックス１２は、ケース体１４すなわち収容部１４ｃに収容された状態で、例えば図示しないシリコーン接着剤等によって接着される。このため圧電セラミックス１２は、駆動時にケース体１４の内部で自在に振動することができ、その振動はシリコーン接着剤で吸収される。 The accommodating part 14c can accommodate the piezoelectric ceramics 12 in a flat position as shown in the figure, and the accommodating part 14c has a shape or volume that is slightly larger than that of the piezoelectric ceramics 12. The piezoelectric ceramic 12 is bonded by, for example, a silicone adhesive (not shown) while being accommodated in the case body 14, that is, the accommodating portion 14c. For this reason, the piezoelectric ceramic 12 can freely vibrate inside the case body 14 during driving, and the vibration is absorbed by the silicone adhesive.
〔突出部〕
　ケース体１４には、その両側面にそれぞれ２箇所ずつ、合計４箇所にブロック形状の突出部１４ａが一体に形成されている。これら突出部１４ａは、それぞれケース体１４の側面から、ある程度の厚みをもって側方へ突出している。さらに突出部１４ａは、ケース体１４の下面の開口から僅かに下方へも突出している。なお、図示の例では、４箇所の突出部１４ａが同じ形状として示されているが、場所ごとに突出部１４ａの形状が異なっていてもよい。 (Protrusion)
The case body 14 is integrally formed with block-shaped protrusions 14a at two places on each side surface, for a total of four places. These protrusions 14a protrude from the side surfaces of the case body 14 to the side with a certain thickness. Further, the protruding portion 14 a protrudes slightly downward from the opening on the lower surface of the case body 14. In addition, in the example of illustration, although the four protrusion parts 14a are shown as the same shape, the shape of the protrusion part 14a may differ for every place.
〔導電部材〕
　各突出部１４ａには、それぞれ導電部材１８，１８，２０，２２が挿通されている。各突出部１４ａには、導電部材１８，１８，２０，２２のための挿通穴１４ｂが形成されており、この挿通穴１４ｂは、各突出部１４ａの内部を縦方向に貫通して延びている。各導電部材１８，１８，２０，２２は、例えば金属製の棒体、いわゆるリードピンである。図示の例では断面が角形状となっているが、導電部材１８，１８，２０，２２は平板状でもよいし、丸棒形状であってもよい。なお導電部材１８，１８，２０，２２の形態は、下段の圧電トランス１００と上段の圧電トランス２００とでは異なる。以下、この点について説明する。 [Conductive member]
Conductive members 18, 18, 20, and 22 are inserted through the protrusions 14a, respectively. Each protrusion 14a is formed with an insertion hole 14b for the conductive members 18, 18, 20, and 22. The insertion hole 14b extends through the inside of each protrusion 14a in the vertical direction. . Each of the conductive members 18, 18, 20, and 22 is, for example, a metal rod, so-called lead pin. In the example shown in the figure, the cross section has a square shape, but the conductive members 18, 18, 20, and 22 may have a flat plate shape or a round bar shape. The forms of the conductive members 18, 18, 20, and 22 are different between the lower piezoelectric transformer 100 and the upper piezoelectric transformer 200. Hereinafter, this point will be described.
〔第１の実装用端子〕
　下段の圧電トランス１００では、各導電部材１８，１８，２０，２２が逆Ｌ字形状に屈曲された状態で、各突出部１４ａの挿通穴１４ｂに挿通されている。導電部材１８，１８，２０，２２の下端部は、各突出部１４ａから下方に突出しており、これら下端部がそれぞれ実装用端子１８ａ，１８ａ，２０ａ，２２ａとして形成されている。圧電トランス装置は全体として、これら実装用端子１８ａ，１８ａ，２０ａ，２２ａを用いて図示しない回路基板に実装、例えば挿入実装される。なお、圧電トランス装置は、実装用端子１８ａ，１８ａ，２０ａ，２２ａを屈曲した状態で、回路基板に面実装されてもよい。 [First mounting terminal]
In the lower piezoelectric transformer 100, the conductive members 18, 18, 20, and 22 are inserted into the insertion holes 14b of the protrusions 14a in a state of being bent in an inverted L shape. The lower ends of the conductive members 18, 18, 20, and 22 protrude downward from the protrusions 14a, and these lower ends are formed as mounting terminals 18a, 18a, 20a, and 22a, respectively. The piezoelectric transformer device as a whole is mounted, for example, inserted and mounted on a circuit board (not shown) using these mounting terminals 18a, 18a, 20a, and 22a. The piezoelectric transformer device may be surface-mounted on the circuit board with the mounting terminals 18a, 18a, 20a, and 22a bent.
〔第１の接続用端子〕
　一方、導電部材１８，１８，２０，２２の上端部は、各突出部１４ａの上面にてケース体１４の上面に沿って水平方向に屈曲されており、図示の例では、ケース体１４の長手方向に沿って両外側に向けて各上端部が延びている。これら上端部はそれぞれ接続用端子１８ｂ，１８ｂ，２０ｂ，２２ｂとして形成されており、上段の圧電トランス２００は、これら接続用端子１８ｂ，１８ｂ，２０ｂ，２２ｂを介して下段の圧電トランス１００に連結される。 [First connection terminal]
On the other hand, the upper end portions of the conductive members 18, 18, 20, and 22 are bent in the horizontal direction along the upper surface of the case body 14 at the upper surface of each protruding portion 14a. Each upper end extends in the direction toward both outer sides. These upper end portions are respectively formed as connection terminals 18b, 18b, 20b, and 22b, and the upper piezoelectric transformer 200 is connected to the lower piezoelectric transformer 100 via these connection terminals 18b, 18b, 20b, and 22b. The
　ここで、導電部材１８，１８，２０，２２の違いについて説明する。
　導電部材１８，１８は、圧電セラミックス１２の２箇所の一次側電極１２ａにそれぞれ接続される。導電部材１８，１８は、図１中では、ケース体１４の左側の一端寄り、図２中では右側の一端寄りの位置でそれぞれ両側に対をなして設けられている。ケース体１４の収容部１４ｃ内で各一次側電極１２ａにはそれぞれ導電線１６、例えば金糸線が半田付けされている。これら導電線１６，１６は収容部１４ｃからケース体１４の両外側に１本ずつ引き出され、両側の接続用端子１８ｂ，１８ｂに絡げ付けた状態で半田付けされている。なお、導電線１６は実装用端子１８ａに半田付けされていてもよい。 Here, the difference between the conductive members 18, 18, 20, and 22 will be described.
The conductive members 18 are connected to the two primary side electrodes 12a of the piezoelectric ceramic 12 respectively. The conductive members 18, 18 are provided in pairs on both sides at a position near one end on the left side of the case body 14 in FIG. 1 and near one end on the right side in FIG. A conductive wire 16, for example, a gold thread wire, is soldered to each primary side electrode 12 a in the housing portion 14 c of the case body 14. The conductive wires 16, 16 are drawn out one by one from the housing portion 14c to the outer sides of the case body 14, and are soldered in a state of being entangled with the connection terminals 18b, 18b on both sides. The conductive wire 16 may be soldered to the mounting terminal 18a.
　次に導電部材２０，２２は、ケース体１４の長手方向でみて導電部材１８，１８と反対側寄りの位置でそれぞれ両側に対をなして設けられている。圧電セラミックス１２の二次側電極１２ｂにも導電線１６が半田付けされているが、二次側電極１２ｂは１箇所だけである。このため、導電線１６は、一方の導電部材２０だけに半田付けされている。なお二次側電極１２ｂについても、導電線１６は収容部１４ｃからケース体１４の一方の外側に引き出され、そして接続用端子２０ｂ（図２参照）に絡げ付けた状態で半田付けされている。 Next, the conductive members 20 and 22 are provided in pairs on both sides at positions close to the conductive members 18 and 18 when viewed in the longitudinal direction of the case body 14. The conductive wire 16 is also soldered to the secondary electrode 12b of the piezoelectric ceramic 12, but there is only one secondary electrode 12b. For this reason, the conductive wire 16 is soldered to only one conductive member 20. In the secondary electrode 12b as well, the conductive wire 16 is drawn from the housing portion 14c to one outer side of the case body 14 and soldered in a state of being entangled with the connection terminal 20b (see FIG. 2). .
　他方の導電部材２２は、下段の圧電トランス１００に関しては、圧電セラミックス１２と電気的に非接続であり、いわゆる空端子となっている。これに対し、上段の圧電トランス２００に関しては、導電部材２２は、圧電セラミックス１２の二次側電極１２ｂと電気的に接続されている。なお、導電部材２２の接続関係についてはさらに後述する。 The other conductive member 22 is not electrically connected to the piezoelectric ceramic 12 with respect to the lower piezoelectric transformer 100 and is a so-called empty terminal. On the other hand, for the upper piezoelectric transformer 200, the conductive member 22 is electrically connected to the secondary electrode 12 b of the piezoelectric ceramic 12. The connection relationship of the conductive member 22 will be further described later.
　次に上段の圧電トランス２００では、各導電部材１８，１８，２０，２２が各突出部１４ａの挿通穴１４ｂに挿通された状態で、全体として略Ｃ字形状に屈曲されている。すなわち、導電部材１８，１８，２０，２２の上端部が、各突出部１４ａの上方でケース体１４の上面に沿うように、且つ、導電部材１８，１８，２０，２２の下端部が、各突出部１４ａの下方でケース体１４の下面に沿うように、導電部材１８，１８，２０，２２が屈曲されている。なお図示の例では、ケース体１４の長手方向でみた両外側に向けて各上端部及び下端部が延びている。 Next, in the upper piezoelectric transformer 200, the conductive members 18, 18, 20, and 22 are bent into a substantially C shape as a whole in a state where the conductive members 18, 18, 20, and 22 are inserted into the insertion holes 14b of the protrusions 14a. That is, the upper ends of the conductive members 18, 18, 20, and 22 are along the upper surface of the case body 14 above the protrusions 14a, and the lower ends of the conductive members 18, 18, 20, and 22 are The conductive members 18, 18, 20, and 22 are bent along the lower surface of the case body 14 below the protruding portion 14a. In the example shown in the drawing, each upper end and lower end extend toward both outer sides in the longitudinal direction of the case body 14.
〔第２の実装用端子〕
　図３は、上段の圧電トランス２００を単独で示す底面図である。また図４は、上段の圧電トランス２００を単独で示す平面図である。以下、図１及び図２に加えて、これら図３及び図４を参照しつつ説明する。 [Second mounting terminal]
FIG. 3 is a bottom view showing the upper piezoelectric transformer 200 alone. FIG. 4 is a plan view showing the upper piezoelectric transformer 200 alone. Hereinafter, description will be made with reference to FIGS. 3 and 4 in addition to FIGS. 1 and 2.
　上段の圧電トランス２００に関しては、各導電部材１８，１８，２０，２２の下端部がそれぞれ実装用端子１８ｃ，１８ｃ，２０ｃ，２２ｃとして形成されている。図１及び図２に示されているように、上段の圧電トランス２００は、これら実装用端子１８ｃ，１８ｃ，２０ｃ，２２ｃを下段の接続用端子１８ｂ，１８ｂ，２２ｂ，２０ｂにそれぞれ接続することで、下段の圧電トランス１００を介して回路基板に実装される。 For the upper piezoelectric transformer 200, the lower ends of the conductive members 18, 18, 20, and 22 are formed as mounting terminals 18c, 18c, 20c, and 22c, respectively. As shown in FIGS. 1 and 2, the upper piezoelectric transformer 200 connects these mounting terminals 18c, 18c, 20c, and 22c to the lower connection terminals 18b, 18b, 22b, and 20b, respectively. It is mounted on the circuit board via the lower piezoelectric transformer 100.
　なお本実施形態では、上段の圧電トランス２００に関しては、導電部材１８，１８，２０，２２の各上端部１８ｄ，１８ｄ，２０ｄ，２２ｄは特に接続用端子として使用されないが、図示されていない３段目以降の他の圧電トランスが設けられる場合、各上端部１８ｄ，１８ｄ，２０ｄ，２２ｄが接続用端子として使用される。 In the present embodiment, with respect to the upper piezoelectric transformer 200, the upper end portions 18d, 18d, 20d, and 22d of the conductive members 18, 18, 20, and 22 are not particularly used as connection terminals, but are not illustrated. When other piezoelectric transformers after the first are provided, the upper end portions 18d, 18d, 20d, and 22d are used as connection terminals.
　導電部材１８，１８，２０，２２の違いについては、下段の圧電トランス１００と同様である。すなわち、導電部材１８，１８は、図１、図３及び図４中では、ケース体１４の左側の一端寄り、図２中では右側の一端寄りの位置でそれぞれ両側に対をなして設けられている。一次側電極１２ａに半田付けされた２本の導電線１６，１６は、収容部１４ｃからケース体１４の両外側に１本ずつ引き出され、そして両側の上端部１８ｄ，１８ｄにそれぞれ絡げ付けた状態で半田付けされている。なお、導電線１６は実装用端子１８ｃに半田付けされていてもよい。 The difference between the conductive members 18, 18, 20, and 22 is the same as that of the lower piezoelectric transformer 100. That is, the conductive members 18, 18 are provided in pairs on both sides at positions near one end on the left side of the case body 14 in FIGS. 1, 3, and 4, and near one end on the right side in FIG. Yes. The two conductive wires 16 and 16 soldered to the primary side electrode 12a are drawn out one by one from the housing portion 14c to the outer sides of the case body 14, and entangled with the upper end portions 18d and 18d on both sides, respectively. Soldered in a state. The conductive wire 16 may be soldered to the mounting terminal 18c.
　また導電部材２０，２２は、下段の圧電トランス１００と同様に、ケース体１４の長手方向でみて導電部材１８と反対側寄りの位置でそれぞれ両側に対をなして設けられている。図３及び図４に示されているように、二次側電極１２ｂに半田付けされた導電線１６は、一方の導電部材２０の上端部２０ｄに絡げ付けた状態で半田付けされている。二次側電極１２ｂについても、導電線１６は実装用端子２０ｃに半田付けされていてもよい。なお下段の圧電トランス１００に関しても、他方の導電部材２２は圧電セラミックス１２と電気的に非接続であり、いわゆる空端子となっている。 Also, like the piezoelectric transformer 100 in the lower stage, the conductive members 20 and 22 are provided in pairs on both sides at positions close to the conductive member 18 when viewed in the longitudinal direction of the case body 14. As shown in FIGS. 3 and 4, the conductive wire 16 soldered to the secondary electrode 12 b is soldered in a state of being entangled with the upper end portion 20 d of one conductive member 20. As for the secondary electrode 12b, the conductive wire 16 may be soldered to the mounting terminal 20c. In the lower-stage piezoelectric transformer 100, the other conductive member 22 is not electrically connected to the piezoelectric ceramic 12 and is a so-called empty terminal.
　ここで図１及び図２に示されているように、上段の圧電トランス２００と下段の圧電トランス１００とでは、導電部材２０，２２の配置が両側面で逆となっている。すなわち、２つの圧電トランス１００，２００を上下に重ね合わせると、ケース体１４の一方の側面では下段の導電部材２０の上に上段の導電部材２２が位置し、他方の側面では下段の導電部材２２の上に上段の導電部材２０が位置する。 Here, as shown in FIGS. 1 and 2, in the upper piezoelectric transformer 200 and the lower piezoelectric transformer 100, the arrangement of the conductive members 20 and 22 is reversed on both side surfaces. That is, when the two piezoelectric transformers 100 and 200 are vertically stacked, the upper conductive member 22 is positioned on the lower conductive member 20 on one side surface of the case body 14, and the lower conductive member 22 is positioned on the other side surface. The upper conductive member 20 is located on the upper side.
〔組み付け作業性の改善〕
　次に、圧電トランス装置の組み付け作業において、上段の圧電トランス２００の積載時に座りを安定化させるための構成について説明する。 [Improvement of assembly workability]
Next, a configuration for stabilizing the sitting when the upper piezoelectric transformer 200 is loaded in the assembly operation of the piezoelectric transformer device will be described.
　図５は、圧電トランス装置全体の正面図である。なお図５では、二次側電極１２ｂを正面の方向としている。以下、図１～図４に図５を追加して説明する。 FIG. 5 is a front view of the entire piezoelectric transformer device. In FIG. 5, the secondary electrode 12b is set to the front direction. Hereinafter, FIG. 5 will be added to FIGS.
〔案内部〕
　各ケース体１４には、予めその上面の４箇所に突起状の案内部１４ｄが一体として形成されている。案内部１４ｄは、例えば各突出部１４ａの上方で、ケース体１４の各側面と面一に位置し、ケース体１４の上面からある程度の高さまで上方へ突出している。なお図示の例では、ケース体１４の長手方向で案内部１４ｄの長さが突出部１４ａの幅と同等となっているが、特にこれに限られるものではない。 [Guidance Department]
Each case body 14 is integrally formed with projection-like guide portions 14d at four locations on the upper surface thereof in advance. The guide portion 14d is positioned flush with each side surface of the case body 14 above each projection portion 14a, for example, and projects upward from the upper surface of the case body 14 to a certain height. In the illustrated example, the length of the guide portion 14d is equal to the width of the protruding portion 14a in the longitudinal direction of the case body 14, but is not particularly limited thereto.
　一方、各突出部１４ａの下端部は、ケース体１４の下面からある程度の長さだけ下方に突出している。このため図１、図２及び図５に示されているように、下段の圧電トランス１００の上に上段の圧電トランス２００を積載すると、上段の突出部１４ａの下端部が下段の案内部１４ｄの側面に沿って案内され、ケース体１４同士が相互に位置決めされる。またこのとき、互いの接続用端子１８ｂ，１８ｂ，２０ｂ，２２ｂと実装用端子１８ｃ，１８ｃ，２２ｃ，２０ｃとがそれぞれ上下に重なり合う。 On the other hand, the lower end of each protrusion 14a protrudes downward from the lower surface of the case body 14 by a certain length. For this reason, as shown in FIGS. 1, 2 and 5, when the upper piezoelectric transformer 200 is loaded on the lower piezoelectric transformer 100, the lower end portion of the upper protruding portion 14a becomes the lower guide portion 14d. Guided along the side surface, the case bodies 14 are positioned relative to each other. At this time, the connection terminals 18b, 18b, 20b, and 22b and the mounting terminals 18c, 18c, 22c, and 20c overlap each other.
　上記のように下段の圧電トランス１００の上に上段の圧電トランス２００を積載すると、今度は各案内部１４ｄに突出部１４ａの下端部が接した状態となり、そのまま上段の圧電トランス２００の座りを安定化させることができる。これにより、接続用端子１８ｂ，１８ｂ，２０ｂ，２２ｂと実装用端子１８ｃ，１８ｃ，２２ｃ，２０ｃとの接合作業、例えば、半田付けや熱硬化型導電性ペーストの塗布を効率よく行うことができる。 When the upper piezoelectric transformer 200 is loaded on the lower piezoelectric transformer 100 as described above, the lower end portion of the projecting portion 14a is in contact with each guide portion 14d, and the upper piezoelectric transformer 200 can be stably seated as it is. It can be made. Thereby, joining operation | work of the terminal 18b, 18b, 20b, 22b for connection and the terminal 18c, 18c, 22c, 20c for mounting, for example, soldering and application | coating of a thermosetting conductive paste can be performed efficiently.
〔接合作業用空間〕
　また図３及び図４に示されているように、各導電部材１８，１８，２０，２２は、ケース体１４の両側面からある程度の間隔だけ離れた位置に設けられている。これは下段の圧電トランス１００についても同様である。このように、ケース体１４の両側面と接続用端子１８ｂ，１８ｂ，２０ｂ，２２ｂ、実装用端子１８ｃ，１８ｃ，２２ｃ，２０ｃとの間には、接合作業用の空間が確保されているため、圧電トランス装置の製造過程で、これらの接合作業を極めて容易に行うことができる。 [Space for joining work]
Further, as shown in FIGS. 3 and 4, the conductive members 18, 18, 20, and 22 are provided at positions spaced apart from the both side surfaces of the case body 14 by a certain distance. The same applies to the lower piezoelectric transformer 100. As described above, a space for joining work is secured between the both side surfaces of the case body 14 and the connection terminals 18b, 18b, 20b, and 22b and the mounting terminals 18c, 18c, 22c, and 20c. These joining operations can be performed very easily during the manufacturing process of the piezoelectric transformer device.
〔上段の圧電トランスの電気的接続〕
　上段の圧電トランス２００については、互いに極性の異なる２箇所の一次側電極１２ａがそれぞれ実装用端子１８ｃを通じて下段の圧電トランス１００の接続用端子１８ｂに接続される。このとき上段と下段とで一次側電極１２ａの極性を互いに一致させることで、２つの圧電トランス１００，２００の入力側を並列に構成することができる。 [Electrical connection of the upper piezoelectric transformer]
In the upper-stage piezoelectric transformer 200, two primary-side electrodes 12a having different polarities are connected to the connection terminals 18b of the lower-stage piezoelectric transformer 100 through the mounting terminals 18c, respectively. At this time, the input sides of the two piezoelectric transformers 100 and 200 can be configured in parallel by matching the polarities of the primary electrodes 12a in the upper and lower stages.
　また図５に示されているように、上段の圧電トランス２００については、二次側電極１２ｂが一方の、図５では左側の実装用端子２０ｃを通じて下段の接続用端子２２ｂに接続されることで、下段で空端子となっていた実装用端子２２ａを介して実装用端子２０ｃが回路基板に接続される。これにより、上段の圧電トランス２００が、特別に長い端子を用いることなく、容易に回路基板へ実装される。 Further, as shown in FIG. 5, in the upper piezoelectric transformer 200, the secondary electrode 12b is connected to the lower connecting terminal 22b through the mounting terminal 20c on the left side in FIG. The mounting terminal 20c is connected to the circuit board via the mounting terminal 22a which has been an empty terminal in the lower stage. Thereby, the upper piezoelectric transformer 200 is easily mounted on the circuit board without using a particularly long terminal.
〔方向の指示〕
　なおケース体１４には、例えば長手方向でみた一端面にマーカ部１４ｅが一体にして形成されている。このマーカ部１４ｅは、圧電トランス１００，２００の組み付け時に互いの方向を合わせるための印である。マーカ部１４ｅは、外部から容易に視認可能な位置に突出して形成されているため、例えば組み付け作業者は、マーカ部１４ｅの向きを合わせながら上下段の圧電トランス１００，２００を組み付ければよい。これにより、単純な作業ミス、例えば一次側電極１２ａと二次側電極１２ｂを接合する等のミスが確実に防止される。 [Direction of direction]
In addition, the marker part 14e is integrally formed in the case body 14, for example in the end surface seen in the longitudinal direction. The marker part 14e is a mark for aligning the directions of the piezoelectric transformers 100 and 200 when assembled. Since the marker portion 14e is formed so as to protrude at a position where it can be easily visually recognized from the outside, for example, the assembling operator may assemble the upper and lower piezoelectric transformers 100 and 200 while aligning the orientation of the marker portion 14e. Thereby, a simple operation mistake, for example, a mistake such as joining the primary side electrode 12a and the secondary side electrode 12b is reliably prevented.
　上述した一実施形態の圧電トランス装置は、複数ある圧電トランス１００，２００で互いのケース体１４の形状が共通であるため、以下のような利点を生じる。 The piezoelectric transformer device according to the embodiment described above has the following advantages because the plurality of piezoelectric transformers 100 and 200 have the same shape of the case body 14.
（１）ケース体１４の設計や製造過程、例えば金型等が共通化され、それだけ設計や製造にかかる工数が抑えられ、製造コストの低減が実現される。 (1) The design and manufacturing process of the case body 14, for example, a mold or the like is made common, the man-hour required for the design and manufacturing is reduced, and the manufacturing cost is reduced.
（２）複数段に圧電トランス１００，２００を重ねて圧電トランス装置を構成しても、全体として１個分以上に実装面積が増大することがない。このため、回路基板に対してより高密度に圧電トランス１００，２００が実装される。 (2) Even if the piezoelectric transformer device is configured by stacking the piezoelectric transformers 100 and 200 in a plurality of stages, the mounting area does not increase to one or more as a whole. For this reason, the piezoelectric transformers 100 and 200 are mounted on the circuit board at a higher density.
　またケース体１４の構造上の改良、例えば突出部１４ａや作業用空間等により、圧電トランス１００，２００の組み付け作業や半田付の作業性が向上し、圧電トランス装置の生産効率が大きく向上する。 Also, the structural improvement of the case body 14, for example, the projecting portion 14 a and the work space, improves the assembly work of the piezoelectric transformers 100 and 200 and the soldering workability, and greatly improves the production efficiency of the piezoelectric transformer device.
　本発明は上述した実施形態に制約されることなく、種々に変形して実施可能である。例えば、圧電セラミックス１２の形状は図示のものに限られず、その他の形状であってもよい。またケース体１４の形状は、圧電セラミックス１２の外形に合わせて適宜に変形が可能である。 The present invention can be implemented with various modifications without being limited to the above-described embodiments. For example, the shape of the piezoelectric ceramic 12 is not limited to the illustrated shape, and may be other shapes. Further, the shape of the case body 14 can be appropriately modified in accordance with the outer shape of the piezoelectric ceramic 12.
　一実施形態では、上下段の圧電トランス１００，２００で共通形状のケース体１４を使用しているが、異なる形状のケース体を使用してもよい。例えば、下段の圧電トランス１００については一実施形態と同じ形状のケース体１４を使用し、上段の圧電トランス２００については、ケース体１４よりも回路基板上に投影したときの実装面積又は実装領域が小さいものを使用してもよい。この場合であっても、上段の圧電トランス２００は下段の圧電トランス１００の実装面積又は実装領域の範囲内に収めることで、回路基板内での圧電トランス装置の実装面積が最小化される。 In the embodiment, the case body 14 having a common shape is used in the upper and lower piezoelectric transformers 100 and 200, but case bodies having different shapes may be used. For example, the case body 14 having the same shape as that of the embodiment is used for the lower piezoelectric transformer 100, and the mounting area or mounting area when the upper piezoelectric transformer 200 is projected onto the circuit board rather than the case body 14 is larger. Smaller ones may be used. Even in this case, the mounting area of the piezoelectric transformer device in the circuit board is minimized by accommodating the upper piezoelectric transformer 200 within the mounting area or mounting area of the lower piezoelectric transformer 100.
　一実施形態では、圧電トランス１００，２００を上下２段に積層した例を挙げているが、圧電トランス装置は３段以上の圧電トランスを有していてもよい。一実施形態では上下の圧電トランス１００，２００で二次側電極１２ｂ同士を絶縁しているが、これらを接続してもよい。 In one embodiment, an example is given in which the piezoelectric transformers 100 and 200 are stacked in two upper and lower stages, but the piezoelectric transformer device may have three or more stages of piezoelectric transformers. In one embodiment, the upper and lower piezoelectric transformers 100 and 200 insulate the secondary side electrodes 12b from each other, but they may be connected.
　一実施形態では、マーカ部１４ｅとして突起形状のものを例に挙げているが、窪み形状のものであってもよい。また、方向の指示を行う手段は、ケース体１４の外面に印刷やレーザー捺染等で施されたマーキングであってもよい。 In one embodiment, the marker portion 14e is exemplified as a protrusion shape, but may be a depression shape. Further, the means for instructing the direction may be a marking applied to the outer surface of the case body 14 by printing or laser printing.
　その他、一実施形態において図示とともに挙げた構造はあくまで好ましい一例であり、基本的な構造に各種の要素を付加し、あるいは一部を置換しても本発明を好適に実施可能であることはいうまでもない。 In addition, the structure given with illustration in the embodiment is only a preferable example, and it can be said that the present invention can be suitably implemented even if various elements are added to the basic structure or a part thereof is replaced. Not too long.
符号の説明Explanation of symbols
１２　　圧電セラミックス（圧電体）
１２ａ　一次側電極
１２ｂ　二次側電極
１４　　ケース体
１４ａ　突出部
１４ｃ　収容部
１４ｄ　案内部
１４ｅ　マーカ部（指示手段）
１６　　導電線
１８，２０，２２　導電部材
１８ａ，２０ａ，２２ａ　実装用端子
１８ｂ，２０ｂ，２２ｂ　接続用端子
１８ｃ，２０ｃ，２２ｃ　実装用端子
１００，２００　圧電トランス 12 Piezoelectric ceramics (piezoelectric material)
12a Primary side electrode 12b Secondary side electrode 14 Case body 14a Projection part 14c Storage part 14d Guide part 14e Marker part (instruction means)
16 Conductive wires 18, 20, 22 Conductive members 18a, 20a, 22a Mounting terminals 18b, 20b, 22b Connecting terminals 18c, 20c, 22c Mounting terminals 100, 200 Piezoelectric transformer

Claims (24)

  1. 　第１のケース体に第１の圧電体を収容した状態で回路基板に実装される第１の圧電トランスと、
    　第２のケース体に第２の圧電体を収容し、かつ前記第１の圧電トランスの上方に積載した状態で前記第１の圧電トランスを介して前記回路基板に実装され、前記回路基板上に投影した実装面積が前記第１の圧電トランスの前記回路基板内に占める実装面積の範囲内である第２の圧電トランスと
    を備えたことを特徴とする圧電トランス装置。     A first piezoelectric transformer mounted on a circuit board in a state in which the first piezoelectric body is accommodated in the first case body;
    A second piezoelectric body is housed in a second case body and mounted on the circuit board via the first piezoelectric transformer in a state of being stacked above the first piezoelectric transformer, and is mounted on the circuit board. A piezoelectric transformer device, comprising: a second piezoelectric transformer whose projected mounting area is within a mounting area of the first piezoelectric transformer in the circuit board.
  2. 　請求項１に記載の圧電トランス装置であって、
    　前記第１及び第２のケース体は、互いに共通の所定形状を有する。     The piezoelectric transformer device according to claim 1,
    The first and second case bodies have a predetermined shape common to each other.
  3. 　請求項２に記載の圧電トランス装置であって、
    　前記第１及び第２のケース体は、
    　それぞれ側面から突出して形成された突出部を有しており、
    　前記第１の圧電トランスは、
    　前記第１のケース体の突出部を上下方向に貫通して延び、その下端部が前記回路基板の配線パターンに接続される第１の実装用端子として形成され、上端部が前記突出部の上面に沿って屈曲されて前記第２の圧電トランスと接続される第１の接続用端子として形成された第１の導電部材を有し、
    　前記第２の圧電トランスは、
    　前記第２のケース体の突出部を上下方向に貫通して延び、下端部が前記突出部の下面に沿って屈曲されて前記第１の圧電トランスの接続用端子と接続される第２の実装用端子として形成された第２の導電部材を有し、
    　前記第１の圧電トランス上に前記第２の圧電トランスを積載した状態で、前記第２の実装用端子と前記第１の接続用端子とが相互に接合されている。     The piezoelectric transformer device according to claim 2,
    The first and second case bodies are:
    Each has a protruding part that protrudes from the side,
    The first piezoelectric transformer is
    The projecting portion of the first case body extends in the vertical direction, the lower end portion is formed as a first mounting terminal connected to the wiring pattern of the circuit board, and the upper end portion is the upper surface of the projecting portion. A first conductive member formed as a first connection terminal that is bent along the line and connected to the second piezoelectric transformer,
    The second piezoelectric transformer is
    A second mounting that extends vertically through the projecting portion of the second case body and that has a lower end bent along the lower surface of the projecting portion and connected to the connection terminal of the first piezoelectric transformer. A second conductive member formed as a terminal for use;
    In a state where the second piezoelectric transformer is mounted on the first piezoelectric transformer, the second mounting terminal and the first connection terminal are bonded to each other.
  4. 　請求項３に記載の圧電トランス装置であって、
    　前記第１及び第２のケース体の各側面から前記第１の接続用端子及び前記第２の実装用端子が離隔して設けられていることにより、これらの間に接合作業用の空間が確保されている。     The piezoelectric transformer device according to claim 3,
    Since the first connection terminal and the second mounting terminal are provided apart from the side surfaces of the first and second case bodies, a space for joining work is secured between them. Has been.
  5. 　請求項４に記載の圧電トランス装置であって、
    　前記第１の圧電トランスは、
    　前記第１のケース体の上部に設けられ、前記第２の圧電トランスを積載した状態で前記第２のケース体を前記第１のケース体に対して位置決めする案内部を有する。     The piezoelectric transformer device according to claim 4,
    The first piezoelectric transformer is
    A guide portion is provided on an upper portion of the first case body and positions the second case body with respect to the first case body in a state where the second piezoelectric transformer is loaded.
  6. 　請求項５に記載の圧電トランス装置であって、
    　前記案内部は、前記第１のケース体の上面から上方に突出しており、かつ、
    　前記突出部は、少なくとも前記第２のケース体の下面から下方に突出しており、
    　前記第２の圧電トランスが前記第１の圧電トランス上に積載された状態で、前記突出部が前記案内部に案内されることで前記第２のケース体が前記第１のケース体に対して位置決めされる。     The piezoelectric transformer device according to claim 5,
    The guide portion protrudes upward from the upper surface of the first case body, and
    The protruding portion protrudes downward from at least the lower surface of the second case body,
    In a state where the second piezoelectric transformer is loaded on the first piezoelectric transformer, the projecting portion is guided by the guide portion, so that the second case body is relative to the first case body. Positioned.
  7. 　請求項３乃至６のいずれかに記載の圧電トランス装置であって、
    　前記突出部及び前記導電部材は、前記第１及び第２のケース体にそれぞれ４箇所ずつ設けられており、
    　前記第１の圧電トランスは、
    　前記第１のケース体に形成された４箇所の前記突出部のうち、２箇所については前記第１の実装用端子及び第１の接続用端子が前記圧電体の２つの一次側電極にそれぞれ接続されるとともに、その他の２箇所では一方の前記第１の実装用端子及び第１の接続用端子が前記圧電体の二次側電極に接続され、その他方の前記第１の実装用端子及び第１の接続用端子が前記圧電体とは非接続であり、
    　前記第２の圧電トランスは、
    　前記第２のケース体に形成された４箇所の前記突出部のうち、２箇所については前記第２の実装用端子が前記圧電体の２つの一次側電極にそれぞれ接続されるとともに、その他の２箇所では一方の前記第２の実装用端子が前記圧電体とは非接触であり、その他方の前記第２の実装用端子が前記圧電体の二次側電極に接続されており、
    　前記第１の圧電トランス上に前記第２の圧電トランスを積載した状態で、
    　前記第２の圧電トランスについて前記圧電体の二次側電極に接続された他方の前記第２の実装用端子は、前記第１の圧電トランスについて前記圧電体とは非接続である他方の前記第１の接続用端子と接合されており、かつ、前記第２の圧電トランスについて前記圧電体の二次側電極とは非接続である一方の前記第２の実装用端子は、前記第１の圧電トランスについて前記圧電体の二次側電極に接続された一方の前記第１の接続用端子と接合されている。     The piezoelectric transformer device according to any one of claims 3 to 6,
    The projecting portion and the conductive member are provided at four locations on the first and second case bodies, respectively.
    The first piezoelectric transformer is
    Of the four protrusions formed on the first case body, the first mounting terminal and the first connection terminal are connected to the two primary electrodes of the piezoelectric body at two positions, respectively. At the other two locations, one of the first mounting terminal and the first connection terminal is connected to the secondary electrode of the piezoelectric body, and the other of the first mounting terminal and the first connection terminal 1 connection terminal is not connected to the piezoelectric body,
    The second piezoelectric transformer is
    Of the four projecting portions formed on the second case body, the second mounting terminal is connected to the two primary electrodes of the piezoelectric body at two locations, and the other two In one place, one of the second mounting terminals is not in contact with the piezoelectric body, and the other second mounting terminal is connected to the secondary electrode of the piezoelectric body,
    With the second piezoelectric transformer being loaded on the first piezoelectric transformer,
    The other second mounting terminal connected to the secondary electrode of the piezoelectric body of the second piezoelectric transformer is not connected to the piezoelectric body of the first piezoelectric transformer. One of the second mounting terminals that is joined to one connection terminal and is not connected to the secondary electrode of the piezoelectric body with respect to the second piezoelectric transformer is the first piezoelectric transformer. The transformer is joined to one of the first connection terminals connected to the secondary electrode of the piezoelectric body.
  8. 　請求項１乃至６のいずれかに記載の圧電トランス装置であって、
    　前記第１及び第２のケース体は、外側から視認可能な位置に互いの組み付け方向を指示する指示手段を有する。     The piezoelectric transformer device according to any one of claims 1 to 6,
    The first and second case bodies have instruction means for instructing the assembling direction of each other at a position visible from the outside.
  9. 　請求項１に記載の圧電トランス装置であって、
    　前記第１及び第２のケース体は、
    　それぞれ側面から突出して形成された突出部を有しており、
    　前記第１の圧電トランスは、
    　前記第１のケース体の突出部を上下方向に貫通して延び、その下端部が前記回路基板の配線パターンに接続される第１の実装用端子として形成され、上端部が前記突出部の上面に沿って屈曲されて前記第２の圧電トランスと接続される第１の接続用端子として形成された第１の導電部材を有し、
    　前記第２の圧電トランスは、
    　前記第２のケース体の突出部を上下方向に貫通して延び、下端部が前記突出部の下面に沿って屈曲されて前記第１の圧電トランスの接続用端子と接続される第２の実装用端子として形成された第２の導電部材を有し、
    　前記第１の圧電トランス上に前記第２の圧電トランスを積載した状態で、前記第２の実装用端子と前記第１の接続用端子とが相互に接合されている。     The piezoelectric transformer device according to claim 1,
    The first and second case bodies are:
    Each has a protruding part that protrudes from the side,
    The first piezoelectric transformer is
    The projecting portion of the first case body extends in the vertical direction, the lower end portion is formed as a first mounting terminal connected to the wiring pattern of the circuit board, and the upper end portion is the upper surface of the projecting portion. A first conductive member formed as a first connection terminal that is bent along the line and connected to the second piezoelectric transformer,
    The second piezoelectric transformer is
    A second mounting that extends vertically through the projecting portion of the second case body and that has a lower end bent along the lower surface of the projecting portion and connected to the connection terminal of the first piezoelectric transformer. A second conductive member formed as a terminal for use;
    In a state where the second piezoelectric transformer is mounted on the first piezoelectric transformer, the second mounting terminal and the first connection terminal are bonded to each other.
  10. クレーム９に記載の圧電トランス装置であって、
    　前記第１及び第２のケース体の各側面から前記第１の接続用端子及び前記第２の実装用端子が離隔して設けられていることにより、これらの間に接合作業用の空間が確保されている。     A piezoelectric transformer device according to claim 9,
    Since the first connection terminal and the second mounting terminal are provided apart from the side surfaces of the first and second case bodies, a space for joining work is secured between them. Has been.
  11. 　請求項１０に記載の圧電トランス装置であって、
    　前記第１の圧電トランスは、
    　前記第１のケース体の上部に設けられ、前記第２の圧電トランスを積載した状態で前記第２のケース体を前記第１のケース体に対して位置決めする案内部を有する。     The piezoelectric transformer device according to claim 10,
    The first piezoelectric transformer is
    A guide portion is provided on an upper portion of the first case body and positions the second case body with respect to the first case body in a state where the second piezoelectric transformer is loaded.
  12. 　請求項１１に記載の圧電トランス装置であって、
    　前記案内部は、前記第１のケース体の上面から上方に突出しており、かつ、
    　前記突出部は、少なくとも前記第２のケース体の下面から下方に突出しており、
    　前記第２の圧電トランスが前記第１の圧電トランス上に積載された状態で、前記突出部が前記案内部に案内されることで前記第２のケース体が前記第１のケース体に対して位置決めされる。     The piezoelectric transformer device according to claim 11,
    The guide portion protrudes upward from the upper surface of the first case body, and
    The protruding portion protrudes downward from at least the lower surface of the second case body,
    In a state where the second piezoelectric transformer is loaded on the first piezoelectric transformer, the projecting portion is guided by the guide portion, so that the second case body is relative to the first case body. Positioned.
  13. 　請求項９乃至１２のいずれかに記載の圧電トランス装置であって、
    　前記突出部及び前記導電部材は、前記第１及び第２のケース体にそれぞれ４箇所ずつ設けられており、
    　前記第１の圧電トランスは、
    　前記第１のケース体に形成された４箇所の前記突出部のうち、２箇所については前記第１の実装用端子及び第１の接続用端子が前記圧電体の２つの一次側電極にそれぞれ接続されるとともに、その他の２箇所では一方の前記第１の実装用端子及び第１の接続用端子が前記圧電体の二次側電極に接続され、その他方の前記第１の実装用端子及び第１の接続用端子が前記圧電体とは非接続であり、
    　前記第２の圧電トランスは、
    　前記第２のケース体に形成された４箇所の前記突出部のうち、２箇所については前記第２の実装用端子が前記圧電体の２つの一次側電極にそれぞれ接続されるとともに、その他の２箇所では一方の前記第２の実装用端子が前記圧電体とは非接触であり、その他方の前記第２の実装用端子が前記圧電体の二次側電極に接続されており、
    　前記第１の圧電トランス上に前記第２の圧電トランスを積載した状態で、
    　前記第２の圧電トランスについて前記圧電体の二次側電極に接続された他方の前記第２の実装用端子は、前記第１の圧電トランスについて前記圧電体とは非接続である他方の前記第１の接続用端子と接合されており、かつ、前記第２の圧電トランスについて前記圧電体の二次側電極とは非接続である一方の前記第２の実装用端子は、前記第１の圧電トランスについて前記圧電体の二次側電極に接続された一方の前記第１の接続用端子と接合されている。     The piezoelectric transformer device according to any one of claims 9 to 12,
    The projecting portion and the conductive member are provided at four locations on the first and second case bodies, respectively.
    The first piezoelectric transformer is
    Of the four protrusions formed on the first case body, the first mounting terminal and the first connection terminal are connected to the two primary electrodes of the piezoelectric body at two positions, respectively. At the other two locations, one of the first mounting terminal and the first connection terminal is connected to the secondary electrode of the piezoelectric body, and the other of the first mounting terminal and the first connection terminal 1 connection terminal is not connected to the piezoelectric body,
    The second piezoelectric transformer is
    Of the four projecting portions formed on the second case body, the second mounting terminal is connected to the two primary electrodes of the piezoelectric body at two locations, and the other two In one place, one of the second mounting terminals is not in contact with the piezoelectric body, and the other second mounting terminal is connected to the secondary electrode of the piezoelectric body,
    With the second piezoelectric transformer being loaded on the first piezoelectric transformer,
    The other second mounting terminal connected to the secondary electrode of the piezoelectric body of the second piezoelectric transformer is not connected to the piezoelectric body of the first piezoelectric transformer. One of the second mounting terminals that is joined to one connection terminal and is not connected to the secondary electrode of the piezoelectric body with respect to the second piezoelectric transformer is the first piezoelectric transformer. The transformer is joined to one of the first connection terminals connected to the secondary electrode of the piezoelectric body.
  14. 　請求項３に記載の圧電トランス装置であって、
    　前記第１の圧電トランスは、
    　前記第１のケース体の上部に設けられ、前記第２の圧電トランスを積載した状態で前記第２のケース体を前記第１のケース体に対して位置決めする案内部を有する。     The piezoelectric transformer device according to claim 3,
    The first piezoelectric transformer is
    A guide portion is provided on an upper portion of the first case body and positions the second case body with respect to the first case body in a state where the second piezoelectric transformer is loaded.
  15. 　請求項１４に記載の圧電トランス装置であって、
    　前記案内部は、前記第１のケース体の上面から上方に突出しており、かつ、
    　前記突出部は、少なくとも前記第２のケース体の下面から下方に突出しており、
    　前記第２の圧電トランスが前記第１の圧電トランス上に積載された状態で、前記突出部が前記案内部に案内されることで前記第２のケース体が前記第１のケース体に対して位置決めされる。     The piezoelectric transformer device according to claim 14,
    The guide portion protrudes upward from the upper surface of the first case body, and
    The protruding portion protrudes downward from at least the lower surface of the second case body,
    In a state where the second piezoelectric transformer is loaded on the first piezoelectric transformer, the projecting portion is guided by the guide portion, so that the second case body is relative to the first case body. Positioned.
  16. 　請求項１４又は１５に記載の圧電トランス装置であって、
    　前記突出部及び前記導電部材は、前記第１及び第２のケース体にそれぞれ４箇所ずつ設けられており、
    　前記第１の圧電トランスは、
    　前記第１のケース体に形成された４箇所の前記突出部のうち、２箇所については前記第１の実装用端子及び第１の接続用端子が前記圧電体の２つの一次側電極にそれぞれ接続されるとともに、その他の２箇所では一方の前記第１の実装用端子及び第１の接続用端子が前記圧電体の二次側電極に接続され、その他方の前記第１の実装用端子及び第１の接続用端子が前記圧電体とは非接続であり、
    　前記第２の圧電トランスは、
    　前記第２のケース体に形成された４箇所の前記突出部のうち、２箇所については前記第２の実装用端子が前記圧電体の２つの一次側電極にそれぞれ接続されるとともに、その他の２箇所では一方の前記第２の実装用端子が前記圧電体とは非接触であり、その他方の前記第２の実装用端子が前記圧電体の二次側電極に接続されており、
    　前記第１の圧電トランス上に前記第２の圧電トランスを積載した状態で、
    　前記第２の圧電トランスについて前記圧電体の二次側電極に接続された他方の前記第２の実装用端子は、前記第１の圧電トランスについて前記圧電体とは非接続である他方の前記第１の接続用端子と接合されており、かつ、前記第２の圧電トランスについて前記圧電体の二次側電極とは非接続である一方の前記第２の実装用端子は、前記第１の圧電トランスについて前記圧電体の二次側電極に接続された一方の前記第１の接続用端子と接合されている。     The piezoelectric transformer device according to claim 14 or 15,
    The projecting portion and the conductive member are provided at four locations on the first and second case bodies, respectively.
    The first piezoelectric transformer is
    Of the four protrusions formed on the first case body, the first mounting terminal and the first connection terminal are connected to the two primary electrodes of the piezoelectric body at two positions, respectively. At the other two locations, one of the first mounting terminal and the first connection terminal is connected to the secondary electrode of the piezoelectric body, and the other of the first mounting terminal and the first connection terminal 1 connection terminal is not connected to the piezoelectric body,
    The second piezoelectric transformer is
    Of the four projecting portions formed on the second case body, the second mounting terminal is connected to the two primary electrodes of the piezoelectric body at two locations, and the other two In one place, one of the second mounting terminals is not in contact with the piezoelectric body, and the other second mounting terminal is connected to the secondary electrode of the piezoelectric body,
    With the second piezoelectric transformer being loaded on the first piezoelectric transformer,
    The other second mounting terminal connected to the secondary electrode of the piezoelectric body of the second piezoelectric transformer is not connected to the piezoelectric body of the first piezoelectric transformer. One of the second mounting terminals that is joined to one connection terminal and is not connected to the secondary electrode of the piezoelectric body with respect to the second piezoelectric transformer is the first piezoelectric transformer. The transformer is joined to one of the first connection terminals connected to the secondary electrode of the piezoelectric body.
  17. 　請求項９に記載の圧電トランス装置であって、
    　前記第１の圧電トランスは、
    　前記第１のケース体の上部に設けられ、前記第２の圧電トランスを積載した状態で前記第２のケース体を前記第１のケース体に対して位置決めする案内部を有する。     The piezoelectric transformer device according to claim 9,
    The first piezoelectric transformer is
    A guide portion is provided on an upper portion of the first case body and positions the second case body with respect to the first case body in a state where the second piezoelectric transformer is loaded.
  18. 　請求項１７に記載の圧電トランス装置であって、
    　前記案内部は、前記第１のケース体の上面から上方に突出しており、かつ、
    　前記突出部は、少なくとも前記第２のケース体の下面から下方に突出しており、
    　前記第２の圧電トランスが前記第１の圧電トランス上に積載された状態で、前記突出部が前記案内部に案内されることで前記第２のケース体が前記第１のケース体に対して位置決めされる。     The piezoelectric transformer device according to claim 17,
    The guide portion protrudes upward from the upper surface of the first case body, and
    The protruding portion protrudes downward from at least the lower surface of the second case body,
    In a state where the second piezoelectric transformer is loaded on the first piezoelectric transformer, the projecting portion is guided by the guide portion, so that the second case body is relative to the first case body. Positioned.
  19. 　請求項１７又は１８に記載の圧電トランス装置であって、
    　前記突出部及び前記導電部材は、前記第１及び第２のケース体にそれぞれ４箇所ずつ設けられており、
    　前記第１の圧電トランスは、
    　前記第１のケース体に形成された４箇所の前記突出部のうち、２箇所については前記第１の実装用端子及び第１の接続用端子が前記圧電体の２つの一次側電極にそれぞれ接続されるとともに、その他の２箇所では一方の前記第１の実装用端子及び第１の接続用端子が前記圧電体の二次側電極に接続され、その他方の前記第１の実装用端子及び第１の接続用端子が前記圧電体とは非接続であり、
    　前記第２の圧電トランスは、
    　前記第２のケース体に形成された４箇所の前記突出部のうち、２箇所については前記第２の実装用端子が前記圧電体の２つの一次側電極にそれぞれ接続されるとともに、その他の２箇所では一方の前記第２の実装用端子が前記圧電体とは非接触であり、その他方の前記第２の実装用端子が前記圧電体の二次側電極に接続されており、
    　前記第１の圧電トランス上に前記第２の圧電トランスを積載した状態で、
    　前記第２の圧電トランスについて前記圧電体の二次側電極に接続された他方の前記第２の実装用端子は、前記第１の圧電トランスについて前記圧電体とは非接続である他方の前記第１の接続用端子と接合されており、かつ、前記第２の圧電トランスについて前記圧電体の二次側電極とは非接続である一方の前記第２の実装用端子は、前記第１の圧電トランスについて前記圧電体の二次側電極に接続された一方の前記第１の接続用端子と接合されている。     The piezoelectric transformer device according to claim 17 or 18,
    The projecting portion and the conductive member are provided at four locations on the first and second case bodies, respectively.
    The first piezoelectric transformer is
    Of the four protrusions formed on the first case body, the first mounting terminal and the first connection terminal are connected to the two primary electrodes of the piezoelectric body at two positions, respectively. At the other two locations, one of the first mounting terminal and the first connection terminal is connected to the secondary electrode of the piezoelectric body, and the other of the first mounting terminal and the first connection terminal 1 connection terminal is not connected to the piezoelectric body,
    The second piezoelectric transformer is
    Of the four projecting portions formed on the second case body, the second mounting terminal is connected to the two primary electrodes of the piezoelectric body at two locations, and the other two In one place, one of the second mounting terminals is not in contact with the piezoelectric body, and the other second mounting terminal is connected to the secondary electrode of the piezoelectric body,
    With the second piezoelectric transformer being loaded on the first piezoelectric transformer,
    The other second mounting terminal connected to the secondary electrode of the piezoelectric body of the second piezoelectric transformer is not connected to the piezoelectric body of the first piezoelectric transformer. One of the second mounting terminals that is joined to one connection terminal and is not connected to the secondary electrode of the piezoelectric body with respect to the second piezoelectric transformer is the first piezoelectric transformer. The transformer is joined to one of the first connection terminals connected to the secondary electrode of the piezoelectric body.
  20. 　請求項９、１０、１１、１２、１４、１５、１７及び１８のいずれかに記載の圧電トランス装置であって、
    　前記第１及び第２のケース体は、外側から視認可能な位置に互いの組み付け方向を指示する指示手段を有する。     A piezoelectric transformer device according to any one of claims 9, 10, 11, 12, 14, 15, 17, and 18.
    The first and second case bodies have instruction means for instructing the assembling direction of each other at a position visible from the outside.
  21. 　請求項７に記載の圧電トランス装置であって、
    　前記第１及び第２のケース体は、外側から視認可能な位置に互いの組み付け方向を指示する指示手段を有する。     The piezoelectric transformer device according to claim 7,
    The first and second case bodies have instruction means for instructing the assembling direction of each other at a position visible from the outside.
  22. 　請求項１３に記載の圧電トランス装置であって、
    　前記第１及び第２のケース体は、外側から視認可能な位置に互いの組み付け方向を指示する指示手段を有する。     The piezoelectric transformer device according to claim 13,
    The first and second case bodies have instruction means for instructing the mutual assembling directions at positions that are visible from the outside.
  23. 　請求項１６に記載の圧電トランス装置であって、
    　前記第１及び第２のケース体は、外側から視認可能な位置に互いの組み付け方向を指示する指示手段を有する。     The piezoelectric transformer device according to claim 16,
    The first and second case bodies have instruction means for instructing the assembling direction of each other at a position visible from the outside.
  24. 　請求項１９に記載の圧電トランス装置であって、
    　前記第１及び第２のケース体は、外側から視認可能な位置に互いの組み付け方向を指示する指示手段を有する。     The piezoelectric transformer device according to claim 19,
    The first and second case bodies have instruction means for instructing the assembling direction of each other at a position visible from the outside.
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JP2006108332A (en) * 2004-10-04 2006-04-20 Tamura Seisakusho Co Ltd Piezoelectric transformer
JP2006303445A (en) * 2005-03-24 2006-11-02 Ngk Spark Plug Co Ltd Multilayer piezoelectric element and fuel injector using the same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014135345A (en) * 2013-01-09 2014-07-24 Tamura Seisakusho Co Ltd Piezoelectric transformer

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