JP-7856389-B2 - Audio devices

JP7856389B2JP 7856389 B2JP7856389 B2JP 7856389B2JP-7856389-B2

Inventors

滝辰哉

Assignees

ＴＤＫ株式会社

Dates

Publication Date: 20260511
Application Date: 20210507

Claims (6)

Piezoelectric vibrator and A vibrating panel that vibrates using a piezoelectric vibrator, A housing is configured to define an internal space together with the vibration panel, and to form a gap between it and the end of the vibration panel , An acoustic device comprising a partition positioned opposite the vibration panel and dividing the internal space into multiple spaces, The partition has at least one through-hole that connects the multiple spaces, The vibration panel has an outer main surface and an inner main surface that face each other, The aforementioned outer main surface faces the external space of the acoustic device, The aforementioned inner main surface faces the aforementioned internal space. Audio device.
The piezoelectric vibrator is arranged on the vibration panel, The partition has a region in which at least one through hole is formed, and this region faces the piezoelectric vibrator. The acoustic device according to claim 1.
The partition has a plurality of through holes, including at least one through hole. The acoustic device according to claim 1 or 2.
The piezoelectric vibrator is arranged on the inner main surface, The acoustic device according to any one of claims 1 to 3.
The partition divides the internal space into two spaces. The housing comprises a frame that defines one of the two spaces together with the vibration panel, and a base that defines the other of the two spaces. The base portion includes a bottom wall and side walls extending in a direction intersecting the bottom wall. The partition has a flat plate shape and is positioned on the end face of the side wall. The frame is positioned on the partition such that it sandwiches the partition between its end face and the partition. The acoustic device according to any one of claims 1 to 4.
The frame has through holes through which wiring electrically connected to the piezoelectric vibrator is inserted. The acoustic device according to claim 5.

Description

This disclosure relates to an acoustic device. Acoustic devices comprising a piezoelectric vibrator and a vibrating panel that vibrates due to the piezoelectric vibrator are known (for example, Patent Document 1). Japanese Patent Application Publication No. 04-70100 Figure 1 is a perspective view showing an acoustic device according to this embodiment.Figure 2 is an exploded perspective view showing the acoustic device according to this embodiment.Figure 3 shows the cross-sectional configuration of the acoustic device according to this embodiment.Figure 4 is a plan view showing the acoustic device according to this embodiment.Figure 5 is an enlarged view showing the gap between the vibration panel and the frame.Figure 6 shows the cross-sectional configuration of the acoustic device according to the first modified example.Figure 7 shows the cross-sectional configuration of the acoustic device according to the second modified example. The embodiments of the present invention will be described in detail below with reference to the attached drawings. In this description, the same reference numerals will be used for elements that are identical or have the same function, and redundant explanations will be omitted. The configuration of the acoustic device 1 according to this embodiment will be described with reference to Figures 1 to 4. Figure 1 is a perspective view showing the acoustic device 1 according to this embodiment. Figure 2 is an exploded perspective view showing the acoustic device 1 according to this embodiment. Figure 3 is a diagram showing the cross-sectional configuration of the acoustic device 1 according to this embodiment. The cross-section shown in Figure 3 is a cross-section obtained when the acoustic device 1 according to this embodiment is cut along the line III-III shown in Figure 1. Figure 4 is a plan view showing the acoustic device 1 according to this embodiment. Figure 4 is a view of the acoustic device 1 as seen from the piezoelectric vibrator 2 side, and the multiple through holes 67 located inside the acoustic device 1 are shown by dashed lines. In reality, the multiple through holes 67 cannot be seen from the outside of the acoustic device 1. The acoustic device 1 comprises a piezoelectric vibrator 2, a vibration panel 3, a housing 4 that defines the internal space 80 together with the vibration panel 3, and partitions 6 that divide the internal space 80 into multiple spaces. The piezoelectric vibrator 2 is arranged on the vibration panel 3. The acoustic device 1 functions, for example, as a speaker. The acoustic device 1 has a roughly rectangular parallelepiped shape. In this embodiment, the "rectangular parallelepiped shape" includes rectangular parallelepiped shapes with chamfered corners and edges, and rectangular parallelepiped shapes with rounded corners and edges. Hereinafter, the longitudinal direction of the acoustic device 1 will be referred to as direction X, the short direction as direction Y, and the thickness direction as direction Z. In this embodiment, directions X, Y, and Z are orthogonal to each other. In direction Z, the direction from the partition 6 toward the piezoelectric vibrator 2 will be referred to as the upward direction, and the opposite direction will be referred to as the downward direction. As an example, the width of the acoustic device 1 in direction X may be 100 mm, the width in direction Y may be 50 mm, and the thickness in direction Z may be 40 mm. The piezoelectric vibrator 2 vibrates when a voltage is applied. In this embodiment, the piezoelectric vibrator 2 is a multilayer piezoelectric element. The piezoelectric vibrator 2 may also be a bimorph piezoelectric element. The piezoelectric vibrator 2 has a substantially rectangular parallelepiped shape. As shown in Figure 3, the piezoelectric vibrator 2 has a pair of main surfaces 21 and 22 that face each other in direction Z. Main surface 21 is located above main surface 22 in direction Z. The piezoelectric vibrator 2 is arranged on the outer main surface 31 of the vibration panel 3, which will be described later. In this embodiment, when it is stated that one element is arranged on another element, that element may be directly arranged on the other element or indirectly arranged on the other element. Direct arrangement of an element means that there is no intervening element between the element and the other element. Indirect arrangement of an element means that there is an intervening element between the element and the other element. The piezoelectric vibrator 2 is bonded to the vibration panel 3 via an adhesive layer. Each main surface 21, 22 has a rectangular shape when viewed from direction Z. In this embodiment, "rectangular shape" includes rectangular shapes with chamfered corners and rectangular shapes with rounded corners. Each main surface 21, 22 has a pair of long sides and a pair of short sides. The piezoelectric vibrator 2 is arranged on the vibration panel 3 such that the long side