Waterproof vibration transducer module
By using a combination of substrate and bracket to clamp the barrier diaphragm, the deviation problem caused by adhesive overflow during the manufacturing process of existing waterproof vibration transducer modules is solved, achieving higher waterproof performance and sealing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HOSIDEN CORP
- Filing Date
- 2025-11-27
- Publication Date
- 2026-05-29
AI Technical Summary
Existing waterproof vibration transducer modules are prone to deviations during manufacturing due to adhesive overflow and other reasons.
The system employs a combined structure consisting of a substrate, a support, a barrier diaphragm, a first housing, and a second housing. The substrate holds the barrier diaphragm between protrusions and ribs of the support. The internal space is divided into two spaces by the support and the barrier diaphragm, and the combined housing achieves sealing.
It effectively avoids deviations in the manufacturing process, improves waterproof performance and sealing effect, and is suitable for high-pressure cleaning environments.
Smart Images
Figure CN122120656A_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to a waterproof vibration transducer module. Background Technology
[0002] As an example of an existing waterproof vibration transducer module, there is Patent Document 1 (Japanese Patent Application Publication No. 2022-118886).
[0003] The waterproof vibration transducer module of Patent Document 1 adheres and fixes the waterproof vibration membrane to the lower surface of the housing.
[0004] When the waterproof vibration membrane is bonded and fixed to the shell as in Patent Document 1, deviations are prone to occur during manufacturing due to reasons such as adhesive overflow. Summary of the Invention
[0005] Therefore, the purpose of this disclosure is to provide a waterproof vibration transducer module that is less prone to manufacturing deviations.
[0006] The waterproof vibration transducer module of the present invention includes a substrate, a bracket, a barrier diaphragm, a first housing, and a second housing.
[0007] The substrate includes a through hole, a protrusion disposed on one side in a manner surrounding the through hole, and a vibration conversion chip mounted on the other side in a manner blocking the through hole.
[0008] The support includes holes and ribs in the location surrounding the holes.
[0009] When viewed in the stacking direction, the barrier diaphragm is positioned overlapping with the through-holes and pores, held between protrusions and ribs, and vibrates within the space formed by the pores and protrusions.
[0010] The first shell has a sound hole.
[0011] The second housing is combined with the first housing.
[0012] The internal space formed by combining the first and second housings contains a substrate, a support, and a barrier membrane. The internal space is divided into two spaces by the support and the barrier membrane, and the space on the second housing side is sealed.
[0013] Invention Effects
[0014] The waterproof vibration transducer module according to the present invention is less prone to manufacturing deviations. Attached Figure Description
[0015] Figure 1 This is a top view of the waterproof vibration transducer module of Example 1.
[0016] Figure 2 This is a perspective view of the waterproof vibration transducer module of Example 1.
[0017] Figure 3 This is an exploded perspective view of the waterproof vibration transducer module of Example 1.
[0018] Figure 4 This is an exploded perspective view of the waterproof vibration transducer module of Example 1.
[0019] Figure 5 This is a CC cross-sectional view of the waterproof vibration transducer module of Example 1. Detailed Implementation
[0020] The embodiments of this disclosure will now be described in detail. Furthermore, structural parts with the same function will be labeled with the same reference numerals, and repeated descriptions will be omitted.
[0021] [Example 1]
[0022] The following is for reference Figures 1-5 The structure of the waterproof vibration transducer module in Example 1 is described.
[0023] The waterproof vibration transducer module 1 of this embodiment includes a substrate 2, a bracket 3, a barrier diaphragm 4, a first housing 5, a second housing 6, and a connector 7.
[0024] exist Figures 1-5 In programming, the x-axis, y-axis, and z-axis are defined to represent direction. For example... Figure 1 As shown, the direction from the first housing 5 toward the connector 7 is defined as the +x direction, and the opposite direction of the +x direction is defined as the -x direction. Figure 2 As shown, the direction from the second housing 6 toward the first housing 5 is taken as the +z direction, the opposite direction of the +z direction is taken as the -z direction, the direction perpendicular to the (+ / -)x direction and the (+ / -)z direction is taken as the (+ / -)y direction, the left direction when moving toward the +x direction is taken as the +y direction, and the opposite direction of the +y direction is taken as the -y direction.
[0025] like Figure 3 As shown, the substrate 2 includes: a through hole 21 penetrating the substrate 2; a protrusion 22 disposed on one side (the side in the +z direction) surrounding the through hole 21; and as shown in the figure. Figure 4 The vibration conversion chip 23 is shown mounted on its other side (the side in the -z direction) by blocking the through-hole 21. The substrate 2 can also be, for example, a generally rectangular plate shape. Figure 3 As shown, the protrusion 22 can also be formed in an annular shape to surround the through hole 21. For example, it is more preferable if the protrusion 22 is an annular shape with an inner diameter of φ8-12mm and a height of 0.02-0.08mm.
[0026] Additionally, substrate 2 may also include a notch filter (not shown) that cuts off a predetermined frequency of the output signal from vibration conversion chip 23, and an amplifier circuit (not shown) that adjusts the level of the output signal from vibration conversion chip 23. By correcting the peaks in the frequency response caused by the effect of the blocking diaphragm 4 with a notch filter, a flat frequency response can be obtained over a wide frequency band. This ensures water resistance and allows for compliance with specifications such as CarPlay (registered trademark), i.e., Fullband (50Hz-16kHz).
[0027] like Figure 3 As shown, the bracket 3 includes a hole 31 and a rib 32 surrounding the hole 31. The hole 31 may also be circular. The hole 31 is preferably formed such that its inner diameter is larger than that of the through hole 21.
[0028] like Figure 3 , Figure 4 As shown, rib 32 can be provided not only at the position surrounding the hole 31, but also at the ends of the bracket 3 in the + / -x and + / -y directions, and on both sides of the bracket 3 (the side in the +z direction) and the other side (the side in the -z direction). Ribs 32 provided at the position surrounding the hole 31 help to prevent the diaphragm 4 from being fixed and to form a sealing structure (closed structure), while ribs 32 provided at the ends of the bracket 3 help to form a sealing structure (closed structure).
[0029] like Figure 5 As shown, the upper and lower ribs 32 on the outer side of the bracket 3 (the ribs 32 located on the + / -y side) are clamped by the first housing 5 and the second housing 6 to seal their contact parts, preventing water from entering the space B where the vibration conversion chip 23 is disposed.
[0030] In addition, the upper and lower ribs 32 on the inner side are held by the first housing 5 and the diaphragm 4, and their contact parts are sealed to prevent water from entering the space B where the vibration conversion chip 23 is disposed.
[0031] Therefore, if the support 3 (especially the rib 32) is an elastomer with moderate hardness, the sealing performance is increased, and thus it is more preferable. For example, it is further preferred that the support 3 is made of raw materials with a Shore hardness of D40-D70.
[0032] like Figure 3 As shown, when viewed in the stacking direction (z-axis direction), the barrier diaphragm 4 is located at the position overlapping with the through hole 21 and the hole 31. Its end is held by the protrusion 22 and the rib 32, and vibrates in the +z / -z direction in the space (gap) formed by the hole 31 and the protrusion 22.
[0033] The barrier diaphragm 4 can be formed of, for example, SUS material. Alternatively, the barrier diaphragm 4 is more preferably a circular shape with an outer diameter of φ10-φ16 mm and a thickness of 0.01-0.03 mm.
[0034] In this embodiment, the waterproof vibration transducer module 1 is not bonded and fixed to the housing as in Patent Document 1, but is instead clamped and fixed by the rib 32 of the bracket 3 and the protrusion 22 of the substrate 2. Therefore, it has the advantage of being less prone to manufacturing deviations.
[0035] like Figure 4 As shown, the first housing 5 may be, for example, a generally cuboid-shaped housing with an opening in the -z direction. A sound hole 51 is formed on the +z side of the first housing 5.
[0036] like Figure 3 As shown, it is preferable that the cover portion 52 of the sound hole 51 covers the hole 31 when viewed in the stacking direction (z-axis direction). For example, it is more preferable if the hole 31 is covered by more than 90% when viewed through the cover portion 52 in the stacking direction (z-axis direction).
[0037] As another manifestation of the cover 52, the sound hole 51 can also be formed as an annular slit whose center is the same as the center of the hole 31 when viewed in the stacking direction (z-axis direction).
[0038] By forming a cover 52, or by forming a sound hole 51 as an annular slit whose center is the same as the center of the hole 31 when viewed in the stacking direction (z-axis direction), it is possible to prevent jets during high-pressure cleaning from passing through the sound hole 51 and directly impacting the barrier diaphragm 4. As a result, it is possible to prevent water from entering the space B by the gap between the support 3 and the barrier diaphragm 4 being pushed open by water pressure, thus improving the waterproof performance.
[0039] like Figure 5 As shown, the sound hole 51 can also be formed to penetrate the first housing 5 at an angle different from the stacking direction (+ / -z direction) (in the example of this figure, it is oblique lower left or oblique lower right). By forming the sound hole 51 to penetrate the first housing 5 at an angle different from the stacking direction (+ / -z direction), it is possible to prevent the jets during high-pressure cleaning from directly impacting the diaphragm 4.
[0040] The second housing 6 is combined with the first housing 5. For example... Figure 3 As shown, the second housing 6 can be configured as a cuboid shape with an opening in the +z direction, for example. Additionally, the second housing 6 may also include a terminal 61 and a wire 62 that are electrically connected to the substrate 2. The -x end of the wire 62 is connected to the terminal 61, and the +x end is connected to the connector 7.
[0041] Terminal 61 and wire 62 are preferably integrally formed with the second housing 6. By integrally forming terminal 61 and wire 62 with the second housing 6, terminal 61 and wire 62 are also waterproof, and the overall waterproof performance of the module is improved.
[0042] like Figure 5As shown, the substrate 2, the support 3, and the barrier membrane 4 are housed in the internal space formed by the combination of the first housing 5 and the second housing 6. As shown in the figure, the internal space is divided into two spaces (A and B) by the support 3 and the barrier membrane 4, and the space B on the side of the second housing 6 is sealed.
[0043] The waterproof vibration transducer module 1 of this embodiment can be used, for example, for microphones that require waterproofing, microphones that require flat frequency characteristics over a wide bandwidth, microphones that require a high signal-to-noise ratio, and microphones that require high-pressure cleaning.
Claims
1. A waterproof vibration transducer module, characterized in that, include: A substrate includes a through hole, a protrusion disposed on one side to surround the through hole, and a vibration conversion chip mounted on the other side to block the through hole. A support, comprising a hole and ribs surrounding the hole; A blocking diaphragm, which, when viewed in the stacking direction, is located at a position overlapping with the through-hole and the hole, is held by the protrusion and the rib, and vibrates within the space formed by the hole and the protrusion; The first shell has a sound hole formed therein; A second housing, which is combined with the first housing; The substrate, the support, and the barrier membrane are housed in the internal space formed by combining the first and second housings. The internal space is divided into two spaces by the support and the barrier membrane, sealing the space on the second housing side.
2. The waterproof vibration transducer module according to claim 1, characterized in that, A cover is formed in the sound hole. When viewed in the stacking direction, the cover covers more than 90% of the hole.
3. The waterproof vibration transducer module according to claim 1, characterized in that, The sound hole is formed as a ring-shaped slit. When viewed in the stacking direction, the center of the slit is the same as the center of the hole.
4. The waterproof vibration transducer module according to claim 2 or 3, characterized in that, The sound hole penetrates the first housing at an angle different from the stacking direction.
5. The waterproof vibration transducer module according to claim 1, characterized in that, The second housing includes terminals and wires electrically connected to the substrate. The terminal and the wire are integrally formed with the second housing.
6. The waterproof vibration transducer module according to claim 1, characterized in that, The substrate includes: a notch filter for cutting off a specified frequency of the output signal from the vibration conversion chip; and an amplifier circuit for adjusting the level of the output signal from the vibration conversion chip.
7. The waterproof vibration transducer module according to claim 1, characterized in that, The protrusion is a ring-shaped part with an inner diameter of φ8-12mm and a height of 0.02-0.08mm.
8. The waterproof vibration transducer module according to claim 1, characterized in that, The barrier membrane is circular in shape with an outer diameter of φ10-16mm and a thickness of 0.01-0.03mm.
9. The waterproof vibration transducer module according to claim 1, characterized in that, The Shore hardness of the support is D40-D70.