US-20260129368-A1 - DIAPHRAGMS, AIR CONDUCTION SPEAKERS, AND WEARABLE ELECTRONIC DEVICES

US20260129368A1US 20260129368 A1US20260129368 A1US 20260129368A1US-20260129368-A1

Abstract

The present disclosure relates to a diaphragm, an air conduction speaker, and a wearable electronic device. The diaphragm includes a center main body and a folded ring. The folded ring is connected to an outer peripheral edge of the center main body. The folded ring includes two arcuate segments and two connecting segments. The two arcuate segments are spaced apart and disposed opposite to each other. The two connecting segments are spaced apart side-by-side and connected one-to-one between two pairs of opposite ends of the two arcuate segments. Each arcuate segment is provided with a plurality of first pattern grooves spaced apart from each other along an extension direction of the arcuate segment. The plurality of first pattern grooves are arranged in a radial arrangement along a same spiral direction.

Inventors

Guangyuan Zhu
Lei Zhang
Xin Qi
Shanyong Gu

Assignees

Shenzhen Shokz Co., Ltd.

Dates

Publication Date: 20260507
Application Date: 20251229

Claims (20)

1 . An air conduction speaker, comprising: a magnet assembly including a magnetic conduction shield, a magnet, and a magnetic conduction plate, wherein the magnet and the magnetic conduction plate are stacked and arranged in a preset vibration direction, the magnetic conduction shield surrounds the magnet and the magnetic conduction plate, a magnetic gap extending along the preset vibration direction is formed among the magnetic conduction shield, the magnet, and the magnetic conduction plate, and a ratio of a thickness of the magnetic conduction plate to a thickness of the magnet in the preset vibration direction is in a range of 0.1˜1; a diaphragm disposed opposite to the magnet assembly in the preset vibration direction; and a voice coil, wherein one end of the voice coil is fixedly connected to the diaphragm, and another end of the voice coil extends into the magnetic gap.
2 . The air conduction speaker according to claim 1 , wherein the ratio of the thickness of the magnetic conduction plate to the thickness of the magnet in the preset vibration direction is in a range of 0.2˜0.9.
3 . The air conduction speaker according to claim 1 , wherein the ratio of the thickness of the magnetic conduction plate to the thickness of the magnet in the preset vibration direction is in a range of 0.3˜0.8.
4 . The air conduction speaker according to claim 1 , wherein the magnetic conduction shield includes a cylindrical side plate and a base plate, the cylindrical side plate is connected to an outer peripheral edge of the base plate, the cylindrical side plate surrounds the magnet and the magnetic conduction plate, the magnetic conduction plate and the base plate are disposed on opposite sides of the magnet in the preset vibration direction, the magnetic conduction plate is closer to the diaphragm than the magnet, and a ratio of a thickness of the base plate to the thickness of the magnet in the preset vibration direction is in a range of 0.1˜0.9.
5 . The air conduction speaker according to claim 4 , wherein the ratio of the thickness of the base plate to the thickness of the magnet in the preset vibration direction is in a range of 0.2˜0.8.
6 . The air conduction speaker according to claim 4 , wherein the ratio of the thickness of the base plate to the thickness of the magnet in the preset vibration direction is in a range of 0.3˜0.7.
7 . The air conduction speaker according to claim 4 , wherein the magnetic conduction plate is provided with a first through-hole along the preset vibration direction; or the base plate is provided with a second through-hole along the preset vibration direction.
8 . The air conduction speaker according to claim 7 , wherein a center of the first through-hole and a center of the second through-hole are collinear in the preset vibration direction; and/or a projection of the first through-hole on the base plate along the preset vibration direction falls within the second through-hole.
9 . The air conduction speaker according to claim 4 , wherein the cylindrical side plate and the base plate are integrally molded, and a thickness of the cylindrical side plate is the same as a thickness of the base plate.
10 . The air conduction speaker according to claim 1 , wherein a thickness of the magnet is within a range from 0.5 mm to 3 mm.
11 . The air conduction speaker according to claim 1 , wherein a thickness of the magnet is within a range from 0.9 mm to 2.5 mm.
12 . The air conduction speaker according to claim 1 , wherein a thickness of the magnetic conduction plate is within a range from 0.3 mm to 1.7 mm.
13 . The air conduction speaker according to claim 1 , further comprising: a frame, wherein the frame is connected to a periphery of the magnetic conduction shield, one end of the frame extends beyond the magnetic conduction shield in the preset vibration direction, and an outer peripheral edge of the diaphragm is fixed to one end of the frame; and the frame is provided with an annular table surface, the air conduction speaker including an annular fixing member, the annular fixing member being fixedly connected to a side of an outer edge of the diaphragm facing the frame, a side of the annular fixing member away from the diaphragm being supported on the annular table surface, wherein the frame is recessed in the annular table surface to form a first annular adhesive groove, the first annular adhesive groove is configured to hold a fixing adhesive, and the annular fixing member covers the first annular adhesive groove.
14 . The air conduction speaker according to claim 13 , wherein the frame is recessed in the annular table surface to form a second annular adhesive groove, the second annular adhesive groove encloses the first annular adhesive groove, the second annular adhesive groove further connects to an outer peripheral wall of the frame connected to the annular table surface, the annular fixing member covers the second annular adhesive groove, and the second annular adhesive groove is visible from the outer peripheral wall of the frame.
15 . The air conduction speaker according to claim 13 , wherein the frame is further provided with an annular flange connected to an inner side of the annular table surface, and the first annular adhesive groove is located at a junction of the annular flange and the annular table surface.
16 . The air conduction speaker according to claim 1 , wherein a lower surface of the diaphragm towards the magnet assembly has a connecting position connected to one end of the voice coil, the magnet assembly has a top surface toward the diaphragm along the preset vibration direction, the diaphragm has a longest dimension in a direction perpendicular to the preset vibration direction, in a natural stationary state, there is a first spacing dimension between the connecting position and the top surface in the preset vibration direction, and a ratio of the first spacing dimension to the longest dimension is in a range of 0.1˜0.2.
17 . The air conduction speaker according to claim 16 , wherein the magnetic gap has a gap bottom surface away from the connecting position, in the natural stationary state, there is a third spacing dimension between the connecting position and the gap bottom surface in the preset vibration direction, and a ratio of the third spacing dimension to the longest dimension is in a range of 0.15˜0.4.
18 . The air conduction speaker according to claim 16 , wherein the diaphragm includes a folded ring and a center main body, the folded ring includes an inner ring folded edge and an outer ring folded edge, the outer ring folded edge surrounds the inner ring folded edge, the outer ring folded edge is fixed with respect to the frame, and the center main body includes a main body portion and an annular connecting edge connected to an outer peripheral edge of the main body portion, wherein the inner ring folded edge and the annular connecting edge are connected in a layered manner, the connecting position is located on a lower surface toward the voice coil of one of the inner ring folded edge and the annular connecting edge close to the voice coil; and an angle between the lower surface where the connecting position is located and the preset vibration direction is greater than or equal to 80° and less than or equal to 90°.
19 . A wearable electronic device, comprising a housing and an air conduction speaker, the air conduction speaker being provided in an interior of the housing, the air conduction speaker comprising: a magnet assembly including a magnetic conduction shield, a magnet, and a magnetic conduction plate, wherein the magnet and the magnetic conduction plate are stacked and arranged in a preset vibration direction, the magnetic conduction shield surrounds the magnet and the magnetic conduction plate, a magnetic gap extending along the preset vibration direction is formed among the magnetic conduction shield, the magnet, and the magnetic conduction plate, and a ratio of a thickness of the magnetic conduction plate to a thickness of the magnet in the preset vibration direction is in a range of 0.1˜1; a diaphragm disposed opposite to the magnet assembly in the preset vibration direction; and a voice coil, wherein one end of the voice coil is fixedly connected to the diaphragm, and another end of the voice coil extends into the magnetic gap.
20 . The wearable electronic device according to claim 19 , wherein the wearable electronic device includes a bone conduction speaker, the bone conduction speaker being disposed in the interior of the housing and spaced apart from the air conduction speaker.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Patent Application No. PCT/CN2023/140260, filed on Dec. 20, 2023, the contents of which are hereby incorporated by reference. TECHNICAL FIELD The present disclosure relates to the technical field of sound-emitting apparatus, and in particular to a diaphragm, an air conduction speaker, and a wearable electronic device. BACKGROUND With the continuous popularization of wearable electronic devices, they have become indispensable social and entertainment tools in people's daily lives. Wearable electronic devices such as headphones and smart glasses have also been widely used in people's daily life, which can be used in conjunction with cell phones, computers, and other terminal devices to facilitate the provision of auditory feast for users. Thus, how to enhance the working life of wearable electronic devices, such as headphones, is an urgent problem at present SUMMARY The present disclosure provides a diaphragm, comprising: a center main body; and a folded ring connected to an outer peripheral edge of the center main body. The folded ring includes two arcuate segments and two connecting segments, the two arcuate segments are spaced apart and disposed opposite to each other, and the two connecting segments are disposed spaced apart side-by-side and connected one-to-one between two pairs of opposite ends of the two arcuate segments. Each arcuate segment of the two arcuate segments is provided with a plurality of first pattern grooves spaced apart from each other in an extension direction of the arcuate segment, two ends of each first pattern groove extend towards an inner ring and an outer ring of the folded ring, respectively, and the plurality of first pattern grooves are arranged in a radial arrangement along a same spiral direction. In some embodiments, a depth of each first pattern groove decreases gradually towards the two ends of the first pattern groove, and a width of a groove opening of the first pattern groove decreases gradually towards the two ends of the first pattern groove. In some embodiments, a maximum depth of the first pattern groove is in a range of 0.06 mm˜0.1 mm, and a maximum width of the groove opening of the first pattern groove is in a range of 0.14 mm˜0.18 mm. In some embodiments, a ratio of a depth of each first pattern groove at any position to a width of a groove opening of the first pattern groove is in a range of 0.5˜4. In some embodiments, a groove wall of each first pattern groove includes a curved bottom wall and two side walls disposed opposite to each other, the curved bottom wall is connected between the two side walls and is disposed in a curved depression in a direction away from a groove opening of the first pattern groove, and the curved bottom wall and the two side walls are smoothly connected. In some embodiments, an angle between the two side walls is in a range of 50° ˜120°, or a range of 60° to 100°. In some embodiments, the folded ring includes an inner ring folded edge, an outer ring folded edge, and an annular curved portion connected between the inner ring folded edge and the outer ring folded edge. The inner ring folded edge is connected to the center main body, and the plurality of first pattern grooves are opened in the annular curved portion and located in the annular curved portion at a position corresponding to an arcuate segment of the two arcuate segments. Each first pattern groove has a first end proximate to the inner ring folded edge and a second end proximate to the outer ring folded edge, and a distance between the first end and the inner ring folded edge is less than a distance between the second end and the outer ring folded edge. In some embodiments, the folded ring has a long axis direction and a short axis direction perpendicular to each other, the two connecting segments extend along the long axis direction and are spaced apart along the short axis direction, on a reference plane defined by the long axis direction and the short axis direction, each first pattern groove has a first projection, and an inner edge of the folded ring has a second projection, the second projection and an extension line of the first projection have an intersection point on the reference plane, and at the intersection point, an angle between the extension line of the first projection and a tangent line of the second projection is greater than or equal to 30° and less than 90°. In some embodiments, the angle corresponding to the first pattern groove decreases gradually along a direction from a middle point of an arcuate segment of the two arcuate segments towards each end of the arcuate segment. The angle corresponding to the first pattern groove closer to the middle point of the arcuate segment is larger, and the angle corresponding to the first pattern groove closer to each end of the arcuate segment is smaller. In some embodiments, the plurality of first pattern grooves of th