Earphones
The present disclosure provides an earphone comprising a sound production component and a suspension structure. The sound production component includes a diaphragm and a housing. In a wearing state, the suspension structure is used to place the sound production component at a position near but not blocking an ear canal, wherein an inner side surface of the housing facing an auricle is provided with a sound outlet, at least another side surface of the housing is provided with a first pressure relief hole, and a distance between a center of the sound outlet and a midpoint of an upper boundary of the inner side surface is greater than a distance between a center of the first pressure relief hole and the midpoint of the upper boundary of the inner side surface.
1. An earphone, comprising:
a sound production component including:
a transducer including a diaphragm used to produce a sound under an action of an excitation signal; and
a housing, the housing forming a cavity used to accommodate the transducer; and
a suspension structure, wherein in a wearing state, the suspension structure is used to place the sound production component at a position near but not blocking an ear canal, wherein
an inner side surface of the housing facing an auricle is provided with a sound outlet that is configured to transmit a sound generated at a front side of the diaphragm to the ear canal,
at least another side surface of the housing is provided with a first pressure relief hole that is configured to guide a sound generated at a rear side of the diaphragm out of the housing, and
a distance between a center of the sound outlet and a midpoint of an upper boundary of the inner side surface is greater than a distance between a center of the first pressure relief hole and the midpoint of the upper boundary of the inner side surface.
2. The earphone of claim 1 , wherein a ratio of the distance between the center of the sound outlet and the midpoint of the upper boundary of the inner side surface to the distance between the center of the first pressure relief hole and the midpoint of the upper boundary of the inner side surface is in a range of 1.3 to 2.1.
3. The earphone of claim 1 , wherein a ratio of a ratio of an area of the sound outlet to a depth of the sound outlet to a ratio of an area of the first pressure relief hole to a depth of the first pressure relief hole is in a range of 1.10 to 1.75.
4. The earphone of claim 1 , wherein a ratio of an area of the sound outlet to an area of the first pressure relief hole is in a range of 0.5 to 1.5.
5. The earphone of claim 1 , wherein in the wearing state, a ratio of a distance between a projection point of the center of the sound outlet on a sagittal plane and a centroid of a projection of an ear canal opening of the ear canal on the sagittal plane to a distance between a projection point of the center of the first pressure relief hole on the sagittal plane and the centroid of the projection of the ear canal opening on the sagittal plane is in a range of 0.10-0.35.
6. The earphone of claim 1 , wherein the suspension structure includes an ear hook, in the wearing state,
a first portion of the ear hook is hung between an ear and a head of a user,
a second portion of the ear hook extends towards a side of the auricle away from the head and connects to the sound production component, and
a ratio of a distance between the center of the sound outlet and an upper vertex of the ear hook to a distance between the center of the first pressure relief hole and the upper vertex of the ear hook is in a range of 1.10 to 1.70.
7. The earphone of claim 1 , wherein the transducer further includes a magnetic circuit assembly, the magnetic circuit assembly is used to provide a magnetic field, and an absolute value of a difference between a distance between the center of the sound outlet and a long-axis center plane of the magnetic circuit assembly and a distance between the center of the first pressure relief hole and the long-axis center plane is in a range of 4.0 mm to 6.1 mm.
8. The earphone of claim 7 , wherein a difference between a distance between the center of the sound outlet and a bottom surface of the magnetic circuit assembly and a distance between the center of the first pressure relief hole and the bottom surface of the magnetic circuit assembly is in a range of 3.65 mm to 7.05 mm.
9. The earphone of claim 1 , wherein the at least another side surface of the housing is further provided with a second pressure relief hole, and an area of the first pressure relief hole is larger than an area of the second pressure relief hole.
10. The earphone of claim 9 , wherein a distance from the center of the sound outlet to a perpendicular bisection-plane of a line segment connecting the center of the first pressure relief hole and a center of the second pressure relief hole is in a range of 0 mm-2 mm.
11. The earphone of claim 10 , wherein the first pressure relief hole is provided on an upper side surface of the housing and the second pressure relief hole is provided on a lower side surface of the housing.
12. The earphone of claim 9 , wherein, in the wearing state, a ratio of a distance between a projection point of the center of the sound outlet on a sagittal plane and a projection point of a ⅓ point of an lower boundary of the inner side surface on the sagittal plane to a distance between a projection point of the center of the second pressure relief hole on the sagittal plane and the projection point of the ⅓ point of the lower boundary of the inner side surface on the sagittal plane is in a range of 0.65-1.05.
13. The earphone of claim 9 , wherein an angle between a line connecting the center of the sound outlet to the center of the first pressure relief hole and a line connecting the center of the sound outlet to the center of the second pressure relief hole is in a range of 46.40° to 114.04°.
14. The earphone of claim 9 , wherein a ratio of a distance between the center of the sound outlet and the center of the first pressure relief hole to a distance between the center of the sound outlet and the center of the second pressure relief hole is in a range of 0.9 to 1.1.
15. The earphone of claim 9 , wherein a ratio of the area of the sound outlet to a total area of the first pressure relief hole and the second pressure relief hole is in a range of 0.1 to 0.99.
16. The earphone of claim 15 , wherein the diaphragm divides the cavity into a front cavity and a rear cavity corresponding to the front side and the rear side of the diaphragm, respectively, wherein a ratio of a resonance frequency of the front cavity to a resonance frequency of the rear cavity is in a range of 0.1 to 5.
17. The earphone of claim 9 , wherein a ratio of the area of the sound outlet to a total area of the first pressure relief hole and the second pressure relief hole is in a range of 1 to 10.
18. The earphone of claim 17 , wherein the diaphragm divides the cavity into a front cavity and a rear cavity corresponding to the front side and the rear side of the diaphragm, respectively, wherein a ratio of a resonance frequency of the front cavity to a resonance frequency of the rear cavity is in a range of 0.5 to 10.
19. The earphone of claim 9 , wherein a ratio of a sound pressure at the sound outlet to a total sound pressure at the first pressure relief hole and at the second pressure relief hole is in a range of 0.4 to 0.6.
20. The earphone of claim 9 , wherein a ratio of a difference between the area of the first pressure relief hole and the area of the second pressure relief hole to the area of the sound outlet is in a range of 2.5 to 3.9.