Thin-type phone receiver

1. A thin-type phone receiver, comprising:

a housing, having a mounting cavity;

a vibration membrane assembly, comprising:

a frame sealedly fixed on the housing wherein a mounting area is formed by a part of a side wall of the frame and an inner wall of the housing,

a diaphragm at least partially made of soft magnetic material and fixed on the frame with one end of the diaphragm hanging in an inner space of the frame, and

a sealing membrane;

a coil, sealedly fixed in the mounting area and sealedly sleeved on the frame,

wherein the vibration membrane assembly separates the mounting cavity into a first cavity and a second cavity that are arranged side by side and separate from each other;

wherein the vibration membrane assembly separates the mounting cavity into a first cavity and a second cavity that are arranged side by side and not communicated with each other;

the diaphragm comprises a first portion fixed on the frame and extending into the inner hole of the coil, and a second portion formed on the first portion and hanging outside the coil,

wherein the second portion has a width in a radial direction of the coil larger than that of the first portion, and

wherein a first gap is formed between the diaphragm and the frame, and the sealing membrane sealedly covers an entirety of the first gap, such that the first portion of the diaphragm extending into the inner hole of the coil can generate vibration.

2. The thin-type phone receiver according to claim 1 , wherein the second portion has a thickness not equal to that of the first portion.

3. The thin-type phone receiver according to claim 1 , wherein the second portion is provided with a regulating aperture extending in the same direction as the first gap.

4. The thin-type phone receiver according to claim 1 , wherein the frame comprises:

a first mounting segment sealedly fixed in the inner hole of the coil and forming the mounting area with the housing, and

a second mounting segment placed outside the coil and fixed on the first mounting segment,

wherein, the second mounting segment has a width in a radial direction of the coil larger than that of the first mounting segment, one end of the coil facing the second mounting segment is sealedly fixed on the second mounting segment, and the coil is sealedly fixed to the housing.

5. The thin-type phone receiver according to claim 4 , wherein the frame also comprises a first extension part bending towards the second cavity and arranged on at least one end of the second mounting segment, wherein the first extension part is sealedly fixed to an inner hole wall of the coil.

6. The thin-type phone receiver according to claim 4 , wherein the frame also comprises at least two support parts formed on an end portion of the second mounting segment for fixing the first mounting segment and located on both sides of the first mounting segment,

wherein the support parts are fixed on the housing and surround the mounting area with the first mounting segment, an outer wall of the coil is fixed on the support parts.

7. The thin-type phone receiver according to claim 4 , wherein the coil is fixed by sealant adhesive to the second mounting segment, the first mounting segment and the housing.

8. The thin-type phone receiver according to claim 1 , wherein the diaphragm comprises:

a diaphragm body with one end formed on the frame and the other end hanging in the inner space of the frame; and

at least one spring plate, fixed on the diaphragm body, made of soft magnetic material and extending on the diaphragm body at least from an inner hole of the coil in an extending direction of the first gap,

wherein, the diaphragm body is made of non-magnetic-conducting material, and the sealing membrane is fixed on the diaphragm body and the frame.

9. The thin-type phone receiver according to claim 1 , wherein the housing comprises:

a first casing and a second casing with mutually buckled openings; and

the frame is clamped and fixed between the openings of the first casing and the second casing.

10. The thin-type phone receiver according to claim 1 , wherein:

at least one reinforcing rib is provided on one side surface of the diaphragm; and/or

the sealing membrane is spreading and fixed on the frame and the diaphragm.

11. The thin-type phone receiver according to claim 1 , wherein at least one positioning part is provided on an inner hole wall of the coil, and the coil is sleeved on the frame through the positioning part.

12. The thin-type phone receiver according to claim 11 , wherein the positioning part is a groove recessed inward on the inner hole wall of the coil; and a lateral end of the frame is embedded in the groove adjacent thereto.

13. The thin-type phone receiver according to claim 12 , wherein:

the groove has a U-shaped cross section or a V-shaped cross section; or

the groove has a cross-section including a U-shaped part and an inverted-trapezoidal-shaped part joined to an opening of the U-shaped part, and a longer edge side of the inverted-trapezoidal-shaped part forms a groove opening of the groove.

14. The thin-type phone receiver according to claim 11 , wherein comprising two of the positioning parts symmetrically disposed on the inner hole wall of the coil.