A receiver

Abstract

The present invention provides a receiver, which includes: a housing having a first hollow inner cavity; a positioning bracket sleeved in the first hollow inner cavity of the housing, the positioning bracket including a top port, a bottom port, a second side wall and a second hollow inner cavity surrounded by the second side wall, and a first positioning structure is provided inside the positioning bracket; a motor assembly placed in the second hollow inner cavity of the positioning bracket, and the motor assembly is positioned and fixed by the first positioning structure. Compared with the prior art, in the present invention, a positioning bracket is additionally provided in the box body, which is used to position and fix the motor, and a stacked assembly is adopted during assembly, so as to not only solve the problem of motor positioning, but also facilitate the realization of automated production.

Description

Technical Field

[0001] The present invention belongs to the technical field of electroacoustic conversion, and particularly relates to the design of a novel moving iron receiver with a positioning bracket.

Background Art

[0002] A receiver, also called an earpiece, is an electroacoustic device that converts an audio electrical signal into a sound signal under the condition of no sound leakage, and is widely used in communication terminal devices such as mobile phones, fixed telephones, and hearing aids to achieve audio playback.

[0003] In the existing moving iron receiver, when the motor is assembled into the iron box, it needs to be positioned by an external positioning mechanism, resulting in low production efficiency and difficulty in achieving automation.

[0004] Therefore, it is necessary to propose an improved technical solution to overcome the above problems.

Summary of the Invention

[0005] The purpose of the present invention is to provide a receiver that not only solves the problem of motor positioning but also facilitates automated production.

[0006] According to one aspect of the present invention, there is provided a receiver, which includes: a housing having a first hollow inner cavity; a positioning bracket sleeved in the first hollow inner cavity of the housing, the positioning bracket including a top port, a bottom port, a second side wall, and a second hollow inner cavity surrounded by the second side wall, and a first positioning structure is provided inside the positioning bracket; a motor assembly placed in the second hollow inner cavity of the positioning bracket, and the first positioning structure positions and fixes the motor assembly.

[0007] Further, the first positioning structure is provided on the inner wall of the side wall on the top port side of the positioning bracket; the receiver further includes a diaphragm assembly located inside the housing and placed on the bottom port side of the positioning bracket.

[0008] Further, the housing is a hollow cylinder with a top opening, the housing includes a bottom surface and a first side wall, and the bottom surface and the first side wall enclose the first hollow inner cavity; the top port of the positioning bracket is adjacent to the top opening of the housing, and the bottom port of the positioning bracket is adjacent to the bottom surface of the housing.

[0009] Further, a second positioning structure is also provided inside the positioning bracket, the second positioning structure is provided on the inner wall of the side wall on the bottom port side of the positioning bracket, the diaphragm assembly is placed in the second hollow inner cavity of the positioning bracket, and the second positioning structure positions and fixes the diaphragm assembly.

[0010] Further, the first positioning structure is a card slot. When the motor assembly is assembled to the positioning bracket, the magnet frame is exactly snapped into the card slot; the second positioning structure is a groove, and the diaphragm assembly is placed in the groove.

[0011] Further, the receiver further includes a gasket. The gasket is located in the first cavity of the housing and is placed on the bottom surface of the housing; the diaphragm assembly is clamped between the gasket and the bottom port of the positioning bracket.

[0012] Further, the positioning bracket is made of plastic material by injection molding; the housing is made of metal material by a stretching process.

[0013] Further, the receiver further includes a driving rod located in the housing. One end of the driving rod is connected to the motor assembly, and the other end is connected to the diaphragm assembly; the motor assembly includes a magnet frame, a first magnet, a second magnet, a coil, and a U-shaped armature. The first magnet and the second magnet are fixed in the inner cavity of the magnet frame, and the first magnet and the second magnet are opposite and spaced from each other; the U-shaped armature includes a vibrating part, a fixing part, and a bending part. Its fixing part is fixed on the magnet frame, and its vibrating part passes through the hollow inner hole of the coil and is located between the first magnet and the second electromagnet. Among them, the first magnet and the second magnet are close to the U-shaped opening of the U-shaped armature, and the coil is close to the bending part of the U-shaped armature.

[0014] Further, a predetermined gap is provided between both the first magnet and the second magnet and the coil; the bottom surface of the magnet frame is adjacent to the bottom port of the positioning bracket, the top surface of the magnet frame is adjacent to the top port of the positioning bracket, and a notch is formed in the area of the bottom surface of the magnet frame opposite to the predetermined gap.

[0015] Further, the fixing part of the U-shaped armature is fixed on the top surface of the magnet frame. One end of the driving rod passes through the notch and the predetermined gap in sequence and is connected to the vibrating part of the U-shaped armature, and the other end is connected to the diaphragm assembly.

[0016] Further, the fixing part of the U-shaped armature is fixed on the bottom surface of the magnet frame. A through window is provided at a position of the fixing part of the U-shaped armature opposite to the notch. One end of the driving rod passes through the window, the notch, and the predetermined gap in sequence and is connected to the vibrating part of the U-shaped armature, and the other end is connected to the diaphragm assembly.

[0017] Further, the receiver further includes a cover plate. The cover plate is located in the first hollow inner cavity of the housing and covers the top port of the positioning bracket; the side wall part of the housing between the top opening of the housing and the cover plate is curled inward, and the formed curled edge presses the cover plate.

[0018] Further, the cover plate is a PCB board, and two pads are arranged on the PCB board. The starting wire and the ending wire of the coil are respectively soldered on these two pads.

[0019] Compared with the prior art, a positioning bracket is added in the box body in the present invention, which is used to position and fix the motor, and a stacking assembly method is adopted during assembly, so as to not only solve the problem of motor positioning, but also facilitate the realization of automated production.

Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0021] Figure 1 is an exploded view of the moving iron receiver in the first embodiment of the present invention;

[0022] Figure 2 is Figure 1 a perspective view when the motor assembly and the driving rod in

[0023] Figure 3 is Figure 1 a first longitudinal sectional view of the moving iron receiver shown in

[0024] Figure 4 is Figure 1 a first longitudinal sectional view of the moving iron receiver shown in

[0025] Figure 5 is Figure 1 a second longitudinal sectional view of the moving iron receiver shown in

[0026] Figure 6 is Figure 1 a transverse sectional view of the moving iron receiver shown in

[0027] Figure 7 is an exploded view of the moving iron receiver in the second embodiment of the present invention;

[0028] Figure 8 is Figure 7 an exploded view of the motor assembly in

[0029] Figure 9 is Figure 7 a first longitudinal sectional view of the moving iron receiver shown in

[0030] Figure 10 is Figure 7 a schematic diagram of a first longitudinal section of the moving iron receiver shown in the second perspective;

[0031] Figure 11 is Figure 7 a schematic diagram of a second longitudinal section of the moving iron receiver shown;

[0032] Figure 12 is Figure 7 a schematic diagram of a transverse section of the moving iron receiver shown;

[0033] Figure 13 an exploded view of the moving iron receiver in the third embodiment of the present invention;

[0034] Figure 14 is Figure 13 a schematic diagram of a first longitudinal section of the moving iron receiver shown in the first perspective;

[0035] Figure 15 is Figure 13 a schematic diagram of a first longitudinal section of the moving iron receiver shown in the second perspective;

[0036] Figure 16 is Figure 13 a schematic diagram of a second longitudinal section of the moving iron receiver shown;

[0037] Figure 17 an exploded view of the moving iron receiver in the fourth embodiment of the present invention;

[0038] Figure 18 is Figure 17 a schematic diagram of a first longitudinal section of the moving iron receiver shown in the first perspective;

[0039] Figure 19 is Figure 17 a schematic diagram of a first longitudinal section of the moving iron receiver shown in the second perspective;

[0040] Figure 20 is Figure 17 a schematic diagram of a second longitudinal section of the moving iron receiver shown;

[0041] Figure 21 an exploded view of the moving iron receiver in the fifth embodiment of the present invention;

[0042] Figure 22 is Figure 21 a schematic diagram of a first longitudinal section of the moving iron receiver shown in the first perspective;

[0043] Figure 23 is Figure 21Schematic diagram of the first longitudinal section of the moving iron receiver shown in the second perspective;

[0044] Figure 24 is Figure 21 Schematic diagram of the second longitudinal section of the moving iron receiver shown.

Detailed implementation manners

[0045] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0046] As used herein, the term "one embodiment" or "embodiment" refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The appearances of "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they separate or alternative embodiments that exclude each other. Unless otherwise specified, the terms indicating electrical connection such as "connected", "coupled", and "joined" herein all mean direct or indirect electrical connection.

[0047] Please refer to Figure 1 shown, which is an exploded view of the moving iron receiver in the first embodiment of the present invention; Figure 2 is Figure 1 a three-dimensional view when the motor assembly and the driving rod in Figure 3 are assembled together; Please refer to Figure 1 shown, which is a schematic diagram of the first longitudinal section of the moving iron receiver shown in the first perspective; Please refer to Figure 4 shown, which is Figure 1 a schematic diagram of the first longitudinal section of the moving iron receiver shown in the second perspective; Please refer to Figure 5 shown, which is Figure 1 a schematic diagram of the second longitudinal section of the moving iron receiver shown; Please refer to Figure 6 shown, which is Figure 1 a schematic diagram of the transverse section of the moving iron receiver shown.

[0048] The following is based on Figures 1-6 to specifically introduce the receiver in the present invention.

[0049] Figures 1-6 The receiver shown includes a housing (or case) 110, a positioning bracket 120, a motor assembly 130, a driving rod 140, a diaphragm assembly (or diaphragm) 150, and a cover plate 160.

[0050] The housing 110 has a first hollow cavity 112. In Figures 1-6In the illustrated embodiment, the housing 110 is a hollow cylinder with a top opening 114. The housing 110 includes a bottom surface 115 and a side wall (which may be referred to as the first side wall) 116. The bottom surface 115 and the side wall 116 enclose the first hollow inner cavity 112. The housing 110 can be made of a metal material through a stretching process, and sound holes 118 are provided on the bottom surface 115 or the side wall 116 near the bottom surface 115.

[0051] The positioning bracket 120 is designed to be hollow and is sleeved in the first hollow inner cavity 112 of the housing 110. The positioning bracket 120 includes a top port 121, a bottom port 122, a side wall (which may be referred to as the second side wall) 123, and a second hollow inner cavity 124 surrounded by the side wall 123. A positioning structure 125 is provided on the inner wall of the side wall 123 of the positioning bracket 120. Figures 1-6 In the illustrated embodiment, the top port 121 of the positioning bracket 120 is adjacent to the top opening 114 of the housing 110, and the bottom port 122 of the positioning bracket 120 is adjacent to the bottom surface 115 of the housing 110. The positioning structure 125 is provided on the inner wall of the side wall 123 on the side of the top port 121 (or near the top port 121) of the positioning bracket 120. A groove 126 matching the outer shape of the diaphragm assembly 150 is provided on the inner wall of the side wall 123 on the side of the bottom port 122 (or near the bottom port 122) of the positioning bracket 120. The outer dimension of the diaphragm assembly 150 is slightly smaller than the inner frame dimension of the groove 126 of the positioning bracket 120 for fixing the diaphragm assembly 150.

[0052] During assembly, the top ports 121 and the bottom ports 122 on both sides of the positioning bracket 120 are respectively inserted into the motor assembly 130 and the diaphragm assembly 150. The motor assembly 130 is placed in the second hollow inner cavity 124 of the positioning bracket 120 through the top port 121 of the positioning bracket 120, and the positioning structure 125 positions and fixes the motor assembly 130. After the motor assembly 130 is inserted into the positioning bracket 120, it can also be strengthened and fixed with glue. The diaphragm assembly 150 is placed into the groove 126 through the bottom port 122 of the positioning bracket 120. After being placed into the groove 126, glue is used to seal and fix between the periphery of the diaphragm assembly 150 and the positioning bracket 120. The positioning bracket 120 is preferably made of a plastic material through injection molding.

[0053] The motor assembly 130 includes a magnet frame (or yoke) 131, a first magnet 132, a second magnet 133, a coil 134, and a U-shaped armature (or reed) 135. The first magnet 132 and the second magnet 133 are fixed in the inner cavity of the magnet frame 131, and the first magnet 132 and the second magnet 133 are opposite to each other and spaced apart (or not in contact); the U-shaped armature 135 includes a vibrating portion 1352, a fixing portion 1354, and a bending portion 1356. Its fixing portion 1354 is fixed on the magnet frame 131, and its vibrating portion 1352 passes through the hollow inner hole of the coil 134 and is located between the first magnet 132 and the second electromagnet 133. Among them, the first magnet 132 and the second magnet 133 are close to the U-shaped opening of the U-shaped armature 135, and the coil 134 is close to the bending portion 1356 of the U-shaped armature 135.

[0054] In Figures 1-6 In the illustrated embodiment, the positioning structure 125 is a card slot 125 provided on the inner wall of the side wall 123 on the side of the top port 121 of the positioning bracket 120; the width of the magnet frame 131 is greater than the width of the coil 134. After the motor assembly 130 is assembled, the side surface of the magnet frame 131 is higher than the side surface of the coil 134; when the motor assembly 130 is assembled into the positioning bracket 120, the magnet frame 131 is just snapped into the card slot 125 of the positioning bracket 120; a protrusion 1252 is provided at the notch of the card slot 125, and the protrusion 1252 is used to fix the magnet frame 131 snapped into the card slot 125. It should be noted that the positioning structure 125 is not limited to the card slot 125, and it can also be other positioning structures in the prior art, as long as it can position and fix the motor assembly 130. For example, the positioning structure 125 can also be a clamping portion protruding from the inner wall of the side wall 123 of the positioning bracket 120, and the motor assembly 130 is positioned and fixed by the clamping portion.

[0055] The length of the magnet frame 131 is greater than the lengths of the magnets 132 and 133. A notch 1312 for welding the drive rod 140 is provided on the magnet frame 131. A predetermined gap 1314 is left between the magnets 132, 133 and the coil 134 of the assembled motor assembly 130, and the center of the predetermined gap 1314 is aligned with the center of the notch 1312 on the magnet frame 131. That is to say, a predetermined gap 1314 is provided between both the first magnet 132 and the second magnet 133 and the coil 134; the bottom surface 1315 of the magnet frame 131 is adjacent to the bottom port 122 of the positioning bracket 120, the top surface 1316 of the magnet frame 131 is adjacent to the top port 121 of the positioning bracket 120, and a notch 1312 is formed in the area of the bottom surface 1315 of the magnet frame 131 opposite to the predetermined gap 1314.

[0056] The fixing part 1354 of the U-shaped armature 135 is fixed to the top surface 1316 of the magnet frame 131 by welding. One end of the driving rod 140 sequentially passes through the notch 1312 and the predetermined gap 1314 and is welded to the vibrating part 1352 of the U-shaped armature 135, and the other end is connected to the diaphragm assembly 150 by glue. The diaphragm assembly 150 includes a fixing frame, a diaphragm plate, and a film (not shown), and a through hole 152 for connecting to the driving rod 140 is provided on the diaphragm plate.

[0057] The cover plate 160 is a PCB board (Printed Circuit Board), which is located in the first hollow inner cavity 112 of the housing 110 and covers the top port 121 of the positioning bracket 120; the side wall portion of the housing 110 between the top opening 114 of the housing 110 and the cover plate 160 is curled inward, and the formed curled edge presses the cover plate 160. The outer dimension of the PCB board 160 is designed to be slightly smaller than the inner dimension of the housing 110, and two pads 162 are provided on the PCB board 160, and the starting wire and the ending wire of the coil 134 are respectively welded to these two pads 162.

[0058] As Figures 1-6 In the new moving iron receiver design shown, its assembly process is mainly as follows: The motor assembly 130 and the diaphragm assembly 150 are manufactured separately, and the driving rod 140 is welded to the manufactured motor assembly 130; then, the motor assembly 130 is installed into the positioning bracket 120 through the top port 121 of the positioning bracket 120 and can be reinforced with glue at the same time, and the diaphragm assembly 150 is installed into the positioning bracket 120 through the bottom port 122 of the positioning bracket 120 and sealed and fixed with glue; then the positioning bracket 120 assembled with the motor assembly 130 and the diaphragm assembly 150 is installed into the housing 110; then the PCB board 160 is installed to cover the top port 121 of the positioning bracket 120; then the top opening 114 of the housing 110 is curled inward, and the formed curled edge presses the cover plate 160; then seal with glue and weld the starting wire and the ending wire of the coil 134 to the pads 162.

[0059] As Figures 1-6 A deformation and extension of the moving iron receiver design shown, the motor assembly 130 can be assembled into the positioning bracket 120 in the reverse direction, for details please refer to Figures 7-12 the embodiment shown. Please refer to Figure 7 As shown, it is an exploded view of the moving iron receiver in the second embodiment of the present invention; Figure 8 For Figure 7 the exploded view of the motor assembly in Figure 9 As shown, it is Figure 7 the first longitudinal sectional view of the moving iron receiver shown in the first perspective; Please refer toFigure 10 As shown, it is Figure 7 a schematic diagram of the first longitudinal section of the moving iron receiver shown in the second perspective; please refer to Figure 11 As shown, it is Figure 7 a schematic diagram of the second longitudinal section of the moving iron receiver shown in the second perspective; please refer to Figure 12 As shown, it is Figure 7 a schematic diagram of the transverse section of the moving iron receiver shown in the second perspective.

[0060] Figures 7-12 The main difference between the embodiment shown in Figures 1-6 and the embodiment shown in is that the fixing part 1354 of the U-shaped armature 135 is fixed on the bottom surface 1315 of the magnet frame 131 (that is, the U-shaped armature 135 or the motor assembly 130 is reversely assembled into the positioning bracket 120); a through window 1357 is provided at a position of the fixing part 1354 of the U-shaped armature 135 opposite to the notch 1312 (or the center of the window 1357 is aligned with the center of the notch 1312 of the magnet frame 131). One end of the driving rod 140 passes through the window 1357, the notch 1312 and the predetermined gap 1314 in sequence and is welded to the vibrating part 1352 of the U-shaped armature 135, and the other end is connected to the diaphragm assembly 150 through glue.

[0061] As Figures 1-6 a deformation and extension of the design of the moving iron receiver shown, the sound hole 118 can be provided on the bottom surface 115 of the housing 110; the outer shape of the housing 110 can be designed as a cuboid or a cylinder. When the cylinder outer shape is adopted, the positioning bracket 120, the diaphragm assembly 150 and the cover plate 160 are preferably designed as circles accordingly. For details, please refer to Figures 13-16 the embodiment shown. Please refer to Figure 13 As shown, it is an exploded view of the moving iron receiver in the third embodiment of the present invention; please refer to Figure 14 As shown, it is Figure 13 a schematic diagram of the first longitudinal section of the moving iron receiver shown in the first perspective; please refer to Figure 15 As shown, it is Figure 13 a schematic diagram of the first longitudinal section of the moving iron receiver shown in the second perspective; please refer to Figure 16 As shown, it is Figure 13 a schematic diagram of the second longitudinal section of the moving iron receiver shown.

[0062] Figures 13-16 The main difference between the embodiment shown in Figures 1-6 and the embodiment shown is that: Figures 13-16In the illustrated embodiment, the outer shape of the housing 210 is designed to be cylindrical, and the positioning bracket 220, the diaphragm assembly 250, and the cover plate 260 are also circularly designed accordingly; the sound hole 218 is provided on the bottom surface 215 of the housing 210.

[0063] As Figures 1-6 A deformation and extension of the illustrated balanced armature receiver design, in order to maximize the use of space to improve the output, the diaphragm assembly 150 can be designed to be positioned not by the positioning bracket 120 but by the inner cavity of the housing 110. For details, please refer to Figures 17-20 as shown. Please refer to Figure 17 as shown, which is an exploded schematic view of the balanced armature receiver in the fourth embodiment of the present invention; please refer to Figure 18 as shown, which is Figure 17 a first longitudinal sectional view of the balanced armature receiver shown in the first perspective; please refer to Figure 19 as shown, which is Figure 17 a first longitudinal sectional view of the balanced armature receiver shown in the second perspective; please refer to Figure 20 as shown, which is Figure 17 a second longitudinal sectional view of the balanced armature receiver shown.

[0064] Figures 17-20 The main difference between the illustrated embodiment and Figures 1-6 the illustrated embodiment is that: Figures 17-20 In the illustrated embodiment, the receiver further includes a gasket 170. The gasket 170 is located in the first cavity 112 of the housing 110 and is placed on the bottom surface 115 of the housing 110. The diaphragm assembly 150 is clamped between the gasket 170 and the bottom port 122 of the positioning bracket 120. The gasket 170 is used to support the diaphragm assembly 150 and form a front cavity. This design is a stacked structure. During assembly, the gasket 170, the diaphragm assembly 150, the positioning bracket 120, the motor assembly 130, and the PCB board 160 are successively loaded into the housing 110, and then a hemming process is used to press all the components loaded into the housing 110. Since the vibrating plate area of the diaphragm assembly 150 is maximized in this design, higher output can be obtained without increasing the size, and the assembly process is simple and easy to realize automated production. Figures 17-20 In the illustrated embodiment, the outer shape of the housing 110 can be designed to be a cuboid or a cylinder.

[0065] For details, please refer to Figures 21-24 the illustrated embodiment. Please refer to Figure 21 as shown, which is an exploded schematic view of the balanced armature receiver in the fifth embodiment of the present invention; please refer to Figure 22 as shown, which is Figure 21 a first longitudinal sectional view of the balanced armature receiver shown in the first perspective; please refer to Figure 23As shown, it is Figure 21 A schematic diagram of a first longitudinal section of the moving iron receiver shown in the second perspective; please refer to Figure 24 As shown, it is Figure 21 A schematic diagram of a second longitudinal section of the moving iron receiver shown.

[0066] Figures 21-24 The embodiment shown and Figures 17-20 The main difference between the embodiment shown is that: Figures 21-24 In the embodiment shown, the outer shape of the housing 210 is designed as a cylinder, and the positioning bracket 220, the diaphragm assembly 250, the cover plate 260, and the gasket 270 are also circularly designed accordingly; the sound hole 218 is provided on the bottom surface 215 of the housing 210.

[0067] It should be particularly noted that in other embodiments, the diaphragm assembly 150 can be a diaphragm assembly with other structures in the prior art; one end of the driving rod 140 can also be connected to the diaphragm assembly 150 by other connection methods in the prior art; one end of the driving rod 140 can also be connected to the outer end of the vibrating part 1352 of the U-shaped armature 135, and does not need to pass through the magnet frame 132 but is directly connected to the diaphragm assembly 150 by avoiding the magnet frame 132.

[0068] In summary, the receiver in the present invention adds a positioning bracket in the box body, which is used to position and fix the motor. The stacking assembly method is adopted during assembly, so as to solve the problem of motor positioning, simplify the assembly process, improve production efficiency, and facilitate the realization of automation.

[0069] In the present invention, words such as "connected", "linked", "connected", and "joined" indicating electrical connection mean direct or indirect electrical connection unless otherwise specified.

[0070] It should be pointed out that any changes made by those skilled in the art to the specific embodiments of the present invention do not depart from the scope of the claims of the present invention. Accordingly, the scope of the claims of the present invention is not limited to the foregoing specific embodiments.

Claims

1. A receiver, characterized in that, it includes: a housing having a first hollow inner cavity; a positioning bracket sleeved in the first hollow inner cavity of the housing, the positioning bracket including a top port, a bottom port, a second side wall and a second hollow inner cavity surrounded by the second side wall, and a first positioning structure is provided inside the positioning bracket; a motor assembly placed in the second hollow inner cavity of the positioning bracket, and the motor assembly is positioned and fixed by the first positioning structure; a diaphragm assembly located inside the housing and placed on the side of the bottom port of the positioning bracket; a cover plate located in the first hollow inner cavity of the housing and covering the top port of the positioning bracket, the cover plate is a PCB board, and two pads are provided on the PCB board, and the starting wire and the ending wire of the coil are respectively soldered to these two pads; a driving rod located inside the housing, one end of the driving rod is connected to the motor assembly, and the other end is connected to the diaphragm assembly; wherein the motor assembly includes a magnet frame, a first magnet, a second magnet, a coil and a U-shaped armature, the first magnet and the second magnet are fixed in the inner cavity of the magnet frame, and the first magnet and the second magnet are opposite and spaced apart from each other; the U-shaped armature includes a vibrating part, a fixing part and a bending part, its fixing part is fixed on the magnet frame, its vibrating part passes through the hollow inner hole of the coil and is located between the first magnet and the second electromagnet, wherein, the first magnet and the second magnet are close to the U-shaped opening of the U-shaped armature, and the coil is close to the bending part of the U-shaped armature.

2. The receiver according to claim 1, characterized in that, the first positioning structure is provided on the inner wall of the side wall on the top port side of the positioning bracket.

3. The receiver according to claim 2, characterized in that, the housing is a hollow cylinder with a top opening, the housing includes a bottom surface and a first side wall, and the bottom surface and the first side wall enclose the first hollow inner cavity; the top port of the positioning bracket is adjacent to the top opening of the housing, and the bottom port of the positioning bracket is adjacent to the bottom surface of the housing.

4. The receiver according to claim 3, characterized in that, a second positioning structure is further provided inside the positioning bracket, the second positioning structure is provided on the inner wall of the side wall on the bottom port side of the positioning bracket, the diaphragm assembly is placed in the second hollow inner cavity of the positioning bracket, and the diaphragm assembly is positioned and fixed by the second positioning structure.

5. The receiver according to claim 4, characterized in that, the first positioning structure is a card slot, and when the motor assembly is assembled into the positioning bracket, the magnet frame just snaps into the card slot; the second positioning structure is a groove, and the diaphragm assembly is placed in the groove.

6. The receiver according to claim 3, characterized in that, it further includes a washer, the washer is located in the first cavity of the housing and placed on the bottom surface of the housing; the diaphragm assembly is clamped between the washer and the bottom port of the positioning bracket.

7. The receiver according to claim 1, characterized in that, The positioning bracket is made of plastic material by injection molding; The housing is made of metal material by a stretching process.

8. The receiver according to claim 1, characterized in that, A predetermined gap is provided between both the first magnet and the second magnet and the coil; The bottom surface of the magnet frame is adjacent to the bottom port of the positioning bracket, the top surface of the magnet frame is adjacent to the top port of the positioning bracket, and a notch is formed in the area of the bottom surface of the magnet frame opposite to the predetermined gap.

9. The receiver according to claim 8, characterized in that, The fixing part of the U-shaped armature is fixed on the top surface of the magnet frame, One end of the driving rod sequentially passes through the notch and the predetermined gap and is connected to the vibrating part of the U-shaped armature, and the other end thereof is connected to the diaphragm assembly.

10. The receiver according to claim 8, characterized in that, The fixing part of the U-shaped armature is fixed on the bottom surface of the magnet frame, A through window is provided at a position of the fixing part of the U-shaped armature opposite to the notch, one end of the driving rod sequentially passes through the window, the notch and the predetermined gap and is connected to the vibrating part of the U-shaped armature, and the other end is connected to the diaphragm assembly.

11. The receiver according to claim 3, characterized in that, The side wall portion of the housing between the top opening of the housing and the cover plate is curled inward, and the formed curled edge presses the cover plate.

Images