CN218183507U

CN218183507U - Sound pressure output device

Info

Publication number: CN218183507U
Application number: CN202121814315.1U
Authority: CN
Inventors: 陈斌
Original assignee: Suzhou Jushengyuan Electronics Co ltd
Current assignee: Suzhou Jushengyuan Electronics Co ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-12-30
Anticipated expiration: 2031-08-05

Abstract

The utility model relates to an acoustic pressure output device. The magnetic pole mainly comprises a magnetic pole, a coil, a first shell, a second shell, a first vibrating diaphragm, a second vibrating diaphragm, a first magnet, a second magnet, a third magnet and a fourth magnet. The coil overcoat is in the one end of magnetic column, first casing and second casing set up the both sides at the magnetic column respectively, first vibrating diaphragm links to each other with first casing, the second vibrating diaphragm links to each other with the second casing, the both sides of the one end of first vibrating diaphragm are provided with first magnet and second magnet respectively, the both sides of the one end of second vibrating diaphragm are provided with third magnet and fourth magnet respectively, conduct the magnetic field that the coil produced to first vibrating diaphragm through magnetic column and first casing, first vibrating diaphragm vibrates under the effect of first magnet and second magnet, conduct the magnetic field that the coil produced to the second vibrating diaphragm through magnetic column and second casing, the second vibrating diaphragm vibrates under the effect of third magnet and fourth magnet. The device has small volume and high sound pressure output.

Description

Sound pressure output device

Technical Field

The utility model relates to a sound pressure output device makes the field, especially relates to sound pressure output device.

Background

A sound pressure output device is installed in the earphone or the receiver. The sound pressure output device is used for outputting sound pressure so as to generate sound. The conventional sound pressure output device includes a balanced armature unit. The balance armature unit comprises an armature, a coil is sleeved outside one end of the armature, a magnet and an iron core are installed at the other end of the armature, and the armature is connected with the vibrating diaphragm through a transmission rod. The drive rod transmits the vibration of the armature to the vibrating diaphragm, so that the vibrating diaphragm is driven to vibrate, and the vibrating diaphragm can output sound pressure.

In order to increase the output sound pressure, it is a conventional practice to provide two balanced armature units, and the two balanced armature units are used in parallel or in series combination. Therefore, the output sound pressure can be improved, and meanwhile, the stability is good. But has the following disadvantages: because two balance armature units are used, the whole size is large, the number of parts is large, and the cost is high.

SUMMERY OF THE UTILITY MODEL

Based on this, a sound pressure output device is provided. The device has small volume while improving sound pressure.

A sound pressure output device comprising:

a magnetic column, a coil, a first shell, a second shell, a first vibrating diaphragm, a second vibrating diaphragm, a first magnet, a second magnet, a third magnet and a fourth magnet,

the coil is sleeved at one end of the magnetic column, the first shell and the second shell are respectively arranged at two sides of the magnetic column,

the first diaphragm is connected with the first shell, the second diaphragm is connected with the second shell,

a first magnet and a second magnet are respectively arranged on two sides of one end of the first vibrating diaphragm,

a third magnet and a fourth magnet are respectively arranged on two sides of one end of the second diaphragm,

the magnetic field generated by the coil is transmitted to the first diaphragm through the magnetic column and the first shell, the first diaphragm vibrates under the action of the first magnet and the second magnet,

and the magnetic field generated by the coil is transmitted to the second vibrating diaphragm through the magnetic column and the second shell, and the second vibrating diaphragm vibrates under the action of the third magnet and the fourth magnet.

This application uses a coil to provide electromagnetic drive power as the motor, conducts magnetic field to first vibrating diaphragm through magnetism post and first casing, and the vibrating plate of first vibrating diaphragm can produce the magnetic pole that corresponds, and then makes first vibrating diaphragm vibrate under the effect of first magnet and second magnet, exports the acoustic pressure through the vibration of first vibrating diaphragm. In a similar way, the magnetic field is conducted to the second vibrating diaphragm through the magnetic column and the second shell, the vibrating sheet of the second vibrating diaphragm can generate a corresponding magnetic pole, so that the second vibrating diaphragm vibrates under the action of the third magnet and the fourth magnet, and the sound pressure is output through the vibration of the second vibrating diaphragm. Sound pressure is output through two vibrating diaphragms, and the sound pressure can be obviously improved. Simultaneously, this application only uses a coil, and has saved components such as transfer line for overall structure is comparatively compact, and the volume is less.

In one embodiment, the magnetic pole comprises a winding part for coating the coil, and packaging parts arranged on two sides of the winding part and spaced from the winding part.

In one embodiment, the first diaphragm includes a first diaphragm and a first thin film, and an outer edge of the first diaphragm is connected to the first housing; the second diaphragm comprises a second vibrating sheet and a second thin film, and the outer edge of the second vibrating sheet is connected with the second shell.

In one embodiment, the first housing comprises a first upper housing and a first lower housing, and the outer edge of the first vibrating plate is located between the first upper housing and the first lower housing.

In one embodiment, the second housing includes a second upper housing and a second lower housing, and the outer edge of the second vibrating plate is located between the second upper housing and the second lower housing.

In one embodiment, the first film is provided with a bulge portion, the bulge portion of the first film bulges in a direction away from the second housing, and the second film is provided with a bulge portion, the bulge portion of the second film bulges in a direction away from the first housing.

In one embodiment, a portion of the coil extends into the first housing and another portion of the coil extends into the second housing.

In one embodiment, the magnetic column comprises a first end and a second end, the second end is provided with a winding part, the coil is sleeved on the winding part of the magnetic column, the first magnet and the second magnet are arranged on one side of the first end of the magnetic column, and the third magnet and the fourth magnet are arranged on the other side of the first end of the magnetic column.

In one embodiment, the first housing is provided with a sound pressure output port, and the second housing is also provided with a sound pressure output port.

In one embodiment, the first shell is made of an iron-nickel alloy, the second shell is made of an iron-nickel alloy, the magnetic column is made of an iron-nickel alloy, the first diaphragm comprises a first diaphragm and a first thin film, the first diaphragm is made of an iron-nickel alloy, the second diaphragm comprises a second diaphragm and a second thin film, and the second diaphragm is made of an iron-nickel alloy.

Drawings

Fig. 1 is a schematic view of an internal structure of a sound pressure output device according to an embodiment of the present application.

Fig. 2 is a schematic diagram of a first diaphragm and a second diaphragm disposed on two sides of a magnetic pillar according to an embodiment of the present application.

Fig. 3 is an exploded view of a magnetic cylinder according to an embodiment of the present application.

Fig. 4 is a schematic view of a first housing of an embodiment of the present application.

Wherein:

110. magnetic pillar 110a, first end 110b, second end 110c, and packaging part

120. Coil 130, first shell 131, first upper shell

131a, a sound pressure output port 132, a first lower case 132a, a through hole

140. Second case 141, second upper case 142, and second lower case

142a, sound pressure output port

150. A first diaphragm 151, a first film 152, a first vibrating plate

160. Second diaphragm 161, second film 162, second vibrating piece

171. First magnet 172, second magnet 173, third magnet 174, and fourth magnet

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

As shown in fig. 1 and 2, an embodiment of the present application provides a sound pressure output apparatus including: the magnetic pole 110, the coil 120, the first case 130, the second case 140, the first diaphragm 150, the second diaphragm 160, the first magnet 171, the second magnet 172, the third magnet 173, and the fourth magnet 174.

The coil 120 is sleeved at one end of the magnetic column 110, and the first shell 130 and the second shell 140 are respectively disposed at two sides of the magnetic column 110.

The first diaphragm 150 is connected to the first housing 130, and the second diaphragm 160 is connected to the second housing 140.

A first magnet 171 and a second magnet 172 are respectively disposed on both sides of one end of the first diaphragm 150. A third magnet 173 and a fourth magnet 174 are respectively disposed on both sides of one end of the second diaphragm 160.

The magnetic field generated by the coil 120 is conducted to the first diaphragm 150 through the magnetic pillar 110 and the first housing 130, and the first diaphragm 150 vibrates under the action of the first magnet 171 and the second magnet 172.

The magnetic field generated by the coil 120 is transmitted to the second diaphragm 160 through the magnetic pillar 110 and the second case 140, and the second diaphragm 160 is vibrated by the third magnet 173 and the fourth magnet 174.

When the coil 120 of the present application is energized, the magnetic field generated by the coil 120 may generate magnetic poles at two ends of the magnetic pillar 110, for example, the first end 110a of the magnetic pillar 110 is S-pole, and the second end 110b of the magnetic pillar 110 is N-pole, and the magnetic field may be conducted to the first diaphragm 150 through the magnetic pillar 110 and the first housing 130. The first diaphragm 150 includes a first diaphragm 152 and a first thin film 151. The portion of the first diaphragm 152 between the first magnet 171 and the second magnet 172 generates an N-pole by the magnetic field. Further, the first diaphragm 150 vibrates under the action of the first magnet 171 and the second magnet 172, and the sound pressure is output by the vibration of the first diaphragm 150. Here, the fixed magnetic pole of the first magnet 171 may be an N-pole, and the fixed magnetic pole of the second magnet 172 may be an S-pole.

It should be noted that, after the coil 120 is powered on, if the first end 110a of the magnetic pillar 110 is an N pole and the second end 110b of the magnetic pillar 110 is an S pole, the S pole is generated at the corresponding portion of the first vibrating piece 152.

Similarly, the magnetic field can be transmitted to the second diaphragm 160 through the magnetic pillar 110 and the second housing 140, and the second diaphragm 160 can vibrate under the action of the third magnet 173 and the fourth magnet 174, so as to output sound pressure through the vibration of the second diaphragm 160. Here, the fixed magnetic pole of the third magnet 173 may be an S-pole, and the fixed magnetic pole of the fourth magnet 174 may be an N-pole.

The first diaphragm 150 and the second diaphragm 160 may vibrate in the same direction or in opposite directions.

The device of this application when improving acoustic pressure output, the structure is retrencied more, can reduce the cost of spare part, and simultaneously, the assembling process is also simplified, practices thrift labour cost. Moreover, the acoustic performance and the mechanical stability are better brought through the symmetrical structural design.

In one embodiment, the magnetic pillar 110 includes a winding portion for housing the coil 120, and packing portions 110c disposed at both sides of the winding portion and spaced apart from the winding portion.

It should be noted that the winding portion may be disposed on the second end 110b of the magnetic pillar 110 as shown in fig. 3.

In assembling, a copper wire may be wound around the winding portion to form the coil 120. Then, the two packing portions 110c are disposed on both sides of the coil 120, respectively, and the coil 120 is positioned.

In one embodiment, the first diaphragm 150 includes a first vibrating plate 152 and a first thin film 151, and an outer edge of the first vibrating plate 152 is connected to the first housing 130; the second diaphragm 160 includes a second diaphragm 162 and a second thin film 161, and an outer edge of the second diaphragm 162 is connected to the second housing 140.

In the first diaphragm 150 and the second diaphragm 160, the films and the diaphragms are bonded together by hot press molding. This application is different from traditional acoustic pressure output mode, and this application does not come vibration transfer to the vibrating diaphragm through the transfer line. The application makes the vibrating diaphragm directly vibrate, namely regard the vibrating diaphragm to use as vibration part promptly, also regard as sound pressure output part to use.

In one embodiment, the first housing 130 includes a first upper housing 131 and a first lower housing 132, and the outer edge of the first vibrating plate 152 is located between the first upper housing 131 and the first lower housing 132.

Similarly, the second housing 140 includes a second upper housing 141 and a second lower housing 142, and the outer edge of the second diaphragm 162 is located between the second upper housing 141 and the second lower housing 142.

In one embodiment, the first film 151 is provided with a bulge, and the bulge of the first film 151 bulges away from the second housing 140. The second film 161 is provided with a swelling portion, and the swelling portion of the second film 161 swells in a direction away from the first housing 130.

In one embodiment, a portion of the coil 120 extends into the first housing 130 and another portion of the coil 120 extends into the second housing 140. That is, the first case 130 and the second case 140 accommodate the coil 120.

In the above arrangement, since the coil 120 is accommodated in the first casing 130 and the second casing 140, the volume of the whole device is reduced.

Specifically, corresponding through holes 132a may be provided on the first case 130 and the second case 140 for the coil 120 to pass through. For example, as shown in fig. 4, the first housing 130 includes a first upper housing 131 and a first lower housing 132, and a through hole 132a is provided in the first lower housing 132, and the through hole 132a is penetrated by the coil 120.

In one embodiment, the magnetic pillar 110 includes a first end 110a and a second end 110b, the second end 110b is provided with a winding portion, and the coil 120 is wrapped around the winding portion of the magnetic pillar 110. The first and

second magnets

171 and 172 are disposed at one side of the first end 110a of the magnetic cylinder 110, and the third and

fourth magnets

173 and 174 are disposed at the other side of the first end 110a of the magnetic cylinder 110.

In one embodiment, the first housing 130 is provided with a sound pressure outlet, and the second housing 140 is also provided with a sound pressure outlet.

For example, as shown in fig. 4, the first housing 130 includes a first upper housing 131 and a first lower housing 132, and a sound pressure output port 131a is provided on the first upper housing 131. Similarly, a sound pressure output port 142a may be provided on the second lower case 142. The specific setting position of the sound pressure output port can be close to the vibration part of the corresponding vibrating sheet.

In one embodiment, the first shell 130 is made of an iron-nickel alloy, the second shell 140 is made of an iron-nickel alloy, the magnetic pillar 110 is made of an iron-nickel alloy, and the first diaphragm 150 and the second diaphragm 160 both include a diaphragm and a thin film, and the diaphragm is made of an iron-nickel alloy.

The iron-nickel alloy is preferably: the iron-nickel alloy comprises 49-51% of nickel by mass fraction. Furthermore, the magnetic permeability of the iron-nickel alloy can be increased after heat treatment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A sound pressure output device, comprising:

the first vibrating diaphragm is connected with the first shell, the second vibrating diaphragm is connected with the second shell,

a first magnet and a second magnet are respectively arranged on two sides of one end of the first diaphragm,

2. The sound pressure output device according to claim 1, wherein the magnetic pole includes a winding portion for housing the coil, and packing portions provided on both sides of the winding portion at a distance from the winding portion.

3. The acoustic pressure output device according to claim 1, wherein the first diaphragm includes a first diaphragm and a first thin film, and an outer edge of the first diaphragm is connected to the first housing; the second diaphragm comprises a second vibrating sheet and a second thin film, and the outer edge of the second vibrating sheet is connected with the second shell.

4. The acoustic pressure output device according to claim 3, wherein the first housing includes a first upper housing and a first lower housing, and an outer edge of the first diaphragm is located between the first upper housing and the first lower housing.

5. The sound pressure output device according to claim 3, wherein the second case includes a second upper case and a second lower case, and an outer edge of the second diaphragm is located between the second upper case and the second lower case.

6. The sound pressure output device according to claim 3, characterized in that the first film is provided with a bulge portion that bulges in a direction away from the second housing, and the second film is provided with a bulge portion that bulges in a direction away from the first housing.

7. The sound pressure output device according to claim 1, wherein a part of the coil protrudes into the first housing, and another part of the coil protrudes into the second housing.

8. The sound pressure output device according to claim 1, wherein the magnetic cylinder includes a first end and a second end, the second end is provided with a winding portion, the coil is wound around the winding portion of the magnetic cylinder, the first magnet and the second magnet are provided on one side of the first end of the magnetic cylinder, and the third magnet and the fourth magnet are provided on the other side of the first end of the magnetic cylinder.

9. The acoustic pressure output device according to claim 1, wherein the first housing is provided with an acoustic pressure output port, and the second housing is also provided with an acoustic pressure output port.

10. The acoustic pressure output device according to claim 1, wherein the first case is made of an iron-nickel alloy, the second case is made of an iron-nickel alloy, the magnetic pillar is made of an iron-nickel alloy, the first diaphragm includes a first diaphragm and a first thin film, the first diaphragm is made of an iron-nickel alloy, the second diaphragm includes a second diaphragm and a second thin film, and the second diaphragm is made of an iron-nickel alloy.