CN213661941U

CN213661941U - Loudspeaker module

Info

Publication number: CN213661941U
Application number: CN202022782184.5U
Authority: CN
Inventors: 张韬; 顾善勇; 赵洪强
Original assignee: KING TONE INNOVATION
Current assignee: KING TONE INNOVATION
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-07-09
Anticipated expiration: 2030-11-25

Abstract

The utility model discloses a loudspeaker module sets up first through-hole on loudspeaker module's vibrating diaphragm, first through-hole coats and is stamped waterproof ventilated membrane, thereby waterproof ventilated membrane is the membrane material that only allows the gas molecule to pass through and not allow the hydrone to pass through, thereby not only make loudspeaker module's back of the body chamber can balanced atmospheric pressure through first through-hole and external intercommunication from this to waterproof ventilated membrane on the first through-hole can also play waterproof effect to the inner chamber, make loudspeaker module's suitability more extensive, the performance is more excellent.

Description

Loudspeaker module

Technical Field

The utility model relates to an electroacoustic conversion technology field, concretely relates to speaker module.

Background

When the speaker module is applied to equipment such as cell-phone, panel computer or intelligent wrist-watch, set up the hole of revealing on module back of the body chamber casing, reveal the inside and outside atmospheric pressure of hole be used for balanced module, make the vibrating diaphragm keep at normal operating position, when avoiding equipment to use in the higher or lower area of atmospheric pressure, the vibrating diaphragm can lead to the skew because inside and outside atmospheric pressure is inconsistent, influences the performance of speaker module. For example, the back cavity of the watch is formed by a cavity for accommodating the loudspeaker module inside the watch and an inner cavity and a gap through which the cavity is communicated with the loudspeaker module, and the existing waterproof intelligent watch shell is not provided with additional leakage holes. Therefore, it is necessary to provide a leak hole in a region other than the watch case to balance the internal and external air pressures on the premise of satisfying the waterproof property.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a speaker module, which has the characteristics of balancing the internal and external air pressure and water resistance, so as to meet the requirements of different applications.

An embodiment of the utility model provides a speaker module, include:

vibrating diaphragm;

a magnetic circuit system for generating a magnetic field;

the voice coil is configured to controlled vibration in the magnetic field to drive the diaphragm to vibrate and produce sound; and

the basin frame is arranged on the outer sides of the vibrating diaphragm, the voice coil and the magnetic circuit system and is used for supporting and protecting an internal structure;

wherein, still be equipped with at least one first through-hole on the vibrating diaphragm, first through-hole is used for the intercommunication inside and outside the speaker module is with balanced atmospheric pressure, still cover on the first through-hole and have waterproof ventilated membrane.

Further, the waterproof breathable film is one of a polytetrafluoroethylene film, a polyethylene polymer film or a polypropylene spun-bonded nonwoven fabric.

Furthermore, a middle paste is further arranged on the vibrating diaphragm, a second through hole corresponding to the first through hole is formed in the middle paste, at least part of the first through hole is communicated with the second through hole, and the middle paste is used for increasing the local rigidity of the vibrating diaphragm.

Further, the waterproof breathable film covers one side of the vibrating diaphragm;

the middle paste is connected to the other side of the vibrating diaphragm;

thereby the voice coil loudspeaker voice coil with thereby drive the vibrating diaphragm vibration of well subsides fixed connection.

Further, the middle sticker is connected to one side of the vibrating diaphragm, and the waterproof breathable film is connected to the middle sticker and covers the second through hole;

the voice coil is connected to the other side of the diaphragm.

Further, the speaker module further includes:

the front shell is at least partially positioned in the basin frame, the edge area of the front shell is pressed on the edge area of the vibrating diaphragm on the basin frame, and the front shell is provided with a third through hole so that the first through hole can be communicated to the outside of the loudspeaker module.

Further, the magnetic circuit system includes:

the yoke is arranged in the basin frame;

at least one side magnet arranged on the yoke and positioned outside the voice coil; and

at least one middle magnet arranged on the yoke and at least partially extending into the voice coil;

the middle magnet and the side magnets are used for generating a magnetic field together, and the yoke is used for closing magnetic lines.

Furthermore, two side magnets are arranged and are oppositely arranged on two sides of the yoke iron.

Further, the magnetic circuit system further includes:

the middle pole piece is arranged on the middle magnet; and

the side pole piece is arranged on the side magnet;

the middle pole piece and the side pole pieces are used for magnetic conduction.

Further, a sealing ring is further arranged on the basin frame.

The utility model discloses loudspeaker module sets up first through-hole on the vibrating diaphragm, and first through-hole coats and is stamped waterproof ventilated membrane, and waterproof ventilated membrane is for only allowing the gaseous molecule to pass through and not allowing the membrane material that the hydrone passes through, thereby not only making loudspeaker module's back of the body chamber can balance atmospheric pressure through first through-hole and external intercommunication from this to waterproof ventilated membrane on the first through-hole can also play waterproof effect to the inner chamber, makes loudspeaker module's suitability more extensive, the performance is more excellent.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

fig. 1 is an exploded view of a speaker module according to an embodiment of the present invention;

fig. 2 is a front view of a speaker module according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a-a section of a speaker module according to an embodiment of the present invention.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Meanwhile, it should be understood that, in the following description, a "circuit" refers to a conductive loop constituted by at least one element or sub-circuit through electrical or electromagnetic connection. When an element or circuit is referred to as being "connected to" another element or element/circuit is referred to as being "connected between" two nodes, it may be directly coupled or connected to the other element or intervening elements may be present, and the connection between the elements may be physical, logical, or a combination thereof. In contrast, when an element is referred to as being "directly coupled" or "directly connected" to another element, it is intended that there are no intervening elements present.

Unless the context clearly requires otherwise, throughout the description, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Fig. 1-3 are schematic diagrams of a speaker module according to an embodiment of the present invention. As shown in fig. 1-3, the speaker module includes a diaphragm 11, a voice coil 13, a magnetic circuit system 2, and a frame 31, where the diaphragm 11 and the voice coil 13 form a vibration system, and cooperate with the magnetic circuit system 2 to vibrate and generate sound, and the frame 31 is located outside the diaphragm 11, the voice coil 13, and the magnetic circuit system 2 and is used to support and protect internal structures.

The magnetic circuit system 2 generates a magnetic field, which covers the space in which the voice coil 13 is located. A connection line 131 is led out from the voice coil 13 and electrically connected to a control terminal (not shown in the figure) through the connection line 131, and the control terminal inputs a predetermined alternating current signal to the voice coil 13 so that the voice coil 13 vibrates based on electromagnetic induction in a magnetic field generated by the magnetic circuit system 2, and drives the diaphragm 11 to synchronously vibrate and make a sound.

The speaker module described in this embodiment can be applied to equipment such as cell-phone, panel computer or intelligent wrist-watch. For example, when being applied to intelligent wrist-watch, the inside cavity of holding the speaker module group of wrist-watch, and the cavity communicates the inner chamber and the back of the body chamber that the speaker module group constitutes the gap of speaker module group. If the back cavity is completely closed, the vibrating diaphragm can cause unbalance of internal and external air pressure after long-term work, and the vibration performance of the vibrating diaphragm is influenced. As shown in fig. 1, the diaphragm 11 of this embodiment is provided with a first through hole 111, and the first through hole 111 connects the back cavity of the speaker module and the outside of the speaker module, and serves as a sole air passage inside and outside the speaker module. Therefore, the air pressure inside and outside the loudspeaker can be balanced, and the vibration output characteristic is prevented from being influenced by the position deviation of the diaphragm 11 under the large air pressure difference inside and outside the loudspeaker.

The first through hole 111 is covered with a waterproof breathable film 1111. The waterproof breathable film 1111 can directly or indirectly cover the first through hole 111. The waterproof breathable film 1111 is a film material that allows only gas molecules to permeate therethrough but not water molecules, and may be a polytetrafluoroethylene film, a polyethylene polymer film, a polypropylene spun-bonded nonwoven fabric (PP spun-bonded nonwoven fabric), or the like. Set up waterproof ventilated membrane 1111 and make the speaker module possess waterproof characteristic to avoid water or steam to get into the inner chamber and influence the function of electromagnetic component wherein.

If the first through hole 111 is not provided, there is no other air passage between the inner cavity of the speaker module and the outside of the speaker module, which will cause the air pressure in the cavity to be unbalanced. When the speaker module is used in an area with higher or lower air pressure, the difference between the air pressure inside and outside the speaker module is too large, and the vibrating diaphragm 11 will shift to the side with lower air pressure, so that the vibration characteristics of the vibrating diaphragm 11 are changed, and the performance of the speaker is changed. And set up waterproof ventilated membrane 1111 and make speaker module still have waterproof characteristic simultaneously under possessing the above-mentioned characteristics of inside and outside balanced atmospheric pressure.

In some other optional implementations, a plurality of first through holes 111 may be disposed on the diaphragm 11, and each first through hole 111 is covered by a waterproof breathable film 1111. The number of waterproof breathable films 1111 does not necessarily correspond to the number of first through holes 111, and one large waterproof breathable film 1111 may cover one or more first through holes 1111. The area and shape of the first through hole 111 may be different, for example, according to the volume or the application of the speaker module, the first through hole 111 with different area or shape and the waterproof and breathable film 1111 with different size and number may be adopted.

The waterproof breathable membrane 1111 may be attached to the diaphragm 11 by means of adhesive. The adhesive tape may be a pressure sensitive double sided tape or an ultraviolet curing adhesive (UV glue). If the pressure-sensitive double-sided adhesive tape is used, the process needs to maintain pressure.

As shown in fig. 3, the edge region of the diaphragm 11 is fixedly connected to the frame 31, and the connection may be an adhesive connection. The central region of the diaphragm 11 is overhead so as to be vibrated by the voice coil 13.

As shown in fig. 1-3, a central patch 12 may also be disposed on the diaphragm 11, where the central patch 12 is used to increase the local stiffness of the diaphragm 11, so as to improve the vibration performance thereof. In this embodiment, the waterproof breathable film 1111 directly covers the upper surface of the diaphragm 11, and the middle sticker 12 is connected to the lower surface of the diaphragm 11. The middle sticker 12 is provided with a second through hole 121 corresponding to the first through hole 111, and at least a part of the first through hole 111 is communicated with the second through hole 121, so that the inside and the outside of the speaker module can still balance air pressure through the first through hole 111 and the second through hole 121.

The voice coil 13 is fixedly connected with the middle sticker 12 and is located below the diaphragm 11. The voice coil 13 is a winding in a ring shape, which naturally escapes from the first through hole 111 and the second through hole 121 without affecting the air pressure balance characteristic of the speaker module. The voice coil 13 and the middle paste 12, and the middle paste 12 and the diaphragm 11 can be connected by gluing.

In another optional implementation manner, the middle sticker 12 may also be connected to the upper surface of the diaphragm 11, the voice coil 13 is connected to the lower surface of the diaphragm 11 and may further drive the diaphragm 11 to vibrate, and the waterproof breathable film 1111 covers the second through hole 121 of the middle sticker 12 and further indirectly covers the first through hole 111.

In yet another alternative implementation, the speaker module may not have the middle sticker 12, and the waterproof breathable film 1111 is connected to the upper surface of the diaphragm 11, and the voice coil 13 is connected to the lower surface of the diaphragm 11.

As shown in fig. 1 to 3, the magnetic circuit system 2 includes a middle magnet 21, a side magnet 22, a yoke 23, a middle pole piece 24, and a side pole piece 25. Wherein the yoke 23 is disposed in the tub frame 31, since fig. 3 is a sectional view, the part outside the sectional view is not shown, and the yoke 23 is located at the bottom of the tub frame 31 in conjunction with fig. 1 and 2. And at least one middle magnet 21 arranged on the yoke 23, wherein the middle magnet 21 at least partially extends into the voice coil 13. And at least one side magnet 22 disposed on the yoke 23, wherein the side magnet 22 is located outside the voice coil 13. A magnetic gap is formed between the middle magnet 21 and the side magnet 22, and the voice coil 13 is at least partially located in the magnetic gap. The middle magnet 21 and the side magnet 22 generate a magnetic field in the magnetic gap, the magnetic field can apply electromagnetic force to the voice coil 13 in the magnetic gap, and when alternating current is applied to the voice coil 13, the voice coil 13 will vibrate up and down based on the electromagnetic induction. The yoke 23 is provided below the middle magnet 21 and the side magnet 22 to enclose magnetic lines of force. The middle pole piece 24 is arranged on the middle magnet 21 and located in the voice coil 13, the side pole piece 25 is arranged on the side magnet 22 and located outside the voice coil 13, and both the middle pole piece 24 and the side pole piece 25 are used for magnetic conduction. Wherein, the middle pole piece 24 and the middle magnet 21 can be connected by gluing.

In the present embodiment, as shown in fig. 1 and 3, two side magnets 22 are provided, one on each side of the middle magnet 21. Thereby, the magnetic field is more uniform. The side pole piece 25 is an annular pole piece, is molded in the basin frame 31, and is integrally formed with the basin frame 31, and after the loudspeaker module assembly is completed, the side pole piece 25 is located on the side magnet 22.

As shown in fig. 1 to 3, a sealing ring 311 may be further disposed on the outer side of the frame 31 to improve the waterproof property of the speaker module. The sealing ring 311 may be a rubber ring, and is disposed around the periphery of the basin stand 31.

As shown in fig. 1 and 3, the speaker module may further include a front housing 32, the front housing 32 is at least partially located in the frame 31, an edge region of the front housing is adhesively connected to the frame 31, and the edge region of the diaphragm 11 is pressed onto the frame 31 to further fix the diaphragm 11. The front shell 32 has a third through hole 321 to avoid the first through hole 111 and the second through hole 121, so that the air can still be communicated with the inside and the outside of the speaker module through the first through hole 111, the second through hole 121 and the third through hole 321 to balance the air pressure. The front shell 32 may be made of metal, and also has a function of protecting the diaphragm 11.

The utility model discloses a speaker module sets up first through-hole on the vibrating diaphragm, and first through-hole coats and is stamped waterproof ventilated membrane, and waterproof ventilated membrane is the membrane material that only allows the gas molecule to pass through and not allow the hydrone to pass through, thereby not only makes the back of the body chamber of speaker module can balance atmospheric pressure through first through-hole and external intercommunication from this to waterproof ventilated membrane on the first through-hole can also play waterproof effect to the inner chamber, makes the suitability of speaker module more extensive, the performance is more excellent.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A speaker module, comprising:

a diaphragm (11);

a magnetic circuit system (2) for generating a magnetic field;

a voice coil (13) configured to vibrate in the magnetic field in a controlled manner to drive the diaphragm (11) to vibrate and sound; and

the basin frame (31) is arranged on the outer sides of the vibrating diaphragm (11), the voice coil (13) and the magnetic circuit system (2) and is used for supporting and protecting an internal structure;

wherein, still be equipped with at least one first through-hole (111) on vibrating diaphragm (11), first through-hole (111) are used for communicating the back chamber of speaker module extremely the speaker module is outside with balanced atmospheric pressure, still cover on first through-hole (111) has waterproof ventilated membrane (1111).

2. The speaker module as claimed in claim 1, wherein the waterproof breathable film (1111) is one of a polytetrafluoroethylene film, a polyethylene polymer film or a polypropylene spun-bonded nonwoven fabric.

3. The loudspeaker module as recited in claim 1, wherein the diaphragm (11) is further provided with a middle sticker (12), the middle sticker (12) is provided with a second through hole (121) corresponding to the first through hole (111), the first through hole (111) is at least partially communicated with the second through hole (121), and the middle sticker (12) is used for increasing the local rigidity of the diaphragm (11).

4. A loudspeaker module according to claim 3, wherein the waterproof breathable membrane (1111) covers one side of the diaphragm (11);

the middle paste (12) is connected to the other side of the vibrating diaphragm (11);

the voice coil (13) is fixedly connected with the middle sticker (12) so as to drive the vibrating diaphragm (11) to vibrate.

5. A loudspeaker module according to claim 3, wherein the middle sticker (12) is attached to one side of the diaphragm (11), and the waterproof breathable film (1111) is attached to the middle sticker (12) and covers the second through hole (121);

the voice coil (13) is connected to the other side of the diaphragm (11).

6. The speaker module of claim 5, further comprising:

the front shell (32) is at least partially positioned in the basin frame (31), the edge area of the front shell (32) is pressed on the edge area of the vibrating diaphragm (11) on the basin frame (31), and the front shell (32) is provided with a third through hole (321) so that the first through hole (111) can be communicated with the outside of the loudspeaker module.

7. A loudspeaker module according to claim 5, wherein the magnetic circuit system (2) comprises:

a yoke (23) disposed in the tub frame (31);

at least one side magnet (22) arranged on the yoke (23) and positioned outside the voice coil (13); and

at least one middle magnet (21) arranged on the yoke iron (23) and at least partially extending into the voice coil (13);

the middle magnet (21) and the side magnets (22) are used for generating a magnetic field together, and the yoke iron (23) is used for closing magnetic lines.

8. A loudspeaker module according to claim 7, wherein two of the edge magnets (22) are provided, oppositely on either side of the yoke (23).

9. A loudspeaker module according to claim 7 or 8, wherein the magnetic circuit system (2) further comprises:

the middle pole piece (24) is arranged on the middle magnet (21); and

a side pole piece (25) arranged on the side magnet (22);

the middle pole piece (24) and the side pole pieces (25) are used for magnetic conduction.

10. A loudspeaker module according to claim 5, wherein the frame (31) is further provided with a sealing ring (311).