CN216162866U - Loudspeaker - Google Patents

Abstract

The embodiment of the utility model discloses a loudspeaker, which utilizes a blocking structure which is arranged at the inner side of a shell and is arranged relative to a vibrating diaphragm, when the vibrating diaphragm is depressed towards the inner side of the loudspeaker under the pressure of the outer side, the blocking structure can limit the vibrating diaphragm to move towards the inner side of the shell, so that the pressure of the outer side is absorbed by the blocking structure. Therefore, the diaphragm is prevented from being torn due to excessive deformation, and other parts in the loudspeaker are further protected from being damaged.

Description

Loudspeaker

Technical Field

The utility model relates to the field of audio equipment, in particular to a loudspeaker.

Background

With the increasingly tight connection between electronic products and people's lives, people obtain more and more information through electronic products such as mobile phones or smart watches. The loudspeaker is used as an electroacoustic transducer and is an important component of electronic equipment, but the loudspeaker is difficult to avoid the conditions of collision or extrusion and the like in daily use, and at the moment, a vibrating diaphragm of the loudspeaker can deform. How to protect the diaphragm of the loudspeaker becomes a problem to be solved.

SUMMERY OF THE UTILITY MODEL

In view of this, embodiments of the present invention provide a speaker, in which a blocking structure disposed in a speaker housing is used to prevent a diaphragm from being excessively deformed toward an inner side of the speaker due to external pressure.

The speaker of the embodiment of the utility model comprises:

vibrating diaphragm;

a magnetic circuit system for forming a magnetic gap;

the voice coil is arranged in the magnetic gap and is connected with the vibrating diaphragm;

the end face of the shell wall is connected to the outer edge of the vibrating diaphragm, the shell is used for accommodating the magnetic circuit system and the voice coil, the blocking structure and the vibrating diaphragm are arranged at intervals, and the blocking structure is arranged relative to at least part of the area of the vibrating diaphragm;

the blocking structure is configured to limit the diaphragm when the diaphragm is depressed towards the inner side of the shell by an external force, and the blocking structure is avoided from the voice coil.

Further, the diaphragm has a recessed portion recessed toward the inside of the housing, and the blocking structure is provided with respect to the recessed portion.

Further, the recess is disposed around the central region of the diaphragm;

the blocking structure is arranged around the shell wall and extends towards the voice coil direction.

Further, the speaker further includes: the middle paste is arranged in the center area of the vibrating diaphragm, and the voice coil is connected with the vibrating diaphragm through the middle paste;

wherein at least a partial region of the middle paste is arranged relative to the blocking structure.

Further, the speaker further includes:

the voice coil is connected with the middle sticker through the voice coil bracket;

the magnetic circuit system comprises a magnetic bowl, a magnet and a washer, wherein the magnetic bowl is provided with a bowl bottom and a bowl wall arranged around the edge of the bowl bottom, the magnet is fixed on the inner side of the bowl bottom, the washer is fixed on the top of the magnet, and the magnetic gap is positioned between the washer and the inner side of the bowl wall;

wherein the voice coil support is configured to have a space with the bowl bottom when the middle sticker is in contact with the blocking structure.

Further, the speaker further includes: the counterweight block is fixed on the outer side of the magnetic circuit system, one end of the elastic sheet is connected with the shell, and the other end of the elastic sheet is connected with the magnetic circuit system and/or the counterweight block;

the magnetic circuit system and the balancing weight are spaced from the shell, the elastic force of the elastic sheet is configured to enable the magnetic circuit system and the balancing weight to have freedom degree of movement in the shell, the elastic sheet is not in contact with the shell, and meanwhile the acceleration of the magnetic circuit system is transmitted to the shell through the elastic sheet.

Further, the magnetic circuit system comprises a magnetic bowl, wherein the magnetic bowl is provided with a bowl bottom and a bowl wall arranged around the edge of the bowl bottom;

the counterweight block is provided with a first part and a second part, the first part and the second part are arranged on the outer side of the bowl wall and surround the outer side of the bowl wall, the top of the first part and the end surface of the bowl wall are at the same height, and the bottom of the second part and the outer side of the bowl bottom are at the same height;

the elastic sheet is arranged to surround the outer side of the bowl wall and located between the first part and the second part, partial area of the elastic sheet is in contact with the first part and the second part simultaneously, and the elastic sheet is provided with an extending part which is connected to the shell wall;

the magnetic bowl and the counterweight block do not contact with the blocking structure and the shell bottom when moving;

the acceleration is transmitted through contact areas of the elastic sheet, the first part and the second part.

Further, the speaker further includes: a terminal and a lead connected to the voice coil;

the shell is provided with a first window facing the shell bottom, and the terminal is arranged at the position of the first window;

the first part with be provided with respectively on the bowl wall and face the breach of blockking the structure direction, the lead wire passes through the breach with the terminal is connected.

Further, the housing has a second window communicating to the inside of the housing, the second window being located at the bottom position and/or the wall position relative to the blocking structure.

Further, the casing wall comprises a diaphragm support, a first frame and a second frame, the first frame is connected with the casing bottom through the second frame, the blocking structure is located on the first frame, and the edge of the diaphragm is wrapped on the diaphragm support and connected with the first frame through the diaphragm support.

The loudspeaker of the embodiment of the utility model utilizes the blocking structure which is arranged on the inner side of the shell and opposite to the vibrating diaphragm to limit the depression of the vibrating diaphragm to the inner side of the shell when the vibrating diaphragm is collided or pressed with water. Therefore, the diaphragm is prevented from being torn due to excessive deformation, and other parts in the loudspeaker are further protected from being damaged.

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 schematic view of a loudspeaker according to an embodiment of the utility model;

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

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 1 illustrating an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 1 of an embodiment of the present invention;

FIG. 5 is a schematic structural view of a housing of an embodiment of the present invention;

fig. 6 is an assembly diagram of the magnetic bowl, the spring plate and the weight block according to the embodiment of the utility model.

Description of reference numerals:

1-a shell; 11-a barrier structure; 12-shell bottom; 13-shell wall; 131-a diaphragm support; 132-a first frame; 133-a second frame; 14-a first window; 15-a second window;

2-vibrating diaphragm; 21-a recess; 22-middle paste; 23-a voice coil former;

3-a voice coil; 31-a lead; 32-terminal;

4-a magnetic circuit system; 41-magnetic bowl; 411-bowl bottom; 411 a-notch; 412-bowl wall; 42-a magnet; 43-washer; 44-a counterweight block; 441-first portion; 442-a second portion; 45-spring plate; 451-an extension portion; a-voice coil avoiding area; b-a lead avoiding region.

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. It will be apparent to one 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.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Spatially relative terms, such as "inner," "outer," "below," "lower," "above," "upper," and the like, are used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Fig. 1 is an exploded schematic view of a speaker according to an embodiment of the present invention, fig. 2 is a schematic view of a bottom structure of the speaker, fig. 3 and fig. 4 are sectional views of a direction a-a and a direction B-B in fig. 1 (parts are omitted in fig. 4), as shown in fig. 1-4, the speaker according to an embodiment of the present invention includes a diaphragm 2, a magnetic circuit 4, a voice coil 3, and a housing 1, where the magnetic circuit 4 is used to form a magnetic gap, the voice coil 3 is disposed in the magnetic gap and connected to the diaphragm 2, the housing 1 has a blocking structure 11, a housing bottom 12, and a housing wall 13 surrounding the housing bottom 12, an end surface of the housing wall 13 is connected to an outer edge of the diaphragm 2, the housing 1 is used to house the magnetic circuit 4 and the voice coil 3, the blocking structure 11 is spaced from the diaphragm 2, and the blocking structure 11 is disposed relative to at least a partial region of the diaphragm 2. The blocking structure 11 is configured to limit the diaphragm 2 and prevent the blocking structure 11 from escaping from the voice coil 3 when the diaphragm 2 is depressed toward the inside of the housing 1 by an external force.

The loudspeaker of the embodiment utilizes the blocking structure 11 which is arranged on the inner side of the shell 1 and is opposite to the vibrating diaphragm 2 to limit the depression of the vibrating diaphragm 2 generated on the inner side of the shell 1 when the vibrating diaphragm is collided or pressurized. Therefore, the diaphragm 2 is prevented from being torn due to excessive deformation. Meanwhile, when a partial region of the diaphragm 2 is limited by the blocking structure 11 to move downwards, the downward movement of other regions of the diaphragm 2 which are not limited by the blocking structure 11 is also limited, so that other parts in the loudspeaker are prevented from being damaged.

It is easy to understand that the speaker of the present embodiment can be applied to portable electronic devices such as notebook computers, mobile phones, or smart watches. Use the smart watch as an example, when the user wears the smart watch that is equipped with the speaker in this embodiment and dives, vibrating diaphragm 2 surface receives water pressure can be sunken to the inside of speaker, and when the subregion of vibrating diaphragm 2 contacted barrier structure 11, vibrating diaphragm 2 in this region can stop to continue to move down, and the water pressure that acts on this part vibrating diaphragm 2 can be absorbed by barrier structure 11. Meanwhile, the part of the diaphragm 2 can play a certain pulling role on the diaphragms 2 in other areas (the diaphragm 2 not in contact with the blocking structure 11), so that internal parts of the loudspeaker are protected. The material of the diaphragm 2 may be silica gel, polyurethane, or metal alloy.

As shown in fig. 3, further, the diaphragm 2 has a recess 21 that is recessed toward the inside of the housing 1, and the blocking structure 11 is disposed with respect to the recess 21. Fig. 1 and 3 show a loudspeaker with a flat diaphragm 2, whose diaphragm 2 radiates sound waves directly outwards in total vibration. The outer fringe and the 1 terminal surface of casing of plane vibrating diaphragm 2 are fixed, and when plane vibrating diaphragm 2 vibrated from top to bottom, vibrating diaphragm 2 can receive transversely to be dragged on the horizontal direction, for compensating this motion, be provided with depressed part 21 on vibrating diaphragm 2 in this embodiment, this depressed part 21 can compensate the deformation of vibrating diaphragm 2 on the horizontal direction when vibrating diaphragm 2 moves. However, the recessed area also results in insufficient pressure-bearing capacity, for example, when the diaphragm 2 is subjected to water pressure, the recess 21 is preferentially depressed by the pressure. For this reason, the position where the barrier structure 11 of the present embodiment is disposed is located below the recessed portion, so that the barrier structure 11 preferentially protects the portion.

Fig. 5 is a schematic structural diagram of the casing, as shown in fig. 1-5, further, the recess 21 is disposed around the central region of the diaphragm 2, and the blocking structure 11 is disposed around the casing wall 13 and extends toward the voice coil 3. The voice coil 3 is usually disposed at the center of the diaphragm 2 as an important part for driving the diaphragm 2 to vibrate, so that the vibration can be uniformly transmitted to each region of the diaphragm 2. For this purpose, the recess 21 in this embodiment is provided in the peripheral region of the diaphragm 2, and the barrier structure 11 opposite the recess 21 is also provided around the housing wall 13. While the barrier structure 11 also avoids the voice coil 3 in the central region of the loudspeaker. Fig. 5 shows the blocking structure 11 disposed on the housing wall 13, where the area a is an area for avoiding the voice coil 3, and the blocking structure 11 in this area is hollow for avoiding the voice coil 3.

As shown in fig. 3, in some embodiments, the speaker further includes a middle sticker 22, where the middle sticker 22 is attached to the central region of the diaphragm 2 and the voice coil 3 is connected to the diaphragm 2 through the middle sticker 22. Wherein at least a partial area of the middle patch 22 is arranged with respect to the barrier structure 11. The middle paste 22 arranged in the loudspeaker can increase the overall rigidity of the vibrating diaphragm 2, and in the embodiment, the rigidity of the middle paste 22 is utilized, so that when the middle paste 22 is concave along with the vibrating diaphragm 2, the peripheral area of the middle paste 22 can fall on the blocking structure 11, the falling of the central area of the vibrating diaphragm 2 is further limited, and the internal parts of the loudspeaker are protected from being extruded. It should be understood that the concave restriction of the central region of the diaphragm 2 in this embodiment is different from the above embodiment, and this embodiment utilizes the rigidity of the middle paste 22 disposed in the central region of the diaphragm 2, so as to better support the central region of the diaphragm 2.

Further, the speaker further includes a voice coil support 23, and the voice coil 3 is connected to the middle sticker 22 through the voice coil support 23. The magnetic circuit system 4 comprises a magnetic bowl 41, a magnet 42 and a washer 43, wherein the magnetic bowl 41 is provided with a bowl bottom 411 and a bowl wall 412 arranged around the edge of the bowl bottom 411, the magnet 42 is fixed on the inner side of the bowl bottom 411, the washer 43 is fixed on the top of the magnet 42, and a magnetic gap is formed between the washer 43 and the inner side of the bowl wall 412. Wherein the voice coil support 23 is configured such that when the middle paste 22 contacts the blocking structure 11, the voice coil support 23 is spaced from the bowl bottom 411.

In order to fit the external shape of a product, the design direction of a speaker, particularly a speaker provided in a portable electronic device, is designed to be thinner, but the distance from the diaphragm 2 of the speaker to the bowl bottom 411 is also shortened. Meanwhile, the voice coil 3 is located in the magnetic gap in the housing 1 and is connected to the diaphragm 2. In the prior art, the voice coil support 23 is connected with the diaphragm 2 and the voice coil 3, so that the effective length of the voice coil 3 at the magnetic circuit part is ensured. However, when the diaphragm 2 is subjected to an external pressure, the voice coil bobbin 23 moves toward the bowl bottom 411, and thus a collision occurs. In this embodiment, the blocking structure 11 is used to limit the downward movement of the middle sticker 22, so that the downward movement of the voice coil bracket 23 connected to the middle sticker 22 is also limited, and the voice coil bracket 23 is prevented from directly colliding with the bowl bottom 411. For this reason, the voice coil support 23 in this embodiment is configured such that, when the diaphragm 2 is in an uncompressed state, the distance between the middle sticker 22 and the blocking structure 11 in the height direction is smaller than the distance between the bottom of the voice coil support 23 and the bowl bottom 411, so as to ensure that the bottom of the voice coil support 23 and the bowl bottom 411 still have a certain distance when the middle sticker 22 is attached to the blocking structure 11.

As shown in fig. 1-3, in some embodiments, the speaker further includes a weight 44 and a spring 45, the weight 44 is fixed outside the magnetic circuit 4, and one end of the spring 45 is connected to the housing 1 and the other end is connected to the magnetic circuit 4 and/or the weight 44. The magnetic circuit 4 and the weight 44 are spaced from the housing 1, and the elastic force of the spring 45 is configured to make the magnetic circuit 4 and the weight 44 have a degree of freedom to move in the housing, and not to contact the housing 1, and also to transmit the acceleration of the magnetic circuit 4 to the housing 1 through the spring 45.

The vibration function of the speaker in the prior art is to suspend the magnetic circuit system 4 in the speaker housing 1, and when the voice coil 3 is subjected to an ampere force, the magnetic circuit system 4 is also subjected to a reaction force (i.e. an acceleration in the embodiment) of the voice coil 3 to generate vibration. The weight 44 provided in this embodiment can add inertia to the magnetic circuit system 4, thereby improving the vibration sensation applied to the skin of the user. Meanwhile, the elastic force of the elastic sheet 45 is configured to ensure that the magnetic circuit system 4 and the counterweight block 44 do not collide with the housing 1 when moving in the housing 1. Optionally, when the diaphragm 2 is depressed by a pressure, the distance between the voice coil support 23 and the bowl bottom 411 is reduced, and at this time, in order to avoid contact with the vibrating magnetic bowl 41, the elastic force of the elastic piece 45 and the height setting of the voice coil support 23 may be further configured, so that when the magnetic bowl 41 moves upward to a maximum distance under the action of the elastic force, the magnetic bowl cannot contact with the bottom of the voice coil support 23.

Preferably, a person skilled in the art can adjust the material, size and other parameters of the weight 44 and the elastic sheet 45, so that the resonant frequency of the magnetic circuit system 4 and the weight 44 disposed thereon reaches the vibration frequency that can be sensed by the skin of a human body, thereby effectively improving the vibration sense. Taking the weight block 44 as an example, tungsten alloy with the equal density of more than 8.0g/cm can be adopted³The metal alloy of (2) thus realize small, big weight, effectively improve the product acceleration, increase the vibration effect when wearing.

Alternatively, the loudspeaker can also be used as a vibration motor when a significant vibration is generated under low-frequency vibration due to the low resonant frequency of the magnetic circuit system 4. In the middle-high frequency band, the vibration of the magnetic circuit system 4 is not obvious, the vibration of the acoustic vibration system is obvious, and the loudspeaker can be used for realizing the audio sounding function.

Fig. 6 is a schematic structural diagram of the magnetic bowl 41, the elastic sheet 45 and the weight block 44, as shown in fig. 3-6, further, the magnetic circuit system 4 includes the magnetic bowl 41, and the magnetic bowl 41 has a bowl bottom 411 and a bowl wall 412 disposed around an edge of the bowl bottom 411. The weight 44 has a first portion 441 and a second portion 442, the first portion 441 and the second portion 442 are disposed outside the bowl wall 412 and surround the bowl wall 412, the top of the first portion 441 and the end surface of the bowl wall 412 are at the same height, and the bottom of the second portion 442 and the outside of the bowl bottom 411 are at the same height. The elastic piece 45 is disposed around the outer side of the bowl wall 412 and between the first portion 441 and the second portion 442, wherein a partial area of the elastic piece 45 is in contact with both the first portion 441 and the second portion 442, the elastic piece 45 has an extension portion 451, and the extension portion 451 is connected to the shell wall 412. Magnetic bowl 41 and weight 44 move without contacting blocking structure 11 and housing bottom 12. Meanwhile, the acceleration in the above embodiment can be transmitted through the contact areas of the elastic sheet 45 and the first portion 441 and the second portion 442.

The weight 44 in this embodiment is divided into two parts respectively located at the upper part and the lower part of the elastic piece 45, and the first part 441 and the second part 442 are respectively level with the upper end face and the lower end face of the magnetic bowl 41 in the height direction, so that the weight 44 is prevented from colliding with the housing 1. Fig. 3, 4 and 6 show a state where the upper and lower surfaces of a partial region of the elastic piece 45 are held by the first portion 441 and the second portion 442, a gap is formed between the elastic piece 45 and the bowl wall in the longitudinal direction of the speaker (as shown in fig. 3), the upper and lower surfaces of the elastic piece 45 are respectively in contact with the first portion 441 and the second portion 442 in the width direction, and the inner ring of the elastic piece 45 is in contact with the bowl wall 412 (as shown in fig. 4 and 6). At this time, the elastic force in the vertical direction generated by the elastic piece 45 is directly transmitted to the magnetic circuit system 4 through the positions held by the first portion 441 and the second portion 442. It should be understood that the position of the extension portion 451 and the position where the elastic piece 45 is clamped are offset by a certain angle in the horizontal direction in the present embodiment, and the clamped area is fixed so as to hardly generate deformation, so that it is necessary to provide the deformation required for generating the elastic force to the extension portion 451 and the elastic piece 45 in the area between the extension portion 451 and the clamped position. The extension parts 451 in fig. 6 are located at the middle positions on the left and right sides of the magnetic circuit system 4, and the held regions of the spring pieces are located at the front and rear positions of the magnetic circuit system 4, so that the extension parts 451 and the held regions are displaced as much as possible in a limited space.

As shown in fig. 1-5, in some embodiments, the speaker further includes a terminal 32 and a lead 31 connected to the voice coil 3, the housing 1 has a first window 14, the first window 14 faces the case bottom 12, and the terminal 32 is disposed at the position of the first window 14. The first portion 441 and the bowl wall 412 are respectively provided with notches 411a facing the direction of the barrier structure 11, and the lead 31 is connected to the terminal 32 through the notches 411 a. The speaker of the present embodiment can be electrically connected to the outside through the first window 14 and the terminal 32 provided at this position, thereby feeding power to the speaker. The first window 14 in fig. 2 is arranged to face downwards the housing 1 in order to facilitate connection of a feeding point of the portable electronic device to which the loudspeaker is mounted. The magnetic bowl 41 and the weight 44 are further provided with a notch 411a, and the notch 411a can guide the lead 31 when the lead 31 is connected to the terminal 32 located in the housing 1, so that the lead 31 is prevented from randomly running in the space and generating speaker noise when the speaker vibrates, and pulling on the voice coil 3 is reduced. And the lead 31 between the end surface of the magnetic bowl 4 and the blocking structure 11 is not squeezed when the magnetic bowl 41 is closer to the blocking structure 11.

As shown at B in fig. 4 and 5, optionally, the blocking structure 11 may further be provided with a lead wire avoiding region B, which is disposed opposite to the notch 411a below, and may further function to avoid the lead wire 31 when the voice coil 3 moves up and down, so that even if the lead wire 31 moves up and jumps along with the voice coil 3, the lead wire 31 does not interfere with the blocking structure 11.

As shown in fig. 2, in some embodiments, the housing 1 has a second window 15, the second window 15 communicating to the inside of the housing 1, the second window 15 being located at the position of the housing bottom 12 and/or the position of the housing wall 13 relative to the blocking structure 11. Along with the vibration of vibrating diaphragm 2 in the work of speaker, the space in the speaker also can change thereupon, and second window 15 of this embodiment is towards the inboard of speaker for the inner space of speaker switches on with the outside, thereby keeps the stability of speaker internal pressure, has further guaranteed that vibrating diaphragm 2 can stable vibration. Wherein a second window 15 located at the position of the bottom 12 of the housing is accessible to the interior of the portable mobile device, which position is preferentially permeable to air for the area below the barrier structure 11. The second window, which is located at the position of the wall 13 relative to the barrier structure 11, allows to conduct air to the space above as well as below the barrier structure 11.

As shown in fig. 5, in some embodiments, the shell wall 13 includes a diaphragm support 131, a first frame 132 and a second frame 133, the first frame 132 is connected to the shell bottom 12 through the second frame 133, the blocking structure 11 is located on the first frame 132, and the edge of the diaphragm 2 is wrapped on the diaphragm support 131 and connected to the first frame 132 through the diaphragm support 131. The housing 1 of the present embodiment is divided into a plurality of portions in the height direction so that the components inside the housing 1 are sequentially mounted from the bottom up. Wherein the outer edge of the diaphragm 2 is wrapped at the top and the side wall of the diaphragm support 131, and the two parts are tightly attached to each other to achieve a good waterproof effect.

Preferably, in order to improve the waterproof performance of the speaker, the diaphragm 2 and the diaphragm holder 131 in this embodiment may be alternatively formed in an integrated body in manufacturing. For example, Metal Injection Molding (MIM) is used. This technique is a molding method in which a plasticized mixture of metal powder and its binder is injected into a mold. The product not only has the same complex shape and high precision as the product obtained by the plastic injection molding method, but also has the physical, chemical and mechanical properties close to those of a forged piece. The process technology is suitable for mass production of small-sized, precise and metal parts with complex three-dimensional shapes and special performance requirements. Therefore, the technology can ensure the formation of the complex curved surface of the vibrating diaphragm 2, and can also ensure the requirements of the vibrating diaphragm 2 on mechanical strength, sealing property and the like.

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 in the protection scope of the present invention.

Claims (10)

1. A loudspeaker, characterized in that the loudspeaker comprises:

a diaphragm (2);

a magnetic circuit system (4) for forming a magnetic gap;

the voice coil (3) is arranged in the magnetic gap and is connected with the diaphragm (2);

the loudspeaker comprises a shell (1) and a loudspeaker, wherein the shell (1) is provided with a blocking structure (11), a shell bottom (12) and a shell wall (13) surrounding the shell bottom (12), the end surface of the shell wall (13) is connected to the outer edge of a vibrating diaphragm (2), the shell (1) is used for accommodating a magnetic circuit system (4) and a voice coil (3), the blocking structure (11) is arranged at an interval with the vibrating diaphragm (2), and the blocking structure (11) is arranged relative to at least part of the area of the vibrating diaphragm (2);

wherein the blocking structure (11) is configured to limit the diaphragm (2) when the diaphragm (2) is depressed towards the inner side of the housing (1) by an external force, and the blocking structure (11) is avoided from the voice coil (3).

2. A loudspeaker according to claim 1, wherein the diaphragm has a recess (21) recessed towards the inside of the housing (1), the barrier structure (11) being arranged opposite the recess (21).

3. A loudspeaker according to claim 2, wherein the recess (21) is arranged around a central region of the diaphragm (2);

the blocking structure (11) is arranged around the shell wall (13) and extends towards the voice coil (3).

4. The speaker of claim 3, further comprising: the middle paste (22), the middle paste (22) is pasted in the central area of the vibrating diaphragm (2), and the voice coil (3) is connected with the vibrating diaphragm (2) through the middle paste (22);

wherein at least a partial region of the central patch (22) is arranged relative to the barrier structure (11).

5. The speaker of claim 4, further comprising:

the voice coil support (23), the said voice coil (3) is connected with said middle paste (22) through the said voice coil support (23);

the magnetic circuit system (4) comprises a magnetic bowl (41), a magnet (42) and a washer (43), wherein the magnetic bowl (41) is provided with a bowl bottom (411) and a bowl wall (412) arranged around the edge of the bowl bottom (411), the magnet (42) is fixed on the inner side of the bowl bottom (411), the washer (43) is fixed on the top of the magnet (42), and the magnetic gap is positioned between the washer (43) and the inner side of the bowl wall (412);

wherein the voice coil support (23) is configured such that when the middle sticker (22) is in contact with the blocking structure (11), the voice coil support (23) has a space from the bowl bottom (411).

6. The speaker of claim 1, further comprising: the balancing weight (44) is fixed on the outer side of the magnetic circuit system (4), one end of the elastic sheet (45) is connected to the shell (1) and the other end of the elastic sheet is connected to the magnetic circuit system (4) and/or the balancing weight (44);

wherein the magnetic circuit system (4) and the counterweight (44) are spaced from the housing (1), the elastic force of the elastic sheet (45) is configured to enable the magnetic circuit system (4) and the counterweight (44) to have freedom of movement in the housing (1) and not to contact with the housing (1), and the acceleration of the magnetic circuit system (4) is transmitted to the housing (1) through the elastic sheet (45).

7. A loudspeaker according to claim 6, wherein the magnetic circuit system (4) comprises a magnetic bowl (41), the magnetic bowl (41) having a bowl bottom (411) and a bowl wall (412) arranged around an edge of the bowl bottom (411);

the counterweight block (44) is provided with a first part (441) and a second part (442), the first part (441) and the second part (442) are arranged on the outer side of the bowl wall (412) and surround the outer side of the bowl wall (412), the top of the first part (441) is at the same height with the end surface of the bowl wall (412), and the bottom of the second part (442) is at the same height with the outer side of the bowl bottom (411);

the spring plate (45) is arranged to surround the bowl wall (412) and located between the first portion (441) and the second portion (442), a partial area of the spring plate (45) is in contact with the first portion (441) and the second portion (442), the spring plate (45) has an extension portion (451), and the extension portion (451) is connected to the shell wall (13);

the magnetic bowl (41) and the counterweight (44) do not contact the blocking structure (11) and the shell bottom (12) when moving;

wherein the acceleration is transmitted through the contact area of the spring (45) with the first portion (441) and the second portion (442).

8. The speaker of claim 7, further comprising: a terminal (32) and a lead (31) connected to the voice coil (3);

the housing (1) has a first window (14), the first window (14) faces the housing bottom (12), and the terminal (32) is arranged at the position of the first window (14);

the first part (441) and the bowl wall (412) are respectively provided with a notch (411a) facing the direction of the blocking structure (11), and the lead (31) is connected with the terminal (32) through the notch (411 a).

9. A loudspeaker according to claim 1, characterized in that the housing (1) has a second window (15), which second window (15) is connected to the inside of the housing (1), which second window (15) is located at the position of the housing bottom (12) and/or the position of the housing wall (13) relative to the blocking structure (11).

10. A loudspeaker according to claim 8, wherein the housing wall (13) comprises a diaphragm support (131), a first frame (132) and a second frame (133), the first frame (132) being connected to the housing bottom (12) by the second frame (133), the barrier structure (11) being located on the first frame (132), the edge of the diaphragm (2) being wrapped over the diaphragm support (131) and being connected to the first frame (132) by the diaphragm support (131).

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