CN203708479U

CN203708479U - Loudspeaker

Info

Publication number: CN203708479U
Application number: CN201420050706.4U
Authority: CN
Inventors: 江超; 杨健斌; 李志�
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2014-01-26
Filing date: 2014-01-26
Publication date: 2014-07-09
Anticipated expiration: 2024-01-26

Abstract

The utility model provides a loudspeaker comprising at least four vibrating diaphragms, internal connecting rods, external connecting rods and a cavity seal housing. Separated vibrating diaphragms form a vibrating diaphragm group, and the two groups of vibrating diaphragms are in relative movement. The DOME of each vibrating diaphragm is provided with a connecting point separately. The internal connecting rods are connected with the vibrating diaphragms through the connecting points on the DOMEs. The internal connecting rods connected with the separated vibrating diaphragms are connected through an external connecting rod. The internal connecting rods connected with adjacent vibrating diaphragms are connected through different external connecting rods. Cavities of the loudspeaker are formed between adjacent vibrating diaphragms. Separated cavities form a front sound cavity of the loudspeaker, and a cavity which is adjacent to the front sound cavity forms a rear sound cavity of the loudspeaker. The cavity seal housing is used to seal the front sound cavity/the rear sound cavity to make the front cavity and the rear cavity of the loudspeaker separated from each other. The loudspeaker can be used to ensure that the connecting rods of the loudspeaker do not pass through the vibrating diaphragms, so the air leakage problem does not exist, and the acoustic performance is good.

Description

Loudspeaker

Technical Field

The utility model relates to an acoustics field, more specifically relates to a speaker.

Background

Woofers are increasingly used in daily life as sound-producing devices with good bass characteristics. In the product design, because sufficient acoustic power needs to be radiated in a low frequency band, the area of the diaphragm and the volume of the whole product are large, and the size in a certain direction needs to be reduced as much as possible on the basis of ensuring the performance of the loudspeaker when the diaphragm is applied to thin electronic devices such as liquid crystal televisions, notebook computers and the like so as to meet the requirements of the thin electronic devices.

In order to reduce the resonant frequency of the loudspeaker and improve the sensitivity of the loudspeaker, a plurality of diaphragms are generally used in one loudspeaker, and the diaphragms are connected through connecting rods to realize optimization of electro-acoustic conversion. However, in the conventional speaker manufacturing process, the connection rod must penetrate through the diaphragms to achieve the connection between the diaphragms, which inevitably causes air leakage. If air leaks, poor sound quality such as distortion or noise occurs, further affecting the sound production effect of the speaker.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the utility model aims at providing a speaker can reduce the resonant frequency of speaker simultaneously in order to solve the problem of vibrating diaphragm gas leakage, improves sensitivity, reduces the preparation degree of difficulty of whole speaker.

The utility model provides a loudspeaker, which comprises at least 4 vibrating diaphragms, an inner connecting rod, an outer connecting rod and a cavity sealing shell; the two groups of diaphragms formed by all the diaphragms move relative to each other; the DOME of each vibrating diaphragm is respectively provided with a connecting point, the inner connecting rods are connected with the vibrating diaphragms through the connecting points on the DOME, the inner connecting rods connected with the spaced vibrating diaphragms are connected through the outer connecting rods, and the inner connecting rods connected with the adjacent vibrating diaphragms are connected through different outer connecting rods; the cavity of the loudspeaker is formed between adjacent vibrating diaphragms, the cavities at intervals form a front sound cavity of the loudspeaker, the cavities adjacent to the front sound cavity form a rear sound cavity of the loudspeaker, and the front sound cavity/the rear sound cavity are sealed by a cavity sealing shell, so that the front sound cavity and the rear sound cavity of the loudspeaker are separated.

Wherein the speaker further comprises a driving source; the vibrating diaphragms are 4 pieces, and the driving sources are positioned at two ends of the loudspeaker; the chamber body seal is disposed over the centrally located chamber.

Wherein, the interconnection connects the pole including short connecting rod and long connecting rod, and every vibrating diaphragm is connected with a set of short connecting rod or long connecting rod, and each vibrating diaphragm of looks spaced is connected through the interconnection and the outer connecting rod that links to each other with the interconnection pole.

Wherein, the inner connecting rod and the outer connecting rod are two groups.

Wherein, the short connecting rod is connected in the 0 ~ 1/4 region of the DOME major axis direction of vibrating diaphragm, and the long connecting rod is connected in the 1/4 ~ 1/2 region of the DOME major axis direction of vibrating diaphragm.

Wherein, looks spaced vibrating diaphragm links to each other through outer connecting rod and forms a set of vibrating diaphragm, and the driving source includes magnetic circuit, and magnetic circuit links to each other through a piece of vibrating diaphragm rather than adjacent and drives the motion of a set of vibrating diaphragm at this vibrating diaphragm place.

Wherein the driving source is a moving coil type driving source.

Wherein the driving source is electrically connected to an external circuit through the FPCB.

Wherein, be provided with centering piece in the below of the vibrating diaphragm of keeping away from the driving source.

Wherein, the vibrating diaphragm is a long vibrating diaphragm.

Utilize the aforesaid to according to the utility model discloses a loudspeaker can guarantee that the connecting rod of loudspeaker does not pass the vibrating diaphragm to there is not the problem of gas leakage, acoustic performance is more excellent, sets up the polarization that the centering piece can more effectual suppression loudspeaker in the vibrating diaphragm below of keeping away from the driving source in addition.

Drawings

Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description and appended claims, taken in conjunction with the accompanying drawings. In the drawings:

fig. 1 is a schematic cross-sectional view of a loudspeaker according to an embodiment of the present invention, in which the diaphragm is 4 pieces;

fig. 2 is a schematic structural diagram of a centering chip of a speaker according to an embodiment of the present invention.

Wherein the reference numerals include: the device comprises a magnetic circuit 1, a FPCB2, a vibrating diaphragm 3, an outer connecting rod 4, an inner connecting rod 5, a first shell 6, a second shell 7, a cavity sealing shell 8 and a centering support piece 10.

The same reference numbers in all figures indicate similar or corresponding features or functions.

Detailed Description

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the following description, for the purposes of illustration, in the following description of embodiments of the invention, the rigid part in the center of the diaphragm is collectively referred to as the "DOME".

Woofer needs great vibrating diaphragm area, for provide great vibrating diaphragm area on the basis of restriction voice coil loudspeaker voice coil and magnet size, the utility model discloses a speaker is from the angle of arranging a plurality of vibrating diaphragms, makes the vibrating diaphragm pass through the in-connection pole and the outer connecting rod is connected under the condition that does not pierce through self, solves the gas leakage problem, improves the acoustic performance of speaker.

Fig. 1 shows a cross-sectional structure of a loudspeaker according to the present invention when the diaphragm is 4 pieces.

As shown in fig. 1, the speaker of the present invention includes: the vibration isolator comprises a diaphragm 3, an FPCB2, an inner connecting rod 5, an outer connecting rod 4, a magnetic circuit 1 and a cavity sealing shell 8. Wherein,

the diaphragm includes a DOME (ball top) and a flexure portion. Diaphragm 3 of microscler structure is 4 pieces, parallel distribution mutually, alternate vibrating diaphragm forms a set of vibrating diaphragm, the two sets of vibrating diaphragms of the conformal formation of all vibrating diaphragms, relative motion between two sets of vibrating diaphragms, supreme first vibrating diaphragm that is respectively by lower, the second vibrating diaphragm, third vibrating diaphragm and fourth vibrating diaphragm, be provided with the tie point on the DOME of each vibrating diaphragm respectively, interconnection pole 5 links to each other with vibrating diaphragm 3 through the tie point on the DOME major axis direction, the interconnection pole that is connected with alternate vibrating diaphragm 3 is connected through an outer joint rod 4 between 5, the interconnection pole that is connected with adjacent vibrating diaphragm 3 is connected through different outer joint rods 4 between 5. It should be noted that the specific shape of the diaphragm with an elongated structure is not fixed, and may be designed and used according to specific needs.

The cavity of the loudspeaker is formed between the adjacent vibrating diaphragms, the spaced cavities jointly form a front sound cavity of the loudspeaker, the cavity adjacent to the front sound cavity forms a rear sound cavity of the loudspeaker, and the front sound cavity/the rear sound cavity are sealed by the cavity sealing shell, so that the front cavity and the rear cavity of the loudspeaker are separated. Wherein, the sealed shell of cavity sets up on the cavity that is located the centre that the vibrating diaphragm formed.

Additionally, the utility model provides a speaker still includes the driving source, and this driving source can be for moving coil formula driving source, and the theory of operation of moving coil is: a closed coil is in a magnetic field and when the magnetic flux through it changes, a current is generated and vice versa. The current flows through the coil to generate a magnetic field, and the magnetic field interacts with the permanent magnetic material at the bottom to push the vibration of the diaphragm, so that sound is generated.

Specifically, a connection point on one vibrating diaphragm 3 is arranged on a DOME major axis of the vibrating diaphragm, the vibrating diaphragms 3 located at odd numbers are connected with an inner connecting rod 5 through the connection point, and then all the vibrating diaphragms 3 located at odd numbers and connected with the inner connecting rod 5 are connected through an outer connecting rod 4 to form a first group of vibrating diaphragms; wherein, the internal connecting rod 5 includes short connecting rod and long connecting rod, and the distribution of short connecting rod and long connecting rod in first group vibrating diaphragm is crisscross each other.

Wherein, the tie point setting on the vibrating diaphragm is in the major axis direction of the DOME of vibrating diaphragm, and there can be two, also can have one. Under the condition that has two tie points, the installation of in-connection pole and outer connecting rod is symmetrical, in addition, also can be under the circumstances of guaranteeing the normal work of vibrating diaphragm, sets up a tie point, and the unilateral condition of using the connecting rod promptly, every vibrating diaphragm is connected with an in-connection pole, saves raw and other materials, alleviates speaker weight.

In addition, the vibrating diaphragms 3 positioned at the even numbers are connected with the inner connecting rods 5 through the connecting points, and then all the vibrating diaphragms 3 positioned at the even numbers and connected with the inner connecting rods 5 are connected through the outer connecting rods 4 to form a second group of vibrating diaphragms; wherein, the distribution of the long connecting rods and the short connecting rods of the internal connecting rods 5 in the second group of diaphragms are staggered.

Because the theory of operation of speaker mainly relies on the vibration of vibrating diaphragm 3 to produce sound, and vibrating diaphragm 3 has some non-piston vibration modes when the vibration, places the connecting rod and can effectively restrain the swing mode and the bending vibration mode of vibrating diaphragm in the different positions of the DOME of vibrating diaphragm.

It should be noted that, in the case that the inner connecting rods 5 are paired, the number of pairs of the inner connecting rods 5 is the same as the number of the diaphragms 3. For example, if six diaphragms 3 are used in one speaker, the number of inner connecting rods 5 is six. At the same time, the outer tie bars 4 also appear in pairs, i.e. the number of outer tie bars 4 is two. The utility model discloses in, owing to divide into groups according to the parity position of vibrating diaphragm, consequently the group number of vibrating diaphragm 3 is two sets of, and the quantity of so outer connecting rod 4 also is two sets of. Under the condition of using the unilateral rods, the number of the internal connecting rods is determined according to the number of the vibrating diaphragms, and the external connecting rods are in one group and are respectively connected with the internal connecting rods connected with the vibrating diaphragms of different groups.

Because the outer connecting rod 4 is adopted to communicate the front cavity and the rear cavity of the loudspeaker, a cavity sealing shell 8 must be added, namely the cavity sealing shell 8 is arranged at the position where the outer connecting rod 4 is connected with the inner connecting rod 5 positioned in the front cavity of the loudspeaker, so that the front cavity and the rear cavity of the loudspeaker are separated.

In addition, in order to reduce the polarization amplitude of the diaphragm of the loudspeaker, a centering disk 10 is arranged below the diaphragm far away from the driving source, the number of the centering disks 10 is two, the centering disks 10 are respectively arranged below the two diaphragms far away from the driving source in each group of diaphragms, and compared with the mode that the centering disk 10 is arranged below the diaphragm close to the driving source, the polarization of the loudspeaker can be more effectively inhibited.

The utility model discloses an in the concrete embodiment of speaker, the driving source includes magnetic circuit and voice coil loudspeaker voice coil, wherein magnetic circuit 1 appears in groups and is a set of at least, set up respectively in the below of first vibrating diaphragm and the top of fourth vibrating diaphragm, be connected with the DOME of two adjacent vibrating diaphragms 3 through the voice coil loudspeaker voice coil skeleton respectively, it is required to explain, under the circumstances that speaker inner space allows, can set up multiunit magnetic circuit 1 and drive jointly, can effectively restrain the polarization of vibrating diaphragm, sensitivity is improved, and simultaneously, the volume of magnet in the magnetic circuit reduces, and the cost also can reduce.

The utility model discloses a FPCB2 for connecting voice coil loudspeaker voice coil lead wire and shell in the embodiment of speaker is rectangular shape, is provided with the circuit at its tip, is connected with external circuit, and FPCB 2's one end is provided with the pad, and the voice coil loudspeaker voice coil lead wire bonds on the DOME of the vibrating diaphragm 3 that is close to magnetic circuit 1 to be connected with FPCB 2's one end through the pad, FPCB 2's the other end and relevant shell are connected, and then are connected with external circuit. Both ends of the FPCB2 are bent in an arc structure to a position parallel to the mounting plane. This structure of the FPCB2 can make full use of the internal space of the woofer and avoid disconnection due to the pulling of the lead wire during vibration of the diaphragm.

On the basis of the structure, the utility model discloses a theory of operation of speaker is as follows briefly:

the vibration diaphragms connected with each other are driven to move through a magnetic circuit at one end of the loudspeaker, and because DOME of the vibration diaphragms is connected with the inner connecting rods through the connecting points arranged on the DOME, and meanwhile, the inner connecting rods are connected with the corresponding outer connecting rods, a plurality of vibration diaphragms spaced from the vibration diaphragms also move, the moving directions are the same, and the moving amplitudes are the same; similarly, the magnetic circuit at the other end of the loudspeaker drives the adjacent vibrating diaphragms to move, and the plurality of vibrating diaphragms separated from the magnetic circuit are also made to move through the connection of the inner connecting rod and the outer connecting rod, and the moving directions are the same, and the moving amplitudes are the same. The motion between each adjacent vibrating diaphragm is relative to play the vocal effect, the resonant frequency of speaker also reduces, and the bass effect is better.

Specifically, the utility model discloses a speaker embodiment has four vibrating diaphragms 3, and this four vibrating diaphragms are first vibrating diaphragm, second vibrating diaphragm, third vibrating diaphragm and fourth vibrating diaphragm respectively from the ascending direction definition down. Wherein, the first vibrating diaphragm and the third vibrating diaphragm of one side position of four vibrating diaphragms are connected through an outer connecting rod 4, and second vibrating diaphragm and fourth vibrating diaphragm are connected through another outer connecting rod, and corresponding other one side is connected according to the same mode. With the interconnection that the vibrating diaphragm 3 of connecting on same outer joint pole 4 is connected connect the pole 5 long short alternate arrangement, when the interconnection that first vibrating diaphragm is connected connects pole 4 and is the short connecting rod, the interconnection that is connected with the third vibrating diaphragm connects pole 4 and is the long connecting rod promptly. In addition, the short connecting rods connected with the first vibrating diaphragm are connected in the region of 0-1/4 of the major axis direction of DOME2 of the first vibrating diaphragm, the long connecting rods connected with the second vibrating diaphragm are connected in the region of 1/4-1/2 of the major axis direction of DOME2 of the second vibrating diaphragm, and the conditions of the third vibrating diaphragm and the fourth vibrating diaphragm are the same. The inner connecting rods are arranged at different positions, so that the oscillation mode and the bending vibration mode of the diaphragm can be inhibited.

In order to reduce the resonant frequency of the speaker and improve the sound quality and the sensitivity of the speaker, a plurality of diaphragms 3 may be used in one speaker, but to ensure that the number of diaphragms is even, only four diaphragms are used as an example in the above embodiment, and similarly, 6 or 8 or more diaphragms may be used in one speaker to increase the effective radiation area, reduce the resonant frequency of the speaker and improve the sensitivity of the speaker.

In order to ensure the separation of the front and rear sound cavities of the speaker, in an embodiment of the present invention, a housing is required to be installed for use. Wherein, in the embodiment of the present invention, the first housing 6 is in a track shape and is provided with a 180-degree opening and a 90-degree opening on the arcs at both ends, and the second housing 7 is also in a track shape and is provided with a 90-degree opening on the arc at one end. The sequence of the three shells in the installation process is as follows: a first housing 6, a second housing 7, a first housing 6. The 180-degree opening and the 90-degree opening of the pair of first shells 6 correspond to each other respectively, the 90-degree opening of the second shell 7 and the 90-degree opening of the first shell 6 are staggered from each other, the second shell 7 forms a small rear sound cavity of a loudspeaker, the pair of first shells 6 forms a front sound cavity of the loudspeaker, the opening positions of the first shells 6 correspond to each other, and sound is emitted outwards through the two 180-degree openings.

The separated chambers, namely the chambers formed by the first shell 6 form a front sound cavity, the second shell 7 forms a rear sound cavity, and in order to realize the separation of the front sound cavity and the rear sound cavity of the loudspeaker, a cavity sealing shell 8 is arranged at the outer side position of the outer connecting rod 4 at one side. Specifically, the installation of the rear cavity shell enables the whole loudspeaker to form a large rear cavity, and the front cavity and the large rear cavity of the loudspeaker are communicated by using the outer connecting rod 4, so that a cavity sealing shell 8 is installed to enable the front cavity and the rear cavity to be separated.

In addition, in order to reduce the vibrating diaphragm polarization amplitude of the loudspeaker, a damper 10 is respectively arranged below the second vibrating diaphragm and the third vibrating diaphragm, and fig. 2 shows the structure of the damper according to the embodiment of the present invention. As shown in fig. 2, the centering disk 10 is connected to the DOME2 of the diaphragm 3 above the centering disk, and since the second diaphragm and the third diaphragm are far from the driving magnetic circuit compared with the first diaphragm and the fourth diaphragm, the effect of suppressing the polarization of the speaker is more obvious.

The magnetic circuits 1 as the driving source of the embodiment are a group and fixed through the mounting holes arranged on the housing, and each magnetic circuit 1 is connected with the DOME2 of the adjacent diaphragm through the voice coil bobbin, that is, a group of magnetic circuits 1 are respectively connected with the DOMEs of the first diaphragm and the fourth diaphragm. In the embodiment of the utility model, adopt the FPCB to carry out the electricity and connect drive unit and external circuit, compare in ordinary wire connected mode, adopt the FPCB can make manufacturing process simplify, save the inner space of speaker to can improve the stability of speaker.

It should be noted that, the magnetic circuit 1 can be provided with a plurality of groups, and the different forms of series-parallel connection are used as a driving source together, so that the polarization of the diaphragm 3 can be effectively inhibited, the sensitivity is improved, and meanwhile, the volume of the magnet in the magnetic circuit is reduced, and the cost is also reduced.

According to the above embodiment, the utility model provides a loudspeaker, the internal connection of adoption and outer connecting rod need not pass the vibrating diaphragm to there is not the problem of lou, and acoustic performance is more excellent, and the preparation degree of difficulty reduces. Further, the position where the damper is attached is away from the drive source, and polarization of the speaker can be suppressed more effectively.

A loudspeaker according to the invention is described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the loudspeaker of the present invention described above without departing from the scope of the invention. Therefore, the scope of the present invention should be determined by the content of the appended claims.

Claims

1. A loudspeaker is characterized by comprising at least 4 vibrating diaphragms, an inner connecting rod, an outer connecting rod and a cavity sealing shell; wherein,

the spaced vibrating diaphragms form a group of vibrating diaphragms, and the two groups of vibrating diaphragms formed by all the vibrating diaphragms move relative to each other; the DOME of each vibrating diaphragm is respectively provided with a connecting point, the inner connecting rods are connected with the vibrating diaphragms through the connecting points on the DOME, the inner connecting rods connected with the spaced vibrating diaphragms are connected through the outer connecting rods, and the inner connecting rods connected with the adjacent vibrating diaphragms are connected through different outer connecting rods;

the cavity of the loudspeaker is formed between adjacent vibrating diaphragms, the cavities at intervals form a front sound cavity of the loudspeaker, the cavities adjacent to the front sound cavity form a rear sound cavity of the loudspeaker, and the cavity sealing shell seals the front sound cavity/the rear sound cavity to separate the front sound cavity from the rear sound cavity of the loudspeaker.

2. The loudspeaker of claim 1,

the speaker further includes a driving source;

the vibrating diaphragms are 4 pieces, and the driving sources are positioned at two ends of the loudspeaker;

the cavity seal housing is disposed over the centrally located chamber.

3. A loudspeaker according to claim 1 or 2, wherein the inner connecting rod comprises a short connecting rod and a long connecting rod, each diaphragm being connected to a group of the short connecting rods or the long connecting rods, the spaced diaphragms being connected by the inner connecting rod to the outer connecting rod connected to the inner connecting rod.

4. A loudspeaker according to claim 3, wherein the inner and outer connecting rods are both two sets.

5. The loudspeaker of claim 4, wherein the short connecting rods are connected in the region of 0 to 1/4 of the diaphragm in the direction of the DOME major axis, and the long connecting rods are connected in the region of 1/4 to 1/2 of the diaphragm in the direction of the DOME major axis.

6. A loudspeaker as claimed in claim 2, characterized in that the drive source comprises a magnetic circuit which, by means of a diaphragm adjacent thereto, drives the movement of a group of diaphragms in which the diaphragm is located.

7. The loudspeaker of claim 2 wherein the drive source is a moving coil drive source.

8. The speaker of claim 7, wherein the driving source is electrically connected to an external circuit through the FPCB.

9. A loudspeaker as claimed in claim 2, characterized in that a centring disk is provided below the diaphragm remote from the drive source.

10. A loudspeaker as claimed in claim 1 or 2, characterized in that the diaphragm is an elongated diaphragm.