CN219659909U - Loudspeaker - Google Patents

Abstract

The utility model belongs to the technical field of speakers and discloses a speaker, which comprises a shell, a vibrating structure, a magnetic circuit structure, a voice coil and an elastic pad, wherein a first support arm is arranged on the shell, the vibrating structure is connected with the shell, the magnetic circuit structure is arranged in the shell and is arranged at intervals with the shell, a second support arm is arranged on the magnetic circuit structure, the voice coil is connected with the vibrating structure and can move along a first direction relative to the magnetic circuit structure, and the elastic pad is clamped between the first support arm and the second support arm in a direction perpendicular to the first direction. In the utility model, the magnetic circuit structure is arranged in the shell through the elastic pad, so that the magnetic circuit structure has a resonant frequency relative to the loudspeaker, the acting force of the magnetic circuit structure on the shell is reduced when the loudspeaker works, and the elastic pad is clamped between the first support arm of the shell and the second support arm of the magnetic circuit structure in the direction perpendicular to the first direction, so that the deflection amplitude of the magnetic circuit structure in the direction perpendicular to the first direction is reduced.

Description

Loudspeaker

Technical Field

The utility model relates to the technical field of speakers, in particular to a speaker.

Background

The inside space of vibrating structure on the speaker is as back chamber, be provided with voice coil loudspeaker voice coil, the pole piece, magnet and yoke in the back chamber, wherein, voice coil loudspeaker voice coil is connected in vibrating structure, the pole piece, magnet and yoke constitute magnetic circuit structure, connect in supporting vibrating structure's shell, when the intercommunication alternating current, the voice coil loudspeaker voice coil can drive vibrating structure vibration sound production under the ampere effect, at this moment, magnetic circuit structure that pole piece, magnet and yoke constitute can receive a reverse effort, its size equals with the ampere force that the voice coil loudspeaker voice coil received, the opposite direction, this reverse effort can finally be conducted to on the shell of speaker, lead to the shell to produce unnecessary vibration, lead to the impaired of tone quality, influence consumer's use impression.

Disclosure of Invention

The utility model aims to provide a loudspeaker, which can reduce the acting force of a magnetic circuit structure on a shell when in sounding operation.

To achieve the purpose, the utility model adopts the following technical scheme:

a speaker, comprising:

the shell is provided with a first support arm;

a vibrating structure connected to the housing;

the magnetic circuit structure is arranged in the shell and is arranged at intervals with the shell, and a second support arm is arranged on the magnetic circuit structure;

a voice coil connected to the vibration structure and movable in a first direction with respect to the magnetic circuit structure;

and the elastic pad is clamped between the first support arm and the second support arm in the direction perpendicular to the first direction.

Preferably, the device further comprises an outer cover, wherein the outer cover is provided with a containing cavity penetrating along the first direction, the vibration structure is connected to one end opening of the containing cavity, and the outer cover is connected to the other end opening of the containing cavity.

Preferably, the outer cover is provided with a ventilation opening.

Preferably, the ventilation opening and the magnetic circuit structure are arranged opposite to each other in the first direction, and the cross section area of the ventilation opening in the direction perpendicular to the first direction is smaller than the cross section area of the magnetic circuit structure in the direction perpendicular to the first direction.

Preferably, the magnetic circuit structure includes:

a yoke;

a magnet disposed on a side of the yoke facing the vibration structure;

the magnetic pole piece is laid on one side of the magnet, which faces the vibration structure.

Preferably, the yoke includes a bottom plate portion and a leg portion connected to the bottom plate portion, the magnet being provided on the bottom plate portion, the leg portion serving as the second arm.

Preferably, a plurality of the support plate portions are provided, and a plurality of the support plate portions are provided around the magnet.

Preferably, the elastic pad is annular and is fitted around the outer circumferences of the plurality of support plate portions.

Preferably, each of the support plate portions is provided with one of the elastic pads.

Preferably, the resonance frequency of the magnetic circuit structure is A, the resonance frequency of the loudspeaker is B, and the value range of A is 77% B-123% B.

Preferably, the first support arm and the second support arm are in one-to-one correspondence, and are respectively provided with a plurality of support arms.

The utility model has the beneficial effects that:

the magnetic circuit structure is erected in the shell through the elastic pad, the magnetic circuit structure is integrally suspended in the shell, when the loudspeaker produces sound, the elastic pad can reduce vibration transmitted to the shell by the magnetic circuit structure, the magnetic circuit structure has a resonant frequency relative to the loudspeaker, the acting force of the magnetic circuit structure to the shell is further reduced by adjusting the resonant frequency between the magnetic circuit structure and the magnetic circuit structure, and the elastic pad is clamped between a first support arm of the shell and a second support arm of the magnetic circuit structure in the direction perpendicular to the first direction relative to the voice coil moving along the first direction, so that the offset amplitude of the magnetic circuit structure in the direction perpendicular to the first direction is reduced, and the centering degree of the voice coil relative to the magnetic circuit structure is ensured.

Drawings

Fig. 1 is a schematic view of a one-dimensional structure of a speaker according to an embodiment of the present utility model;

fig. 2 is a schematic view of another orientation of a speaker according to an embodiment of the present utility model;

fig. 3 is a cross-sectional view of a speaker according to an embodiment of the present utility model;

fig. 4 is a schematic structural view of a speaker omitted vibration structure according to an embodiment of the present utility model;

FIG. 5 is a schematic view of the structure of the housing according to an embodiment of the present utility model;

FIG. 6 is a schematic structural diagram of a magnetic circuit structure according to an embodiment of the present utility model;

fig. 7 is a schematic view of the structure of the outer cap according to the embodiment of the present utility model.

In the figure:

1. a housing; 11. a first arm;

2. a vibrating structure;

3. a magnetic circuit structure; 31. a yoke; 311. a bottom plate portion; 312. a support plate portion; 32. a magnet; 33. a pole piece;

4. a voice coil;

5. an elastic pad;

6. an outer cover; 61. and a ventilation port.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar parts throughout, or parts having like or similar functions. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be interpreted broadly, as for example, they may be fixedly connected, or may be detachably connected, or may be electrically connected, or may be directly connected, or may be indirectly connected through an intermediary, or may be in communication with one another in two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, unless explicitly stated and limited otherwise, a first feature "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact by another feature therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

As shown in fig. 1 to 7, the present utility model provides a speaker including a housing 1, a vibrating structure 2, a magnetic circuit structure 3, a voice coil 4, and an elastic pad 5. Wherein, be provided with first support arm 11 on the shell 1, vibrating structure 2 connects in shell 1, and magnetic circuit structure 3 sets up in shell 1 to set up with shell 1 interval, be provided with the second support arm on the magnetic circuit structure 3, voice coil loudspeaker voice coil 4 connects in vibrating structure 2, can follow first direction for magnetic circuit structure 3 and remove, and elastic pad 5 presss from both sides in the direction of perpendicular to first direction and locates between first support arm 11 and the second support arm.

In the utility model, the magnetic circuit structure 3 is erected in the shell 1 through the elastic pad 5, the whole magnetic circuit structure 3 is suspended in the shell 1, when the loudspeaker produces sound, the elastic pad 5 can reduce the vibration transmitted to the shell 1 by the magnetic circuit structure 3, the magnetic circuit structure 3 has a resonance frequency relative to the loudspeaker, the acting force of the magnetic circuit structure 3 to the shell 1 is further reduced by adjusting the resonance frequency between the two parts, and the elastic pad 5 is clamped between the first support arm 11 of the shell 1 and the second support arm of the magnetic circuit structure 3 in the direction perpendicular to the first direction relative to the voice coil 4 moving along the first direction, so that the offset amplitude of the magnetic circuit structure 3 in the direction perpendicular to the first direction is reduced, and the centering of the voice coil 4 relative to the magnetic circuit structure 3 is ensured.

In this embodiment, as shown in fig. 3, the first direction is a vertical direction, the voice coil 4 can move along the vertical direction relative to the magnetic circuit structure 3, and the elastic pad 5 is sandwiched between the first support arm 11 and the second support arm in the horizontal direction, so as to limit and clamp the magnetic circuit structure 3 in the horizontal direction.

Specifically, the vibration mechanism 2 includes a middle plate and a vibration plate, the vibration plate is of an annular structure, an outer peripheral side of the vibration plate is connected to the housing 1, an inner peripheral side of the vibration plate is connected to the middle plate, and the voice coil 4 is connected to the vibration plate.

Specifically, the magnetic circuit structure 3 includes a yoke 31, a magnet 32, and a pole piece 33. The magnet 32 is disposed on a side of the yoke 31 facing the vibrating structure 2, and the pole piece 33 is disposed on a side of the magnet 32 facing the vibrating structure 2. The yoke 31, the magnet 32 and the pole piece 33 are mutually matched, so that a magnetic circuit can be generated, the voice coil 4 can receive ampere force when being electrified, and the resonance frequency of the magnetic circuit structure 3 can be correspondingly adjusted by adjusting the mass of at least any one of the yoke 31, the magnet 32 and the pole piece 33, so that different vibration reduction effects are generated.

More specifically, the yoke 31 includes a bottom plate portion 311 and a support plate portion 312 connected to the bottom plate portion 311, the magnet 32 is provided on the bottom plate portion 311, the support plate portion 312 serves as a second arm, and the voice coil 4 is looped outside the magnet 32 and the pole piece 33 and is located inside the support plate portion 312. The second support arm is formed on the yoke 31, interference to the voice coil 4 is avoided, the structure is simpler, and the preparation cost is lower.

More specifically, the support plate portions 312 are provided in plurality, the plurality of support plate portions 312 are provided around the magnet 32, and the adjacent support plate portions 312 are provided at intervals, so that the structure is simple and the processing is convenient.

In the present embodiment, the bottom plate portion 311 is arranged perpendicular to the first direction, the leg portions 312 are arranged parallel to the first direction, the bottom plate portion 311 and the leg portions 312 are perpendicular to each other, the leg portions 312 are provided with four, respectively at the edges of the bottom plate portion 311, and the adjacent leg portions 312 are perpendicular to each other, so that the plate surfaces of the four leg portions 312 can respectively abut against the elastic pads 5 on the outer sides of the voice coil 4.

Specifically, the elastic pad 5 is annular and is fitted around the outer circumferences of the plurality of support plate portions 312. The arrangement of the elastic pad 5 is simpler and more convenient. In addition to the above arrangement, the elastic pad 5 may be a single piece in a bar shape, and each support plate portion 312 is provided with one elastic pad 5, and when assembled, the corresponding elastic pad 5 is abutted against the first support arm 11.

In this embodiment, the elastic pad 5 is made of silica gel, and is a ring-shaped silica gel pad, but it may also be made of other elastic materials such as rubber.

Specifically, the first support arms 11 and the second support arms are in one-to-one correspondence, and are respectively provided with a plurality of corresponding first support arms 11 and second support arms, and respectively abut against the elastic pad 5 from two sides of the elastic pad 5.

In this embodiment, the first support arm 11 is disposed in the housing 1, and four support arms are disposed corresponding to the support plate 312, and the first support arm 11 is elongated and has an elongated abutment surface.

Specifically, the speaker still includes enclosing cover 6, be provided with on the shell 1 along the holding chamber that the first direction link up, magnetic circuit 3, voice coil loudspeaker voice coil 4 and elastic pad 5 are located the holding chamber, vibrating structure 2 connects in the one end opening part of holding chamber, enclosing cover 6 connects in the other end opening part of holding chamber, vibrating structure 2 and enclosing cover 6 closing cap holding chamber's both ends protect magnetic circuit 3, voice coil loudspeaker voice coil 4 and elastic pad 5 in the holding chamber, avoid the foreign matter to get into influence the normal work of voice coil loudspeaker voice coil 4 in the holding chamber.

More specifically, the outer cover 6 is provided with a ventilation opening 61, so that the speaker can be ventilated to balance the internal and external air pressures of the accommodating chamber when in operation.

In this embodiment, the ventilation opening 61 and the magnetic structure 3 are disposed opposite to each other in the first direction, and the cross-sectional area of the ventilation opening 61 perpendicular to the first direction is smaller than the cross-sectional area of the magnetic structure 3 perpendicular to the first direction, so that the projection of the ventilation opening 61 in the first direction is completely located on the magnetic structure 3, and on the basis of ventilation, the difficulty of entering the accommodating cavity by the foreign matters is increased.

In the loudspeaker, the rigidity of the silica gel pad and the mass of the magnetic circuit structure 3 are adjusted, so that the resonance frequency of the magnetic circuit structure 3 can be changed, and different resonance frequencies can correspondingly generate different vibration reduction effects.

The rigidity of the silica gel pad is related to the shape and the material of the silica gel, the rigidity of the silica gel pad can be reduced by increasing the width of the silica gel pad, reducing the height of the silica gel and selecting softer silica gel materials, otherwise, the rigidity of the silica gel pad can be increased, and the shape of the silica gel pad can be determined according to the structure of a loudspeaker.

Specifically, the resonance frequency of the magnetic circuit structure 3 is A, the resonance frequency of the loudspeaker is B, and the value range of A is 77% B-123% B.

In the utility model, different influences of the correlation between the resonance frequency of the magnetic circuit structure 3 and the resonance frequency of the loudspeaker on the vibration reduction effect are analyzed aiming at different resonance frequencies of the magnetic circuit structure 3.

When the resonance frequency of the loudspeaker is 520Hz and the mass of the magnetic circuit structure 3 is 3.4g, the rigidity of six groups of silica gel pads and the resonance frequency of the corresponding magnetic circuit structure 3 are set: 1. the rigidity of the silica gel pad is 12.08N/mm, and the resonance frequency of the magnetic circuit structure 3 is 300Hz; 2. the rigidity of the silica gel pad is 21.48N/mm, and the resonance frequency of the magnetic circuit structure 3 is 400Hz; 3. the rigidity of the silica gel pad is 30.92N/mm, and the resonance frequency of the magnetic circuit structure 3 is 480Hz; 4. the rigidity of the silica gel pad is 36.35N/mm, and the resonance frequency of the magnetic circuit structure 3 is 520Hz; 5. the rigidity of the silica gel pad is 48.32N/mm, and the resonance frequency of the magnetic circuit structure 3 is 600Hz; 6. the rigidity of the silica gel pad is 65.77N/mm, and the resonance frequency of the magnetic circuit structure 3 is 700Hz.

Based on the six groups of setting conditions, vibration reduction simulation experiments are carried out, and from experimental results, when the resonance frequency of the magnetic circuit structure 3 is between 400Hz and 640Hz, the vibration reduction effect is better, when the resonance frequency of the magnetic circuit structure 3 is 480Hz, the stress of the shell 1 is minimum, the vibration reduction effect is best, at the moment, the resonance frequency of the magnetic circuit structure 3 is 40Hz lower than the resonance frequency of the loudspeaker, the resonance frequency of the magnetic circuit structure 3 cannot be excessively far away from the resonance frequency of the loudspeaker, and the two frequencies differ too much, so that the stress of the shell 1 of the loudspeaker is too great and the vibration reduction effect is poor when the magnetic circuit resonates. Therefore, when the resonance frequency of the magnetic circuit structure 3 and the resonance frequency of the speaker differ by 23%, the vibration reduction effect is better.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. A loudspeaker, comprising:

the device comprises a shell (1), wherein a first support arm (11) is arranged on the shell (1);

a vibrating structure (2) connected to the housing (1);

the magnetic circuit structure (3) is arranged in the shell (1) and is arranged at intervals with the shell (1), and a second support arm is arranged on the magnetic circuit structure (3);

a voice coil (4) connected to the vibrating structure (2) and movable in a first direction with respect to the magnetic circuit structure (3);

and the elastic pad (5) is clamped between the first support arm (11) and the second support arm in the direction perpendicular to the first direction.

2. The loudspeaker according to claim 1, further comprising an outer cover (6), wherein the housing (1) is provided with a receiving cavity penetrating along the first direction, the vibrating structure (2) is connected to an opening at one end of the receiving cavity, and the outer cover (6) is connected to an opening at the other end of the receiving cavity.

3. Loudspeaker according to claim 2, characterized in that the cover (6) is provided with a ventilation opening (61).

4. A loudspeaker according to claim 3, wherein the air vent (61) and the magnetic structure (3) are arranged facing each other in the first direction, the cross-sectional area of the air vent (61) perpendicular to the first direction being smaller than the cross-sectional area of the magnetic structure (3) perpendicular to the first direction.

5. The loudspeaker according to claim 1, wherein the magnetic structure (3) comprises:

a yoke (31);

a magnet (32) provided on a side of the yoke (31) facing the vibrating structure (2);

and a pole piece (33) laid on one side of the magnet (32) facing the vibration structure (2).

6. The speaker according to claim 5, wherein the yoke (31) includes a bottom plate portion (311) and a stay portion (312) connected to the bottom plate portion (311), the magnet (32) is provided on the bottom plate portion (311), and the stay portion (312) serves as the second arm.

7. The speaker according to claim 6, wherein a plurality of the stay portions (312) are provided, and a plurality of the stay portions (312) are provided around the magnet (32).

8. The speaker of claim 7, wherein the elastic pad (5) is ring-shaped and is fitted around the outer circumferences of the plurality of support plate portions (312).

9. Loudspeaker according to claim 1, characterized in that the resonance frequency of the magnetic circuit structure (3) is a, the resonance frequency of the loudspeaker is B, and the value of a is in the range of 77% B-123% B.

10. The loudspeaker according to any one of claims 1-9, wherein the first arm (11) and the second arm are provided in a one-to-one correspondence, respectively.