CN112261559A

CN112261559A - Loudspeaker

Info

Publication number: CN112261559A
Application number: CN202011514023.6A
Authority: CN
Inventors: 丁贤; 李兆胜; 邢秀宏; 张松枝; 石伟丰
Original assignee: Changzhou Chengming Electronic Technology Co ltd
Current assignee: Changzhou Chengming Electronic Technology Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-01-22
Anticipated expiration: 2040-12-21
Also published as: CN112261559B

Abstract

The invention relates to a loudspeaker, and belongs to the technical field of loudspeakers. Including cylinder head, support and U cup, cylinder head and support are matchd the joint each other and are become whole, U cup joint is in the bottom of support, install the sound membrane in the cylinder head, the sound membrane bottom surface is equipped with a rectangle piezoceramics piece, piezoceramics piece bottom is glued there is a cell type voice coil loudspeaker voice coil that link up from top to bottom, the U cup installing port of a rectangle is still seted up to the support bottom surface, the U cup is installed to the joint on the U cup installing port, U cup top surface still is equipped with the magnetic channel for install the china department, the china department top surface is equipped with vice magnetic channel, the inside splice of vice magnetic channel is installed a vice magnetism, the china department bottom surface still splices a main magnet, and the gluing of main magnet bottom surface is in the magnetic channel of U cup. The loudspeaker solves the problem of high assembly difficulty of the loudspeaker, solves the technical problems of magnetic flux leakage and nonlinear distortion of magnetic force lines, and has the advantages of low production cost, high production efficiency, high qualified rate of finished products and excellent acoustic performance.

Description

Loudspeaker

Technical Field

The invention relates to a loudspeaker, and belongs to the technical field of loudspeakers.

Background

A speaker is a sound output device in which an electric signal output from an audio amplifier is converted into vibration of a vibration unit, generating a compressional wave in air, thereby generating a sound wave. The speakers are classified into different types of speakers, such as a magnetic speaker, an electrodynamic speaker, an electrostatic speaker, a piezoelectric speaker, and a ceramic speaker, according to the operating principle of the speakers.

In the related art, a speaker includes: a magnetic circuit unit including a magnet for generating a magnetic flux, a yoke portion for providing a path for the magnetic flux; and a bobbin (bobbin) around which the voice coil is wound; a frame (frame); and a vibrating meter (vibrometer) including a diaphragm vibrating according to movement of the bobbin, a brace (damper) for adjusting a vibration direction of the diaphragm, and a rim for fixing an outer edge of the diaphragm to the frame.

In the above speaker, when a current is applied to the voice coil, the magnetized voice coil interacts with a magnetic flux generated in the magnet and moves in the front/rear direction (i.e., between the diaphragm disposed at the front and the magnet disposed at the rear). The diaphragm vibrates, generating sound pressure. When generating sound pressure, the vibrating meter of the speaker controls vertical amplitude using two components including the edge and the stay.

However, when the vibrating meter of the speaker according to the related art generates a vertical amplitude (a large amplitude), the vibrating meter has a nonlinear characteristic, and a division vibration (division vibration) generally occurs during the vibration. Due to the split vibration and the nonlinear characteristic, distortion factors and frequency characteristic distortion increase may occur in the vibration process, and the magnetic circuit secondary magnetic assembly is not easy, the production efficiency is low, and the waterproofness is poor.

In view of the above-mentioned drawbacks, the present invention is to create a speaker, which has more industrial utility value.

Disclosure of Invention

To solve the above technical problems, an object of the present invention is to provide a speaker. The loudspeaker solves the technical problem of high loudspeaker assembly difficulty in the prior art, solves the technical problems of magnetic flux leakage and nonlinear distortion, and has the advantages of low production cost, simple assembly, easy operation, high production efficiency, high finished product qualification rate, excellent acoustic performance and wide application prospect.

The invention relates to a loudspeaker, which comprises a net cover, a bracket and a U-shaped cup,

the utility model discloses a loudspeaker box, including screen cover and support, U cup joint, sound membrane, U cup mounting hole, U cup bottom surface, the screen cover and support mutually match the joint and become whole, the U cup joint is in the bottom of support, install the sound membrane in the screen cover, the sound membrane bottom surface is equipped with a rectangle piezoceramics piece, piezoceramics piece bottom gluing has a cell type voice coil loudspeaker voice coil that link up from top to bottom, the U cup mounting hole is gone up the joint and is installed the U cup, U cup top surface still is equipped with the magnetic channel for install the china department, the china department top surface is equipped with vice magnetic channel, the inside glue of vice magnetic channel is installed a vice magnetism, the china department bottom surface still splices a main magnet, and the.

Furthermore, the sound film is of a sheet-shaped structure, and the sound film is made of polyester resin and ceramic pieces.

Furthermore, the net cover is of a square groove structure with a rectangular sound outlet at the top, and convex clamping teeth are arranged on the inner side of the bottom of the edge of the net cover and used for being clamped and fixed with the support.

Furthermore, the inside of the edge of the net cover is also provided with a step-shaped sound film mounting groove for arranging a sound film, the inside of the sound film mounting groove is a sound film vibration groove, and the sound film vibration groove is of a cavity structure and is used for providing a vibration space for the sound film.

Furthermore, the piezoelectric ceramic piece is clamped in a groove preset in the bottom surface of the sound film, and the surface of the piezoelectric ceramic piece is connected with two electric wires and is electrically connected with the outside.

Furthermore, two wires are connected to the side wall of the groove-shaped voice coil and electrically connected with the outside, and the bottom of the groove-shaped voice coil extends into the cavity of the U cup.

Furthermore, the inboard draw-in groove that is equipped with the indent of support top surface edge, the draw-in groove shape and the latch shape phase-match of wire mesh lid bottom can the joint of each other fixed, the draw-in groove inboard still is equipped with the installation cavity of indent for the installation double voice coil loudspeaker voice coil structure.

Furthermore, the side wall of the U cup mounting opening is provided with an inward U cup clamping groove for clamping the U cup.

Further, the bottom surface of the support is further provided with a plurality of heat dissipation holes for heat dissipation inside the loudspeaker, the side wall of the support is further provided with two electric wire through holes for electric wires on the piezoelectric ceramic piece and the groove-shaped voice coil to access the outside, the back surface of the support is further provided with a rectangular circuit board clamping groove, and the circuit board clamping groove is used for clamping a printed circuit board.

Furthermore, the U cup is of a rectangular groove structure, the shape of the U cup is the same as that of the U cup mounting opening in the bottom surface of the support, a circle of convex U cup clamping teeth are arranged on the outer edge of the top of the U cup, and the U cup clamping teeth are matched with the U cup clamping grooves formed in the side wall of the U cup mounting opening and used for clamping and fixing the U cup at the bottom of the support.

By the scheme, the invention at least has the following advantages:

(1) the loudspeaker adopts a double-voice-coil structure consisting of the sound film, the piezoelectric ceramic plate structure and the voice coil which are made of polyester resin materials, has the characteristics of the traditional loudspeaker and the piezoelectric buzzer, simultaneously extends the effective frequency range of the loudspeaker, improves the frequency of the piezoelectric buzzer, ensures that the sound of the piezoelectric buzzer is not sharp any more and becomes soft, and thereby effectively solves the problems of magnetic flux leakage and nonlinear distortion;

(2) the loudspeaker adopts a structure of the sound film made of the polyester resin material and the piezoelectric ceramic piece, so that the problem that the piezoelectric piece is not waterproof is solved;

(3) the loudspeaker adopts a double-magnetic-circuit structure, in order to improve the difficulty of assembly, the washer and the auxiliary magnet are assembled firstly, the magnet is directly adhered to the washer conventionally, and the upper magnet and the lower magnet repel each other, so that the magnetic force lines are opposite and are not easy to adhere.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate a certain embodiment of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic view of a self-contained construction of the loudspeaker of the present invention;

FIG. 2 is a self-contained cross-sectional view of the loudspeaker of the present invention;

FIG. 3 is an exploded view of the speaker of the present invention;

fig. 4 is a schematic perspective view of a mesh cover in the loudspeaker according to the present invention;

FIG. 5 is a schematic perspective view of the diaphragm and the piezoelectric ceramic plate of the speaker according to the present invention;

FIG. 6 is a schematic perspective view of a groove-shaped voice coil in the speaker according to the present invention;

FIG. 7 is a schematic perspective view of a washer in the loudspeaker of the present invention;

FIG. 8 is a schematic perspective view of a porcelain bowl in the loudspeaker of the present invention;

fig. 9 is a schematic front view of a support in the loudspeaker according to the invention;

fig. 10 is a schematic view of a reverse structure of a support in the loudspeaker according to the invention;

wherein, in the figure, 1, a net cover; 2. a sound membrane; 3. piezoelectric ceramic plates; 4. a groove-shaped voice coil; 5. secondary magnetism; 6. washer, 7, main magnet; 8. a U cup; 9. a support; 10. a printed circuit board;

11. a sound outlet; 12. clamping teeth; 13. a sound film mounting groove; 14. a diaphragm vibration groove;

61. a secondary magnetic slot;

81. u cup latch; 82. a magnetic slot;

91. a card slot; 92. a mounting cavity; 93. a U-cup mounting opening; 94. heat dissipation holes; 95. a wire through hole; 96. a U-cup clamping groove; 97. a circuit board slot.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Referring to fig. 1 to 3, a speaker according to a preferred embodiment of the present invention includes a mesh cover 1, a bracket 9, and a U-cup 8, and is characterized in that:

the net cover 1 and the bracket 9 are mutually matched and clamped into a whole, and the U-shaped cup 8 is clamped at the bottom of the bracket 9;

referring to fig. 4, the mesh cover 1 is a square groove structure with a rectangular sound outlet 11 at the top, the inner side of the bottom of the edge of the mesh cover 1 is provided with a convex latch 12 for being clamped and fixed with the bracket 9, the inner side of the edge of the mesh cover 1 is further provided with a step-shaped sound film mounting groove 13 for accommodating the sound film 2, the inner side of the sound film mounting groove 13 is a sound film vibration groove 14, and the sound film vibration groove 14 is a cavity structure for providing a vibration space for the sound film 2;

referring to fig. 5, the sound film 2 is of a sheet-like structure, the sound film 2 is made of polyester resin, a rectangular piezoelectric ceramic piece 3 is arranged on the bottom surface of the sound film 2, the piezoelectric ceramic piece 3 is clamped in a groove preset on the bottom surface of the sound film 2, and the surface of the piezoelectric ceramic piece 3 is connected with two wires and is electrically connected with the outside;

referring to fig. 6, a groove-shaped voice coil 4 which is through up and down is glued at the bottom of the piezoelectric ceramic piece 3, two wires are connected to the side wall of the groove-shaped voice coil 4 and electrically connected with the outside, and the bottom of the groove-shaped voice coil 4 extends into a cavity of the U-cup 8;

referring to fig. 9 and 10, an inner concave clamping groove 91 is formed in the inner side of the edge of the top surface of the support 9, the clamping groove 91 is matched with a clamping tooth at the bottom of the mesh cover 1 in shape and can be clamped and fixed with each other, an inner concave mounting cavity 92 is further formed in the inner side of the clamping groove 91 and is used for mounting a double-voice coil structure, a rectangular U-cup mounting opening 93 is further formed in the bottom surface of the support 9, an inner concave U-cup clamping groove 96 is formed in the side wall of the U-cup mounting opening 93 and is used for clamping the U-cup 8, a plurality of heat dissipation holes 94 are further formed in the bottom surface of the support 9 and are used for dissipating heat inside the speaker, two electric wire through holes 95 are further formed in the side wall of the support 9 and are used for leading electric wires on the piezoelectric ceramic plate 3 and the groove type voice coil;

referring to fig. 8, the U-cup 8 is of a rectangular groove structure, the shape of the U-cup 8 is the same as that of a U-cup mounting opening 93 on the bottom surface of the support 9, a circle of convex U-cup latch 81 is arranged on the outer edge of the top of the U-cup 8, the U-cup latch 81 is matched with a U-cup latch groove 96 arranged on the side wall of the U-cup mounting opening 93 for fastening the U-cup 8 at the bottom of the support 9, and a magnetic groove 82 is further arranged on the top surface of the U-cup 8 for mounting the washer 6;

referring to fig. 7, a rectangular concave auxiliary magnetic groove 61 is formed in the top surface of the washer 6, an auxiliary magnet 5 is arranged in the auxiliary magnetic groove 61 in a glued manner, a main magnet 7 is further glued to the bottom surface of the washer 6, and the bottom surface of the main magnet 7 is glued in a magnetic groove 82 of the U-cup 8.

The working principle of the invention is as follows:

the loudspeaker adopts the structure that the sound film 2 made of polyester resin material is matched with the piezoelectric ceramic piece 3, and then the groove-shaped voice coil 4 is combined to form a double-voice coil structure, so that the loudspeaker has the characteristics of the traditional loudspeaker and a piezoelectric buzzer, and simultaneously extends the effective frequency range of the loudspeaker, improves the frequency of the piezoelectric buzzer, ensures that the sound of the piezoelectric buzzer is not sharp and becomes soft, and in addition, the loudspeaker adopts the structure that the sound film 2 made of polyester resin material is combined with the piezoelectric ceramic piece 3, utilizes the resin material with good waterproofness to replace the traditional copper sheet, and solves the problem that the traditional piezoelectric ceramic piece 3 is not waterproof while extending the effective frequency range; finally, the loudspeaker of the invention also adopts a double magnetic circuit structure combining the main magnet 7 and the auxiliary magnet 5, the double magnet magnetic circuit is a combined magnetic circuit, namely, a magnet (called a demagnetizing magnet) which is magnetized by reverse polarity is connected inside a common internal magnetic loudspeaker washer, and the magnet is wrapped by a magnetic conduction bowl and connected with an upper magnetic conduction plate. Because two magnets with opposite polarities are adopted, the basin stand, the magnetic bowl and the washer are connected to form the same polarity, the magnetic flux forms a loop inside, and the magnetic flux cannot leak to the outside. The loudspeaker with the structure can reduce the magnetic leakage to a certain extent, so that the magnetic leakage is reduced to the minimum, the influence of the magnetic field factor on the nonlinear distortion is large when the loudspeaker unit is at a low frequency, and the influence of the magnetic field factor on the nonlinear distortion is gradually reduced after the loudspeaker unit reaches a medium-high frequency due to the fact that the unit amplitude is reduced. In the magnetic circuit design, the distribution of the magnetic field strength B along with displacement in a magnetic gap is often regarded as a cause of generating nonlinear distortion, and the distribution of the force factor Bl along with displacement is a real factor in essence. The symmetry of the BI with displacement profile affects even harmonic distortion and intermodulation distortion of the loudspeaker unit, and the flatness of the profile affects odd harmonic distortion and intermodulation distortion of the unit. Because the distribution of the force factor Bl along with the displacement is not consistent with the distribution of the magnetic field strength B along with the displacement, the design of the double magnetic circuits can ensure that the magnetic field strength B is symmetrical and evenly distributed, and the situation that the distribution curve of the force factor BI along with the displacement is not symmetrical or even possibly occurs due to the non-ideal position of the voice coil and the width of a voice coil winding is avoided, so that the nonlinear distortion can be effectively improved; in order to improve the difficulty of assembly, a process of firstly assembling the washer 6 and the secondary magnet 5 is adopted, the conventional assembly process is to directly adhere the primary magnet 7 and the secondary magnet 5 on the surface of the washer 6, and the upper magnet and the lower magnet repel each other, so that the magnetic lines of force are opposite and are not easy to adhere, the structure is to form the secondary magnetic groove 61 on the washer 6 for installing the secondary magnet 5, so that the secondary magnet is not easy to run out, the limit is increased, the technical problems of magnetic flux leakage and nonlinear distortion of the magnetic lines of force are solved, and meanwhile, the structure is low in production cost, simple and easy to assemble, high in production efficiency, high in finished product qualification rate, excellent in acoustic performance and wide in application prospect.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A loudspeaker comprises a net cover (1), a bracket (9) and a U cup (8), and is characterized in that:

the net cover (1) and the bracket (9) are mutually matched and clamped into a whole, the U-shaped cup (8) is clamped at the bottom of the bracket (9), a sound film (2) is arranged in the net cover (1), a rectangular piezoelectric ceramic piece (3) is arranged on the bottom surface of the sound film (2), a groove-shaped voice coil (4) which is communicated up and down is glued at the bottom of the piezoelectric ceramic piece (3), the bottom surface of the bracket (9) is also provided with a rectangular U-cup mounting opening (93), the U cup (8) is clamped and installed on the U cup installing opening (93), the top surface of the U cup (8) is also provided with a magnetic groove (82), is used for installing a washer (6), the top surface of the washer (6) is provided with an auxiliary magnetic slot (61), a secondary magnet (5) is arranged inside the secondary magnetic groove (61) in a glued mode, a main magnet (7) is further glued to the bottom face of the washer (6), and the bottom face of the main magnet (7) is glued into the magnetic groove (82) of the U cup (8).

2. A loudspeaker according to claim 1, wherein: the sound film (2) is of a sheet-shaped structure, and the sound film (2) is made of polyester resin.

3. A loudspeaker according to claim 1, wherein: the net cover (1) is of a square groove structure with a rectangular sound outlet (11) at the top, and convex clamping teeth (12) are arranged on the inner side of the bottom of the edge of the net cover (1) and used for being clamped and fixed with the support (9).

4. A loudspeaker according to claim 1, wherein: the net cover (1) is characterized in that a stepped sound film mounting groove (13) is further formed in the inner side of the edge of the net cover (1) and used for arranging the sound film (2), a sound film vibration groove (14) is formed in the inner side of the sound film mounting groove (13), and the sound film vibration groove (14) is of a cavity structure and used for providing a vibration space for the sound film (2).

5. A loudspeaker according to claim 1, wherein: the piezoelectric ceramic piece (3) is clamped in a groove preset in the bottom surface of the sound film (2), and the surface of the piezoelectric ceramic piece (3) is connected with two electric wires and is electrically connected with the outside.

6. A loudspeaker according to claim 1, wherein: the groove-shaped voice coil (4) is characterized in that two wires are connected to the side wall of the groove-shaped voice coil (4) and electrically connected with the outside, and the bottom of the groove-shaped voice coil (4) extends into a cavity of the U cup (8).

7. A loudspeaker according to claim 1, wherein: support (9) top surface edge inboard is equipped with draw-in groove (91) of indent, draw-in groove (91) shape and the latch shape phase-match of gauze cover (1) bottom can the joint of each other fixed, draw-in groove (91) inboard still is equipped with installation cavity (92) of indent for install two voice coil loudspeaker voice coil structures.

8. A loudspeaker according to claim 1, wherein: and an invaginated U cup clamping groove (96) is arranged on the side wall of the U cup mounting opening (93) and used for clamping the U cup (8).

9. A loudspeaker according to claim 1, wherein: support (9) bottom surface still is equipped with a plurality of louvres (94) for the inside heat dissipation of speaker, still be equipped with two electric wire through-holes (95) on support (9) lateral wall for electric wire on piezoceramics piece (3) and cell type voice coil loudspeaker voice coil (4) accesss to the external world, the back of support (9) still is equipped with circuit board draw-in groove (97) of a rectangle, circuit board draw-in groove (97) are used for joint printed circuit board (10).

10. A loudspeaker according to claim 1, wherein: u cup (8) are rectangle groove structure, the shape of U cup (8) is the same with the shape of support (9) bottom surface U cup installing port (93), U cup (8) top outer fringe is equipped with U cup latch (81) of round evagination, U cup latch (81) and U cup installing port (93) lateral wall on set up U cup draw-in groove (96) phase-match for fix the bottom at support (9) with U cup (8) joint.