CN106358128A - Midrange Compression Driver - Google Patents

Abstract

A middle-tone compression type driving device comprises a high-tone cylinder body, a magnetic circuit system, a vibrating diaphragm assembly, a compression type equalizer, a diffusion type equalizer and a lining cover, wherein a plurality of radiating rib columns are arranged in the high-tone cylinder body; the magnetic circuit system is accommodated in the high-pitched cylinder body and is in contact with the radiating rib; the vibration diaphragm assembly is arranged at an opening at the upper end of the high-pitch cylinder body, the vibration diaphragm assembly is composed of a vibration diaphragm, a voice coil and a plurality of retaining sheets, the upper end of the voice coil is fixed on the vibration diaphragm, the lower end of the voice coil penetrates through the magnetic circuit system, the compression type equalizer is arranged above the vibration diaphragm assembly and connected with the vibration diaphragm assembly, the diffusion type equalizer is arranged on the lower surface of the lining cover, and the diffusion type equalizer sequentially penetrates through the compression type equalizer, the vibration diaphragm assembly and the magnetic circuit system and extends into the bottom of the high-; the voice coil comprises a voice coil framework and voice coil wires wound on the inner side and the outer side of the voice coil framework, and high-temperature-resistant insulating paint is coated on the surfaces of the voice coil wires. The invention has good heat dispersion, can reduce segmentation vibration, improves language fidelity under a large sound pressure level state, has strong practicability and is suitable for popularization and application.

Description

Midrange Compression Driver

technical field

The invention relates to the technical field of audio equipment, in particular to a mid-range compression driving device.

Background technique

With the continuous development of scientific research technology, higher requirements are put forward for the performance of speakers, which require high sound quality, speech clarity, high reliability and other characteristics. The above-mentioned characteristics of the speaker are related to heat dissipation performance, diaphragm and voice coil. However, the existing voice coil and magnetic circuit system are installed together. After long-term use, the voice coil will heat up and the temperature of the magnetic circuit system will increase. The voice coil and magnetic circuit system are sealed in the tweeter body, so they cannot dissipate heat quickly. , which will affect the sound quality.

In addition, the existing diaphragm generally adopts a dome-shaped diaphragm, and the dome-shaped diaphragm must have high physical rigidity. The physical rigidity is obtained by selecting a high elastic modulus material, and by increasing the diaphragm thickness is achieved. However, the above method also correspondingly increases the weight of the diaphragm, requiring higher power to drive the diaphragm, thereby reducing the efficiency of the speaker. If the weight of the diaphragm is to be reduced, the thickness of the diaphragm needs to be reduced, or a lighter material should be used, and a thinner diaphragm or a lighter material will easily generate split vibration, resulting in distortion.

Contents of the invention

Therefore, the object of the present invention is to provide a mid-range compression drive device to solve the problems of poor heat dissipation performance of the current drive device, easy generation of split vibration and distortion.

To achieve the above object, the present invention mainly adopts the following technical solutions:

A mid-range compression driving device, including a treble cylinder, a magnetic circuit system, a diaphragm assembly, a compression equalizer, a diffusion equalizer and a lining cover arranged in sequence from bottom to top, the upper surface of the treble cylinder An annular groove is provided, and a number of heat dissipation ribs are distributed on the outer wall of the annular groove; the magnetic circuit system includes a magnetic cup, a magnet accommodated in the magnetic cup, and a magnet set on the magnet and accommodated in the magnetic cup. A washer, a magnetic gap is formed between the magnet, the washer and the magnetic cup, the magnetic cup is accommodated in the annular groove, and is located between the heat dissipation rib column and the inner wall of the annular groove, and the heat dissipation rib column is opposite to the magnetic The cup is pushed against the top to limit the position; the diaphragm assembly is arranged at the opening of the upper end of the treble cylinder body. The diaphragm assembly includes a diaphragm, a voice coil and a number of retaining pieces. The retaining pieces are arranged on the upper and lower sides of the diaphragm. The upper end of the voice coil is fixed to the diaphragm, and the lower end is installed in the magnetic gap. The compression-type equalizer is arranged above the diaphragm assembly and connected to it, and the diffusion-type equalizer is arranged on the lower surface of the lining cover. The diffusion equalizer passes through the compression equalizer, the diaphragm assembly, the magnetic circuit system and extends into the bottom of the treble cylinder; Coil wire, the surface of the voice coil wire is coated with a high temperature resistant insulating varnish with a blackness value of 0.85-1.

Further, the diaphragm is arranged in a ring shape, and the cross-section of one side of the diaphragm is arranged in a V shape, the voice coil is fixed at the V-shaped apex position of the diaphragm, and the diaphragm forms a vibration area on both sides of the voice coil .

Further, the material of the tweeter cylinder is die-casting aluminum material, and a cavity is provided in the middle of the tweeter cylinder, which runs through the tweeter cylinder up and down, and the cavity forms a horn.

Further, a sound-absorbing material for reducing standing waves is provided inside the cavity of the tweeter cylinder, and the sound-absorbing material is sound-absorbing cotton.

Further, the magnetic cup, the magnet and the washer are all in a ring structure, the diameters of the magnet and the washer are equal and smaller than the diameter of the magnetic cup, and the distance between the washer, the magnet and the magnetic cup is A magnetic gap is formed between them.

Further, the side surfaces of several heat dissipation ribs close to the magnetic cup form a shape structure matching the outer surface of the magnetic cup, and the inner ring of the annular groove matches the shape of the inner ring of the magnetic cup.

Further, a circular hole is provided in the middle of the compression-type equalizer, and a plurality of air chamber channels are arranged around the circular hole, and the air chamber channels include sound wave inlets facing the diaphragm, and the sound wave inlets are helically distributed, each The distance between the entrance of the sound wave and the center of the circular hole is not equal.

Further, the compression-type equalizer is composed of a first body and a second body, the sound wave inlet is arranged on the first body, and the air chamber channel also includes a sound wave outlet, and the sound wave outlet faces the Diffusion equalizer settings described above.

Further, an extension part is provided at the sound wave outlet of each air chamber channel, and the extension part extends toward the direction of the diffusion-type equalizer; set up.

Further, the material of the magnet is N38H type NdFeB strong magnet.

To sum up, in the compression drive device of the present invention, the voice coil penetrates into the magnetic gap, and the magnetic system is installed between the heat dissipation ribs and the inner wall of the annular convex groove, which further improves the heat dissipation capacity of the voice coil, thereby It avoids the damage or failure of the speaker caused by the heating of the voice coil, and at the same time, it can reduce the temperature of the magnet after work, which is conducive to the flow of air to dissipate heat. In addition, the V-shaped diaphragm is designed so that the inner and outer regions of the voice coil are provided with vibration regions, thereby reducing split vibrations, improving speech fidelity at high sound pressure levels, and avoiding the problem of speech distortion.

Description of drawings

Fig. 1 is a structural schematic diagram of the mid-range compression driving device of the present invention.

FIG. 2 is an exploded schematic view of the mid-range compression drive device shown in FIG. 1 .

FIG. 3 is a schematic cross-sectional view of the mid-range compression driving device shown in FIG. 1 .

detailed description

In order to make the technical solution of the present invention more clearly expressed, the present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figures 1 to 3, a mid-range compression drive device provided by the present invention includes a tweeter cylinder 10, a magnetic circuit system 20, a diaphragm assembly, and a compression equalizer arranged in sequence from bottom to top. 60. Diffusion type equalizer 70 and lining cover 80. The magnetic circuit system 20 is installed in the treble cylinder body 10, and the diaphragm assembly is arranged at the opening of the upper end of the treble cylinder body 10. The diaphragm assembly includes a plurality of retaining pieces 30, a diaphragm 40 and a voice coil 50. The holding piece 30 is installed on the upper and lower sides of the diaphragm 40, the upper end of the voice coil 50 is fixed on the diaphragm 40, and the lower end is penetrated in the magnetic circuit system 20, and the compression equalizer 60 is arranged on the holding piece 30 Above and connected to it, the diffusion equalizer 70 is arranged on the lower surface of the lining cover 80, and the diffusion equalizer 80 passes through the compression equalizer 60, the diaphragm assembly, the magnetic circuit system 20 and extends Enter into tweeter cylinder body 10 bottoms.

The tweeter cylinder 10 is made of metal material, specifically, the tweeter cylinder 10 is made of die-cast aluminum. It can be understood that in other embodiments, the tweeter cylinder 10 can also be made of other suitable materials. The upper surface of the tweeter cylinder 10 is provided with an annular groove 11, and the middle part of the tweeter cylinder 10 is provided with a hollow cavity 12, and the cavity 12 runs through the tweeter cylinder 10 up and down and forms a horn. The cavity 12 is additionally provided with a sound-absorbing material for reducing standing waves. In this embodiment, the sound-absorbing material is sound-absorbing cotton. The arrangement of the sound-absorbing material in this embodiment enables a good acoustic environment to be built inside the driving device, preventing standing waves from interfering with the propagation of original sound.

A plurality of cooling ribs 13 are evenly distributed on the outer side wall of the annular groove 11 of the tweeter cylinder 10 , and the magnetic circuit system 20 is installed between the cooling ribs 13 and the inner side wall of the annular groove 11 . The magnetic circuit system 20 includes a magnetic cup 21, a magnet 22 accommodated in the magnetic cup 21, and a washer 23 arranged on the magnet 22 and accommodated in the magnetic cup 20, the magnetic cup 21, the magnet 22, Washer 23 is a ring structure. The diameters of the magnet 22 and the washer 23 are equal and smaller than the diameter of the magnetic cup 21 , and a magnetic gap is formed between the washer 23 , the magnet 22 and the magnetic cup 21 . In this embodiment, the magnet 22 is a strong magnet made of NdFeB, and its preferred model is N38H, and the N38H magnet has a stable strong magnetic field. Understandably, in other embodiments, the magnet 22 may also be other types of strong magnets.

The voice coil 50 includes a voice coil skeleton and a voice coil wire, and the surface of the voice coil wire is coated with high blackness and high temperature resistant insulating varnish to improve the ability of the voice coil wire to radiate heat energy. In this embodiment, the blackness value of the high-blackness and high-temperature-resistant insulating varnish is 0.85-1. The voice coil wire is wound on the inner and outer sides of the voice coil frame to form an inner and outer coil structure, so that both the inner and outer surfaces of the voice coil 50 can effectively radiate heat energy to the magnetic circuit system 20, thereby having excellent heat dissipation performance. The bottom of the voice coil 50 is installed in the magnetic gap, and the heat generated by the voice coil 50 can be quickly transferred to the magnetic cup 21 through the heat radiation of the inner and outer coils. The outer surface of the magnetic cup 21 and the heat dissipation ribs 13 are in contact with each other, so that the heat on the magnetic cup 21 can be quickly transferred to the heat dissipation rib column 13, and then diffused from the tweeter cylinder body 10. Therefore, even the heat generated by a high-power, SPL driver can be quickly dissipated. The inner surfaces of several heat dissipation ribs 13 form a shape structure that matches the magnetic cup 21. The heat dissipation ribs 13 limit the position of the magnetic circuit system 20 to a certain extent, so that the magnetic circuit system 20 can be firmly embedded in the magnetic cup 21. The treble cylinder body 10 can buffer shocks and drops in any direction, and has good performance of vibration resistance and impact resistance.

In this embodiment, the diaphragm 40 is arranged in a ring shape, and the cross section of one side of the diaphragm 40 is arranged in a V shape. The material of the vibrating membrane is PEEK material, which has excellent flexural modulus, so that the vibrating membrane 40 has the best vibration modulus, thereby ensuring the high sensitivity of the driving device to a certain extent. During installation, the voice coil 50 is connected to the V-shaped apex of the diaphragm, except for the diaphragm area delineated by the voice coil 50, part of the diaphragm is located outside the voice coil 50, so that both sides of the voice coil 50 vibrate area, so that the entire diaphragm forms a ring shape, so that, under the same mass, the area of the effective vibration radiation sound wave close to the voice coil 50 is greatly increased, so that the diaphragm 40 can be driven with less power and the same The amount of sound waves, especially in the high frequency band, the resonant frequency has been increased, while the split vibration is reduced. Due to the reduced mass, the front and rear edges of the transient response curve tend to be steeper, which improves the speech fidelity under the state of large pressure level degree, so as to avoid the problem of language distortion.

The compression-type equalizer 60 includes an equalizer body, a circular hole is arranged in the middle of the equalizer body, and a plurality of air chamber channels are formed around the circular hole, and the air chamber channels include a channel facing the diaphragm 40 The sound wave inlet 63 of the air chamber channel is distributed in a helical line, and the distance between the sound wave inlet 63 of each air chamber channel and the center of the body. The equalizer body is composed of two ring-shaped first main body 61 and second main body 62, wherein the first main body 61 is provided with a plurality of sound wave inlets 63, a plurality of bottom surfaces 64, and sound waves in a spiral shape. The entrance 63 corresponds to multiple sets of first side walls 65 , and a channel is formed between the two first side walls 65 and the bottom surface 64 . The second main body 62 is provided with a top surface and a plurality of sets of second side surfaces 66 corresponding to the first side surfaces 65 on the first main body 61, that is, after the combination, the first side surfaces 65 and the second side surfaces 66 constitute each The side surface of the gas chamber passage, the sound wave outlet is formed by the bottom surface 64 of the first body 61 , the first side surface 66 and the top surface of the second body 62 .

The compression equalizer 60 is matched with the diaphragm 40 in operation, and when vibrating and sounding, the air chamber sound wave channel of the sound wave inlet 63 on the compression equalizer 60 is helically distributed to form a geometric band-pass filter tube. That is, when sound waves pass through each channel, some frequency bands are enhanced and some frequency bands are attenuated. An extension part 67 is provided at the sound wave outlet of each gas channel, and the extension part 67 is pointed, forming the structure of a diffusion equalizer; making the sound field uniform, thereby obtaining a good frequency response curve and high sensitivity.

To sum up, in the compression drive device of the present invention, the voice coil 50 penetrates into the magnetic gap, and the magnetic system 20 is installed between the heat dissipation rib column 13 and the inner wall of the annular convex groove 11, which further improves the voice coil 50. Excellent heat dissipation capability, thereby avoiding the damage or failure of the speaker caused by the heating of the voice coil 50, and at the same time reducing the temperature of the magnet after work, which is conducive to the flow of air to dissipate heat. In addition, the V-shaped diaphragm 40 is designed so that the inner and outer regions of the voice coil 50 are provided with vibration regions, thereby reducing split vibrations, improving speech fidelity at high sound pressure levels, and avoiding speech distortion. question.

The above-mentioned embodiment only expresses one implementation mode of the present invention, and its description is relatively specific and detailed, but it should not be understood as limiting the patent scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. a kind of middle pitch compression driving means it is characterised in that: include set gradually from the bottom to top high pitch cylinder body, magnetic circuit system System, vibrating diaphragm assembly, compression-type eqalizing cricuit, diffused eqalizing cricuit and lining lid, described high pitch cylinder body upper surface is provided with annular groove, ring Some radiating ribs posts are distributed with the lateral wall of connected in star；Described magnetic circuit system include magnetic cup, the Magnet being placed in magnetic cup, with And be arranged on Magnet and be placed in the washer in magnetic cup, form a magnetic gap between Magnet, washer and magnetic cup, described magnetic cup holds It is placed in annular groove, and is located between radiating ribs post and annular groove medial wall, described radiating ribs post carries out supporting limit to magnetic cup Position；Described vibrating diaphragm assembly is arranged at the opening of high pitch cylinder body upper end, and vibrating diaphragm assembly includes vibrating diaphragm, voice coil loudspeaker voice coil and some retention tabs, Described retention tab is arranged at the upper and lower both sides of vibrating diaphragm, and described voice coil loudspeaker voice coil upper end is fixed on vibrating diaphragm, and lower end is arranged in magnetic gap, described Compression-type eqalizing cricuit and is attached thereto above vibrating diaphragm assembly, and described diffused eqalizing cricuit is arranged on lining lid lower surface, should Diffused eqalizing cricuit sequentially passes through compression-type eqalizing cricuit, vibrating diaphragm assembly, magnetic circuit system and extend into high pitch cylinder base；Described sound Circle includes speech coil framework and is around in voice coil line inside and outside speech coil framework, and the surface of described voice coil line scribbles blackness value for 0.85 ～1 high-temperature insulating paint.

2. middle pitch compression driving means as claimed in claim 1 it is characterised in that: described vibrating diaphragm is ringwise arranged, vibrating diaphragm Unilateral cross section be in that v shape is arranged, described voice coil loudspeaker voice coil is fixed on the v shape vertex position of vibrating diaphragm, vibrating diaphragm equal shape inside and outside voice coil loudspeaker voice coil Become to have vibration area.

3. middle pitch compression driving means as claimed in claim 2 it is characterised in that: the material of described high pitch cylinder body be die casting Aluminum, the middle part of high pitch cylinder body is provided with about one cavity running through high pitch cylinder body, and described cavity forms a bugle.

4. middle pitch compression driving means as claimed in claim 3 it is characterised in that: the inside cavity of described high pitch cylinder body sets There is the sound-absorbing material for cutting down standing wave, described sound-absorbing material is acoustical cotton.

5. middle pitch compression driving means as claimed in claim 1 it is characterised in that: described magnetic cup, Magnet, washer are ring The diameter of shape structure, described Magnet, the equal diameters of washer, and respectively less than magnetic cup, forms between described washer, Magnet and magnetic cup Magnetic gap.

6. middle pitch compression driving means as claimed in claim 5 it is characterised in that: some described radiating ribs posts press close to magnetic The side of cup encloses a shape and structure matching with described magnetic cup outer surface, and the internal ring of described annular groove is interior with magnetic cup Ring-shaped matches.

7. middle pitch compression driving means as claimed in claim 1 it is characterised in that: be provided with the middle part of described compression-type eqalizing cricuit One circular hole, is provided with multiple air chamber passages around described circular hole, and air chamber passage includes the acoustic wave inlet towards vibrating diaphragm, and described sound wave enters Mouth helically line distribution, the distance of each acoustic wave inlet and center of circular hole.

8. middle pitch compression driving means as claimed in claim 7 it is characterised in that: described compression-type eqalizing cricuit is main by first Body and the second body combination form, and in the first main body, described air chamber passage also includes an acoustic wave outlet to described acoustic wave inlet, Described acoustic wave outlet is arranged towards described diffused eqalizing cricuit.

9. middle pitch compression driving means as claimed in claim 8 it is characterised in that: the sound wave of each described air chamber passage goes out It is equipped with extension, described extension extends towards described diffused eqalizing cricuit direction at mouthful；And described extension is in from the outside to the core The pointed setting tapering into.

10. middle pitch compression driving means as claimed in claim 1 it is characterised in that: the material of described Magnet be n38h type Number neodymium iron boron strong magnet.