CN210327973U

CN210327973U - Magnetic circuit system

Info

Publication number: CN210327973U
Application number: CN201921401149.5U
Authority: CN
Inventors: 不公告发明人
Original assignee: Huizhou Ultrasonic Audio Co Ltd
Current assignee: Huizhou Ultrasonic Audio Co Ltd
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2020-04-14
Anticipated expiration: 2029-08-27

Abstract

The application provides a magnetic circuit system, which comprises a voice coil, a washer, a magnet and a T iron, wherein the T iron comprises a horizontal part and a vertical part, the magnet and the washer are stacked on the horizontal part, and the voice coil is sleeved in the vertical part and is positioned on the inner sides of the magnet and the washer; magnetic gaps are formed among the voice coil, the washer, the magnet and the T iron, and the voice coil is characterized by further comprising a gasket, wherein the gasket is arranged between the horizontal part and the magnet; the gasket is provided with a through hole which is communicated with the magnetic gap, so that an airflow channel of the magnetic circuit can be effectively increased, the ventilation capacity of the magnetic circuit is increased, the heat in the magnetic gap can be dissipated by airflow, the effect of quick self-cooling of the magnetic circuit is achieved, and the problem of overhigh temperature of the magnetic gap in the loudspeaker is effectively solved.

Description

Magnetic circuit system

Technical Field

The utility model belongs to the technical field of the radiating technique of speaker and specifically relates to a magnetic circuit is related to.

Background

As an electroacoustic transducer, the acoustic output efficiency of a loudspeaker is typically less than 2% because 90% of the input power is converted to joule heating of the loudspeaker voice coil. This heat causes the temperature of the voice coil to rise sharply, heating the entire magnetic circuit of the speaker.

In the existing T-iron type loudspeaker magnetic circuit system, a magnet and a washer are stacked above the T-iron, and meanwhile, a voice coil is sleeved in the T-iron and positioned on the inner side of the magnet and the washer. When the loudspeaker works, the vibration system vibrates to compress air, air flow enters the magnetic gap from the gap between the voice coil and the T iron and is taken out from the gap between the voice coil and the magnet and the washer, and therefore heat dissipation is achieved. However, the gaps between the voice coil and the magnet and between the voice coil and the washer are too small to facilitate the air flow, so that the heat conversion speed is slow, the heat dissipation capability is poor, and the bearing power and the service life of the loudspeaker are limited.

Therefore, it is necessary to optimally design the magnetic circuit system of the existing speaker so that the magnetic circuit system has good air flow exchange and heat dissipation functions, so as to reduce the overall temperature of the speaker and ensure normal operation.

Disclosure of Invention

In order to solve the above problem that prior art exists, the utility model provides a magnetic circuit through set up a gasket between T iron and magnet, and set up the through-hole that has the ventilation effect on the gasket, and it can pass through the air current with the heat in magnetic gap and derive, reaches the quick refrigerated effect of magnetic circuit, effectively solves the too high problem of speaker inside magnetic gap temperature.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a magnetic circuit system comprises a voice coil, a washer, a magnet and a T iron, wherein the T iron comprises a horizontal part and a vertical part, the magnet and the washer are stacked on the horizontal part, and the voice coil is sleeved in the vertical part and positioned on the inner sides of the magnet and the washer; magnetic gaps are formed among the voice coil, the washer, the magnet and the T iron, and the voice coil is characterized by further comprising a gasket, wherein the gasket is arranged between the horizontal part and the magnet; the gasket is provided with a through hole which is communicated with the magnetic gap.

In this magnetic circuit, set up the gasket between the horizontal part of T iron and the magnet, seted up the through-hole on the gasket, and the through-hole communicates with each other with the magnetic gap, and the air current passageway of magnetic circuit increases, and the ventilative volume of magnetic circuit increases, can distribute away the heat in magnetic gap through the air current, reaches the effect of the quick self-cooling of magnetic circuit.

As a further description of the technical solution of the present invention, in the T-bar, an annular groove is formed at a joint of the horizontal portion and the vertical portion.

As a further description of the technical solution of the present invention, one end of the through hole communicates with the annular groove, and the other end protrudes from the horizontal portion and communicates with the outside.

The joint of the horizontal part and the vertical part of the T-shaped iron is provided with the annular groove, so that heat above and below the magnetic gap can be radiated out through the through hole of the gasket, and the other end of the through hole protrudes out of the horizontal part and is communicated with the outside air to radiate the heat through air flow conduction.

As a further description of the technical solution of the present invention, the through hole is opened along the radial direction of the gasket.

As a further description of the technical solution of the present invention, the through holes are uniformly distributed on the gasket.

The through holes are radially formed in the gasket and are uniformly distributed, so that heat dissipation channels can be effectively increased, and the heat dissipation efficiency of the magnetic circuit system is improved.

As a further description of the technical solution of the present invention, the inner diameter of the gasket is smaller than or equal to the inner diameter of the washer.

Under the prerequisite of guaranteeing speaker stroke and magnetic permeability, set up the gasket between T iron and magnet, its internal diameter is less than or equal to the internal diameter of china department, can avoid the voice coil loudspeaker voice coil to touch the gasket when downstream and lead to the speaker to wipe the bad phenomenon of circle or bottoming.

As a further description of the technical solution of the present invention, the outer diameter of the gasket is larger than the outer diameter of the horizontal portion, so that the through hole can be protruded from the horizontal portion by the outer end and communicate with the outside air, and the magnetic circuit system is configured to perform heat exchange between the through hole and the outside air.

As a further description of the technical solution of the present invention, the shape of the through hole is a bar shape, an oval shape, a rectangular shape, or an irregular figure.

According to the design needs of heat dissipation demand and appearance, the through-hole can set up to bar, ellipse, rectangle or irregular figure, and its mode of arrangement also can set up according to the demand.

Based on foretell technical scheme, the utility model discloses the technological effect who gains does:

the utility model provides a magnetic circuit, the gasket setting of seting up the through-hole is between T iron and magnet, and the through-hole communicates with each other with the magnetic gap, effectively increases magnetic circuit's airflow channel, and increase magnetic circuit air permeability can distribute away the heat in magnetic gap through the air current, reaches the effect of the quick self-cooling of magnetic circuit, effectively solves the problem that the inside magnetic gap high temperature of speaker leads to the demagnetization, can satisfy high-power speaker's magnetic circuit application demand.

Drawings

Fig. 1 is an exploded view of the magnetic circuit system of the present invention.

Fig. 2 is a cross-sectional view of the magnetic circuit system of the present invention.

Fig. 3 is a partial cross-sectional view of the T-iron and gasket connection structure of the present invention.

Fig. 4 is a bottom view of the magnetic circuit system of the present invention.

Fig. 5 is a schematic structural diagram of the gasket of the present invention.

Fig. 6 is a schematic view of an airflow passage of the magnetic circuit system of the present invention.

Detailed Description

To facilitate an understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings and specific examples. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Example 1

Fig. 1 and fig. 2 show an exploded view and a cross-sectional view of the magnetic circuit system of the present embodiment, respectively, fig. 3 shows a partial cross-sectional view of the T-iron and spacer connection structure of the present embodiment, and referring to fig. 1 to fig. 3, a magnetic circuit system includes a voice coil 1, a washer 2, a magnet 3, a T-iron 4, and a spacer 5. The magnetic circuit system of this embodiment is the magnetic circuit system of external magnet formula speaker, and voice coil 1, china 2 and magnet 3 all overlap on T iron 4 promptly. Specifically, the T-bar 4 includes a horizontal portion 41 and a vertical portion 42, and the horizontal portion 41 and the vertical portion 42 are of an integral structure.

Round holes are formed in the middle of the magnet 3 and the washer 2, and the magnet and the washer pass through the vertical part 42 of the T iron 4 and are sequentially stacked above the horizontal part 41. As a heat source of the speaker, the voice coil 1 is sleeved in the vertical portion 42, that is, the voice coil 1 is located outside the vertical portion 42 and outside the washer 2 and the magnet 3. Further, a gap is formed between the voice coil 1 and the vertical portion 42, and a gap is also formed between the voice coil 1 and the washer 2 and the magnet 3.

As shown in fig. 2, a magnetic gap 10 is formed between the voice coil 1 and the washer 2, the magnet 3, and the T-iron 4.

In the magnetic circuit system of the present embodiment, a spacer 5 is provided between the horizontal portion 41 of the T-bar 4 and the magnet 3, and serves to add an airflow path to the magnetic circuit system. The gasket 5 is also a ring structure, which has a through hole 51 and a central hole 52 in the middle. The central hole 52 is arranged on the horizontal part 41 after penetrating through the vertical part 42 of the T iron 4; and the through hole 51 is in communication with the magnetic gap 10. Specifically, the heat generated by the voice coil is driven by the airflow, the heat of the magnetic gap 10 is increased, and then is dissipated to the outside through the through hole 51 of the gasket 5, so that the airflow channel is additionally arranged inside the magnetic circuit system, and the heat dissipation is relatively increased. The airflow path for heat dissipation will be further described below.

Fig. 4 shows a bottom view of the magnetic circuit system of this embodiment, and with reference to fig. 1 and fig. 2, on the basis of fig. 4, in the T-bar 4, an annular groove 43 is further formed at a joint of the horizontal portion 41 and the vertical portion 42, that is, the annular groove is located inside the horizontal portion 41 and surrounds the vertical portion 42, so that an end 51A of the through hole 51 near the inside is communicated with the annular groove 43, and an end 51B of the through hole 51 near the outside is communicated with the outside, that is, the through hole 51 functions as an air flow channel, which is more beneficial to the heat above and below the magnetic gap 10 to be dissipated through the through hole 51 of the gasket. As shown in fig. 4, the outer diameter of the gasket 5 is larger than the outer diameter of the horizontal portion 41, and one end 51B of the through hole near the outer side protrudes from the horizontal portion 41 to communicate with the outside air, so that heat is dissipated by air flow conduction.

It should be further noted that, in the spacer 5 disposed between the T-iron 4 and the magnet 3 of the present embodiment, the inner diameter of the spacer is smaller than or equal to the inner diameter of the washer 2, that is, the radius of the central hole 52 of the spacer 5 is not larger than the radius of the circular hole of the washer 2, so that on the premise of ensuring the stroke and the magnetic permeability of the speaker, the bad phenomenon that the voice coil 1 touches the spacer when moving downward to wipe the speaker or bottom the speaker can be avoided.

Fig. 5 shows a schematic structural diagram of the gasket of the present embodiment, and as shown in fig. 5, the through holes 51 are opened along the radial direction of the gasket 5 and are uniformly distributed on the gasket 5. Specifically, 4 through holes 51 are uniformly distributed along the diameter of the gasket 5 in a radial shape, one end 51A close to the inner side is arranged in the magnetic gap 10 and communicated with the annular groove 43, and one end 51B close to the outer side is communicated with the outside; moreover, the relative through holes are positioned on the same diameter, and the adjacent through holes are mutually vertical, so that the heat dissipation channel is increased, and the heat dissipation efficiency of the magnetic circuit system can be improved.

The through hole 51 of the present embodiment is in a strip shape, and the gasket having the strip-shaped through hole is easy to process and mass-produce, and has low cost. Of course, the through holes can be arranged in an oval, rectangular or irregular pattern according to the heat dissipation requirement and the design requirement of the appearance, and the arrangement mode can also be arranged according to the requirement.

Example 2

Fig. 6 shows a schematic diagram of an airflow channel of the magnetic circuit system of this embodiment, as can be seen from fig. 6, in the working process of the speaker, the vibration system drives the voice coil 1 to reciprocate up and down and compress air to form airflow, and the voice coil generates heat, and meanwhile, in the gap between the voice coil 1 and the vertical portion 42 of the T-iron, the airflow enters the magnetic circuit system from the position a, and then is divided into two airflow channels to exchange with the outside, specifically:

(1) enters the magnetic gap 10 and then is radiated from a gap B between the voice coil 1 and the washer 2 and the magnet 3;

(2) into the magnetic gap 10, then from above and below the annular groove 43, then into the through hole 51 from the end 51A on the inner side of the through hole 51, passes through the air flow passage, and finally is emitted from the end 51B on the outer side of the through hole 51.

That is, (2) is an air flow path peculiar to this magnetic circuit system, and this air flow path is formed by the voice coil, the washer, the magnet, the T-iron, and the spacer, and the air flow direction is in order that the gap a between the voice coil and the vertical portion → the magnetic gap 10 → the end 51A on the inner side of the through hole → the through hole 51 → the end 51B on the outer side of the through hole, and then is emitted to the outside.

To sum up, the magnetic circuit that this embodiment provided has set up the gasket that has ventilation effect between T iron and magnet, has seted up the through-hole on the gasket, and the through-hole communicates with each other with the magnetic gap, and magnetic circuit's air flow channel can increase like this, and the increase of magnetic circuit ventilation capacity can distribute away the heat in magnetic gap through the air current, reaches the effect of the quick self-cooling of magnetic circuit, effectively solves the problem that the inside magnetic gap temperature of speaker leads to the demagnetization.

The foregoing is merely illustrative and explanatory of the structure of the present invention, which is described in more detail and with greater particularity, and is not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, many variations and modifications are possible without departing from the inventive concept, and such obvious alternatives fall within the scope of the invention.

Claims

1. A magnetic circuit system comprises a voice coil, a washer, a magnet and a T iron, wherein the T iron comprises a horizontal part and a vertical part, the magnet and the washer are stacked on the horizontal part, and the voice coil is sleeved in the vertical part and positioned on the inner sides of the magnet and the washer; magnetic gaps are formed among the voice coil, the washer, the magnet and the T iron, and the voice coil is characterized by further comprising a gasket, wherein the gasket is arranged between the horizontal part and the magnet; the gasket is provided with a through hole which is communicated with the magnetic gap.

2. The magnetic circuit system according to claim 1, wherein an annular groove is opened at a junction of the horizontal portion and the vertical portion in the T-iron.

3. The magnetic circuit system according to claim 2, wherein one end of the through hole communicates with the annular groove, and the other end protrudes from the horizontal portion and communicates with the outside.

4. A magnetic circuit system according to claim 3, wherein the through-holes are open in a radial direction of the spacer.

5. A magnetic circuit system according to claim 4, characterized in that the through holes are evenly distributed over the spacer.

6. The magnetic circuit system of claim 1, wherein the inner diameter of the spacer is less than or equal to the inner diameter of washer.

7. The magnetic circuit system according to claim 1, wherein the outer diameter of the spacer is larger than the outer diameter of the horizontal portion.

8. A magnetic circuit system according to any of claims 1-7, wherein the through-holes have a shape of a strip, an ellipse, a rectangle or an irregular pattern.