Magnetic loop device of loudspeaker

Abstract

The utility model provides a magnetic loop device of a loudspeaker, which relates to loudspeakers and comprises a first yoke, a second yoke and a third yoke. The magnet penetrates through the first yoke, a gap is reserved between the inner side wall of the magnet and the outer side wall of the first yoke, and the gap forms a first magnetic gas channel; one end face of the washer is connected with a magnetic circuit isolating ring sheet and is also connected with the magnet; the washer and the magnetic circuit isolating ring sheet penetrate through the first yoke, a gap is reserved between the inner side wall of the magnetic circuit isolating ring sheet and the outer side wall of the first yoke, and the gap forms a second magnetic gas channel; a gap is reserved between the inner side wall of the washer and the outer side wall of the first yoke and forms a third magnetic gas channel, and the third magnetic gas channel is used for placing a voice coil; and the first magnetic gas channel, the second magnetic gas channel and the third magnetic gas channel are communicated in sequence. And a magnetic circuit isolation ring sheet is arranged at the second magnetic channel where the magnetic fields intersect, so that the coil magnetic field and the magnet magnetic field can be ensured to be uniformly intersected in the second magnetic channel, and the distortion index of the loudspeaker is reduced.

Description

Technical Field

[0001] The utility model relates to a loudspeaker, in particular to a loudspeaker magnetic loop device. Background Art

[0002] The use of loudspeakers to play sound sources has been widely used in various fields. When the loudspeaker plays the sound source, the sound source current enters the magnetic circuit, the magnet in the magnetic field circuit generates a magnetic field, and the sound source current flows through the coil, causing the coil to also generate a magnetic field. The magnetic field of the coil and the magnetic field of the magnet produce a certain regular attraction and repulsion movement at the junction;

[0003] Due to the uneven dispersion of the magnetic field of the magnet, the pole positions of the coil magnetic field and the magnetic field of the magnet are asymmetric, resulting in uneven magnetic field distribution at the junction, which causes speaker distortion. Utility Model Content

[0004] The utility model aims to provide a loudspeaker magnetic loop device, and the technical problem to be solved is to reduce the distortion index of the loudspeaker, so as to improve the sound source playback quality of the loudspeaker.

[0005] The utility model is realized by the following technical solutions:

[0006] A loudspeaker magnetic loop device, comprising:

[0007] First yoke;

[0008] A magnet, wherein the magnet passes through a first yoke, and a gap is left between an inner wall of the magnet and an outer wall of the first yoke, and the gap forms a first magnetic channel;

[0009] A washer, one end face of the washer being connected to a magnetic circuit isolation ring, and an end face of the washer connected to the magnetic circuit isolation ring being connected to a magnet;

[0010] The washer and the magnetic circuit isolation ring are both penetrated by the first yoke, and a gap is left between the inner wall of the magnetic circuit isolation ring and the outer wall of the first yoke, and the gap forms a second magnetic channel; a gap is left between the inner wall of the washer and the outer wall of the first yoke, and the gap forms a third magnetic channel, and the third magnetic channel is used to place the voice coil;

[0011] The first magnetic channel, the second magnetic channel and the third magnetic channel are connected in sequence.

[0012] A voice coil is placed in the above-mentioned third magnetic channel. When the sound source current passes through the coil, a coil magnetic field is generated. The magnet in the first magnetic channel generates a magnet magnetic field. The coil magnetic field and the magnet magnetic field intersect in the second magnetic channel. A magnetic circuit isolation ring is arranged at the second magnetic channel where the magnetic fields intersect, so that the magnet magnetic field entering the second magnetic channel from the first magnetic channel is evenly distributed and the magnet magnetic field entering the second magnetic channel from the third magnetic channel is evenly distributed, thereby ensuring that the coil magnetic field and the magnet magnetic field can evenly intersect in the second magnetic channel, reducing the distortion index of the speaker and improving the sound source playback quality of the speaker.

[0013] Furthermore, the area of ​​the longitudinal section of the first magnetic channel is greater than the area of ​​the longitudinal section of the second magnetic channel.

[0014] Since the longitudinal cross-sectional area of ​​the first magnetic channel is large, the magnetic field of the magnet is more evenly distributed, so that the magnetic flux changes more smoothly in the first magnetic channel, and the magnetic flux distribution is optimized, which helps to improve the driving force of the speaker and reduce distortion; the larger longitudinal cross-sectional area makes the sound source signal more smoothly transmitted in the first magnetic channel, improves the transmission efficiency of the sound source signal, and reduces the loss and distortion of the signal; since the longitudinal cross-sectional area of ​​the first magnetic channel is large, the magnetic circuit is more stable, and the magnetic field of the magnet and the magnetic field after the intersection are not easily disturbed or weakened, which helps to improve the sound quality and playback effect of the speaker;

[0015] To sum up, the longitudinal cross-sectional area of ​​the first magnetic channel is larger than that of the second magnetic channel, which helps to optimize the magnetic flux distribution, improve the transmission efficiency of the sound source signal, and enhance the stability of the magnetic circuit, thereby further reducing the distortion index of the speaker and improving the sound quality and playback quality.

[0016] Furthermore, the area of ​​the longitudinal section of the third magnetic channel is greater than the area of ​​the longitudinal section of the second magnetic channel.

[0017] Since the longitudinal cross-sectional area of ​​the third magnetic channel is larger, the coil magnetic field is more evenly distributed in the third magnetic channel, which optimizes the magnetic flux distribution of the third magnetic channel and makes the magnetic flux change more smoothly in the channel, which helps to further reduce the distortion of the speaker; the longitudinal cross-sectional area of ​​the third magnetic channel is increased, which makes the sound source signal transmitted more smoothly in the channel, improves the transmission efficiency of the sound source signal, and reduces the signal loss and distortion; the longitudinal cross-sectional area of ​​the third magnetic channel is increased, which makes the magnetic field of the entire magnetic circuit more stable and the magnetic field is not easily disturbed or weakened; it helps to improve the sound quality and playback effect of the speaker.

[0018] The longitudinal cross-sectional area of ​​the second magnetic channel at the intersection of the magnetic fields is smaller, which concentrates the evenly distributed magnetic field into the second magnetic channel, reduces the problem of uneven magnetic field distribution caused by magnetic pole asymmetry, further reduces the distortion index of the speaker, and improves the sound source playback quality of the speaker.

[0019] To sum up, the longitudinal cross-sectional area of ​​the third magnetic channel is larger than that of the second magnetic channel, which helps to further optimize the magnetic flux distribution, improve the transmission efficiency of the sound source signal, and enhance the stability of the magnetic circuit, thereby further reducing the distortion index of the speaker and improving the sound quality and playback quality.

[0020] Furthermore, the outer side wall of the first yoke is recessed toward the middle.

[0021] The concave design of the outer wall of the first yoke makes the magnetic flux more concentrated, thereby improving the driving force and output volume of the speaker; the concave design makes the magnetic field more evenly distributed between the inner side of the first yoke and the magnet, further reducing the distortion of the speaker.

[0022] In summary, the design of the outer wall of the first yoke being concave toward the middle helps to further reduce the distortion index of the speaker and improve the sound quality and playback quality by increasing the magnetic flux concentration and optimizing the magnetic field distribution.

[0023] Furthermore, it also includes a second yoke, wherein the second yoke is fixedly sleeved on one end of the first yoke;

[0024] An end surface of the magnet away from the washer is connected and in contact with the second yoke.

[0025] By adding the above-mentioned second yoke, the magnetic circuit of the entire magnetic circuit is more complete and the magnetic field distribution is more uniform, which helps to improve the driving force of the speaker and reduce distortion; the second yoke is fixedly connected to the first yoke, which increases the stability of the entire magnetic circuit structure and improves the sound quality and playback effect of the speaker; the magnet is connected to the second yoke, and the sound source signal can be transmitted more evenly in the entire magnetic circuit, reducing the distortion caused by uneven transmission path.

[0026] In summary, the design of adding a second yoke and fixing it to the first yoke, and connecting the magnet to the second yoke helps to further reduce the distortion index of the speaker and improve the sound quality and playback quality by enhancing the integrity of the magnetic circuit, improving the structural stability and optimizing the transmission of the sound source signal.

[0027] Furthermore, the magnet is bonded to the second yoke;

[0028] A first groove is provided on an end surface of the second yoke that contacts the magnet, and an inner side wall of the magnet corresponds to the first groove.

[0029] In order to reduce the influence of the connecting device on the magnetic flux, the magnet and the second yoke are connected by bonding; to ensure the tightness of the connection, excessive adhesive is usually used for bonding, so there is a problem of adhesive overflow; to prevent the overflowed adhesive from flowing into the first magnetic channel and affecting the magnetic field distribution, a first groove is provided on the second yoke to allow the overflowed adhesive to flow into the first groove.

[0030] Furthermore, one end surface of the washer connected to the magnetic circuit isolation ring sheet is provided with a step, the step is formed by the middle part of the washer being recessed inwardly, the washer is annular, the middle part of the washer here refers to the edge part close to the inner wall of the washer, and the magnetic circuit isolation ring sheet is bonded to the step;

[0031] A second groove is arranged on the step, and the inner side wall of the magnet and the outer side wall of the magnetic circuit isolation ring sheet correspond to the second groove.

[0032] By bonding the magnetic circuit isolation ring sheet to the step of the washer, the structure of the entire loudspeaker magnetic circuit device is more compact, which is beneficial to reducing the volume and weight of the loudspeaker;

[0033] In order to reduce the influence of the connection device on the magnetic flux, the magnetic circuit isolation ring piece and the ladder are connected by bonding, and the above-mentioned magnet and the washer are also connected by bonding;

[0034] To ensure the tightness of the connection, excessive adhesive is usually used for bonding, so there is a problem of adhesive overflow; to prevent the overflowed adhesive from flowing into the first magnetic channel and affecting the magnetic field distribution, a second groove is provided on the step to allow the overflowed adhesive to flow into the second groove.

[0035] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0036] A voice coil is placed in the above-mentioned third magnetic channel. When the sound source current passes through the coil, a coil magnetic field is generated. The magnet in the first magnetic channel generates a magnet magnetic field. The coil magnetic field and the magnet magnetic field intersect in the second magnetic channel. A magnetic circuit isolation ring is arranged at the second magnetic channel where the magnetic fields intersect, so that the magnet magnetic field entering the second magnetic channel from the first magnetic channel is evenly distributed and the magnet magnetic field entering the second magnetic channel from the third magnetic channel is evenly distributed, thereby ensuring that the coil magnetic field and the magnet magnetic field can evenly intersect in the second magnetic channel, reducing the distortion index of the speaker and improving the sound source playback quality of the speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0038] Figure 1 It is a schematic diagram of the external structure of the magnetic circuit device;

[0039] Figure 2 for Figure 1 Sectional view of AA in the middle;

[0040] Figure 3 for Figure 2 A magnified view of middle;

[0041] Figure 4 for Figure 2 A front view of

[0042] Figure 5 This is a cross-sectional view of the washer.

[0043] Marks and corresponding parts names in the attached drawings:

[0044] 11. first yoke; 12. second yoke; 20. magnet; 30. washer; 31. step; 40. magnetic circuit isolation ring; 41. first magnetic channel; 42. second magnetic channel; 43. third magnetic channel; 51. first groove; 52. second groove. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation methods of the utility model and their descriptions are only used to explain the utility model and are not intended to limit the utility model.

[0046] Example 1

[0047] Combination Figure 1 , Figure 2 and Figure 4 , this embodiment 1 provides a loudspeaker magnetic loop device, including:

[0048] A first yoke 11;

[0049] The magnet 20 is passed through the first yoke 11, and a gap is left between the inner wall of the magnet 20 and the outer wall of the first yoke 11, and the gap forms a first magnetic channel 41;

[0050] A washer 30, wherein the lower end surface of the washer 30 is connected to the upper end surface of the magnetic circuit isolation ring piece 40, and the end surface of the washer 30 connected to the magnetic circuit isolation ring piece 40 is connected to the magnet 20;

[0051] The washer 30 and the magnetic circuit isolation ring piece 40 are both penetrated by the first yoke 11, and a gap is left between the inner wall of the magnetic circuit isolation ring piece 40 and the outer wall of the first yoke 11, and the gap forms a second magnetic channel 42, and a gap is left between the outer wall of the magnetic circuit isolation ring piece 40 and the outer wall of the corresponding washer 30; a gap is left between the inner wall of the washer 30 and the outer wall of the first yoke 11, and the gap forms a third magnetic channel 43, and the third magnetic channel 43 is used to place the voice coil;

[0052] The first magnetic channel 41 , the second magnetic channel 42 and the third magnetic channel 43 are connected in sequence.

[0053] A voice coil is placed in the above-mentioned third magnetic channel 43. When the sound source current passes through the coil, a coil magnetic field is generated. The magnet 20 in the first magnetic channel 41 generates a magnet 20 magnetic field. The coil magnetic field and the magnet 20 magnetic field intersect in the second magnetic channel 42. A magnetic circuit isolation ring plate 40 is arranged in the second magnetic channel 42 where the magnetic fields intersect, so that the magnetic field of the magnet 20 entering the second magnetic channel 42 from the first magnetic channel 41 is evenly distributed, and the magnetic field of the magnet 20 entering the second magnetic channel 42 from the third magnetic channel 43 is evenly distributed, thereby ensuring that the coil magnetic field and the magnet 20 magnetic field can evenly intersect in the second magnetic channel 42, thereby reducing the distortion index of the speaker and improving the sound source playback quality of the speaker.

[0054] In a specific embodiment, the area of ​​the longitudinal section of the first magnetic channel 41 is greater than the area of ​​the longitudinal section of the second magnetic channel 42 .

[0055] Since the longitudinal cross-sectional area of ​​the first magnetic channel 41 is large, the magnetic field distribution of the magnet 20 is more uniform, so that the magnetic flux changes more smoothly in the first magnetic channel 41, and the magnetic flux distribution is optimized, which helps to improve the driving force of the speaker and reduce distortion; the larger longitudinal cross-sectional area makes the sound source signal more smoothly transmitted in the first magnetic channel 41, improves the transmission efficiency of the sound source signal, and reduces the loss and distortion of the signal; since the longitudinal cross-sectional area of ​​the first magnetic channel 41 is large, the magnetic circuit is more stable, and the magnetic field of the magnet 20 and the magnetic field after the intersection are not easily disturbed or weakened, which helps to improve the sound quality and playback effect of the speaker;

[0056] To sum up, the longitudinal cross-sectional area of ​​the first magnetic channel 41 being larger than the longitudinal cross-sectional area of ​​the second magnetic channel 42 helps to optimize the magnetic flux distribution, improve the transmission efficiency of the sound source signal, and enhance the stability of the magnetic circuit, thereby further reducing the distortion index of the speaker and improving the sound quality and playback quality.

[0057] Example 2

[0058] Combination Figure 2 and Figure 3 Based on Example 1, the area of ​​the longitudinal section of the third magnetic channel 43 is greater than the area of ​​the longitudinal section of the second magnetic channel 42; the area of ​​the longitudinal section of the first magnetic channel 41 is greater than the area of ​​the longitudinal section of the third magnetic channel 43.

[0059] Since the longitudinal cross-sectional area of ​​the third magnetic channel 43 is larger, the coil magnetic field is more evenly distributed in the third magnetic channel 43, and the magnetic flux distribution of the third magnetic channel 43 is optimized, so that the magnetic flux changes more smoothly in the channel, which helps to further reduce the distortion of the speaker; the longitudinal cross-sectional area of ​​the third magnetic channel 43 is increased, so that the sound source signal is transmitted more smoothly in the channel, the transmission efficiency of the sound source signal is improved, and the signal loss and distortion are reduced; the longitudinal cross-sectional area of ​​the third magnetic channel 43 is increased, so that the magnetic field of the entire magnetic circuit is more stable, and the magnetic field is not easily disturbed or weakened; it helps to improve the sound quality and playback effect of the speaker.

[0060] The longitudinal cross-sectional area of ​​the second magnetic channel 42 at the intersection of the magnetic fields is small, which gathers the evenly distributed magnetic field into the second magnetic channel 42, reduces the problem of uneven magnetic field distribution caused by magnetic pole asymmetry, further reduces the distortion index of the speaker, and improves the sound source playback quality of the speaker.

[0061] To sum up, the longitudinal cross-sectional area of ​​the third magnetic channel 43 being larger than the longitudinal cross-sectional area of ​​the second magnetic channel 42 helps to further optimize the magnetic flux distribution, improve the transmission efficiency of the sound source signal, and enhance the stability of the magnetic circuit, thereby further reducing the distortion index of the speaker and improving the sound quality and playback quality.

[0062] Example 3

[0063] Combination Figure 2 and Figure 4 Based on any of the above embodiments, the outer wall of the first yoke 11 is recessed toward the middle, and the recess is arc-shaped.

[0064] The concave design of the outer wall of the first yoke 11 makes the magnetic flux more concentrated, thereby improving the driving force and output volume of the speaker; the concave design makes the magnetic field more evenly distributed between the inner side of the first yoke 11 and the magnet, further reducing the distortion of the speaker.

[0065] In summary, the design of the outer wall of the first yoke 11 being concave toward the middle helps to further reduce the distortion index of the speaker and improve the sound quality and playback quality by increasing the magnetic flux concentration and optimizing the magnetic field distribution.

[0066] Example 4

[0067] Combination Figure 2 and Figure 4 , based on any of the above embodiments, further comprising a second yoke 12, wherein the second yoke 12 is fixedly sleeved on one end of the first yoke 11, and the first yoke 11 and the second yoke 12 are integrally formed by a mold to form a T-shaped truncated cone structure;

[0068] One end surface of the magnet 20 away from the washer 30 contacts the second yoke 12 .

[0069] By adding the above-mentioned second yoke 12, the magnetic circuit of the entire magnetic circuit is more complete and the magnetic field distribution is more uniform, which helps to improve the driving force of the speaker and reduce distortion; the second yoke 12 is fixedly connected to the first yoke 11, which increases the stability of the entire magnetic circuit structure and improves the sound quality and playback effect of the speaker; the magnet 20 is connected to the second yoke 12, and the sound source signal can be transmitted more evenly in the entire magnetic circuit, reducing the distortion caused by uneven transmission path.

[0070] In summary, the design of adding the second yoke 12 and fixing it to the first yoke 11, and connecting the magnet 20 to the second yoke 12 helps to further reduce the distortion index of the speaker and improve the sound quality and playback quality by enhancing the integrity of the magnetic circuit, improving the structural stability and optimizing the transmission of the sound source signal.

[0071] Example 5

[0072] Combination Figures 2 to 4 , on the basis of Example 4, the magnet 20 is bonded to the second yoke 12;

[0073] A first groove 51 is disposed on one end surface of the second yoke 12 that contacts the magnet 20 , and an inner side wall of the magnet 20 corresponds to the first groove 51 .

[0074] In order to reduce the influence of the connecting device on the magnetic flux, the magnet 20 and the second yoke 12 are connected by bonding; to ensure the tightness of the connection, excessive adhesive is usually used for bonding, so there is a problem of adhesive overflow; to prevent the overflowed adhesive from flowing into the first magnetic channel 41 and affecting the magnetic field distribution, a first groove 51 is provided on the second yoke 12, so that the overflowed adhesive flows into the first groove 51.

[0075] Example 6

[0076] Combination Figure 5 On the basis of Example 5, a step 31 is provided on one end face of the washer 30 connected to the magnetic circuit isolation ring sheet 40. The step 31 is formed by an inward depression in the middle of the washer 30. The washer 30 is annular. The middle of the washer 30 here refers to the edge portion close to the inner wall of the washer 30. The step 31 is provided on one end face close to the magnet 20.

[0077] The magnetic circuit isolation ring sheet 40 is bonded to the step 31, and the magnet 20 is also connected to the washer 30 by bonding, and the magnet 20 is bonded to the end surface portion except the step 31;

[0078] A second groove 52 is provided on the step 31 , and the inner wall of the magnet 20 and the outer wall of the magnetic circuit isolation ring 40 correspond to the second groove 52 .

[0079] By bonding the magnetic circuit isolation ring sheet 40 to the step 31 of the washer 30, the structure of the entire loudspeaker magnetic circuit device is more compact, which is beneficial to reducing the volume and weight of the loudspeaker;

[0080] In order to reduce the influence of the connection device on the magnetic flux, the magnetic circuit isolation ring piece 40 and the ladder 31 are connected by bonding, and the magnet 20 and the washer 30 are also connected by bonding;

[0081] To ensure the tightness of the connection, excessive adhesive is usually used for bonding, so there is a problem of adhesive overflow; to prevent the overflowed adhesive from flowing into the first magnetic channel 41 and affecting the magnetic field distribution, a second groove 52 is provided on the step 31 to allow the overflowed adhesive to flow into the second groove 52.

[0082] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A loudspeaker magnetic circuit device, characterized in that: include: A first yoke (11); A magnet (20), wherein the magnet (20) passes through the first yoke (11), and a gap is left between the inner wall of the magnet (20) and the outer wall of the first yoke (11), and the gap forms a first magnetic channel (41); A washer (30), one end face of the washer (30) being connected to a magnetic circuit isolation ring piece (40), and the end face of the washer (30) connected to the magnetic circuit isolation ring piece (40) being connected to the magnet (20); The washer (30) and the magnetic circuit isolation ring piece (40) are both penetrated by the first yoke (11), and a gap is left between the inner wall of the magnetic circuit isolation ring piece (40) and the outer wall of the first yoke (11), and the gap forms a second magnetic channel (42); a gap is left between the inner wall of the washer (30) and the outer wall of the first yoke (11), and the gap forms a third magnetic channel (43), and the third magnetic channel (43) is used to place the voice coil; The first magnetic channel (41), the second magnetic channel (42) and the third magnetic channel (43) are connected in sequence.

2. A loudspeaker magnetic circuit device according to claim 1, characterized in that: The area of ​​the longitudinal section of the first magnetic channel (41) is greater than the area of ​​the longitudinal section of the second magnetic channel (42).

3. A loudspeaker magnetic circuit device according to claim 2, characterized in that: The area of ​​the longitudinal section of the third magnetic channel (43) is greater than the area of ​​the longitudinal section of the second magnetic channel (42).

4. A loudspeaker magnetic circuit device according to any one of claims 1 to 3, characterized in that: The outer side wall of the first yoke (11) is recessed toward the middle.

5. A loudspeaker magnetic circuit device according to claim 1, characterized in that: It also includes a second yoke (12), wherein the second yoke (12) is fixedly sleeved on one end of the first yoke (11); An end surface of the magnet (20) away from the washer (30) contacts the second yoke (12).

6. A loudspeaker magnetic circuit device according to claim 5, characterized in that: The magnet (20) is bonded to the second yoke (12); A first groove (51) is provided on an end surface of the second yoke (12) that contacts the magnet (20), and an inner side wall of the magnet (20) corresponds to the first groove (51).

7. A loudspeaker magnetic circuit device according to claim 6, characterized in that: An end surface of the washer (30) connected to the magnetic circuit isolation ring piece (40) is provided with a step (31), the step (31) being formed by an inward depression in the middle of the washer (30), and the magnetic circuit isolation ring piece (40) is bonded to the step (31); A second groove (52) is provided on the step (31), and the inner side wall of the magnet (20) and the outer side wall of the magnetic circuit isolation ring sheet (40) correspond to the second groove (52).

Images