CN219227820U

CN219227820U - Speaker and terminal equipment

Info

Publication number: CN219227820U
Application number: CN202320499197.2U
Authority: CN
Inventors: 郝选
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2023-03-10
Filing date: 2023-03-10
Publication date: 2023-06-20
Anticipated expiration: 2033-03-10

Abstract

The utility model provides a speaker and terminal equipment, speaker include the vibrating diaphragm and the magnetic circuit of range upon range of setting, and magnetic circuit includes at least a set of magnet array that is set up to halbach magnetic array, along the thickness direction of vibrating diaphragm, and magnetic circuit's one side is the magnetic field reinforcing side, and magnetic circuit's opposite side is the magnetic field and weakens the side, and the vibrating diaphragm sets up in magnetic field reinforcing side of magnetic circuit. The magnetic field generated by the magnet array in the magnetic field weakening device has unidirectional property, the magnetic field intensity at one side far away from the vibrating diaphragm is weaker, the magnetic field is not easy to overflow, the influence on the electronic device at the magnetic field weakening side is smaller, and the influence on the function of the electronic device in the working process is avoided; meanwhile, as the vibrating diaphragm is arranged on the magnetic field enhancement side of the magnetic circuit system, the magnetic field intensity acting on the vibrating diaphragm can be enhanced, so that the sound effect of the loudspeaker is improved, and the performance of the loudspeaker and the use experience of a user are improved.

Description

Speaker and terminal equipment

Technical Field

The disclosure relates to the field of electronic technology, and in particular, to a speaker and a terminal device.

Background

In the use process of the terminal equipment, the working state of the loudspeaker can be influenced due to the influence of factors such as the increase of radio frequency power, high battery power, electromagnetic field generated by a main board and the like of the terminal equipment, so that noise is generated in the working process of the loudspeaker, and therefore, the loudspeaker is required to be subjected to electromagnetic shielding design.

The current electromagnetic shielding design is limited in magnetism isolation, the electromagnetic shielding effect is poor, noise still can be generated in the working process of the loudspeaker, and the use experience of a user is affected.

Disclosure of Invention

In order to overcome the problems in the related art, the present disclosure provides a speaker and a terminal device.

According to a first aspect of the present disclosure, there is provided a loudspeaker comprising a diaphragm and a magnetic circuit arranged in a stack, the magnetic circuit comprising at least one set of magnet arrays arranged as halbach arrays;

along the thickness direction of the vibrating diaphragm, one side of the magnetic circuit system is a magnetic field enhancement side, the other side of the magnetic circuit system is a magnetic field weakening side, and the vibrating diaphragm is arranged on the magnetic field enhancement side of the magnetic circuit system.

Optionally, each group of the magnet arrays includes at least one array unit, and each array unit includes a first magnet, a second magnet and a third magnet which are sequentially arranged;

defining the direction of the connecting line of the N pole and the S pole of each magnet as the arrangement direction of the magnets, wherein the arrangement direction of the first magnet and the third magnet is the same, the magnetic poles of the first magnet are opposite to the magnetic poles of the third magnet in the same polarity, and the arrangement direction of the second magnet is perpendicular to the arrangement direction of the first magnet;

the arrangement direction of the second magnet is the thickness direction of the vibrating diaphragm, and the magnetic pole of one end of the second magnet, which is close to the vibrating diaphragm, is the same as the polarity of the magnetic pole, which is opposite to the first magnet and the third magnet.

Optionally, when each group of the magnet array includes multiple groups of array units, the magnet array further includes a fourth magnet, and the fourth magnet is disposed between two adjacent groups of array units;

the arrangement direction of the fourth magnet is the same as the arrangement direction of the second magnet, and the polarity of one end of the fourth magnet, which is close to the vibrating diaphragm, is opposite to the polarity of one end of the second magnet, which is close to the vibrating diaphragm.

Optionally, when the magnetic circuit system includes multiple groups of magnet arrays, the multiple groups of magnet arrays are arranged side by side.

Optionally, the speaker further includes a voice coil, and the voice coil is disposed on a side of the diaphragm facing the magnetic circuit system.

Optionally, the voice coil is disposed on the surface of the diaphragm by filling after etching or by metal printing.

Optionally, the diaphragm includes a routing channel, the routing channel penetrates through the diaphragm, and a free end of the voice coil penetrates through the routing channel.

Optionally, the speaker further includes a magnetism isolating cover, and the magnetism isolating cover is disposed on one side of the magnetic circuit system away from the diaphragm.

Optionally, the speaker further includes a circuit board, and the circuit board is disposed on a side of the magnetic isolation cover away from the diaphragm.

According to a second aspect of the present disclosure, there is provided a terminal device comprising a loudspeaker as described in the first aspect.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: the utility model provides a speaker and terminal equipment, speaker include the vibrating diaphragm and the magnetic circuit of range upon range of setting, and magnetic circuit includes at least a set of magnet array that is set up to halbach magnetic array, along the thickness direction of vibrating diaphragm, and magnetic circuit's one side is the magnetic field reinforcing side, and magnetic circuit's opposite side is the magnetic field and weakens the side, and the vibrating diaphragm sets up in magnetic field reinforcing side of magnetic circuit. The magnetic field generated by the magnet array in the magnetic field weakening device has unidirectional property, the magnetic field intensity at one side far away from the vibrating diaphragm is weaker, the magnetic field is not easy to overflow, the influence on the electronic device at the magnetic field weakening side is smaller, and the influence on the function of the electronic device in the working process is avoided; meanwhile, as the vibrating diaphragm is arranged on the magnetic field enhancement side of the magnetic circuit system, the magnetic field intensity acting on the vibrating diaphragm can be enhanced, so that the sound effect of the loudspeaker is improved, and the performance of the loudspeaker and the use experience of a user are improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

Fig. 1 is a schematic diagram of a magnetic circuit system according to an exemplary embodiment.

Fig. 2 is a schematic diagram of a magnetic circuit system according to an exemplary embodiment.

Fig. 3 is a schematic diagram of a speaker shown according to an example embodiment.

FIG. 4 is a schematic diagram of a diaphragm according to an exemplary embodiment

Fig. 5 is a schematic diagram of a speaker shown according to an example embodiment.

Fig. 6 is a schematic diagram of a speaker shown according to an example embodiment.

Fig. 7 is a schematic diagram of a speaker according to an exemplary embodiment.

Fig. 8 is a noise distribution diagram of a front speaker employing the disclosed technique.

Fig. 9 is a noise distribution diagram of a speaker employing the disclosed technique.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the utility model. Rather, they are merely examples of apparatus and methods consistent with aspects of the utility model as detailed in the accompanying claims.

In order to solve the technical problem, the present disclosure provides a speaker and a terminal device, the speaker includes a vibrating diaphragm and a magnetic circuit system that range upon range of setting, the magnetic circuit system includes at least a set of magnet array that is set up to halbach magnetic array, along the thickness direction of vibrating diaphragm, one side of magnetic circuit system is the magnetic field enhancement side, the opposite side of magnetic circuit system is the magnetic field weakens the side, the vibrating diaphragm sets up in the magnetic field enhancement side of magnetic circuit system, the magnetic field that magnet array produced has the unidirectionality, one side magnetic field intensity who keeps away from the vibrating diaphragm is weaker. The magnetic field generated by the magnet array in the magnetic field weakening device has unidirectional property, the magnetic field intensity at one side far away from the vibrating diaphragm is weaker, the magnetic field is not easy to overflow, the influence on the electronic device at the magnetic field weakening side is smaller, and the influence on the function of the electronic device in the working process is avoided; meanwhile, as the vibrating diaphragm is arranged on the magnetic field enhancement side of the magnetic circuit system, the magnetic field intensity acting on the vibrating diaphragm can be enhanced, so that the sound effect of the loudspeaker is improved, and the performance of the loudspeaker and the use experience of a user are improved.

According to an exemplary embodiment, as shown in fig. 1-3, a speaker is provided, which may be used alone, such as on various wired or bluetooth headsets, and may be provided on cell phones, visual watches, and other removable or wearable electronic devices that include a speaker.

The loudspeaker comprises a vibrating diaphragm 10 and a magnetic circuit system which are arranged in a laminated mode, the magnetic circuit system comprises at least one group of magnet arrays 23, the magnet arrays 23 comprise at least one array unit 231, the magnet arrays 23 are arranged to be halbach magnetic arrays, magnetic fields generated by the halbach magnetic arrays are unidirectional, namely, along the thickness direction of the vibrating diaphragm 10, one side of the magnetic circuit system is a magnetic field enhancement side 21, the other side of the magnetic circuit system is a magnetic field weakening side 22, the magnetic field intensity of the magnetic field weakening side 22 is smaller than that of the magnetic field enhancement side 21, the vibrating diaphragm 10 is arranged on the magnetic field enhancement side 21, the magnetic field generated by the magnetic circuit system acts on the vibrating diaphragm 10, and the magnetic field generated by a voice coil (described later) acts on the vibrating diaphragm 10 together to enable the vibrating diaphragm 10 to generate vibration and sound.

Taking the direction shown in fig. 1 as an example, the upper part of the array unit 231 is the magnetic field enhancement side 21, the lower part of the array unit 231 is the magnetic field weakening side 22, and the diaphragm 10 is arranged above the array unit 231, i.e. the diaphragm 10 is arranged on the magnetic field enhancement side, so as to enhance the magnetic field of the magnetic circuit system acting on the diaphragm 10, improve the vibration effect of the diaphragm 10, and improve the sound effect of the loudspeaker. Meanwhile, because the magnetic field intensity of the magnetic field weakening side 22 of the magnetic circuit system is weaker, other devices (such as a circuit board) arranged below the array unit 231 are less affected by the magnetic circuit system, the spillover magnetic field is reduced, the interference of electric signals generated by other devices on the vibrating diaphragm is avoided, the electromagnetic noise of the loudspeaker is reduced, and the sound effect of the loudspeaker is further improved.

In some embodiments, the magnetic circuit system may have a variety of different arrangements. In one example, the magnet array 23 of the magnetic circuit system includes a set of array units 231, as shown in fig. 1, where the array units 231 include a first magnet 2311, a second magnet 2312 and a third magnet 2313 that are sequentially arranged, and a direction in which a connection line of N poles and S poles of each magnet is defined is an arrangement direction of the magnets, so that the arrangement directions of the first magnet 2311 and the third magnet 2313 are the same (arranged along a transverse direction), magnetic poles of the first magnet 2311 and magnetic poles of the third magnet 2313 are opposite, and referring to the orientation shown in fig. 1, a right end of the first magnet 2311 is opposite to a left end of the third magnet 2313, and both are N poles. The arrangement direction of the second magnets 2312 is along the vertical direction, that is, the arrangement direction of the second magnets 2312 is the thickness direction of the diaphragm 10, and the arrangement direction of the second magnets 2312 is perpendicular to the arrangement direction of the first magnets 2311. The poles of the second magnet 2312 near the end of the diaphragm 10 are the same as the poles of the first magnet 2311 and the third magnet 2313 opposite to each other, and are all N poles. Since the N poles of the first magnet 2311 and the third magnet 2313 are closer to the second magnetic pole 2312 and the N poles of the second magnet 2312 are located at the upper side of the second magnet 2312 in the vertical direction, the N poles of the first magnet 2311, the second magnet 2312 and the third magnet 2313 are arranged relatively densely, and magnetic induction lines emitted from the three are all concentrated above the array unit 231, thereby forming the magnetic field enhancement side 21 above the array unit 231. Similarly, since the N poles of the first magnet 2311 and the third magnet 2313 are closer to the second magnetic pole 2312, and the S pole of the second magnet 2312 is located at the lower side of the second magnet 2312 in the vertical direction, the N poles of the first magnet 2311 and the third magnet 2313 may emit magnetic induction lines, the S pole of the second magnet 2312 may receive magnetic induction lines, and at this time, the magnetic induction lines emitted from the N poles of the first magnet 2311 and the third magnet 2313 may interfere with the magnetic induction lines received from the S pole of the second magnet 2312, thereby weakening the magnetic field strength located below the array unit 231, so that the magnetic field weakening side 22 is formed below the array unit 231.

In one example, the magnet array 23 of the magnetic circuit system includes a plurality of groups of array units 231, as shown in fig. 2, the magnet array 23 includes two array units 231, the two array units 231 are located in the same row, a fourth magnet 232 is disposed between the two array units 231, and the arrangement direction of the fourth magnet 232 is the same as the arrangement direction of the second magnet 2312, and all the magnets are arranged along the vertical direction. And the magnetic field direction of the fourth magnet 232 is opposite to the magnetic field direction of the second magnet 2312, that is, the polarity of the end of the fourth magnet 232 near the diaphragm 10 is opposite to the polarity of the end of the second magnet 2312 near the diaphragm 10. Referring to fig. 2, the second magnet 2312 has an N pole above and an S pole below, and the fourth magnet 232 has an S pole above and an N pole below. Referring to fig. 2, a fourth magnet 232 is disposed between two adjacent array units 231, an array unit located at the left side of the fourth magnet 232 is defined as a first array unit, an array unit located at the right side of the fourth magnet 232 is defined as a second array unit, and a third magnet 2313 in the first array unit and a first magnet 2311 in the second array unit form a new array unit for enhancing the S-pole signal strength. The plurality of array units 231 can be connected to one magnet array of the multi-array unit by the above-described combination.

In yet another example, the polarities of the magnets in the magnet array 23 of the magnetic circuit system may be changed, as shown in fig. 2 and 3, the N pole and S pole of each magnet in fig. 2 are adjusted to obtain the magnetic circuit system shown in fig. 3, so that a halbach magnetic array may still be formed, the magnetic field enhancement side 21 of the magnetic circuit system is above the magnet array 23, the magnetic field weakening side 22 of the magnetic circuit system is below the magnet array 23, and the diaphragm 10 is disposed above the magnet array 23.

It can be understood that multiple groups of magnet arrays 23 may be stacked or arranged side by side in the magnetic circuit system, multiple groups of end-to-end array units 231 may also be arranged in each group of magnet arrays 23, and a fourth magnet 232 is arranged between every two adjacent groups of array units 231.

In some embodiments, the speaker further includes a voice coil 11, where the voice coil 11 is disposed on a side of the diaphragm 10 facing the magnetic circuit system, so that when the voice coil 10 is driven by the magnetic field, the magnetic field can be formed by the current passing through the voice coil 10, and the magnetic field generated by the voice coil 10 and the magnetic field generated by the magnetic circuit system act together to drive the diaphragm 10 to vibrate and sound. As shown in fig. 4, the voice coil 11 is disposed on a surface of the diaphragm 10 facing the magnetic circuit system, the diaphragm 10 includes a routing channel 12, the routing channel 12 penetrates through the diaphragm 10, and a free end of the voice coil 11 penetrates through the routing channel 12, so as to facilitate external connection of the routing to the circuit board. Illustratively, the diaphragm 10 is made of a nonmetallic material such as plastic, PET (Polyethylene terephthalate ) polymer, PEN (Polyethylene naphthalate two formic acid glycol ester, polyethylene naphthalate) polymer, etc., the voice coil 11 is made of a metallic material with good electrical conductivity, and the voice coil 11 is disposed on the surface of the diaphragm 10 by filling metal after etching or by metal printing.

The arrangement of the voice coil 11 on the surface of the diaphragm 10 is not limited, as long as the voice coil 11 is ensured to be arranged on the surface of the diaphragm 10. In one example (not shown in this example diagram), the voice coil includes two sets of metal traces, each set of metal traces being coiled separately to form two metal coil structures, the two sets of metal traces being unconnected to each other. In another example, referring to fig. 4 and 5, each wire is bent to form a serpentine, the serpentine formed by the two sets of wires has a uniform bending direction, only the bending diameters are different, and the serpentine formed by the two sets of wires are arranged side by side.

In some embodiments, the diaphragm 10 and the magnetic circuit may be fixedly connected in different manners, as shown in fig. 5 and 6, the diaphragm 10 is disposed on the first base 31, the magnetic circuit is disposed on the second base 32, and the magnet array 23 is disposed corresponding to the voice coil 11. In one example, the first mount 31 is adhesively secured to the second mount 32. In another example, the first mount 31 and the second mount 32 are connected by screw fastening. In yet another example, one of the first base 31 and the second base 32 is provided with a clamping groove, the other of the first base 31 and the second base 32 is provided with a buckle, and the first base 31 and the second base 32 are connected in a clamping manner. In yet another example, a plurality of first connecting portions 311 are disposed on the first base 31, a plurality of second connecting portions 321 are disposed on the second base 32, the first connecting portions 311 and the second connecting portions 321 are disposed in one-to-one correspondence, one of the first connecting portions 311 and the second connecting portions 321 is of a convex structure, the other of the first connecting portions 311 and the second connecting portions 321 is of a concave structure, the first base 31 and the second base 32 are fixed by plugging, after the first connecting portions 311 and the second connecting portions 321 are connected together, a containing cavity is formed between the first base 31 and the second base 32, and the diaphragm 10 and the magnetic circuit system are disposed in the containing cavity as long as the diaphragm 10 is ensured to be disposed on the magnetic field enhancing side of the magnetic circuit system.

Here, it should be noted that, in a normal case, the larger the area of the voice coil 11 disposed on the diaphragm 10 is, the better the sound effect of the speaker is, and the arrangement mode of the voice coil is not particularly required, so long as the convenience of wiring is ensured and the convenience of winding is ensured.

In one example, the speaker further includes a magnetic shielding cover 40, as shown in fig. 7, the magnetic shielding cover 40 is disposed on a side of the magnetic circuit system away from the diaphragm 10, that is, the diaphragm 10, the magnetic circuit system and the magnetic shielding cover 40 are sequentially stacked. The magnetic shield 40 may be a magnetic shielding material with high magnetic permeability such as silicon steel, permalloy, etc. for blocking the magnetic field of the field weakening side 22, further preventing the magnetic field from overflowing, and improving the electromagnetic shielding effect. The loudspeaker also comprises a circuit board (not shown in the figure) and electronic devices such as a battery which can generate current and magnetic fields, wherein the electronic devices are arranged on one side of the magnetism isolating cover 40 far away from the vibrating diaphragm 10, and the magnetism isolating cover can shield the magnetic fields generated by the electronic devices so as to prevent electromagnetic noise generated by the electronic devices from interfering vibration of the vibrating diaphragm, so that sound effect of the loudspeaker is improved.

According to an exemplary embodiment, the present disclosure further provides a terminal device, which may be a mobile phone, a visual watch, a bluetooth headset, or other mobile or wearable electronic device comprising a speaker, the terminal device comprising a speaker as described above.

As shown in fig. 8-9, the abscissa in fig. 8 and 9 is frequency, the unit is Hz, the ordinate is noise, the unit is dB, the curve a in fig. 8 is the noise distribution curve of the speaker before the technical scheme of the present disclosure is adopted, and the curve b in fig. 9 is the noise distribution curve of the speaker after the technical scheme of the present disclosure is adopted. Comparing the a curve with the B curve, it can be seen that, in the region a in fig. 8, the a curve protrudes with a few abnormal line segments to represent that noise exists in the loudspeaker, and after the technical scheme of the present disclosure is adopted, i.e. the region B in fig. 9, the trend of the B curve is smoother, no abnormal line segment exists, which indicates that the noise is effectively eliminated after the technical scheme of the present disclosure is adopted, the noise peak value is reduced by about 10dB, which can prove that the technical scheme of the present disclosure has an obvious attenuation effect on the electromagnetic noise of the loudspeaker, and the electromagnetic shielding effect is good.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the utility model being indicated by the following claims.

It is to be understood that the utility model is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

Claims

1. A loudspeaker comprising a diaphragm and a magnetic circuit arranged in a stack, the magnetic circuit comprising at least one set of magnet arrays arranged as halbach arrays;

2. The loudspeaker of claim 1, wherein each set of the magnet arrays comprises at least one array unit, each of the array units comprising a first magnet, a second magnet, and a third magnet arranged in sequence;

3. The loudspeaker of claim 2, wherein when each set of the magnet array includes a plurality of sets of array units, the magnet array further includes a fourth magnet disposed between two adjacent sets of the array units;

4. A loudspeaker according to any one of claims 1 to 3, wherein when the magnetic circuit comprises a plurality of sets of the magnet arrays, the plurality of sets of magnet arrays are arranged side by side.

5. A loudspeaker according to any one of claims 1 to 3, further comprising a voice coil disposed on a side of the diaphragm facing the magnetic circuit.

6. The loudspeaker of claim 5, wherein the voice coil is disposed on the surface of the diaphragm by post-etch filling or metal printing.

7. The loudspeaker of claim 5, wherein the diaphragm includes a trace channel extending through the diaphragm, the free end of the voice coil extending through the trace channel.

8. The loudspeaker of claim 1, further comprising a magnetic shield disposed on a side of the magnetic circuit remote from the diaphragm.

9. The loudspeaker of claim 8, further comprising a circuit board disposed on a side of the magnetic shield remote from the diaphragm.

10. A terminal device, characterized in that the terminal device comprises a loudspeaker according to any of claims 1 to 9.