Coil loudspeaker
By designing multiple vibration modules and magnetic isolation plates in the micro coil speakers, and using magnetic field to drive the diaphragm vibration, the problem of the sound quality of the micro speakers deteriorates when the size is larger, achieving more uniform vibration and better sound quality.
Patent Information
- Application Number
- CN202421465941.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-06-24
AI Technical Summary
When the overall size of the micro coil speaker is large, the vibration effect of the diaphragm is affected, resulting in a decrease in sound quality.
A coil horn is designed, including a diaphragm and a plurality of vibration modules, and a magnetic partition is provided between two adjacent vibration modules. Each vibration module includes a coil and a magnetic assembly, which is fixedly connected to the diaphragm and drives the diaphragm to vibrate through a magnetic field.
The diaphragm movement is driven simultaneously by the coils of multiple vibration modules, which improves the overall vibration uniformity of the diaphragm, thereby improving the sound quality of the coil speaker.
Smart Images
Figure CN222691867U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of sound-generating devices, and in particular to a coil speaker. Background Art
[0002] For a miniature coil speaker installed in an electronic device (eg, a smart phone, a tablet computer, a learning machine, etc.), when the overall size of the miniature coil speaker is too long or too large, the vibration effect of its diaphragm will be affected.
[0003] Specifically, for larger miniature speakers in the related art, since the center of the diaphragm cannot be supported by the coil, the vibration amplitude will be reduced due to the influence of the diaphragm material's (e.g., thermoplastic elastomer material) own gravity, which will lead to a decrease in the sound quality of the miniature speaker. Utility Model Content
[0004] In order to overcome the problems existing in the related art, the present disclosure provides a coil speaker.
[0005] According to a first aspect of an embodiment of the present disclosure, there is provided a coil speaker, comprising: a diaphragm and a plurality of vibration modules, wherein the plurality of vibration modules are arranged on the same side of the diaphragm, and a magnetic isolation plate is arranged between two adjacent vibration modules;
[0006] Each of the plurality of vibration modules comprises a coil and a magnetic component, wherein the magnetic component comprises a first magnetic component and a second magnetic component arranged around the first magnetic component; the coil is wound around the outside of the first magnetic component and has a gap between the coil and the first magnetic component;
[0007] The coil of each vibration module in the plurality of vibration modules is fixedly connected to the vibration membrane.
[0008] In some embodiments, for each vibration module among the plurality of vibration modules, a magnetic field is formed between the first magnetic member and the second magnetic member, and the magnetic field directions of the magnetic fields in each vibration module are the same.
[0009] In some embodiments, for each vibration module in the plurality of vibration modules, the coil and magnetic flux lines of the magnetic field are perpendicular to each other, and the diaphragm and magnetic flux lines of the magnetic field are parallel to each other.
[0010] In some embodiments, for each vibration module among the plurality of vibration modules, the coil is wound in the same direction on the first magnetic member.
[0011] In some embodiments, among the plurality of vibration modules, input ends of the coils of each vibration module are connected to each other, and output ends of the coils of each vibration module are connected to each other.
[0012] In some embodiments, for each vibration module of the plurality of vibration modules, a magnetic pole of a side of the first magnetic member close to the second magnetic member is opposite to a magnetic pole of a side of the second magnetic member close to the first magnetic member.
[0013] In some embodiments, for each of the plurality of vibration modules, there are a plurality of second magnetic members, and the magnetic poles of the plurality of second magnetic members on a side close to the first magnetic member are the same.
[0014] In some embodiments, the diaphragm is fixedly connected to the front cover of the coil speaker, and the magnetic isolation plate and the first magnetic component and the second magnetic component in each vibration module of the multiple vibration modules are fixedly connected to the magnetic bowl of the coil speaker.
[0015] In some embodiments, the diaphragm is rectangular in shape, and has a length of 20 mm to 60 mm and a width of 20 mm to 60 mm.
[0016] In some embodiments, for each vibration module of the multiple vibration modules, there are multiple second magnetic members, and the multiple second magnetic members surround a rectangular outer contour of the vibration module, so that the multiple vibration modules can completely cover the rectangular diaphragm.
[0017] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:
[0018] The coil speaker provided by the embodiment of the present disclosure includes a diaphragm and a plurality of vibration modules, wherein the plurality of vibration modules are arranged on the same side of the diaphragm, and a magnetic isolation plate is arranged between two adjacent vibration modules. Each of the plurality of vibration modules includes a coil and a magnetic component, wherein the magnetic component includes a first magnetic part and a second magnetic part arranged around the first magnetic part; the coil is wound around the outside of the first magnetic part, and there is a gap between the coil and the first magnetic part; the coil of each vibration module in the plurality of vibration modules is fixedly connected to the diaphragm. The embodiment of the present disclosure can simultaneously drive the diaphragm to move through the coils in the plurality of vibration modules, thereby improving the uniformity of the overall vibration of the diaphragm, and further improving the sound quality of the coil speaker. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 A schematic structural diagram of a coil speaker in an embodiment of the present disclosure is shown.
[0020] Figure 2 Another structural schematic diagram of a coil horn in an embodiment of the present disclosure is shown.
[0021] Reference numerals:
[0022] 100 - diaphragm; 200 - vibration module; 210 - coil; 221 - first magnetic component; 222 - second magnetic component; 300 - magnetic isolation plate; 400 - front cover; 500 - magnetic bowl; 600 - dome. DETAILED DESCRIPTION
[0023] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.
[0024] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.
[0025] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.
[0026] Figure 1 A schematic diagram of the structure of a coil speaker in an embodiment of the present disclosure is shown. Figure 1 As shown, the coil speaker includes: a diaphragm 100 and a plurality of vibration modules 200 , and the plurality of vibration modules 200 are arranged on the same side of the diaphragm 100 .
[0027] Each vibration module 200 includes a coil 210 and a magnetic component. The coil 210 of each vibration module 200 is fixedly connected to the diaphragm 100. After the coil 210 is energized, it can drive the diaphragm 100 to move under the drive of the magnetic component, thereby making the coil speaker emit sound.
[0028] Since the solution provided in the embodiment of the present disclosure has multiple vibration modules 200, each vibration module 200 has an independent magnetic component and coil 210. Therefore, the coils 210 in the multiple vibration modules 200 can support and push the diaphragm 100 from different positions, thereby improving the uniformity of the overall vibration of the diaphragm 100, and further improving the sound quality of the miniature speaker.
[0029] It should be noted that the magnetic assembly in each vibration module 200 may include a first magnetic member 221 and a second magnetic member 222 disposed around the first magnetic member 221. The coil 210 is wound around the outside of the first magnetic member 221 with a gap between the coil 210 and the first magnetic member 221.
[0030] The first magnetic member 221 and the second magnetic member 222 may be magnets, magnetic steel or other magnetic materials.
[0031] Among the multiple vibration modules 200 arranged on the same side of the diaphragm 100 , a magnetic isolation plate 300 is provided between two adjacent vibration modules 200 to prevent the magnetic components of different vibration modules 200 from influencing each other and destroying the magnetic field provided by the magnetic components.
[0032] In some embodiments, in each vibration module 200 , a magnetic field may be formed between the first magnetic member 221 and the second magnetic member 222 , and the magnetic field directions of the magnetic fields in each vibration module 200 are the same.
[0033] In some embodiments, in each vibration module 200, the coil 210 and the magnetic flux lines of the magnetic field (refer to Figure 1 The dotted arrows in the middle are perpendicular to each other, and the diaphragm 100 and the magnetic flux lines of the magnetic field are parallel to each other. Therefore, after the coil 210 is energized in the magnetic field, the Lorentz force generated by the Lorentz law can push the diaphragm 100 to move.
[0034] Exemplarily, in each vibration module 200, the magnetic pole of the first magnetic member 221 close to the second magnetic member 222 is opposite to the magnetic pole of the second magnetic member 222 close to the first magnetic member 221, so that a magnetic field for driving the coil 210 to move can be formed between the first magnetic member 221 and the second magnetic member 222.
[0035] Exemplarily, each vibration module 200 includes a plurality of second magnetic members 222 , and the magnetic poles of the plurality of second magnetic members 222 on a side close to the first magnetic member 221 are the same, thereby enhancing the driving force provided by the magnetic field.
[0036] In some embodiments, in each vibration module 200, the coil 210 is wound in the same direction on the first magnetic member 221, and the input ends of the coil 210 of each vibration module 200 are connected to each other, and the output ends of the coil 210 of each vibration module 200 are connected to each other, so that the coil 210 in each vibration module 200 has a current direction after being powered on (refer to Figure 1 When the coils 210 are powered on, the common input end of each coil 210 is used to connect to the positive pole of an external power source (not shown in the figure), and the common output end of each coil 210 is used to connect to the negative pole of the external power source.
[0037] Based on this, since the magnetic field direction of the magnetic field in each vibration module 200 is the same and the current direction of the coil 210 is the same after being energized, the coil 210 in each vibration module 200 is subjected to the same Lorentz force direction after being energized, and can jointly push the diaphragm 100 to move in the same direction.
[0038] In some embodiments, in order to ensure that each position of the diaphragm 100 can be supported by the coil 210 and to improve the uniformity of the coil 210 pushing the diaphragm 100 as much as possible, the size and / or number of the vibration modules 200 can be adjusted so that the diaphragm 100 is completely covered by multiple vibration modules 200.
[0039] In some embodiments, the shape of the diaphragm 100 is rectangular, and the length of the diaphragm 100 may be 20 mm to 60 mm, and the width may be 20 mm to 60 mm.
[0040] It is understandable that, for a rectangular diaphragm, the non-uniformity of the diaphragm vibration is more obvious at a large size. And the diaphragm size range provided in the embodiment of the present disclosure is a preferred size range for using multiple vibration modules 200 to drive the diaphragm 100 to move. When the coil speaker is smaller than this size range, the non-uniformity of the diaphragm 100 vibration is weak, and the problem of weakened center vibration is not obvious. When the coil speaker is larger than this size range, more vibration modules 200 may be required to achieve uniform vibration of the diaphragm 100, which may increase costs.
[0041] Accordingly, in each vibration module 200, the number of the second magnetic member 222 can be multiple ( Figure 1 The plurality of second magnetic members 222 surround a rectangular outer contour of the vibration module 200 , so that the plurality of vibration modules 200 can completely cover the rectangular diaphragm 100 .
[0042] For example, the rectangular outer contour of the vibration module 200 may have a length of 10 mm to 20 mm and a width of 10 mm to 20 mm.
[0043] The following will be combined Figure 2 Describe the fixing method of each component in the embodiment of the present disclosure, Figure 2 Another structural schematic diagram of a coil horn in an embodiment of the present disclosure is shown.
[0044] Please refer to Figure 2In the solution provided by the embodiment of the present disclosure, the diaphragm 100 can be fixedly connected to the front cover 400 of the coil speaker. The magnetic isolation plate 300 and the first magnetic part 221 and the second magnetic part 222 in each vibration module of the plurality of vibration modules are fixedly connected to the magnetic bowl 500 of the coil speaker. The coil 210 in each vibration module can be fixed at a position where the diaphragm 100 is close to the first magnetic part 221 of the vibration module.
[0045] In some embodiments, the front cover 400 and the magnetic bowl 500 of the coil speaker may be directly fixedly connected, or may be fixedly connected by installing a basin frame (not shown in the figure), which is not limited in the embodiments of the present disclosure.
[0046] In some embodiments, a dome 600 may be further provided on the side of the diaphragm 100 away from the vibration module to enhance the amplitude of the diaphragm 100 and the sound effect of the coil speaker.
[0047] The embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
[0048] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.
Claims
1. A coil speaker, characterized in that: include: A diaphragm and a plurality of vibration modules, wherein the plurality of vibration modules are arranged on the same side of the diaphragm, and a magnetic isolation plate is arranged between two adjacent vibration modules; Each of the plurality of vibration modules comprises a coil and a magnetic component, wherein the magnetic component comprises a first magnetic component and a second magnetic component arranged around the first magnetic component; the coil is wound around the outside of the first magnetic component and has a gap between the coil and the first magnetic component; The coil of each vibration module in the plurality of vibration modules is fixedly connected to the vibration membrane.
2. The coil speaker according to claim 1, characterized in that: For each vibration module among the plurality of vibration modules, a magnetic field is formed between the first magnetic member and the second magnetic member, and the magnetic field directions of the magnetic fields in each vibration module are the same.
3. The coil speaker according to claim 2, characterized in that: For each vibration module among the multiple vibration modules, the coil and the magnetic flux lines of the magnetic field are perpendicular to each other, and the diaphragm and the magnetic flux lines of the magnetic field are parallel to each other.
4. The coil speaker according to claim 1, characterized in that: For each vibration module among the plurality of vibration modules, the coil is wound in the same direction on the first magnetic member.
5. The coil speaker according to claim 1, characterized in that: In the plurality of vibration modules, input ends of the coils of each vibration module are connected to each other, and output ends of the coils of each vibration module are connected to each other.
6. The coil speaker according to claim 1, characterized in that: For each vibration module of the plurality of vibration modules, a magnetic pole of a side of the first magnetic member close to the second magnetic member is opposite to a magnetic pole of a side of the second magnetic member close to the first magnetic member.
7. The coil horn according to claim 1 or 6, characterized in that: For each of the plurality of vibration modules, there are a plurality of second magnetic members, and the magnetic poles of the plurality of second magnetic members on a side close to the first magnetic member are the same.
8. The coil speaker according to claim 1, characterized in that: The diaphragm is fixedly connected to the front cover of the coil speaker, and the magnetic isolation plate and the first magnetic component and the second magnetic component in each vibration module of the multiple vibration modules are fixedly connected to the magnetic bowl of the coil speaker.
9. The coil speaker according to claim 1, characterized in that: The diaphragm is in a rectangular shape, and has a length of 20 mm to 60 mm and a width of 20 mm to 60 mm.
10. The coil horn according to any one of claims 1, 8 and 9, characterized in that: For each of the multiple vibration modules, the number of the second magnetic members is multiple, and the multiple second magnetic members surround a rectangular outer contour of the vibration module, so that the multiple vibration modules can completely cover the rectangular vibration membrane.