Vibrating diaphragm assembly, loudspeaker and vehicle

Abstract

The utility model discloses a vibrating diaphragm assembly, a loudspeaker and a vehicle, the vibrating diaphragm assembly comprises a second vibrating diaphragm and two layers of first vibrating diaphragms, the two layers of first vibrating diaphragms are respectively attached to two sides of the second vibrating diaphragm, and the second vibrating diaphragm is a colloidal crystal film. According to the embodiment of the invention, the second vibrating diaphragm is formed by adopting the colloidal crystal film, and the thickness of the vibrating diaphragm assembly can be changed when needed by utilizing the characteristic that the colloidal crystal film can be deformed under the action of voltage, so that the vibrating diaphragm assembly can be used for sound sources with different frequencies, and the sound production quality of the loudspeaker is improved.

Description

Technical Field

[0001] The present application relates to the field of loudspeakers, and in particular to a diaphragm assembly, a loudspeaker and a vehicle. Background Art

[0002] The main component of a speaker is the diaphragm, which determines the effective frequency range, distortion, and sound quality of the speaker. The performance of the diaphragm is affected by the geometric thickness of the diaphragm. In some cases, the thickness of the speaker's diaphragm is fixed, and the vibration amplitude of the diaphragm is relatively constant, resulting in the speaker being able to reproduce only audio signals from a sound source of a specific frequency. Utility Model Content

[0003] The present application provides a diaphragm assembly, a loudspeaker and a vehicle, aiming to improve the problem that the diaphragm of the existing loudspeaker cannot be adjusted according to sound sources of different frequencies.

[0004] In order to achieve the above technical effects, a technical solution adopted by the present application is: to provide a diaphragm assembly, comprising:

[0005] Two layers of first diaphragm;

[0006] The second diaphragm, the two layers of the first diaphragm are respectively attached to the two sides of the second diaphragm, and the second diaphragm is a colloidal crystal film.

[0007] In some examples, the first diaphragm is a plastic layer or a carbon fiber layer.

[0008] In some examples, the first diaphragm and the second diaphragm are bonded together.

[0009] The present application also proposes an example of a speaker, comprising:

[0010] A diaphragm assembly as in any of the above examples;

[0011] A voice coil and a magnetic circuit system, wherein the voice coil and the magnetic circuit system are arranged on the same side of the diaphragm assembly, the voice coil is connected to the first diaphragm of the diaphragm assembly, and the magnetic circuit system is used to generate magnetic force to drive the voice coil to vibrate;

[0012] a power circuit connected to the second diaphragm of the diaphragm assembly; and

[0013] The controller is connected to the power circuit, and is used to control the voltage outputted from the power circuit to the second diaphragm.

[0014] In some examples, the speaker also includes:

[0015] The electric control board, the magnetic circuit system and the controller are respectively connected to the electric control board by electrical signals. The electric control board is used to input electrical signals to the magnetic circuit system; the controller is also used to control the voltage output by the power supply circuit to the second diaphragm according to the electrical signals.

[0016] In some examples, the diaphragm assembly forms an arched structure that arches away from the voice coil and the magnetic circuit system.

[0017] In some examples, the second diaphragm has a first end and a second end that are oppositely disposed along a circumferential direction of the arch structure, and the power circuit is connected to the first end and the second end of the second diaphragm, respectively.

[0018] In some examples, the speaker also includes:

[0019] The diffuser is connected to the magnetic circuit system, and the diffuser cover is arranged on the side of the diaphragm assembly away from the voice coil.

[0020] In some examples, the two first diaphragms are respectively disposed on both sides of the second diaphragm along the first direction, and the cross section of the diaphragm assembly along the first direction is rectangular.

[0021] The present application also proposes an example of a vehicle, comprising a speaker as described in any of the above examples.

[0022] The above scheme uses a colloidal crystal film to form a second diaphragm. By utilizing the characteristic of the colloidal crystal film that it can deform under the action of voltage, the diaphragm assembly can produce thickness changes when needed, thereby enabling the diaphragm assembly to be used for sound sources of different frequencies, thereby improving the sound quality of the speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 is a structural schematic diagram of an example of a diaphragm assembly of the present application;

[0025] Figure 2 is a structural schematic diagram of another example of the diaphragm assembly of the present application;

[0026] Figure 3 is a structural schematic diagram of another example of the diaphragm assembly of the present application;

[0027] Figure 4 is a structural schematic diagram of yet another example of the diaphragm assembly of the present application;

[0028] Figure 5 is a structural diagram of an example of a loudspeaker of the present application;

[0029] Figure 6 It is a schematic diagram of the structural module of an example of a loudspeaker of the present application.

[0030] Among them: 100, speaker; 110, voice coil; 120, magnetic circuit system; 121, magnetic upper plate; 122, magnetic lower plate; 123, magnet; 130, electronic control board; 140, power circuit; 141, positive electrode; 142, negative electrode; 150, controller; 160, diffuser; 170, support plate; 180, pad; 190, back cavity cover; 191, sound absorbing material; 200, diaphragm assembly; 210, first diaphragm; 220, second diaphragm; 3a, first direction; 3b, second direction. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0032] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present application.

[0034] The multiple terms in the examples of this application refer to at least two (including two).

[0035] The tweeter is the sound reproduction unit responsible for the high frequency part of the sound. Because the frequency is relatively high, the diaphragm will also be made relatively thin, so that it can adapt to high-frequency vibration. The characteristic of the tweeter is that it can vibrate quickly to produce sound, but its vibration amplitude is usually relatively small. Therefore, this type of speaker generally uses a relatively thin and tough diaphragm, and the area, that is, the caliber, is relatively small. When the tweeter does not make a sound, the sound of the speaker will be fuzzy and dull, and no longer transparent and clear. The woofer is responsible for the sound reproduction of the low frequency part. The vibration of the low frequency part is larger and relatively slow, so there is a thicker diaphragm and a restored voice coil. The low frequency part is not as easy to damage as the high frequency part. The bass part is the part with the largest amplitude of air vibration, and the vibration of the air can be clearly felt by touch. Therefore, the characteristic of the woofer is that it has a large enough amplitude to drive the air to produce a high field pressure. Due to the large amplitude, the diaphragm is generally composed of a multi-layer combination of lightweight and high-strength fibers to ensure light weight and good rigidity. The sense of direction of the bass is very weak, and it is difficult for the human ear to distinguish the direction of the sound, so it is generally not necessary to place a separate woofer.

[0036] In some cases, the speaker's diaphragm can only match sound sources of a fixed frequency and cannot make dynamic adjustments based on sound sources of different frequencies, nor can it make subtle adjustments based on different car models and different spaces.

[0037] See also Figures 1 to 4 The present application proposes an example of a diaphragm assembly 200, which includes a second diaphragm 220 and two layers of first diaphragms 210, the two layers of first diaphragms 210 are respectively attached to the two sides of the second diaphragm 220, and the second diaphragm 220 is a colloidal crystal film.

[0038] The two layers of first diaphragms 210 are arranged at intervals, and the second diaphragm 220 is arranged in the gap between the two layers of first diaphragms 210. The two layers of first diaphragms 210 are attached to both sides of the second diaphragm 220, so that the diaphragm assembly 200 forms a three-layer structure. In this example, the two layers of first diaphragms 210 can be connected to each other through the second diaphragm 220, and the total thickness of the diaphragm assembly 200 includes the thickness of the second diaphragm 220 and the thickness of the two layers of first diaphragms 210.

[0039] The second diaphragm 220 is a colloidal crystal film, which is an electrically expandable polymer material. The electrically expandable polymer material refers to a high molecular substance formed by the reaction of multiple monomer molecules. Since the polymer contains a large number of chemical bonds, when current passes through, the molecular movement is accelerated, the internal temperature rises, and the polymer material expands.

[0040] Please refer to Figure 5In this example, the second diaphragm 220 is formed by using a colloidal crystal film, so that when the diaphragm assembly 200 is used in the speaker 100, the thickness of the second diaphragm 220 can be changed by changing the voltage applied to the second diaphragm 220, and then the total thickness of the diaphragm assembly 200 can be changed, so that it can be used to reproduce sound sources of different frequencies, and then it can have a better sound effect. After the diaphragm assembly 200 in this example is dynamically adjusted according to the sound sources of different frequencies, it can be used in different car models and different spaces, thereby expanding the use scenarios of the diaphragm assembly 200 and improving the sound quality of the speaker.

[0041] See also Figure 1 and Figure 2 The diaphragm assembly 200 in the example of the present application can be arranged in an arched shape so that the diaphragm assembly 200 can be used for a dome-shaped dynamic coil speaker. When the voltage applied to the second diaphragm 220 changes, the thickness of the second diaphragm 220 changes. As the thickness of the second diaphragm 220 increases or decreases, the total thickness of the diaphragm assembly 200 also changes synchronously, thereby enabling the diaphragm assembly 200 to be used for the reproduction of sound sources of different frequencies. Please refer to Figure 3 and Figure 4 The cross-section of the diaphragm assembly 200 in the example of the present application along the thickness direction may also be rectangular, and the two layers of the first diaphragm 210 may be arranged on both sides of the second diaphragm 220 along the thickness direction. The thickness direction in the example of the present application may be the first direction 3a. When the voltage applied to the second diaphragm 220 changes, the thickness of the second diaphragm 220 also changes, thereby causing the total thickness of the diaphragm assembly 200 in the first direction 3a to change synchronously.

[0042] In some examples, the first diaphragm 210 is a plastic layer or a carbon fiber layer. In this example, the plastic layer may be a polypropylene layer or may be made of other thermoplastics. In this example, the first diaphragm 210 may also be a carbon fiber layer, which has high strength, light weight, and high elastic modulus. When the second diaphragm 220 is deformed, it can drive the first diaphragm 210 to deform adaptively, thereby changing the overall thickness of the diaphragm assembly 200.

[0043] In some examples, the first diaphragm 210 and the second diaphragm 220 are bonded together, and when the voltage applied to the second diaphragm 220 changes, the thickness of the second diaphragm 220 changes, and the second diaphragm 220 can drive the first diaphragm 210 to produce adaptive deformation.

[0044] See also Figure 5 and Figure 6The present application also proposes an example of a loudspeaker 100, including a diaphragm assembly 200, a voice coil 110 and a magnetic circuit system 120, a power supply circuit 140 and a controller 150 as described in any of the above examples; the voice coil 110 and the magnetic circuit system 120 are arranged on the same side of the diaphragm assembly 200, the voice coil 110 is connected to the first diaphragm 210 of the diaphragm assembly 200, and the magnetic circuit system 120 is used to generate a magnetic force to drive the voice coil 110 to vibrate; the power supply circuit 140 is connected to the second diaphragm 220 of the diaphragm assembly 200; the controller 150 is connected to the power supply circuit 140, and the controller 150 is used to control the voltage output by the power supply circuit 140 to the second diaphragm 220.

[0045] The diaphragm assembly 200 can be used as a vibration element in the speaker 100, and the diaphragm assembly 200 is connected to the voice coil 110. Optionally, in this example, the first diaphragm 210 is connected to the voice coil 110, and when the voice coil 110 vibrates, the first diaphragm 210 can vibrate synchronously with the second diaphragm 220.

[0046] The voice coil 110 and the magnetic circuit system 120 are arranged on the same side of the diaphragm assembly 200. The voice coil 110 is connected to the diaphragm assembly 200. The magnetic circuit system 120 is used to generate magnetic force to drive the voice coil 110 to vibrate. When an audio signal is input, the magnetic circuit system 120 of the speaker 100 will drive the voice coil 110 to vibrate at different frequencies according to the frequency of the sound source, and then the voice coil 110 drives the diaphragm assembly 200 to vibrate. When the voice coil 110 vibrates, it can drive the diaphragm assembly 200 to vibrate, so that the diaphragm assembly 200 can resonate with the surrounding air to produce sound, so as to transmit the sound signal to the outside.

[0047] The power circuit 140 is used to output voltage to the second diaphragm 220 of the diaphragm assembly 200. Optionally, in this example, the power circuit 140 has a positive electrode 141 and a negative electrode 142, and the positive electrode 141 and the negative electrode 142 are respectively connected to different positions of the second diaphragm 220. When the power circuit 140 outputs voltage to the second diaphragm 220, under the action of the voltage, the molecular movement of the electrically expandable polymer material of the second diaphragm 220 is accelerated, and the internal temperature changes, thereby causing the polymer material to expand or contract, thereby changing the thickness of the second diaphragm 220. When the thickness of the second diaphragm 220 changes, the overall thickness of the diaphragm assembly 200 will also change synchronously.

[0048] The controller 150 is connected to the power supply circuit 140 by electrical signals to control the power supply circuit 140 to output the voltage of the second diaphragm 220. The controller 150 in this example can be a voltage regulating circuit, and the controller 150 can also be other integrated circuits. The controller 150 in this example can send an electrical signal to the power supply circuit 140 to change the voltage output by the power supply circuit 140 to the second diaphragm 220, thereby changing the thickness of the second diaphragm 220. Optionally in this example, the controller 150 can control the power supply circuit 140 to maintain a constant voltage so that the thickness of the second diaphragm 220 is maintained at a preset thickness, and the controller 150 can also control the voltage output by the power supply circuit 140 to increase or decrease, thereby increasing or reducing the thickness of the second diaphragm 220. In the example of this application, by using the above-mentioned diaphragm assembly 200 on the speaker 100, the controller 150 can be used to control the voltage output by the power supply circuit 140 to the second diaphragm 220 to enable the speaker 100 to be used for the reproduction of sound sources of different frequencies, thereby improving the sound quality of the speaker 100.

[0049] In some examples, the speaker 100 further includes an electric control board 130, the magnetic circuit system 120 and the controller 150 are respectively connected to the electric control board 130 by electrical signals, and the electric control board 130 is used to input electrical signals to the magnetic circuit system 120; the controller 150 is also used to control the voltage output by the power circuit 140 to the second diaphragm 220 according to the electrical signals. The controller 150 in this example can be integrated on the electric control board 130 of the speaker 100.

[0050] The electric control board 130 can be used as the main control circuit board of the speaker 100. The electric control board 130 is connected to the magnetic circuit system 120, and the sound source signal is input to the electric control board 130. The electric control board 130 can input a frequency signal to the magnetic circuit system 120, and the magnetic circuit system 120 generates a magnetic force to drive the voice coil 110 to vibrate, and the voice coil 110 can drive the diaphragm assembly 200 to vibrate synchronously, thereby producing sound.

[0051] In this example, the controller 150 controls the voltage outputted by the power circuit 140 to the second diaphragm 220 according to the frequency signal inputted by the electric control board 130, and can further adjust the thickness of the second diaphragm 220 according to the sound source signal, so that the voltage applied to the second diaphragm 220 is adapted to the frequency signal inputted by the electric control board 130. In this example, when the electric control board inputs a high-frequency signal to the magnetic circuit system 120, the controller can control the voltage inputted by the power circuit to the second diaphragm to be the first voltage, so as to reduce the thickness of the second diaphragm. When the electric control board inputs a low-frequency signal to the magnetic circuit system, the controller can control the voltage inputted by the power circuit to the second diaphragm to be the second voltage, so as to increase the thickness of the second diaphragm. The first voltage and the second voltage in this example can be preset fixed values, or preset range values.

[0052] Please refer to Figure 1 and Figure 2 In some examples, the diaphragm assembly 200 forms an arched structure that arches away from the voice coil 110 and the magnetic circuit system 120. The loudspeaker 100 in this example may be a dome-shaped dynamic loudspeaker.

[0053] In some examples, the second diaphragm 220 has a first end and a second end that are oppositely disposed along the circumference of the arch structure, and the power circuit 140 is respectively connected to the first end and the second end of the second diaphragm 220. In this example, the first end and the second end of the second diaphragm 220 may be ends of the second diaphragm 220 close to the voice coil 110, and the positive and negative electrodes 142 of the power circuit 140 may be respectively connected to the first end and the second end of the second diaphragm 220.

[0054] Please refer to Figure 3 and Figure 4 In some examples, the two layers of first diaphragms 210 are respectively disposed on both sides of the second diaphragm 220 along the first direction 3a, and the cross-section of the diaphragm assembly 200 along the first direction 3a is rectangular. In this example, the first direction 3a may be the thickness direction of the diaphragm assembly 200, and the second direction 3b may be the length direction of the diaphragm assembly 200. The positive electrode 141 and the negative electrode 142 of the power circuit 140 may be respectively connected to both sides of the diaphragm assembly 200 in the second direction 3b.

[0055] Please refer to Figure 5 In some examples, the speaker 100 further includes a diffuser 160 connected to the magnetic circuit system 120, and the diffuser 160 is disposed on the side of the diaphragm assembly 200 away from the voice coil 110. It is understood that the speaker 100 in the example of the present application may further include a rear cavity cover 190, which is connected to the magnetic circuit system 120, and a sound absorbing material 191 may be disposed in the rear cavity cover 190; the magnetic circuit system 120 may include a magnetic conductive upper plate 121, a magnetic conductive lower plate 122, and a magnet 123 disposed between the magnetic conductive upper plate 121 and the magnetic conductive lower plate 122. A gasket 180 may further be disposed between the magnetic conductive upper plate 121 and the diffuser 160, and the first diaphragm 210 of the diaphragm assembly 200 may be connected to the gasket 180 via a support sheet 170. The magnetic circuit system 120 generates magnetic force to drive the voice coil 110 to vibrate, and the voice coil 110 drives the diaphragm assembly 200 to vibrate synchronously, thereby enabling the speaker 100 to reproduce audio. The speaker 100 in the example of the present application may also have a housing, and a sound outlet may be provided on the housing.

[0056] The present application also provides an example of a vehicle, comprising the speaker 100 as described in any of the above examples.

[0057] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A diaphragm assembly, characterized in that: include: Two layers of first diaphragm; as well as The second diaphragm, two layers of the first diaphragm are respectively attached to two sides of the second diaphragm, and the second diaphragm is a colloidal crystal film.

2. The diaphragm assembly according to claim 1, characterized in that: The first diaphragm is a plastic layer or a carbon fiber layer.

3. The diaphragm assembly according to claim 1 or 2, characterized in that: The first diaphragm and the second diaphragm are bonded to each other.

4. A speaker, characterized in that: include: The diaphragm assembly according to any one of claims 1 to 3; A voice coil and a magnetic circuit system, wherein the voice coil and the magnetic circuit system are arranged on the same side of the diaphragm assembly, the voice coil is connected to the first diaphragm of the diaphragm assembly, and the magnetic circuit system is used to generate magnetic force to drive the voice coil to vibrate; A power circuit connected to the second diaphragm of the diaphragm assembly; as well as A controller is connected to the power circuit, and is used to control the voltage outputted from the power circuit to the second diaphragm.

5. The loudspeaker according to claim 4, characterized in that The speaker also includes: An electric control board, the magnetic circuit system and the controller are respectively connected to the electric control board by electrical signals, and the electric control board is used to input electrical signals to the magnetic circuit system; the controller is also used to control the voltage output by the power supply circuit to the second diaphragm according to the electrical signal.

6. The loudspeaker according to claim 4 or 5, characterized in that: The diaphragm assembly forms an arched structure that arches in a direction away from the voice coil and the magnetic circuit system.

7. The loudspeaker according to claim 6, characterized in that The second diaphragm has a first end and a second end that are oppositely disposed in a circumferential direction of the arch structure, and the power circuit is connected to the first end and the second end of the second diaphragm, respectively.

8. The loudspeaker according to claim 6, characterized in that The speaker also includes: A diffuser is connected to the magnetic circuit system, and the diffuser cover is arranged on a side of the diaphragm assembly away from the voice coil.

9. The loudspeaker according to claim 4 or 5, characterized in that: The two layers of the first diaphragms are respectively arranged on both sides of the second diaphragm along the first direction, and the cross-section of the diaphragm assembly along the first direction is rectangular.

10. A vehicle, characterized in that: Comprising a loudspeaker as claimed in any one of claims 4 to 9.

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