Loudspeaker and sound box

Abstract

The invention provides a loudspeaker and a sound box, and the loudspeaker comprises a voice coil which is internally provided with an air cavity; the cone basin is connected with the voice coil; the outer dustproof cover is connected with the conical basin, and the hardness of the outer dustproof cover is smaller than that of the conical basin; the inner dustproof cover and the outer dustproof cover form a sound cavity, and the sound cavity and the air cavity are isolated through the inner dustproof cover. According to the loudspeaker and the sound box provided by the invention, the high-frequency performance of an existing loudspeaker can be improved, and the loudspeaker in the closed sound box can have a better high-frequency playing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of audio playback equipment, and in particular to a loudspeaker and a sound box. Background Art

[0002] Speakers are common audio playback devices in our daily lives, used to connect to computers or mobile phones (wired / wireless) for playback.

[0003] A speaker is a device in a sound box that converts electrical signals into sound, and is an audio transmission unit. Currently, to achieve better bass effects, the speaker housing and speaker are enclosed in a closed enclosure, and a radiator (a passive vibration unit) is installed on the speaker. This radiator relies on the air pressure changes generated by the vibration of the speaker to generate vibrations, enhancing the bass.

[0004] The diaphragm of the speaker used in the existing closed speaker is usually a paper cone with an integrated structure. However, since the material of the paper cone is relatively hard, the diaphragm cannot adapt well to the high-frequency sound source, resulting in poor high-frequency sound performance of the speaker. Summary of the Invention

[0005] Based on the above situation, the main purpose of the present invention is to provide a speaker and a sound box to solve the problem that the existing speakers or sound boxes have poor performance in playing high-frequency sounds.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A loudspeaker, comprising:

[0008] a voice coil, wherein an air cavity is provided in the voice coil;

[0009] a cone connected to the voice coil;

[0010] An outer dust cover, the outer dust cover is connected to the cone, and the hardness of the outer dust cover is less than the hardness of the cone;

[0011] An inner dust cover, wherein the inner dust cover and the outer dust cover form a sound cavity, and the sound cavity and the air cavity are isolated by the inner dust cover.

[0012] Preferably, the cone includes a first membrane surface and a first side edge, and the outer dust cover includes a second membrane surface and a second side edge;

[0013] The first side is fixed to the outer periphery of the voice coil, the second side is fixed to the edge of the second diaphragm surface, and the second side is fixed to the inner side of the first diaphragm surface.

[0014] Preferably, the second membrane surface is an arched surface.

[0015] Preferably, the edge diameter of the second membrane surface is d, and the upper edge diameter of the first membrane surface is D;

[0016] Among them, 2 / 5D≤d≤3 / 5D.

[0017] Preferably, the inner dust cover is fixed to the port of the voice coil.

[0018] Preferably, the inner dust cover comprises a closed surface, a closed ring and a connecting ring, and a mounting groove is formed between the closed ring and the connecting ring;

[0019] The closed surface is located on the inner circumference of the closed ring. The closed ring can be pressed against the inner circumference of the voice coil. The mounting groove can be mounted and fixed on the end of the voice coil.

[0020] Preferably, the inner dust cover is fixed to the inside of the cone.

[0021] Preferably, the inner dust cover and the cone are an integrally formed structure.

[0022] Preferably, the cone is made of paper film, plastic film or PP film;

[0023] The outer dust cover is a soft silk film.

[0024] The present application also provides a sound box, comprising a shell and a radiation basin, wherein the radiation basin is fixed to the side of the shell, and further comprising the above-mentioned speaker, wherein the speaker is fixed in the shell, and the speaker encloses the inner cavity of the shell.

[0025] The present invention has the following beneficial effects: In the prior art, in order to enhance the bass effect of a speaker, the interior of the speaker is enclosed. To achieve this, a dust cover is typically provided in the middle of a paper cone. The dust cover can be enclosed at the top of the voice coil or integrally formed with the paper cone, thereby enclosing the speaker and enhancing the bass effect. However, in the aforementioned technology, the paper cone is relatively hard, which only provides good sound performance for low-frequency sound sources. When playing high-frequency sound sources, the hardness of the paper cone limits its vibration frequency. Therefore, during the research and development process, those skilled in the art hope to bond a soft diaphragm to a hard diaphragm to form a speaker capable of producing better high-frequency sound. However, when using this technology, the direct combination of soft and hard diaphragms generates negative pressure due to the air flow in the closed speaker. Air flows from the air cavity of the voice coil into the position of the soft diaphragm and impacts the soft diaphragm. Due to its relatively soft material, the air pressure directly deforms the soft diaphragm, resulting in sound distortion.

[0026] In this application, an inner dust cover is used to isolate the air cavity from the sound cavity, preventing the gas in the voice coil from flowing into the sound cavity. This prevents pressure fluctuations inside the speaker from impacting the outer dust cover. The outer dust cover maintains its shape when the speaker is operating, allowing the outer dust cover to generate high-frequency vibrations due to its softer material when playing high-frequency sound sources, allowing the speaker to produce higher-quality high-frequency sound. This solves the problem of the outer dust cover deforming due to the air pressure generated by the combination of the hard cone and the soft outer dust cover, optimizes the high-frequency performance of existing speakers, and enables speakers in closed speaker enclosures to achieve better playback effects.

[0027] Other beneficial effects of the present invention will be explained through the introduction of specific technical features and technical solutions in the specific implementation methods. Those skilled in the art should be able to understand the beneficial technical effects brought about by the introduction of these technical features and technical solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The figure is a structural diagram of a loudspeaker of the present invention.

[0029] Figure 2 The present invention is a cross-sectional view showing a sound cavity of a loudspeaker.

[0030] Figure 3 The present invention is a cross-sectional view showing an inner dust cover of a speaker.

[0031] Figure 4 A cross-sectional view of another embodiment of a loudspeaker according to the present invention.

[0032] Figure 5 This is an enlarged schematic diagram of part A.

[0033] Figure 6 The present invention provides a graph of experimental data comparing the speaker enclosure of the speaker provided in the present application with the speaker enclosure of an existing speaker.

[0034] Figure 7 The figure is a structural diagram of a speaker of the present invention.

[0035] Figure 8 This is a cross-sectional view showing the inner cavity of a speaker according to the present invention.

[0036] Description of reference numerals:

[0037] 1. Support assembly; 11. Basin frame; 111. Connecting piece; 112. First basin-shaped portion; 113. Second basin-shaped portion; 12. Rubber edge; 121. Holding portion; 122. Bending portion; 2. Magnetic assembly; 21. Washer; 22. Magnet; 23. T-iron; 24. Magnetic slot; 3. Voice coil; 31. Air cavity; 4. Cone basin; 41. First diaphragm surface; 42. First side; 5. Outer dust cover; 51. Sound cavity; 52. Second diaphragm surface; 53. Second side; 6. Inner dust cover; 61. Closing surface; 62. Closing ring; 63. Connecting ring; 64. Mounting slot; 7. Speaker box; 71. Outer shell; 72. Upper cover; 73. Radiating basin; 74. Speaker; 75. Inner cavity. DETAILED DESCRIPTION

[0038] The present invention is described below based on the following embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail. In order to avoid obscuring the essence of the present invention, well-known methods, processes, procedures, and components are not described in detail.

[0039] Furthermore, persons of ordinary skill in the art will appreciate that the figures provided herein are for illustration purposes only and are not necessarily drawn to scale.

[0040] Unless the context clearly requires otherwise, throughout the specification and claims, the words "include," "comprising," and similar words should be construed in an inclusive sense rather than an exclusive or exhaustive sense; that is, in the sense of "including but not limited to."

[0041] In the description of the present invention, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0042] Reference Figure 1-2 The present invention provides a loudspeaker comprising a support assembly 1, a magnetic assembly 2, a voice coil 3, a cone 4, an outer dust cover 5, and an inner dust cover 6. The support assembly 1 is fixed within a housing 71 of a loudspeaker 7, securing the entire loudspeaker 74 within the housing 71 of the loudspeaker 7. The magnetic assembly 2 is fixed within the support assembly 1 and is capable of generating a magnetic field. The voice coil 3, which includes a conductive wire, can be disposed within the magnetic assembly 2 to create a magnetic field. When energized, the conductive wire generates a surrounding magnetic field that interacts with the magnetic assembly 2 according to the principle of electromagnetic induction, driving the voice coil 3 to move. The cone 4, outer dust cover 5, and inner dust cover 6 are connected to the voice coil 3 and are capable of moving with the movement of the voice coil 3.

[0043] Reference Figure 2The support assembly 1 includes a basin frame 11 and a rubber edge 12. The basin frame 11 is connected to the outer shell 71, and the rubber edge 12 can be used to connect the basin frame 11 and the cone 4. The basin frame 11 includes a connecting piece 111, a first basin-shaped portion 112, and a second basin-shaped portion 113. The connecting piece 111 can be fixed to the inside of the outer shell 71, the first basin-shaped portion 112 is connected to the connecting piece 111, and the second basin-shaped portion 113 is connected to the first basin-shaped portion 112. A circular groove is opened in the middle of the second basin-shaped portion 113, and the circular groove can be used to install and fix the magnetic assembly 2.

[0044] The rubber edge 12 includes a holding portion 121 and a bent portion 122. The holding portion 121 is connected to the outer ring of the bent portion 122 and can be bonded to the connecting piece 111. When the upper cover 72 of the speaker 7 is connected to the outer shell 71, it can press the connecting piece 111 and the rubber edge 12 tightly, maintaining the airtight state of the speaker 7. The bent portion 122 and the cone 4 can be bonded and fixed, and this tight bonding prevents the components from falling off during vibration.

[0045] The magnetic assembly 2 is bonded and fixed within the circular groove. It includes a washer 21, a magnet 22, and a T-iron 23. Both the washer 21 and the magnet 22 are nested within the T-iron 23 and are bonded and fixed together using glue. The washer 21 and the second basin-shaped portion 113 are also bonded and fixed together. The magnet 22 has two magnetic poles: the north pole near the washer 21 and the south pole near the T-iron 23. The washer 21 connects to the north pole, and the T-iron 23 connects to the south pole. The cylindrical portion of the T-iron 23 extends through the inner ring of the magnet 22, forming a magnetic groove 24 with a magnetic field. The voice coil 3 can be inserted into the magnetic groove 24. When power is applied to the voice coil 3, it generates a surrounding magnetic field that acts on the magnetic groove 24, causing it to vibrate within the groove. This, in turn, drives the cone 4 and the outer dust cover 5 to vibrate in the air, producing sound.

[0046] Cone 4 is disposed within first basin-shaped portion 112. The edge of cone 4 is bonded to the rubber membrane, and one end of cone 4 is connected to voice coil 3, so that when voice coil 3 vibrates, it drives cone 4 to vibrate. An outer dust cover 5 is connected to cone 4 and can vibrate with cone 4. The outer dust cover 5 is less hard than the cone 4. An inner dust cover 6 is disposed within the space formed by cone 4 and outer dust cover 5. The inner dust cover 6 and outer dust cover 5 form a sound cavity 51, which isolates air cavity 31 from sound cavity 51.

[0047] In the prior art, to enhance the bass effect of the speaker 7, a closed environment 62 is formed inside the speaker 7. To seal the speaker 7, a dust cover is typically provided in the middle of the paper cone. The dust cover can be sealed to the top of the voice coil 3 or integrally formed with the paper cone, thereby sealing the speaker 7 and enhancing the bass effect of the speaker 7. However, in the aforementioned technology, the paper cone is relatively hard, and can only provide good sound performance for low-frequency sound sources. When playing high-frequency sound sources, the hardness of the paper cone limits its vibration frequency. Therefore, during the research and development process, those skilled in the art hope to bond a soft diaphragm to a hard diaphragm to form a speaker 74 capable of producing better high-frequency sound. However, when using this technology, the direct combination of the soft and hard diaphragms generates negative pressure due to the air flow in the closed speaker 7. Air will flow from the air cavity 31 of the voice coil 3 into the position of the soft diaphragm and impact the soft diaphragm. Due to its relatively soft material, the air pressure directly deforms the soft diaphragm, resulting in sound distortion.

[0048] In the present application, an inner dust cover 6 is used to isolate the air cavity 31 from the sound cavity 51, preventing the gas in the air cavity 31 in the voice coil 3 from flowing into the sound cavity 51, so that the pressure fluctuations of the gas inside the speaker 7 will not impact the outer dust cover 5. When the speaker 74 is working, the shape of the outer dust cover 5 is maintained, so that when playing high-frequency sound sources, the outer dust cover 5 can rely on its own soft material to generate high-frequency vibrations, allowing the speaker 74 to play higher-quality high-frequency sounds. The speaker 74 of the present application solves the problem of deformation of the outer dust cover 5 caused by the air pressure generated by the combination of the hard cone 4 and the soft outer dust cover 5, and at the same time solves the problem of poor high-frequency performance of the existing speaker 74, so that the speaker 74 in the closed speaker 7 has a better playback effect.

[0049] Reference Figure 3 As an embodiment, the inner dust cover 6 is fixed to the port of the voice coil 3. The inner dust cover 6 includes a closed surface 61, a closed ring 62, and a connecting ring 63. A mounting groove 64 is formed between the closed ring 62 and the connecting ring 63. The closed surface 61 is located on the inner periphery of the closed ring 62. The closed ring 62 can be tightly pressed against the inner periphery of the voice coil 3. The mounting groove 64 can be mounted and fixed to the end of the voice coil 3. The inner dust cover 6 is located inside the port of the voice coil 3. The closed ring 62 can increase the closed area with the inner side of the voice coil 3, improving the cover effect. The mounting groove 64 can quickly fix the inner dust cover 6 to the voice coil 3. This prevents the flow of air between the air cavity 31 and the sound cavity 51, thereby isolating the air cavity 31 from the sound cavity 51.

[0050] Reference Figure 4As another embodiment, the inner dust cover 6' is fixed to the inner circumference of the cone 4' and can be integrally formed with the cone 4', which can separate the air cavity 31' and the sound cavity 51'. Compared with the prior art, it can still achieve the effect of improving the high-frequency sound performance. However, this embodiment will cause the inner dust cover 6' to be closer to the outer dust cover 5', and the size of the sound cavity 51' is smaller. When the outer dust cover 5' vibrates rapidly, it may contact the inner dust cover 6', affecting the sound performance. If the position of the outer dust cover 5' is moved to adjust the position of the outer dust cover 5' and the inner dust cover 6', the size of the outer dust cover 5' will become larger, making the wavelength of the outer dust cover 5' longer, resulting in a lower vibration frequency of the outer dust cover 5' and weakening the high-frequency sound performance.

[0051] Reference Figure 5 As an embodiment, the cone 4 is a conical structure, and the unfolded shape of the cone 4 along its generatrix is ​​a fan-shaped surface. The cone 4 includes a first membrane surface 41 and a first side 42, and the outer dust cover 5 includes a second membrane surface 52 and a second side 53. The first side 42 is fixed to the edge of the first membrane surface 41, and the first side 42 is bonded and fixed to the outer periphery of the voice coil 3. The second side 53 is fixed to the edge of the second membrane surface 52, and the second side 53 is bonded and fixed to the inner side of the first membrane surface 41. The second side 53 can provide a bonding position for the first membrane surface 41 and the second membrane surface 52 to be stably bonded, so that a closed surface 61 can be formed between the cone 4 and the outer dust cover 5, thereby forming a closed sound cavity 51. Furthermore, the second membrane surface 52 is an arched surface, which can increase the volume of the sound cavity 51 and at the same time increase the distance between the second membrane surface 52 and the inner dust cover 6.

[0052] As an embodiment, the closed line formed by the edge of the second diaphragm surface 52 is a second circular line with a diameter of d, and the closed line formed by the edge of the first diaphragm surface 41 away from the voice coil 3 is a first circular line with a diameter of D.

[0053] Among them, 2 / 5D≤d≤3 / 5D. The second membrane surface 52 is limited to the above-mentioned size range, which can make the outer dust cover 5 have an appropriate wavelength, better adapt to high-frequency vibrations, and improve the playback effect of the speaker 74. It should be understood by those skilled in the art that the above-mentioned dimensions of the first membrane surface 41 and the second membrane surface 52 are not fixed. Even if the diameter of the second circle line d is out of the above-mentioned range, the high-frequency sound performance is better than that of the speaker 74 in the prior art. It only means that the size of the second membrane surface 52 within the above-mentioned range can have better high-frequency performance and can make the transition from low frequency to high frequency sound smoother.

[0054] As an embodiment, the cone 4 is made of a paper film, plastic film, or PP film, and the outer dust cover 5 is a soft silk film. The soft silk film can be made of silk, which is soft and lightweight. The softness of the soft silk film material can better reproduce the high-frequency components of the human voice or music, and has good high-frequency extension. It should be noted that soft silk film materials are state-of-the-art in the audio field, and their manufacturing methods and specific structural properties are not described in detail in this application. Furthermore, it is understood that the outer dust cover 5 can also be made of other soft films, including but not limited to soft metal films.

[0055] To illustrate the high frequency effect of the speaker provided in this embodiment, refer to Figure 6 , wherein A in the figure is a paper cone with an integrated structure used in the prior art, and B is the speaker structure of the present application, the cone 4 is a paper cone, the outer dust cover 5 is a soft silk membrane, and the inner dust cover 6 made of PP material is used to isolate the sound cavity and the air cavity. The horizontal axis is the frequency of the sound, and the vertical axis is the sound pressure of the sound. The test was conducted in an anechoic room environment at 1 meter and 1 watt (the sound pressure value generated at an axial distance of 1 meter when a 1 watt power signal is input into the speaker). It can be seen from the results that the speaker structure of the present application has better sensitivity in the speaker than the prior art, and can significantly improve the loudness of the sound in the high-frequency area, so that the user can clearly hear higher-frequency sounds, ensuring that the played sound has high fidelity.

[0056] Reference Figure 7 and Figure 8 The present application also provides a speaker 7, which includes a shell 71, an upper cover 72, a radiation basin 73 and the above-mentioned speaker 74. The shell 71 is provided with an inner cavity 75, and the speaker 74 can be located in the inner cavity. The rubber edge 12 in the speaker 74 can be located between the shell 71 and the upper cover 72. As the shell 71 and the upper cover 72 can be fixed by bolts, the rubber edge 12 can be clamped to fix the speaker 74 in the shell 71 and seal the inner cavity 75 of the shell 71, so that the interior of the speaker 7 is sealed. The radiation basin 73 is fixed on both sides of the shell 71. The speaker 74 and the radiation basin 73 cooperate with the sealed inner cavity 75 to enhance the bass effect of the entire speaker 7. The speaker 7 provided by the present application, on the one hand, has a good bass presentation effect due to its closed characteristics. On the other hand, the speaker 74 used therein relies on the combination of the first membrane surface 41 and the soft second membrane surface 52 to better restore the high-frequency part of human voice or music, and has a good music playback effect.

[0057] Those skilled in the art will appreciate that, provided there is no conflict, the above preferred solutions can be freely combined and superimposed.

[0058] It should be understood that the above-mentioned embodiments are merely illustrative and non-restrictive. Without departing from the basic principles of the present invention, various obvious or equivalent modifications or substitutions that can be made by those skilled in the art to the above-mentioned details will be included in the scope of the claims of the present invention.

Claims

1. A loudspeaker, characterized in that: include: a voice coil, wherein an air cavity is provided in the voice coil; a cone connected to the voice coil; An outer dust cover, the outer dust cover is connected to the cone, and the hardness of the outer dust cover is less than the hardness of the cone; An inner dust cover, wherein the inner dust cover and the outer dust cover form a sound cavity, and the sound cavity and the air cavity are isolated by the inner dust cover.

2. The loudspeaker according to claim 1, wherein The cone includes a first membrane surface and a first side edge, and the outer dust cover includes a second membrane surface and a second side edge; The first side is fixed to the outer periphery of the voice coil, the second side is fixed to the edge of the second diaphragm surface, and the second side is fixed to the inner side of the first diaphragm surface.

3. The loudspeaker according to claim 2, wherein The second membrane surface is an arched surface.

4. The loudspeaker according to claim 3, wherein The edge diameter of the second membrane surface is d, and the upper edge diameter of the first membrane surface is D; Among them, 2 / 5D≤d≤3 / 5D.

5. The loudspeaker according to claim 1, wherein The inner dust cover is fixed to the port of the voice coil.

6. The loudspeaker according to claim 5, wherein The inner dust cover comprises a closed surface, a closed ring and a connecting ring, wherein a mounting groove is formed between the closed ring and the connecting ring; The closed surface is located on the inner circumference of the closed ring. The closed ring can be pressed against the inner circumference of the voice coil. The mounting groove can be mounted and fixed on the end of the voice coil.

7. The loudspeaker according to claim 1, wherein The inner dust cover is fixed inside the cone.

8. The loudspeaker according to claim 7, wherein The inner dust cover and the cone are an integrally formed structure.

9. The loudspeaker according to any one of claims 1 to 8, wherein: The cone is made of paper film, plastic film or PP film; The outer dust cover is a soft silk film.

10. A speaker, comprising a housing and a radiation basin, wherein the radiation basin is fixed to the side of the housing, characterized in that: It also includes the loudspeaker according to any one of claims 1 to 9, wherein the loudspeaker is fixed in the housing, and the inner cavity of the housing is enclosed by the loudspeaker.

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