Loudspeaker capable of improving sound pressure accuracy, earphone and sound pressure adjusting method
By forming a sealed space in the speaker and increasing the length of the magnet, combined with the tuning hole gasket thickness and sound pressure testing method, the problem that existing speakers are difficult to adjust the sound of each frequency band is solved, achieving more accurate sound pressure control and wider Sound pressure adjustment range.
Patent Information
- Application Number
- CN202411471721.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2024-12-17
AI Technical Summary
Existing speakers are difficult to achieve high fidelity and sound pressure accuracy adjustment in various frequency bands. The main reason is that the cover with a hollow open structure cannot control the vibration damping force, and the magnet in the earphones is too short, resulting in insufficient movement distance of the coil, so that the low frequency cannot be played. sound.
By forming a relatively sealed space in the speaker, using the gasket thickness on the tuning hole to control the internal air pressure and the elasticity of the paper cone, increasing the length of the magnet to increase the coil movement distance, combining the removable speaker structure and sound pressure testing method, Achieve accurate adjustment of sound pressure.
It realizes more accurate adjustment of sound pressure, expands the coverage of sound pressure adjustment, so that the sound strength can be adaptively adjusted according to actual needs, and improves the sound pressure accuracy of speakers and headphones.
Smart Images
Figure CN119155587A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of speaker structures, and in particular to a speaker, an earphone and a sound pressure adjustment method capable of improving sound pressure accuracy. Background Art
[0002] The frequency range of sound that the human ear can hear is 20Hz to 20kHz. If the frequency response range of the speaker is small, the speaker cannot process and play signals lower or higher than this range, and the reproduced sound will sound very narrow and lack expressiveness. Therefore, in theory, the frequency range should be as wide as possible.
[0003] General civilian headphones are generally divided into low-frequency, medium-frequency and high-frequency headphones. The low-frequency range is 30-150Hz, the medium-frequency range is 150-500Hz and 500-5KHz, and the high-frequency range is 5K-16KHz. Although civilian headphones can play high-frequency audio, it is difficult to achieve high-fidelity and accurate adjustment of sound pressure in each frequency band. There are two main reasons: First, for high-frequency problems, most existing speakers use a cover with a hollow open structure, which cannot control the damping force of vibration, and thus it is difficult to improve the accuracy of adjustment; second, for low-frequency problems, because the magnet in the headset is too short, the current magnet height is only 1cm, which causes insufficient movement distance of the coil and cannot truly play low-frequency sounds. Summary of the invention
[0004] In order to solve the problems existing in the above-mentioned prior art, one of the purposes of the present invention is to provide a speaker capable of improving the accuracy of sound pressure. The speaker of the present invention forms a relatively sealed space between the sealing shell and the paper cone, and then the internal air pressure and the elasticity relative to the paper cone can be controlled by the thickness of the gasket on the tuning hole, so as to achieve more accurate adjustment of the sound pressure, allowing people to adjust the sound intensity according to actual needs. The second purpose of the present invention is to provide headphones capable of improving the accuracy of sound pressure. The headphones of the present invention use the above-mentioned speakers, and fix the easily detachable speakers into the headphones to provide effective protection for the speakers. The third purpose of the present invention is to provide a sound pressure adjustment method capable of improving the accuracy of sound pressure. The method of the present invention is adjusted for the above-mentioned speakers, and the sound pressure adjustment is achieved by using the thickness of the gasket at the tuning hole, so that speakers with different configurations can be adapted and used for headphones classified as bass, midrange and treble.
[0005] The speaker capable of improving the accuracy of sound pressure of the present invention comprises a base and a cover body connected to the base, wherein a permanent magnet is fixedly arranged in the base, an iron core is sleeved in the middle of the base and the cover body, so that the iron core can reciprocate up and down relative to the permanent magnet, a coil is wound around the iron core, a through hole is opened on one side of the connection between the base and the cover body, and a wire connector of the coil extends outward from the through hole;
[0006] The speaker also includes a funnel-shaped sealing shell and a paper cone, the end of the sealing shell is adapted to the cover body, a movable part is sleeved in the middle of the sealing shell, one end of the movable part is connected to the paper cone, and the other end of the movable part is connected to the iron core, a sealed space is formed between the sealing shell and the paper cone, a tuning hole is opened on the inclined surface of the sealing shell, and the tuning hole is covered with a gasket on one side.
[0007] In one of the embodiments, there are two tuning holes, and the two tuning holes have different diameters and are used for coarse tuning and fine tuning. The gasket is generally made of wool.
[0008] In one embodiment, the length of the permanent magnet is at least 25 mm.
[0009] In one of the embodiments, the cover is embedded on the base by screws, and the cover is stepped and detachably connected to the end of the sealing shell.
[0010] In one embodiment, the movable part is made of iron material, and an arc surface is formed at one end of the movable part close to the iron core and is adapted to the iron core. The diameter of the movable part gradually increases from one end close to the iron core to the other end, and the movable range of the edge of the connection between the movable part and the iron core does not exceed the thickness of the cover body.
[0011] In one of the embodiments, a curved limiting piece is provided at the edge of the sealing shell and is matched with the edge of the paper cone.
[0012] In one embodiment, the permanent magnet is in a ring shape, and a support portion is provided on the inner side surface of the base for supporting the outer side of the permanent magnet.
[0013] In one of the embodiments, a limiting portion is provided at the inner bottom of the base, the limiting portion is used to separate the permanent magnet and the iron core and is sleeved with the iron core, and a buffer pad is also provided at the bottom of the limiting portion.
[0014] The earphone capable of improving the accuracy of sound pressure of the present invention comprises the above-mentioned speaker capable of improving the accuracy of sound pressure, and also comprises a shell and a soft cushion fixed on the shell and adapted to the human ear, the base and the sealing shell are embedded in the shell, and the soft cushion is wrapped from the edge of the sealing shell to the cover body.
[0015] The sound pressure adjustment method capable of improving the accuracy of sound pressure of the present invention adjusts the above-mentioned speaker capable of improving the accuracy of sound pressure, including: inputting a suitable fixed frequency into the speaker, changing the sound pressure by adjusting the thickness of the gasket, and measuring data with a sound pressure tester.
[0016] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:
[0017] 1. The speaker of the present invention forms a relatively sealed space between the speaker mouth and the paper plate, and the internal air pressure and the elasticity relative to the paper plate can be controlled by the thickness of the gasket on the tuning hole, so that more precise adjustment of the sound pressure can be achieved, allowing people to adjust the sound intensity according to actual needs.
[0018] 2. The present invention also increases the length of the magnet, so that the coil is accurately stressed and its movement distance is increased, which can further achieve more precise adjustment of the sound pressure and make the adjustable sound pressure cover a larger range.
[0019] 3. The earphone of the present invention uses the above-mentioned speaker, and fixes the easily detachable speaker into the earphone, thereby providing effective protection for the speaker.
[0020] 4. The method of the present invention adjusts the above-mentioned speakers, and uses the thickness of the gaskets at the large and small tuning holes to achieve coarse and fine adjustments of the sound pressure, so that speakers with different configurations can be adapted and used for headphones classified as bass, mid-range and treble. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the structure of a loudspeaker capable of improving the accuracy of sound pressure of the present invention;
[0022] Figure 2 is a cross-sectional view of one cross section of a loudspeaker capable of improving sound pressure accuracy according to the present invention;
[0023] Figure 3 is a cross-sectional view of another cross section of the speaker capable of improving the accuracy of sound pressure of the present invention;
[0024] Figure 4 The invention is a schematic structural diagram of an earphone capable of improving the accuracy of sound pressure.
[0025] Explanation of the reference numerals: 1-base, 2-cover, 3-permanent magnet, 4-iron core, 5-through hole, 6-sealing shell, 7-paper cone, 8-movable part, 9-tuning hole, 10-gasket, 11-support part, 12-limiting part, 13-buffer pad, 14-housing, 15-cushion. DETAILED DESCRIPTION
[0026] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.
[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be said that the internal connection of two components is connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The technical solution of the present invention is further explained below in conjunction with the accompanying drawings and embodiments.
[0028] like Figure 1-Figure 3 As shown, the speaker capable of improving the accuracy of sound pressure of the present invention comprises a base 1 and a cover body 2 adapted to the base 1, a permanent magnet 3 is fixedly arranged in the base 1, an iron core 4 is sleeved in the middle of the base 1 and the cover body 2, so that the iron core 4 can reciprocate up and down relative to the permanent magnet 3, a coil is wound on the iron core 4, a through hole 5 is opened on one side of the connection between the base 1 and the cover body 2, and a wire connector of the coil extends outward from the through hole 5;
[0029] The speaker also includes a funnel-shaped sealing shell 6 and a paper cone 7. The end of the sealing shell 6 is adapted to the cover body 2. A movable part 8 is sleeved in the middle of the sealing shell 6. One end of the movable part 8 is connected to the paper cone 7, and the other end of the movable part 8 is connected to the iron core 4. A sealed space is formed between the sealing shell 6 and the paper cone 7. A tuning hole 9 is opened on the inclined surface of the sealing shell 6, and a gasket 10 is covered on the side of the tuning hole 9 close to the base 1.
[0030] Although the existing headphone speakers can listen to audio frequencies of 20Hz to 20kHz, the sound pressure control and adjustment are obviously insufficient. The sound intensity required by the human ear cannot be adjusted more accurately. Usually, when the volume is turned down, the sound feels too small, and when the volume is turned up, it feels too large. This is primarily because the hollow design of the sealing shell 6 causes the energy loss of the paper cone 7 to be too large when it moves, and it is impossible to further accurately adjust the sound pressure to change the intensity of the sound. The speaker of the present invention forms a closed space by using the sealing shell 6 and the paper cone 7, and reserves two large and small tuning holes 9 and seals them with a gasket 10, thereby controlling the sound pressure formed when the paper cone 7 vibrates. Then, by adjusting the thickness of the gasket 10 of the large and small tuning holes, the air pressure of the sealed space can be adjusted, and the sound pressure range of the speaker can be pre-adjusted during production to form a corresponding bass, midrange or tweeter.
[0031] The diameters of the two tuning holes 9 are different, and the gasket 10 is generally made of wool. The diameters of the two tuning holes 9 can be selected to be 1-2 mm and 2-3 mm respectively. The larger tuning hole 9 is used for coarse adjustment of the sound pressure, and the smaller tuning hole 9 is used for fine adjustment of the sound pressure, which is mainly adjusted by the thickness of the wool gasket 10. Wool has good air permeability, and changing the thickness of the gasket 10 can easily adjust the change of sound pressure. At the same time, wool can absorb moisture in the air to prevent excessive dryness or humidity from affecting its function.
[0032] Furthermore, the length of the permanent magnet 3 is at least 25 mm. Another main reason for the lack of precision in sound pressure control and regulation in existing speakers is the insufficient length of the permanent magnet 3, which will cause insufficient displacement of the coil and fail to play low-frequency sounds. The speaker of the present invention increases the length of the permanent magnet 3 from the original 1 cm to more than 25 mm, which is more than 20 mm longer than most existing speakers, thereby increasing the distance of movement between the iron core 4 wound by the coil and the permanent magnet 3, and being able to play low-frequency sounds. When adjusting the sound strength, the audio frequency is changed, and the sound pressure can be more accurately fed back due to the magnetic field of the permanent magnet 3 because of the vibration frequency and its range, which can make the sound pressure more accurately regulated in the local regulation. The range is wider, allowing people to adjust the sound strength more appropriately according to actual needs.
[0033] In one embodiment, the cover 2 is embedded and mounted on the base 1 by screws, and the cover 2 is stepped and detachably connected to the end of the sealing shell 6. The cover 2 is a connecting part of the base 1 and the sealing shell 6, and is detachably connected to the base 1 by screws, and can cooperate with the sealing shell 6, so that the entire speaker structure is easy to disassemble and install, and some parts can be replaced separately during maintenance.
[0034] In one embodiment, the movable part 8 is made of iron material, and the end of the movable part 8 close to the iron core 4 forms an arc surface and matches the iron core 4. The diameter of the movable part 8 gradually increases from the end close to the iron core 4 to the other end, and the movable range of the edge of the connection between the movable part 8 and the iron core 4 does not exceed the thickness of the cover body 2. When the speaker is started and the coil receiving frequency is energized, the iron core 4 forms an electromagnet to absorb the movable part 8, and because of the change in current, the electromagnet is subjected to the force of the permanent magnet 3 to make regular reciprocating motion, so that the movable part 8 drives the paper cone 7 to move and make sound. The shape of the movable part 8 is easy to be stably connected with the iron core 4, and the change in its diameter prevents the movable part 8 from detaching from the sealing shell 6 during the movement and damaging the paper cone 7. At the same time, the movable part 8 and the iron core 4 are limited by the cover body 2 and can only reciprocate back and forth within the thickness range, avoiding the displacement of the movable part 8 and the iron core 4 causing damage to the speaker. In addition, a curved limit piece is provided at the edge of the sealing shell 6 and matches the edge of the paper cone 7. The limiting piece limits the paper cone 7 to be buckled on the sealing shell 6 so that the paper cone 7 will not move away from the sealing shell 6 .
[0035] Furthermore, the permanent magnet 3 is in the shape of a ring, and a support portion 11 is provided on the inner side of the base 1 and is used to support the outer side of the permanent magnet 3. The permanent magnet 3 needs to be fixed on the base 1, and due to the increase in the length of the permanent magnet 3, in order to maintain its stable installation, the support portion 11 on the inner side of the base 1 supports the annular permanent magnet 3 to position and install it. In addition, a limiting portion 12 is provided at the inner bottom of the base 2, and the limiting portion 12 is used to separate the permanent magnet 3 and the iron core 4 and to be sleeved with the iron core 4, and a buffer pad 13 is also provided at the bottom of the limiting portion 12. The limiting portion 12 is used to separate the permanent magnet 3 and the iron core 4 to prevent the iron core 4 from being attracted by the permanent magnet 3 and deflecting. At the same time, the limiting effect of the cover body 2 is cooperated so that the movement of the iron core 4 can only reciprocate in a straight line direction, and the fragile paper cone 7 will not be torn. Moreover, the buffer pad 13 at the bottom of the limiting portion 12 prevents the iron core 4 from being subjected to excessive force and hitting the base 1 to cause unnecessary wear.
[0036] like Figure 4 As shown, the present invention also provides an earphone capable of improving the accuracy of sound pressure, comprising the above-mentioned speaker capable of improving the accuracy of sound pressure, and also comprising a shell 14 and a soft pad 15 fixed on the shell 14 and adapted to the human ear, the base 1 and the sealing shell 6 are embedded in the shell 14, and the soft pad 15 is wrapped from the edge of the sealing shell 6 to the cover 2. The earphone of the present invention uses the above-mentioned speaker, and fixes the speaker that can be easily removed into the earphone, providing effective protection for the speaker. The bottom surface of the base 1 is against the inner side of the shell 14, and the edge of the sealing shell 6 is pressed on the base 1 by the wrapping elastic force of the soft pad 15, and the soft pad 15 completely wraps the sealing shell 6 to protect its side, and concentrates the sound in the soft pad 15, thereby improving the sound effect.
[0037] The present invention also provides a sound pressure adjustment method that can improve the accuracy of sound pressure, and adjusts the above-mentioned speaker that can improve the accuracy of sound pressure, including: inputting a suitable fixed frequency into the speaker, changing the sound pressure by adjusting the thickness of the gasket 10, and measuring data by a sound pressure tester. The method of the present invention adjusts the above-mentioned speaker, and uses the thickness of the gasket 10 at the tuning hole 9 to achieve sound pressure adjustment. Since a sealed state is formed between the paper cone 7 and the sealing shell 6, the thicker the gasket 10, the greater the air pressure formed, and the easier it is for the sound pressure to increase, so that it can use gaskets 10 with different configurations, that is, different thicknesses to change the sensitivity of the speaker to sound pressure changes, and then can be adapted and used for headphones classified as bass, midrange and treble. In addition, when adjusting, it can be roughly adjusted to a suitable sound pressure range through the larger tuning hole 9, and then fine-tuned by the smaller tuning hole 9.
[0038] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application.
[0039] In the figure, the description of the positional relationship is only for illustrative purposes and should not be understood as a limitation on this patent; obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the claims of the present invention.
Claims
1. A speaker capable of improving the accuracy of sound pressure, characterized in that: The invention comprises a base (1) and a cover (2) connected to the base (1), wherein a permanent magnet (3) is fixedly arranged in the base (1), an iron core (4) is sleeved between the middle of the base (1) and the cover (2), so that the iron core (4) can reciprocate up and down relative to the permanent magnet (3), a coil is wound around the iron core (4), a through hole (5) is formed on one side of the connection between the base (1) and the cover (2), and a wire connector of the coil extends outward from the through hole (5); The speaker further comprises a funnel-shaped sealing shell (6) and a paper cone (7), the end of the sealing shell (6) being matched with the cover body (2), a movable part (8) being sleeved in the middle of the sealing shell (6), one end of the movable part (8) being connected to the paper cone (7), and the other end of the movable part (8) being connected to the iron core (4), a sealed space being formed between the sealing shell (6) and the paper cone (7), a tuning hole (9) being provided on the inclined surface of the sealing shell (6), and the tuning hole (9) being covered with a gasket (10) on one side of (1).
2. The speaker capable of improving sound pressure accuracy according to claim 1, characterized in that: There are two tuning holes (9), and the two tuning holes (9) have different diameters and are used for coarse tuning and fine tuning. The gasket (10) is generally made of wool.
3. The speaker capable of improving sound pressure accuracy according to claim 2, characterized in that: The length of the permanent magnet (3) is at least 25 mm.
4. The speaker capable of improving sound pressure accuracy according to claim 3, characterized in that: The cover body (2) is embedded and mounted on the base (1) by means of screws; the cover body (2) is stepped and detachably connected to the end of the sealing shell (6).
5. The speaker capable of improving sound pressure accuracy according to claim 4, characterized in that: The movable part (8) is made of iron material. The end of the movable part (8) close to the iron core (4) forms an arc surface and is adapted to the iron core (4). The diameter of the movable part (8) gradually increases from the end close to the iron core (4) to the other end. The movable range of the edge of the connection between the movable part (8) and the iron core (4) does not exceed the thickness of the cover body (2).
6. The speaker capable of improving sound pressure accuracy according to claim 5, characterized in that: A curved limiting piece is provided at the edge of the sealing shell (6) and is matched with the edge of the paper cone (7).
7. The speaker capable of improving sound pressure accuracy according to claim 6, characterized in that: The permanent magnet (3) is in the shape of a circular ring, and a support portion (11) is provided on the inner side surface of the base (1) and is used to support the outer side of the permanent magnet (3).
8. The speaker capable of improving sound pressure accuracy according to claim 7, characterized in that: A limiting portion (12) is provided at the inner bottom of the base (2), the limiting portion (12) being used to separate the permanent magnet (3) and the iron core (4) and being sleeved with the iron core (4), and a buffer pad (13) is also provided at the bottom of the limiting portion (12).
9. An earphone capable of improving the accuracy of sound pressure, characterized in that: A speaker capable of improving the accuracy of sound pressure as claimed in any one of claims 1 to 8, further comprising a shell (14) and a soft pad (15) fixed to the shell (14) and adapted to the human ear, wherein the base (1) and the sealing shell (6) are embedded in the shell (14), and the soft pad (15) is wrapped from the edge of the sealing shell (6) to the cover (2).
10. A sound pressure adjustment method capable of improving sound pressure accuracy, characterized in that: Adjusting the speaker capable of improving the accuracy of sound pressure as described in any one of claims 1 to 8 comprises: inputting a suitable fixed frequency into the speaker, changing the sound pressure by adjusting the thickness of the gasket (10), and measuring data with a sound pressure tester.