Loudspeaker and earphone capable of improving sound pressure accuracy

Abstract

The utility model relates to a loudspeaker and an earphone capable of improving sound pressure accuracy. The loudspeaker comprises a base and a sealing shell connected with the base, a permanent magnet is fixedly arranged in the base, an iron core sleeves the middle parts of the base and the cover body, and a coil is wound on the iron core, so that the coil can reciprocate up and down relative to the permanent magnet; the loudspeaker further comprises a funnel-shaped sealing shell and a cone, a sealing space is formed between the sealing shell and the cone, a tone tuning hole is formed in the inclined face of the sealing shell, and the tone tuning hole is covered with a gasket in the sealing shell. According to the loudspeaker provided by the utility model, the relatively closed space is formed between the sealing shell and the cone, and the air pressure in the closed space and the vibration amplitude of the cone can be controlled through the thickness of the gasket on the tuning hole, so that the sound pressure can be adjusted more accurately. The loudspeaker is applied to the earphone, so that the loudspeaker is effectively protected. According to the method of the utility model, the horns are adjusted, so that the horns with different configurations can be matched and used for earphones with bass, alto, treble and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of speaker structures, in particular to a speaker and earphone capable of improving sound pressure accuracy. Background Art

[0002] The human ear can hear frequencies between 20Hz and 20kHz. If a speaker's frequency response is narrow, it won't be able to process or play signals below or above this range, resulting in a narrow, lacking quality. Therefore, ideally, a wider frequency range is best.

[0003] General civilian headphones are generally divided into low-frequency, mid-frequency and high-frequency headphones. The low-frequency range is 30-150Hz, the mid-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 sound in each frequency band and accurate adjustment of sound pressure. 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 earphone is too short, the current magnet height is only 1cm, resulting in insufficient movement distance of the coil, which cannot truly play low-frequency sounds. Utility Model Content

[0004] To address the aforementioned problems with the prior art, one objective of the present invention is to provide a speaker capable of improving sound pressure accuracy. The speaker of the present invention forms a relatively sealed space between the sealed shell and the paper cone. The thickness of the gasket on the tuning hole can be used to control the internal air pressure and the elasticity relative to the paper cone, thereby achieving more precise adjustment of the sound pressure, allowing people to adjust the sound intensity according to actual needs. A second objective of the present invention is to provide headphones capable of improving sound pressure accuracy. The headphones of the present invention utilize the aforementioned speaker and secure the easily detachable speaker to the headphones, providing effective protection for the speaker.

[0005] The speaker capable of improving sound pressure accuracy described in the present invention comprises a base and a cover connected to the base, wherein a permanent magnet is fixedly disposed in the base, an iron core is sleeved between the base and the middle portion of the cover 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 formed on one side of the connection between the base and the cover, 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 on 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 embodiment, there are two tuning holes, and the diameters of the two tuning holes are different, which are used for coarse tuning and fine tuning, and 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 embodiment, the cover is embedded in 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 embodiment, a curved limiting piece is provided at the edge of the sealing shell and is adapted to 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 embodiment, 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 further provided at the bottom of the limiting portion.

[0014] The earphones capable of improving sound pressure accuracy of the present invention include the above-mentioned speaker capable of improving sound pressure accuracy, and also include a shell and a soft cushion fixed on the shell and adapted to the human ear. The base and the sealed shell are embedded in the shell, and the soft cushion is wrapped from the edge of the sealed shell to the cover.

[0015] Compared with the prior art, the beneficial effects of the technical solution of the utility model are:

[0016] 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, thereby achieving more precise adjustment of the sound pressure, allowing people to adjust the sound intensity according to actual needs.

[0017] 2. The utility model 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 expand the range of adjustable sound pressure.

[0018] 3. The earphones of the present invention use the above-mentioned speakers, and fix the easily detachable speakers into the earphones, thereby providing effective protection for the speakers.

[0019] 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

[0020] Figure 1 This is a schematic diagram of the structure of a loudspeaker capable of improving sound pressure accuracy according to the utility model;

[0021] Figure 2 It is a cross-sectional view of one cross section of the loudspeaker capable of improving the accuracy of sound pressure according to the utility model;

[0022] Figure 3 It is a cross-sectional view of another cross section of the loudspeaker capable of improving the accuracy of sound pressure according to the present invention;

[0023] Figure 4 The utility model is a structural schematic diagram of an earphone capable of improving the accuracy of sound pressure.

[0024] Explanation of the accompanying numbers: 1-base, 2-cover, 3-permanent magnet, 4-iron core, 5-through hole, 6-sealed 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

[0025] The accompanying drawings are for illustrative purposes only and are not to be construed as limitations on this patent. To better illustrate this embodiment, some components of the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the actual dimensions of the product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted from the accompanying drawings.

[0026] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installation" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, which can be considered as internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model. The technical solution of this utility model is further described below with reference to the accompanying drawings and embodiments.

[0027] like Figure 1-Figure 3 As shown, the speaker of the present invention capable of improving sound pressure accuracy includes a base 1 and a cover 2 adapted to the base 1. A permanent magnet 3 is fixedly disposed in the base 1. An iron core 4 is sleeved between 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 for the coil extends outward from the through hole 5.

[0028] 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 the tuning hole 9 is covered with a gasket 10 on the side close to the base 1.

[0029] Although existing headphone speakers can receive audio frequencies of 20Hz to 20kHz, their 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 loud. This is primarily because the hollow design of the sealing shell 6 causes the paper cone 7 to lose too much energy when it moves, making it impossible to further accurately adjust the sound pressure to change the intensity of the sound. The speaker of the present invention forms a sealed 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 generated 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 in the sealed space can be adjusted. The sound pressure range of the speaker can be pre-adjusted during production to form a corresponding bass, mid-range or tweeter.

[0030] The two tuning holes 9 have different diameters, and the gasket 10 is typically 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 sound pressure adjustment, while the smaller tuning hole 9 is used for fine sound pressure adjustment. Adjustment is primarily achieved through the thickness of the wool gasket 10. Wool is breathable, making it easy to adjust sound pressure by changing the thickness of the gasket 10. Wool also absorbs moisture from the air, preventing excessive dryness or humidity from affecting its function.

[0031] Furthermore, the length of the permanent magnet 3 is at least 25 mm. Another major reason for the lack of sound pressure control and adjustment accuracy in existing speakers is the insufficient length of the permanent magnet 3, which results in insufficient coil displacement and an inability to play low-frequency sounds. The speaker of the utility model 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. This increases the distance between the iron core 4 around which the coil is wound and the permanent magnet 3, making it more capable of playing low-frequency sounds. When adjusting the sound intensity, the audio frequency is changed, and the sound pressure is more accurately fed back due to the magnetic field of the permanent magnet 3 because the vibration frequency and its range can be more accurately reflected. This allows for a wider range of precise local adjustment of the sound pressure, allowing people to adjust the sound intensity more appropriately according to actual needs.

[0032] In one embodiment, cover 2 is embedded and screwed onto base 1. Cover 2 has a stepped shape and is removably connected to the end of sealed housing 6. Cover 2 serves as the connecting component between base 1 and sealed housing 6. It is removably connected to base 1 via screws and can be mated with sealed housing 6, making the entire speaker structure easy to disassemble and install, and allowing individual parts to be replaced during maintenance.

[0033] In one embodiment, the movable member 8 is made of iron. The end of the movable member 8 near the core 4 forms a curved surface that fits snugly with the core 4. The diameter of the movable member 8 gradually increases from one end near the core 4 to the other. The range of motion of the edge of the connection between the movable member 8 and the core 4 does not exceed the thickness of the cover 2. When the speaker is powered on and the coil receives power at the receiving frequency, the core 4 forms an electromagnet that attracts the movable member 8. The changing current causes the electromagnet to undergo regular reciprocating motion under the force of the permanent magnet 3, thereby causing the movable member 8 to move the paper cone 7 and produce sound. The shape of the movable member 8 facilitates a stable connection with the core 4, and its varying diameter prevents the movable member 8 from separating from the sealing shell 6 during movement and damaging the paper cone 7. Furthermore, the movable member 8 and the core 4 are restricted by the cover 2 to reciprocate back and forth within the thickness of the cover 2, preventing damage to the speaker caused by displacement of the movable member 8 and the core 4. Furthermore, a curved stopper is provided at the edge of the sealing shell 6 to fit snugly with the edge of the paper cone 7. The limiting piece restricts the paper cone 7 from being buckled onto the sealing shell 6 , so that the paper cone 7 will not move away from the sealing shell 6 .

[0034] Furthermore, the permanent magnet 3 is annular, and a support portion 11 is provided on the inner side of the base 1 to support the outer side of the permanent magnet 3. The permanent magnet 3 needs to be fixed to the base 1. Due to the increased length of the permanent magnet 3, 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 it for installation. Furthermore, a stopper 12 is provided on the inner bottom of the base 2. This stopper 12 is used to separate the permanent magnet 3 and the iron core 4 and is interlocked with the iron core 4. A cushion 13 is also provided at the bottom of the stopper 12. The stopper 12 separates the permanent magnet 3 and the iron core 4, preventing the iron core 4 from being attracted by the permanent magnet 3 and deflecting. Simultaneously, the stopper 12, in conjunction with the limiting function of the cover 2, restricts the iron core 4 to a linear reciprocating motion, preventing damage to the fragile paper cone 7. Furthermore, the cushion 13 at the bottom of the stopper 12 prevents the iron core 4 from being subjected to excessive force and colliding with the base 1, causing unnecessary wear.

[0035] like Figure 4 As shown, the present invention also provides headphones that can improve the accuracy of sound pressure, including the above-mentioned speaker that can improve the accuracy of sound pressure, and also including 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 headphones of the present invention use the above-mentioned speaker and fix the easily detachable speaker into the headphones to provide 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 against the base 1 by the wrapping elastic force of the soft pad 15, and the soft pad 15 completely wraps the sealing shell 6, forming protection for its side and concentrating the sound in the soft pad 15, thereby improving the sound effect.

[0036] The present invention also provides a sound pressure adjustment method capable of improving sound pressure accuracy. The method comprises: inputting a suitable fixed frequency into the speaker, varying the sound pressure by adjusting the thickness of the gasket 10, and measuring the data using a sound pressure tester. The method of the present invention adjusts the above-mentioned speaker by adjusting the thickness of the gasket 10 at the tuning hole 9 to achieve sound pressure adjustment. Since the paper cone 7 and the sealing shell 6 form a seal, the thicker the gasket 10, the greater the air pressure generated, and the more easily the sound pressure increases. This allows the speaker's sensitivity to sound pressure changes to be varied by using gaskets 10 of different configurations, i.e., different thicknesses, and thus can be adapted for and used with headphones classified as bass, midrange, and treble. Furthermore, during adjustment, the larger tuning hole 9 can be used to roughly adjust the sound pressure to the appropriate range, and then the smaller tuning hole 9 can be used for fine-tuning.

[0037] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they cannot be understood as limiting the scope of protection of this application.

[0038] In the figure, the positional relationship is described only for illustrative purposes and should not be understood as a limitation on this patent. Obviously, the above embodiments of the present invention are merely 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 sound pressure accuracy, 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 provided 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 provided 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 adapted to 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 the side close to the base (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 diameters of the two tuning holes (9) are different, and the tuning holes (9) are used for coarse tuning and fine tuning. The gasket (10) is 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 (2) is embedded and mounted on the base (1) by means of screws; the cover (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 movable part (8) forms an arc surface at one end close to the iron core (4) and is adapted to the iron core (4). The diameter of the movable part (8) gradually increases from one 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 adapted to 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 a circular ring shape, 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 (1), 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 sound pressure accuracy, characterized in that: The speaker capable of improving the accuracy of sound pressure comprises the speaker according to any one of claims 1 to 8, and further comprises a shell (14) and a soft cushion (15) fixed on 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 cushion (15) is wrapped from the edge of the sealing shell (6) to the cover (2).

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