Low-frequency compression portable loudspeaker box

Abstract

The utility model provides a low-frequency compression portable sound box, which comprises a box body, a mounting groove arranged in the center of the box body, a top cover arranged above the mounting groove, a cavity formed between the mounting groove and the top cover, a low-frequency horn arranged in the cavity and penetrating through the top cover, a sound guide channel arranged on one side of the cavity, and a sound guide plate arranged on the other side of the cavity. A sound inlet is formed in the side, close to the cavity, of the sound guide channel, a sound outlet channel is formed in the inner wall of the side, close to the box body, of the sound guide channel, a sound outlet corresponding to the sound outlet channel is formed in the top cover, a baffle is arranged in the sound guide channel, and one end of the baffle is connected with the inner wall, close to the sound inlet, of the box body. The other end of the baffle extends towards the other end of the box body; the box body is simple in structure, thereby being convenient to carry and use.

Description

Technical Field

[0001] This utility model relates to the field of speaker technology, specifically to a low-frequency compression portable speaker. Background Technology

[0002] A speaker is a device that converts electrical signals into sound signals. It is an extremely important component of an audio system. It uses a built-in power amplifier to amplify the audio signal and then reproduce the sound through the speaker itself, making the sound louder.

[0003] In a speaker, the size of the spider and voice coil is crucial to the bass performance. When an electric current passes through the voice coil, the magnetic field it generates interacts with the fixed magnetic field formed by the permanent magnet inside the speaker, causing the voice coil to move along the axis of the spider, thereby driving the diaphragm to vibrate and thus producing sound.

[0004] For example, patent document with patent application number 202320766862.X and publication date of December 12, 2023 discloses a small-volume loudspeaker with a large voice coil, including a housing, a U-shaped iron at the center of the bottom of the housing, a gasket at the bottom of the inner side of the U-shaped iron, a magnet at the top of the gasket, a washer at the top of the magnet, and a circular rectangular voice coil at the top of the washer. This small-volume loudspeaker with a large voice coil internally equips the speaker with a circular rectangular voice coil. Compared to existing circular voice coils, this can expand the circumference of the voice coil by extending its side, achieving an equivalent effect to existing large-diameter circular voice coils. This allows for high power output, improved resonant frequency parameters, a smaller resonant frequency parameter value, and improved low-frequency extension, fullness, and elasticity. Simultaneously, by utilizing the physical motion performance of a wave-centering frame, it can effectively control the second and third harmonic distortion of the speaker cone vibration, which is beneficial for high power output while reducing the speaker's nonlinear distortion.

[0005] The above literature describes assembling a circular rectangular voice coil inside the loudspeaker. By extending the side of the circular rectangular voice coil, the circumference of the voice coil can be increased, thereby achieving high power output. However, the lengths of the circular side and the curved edge are different, resulting in different magnetic field strengths within the circular side and the curved edge. This causes the rectangular voice coil to encounter the problem of magnetic field inhomogeneity. When the voice coil is energized, the magnetic field it generates interacts with the magnetic field on the U-shaped iron, and the side and curved edge of the voice coil may jump asynchronously, thus affecting the linearity of the voice coil's movement. Furthermore, the voice coil is connected to a spider, which is located around the magnet, making it impossible to ensure the consistency of the spider's movement, thereby affecting the sound quality.

[0006] To improve sound quality, existing speakers usually have to be made larger, which makes them less portable. To make them more portable, they usually have to retain basic sound output functions, reducing the size of the speaker to achieve portability. However, this can easily lead to unclear sound output. Summary of the Invention

[0007] This invention provides a low-frequency compression portable speaker with good consistency of the ballistic motion, good sound quality, and a simple cabinet structure, making it easy to carry and use.

[0008] To achieve the above objectives, this utility model provides a low-frequency compression portable speaker, including a cabinet, a mounting groove in the center of the cabinet, a top cover above the mounting groove, a cavity between the mounting groove and the top cover, a low-frequency speaker installed in the cavity, the low-frequency speaker passing through the top cover, a sound guide channel on one side of the cavity, a baffle in the sound guide channel, one end of the baffle being connected to the inner wall of the cabinet near the sound inlet, and the other end of the baffle extending to the other end of the cabinet.

[0009] The low-frequency speaker includes a frame, on which a U-shaped iron is mounted. A magnet is mounted on the U-shaped iron, and a washer is mounted on the magnet. A cavity is provided between the U-shaped iron and the side of the washer, and a voice coil is disposed within the cavity. The upper end of the voice coil is connected to the bottom of the dust cap. A receiving groove is provided above the washer, and the receiving groove is provided with a spring and a limiting post. The middle part of the spring is connected to the middle part of the dust cap through the limiting post.

[0010] The above setup, by providing a mounting slot on the top of the enclosure and placing the low-frequency speaker within it, prevents the overall size of the speaker from becoming excessively large. Furthermore, the top cover on the mounting slot creates a cavity between it and the mounting slot. Thus, the sound emitted from the front of the low-frequency speaker is normally output from the top of the speaker, while the sound emitted from the back of the low-frequency speaker is mixed within the cavity. This mixed sound is then transmitted to the outside of the speaker through a sound guide channel. Because a baffle is placed within the sound guide channel, the sound is blocked during transmission, altering the transmission path and lengthening the transmission time. This ensures further mixing of the sound within the sound guide channel, thereby increasing the output sound and improving the speaker's clarity.

[0011] Meanwhile, by setting up a low-frequency speaker, a magnetic field is formed between the voice coil and the magnet, causing the spider and dust cap to move upward or downward together to produce sound. Since the spider is fixed in the receiving groove and fixed to the dust cap by the limiting post, it can better drive the spider to move evenly, resulting in good sound quality. At the same time, because the spider is set on the magnet, there is more space on the outside of the magnet to accommodate a larger voice coil. The larger cross-section of the voice coil can form a larger magnetic field, which can generate a stronger driving force under the same current, allowing the cone to vibrate over a wider range. This helps to provide a stronger driving force at low frequencies, more effectively pushing more air, and thus providing a lower frequency response. A lower low-frequency response is beneficial for creating a sense of immersion in the sound, improving the fidelity and clarity of the audio signal, and thus helping to obtain a lower frequency limit.

[0012] Furthermore, the sound guide channel has a sound inlet on the side near the cavity, a sound outlet channel is formed on the inner wall of the sound guide channel near the cabinet, and a sound outlet corresponding to the sound outlet channel is provided on the top cover.

[0013] The above settings, by providing an inlet and an outlet, facilitate the output of sound from inside the cavity to the outside of the speaker through the sound guide channel.

[0014] Furthermore, a second baffle is provided on the side of the sound guide channel near the cabinet. One end of the second baffle is connected to the inner wall of the other end of the cabinet, and the other end of the second baffle extends towards the end of the cabinet near the sound inlet, forming a sound outlet channel between the second baffle and the interior of one side of the cabinet.

[0015] The above settings, by adding a second baffle, make the sound transmission path and transmission time longer, thereby further increasing the sound mixing time and improving clarity.

[0016] Furthermore, one or more mounting posts are provided inside the cavity, and the low-frequency speaker is mounted on the mounting posts by screws.

[0017] The above settings, by setting up mounting posts, make it convenient to install the low-frequency speaker in different positions in the mounting slot according to actual needs.

[0018] Furthermore, the basin frame is also equipped with a speaker cone, one end of which is connected to the basin frame and the other end of which is connected to a dust cap.

[0019] The above setup, where the dust cap is connected to the cone (i.e., the voice coil, dust cap, and cone are connected), helps to enhance the stability of the speaker structure, reduces deformation during vibration, and thus maintains the stability of the sound output.

[0020] Furthermore, the top of the enclosure has an openable outer shell with a display screen. The enclosure has a receiving cavity for accommodating a microphone on one side near the connection point of the outer shell. A protrusion is provided on the side of the receiving cavity near the outer wall of the enclosure, and the protrusion extends to the other side of the receiving cavity. The handheld part of the microphone is positioned between the protrusion and the other side of the receiving cavity.

[0021] The above configuration features an openable outer shell on the housing, with a display screen on the shell. A microphone housing is located on one side of the housing, allowing the microphone to be stored on one side. The outer shell can be closed for easy carrying. When the display screen is needed, it can be opened and the microphone taken out to perform a song request. The protruding part can be used to hold the microphone in place, preventing it from shaking during transport.

[0022] Furthermore, a mounting surface is provided at the top of the protrusion, and a mounting hole is provided on the mounting surface. The fixed end of the hinge is connected to the mounting hole by a screw, and the movable end of the hinge is connected to the outer shell.

[0023] The above configuration, by providing a mounting surface on the protrusion, allows for the installation of the hinge, saving space, and also allows the protrusion to limit the movement of the microphone.

[0024] Furthermore, the wave is arched upwards to form a convex frustum structure, and a perforation is provided in the middle of the wave.

[0025] The above settings include a perforation in the middle of the wave spring, which allows the limiting post to connect with the wave spring. The limiting post ensures that the wave spring vibrates effectively and evenly during movement, avoiding excessive local vibration, thereby reducing the occurrence of segmented vibration, and making the wave spring less prone to deformation.

[0026] Furthermore, the limiting post includes an extension portion and a boss. The boss protrudes outward from the outer side wall of the extension portion. The extension portion passes through the through hole, and the lower surface of the boss is connected to the spring wave.

[0027] With the above configuration, the limiting post extends into the through hole, allowing the lower surface of the boss to connect with the spring. This ensures a more secure and stable connection between the spring and the limiting post. The limiting post provides a connection point for the spring and the dust cap, making the low-frequency speaker structure more compact and integrated. During the operation of the low-frequency speaker, the vibration generated by the voice coil is transmitted to the spring through the dust cap. The boss of the limiting post increases the contact surface between the limiting post and the spring, effectively dispersing the stress exerted on the spring by the dust cap, thus making the spring less prone to deformation and extending its service life.

[0028] Furthermore, the cross-sectional area of ​​the inner wall of the voice coil is greater than the cross-sectional area of ​​the spider wave.

[0029] With the above settings, among speakers of the same size, a voice coil with a larger cross-sectional area helps improve the low-frequency response of low-frequency speakers, making the sound fuller and more powerful. At the same time, a larger voice coil also helps reduce distortion and improve the clarity and fidelity of the sound quality. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of this utility model.

[0031] Figure 2 This is a simplified schematic diagram of the interior of the housing of this utility model.

[0032] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0033] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0034] Figure 5 This is a front view of the low-frequency speaker of this utility model.

[0035] Figure 6 This is the front view of the limiting post in this utility model.

[0036] Figure 7 This is an exploded view of the low-frequency speaker of this utility model.

[0037] Figure 8 This is a connection diagram of the low-frequency speaker of this utility model.

[0038] Figure 9 for Figure 8 Enlarged view of point C.

[0039] Figure 10 This is a top view of the spring wave in this utility model. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0041] Example 1.

[0042] like Figure 1-4As shown, a low-frequency compression portable speaker includes a cabinet 1, a mounting groove 11 at the center of the cabinet 1, a top cover 12 above the mounting groove 11, a cavity 13 between the mounting groove 11 and the top cover 12, a low-frequency speaker 2 installed in the cavity 13, the low-frequency speaker 2 passing through the top cover 12, a sound guide channel 3 on one side of the cavity 13, a sound inlet 31 on the side of the sound guide channel 3 near the cavity 13, a sound outlet channel 32 formed on the inner wall of the sound guide channel 3 near the cabinet 1, a sound outlet 30 corresponding to the sound outlet channel 32 on the top cover 12, a baffle 33 in the sound guide channel 3, one end of the baffle 33 connected to the inner wall of the cabinet 1 near the sound inlet 31, and the other end of the baffle 33 extending to the other end of the cabinet 1.

[0043] like Figure 2 As shown, one or more mounting posts 14 are provided within the cavity 13, and the low-frequency speaker 2 is mounted on the mounting posts 14 by screws (not shown in the figure). By providing mounting posts 14, it is convenient to install the low-frequency speaker 2 at different positions in the mounting slot 11 according to actual needs.

[0044] like Figure 1 As shown, a shell 4 is also provided on the housing 1, and the shell 4 is installed on the housing 1 by a hinge 41. The shell 4 is designed to cover the low-frequency speaker 2, thereby making it easy to carry.

[0045] A display 42 is provided on the outer casing 4. The display 42 is placed on the outer casing 4 so that it is easy to carry and does not affect its use.

[0046] A receiving cavity 15 for accommodating a microphone 151 is provided on the side of the housing 1 near the connection point with the outer shell 4. The receiving cavity 15 facilitates the storage of the microphone.

[0047] like Figure 4 As shown, a protrusion 16 is provided on the side of the receiving cavity 15 near the outer wall of the housing 1. The protrusion 16 extends to the other side of the receiving cavity 15, and the handheld part of the microphone 151 is secured between the protrusion 16 and the other side of the receiving cavity 15. The protrusion 16 secures the handheld part of the microphone 151, preventing the microphone 151 from shaking during carrying and transportation.

[0048] like Figure 1 and Figure 4 As shown, a mounting surface 17 is provided at the top of the protrusion 16, and a mounting hole 18 is provided on the mounting surface 17. The fixed end of the hinge 41 is connected to the mounting hole 18 by a screw (not shown in the figure), and the movable end of the hinge 41 is connected to the outer shell 4. By providing a mounting surface 17 on the protrusion 16, the hinge 41 can be installed, saving space, and the protrusion 16 can limit the position of the microphone 151.

[0049] like Figure 5-10 As shown, the low-frequency speaker 2 includes a frame 4Z, a U-shaped iron 5Z mounted on the frame 4Z, a magnet 6Z mounted on the U-shaped iron 5Z, a washer 7Z mounted on the magnet 6Z, a cavity 9Z between the U-shaped iron 5Z and the side of the washer 7Z, a receiving groove 71Z in the middle of the upper part of the washer 7Z, the receiving groove 71Z being recessed downward from the top of the washer 7Z, a spring 10Z disposed within the receiving groove 71Z, a limiting post 2Z including an extension part and a boss 21Z, the spring 10Z being connected to the lower surface of the boss 21Z, a voice coil 8Z disposed within the cavity 9Z, the voice coil 8Z bouncing within the cavity 9Z, and the upper end of the voice coil 8Z being connected to the anti-vibration device. The bottom of the dust cap 1Z is connected, and the middle part of the dust cap 1Z is connected to the upper surface of the boss 21Z. A washer 7Z is provided on the U-shaped iron 5Z. A magnet 6Z is provided between the U-shaped iron 5Z and the washer 7Z. The upper surface of the spring 10Z is connected to the lower surface of the boss 21Z. A voice coil 8Z is provided in the cavity 9Z. The voice coil 8Z can jump in the cavity 9Z. That is, the voice coil 8Z is sleeved on the outside of the washer 7Z and the magnet frame. The spring 10Z is set inside the washer 7Z. The voice coil 8Z is sleeved on the outside of the washer 7Z. The upper side of the voice coil 8Z is connected to one end of the dust cap 1Z. The other end of the dust cap 1Z is connected to the upper surface of the boss 21Z.

[0050] Because the spider 10Z is placed within the receiving cavity 71Z, there is no need to connect the voice coil 8Z to the spider 10Z, thus affecting the size of the voice coil 8Z. Using this structure in a speaker of the same size allows for a larger cross-sectional area of ​​the cavity 9Z, thereby increasing the cross-sectional area of ​​the voice coil 8Z. A larger voice coil 8Z can cover a larger magnetic field area, generating a stronger driving force under the same current. This allows the cone 3Z to vibrate over a wider range, contributing to stronger driving force at low frequencies and more effectively pushing more air, resulting in a lower frequency response. A lower low-frequency response is beneficial for creating a sense of immersion in the sound. Furthermore, the increased cross-sectional area of ​​the voice coil 8Z, i.e., the corresponding increase in the cross-sectional area of ​​the connection point between the voice coil 8Z and the dust cap 1Z or the cone 3Z, prevents deviation between the left and right sides of the cone 3Z during movement. This minimizes split vibration, improves the fidelity and clarity of the audio signal, and helps to achieve a lower frequency limit.

[0051] like Figure 6-9 As shown, a cone 3Z is also provided on the frame 4Z. One end of the cone 3Z is connected to the frame 4Z, and the other end of the cone 3Z is connected to the dust cap 1Z. The dust cap 1Z is connected to the cone 3Z. That is, the voice coil 8Z, the dust cap 1Z and the cone 3Z are connected, which helps to enhance the stability of the low-frequency speaker structure and help to reduce deformation during vibration, thereby maintaining the stability of the sound output.

[0052] The limiting post 2Z is ​​provided with an extension part 22Z, and the dust cap 1Z has a connecting hole 11Z in the middle. The extension part 22Z passes into the through hole 101Z, and the extension part 22Z of the limiting post 2Z passes into the through hole 101Z, so that the lower surface of the boss 21Z can connect with the spring 10Z. This ensures that the connection between the spring 10Z and the limiting post 2Z is ​​more firm and stable. The setting of the limiting post 2Z provides a connection position for the spring 10Z and the dust cap 1Z, making the low-frequency speaker structure more compact and integrated. During the operation of the speaker, the vibration generated by the voice coil 8Z will be transmitted to the spring 10Z through the dust cap 1Z. The boss on the limiting post 2Z effectively disperses the stress of the dust cap 1Z acting on the spring 10Z, thereby making the spring 10Z less prone to deformation and extending the service life of the spring 10Z.

[0053] The cross-sectional area of ​​the inner wall of the voice coil 8Z is larger than that of the spider 10Z, which allows the voice coil 8Z to be placed on the outside of the magnet 6Z. In speakers of the same size, the voice coil 8Z with a larger cross-sectional area helps to improve the low-frequency response of the low-frequency speaker, making the sound fuller and more powerful. At the same time, the larger voice coil 8Z also helps to reduce distortion and improve the clarity and fidelity of the sound quality.

[0054] The limiting post 2Z is ​​made of ABS material. The low-frequency speaker generates heat when it is working. ABS material has good heat resistance and can maintain stable performance in high-temperature environments.

[0055] like Figure 10 As shown, the spring 10Z arches upwards to form a convex frustum structure. A perforation 101Z is provided in the middle of the spring 10Z, which allows the lower surface of the protrusion 21Z of the limiting post 2Z to connect with the spring 10Z. The setting of the limiting post 2Z enables the spring 10Z to vibrate effectively and uniformly during the movement, avoiding excessive local vibration, thereby reducing the occurrence of segmented vibration, and making the spring 10Z less prone to deformation.

[0056] The working principle of this utility model is as follows: By setting a mounting groove 11 on the upper part of the enclosure 1 and placing the speaker 2 in the mounting groove 11, the overall size of the speaker enclosure 1 is not too large. Since a top cover 12 is set on the mounting groove 11, a cavity 13 is formed between the top cover 12 and the mounting groove 11. Therefore, the sound emitted from the front of the speaker 2 is normally output from the top of the speaker enclosure 1, while the sound emitted from the back of the speaker 2 is mixed in the cavity 13. The mixed sound is then transmitted to the outside of the speaker enclosure 1 through the sound guide channel 3. Because a baffle 33 is set in the sound guide channel 3, the sound is blocked by the baffle 33 during transmission within the sound guide channel 3. By changing the transmission path, the transmission time and path of the sound are lengthened, which ensures that the sound can be further mixed within the sound guide channel 3, thereby increasing the output sound and improving the clarity of the speaker 1. At the same time, an openable shell 4 is provided on the cabinet 1, and a display screen 42 is provided on the shell 4. A microphone 151 receiving cavity 15 is provided on one side of the cabinet 1, so that the microphone 151 can be housed on one side of the cabinet 1. The shell 4 can be closed for easy carrying. When the display screen 42 is needed, the display screen 42 can be opened and the microphone can be taken out to achieve the song selection experience.

[0057] A U-shaped iron 5Z is mounted on the frame 4Z of a low-frequency speaker. A washer 7Z is mounted on the U-shaped iron 5Z. A magnet 6Z is positioned between the U-shaped iron 5Z and the washer 7Z. A receiving groove 71Z is located in the middle of the washer 7Z, and a spider 10Z is placed inside the receiving groove 71Z. The upper surface of the spider 10Z is connected to the lower surface of the boss 21Z. A voice coil 8Z is placed inside the cavity 9Z. The voice coil 8Z can bounce within the cavity 9Z. That is, the voice coil 8Z is fitted outside the washer 7Z and the magnet frame, and the spider 10Z is placed inside the washer 7Z. The voice coil 8Z is fitted over the washer 7Z, and its upper side is connected to one end of the dust cap 1Z. The middle part of the dust cap 1Z is connected to the upper surface of the boss 21Z, thus allowing the spider to be positioned in the middle rather than on the outside of the magnet 6Z. Since the spider 10Z is fixed within the receiving groove 71Z and secured to the dust cap 1Z by the limiting post 2Z, it can better drive the spider 10Z to move evenly, resulting in better sound quality. Because the spider 10Z is positioned on the washer 7Z, the outer side of the washer 7Z has more... The larger space accommodates a larger voice coil 8Z, and the larger cross-section of the voice coil 8Z can generate a larger magnetic field. Using this structure in a speaker of the same size, the voice coil is placed within the cavity 9Z, allowing for a larger cross-sectional area of ​​the cavity 9Z. This, in turn, allows for a larger cross-sectional area of ​​the voice coil 8Z. The larger voice coil 8Z can cover a larger magnetic field area, generating a stronger driving force under the same current. This allows the cone 3Z to vibrate over a wider range, contributing to stronger driving force at low frequencies and more effectively pushing more air, resulting in a lower frequency response. A lower low-frequency response is beneficial for creating a sense of immersion in the sound. Furthermore, the increased cross-sectional area of ​​the voice coil 8Z, specifically the connection point between the voice coil 8Z and the dust cap 1Z or the cone 3Z, prevents deviation between the left and right sides of the cone 3Z during movement, minimizing split vibrations and improving the fidelity and clarity of the audio signal, thus contributing to a lower frequency limit.

[0058] Example 2.

[0059] In this embodiment, as Figure 3 As shown, the other structures are the same as in Embodiment 1, except that a second baffle 34 is provided on the side of the sound guide channel 3 near the enclosure 1. One end of the second baffle 34 is connected to the inner wall of the other end of the enclosure 1, and the other end of the second baffle 34 extends towards the end of the enclosure 1 near the sound inlet 31, forming a sound outlet channel 32 between the second baffle 34 and the interior of one side of the enclosure 1. By adding the second baffle 34, the sound transmission path and transmission time are made longer, thereby further increasing the sound mixing time and improving clarity.

Claims

1. A low-frequency compression portable speaker, characterized in that: The enclosure includes a cabinet with a mounting groove in the center and a top cover above the mounting groove. A cavity is formed between the mounting groove and the top cover. A low-frequency speaker is installed in the cavity and passes through the top cover. A sound guide channel is provided on one side of the cavity, and a baffle is provided in the sound guide channel. One end of the baffle is connected to the inner wall of the enclosure near the sound inlet, and the other end of the baffle extends to the other end of the enclosure. The low-frequency speaker includes a frame, on which a U-shaped iron is mounted. A magnet is mounted on the U-shaped iron, and a washer is mounted on the magnet. A cavity is provided between the U-shaped iron and the side of the washer, and a voice coil is disposed within the cavity. The upper end of the voice coil is connected to the bottom of the dust cap. A receiving groove is provided above the washer, and the receiving groove is provided with a spring and a limiting post. The middle part of the spring is connected to the middle part of the dust cap through the limiting post.

2. The low-frequency compression portable speaker according to claim 1, characterized in that: The sound guide channel has a sound inlet on the side near the cavity, and a sound outlet is formed on the inner wall of the sound guide channel near the cabinet. The top cover has a sound outlet corresponding to the sound outlet.

3. A low-frequency compression portable speaker according to claim 1, characterized in that: A second baffle is provided on the side of the sound guide channel near the cabinet. One end of the second baffle is connected to the inner wall of the other end of the cabinet, and the other end of the second baffle extends towards the end of the cabinet near the sound inlet, forming a sound outlet channel between the second baffle and the interior of one side of the cabinet.

4. A low-frequency compression portable speaker according to claim 1, characterized in that: One or more mounting posts are provided inside the cavity, and the low-frequency speaker is mounted on the mounting posts by screws.

5. A low-frequency compression portable speaker according to claim 1, characterized in that: The basin frame is also equipped with a speaker cone, one end of which is connected to the basin frame and the other end of which is connected to a dust cap.

6. A low-frequency compression portable speaker according to claim 1, characterized in that: The enclosure has an openable shell on top, with a display screen on the shell. A microphone housing is located on one side of the enclosure near the connection point. A protrusion is located on the side of the housing near the outer wall of the enclosure, extending to the other side of the housing. The microphone handheld part is positioned between the protrusion and the other side of the housing.

7. A low-frequency compression portable speaker according to claim 6, characterized in that: A mounting surface is provided at the top of the protrusion, and a mounting hole is provided on the mounting surface. The fixed end of the hinge is connected to the mounting hole by a screw, and the movable end of the hinge is connected to the outer casing.

8. A low-frequency compression portable speaker according to claim 1, characterized in that: The wave is arched upwards in the shape of a convex frustum, and a perforation is provided in the middle of the wave.

9. A low-frequency compression portable speaker according to claim 8, characterized in that: The limiting post includes an extension part and a boss. The boss protrudes outward from the outer side wall of the extension part. The extension part passes through the through hole, and the lower surface of the boss is connected to the spring.

10. A low-frequency compression portable speaker according to claim 1, characterized in that: The cross-sectional area of ​​the inner wall of the voice coil is greater than the cross-sectional area of ​​the spider wave.

Images