High-frequency sound emitting unit and loudspeaker

Abstract

The utility model discloses high frequency sounding unit and loudspeaker, this high frequency sounding unit includes: treble driver, it is equipped with the sounding surface, and the sounding surface is equipped with the installation slot, phase plug, it is connected in the installation slot and extends the installation slot outside, and the installation slot is equipped with a plurality of sounding channel in the periphery of phase plug, and the sound wave that treble driver sends reaches phase plug along with sounding channel, the horn is equipped with the connecting seat that is connected to the sounding surface, and the connecting seat is equipped with the compression mouth that covers all sounding channel, and phase plug extends to compression mouth, and compression mouth is equipped with inner taper face, and the radial dimension of inner taper face decreases along with the sounding direction of treble driver. Compared with prior art, the sound wave propagation path of the present technology is shorter, and the phase is more consistent, which is beneficial to improve the transient characteristics of high frequency signal, and the setting of compression mouth reduces the abnormal attenuation or peak value of high frequency energy, makes the frequency response curve more flat, and a series of changes promote the sound characteristics of the present technology to be superior to prior art.

Description

Technical Field

[0001] This utility model relates to the technical field of acoustics, and in particular to a high-frequency sound generating unit and a loudspeaker. Background Technology

[0002] In traditional loudspeaker system design, high-frequency drivers are often used in combination with horns to project sound waves into the space to achieve long-distance, large-area propagation.

[0003] As the requirements for loudspeakers continue to increase, there is still room for improvement in the structure of existing high-frequency sound units. For example, the sound characteristics of high-frequency sound units can be improved through structural modifications. Utility Model Content

[0004] The present invention aims to provide a high-frequency sound-generating unit that can improve sound characteristics.

[0005] The high-frequency sound generating unit according to a first aspect embodiment of the present invention includes:

[0006] A tweeter driver having a sound-emitting surface, the sound-emitting surface having a mounting groove;

[0007] A phase plug is connected in the mounting slot and extends out of the mounting slot. The mounting slot has multiple sound channels around the phase plug. The sound waves emitted by the tweeter reach the phase plug through the sound channels.

[0008] The horn is provided with a connector connected to the sound-emitting surface. The connector is provided with a compression port covering all sound-emitting channels. The phase plug extends to the compression port. The compression port is provided with an inner conical surface. The radial dimension of the inner conical surface decreases along the sound-emitting direction of the tweeter.

[0009] The high-frequency sound generating unit according to the embodiments of this utility model has at least the following beneficial effects: placing the phase plug externally to the tweeter driver not only effectively reduces the size of the tweeter driver, but also shortens the path of the sound wave from the diaphragm to the horn throat, reducing the phase delay of the sound wave propagation and making the phase consistency of the high-frequency signal better; the setting of the compression port can reduce the transition area between the horn and the phase plug, so that the sound wave is compressed and accelerated before entering the horn. The compressed sound wave propagates in a smaller cross-sectional area, increasing the propagation speed, allowing the high-frequency sound wave to reach the horn outlet faster, reducing phase lag, and also reducing the phase inconsistency of the diaphragm. The mutual interference of sound waves generated in the transition region reduces distortion caused by phase difference. On the other hand, since high-frequency sound waves have shorter wavelengths, they are easily attenuated by reflection and diffraction in complex acoustic structures. Therefore, the setting of the compression port allows high-frequency sound waves to enter the horn more directly, reducing unnecessary energy loss. Compared with the prior art, the sound wave propagation path of this technology is shorter and the phase is more consistent, which is beneficial to improving the transient characteristics of high-frequency signals. The setting of the compression port reduces abnormal attenuation or peaks of high-frequency energy, making the frequency response curve flatter. This series of changes makes the sound characteristics of this technology superior to those of the prior art.

[0010] According to some embodiments of the present invention, the phase plug has an outer conical surface, and the radial dimension of the outer conical surface decreases along the sound-emitting direction of the tweeter.

[0011] According to some embodiments of the present invention, the taper of the outer conical surface is greater than the taper of the inner conical surface.

[0012] According to some embodiments of the present invention, the mounting groove is provided with a mounting hole that passes through the tweeter, and the phase plug is provided with a connection hole that is directly opposite the mounting hole.

[0013] According to some embodiments of the present invention, the tweeter driver is provided with a terminal extending to the sound-emitting surface, and the connector is provided with a clearance space to avoid the terminal.

[0014] According to some embodiments of the present invention, the horn is provided with a sound amplification channel connected to the compression port, and the outlet area of ​​the sound amplification channel is larger than the inlet area of ​​the sound amplification channel.

[0015] According to some embodiments of the present invention, the amplification channel includes two arc surfaces and two inclined surfaces, and the two arc surfaces are connected by the inclined surfaces.

[0016] According to some embodiments of the present invention, the two arc surfaces are mirror-symmetrically arranged about the longitudinal geometric symmetry axis of the horn; the two inclined surfaces are mirror-symmetrically arranged about the transverse geometric symmetry axis of the horn.

[0017] According to some embodiments of the present invention, the horn is provided with a panel, the panel is respectively in contact with two inclined surfaces, both of the two arc surfaces protrude outward from the panel, and both of the arc surfaces form a mounting position with an internal space with the panel.

[0018] The loudspeaker according to a second aspect embodiment of the present invention includes:

[0019] The enclosure has a mounting base inside, and a sound-emitting hole is opened on the front of the enclosure.

[0020] In the aforementioned high-frequency sound-generating unit, the horn is connected to the mounting base, and the horn is positioned directly opposite the sound-generating hole.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a three-dimensional structural schematic diagram of the high-frequency sound-generating unit provided in an embodiment of the present utility model;

[0024] Figure 2 yes Figure 1 An exploded three-dimensional view of the high-frequency sound-generating unit shown;

[0025] Figure 3 yes Figure 1 The front view of the high-frequency sound-generating unit shown;

[0026] Figure 4 yes Figure 1 A top view of the high-frequency sound-generating unit shown;

[0027] Figure 5 yes Figure 4 The high-frequency sound-generating unit shown is a cross-sectional view along section line AA.

[0028] In the attached diagram: 100-Tweeter driver, 200-Phase plug, 300-Horn, 110-Sound source surface, 210-Connector, 220-Phase part, 111-Mounting slot, 112-Secondary slot, 113-Mounting hole, 220-Outer conical surface, 120-Sound source channel, 310-Connector, 320-Amplification channel, 311-Compression port, 312-Inner conical surface, 114-Assembly clearance, 313-Boss, 321-Arc surface, 322-Bevel, 314-Clearing space, 330-Panel, 331-Mounting position. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0033] like Figures 1 to 5 As shown, the high-frequency sound generating unit according to the first aspect of the present invention includes a tweeter driver 100, a phase plug 200, and a horn 300. The tweeter driver 100 has a built-in voice coil, a diaphragm, and a magnetic circuit. The tweeter driver 100 receives high-frequency audio signals through a terminal block. The magnitude and direction of the current inside the tweeter change with the signal. The voice coil is subjected to Ampere force in the magnetic field, generating vibrations that are synchronized with the current changes, thereby driving the diaphragm to vibrate synchronously. The vibration of the diaphragm pushes the surrounding air molecules to form high-frequency sound waves.

[0034] Because the sound waves from the tweeter driver 100 are directional, when the tweeter driver 100 is installed inside a loudspeaker, the direction of sound wave propagation must point towards the loudspeaker's sound-emitting hole. In this embodiment, the side of the tweeter driver 100 facing the sound-emitting hole is defined as the sound-emitting surface 110, and the sound waves from the tweeter driver 100 propagate outward through the sound-emitting surface 110. For ease of description, the tweeter driver 100 has a forward-propagating sound-emitting direction.

[0035] For example, the phase plug 200 is a metal component used to replace a traditional dust cover to improve acoustic performance. Its core feature is that it does not vibrate synchronously with the diaphragm during operation, thereby reducing the hysteresis time by reducing the secondary reflection path of sound waves, thus reducing standing wave distortion and smoothing the frequency response characteristic diffusion curve. The phase plug 200 includes an integrally formed connecting portion 210 and a phase portion 220, the phase portion 220 being larger than the connecting portion 210.

[0036] The tweeter driver 100 has a mounting groove 111 on its sound-emitting surface 110. The mounting groove 111 is a recess on the sound-emitting surface 110. A secondary groove 112 is formed in the middle of the mounting groove 111, and a mounting hole 113 through the tweeter driver 100 is formed in the middle of the secondary groove 112. The radial dimensions of the mounting groove 111, the secondary groove 112, and the mounting hole 113 decrease sequentially. The size of the mounting groove 111 is larger than the size of the phase portion 220, and the size of the secondary groove 112 is larger than the size of the connecting portion 210 but smaller than the size of the phase portion 220. In this embodiment, the mounting hole 113 is provided in the front-rear direction; correspondingly, the connecting portion 210 of the phase plug 200 has a connecting hole facing the mounting hole 113. When the connecting portion 210 is placed in the secondary groove 112, a screw can be threaded through the mounting hole 113 on the rear side of the tweeter driver 100 to connect with the connecting hole of the connecting portion 210, thereby installing the phase plug 200 in the mounting groove 111.

[0037] After the connecting portion 210 of the phase plug 200 is connected to the secondary slot 112, since the phase portion 220 of the phase plug 200 is larger than the size of the secondary slot 112, the phase portion 220 is external to the secondary slot 112 and extends out of the mounting slot 111. In this embodiment, the phase portion 220 is provided with an outer conical surface 220, the radial dimension of which decreases along the sound emission direction of the tweeter driver 100, that is, the radial dimension of the outer conical surface 220 decreases along the front. The mounting slot 111 is provided with a plurality of sound emission channels 120 around the phase plug 200, and the sound waves emitted by the tweeter driver 100 reach the phase plug 200 along the sound emission channels 120.

[0038] In other embodiments, the mounting hole 113 can also be set in a direction orthogonal to the front and rear straight lines. In this case, the connection hole of the phase plug 200 is also set in a direction orthogonal to the front and rear straight lines. Since the radial dimension of the tweeter 100 is larger than the axial dimension, the above setting requires a deeper hole. Therefore, it is only used as a reference embodiment.

[0039] For example, the horn 300 can be made of plastic or metal. Since the horn 300 has a relatively complex structure, in this embodiment, the material of the horn 300 is chosen to be plastic, preferably high-density plastic. The horn 300 includes an integrally formed connecting base 310 and a sound amplification channel 320. The outlet area of ​​the sound amplification channel 320 is larger than the inlet area of ​​the sound amplification channel 320, enabling the horn 300 to achieve long-distance, large-area sound wave propagation. The connecting base 310 of the horn 300 is detachably connected to the sound-emitting surface 110 of the tweeter driver 100 by screws. The connecting base 310 is provided with a compression port 311 communicating with the sound amplification channel 320, allowing the sound waves emitted by the tweeter driver 100 to enter the sound amplification channel 320 through the compression port 311. The compression port 311 is provided with an inner conical surface 312, the radial dimension of which decreases along the sound-emitting direction of the tweeter driver 100, that is, the radial dimension of the inner conical surface 312 decreases along the front.

[0040] In this embodiment, a certain assembly gap 114 is left between the multiple sound-emitting channels 120 in the mounting groove 111 and the groove wall of the mounting groove 111. This assembly gap 114 is used to assemble the connecting seat 310. Correspondingly, the connecting seat 310 has a boss 313 provided along the assembly gap 114, and a compression port 311 is formed in the boss 313. When the connecting seat 310 of the horn 300 is assembled with the sound-emitting surface 110 of the tweeter 100, the size of the compression port 311 covers all the sound-emitting channels 120, so that the sound waves emitted by the tweeter 100 can all enter the compression port 311 through the multiple sound-emitting channels 120.

[0041] Since the phase portion 220 of the phase plug 200 extends beyond the mounting groove 111, the phase portion 220 of the phase plug 200 also extends to the compression port 311. However, the phase portion 220 does not exceed the compression port 311, and the taper of the outer conical surface 220 of the phase portion 220 is greater than the taper of the inner conical surface 312 of the compression port 311, so as to reserve a channel for sound waves to pass through between the phase portion 220 and the compression port 311.

[0042] Although this utility model does not limit the specific structure of the amplification channel 320, in this embodiment, the amplification channel 320 includes two arc surfaces 321 and two inclined surfaces 322. The two arc surfaces 321 are connected by the inclined surfaces 322. The shapes of the arc surfaces 321 and the inclined surfaces 322 can be referred to Figure 3The two curved surfaces 321 are mirror-symmetrically arranged about the longitudinal geometric symmetry axis of the horn 300, and the two inclined surfaces 322 are mirror-symmetrically arranged about the transverse geometric symmetry axis of the horn 300. After being compressed by the compression port 311, the sound waves enter the amplification channel 320. Since the outlet size of the amplification channel 320 is much larger than its inlet size, the propagation speed of the sound waves slows down in the amplification channel 320, allowing the sound waves to diffuse wide-angle to the left and right along the two curved surfaces 321 and wide-angle to the up and down along the two inclined surfaces 322, so as to achieve the purpose of long-distance, large-area propagation.

[0043] By adopting the above structure, placing the phase plug 200 externally in the tweeter driver 100 not only effectively reduces the size of the tweeter driver 100, but also shortens the path of the sound wave from the diaphragm to the throat of the horn 300, reducing the phase delay of sound wave propagation and improving the phase consistency of the high-frequency signal. Furthermore, the compression port 311 reduces the transition area between the horn 300 and the phase plug 200, compressing and accelerating the sound wave before it enters the horn 300. The compressed sound wave propagates within a smaller cross-sectional area, increasing its propagation speed and allowing the high-frequency sound wave to reach the horn 300 outlet faster, reducing phase lag and minimizing interference between sound waves generated at different parts of the diaphragm in the transition area, thereby reducing distortion caused by phase difference. On the other hand, because high-frequency sound waves have shorter wavelengths, they are easily attenuated by reflection and diffraction in complex acoustic structures. Therefore, the compression port 311 allows high-frequency sound waves to enter the horn 300 more directly, reducing unnecessary energy loss.

[0044] Compared with existing technologies, this technology has a shorter sound wave propagation path and more consistent phase, which is beneficial to improving the transient characteristics of high-frequency signals. The setting of compression port 311 reduces abnormal attenuation or peak of high-frequency energy, making the frequency response curve flatter. These changes make the sound characteristics of this technology superior to those of existing technologies.

[0045] like Figure 2 As shown, in some embodiments of this utility model, the tweeter 100 is provided with a terminal extending to the sound-emitting surface 110, and the connector 310 is provided with a clearance 314 to avoid the terminal, so as to facilitate the wiring of the terminal.

[0046] like Figure 1 and Figure 4As shown, in some embodiments of this utility model, the horn 300 is further provided with a panel 330, which is integrally formed with the diffusion channel 320. The horn 300 is connected to the external connecting structure through the panel 330. The panel 330 is respectively connected to two inclined surfaces 322, and two arc surfaces 321 protrude outward from the panel 330, forming a mounting position 331 with an internal space with the panel 330. When assembling the horn 300, the positioning member can be inserted into the mounting position 331 first to achieve the initial positioning of the horn 300, and then it can be fixedly connected to the external connecting structure through the holes on the panel 330. This arrangement can stabilize the position of the horn 300 to prevent the horn 300 from displacing or resonating due to sound vibration, and can also reduce manufacturing costs by utilizing the shape characteristics of the arc surface 321 itself.

[0047] A loudspeaker according to a second aspect embodiment of the present invention includes a high-frequency sound-emitting unit according to the first aspect embodiment of the present invention. The loudspeaker has a housing (not shown in the drawings), and a mounting base for mounting a horn 300 is provided inside the housing. A sound-emitting hole is provided on the front of the housing. The horn 300 is fixedly connected to the mounting base via a mounting position 331 and a panel 330. The outlet of the horn 300 is directly opposite the sound-emitting hole, so that the sound waves emitted by the tweeter driver 100 can sequentially pass through the sound-emitting channel 120, the compression port 311, and the amplification channel 320, and finally propagate out of the loudspeaker from the sound-emitting hole.

[0048] Since the loudspeaker adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0049] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A high-frequency sound-generating unit, characterized in that, include: A tweeter driver (100) has a sound-emitting surface (110) and a mounting groove (111) is provided on the sound-emitting surface (110); A phase plug (200) is connected in the mounting groove (111) and extends out of the mounting groove (111). The mounting groove (111) has a plurality of sound channels (120) around the phase plug (200). The sound waves emitted by the tweeter (100) reach the phase plug (200) along the sound channels (120). The horn (300) is provided with a connector (310) connected to the sound-emitting surface (110). The connector (310) is provided with a compression port (311) covering all sound-emitting channels (120). The phase plug (200) extends to the compression port (311). The compression port (311) is provided with an inner conical surface (312). The radial dimension of the inner conical surface (312) decreases along the sound-emitting direction of the tweeter (100).

2. The high-frequency sound generating unit according to claim 1, characterized in that: The phase plug (200) has an outer conical surface (220), the radial dimension of which decreases along the sound-emitting direction of the tweeter (100).

3. The high-frequency sound generating unit according to claim 2, characterized in that: The taper of the outer conical surface (220) is greater than the taper of the inner conical surface (312).

4. The high-frequency sound generating unit according to claim 1, characterized in that: The mounting slot (111) is provided with a mounting hole (113) that passes through the tweeter (100), and the phase plug (200) is provided with a connection hole that is directly opposite the mounting hole (113).

5. The high-frequency sound generating unit according to claim 1, characterized in that: The tweeter driver (100) is provided with a terminal extending to the sound-emitting surface (110), and the connector (310) is provided with a clearance (314) that avoids the terminal.

6. The high-frequency sound generating unit according to claim 1, characterized in that: The horn (300) is provided with a sound amplification channel (320) connected to the compression port (311), and the outlet area of ​​the sound amplification channel (320) is larger than the inlet area of ​​the sound amplification channel (320).

7. The high-frequency sound generating unit according to claim 6, characterized in that: The amplification channel (320) includes two arc surfaces (321) and two inclined surfaces (322), with the two arc surfaces (321) being connected by the inclined surfaces (322).

8. The high-frequency sound generating unit according to claim 7, characterized in that: The two arc surfaces (321) are mirror-symmetrical about the longitudinal geometric axis of the horn (300); the two inclined surfaces (322) are mirror-symmetrical about the transverse geometric axis of the horn (300).

9. The high-frequency sound generating unit according to claim 7, characterized in that: The horn (300) is provided with a panel (330), which is respectively connected to two inclined surfaces (322). Two curved surfaces (321) protrude outward from the panel (330), and the two curved surfaces (321) form a mounting position (331) with an internal space with the panel (330).

10. A loudspeaker, characterized in that, include: The enclosure has a mounting base inside, and a sound-emitting hole is opened on the front of the enclosure. In the high-frequency sound-generating unit as described in any one of claims 1 to 9, the horn (300) is connected to the mounting base, and the horn (300) is positioned directly opposite the sound-generating hole.

Images