Coaxial loudspeaker and sound production equipment

Abstract

The invention provides a coaxial loudspeaker and sound production equipment. The coaxial loudspeaker comprises a tweeter, a mid-bass loudspeaker and a filtering piece, the mid-bass loudspeaker and the tweeter are located on the same axis. And the filtering piece is arranged in the sounding area of the mid-bass horn and used for filtering high-frequency sound of the mid-bass horn, and the filtering piece avoids the sounding area of the tweeter. According to the coaxial loudspeaker, the mechanical filtering piece and the coaxial loudspeaker are integrally designed and are integrated in the sound production area of the mid-bass loudspeaker, meanwhile, the sound production area of the tweeter is avoided, the high-frequency interval of the bass loudspeaker can be debugged under the condition that normal sound production of the tweeter of the coaxial loudspeaker is guaranteed, and therefore the timbre and the tone quality of the coaxial loudspeaker are guaranteed.

Description

Technical Field

[0001] The present application belongs to the field of loudspeakers, and more specifically, to a coaxial loudspeaker and a sound-generating device. Background Art

[0002] Coaxial speakers are a unique speaker design that features two speakers cleverly mounted on the same axis. The two speakers each have their own duties, one specifically responsible for reproducing the high pitch, while the other focuses on reproducing the mid-bass. This design not only optimizes the spatial layout of the speakers, but also aims to achieve a more balanced and coordinated sound quality output.

[0003] The mid-bass speaker and tweeter each have their own functions, but they also need to work well together, which is specifically reflected in the crossover point. Coaxial speakers usually have an external passive filter, which is mainly composed of inductors, capacitors and resistors. By adjusting the mid-high frequency of the woofer and the tweeter at the crossover point, a good connection is achieved to ensure a balanced tone. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a coaxial speaker and a sound-producing device, thereby providing another way to achieve a good connection between the mid-bass and the treble.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide a coaxial speaker, the coaxial speaker comprising:

[0006] tweeter;

[0007] Mid-bass speaker; the mid-bass speaker and the tweeter are located on the same axis;

[0008] Filtering element; the filtering element is arranged in the pronunciation area of ​​the mid-bass speaker to filter out the high-frequency sound of the mid-bass speaker, and the filtering element avoids the pronunciation area of ​​the tweeter.

[0009] Optionally, a avoidance hole is provided in the middle of the filter element, and the sound producing area of ​​the tweeter is located in the avoidance hole.

[0010] Optionally, the tweeter is arranged in the sound producing area of ​​the mid-bass speaker, a avoidance hole is arranged in the middle of the filter element, and the tweeter is arranged in the avoidance hole.

[0011] Optionally, the coaxial speaker includes a speaker frame, the speaker frame includes a first frame and a second frame, the mid-bass speaker is installed on the first frame, the tweeter is installed on the second frame, and the filter is connected between the first frame and the second frame.

[0012] Optionally, the second frame is located in the middle of the first frame, the filter element has a first connecting edge arranged along the outer periphery of the filter element and a second connecting edge along the circumference of the avoidance hole, the first connecting edge is connected to the first frame, and the second connecting edge is connected to the second frame.

[0013] Optionally, a support member is connected between the first frame and the second frame to support the second frame, and the filter element is connected to the support member.

[0014] Optionally, the filter element includes a flexible filter material and a frame, the frame is connected between the first frame and the second frame, and the flexible filter material is connected to the frame.

[0015] Optionally, the material of the skeleton includes at least one of iron wire, steel wire, plastic, and fiber.

[0016] Optionally, the material of the filter element includes at least one of mesh cloth, non-woven fabric, cotton cloth, and fiber cloth.

[0017] The present application also provides a sound-generating device, which includes the above-mentioned coaxial speaker.

[0018] The beneficial effects of the coaxial speaker and sound-producing device provided by the present application are as follows: compared with the prior art, the coaxial speaker of the embodiment of the present application integrates the mechanical filter element and the coaxial speaker into an integrated design, and integrates it in the sound-producing area of ​​the mid-bass speaker of the coaxial speaker, while avoiding the sound-producing area of ​​the tweeter. This can ensure that the tweeter of the coaxial speaker can produce sound normally, while making the connection between the treble and bass of the coaxial speaker more natural, and adjust the crossover point to obtain a smoother and more balanced tone, while suppressing possible sound wave reflections in the cavity, thereby improving the sound quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 A three-dimensional schematic diagram of a coaxial speaker according to an embodiment of the present application;

[0021] Figure 2 A schematic top view of a coaxial speaker according to an embodiment of the present application;

[0022] Figure 3 for Figure 2 AA section view;

[0023] Figure 4 A schematic diagram of a filter element according to an embodiment of the present application;

[0024] Figure 5 A schematic diagram of the skeleton of the filter element of an embodiment of the present application;

[0025] Figure 6A test schematic diagram of a coaxial speaker according to an embodiment of the present application;

[0026] Figure 7 A schematic diagram comparing the frequency response curves of the coaxial speaker of the embodiment of the present application and the traditional coaxial speaker;

[0027] Figure 8 Schematic diagram comparing the frequency response curves of the coaxial speaker and the coaxial speaker with inductance according to the embodiment of the present application.

[0028] Among them, the reference numerals in the figure are:

[0029] Mid-bass speaker 1, tweeter 2, filter element 3, first connecting edge 31, second connecting edge 32, avoidance hole 33, flexible filter material 34, frame 35; first frame 4, second frame 5, support element 6. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] Speakers are also called loudspeakers. There are many types of speakers. Among them, coaxial speakers are two speakers installed on an axis. These two speakers are responsible for reproducing high pitch and mid-bass respectively. During the operation of the coaxial speaker, the mid-bass speaker 1 may inevitably produce some high-frequency sounds while producing mid-low frequency sounds. If these high-frequency sounds are not handled properly, they may have a negative impact on the overall sound quality of the coaxial speaker, causing the sound quality to become impure or contain noise.

[0035] The current solution is usually to use frequency division. There are two main frequency division methods: electronic frequency division and passive frequency division. Electronic frequency division is achieved by using digital signal processing by the DSP in the circuit to retain the required frequency band and discard the unnecessary frequency band; passive frequency division is achieved by using passive devices such as capacitors and inductors that are selective to frequency, with capacitors passing high frequencies and isolating low frequencies, and inductors passing low frequencies and isolating high frequencies. This application provides a solution different from traditional frequency division.

[0036] See also Figure 1 , Figure 2 and Figure 3 Now, the coaxial speaker provided in the embodiment of the present application is described. The coaxial speaker comprises:

[0037] Tweeter 2;

[0038] A mid-bass speaker 1; the mid-bass speaker 1 and the tweeter 2 are located on the same axis;

[0039] Filter element 3 ; the filter element 3 is arranged in the pronunciation area of ​​the mid-bass speaker 1 to filter out the high-frequency sound of the mid-bass speaker 1 , and the filter element 3 avoids the pronunciation area of ​​the tweeter 2 .

[0040] The tweeter 2 of the present application is responsible for the sound part of the treble frequency in the audio spectrum, and the treble refers to the higher frequency part in the audio spectrum. In conventional music and the audible range of the human ear, the treble usually refers to the frequency of about 2kHz and above. The treble part contains many details in the music, such as the overtones of musical instruments, the crispness of human voices, and the sound of high-frequency percussion instruments. The enhancement of treble can make the music sound brighter and sharper, but over-emphasis may cause harshness. The mid-bass speaker 1 emits the sound part of the mid-bass frequency in the audio spectrum. The frequency range of the mid-bass is roughly between 20Hz and 2kHz. But it may also vary due to different designs of the mid-bass speaker 1. The mid-bass has the characteristics of being thick, full, and deep, and can enhance the rhythm and dynamics of the music. The mid-bass speaker 1 and the tweeter 2 are located on the same axis to form a coaxial speaker, and the sound output of the tweeter 2 and the mid-bass speaker 1 complement each other. The tweeter 2 provides bright treble details, while the mid-bass speaker 1 provides a thick bass foundation.

[0041] In this embodiment, a filter element 3 is provided in the pronunciation area of ​​the mid-bass speaker 1, and the pronunciation area here refers to the area where the speaker sound is emitted and diffused outward. After the filter element 3 is provided in the pronunciation area of ​​the mid-bass speaker 1, the high-frequency noise or unnecessary high-frequency components that may be generated by the woofer during the sounding process can be filtered out. The design of the filter element 3 avoids the pronunciation area of ​​the tweeter 2 to ensure that the normal sounding of the tweeter 2 is not disturbed. Because in the coaxial speaker, because the mid-bass speaker 1 is mainly designed to emit medium-frequency and low-frequency sounds, the high-frequency sound it produces is often not what we want. The high-frequency sound filtered out by the filter element 3 actually refers to the high-frequency noise or unnecessary high-frequency components that may be generated by the mid-bass speaker 1, and the high-frequency sound emitted by the tweeter 2 is a normal high-frequency sound, so it should not be filtered out. Therefore, the filter element 3 avoids the pronunciation area of ​​the tweeter 2.

[0042] It can be seen that the present embodiment utilizes the characteristic that the filter element 3 can filter out high-frequency sounds, and specifically integrates it in the pronunciation area of ​​the mid-bass speaker 1 of the coaxial speaker, while avoiding the pronunciation area of ​​the tweeter 2, thereby exerting an effect similar to that of a passive filter, making the connection between the treble and bass of the coaxial speaker more natural. In addition, the mechanical filtering device can also be used to slow down the sound reflection brought by the front cavity, making the frequency response curve smoother and reducing distortion, thereby effectively improving the sound quality.

[0043] In some embodiments of the present application, a avoidance hole 33 is provided in the middle of the filter element 3, and the sound producing area of ​​the tweeter 2 is located in the avoidance hole 33. Since the tweeter 2 and the mid-bass speaker 1 of the coaxial speaker are coaxially arranged, it is difficult to set the filter element 3 to filter the mid-bass speaker 1 alone.

[0044] In this embodiment, a avoidance hole 33 is provided in the middle of the filter element 3. The purpose of designing this hole is to provide an unobstructed space for the sound-generating area of ​​the tweeter 2, ensuring that the tweeter 2 can emit sound freely without being blocked by the filter element 3. The sound-generating area of ​​the tweeter 2 is precisely placed in the avoidance hole 33 of the filter element 3, ensuring that the high-frequency sound can be transmitted smoothly and clearly.

[0045] like Figures 1 to 4 As shown, in some other embodiments of the present application, the tweeter 2 is arranged in the pronunciation area of ​​the mid-bass speaker 1, a avoidance hole 33 is arranged in the middle of the filter 3, and the tweeter 2 is arranged in the avoidance hole 33. Because it is difficult to accurately control the pronunciation area of ​​the tweeter 2, in this embodiment, the tweeter 2 is arranged in the pronunciation area of ​​the mid-bass speaker 1, that is, the tweeter 2 and the woofer are arranged overlapping on the same axis, which is the arrangement form of the tweeter 2 and the woofer of many coaxial speakers.

[0046] The filter element 3 is a structure located in front of the mid-bass speaker 1, and its main function is to filter out certain unnecessary frequency components, especially high-frequency noise, generated by the mid-bass speaker 1. A avoidance hole 33 is designed in the middle of the filter element. This hole is to provide an unobstructed channel for the tweeter 2 so that it can emit sound directly outward without being blocked by the filter element 3. The tweeter 2 is precisely installed in the avoidance hole 33 of the filter element 3. In this way, the high-frequency sound emitted by the tweeter 2 can directly pass through the avoidance hole 33 without any obstruction from the filter element 3. In comparison, the present embodiment directly sets the tweeter 2 in the avoidance hole 33, which is easier to design and process, and has higher stability.

[0047] like Figure 3 As shown, in some embodiments of the present application, the coaxial speaker includes a speaker frame, the speaker frame includes a first frame 4 and a second frame 5, the mid-bass speaker 1 is installed on the first frame 4, the tweeter 2 is installed on the second frame 5, and the filter element 3 is connected between the first frame 4 and the second frame 5.

[0048] Because the coaxial speaker is a combination of a tweeter 2 and a woofer, a speaker frame is usually provided to facilitate the assembly of the tweeter 2 and the woofer. The speaker frame is a key structure for supporting and fixing the tweeter 2 and the mid-bass speaker 1. The speaker frame consists of two main parts: a first frame body 4 and a second frame body 5. The two frames can be connected through an intermediate bracket or directly.

[0049] The mid-bass speaker 1 is mounted on a first frame 4. This frame provides sufficient support and stability to ensure that the mid-bass speaker 1 can work properly and produce clear sound. The tweeter 2 is mounted on a second frame 5. Since the tweeter 2 is usually small and light, the second frame 5 may not need to be as strong as the first frame 4, but still needs to be stable enough to support the vibration and sound of the tweeter 2.

[0050] The first frame 4 and the second frame 5 provide a stable connection basis for the installation of the filter element 3. Therefore, in this embodiment, the filter element 3 is connected between the first frame 4 and the second frame 5, thereby achieving stable installation of the filter element 3. The filter element 3 can usually be connected to the first frame 4 and the second frame 5 by bonding, clamping, screw connection, etc.

[0051] like Figure 3 As shown, in some embodiments of the present application, the second frame 5 is located in the middle of the first frame, the filter element 3 has a first connecting edge 31 arranged along the outer periphery of the filter element 3 and a second connecting edge 32 along the circumference of the avoidance hole 33, the first connecting edge 31 is connected to the first frame 4, and the second connecting edge 32 is connected to the second frame 5.

[0052] In this embodiment, the speaker frame is mainly composed of a first frame body 4 and a second frame body 5. The second frame body 5 is located in the middle of the first frame body 4. This layout helps to ensure that the acoustic coupling between the tweeter 2 and the mid-bass speaker 1 is closer, thereby improving the phase consistency and directivity of the sound.

[0053] like Figure 3 As shown, the filter element 3 has a first connection edge 31 arranged along the periphery of the filter element 3 and a second connection edge 32 arranged along the circumference of the avoidance hole 33. The first connection edge 31 is connected to the first frame 4, which is the mounting part of the mid-bass speaker 1. Since the mid-bass speaker 1 usually has a larger diameter, the size of the first frame 4 is correspondingly larger, so the first connection edge 31 arranged along the periphery of the filter element 3 is connected thereto. The second connection edge 32 arranged along the circumference of the avoidance hole 33 is connected to the second frame 5, which is the position where the tweeter 2 is installed. In this way, the tweeter 2 can be exposed from the avoidance hole 33, and the filter element 3 between the first frame 4 and the second frame 5 just covers the part of the sounding area of ​​the mid-bass speaker 1 except for the tweeter 2, thereby ensuring that the filter element 3 can stably play its role in filtering out the high-frequency sound of the mid-bass speaker 1.

[0054] like Figure 3 As shown, in some embodiments of the present application, a support member 6 is connected between the first frame 4 and the second frame 5 to support the second frame 5 , and the filter element 3 is connected to the support member 6 .

[0055] The first frame 4 serves as the main supporting structure of the coaxial speaker, bearing the weight and vibration of the mid-bass speaker 1. The second frame 5 is located in the middle of the first frame 4 and is used to install the tweeter 2. In order to maintain the stability and position accuracy of the second frame 5, a support 6 is connected between the first frame 4 and the second frame 5. The main function of the support 6 is to support the second frame 5 to ensure that it does not shake or move during operation. In this way, the tweeter 2 can emit sound stably without being affected by the instability of the second frame 5. The support 6 may take a variety of forms, such as a metal rod, a plastic bracket or an elastic element, depending on the design requirements and intended use of the coaxial speaker.

[0056] In this embodiment, the support member 6 is used to connect the filter element 3 to the support member 6 , so that the filter element 3 is supported by the support member 6 , thereby ensuring the stability of the installation of the filter element 3 .

[0057] like Figure 5As shown, in some embodiments of the present application, the filter element 3 includes a flexible filter material 34 and a frame 35, the frame 35 is connected between the first frame 4 and the second frame 5, and the flexible filter material 34 is connected to the frame 35. The material that exerts the filtering effect in the filter element 3 is usually a flexible material, which is difficult to install directly. In this embodiment, the filter element 3 is mainly composed of two parts: the flexible filter material 34 and the frame 35. The frame 35 is the main supporting structure of the filter element 3. It is connected between the first frame 4 and the second frame 5, and provides a stable support for the flexible filter material 34, so that the flexible filter material 34 can stably and evenly cover the sound area of ​​the mid-bass speaker 1.

[0058] In some embodiments of the present application, the material of the skeleton 35 includes at least one of iron wire, steel wire, plastic, and fiber. Iron wire and steel wire are common materials for the skeleton 35 because they have high strength and good durability. These materials can withstand the stress and vibration generated by the filter element 3 during operation to ensure the stability of the filter structure. Plastic is a light and strong material suitable for manufacturing the skeleton 35. Plastic also has the advantages of cost-effectiveness and easy processing. Fiber materials, such as carbon fiber or glass fiber, have the advantages of high strength and low weight, and are also suitable for the installation of flexible filter material 34.

[0059] In some embodiments of the present application, the material of the filter element 3 includes at least one of mesh cloth, non-woven cloth, cotton cloth, and fiber cloth. These materials can filter out the high-frequency sound in the mid-bass speaker 1.

[0060] The following uses mesh as an example to demonstrate the embodiments of the present application.

[0061] like Figure 6 As shown, the woofer is driven by an electrical signal to vibrate mechanically, and the mechanical vibration drives the air to vibrate to produce sound. The sound is filtered by the mesh to filter the frequency components and reduce the reflection, and then passes through the sound outlet and reaches the human ear.

[0062] like Figure 7 As shown, the blue curve is the frequency response curve of the tweeter 2, the red curve is the frequency response curve of the traditional coaxial speaker without mesh cloth, and the black curve is the frequency response curve of the coaxial speaker in the embodiment of the present application. It can be seen that after the mesh cloth is set in the manner of the aforementioned embodiment of the present application, the sensitivity of the coaxial speaker after 2KHz is attenuated by an average of 2-3dB, and the low frequency is not greatly affected. Compared with the blue curve, the tweeter 2 can also be adjusted more flexibly at the 3KHz frequency division. At the same time, the yellow arrow shows that the setting of the mesh cloth has a good suppression of the peaks and valleys of the frequency response, making the frequency response curve smoother.

[0063] like Figure 8As shown, the black curve represents the frequency response curve of the coaxial speaker in the embodiment of the present application, and the red curve represents the frequency response curve when a 0.2MH inductor is set. It can be seen that setting the mesh cloth is basically equivalent to the effect of a 0.2mH inductor in the frequency response, but it can be seen from the yellow arrow that the solution of the embodiment of the present application is better for suppressing sound reflections.

[0064] Based on the above coaxial speaker, the present application also provides a sound device, which includes the above coaxial speaker. The sound device can be a home audio system, a sound bar, and various electronic devices that can make sounds. The sound device is provided with the coaxial speaker, which can filter out the high-frequency noise of the woofer while ensuring the normal sound of the tweeter 2 of the coaxial speaker, thereby ensuring the sound quality of the coaxial speaker.

[0065] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A coaxial speaker, characterized in that: The coaxial speaker comprises: tweeter; A mid-bass speaker; the mid-bass speaker and the tweeter are located on the same axis; Filter element; the filter element is arranged in the pronunciation area of ​​the mid-bass speaker to filter out the high-frequency sound of the mid-bass speaker, and the filter element avoids the pronunciation area of ​​the tweeter.

2. The coaxial speaker according to claim 1, characterized in that: A avoidance hole is arranged in the middle of the filter element, and the sound producing area of ​​the tweeter is located in the avoidance hole.

3. The coaxial speaker according to claim 1, characterized in that: The tweeter is arranged in the sound producing area of ​​the mid-bass speaker, a avoidance hole is arranged in the middle of the filter element, and the tweeter is arranged in the avoidance hole.

4. The coaxial speaker according to claim 3, characterized in that: The coaxial speaker includes a speaker frame, which includes a first frame and a second frame. The mid-bass speaker is installed on the first frame, the tweeter is installed on the second frame, and the filter is connected between the first frame and the second frame.

5. The coaxial speaker according to claim 4, characterized in that: The second frame is located in the middle of the first frame, the filter element has a first connecting edge arranged along the outer periphery of the filter element and a second connecting edge along the circumference of the avoidance hole, the first connecting edge is connected to the first frame, and the second connecting edge is connected to the second frame.

6. The coaxial speaker according to claim 5, characterized in that: A support member is connected between the first frame and the second frame for supporting the second frame, and the filter element is connected to the support member.

7. The coaxial speaker according to claim 5 or 6, characterized in that: The filter element comprises a flexible filter material and a frame, wherein the frame is connected between the first frame and the second frame, and the flexible filter material is connected to the frame.

8. The coaxial speaker according to claim 7, characterized in that: The material of the skeleton includes at least one of iron wire, steel wire, plastic and fiber.

9. The coaxial speaker according to any one of claims 1 to 8, characterized in that: The material of the filter element includes at least one of mesh cloth, non-woven fabric, cotton cloth and fiber cloth.

10. A sound producing device, characterized in that: The sound-producing device comprises the coaxial speaker as described in any one of claims 1-9.

Images