Coaxial loudspeaker with common magnetic circuit

Abstract

The utility model discloses a kind of coaxial loudspeakers of magnetic circuit sharing, the utility model technical scheme includes support structure and high-low sound co-locating structure, its core is in the high-low sound co-locating structure has adopted unique magnetic conduction matrix design.The top and bottom of the magnetic conduction matrix are equipped with coaxial first placement part and second placement part, respectively for accommodating high-pitched component and bass component, and with it jointly constitute magnetic circuit cooperation.The utility model realizes the conjugation and integration of high-low sound magnetic circuit by a magnetic conduction matrix, saves the independent magnetic circuit stacking in traditional scheme, significantly reduces the axial dimension of loudspeaker, makes its structure more compact, while ensuring that high-low sound unit is in same axis, realizes common point sound source output, improves tone performance.The utility model has the beneficial effect of low use height.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker technology, and in particular to a coaxial loudspeaker with a shared magnetic circuit. Background Technology

[0002] Coaxial loudspeakers, by placing the tweeter and woofer on a common axis, enable point source sound production, improving sound quality and sound field performance, and have become an important component of high-end audio equipment.

[0003] In current technology, reducing the height of loudspeakers is a key design focus, often achieved through optimized magnetic circuit design. This also helps improve issues like harmonic distortion. Traditional coaxial loudspeakers typically use stacked, independent magnetic circuit systems for the tweeter and woofer. While this layout achieves basic coaxial sound production, it inevitably increases the speaker's axial height. This clearly contradicts the current trend towards ultra-thin and lightweight consumer electronics. Existing technologies, requiring stacked independent magnetic circuits and additional insulating rings for assembly, result in excessively large axial dimensions and a high usable height. Utility Model Content

[0004] The main purpose of this invention is to propose a coaxial loudspeaker with a shared magnetic circuit, aiming to solve the technical problems of high usage in existing technologies.

[0005] To achieve the above objectives, this utility model proposes a coaxial loudspeaker with a shared magnetic circuit, including a support structure and a high-low frequency co-location structure. The support structure has an accommodating chamber with an opening on one side. The high-low frequency co-location structure is located in the accommodating chamber and includes a tweeter component, a woofer component, and a magnetic conductive substrate. The top and bottom of the magnetic conductive substrate are respectively provided with a first placement part and a second placement part on the same axis. The first placement part and the second placement part are configured to accommodate the tweeter component and the woofer component and form a magnetic circuit cooperation.

[0006] Furthermore, the tweeter assembly includes a tweeter magnet and a tweeter washer, the tweeter magnet being fixedly connected to the tweeter washer, the tweeter magnet being disposed in the first placement part, and the tweeter washer being disposed on top of the tweeter magnet; the woofer assembly includes a woofer magnet and a woofer washer, the woofer magnet being fixedly connected to the woofer washer, the woofer magnet being disposed in the second placement part, and the woofer washer being disposed at the bottom of the woofer magnet.

[0007] Furthermore, the first placement part and the second placement part are groove structures, with the first placement part and the second placement part recessed inward. The recess depth of the first placement part is sufficient to accommodate the tweeter magnet and the tweeter washer, while the recess depth of the second placement part is sufficient to accommodate the woofer magnet and the woofer washer.

[0008] Furthermore, the tweeter assembly also includes a tweeter voice coil disposed above the tweeter washer, and a first magnetic gap is defined between the magnetic substrate and the tweeter magnet and the tweeter washer throughout the lateral extension direction, with the tweeter voice coil at least partially disposed in the first magnetic gap; the woofer assembly also includes a woofer voice coil disposed below the woofer, and a second magnetic gap is defined between the magnetic substrate and the woofer magnet and the woofer throughout the lateral extension direction, with the woofer voice coil at least partially disposed in the second magnetic gap.

[0009] Furthermore, the side of the second placement part is provided with a stroke groove for the bass voice coil stroke, and the stroke groove is formed by the indentation of the guide magnet substrate.

[0010] Furthermore, a dust cover is provided below the bass voice coil, and a receiving groove is provided on the side of the dust cover. The receiving groove is configured to limit the bottom line of the position below the bass voice coil during the stroke of the bass voice coil.

[0011] Furthermore, it also includes a front cover structure, which covers the magnetic substrate. The front cover structure has a cover body in the middle and a diaphragm below the cover body. The front cover structure has a limiting post above the side of the diaphragm, and the limiting post abuts against the side of the diaphragm from above.

[0012] Furthermore, the front cover structure also includes an adhesive overflow channel, which is located inside the front cover structure.

[0013] Furthermore, the front cover structure has a port on the side for installing the voice coil nylon wire.

[0014] Furthermore, a dustproof net is provided between the support structure and the front cover structure.

[0015] This utility model's technical solution includes a support structure and a co-located tweeter and woofer structure. Its core lies in the unique magnetic substrate design employed in the co-located tweeter and woofer structure. The top and bottom of this magnetic substrate are provided with a coaxial first placement portion and a second placement portion, respectively used to accommodate the tweeter and woofer components, forming a magnetic circuit together. This utility model achieves conjugation and integration of the tweeter and woofer magnetic circuits through a single magnetic substrate, eliminating the need for independent magnetic circuit stacking in traditional solutions. This significantly reduces the axial dimension of the speaker, making its structure more compact, while ensuring that the tweeter and woofer units are on the same axis, achieving common-point sound source output and improving sound quality. This utility model also has the advantage of low operating height. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a partially exploded three-dimensional structural diagram of the present invention;

[0018] Figure 3This is a cross-sectional view of the present invention;

[0019] Figure 4 This is a partially exploded sectional view of the present invention;

[0020] Figure 5 This is a schematic diagram showing the fit between the magnetic substrate and the front cover structure;

[0021] Figure 6 A cross-sectional view of the structure with both high and low frequencies combined;

[0022] Figure 7 This is a cross-sectional view of the magnetically conductive substrate;

[0023] Figure 8 This is a sectional view of the front cover structure;

[0024] Figure 9 This is a three-dimensional structural diagram of the front cover.

[0025] The above figures include the following reference numerals:

[0026] 1. Support structure; 11. Bass frame; 12. Bracket; 121. Receiving chamber; 2. Co-location structure for tweeter and woofer; 21. Tweeter assembly; 211. Tweeter magnet; 212. Tweeter washer; 213. Tweeter voice coil; 214. Diaphragm; 22. Woofer assembly; 221. Woofer magnet; 222. Woofer washer; 223. Woofer voice coil; 23. Magnetic substrate; 231. First placement part; 232. Second placement part; 2321. Punch 3. Front cover structure; 31. Cover body; 32. Limiting post; 33. Through port; 34. Glue overflow groove; 4. Connecting part; 41. Connecting post; 411. Inner wall of post; 412. Bottom wall of post; 42. Connecting groove; 421. Side wall of groove; 422. Bottom wall of groove; 51. First magnetic gap; 52. Second magnetic gap; 6. Dust cover; 61. Receiving groove; 7. Dustproof net; 81. Drum paper; 82. Spring; 83. Metal ring; 84. Gasket. Detailed Implementation

[0027] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0028] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0029] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0030] This utility model proposes a coaxial loudspeaker with shared magnetic circuit. This application is one of a series of applications, and focuses on protecting the high and low frequency co-located structure 2.

[0031] In this embodiment of the utility model, such as Figures 1 to 9 As shown, the coaxial loudspeaker includes a support structure 1, a tweeter / woofer co-location structure 2, and a front cover structure 3. The tweeter / woofer co-location structure 2 is located inside the support structure 1 and includes a tweeter assembly 21, a woofer assembly 22, and a magnetic substrate 23. The magnetic substrate 23 has a coaxial first placement portion 231 and a second placement portion 232 at its top and bottom, respectively. The first placement portion 231 and the second placement portion 232 are configured to accommodate the tweeter assembly 21 and the woofer assembly 22 and form a magnetic circuit connection. The front cover structure 3 covers the magnetic substrate 23. The side of the front cover structure 3 and the side of the magnetic substrate 23 cooperate to form a connecting portion 4. The connecting portion 4 is configured as a mating structure where one side of the front cover structure 3 protrudes and the other side of the magnetic substrate 23 is recessed, to achieve a mating connection.

[0032] It should be noted beforehand that the support structure 1 refers to the speaker housing, and it can be understood that the speaker housing also has a corresponding structure inside for connecting internal parts. The specific content of the support structure 1 is not limited in this utility model. Near the end, a support structure 1 is shown to aid in understanding the co-location structure 2 for high and low frequencies and the front cover structure 3. However, this invention does not use this shown embodiment to define the scope of protection, but only for reference. The support structure 1 can also be applied to this invention using existing technology. As mentioned above, the focus of this invention is on the co-location structure 2 for high and low frequencies and the front cover structure 3. The core of the co-location structure 2 is that the tweeter component 21 and the woofer component 22 share a single magnetic substrate 23. Specifically, the co-location structure 2 achieves this by using the coaxial design of the first placement part 231 and the second placement part 232 to allow the tweeter component 21 and the woofer component 22 to share the upper and lower ends of a portion of the magnetic substrate 23, thereby reducing the axial dimension of the speaker. It should be explained that in this process, the volume of the magnetic substrate 23 is also correspondingly reduced, thereby reducing inductance and harmonic distortion. Front cover structure The core of design 3 lies in the design of the connecting part 4, which directly connects the front cover structure 3 and the magnetic substrate 23, eliminating the need for the insulating ring component typically required in the prior art. It should be explained that in the prior art, coaxial speakers require an insulating ring to isolate the magnetic substrate 23 and the diaphragm 214. This invention is a concept proposed to eliminate the insulating ring, and the connecting part 4 avoids this situation. After eliminating the insulating ring, the axial dimension of the speaker will also decrease, and the reduction in height will bring about the technical effect of enhanced high-frequency extension (i.e., improved sound quality). It should be noted that in some embodiments of this invention, the front cover structure 3 and the magnetic substrate 23 do not include the connecting part 4. In this case, the content of the specification is only for public disclosure purposes. In addition, the dustproof mesh 7 mentioned later is also installed for this purpose (improving high-frequency extension). This invention has the beneficial technical effect of better high-frequency extension due to the significant reduction in the height of use.

[0033] It is also worth mentioning that the specific connection relationship in this utility model is generally adhesive bonding. Adhesive bonding is a common connection method in the prior art for speaker assembly. Adhesive bonding is a preferred solution with many advantages, such as good sealing performance, wide applicability, and low cost. Of course, the connection relationship in this utility model is not limited to adhesive bonding. For metal parts, welding-type connection methods can also be used, and for non-metal parts, snap-fit ​​connection can also be used. This explanation is only for a clearer understanding of the technical solution of this utility model. Since the connection relationship of each component in this utility model is not within the scope of protection, the specific connection relationship is not limited. More speaker connection methods can be found in the prior art.

[0034] In some embodiments of this utility model, the tweeter assembly 21 includes a tweeter magnet 211 and a tweeter washer 212, the tweeter magnet 211 and the tweeter washer 212 are fixedly connected, the tweeter magnet 211 is disposed in the first placement part 231, and the tweeter washer 212 is disposed on the top of the tweeter magnet 211; the woofer assembly 22 includes a woofer magnet 221 and a woofer washer 222, the woofer magnet 221 and the woofer washer 222 are fixedly connected, the woofer magnet 221 is disposed in the second placement part 232, and the woofer washer 222 is disposed at the bottom of the woofer magnet 221.

[0035] Specifically, in order to minimize the volume of the magnetic substrate 23, a specific structure for the magnetic substrate 23 is proposed. The first placement portion 231 and the second placement portion 232 are groove structures. The first placement portion 231 and the second placement portion 232 are recessed inward. The recess depth of the first placement portion 231 is sufficient to accommodate the tweeter magnet 211 and the tweeter washer 212, while the recess depth of the second placement portion 232 is sufficient to accommodate the woofer magnet 221 and the woofer washer 222. Understandably, in actual manufacturing, it is possible to consider making the top of the tweeter washer 212 flush with the top of the first placement portion 231, and the bottom of the woofer washer 222 flush with the top (i.e., below) of the second placement portion 232.

[0036] Specifically, the tweeter assembly 21 further includes a tweeter voice coil 213, which is positioned above the tweeter washer 212. A first magnetic gap 51 is defined between the magnetic substrate 23 and the tweeter magnet 211 and the tweeter washer 212 along the entire lateral extension direction. The tweeter voice coil 213 is at least partially disposed within the first magnetic gap 51. The woofer assembly 22 also includes a woofer voice coil 223, which is positioned below the woofer washer 222. A second magnetic gap 52 is defined between the magnetic substrate 23 and the woofer magnet 221 and the woofer washer 222 along the entire lateral extension direction. The woofer voice coil 223 is at least partially disposed within the second magnetic gap 52. It should be explained that the tweeter voice coil 213 and the woofer voice coil 223 function to cut the magnetic field and generate force. The aforementioned first magnetic gap 51 and second magnetic gap 52 are provided to stabilize the cutting of the magnetic field by the tweeter voice coil 213 and the woofer voice coil 223.

[0037] More specifically, since the stroke of the bass voice coil 223 is greater than that of the bass voice coil 213, a stroke groove 2321 is provided on the side of the second placement part 232. The stroke groove 2321 is formed by a recess in the guide magnet substrate 23. With the stroke groove 2321, the bass voice coil 223 can avoid bottoming out during the active stroke, thereby extending the service life of the product.

[0038] Specifically, the front cover structure 3 has a cover body 31 in the middle, a diaphragm 214 above the tweeter voice coil 213, the diaphragm 214 is located below the cover body 31, and the front cover structure 3 also has a limiting post 32 above the side of the diaphragm 214. The limiting post 32 abuts against the side of the diaphragm 214 from above. The function of the limiting post 32 is to limit the position of the diaphragm 214 and prevent displacement.

[0039] Specifically, a dust cover 6 is provided below the bass voice coil 223, and a receiving groove 61 is provided on the side of the dust cover 6. The receiving groove 61 is configured to limit the bottom line of the position below the bass voice coil 223 during the stroke of the bass voice coil 223. More specifically, refer to Figure 3 According to the content, the shape of the receiving groove 61 is similar to a V-shape. When the bass voice coil 223 is at a low position during the process of cutting the magnetic field, its bottom abuts against the bottom of the receiving groove 61, and its horizontal movement is restricted by the two sides of the V-shaped receiving groove 61. At the same time, the receiving groove 61 also limits the location of the lowest point.

[0040] In some embodiments of this utility model, the connecting part 4 includes a connecting post 41 formed by the side of the front cover structure 3 and a connecting groove 42 formed by the side of the magnetic conductive substrate 23. The connecting post 41 abuts against the connecting groove 42 to form a mating connection. At the same time, the connecting groove 42 is laterally open in the direction of the connecting post 41. The purpose of the lateral opening is to facilitate the mating installation of the connecting post 41 and the connecting groove 42. Moreover, the open structure can further reduce the volume of the magnetic conductive substrate 23, thereby improving the phenomenon of harmonic distortion and improving the sound quality. It can be understood that in some other embodiments of this utility model, the connecting part 4 can also be assembled by forming a groove by the side of the front cover structure 3 and forming a post by the side of the magnetic conductive substrate 23. Since the structure is similar, it will not be described in detail.

[0041] Specifically, the connecting column 41 includes an inner wall 411 and a bottom wall 412, and the connecting groove 42 includes a side wall 421 and a bottom wall 422. The inner wall 411 and the side wall 421 abut against each other, and the bottom wall 412 and the bottom wall 422 abut against each other.

[0042] In some embodiments of this utility model, in conjunction with the foregoing, a structure for facilitating the installation of the voice coil wire is also proposed. The front cover structure 3 has a through-hole 33 on its side for installing the voice coil wire. During actual assembly, the voice coil wire is led out through the through-hole 33. This utility model guides the voice coil wire through the through-hole 33, ensuring that the voice coil wire is led out from the corresponding working surface on the front cover structure 3, avoiding contact between the voice coil wire and metal, thereby preventing short circuits in the product due to the voice coil wire.

[0043] Specifically, the front cover structure 3 is provided with an overflow groove 34 in the direction of the connecting post 41 toward its own interior. It is understandable that overflow problems will inevitably occur during the assembly process of this utility model. By setting the overflow groove 34, the overflow defect rate can be reduced, thereby improving product quality. More specifically, the overflow groove 34 is located between the limiting post 32 and the connecting post 41.

[0044] In some embodiments of this utility model, in conjunction with the aforementioned high and low frequency co-location structure 2 and front cover structure 3, the high frequency extension is improved by reducing the axial dimension of the speaker. A dustproof mesh 7 is provided between the support structure 1 and the front cover structure 3. The function of the dustproof mesh 7 is also to improve the high frequency extension, ultimately improving the sound quality of the speaker.

[0045] In some embodiments of this utility model, the support structure 1 includes a basin frame 11 and a bracket 12. The basin frame 11 and the bracket 12 are snapped together by their respective sides. The bracket 12 includes a receiving chamber 121. The aforementioned high and low frequency co-positioning structure 2 is installed inside the receiving chamber 121. The top of the receiving chamber 121 is covered by the aforementioned front cover structure 3. The basin frame 11 and the bracket 12 are also equipped with some basic components that can be understood by those skilled in the art. These components are not included in the protection scope of this utility model. They are only shown to fully outline the structure of the standard product. In fact, these basic components can be assembled by those skilled in the art through their own professional knowledge. They are only used as a reference here. First, the basin frame 11 and the support 12 are internally equipped with a paper drum 81. After the paper drum 81 is glued to the basin frame 11, the support 12 is placed on the basin frame 11 for fixation. Second, a spring 82 is also assembled and is also glued to the basin frame 11 for installation. In addition, a metal ring 83 is provided between the paper drum 81 and the spring 82. It should be noted that the metal ring 83 is actually a relatively optional component and can be omitted from actual assembly. Finally, gaskets 84 are provided on the bottom of both sides of the outside of the basin frame 11.

[0046] The following lists the preferred materials for some important components: Magnet: Neodymium iron boron; Metal ring: Aluminum-magnesium alloy; Diaphragm: Metal diaphragm body with silk edge, or silk diaphragm; Plastic bracket: ABS material or PP, PC material, etc.; Magnetic substrate: Low carbon steel; Washer: Low carbon steel; Sponge: Fabric; Drum: Fabric edge, rubber edge, or foam edge + paper body or other material body.

[0047] The following are some examples of applications of this invention. For instance, the speaker can be installed on the door of a car to reduce the space occupied by the speaker on the door; in addition, the speaker can be installed indoors to reduce the installation depth.

[0048] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A coaxial loudspeaker with shared magnetic circuit, comprising a support structure and a high / low frequency co-location structure, wherein the support structure has an opening on one side of an accommodating chamber, and the high / low frequency co-location structure is disposed within the accommodating chamber, characterized in that: The high-low frequency co-location structure includes a tweeter component, a woofer component, and a magnetic substrate. The top and bottom of the magnetic substrate are respectively provided with a first placement part and a second placement part on the same axis. The first placement part and the second placement part are configured to accommodate the tweeter component and the woofer component and form a magnetic circuit cooperation.

2. The coaxial loudspeaker as described in claim 1, characterized in that: The tweeter assembly includes a tweeter magnet and a tweeter washer, the tweeter magnet and the tweeter washer are fixedly connected, the tweeter magnet is located in the first placement part, and the tweeter washer is located on top of the tweeter magnet; the woofer assembly includes a woofer magnet and a woofer washer, the woofer magnet and the woofer are fixedly connected, the woofer magnet is located in the second placement part, and the woofer washer is located at the bottom of the woofer magnet.

3. The coaxial loudspeaker as described in claim 2, characterized in that: The first placement part and the second placement part are groove structures, with the first placement part and the second placement part recessed inward. The recess depth of the first placement part is sufficient to accommodate the tweeter magnet and the tweeter washer, while the recess depth of the second placement part is sufficient to accommodate the woofer magnet and the woofer washer.

4. The coaxial loudspeaker as described in claim 3, characterized in that: The tweeter assembly also includes a tweeter voice coil disposed above the tweeter washer. A first magnetic gap is defined between the magnetic substrate, the tweeter magnet, and the tweeter washer along the entire lateral extension direction. The tweeter voice coil is at least partially disposed in the first magnetic gap. The woofer assembly also includes a woofer voice coil disposed below the woofer. A second magnetic gap is defined between the magnetic substrate, the woofer magnet, and the woofer along the entire lateral extension direction. The woofer voice coil is at least partially disposed in the second magnetic gap.

5. The coaxial loudspeaker as described in claim 4, characterized in that: The second placement part has a stroke groove on its side for supplying the bass voice coil stroke, and the stroke groove is formed by the indentation of the guide magnet substrate.

6. The coaxial loudspeaker as described in claim 4, characterized in that: A dust cover is provided below the bass voice coil, and a receiving groove is provided on the side of the dust cover. The receiving groove is configured to limit the bottom line of the position below the bass voice coil during the stroke of the bass voice coil.

7. The coaxial loudspeaker as described in claim 1, characterized in that: It also includes a front cover structure, which covers the magnetic substrate. The front cover structure has a cover body in the middle and a diaphragm below the cover body. The front cover structure has a limiting post above the side of the diaphragm, and the limiting post abuts against the side of the diaphragm from above.

8. The coaxial loudspeaker as described in claim 7, characterized in that: The front cover structure also includes an adhesive overflow channel, which is located inside the front cover structure.

9. The coaxial loudspeaker as described in claim 7, characterized in that: The front cover structure has a port on the side for installing the voice coil nylon wire.

10. The coaxial loudspeaker as described in claim 7, characterized in that: A dustproof net is installed between the top of the support structure and the front cover structure.

Images