Forward coaxial loudspeaker

Abstract

The forward coaxial loudspeaker comprises a low-frequency unit, a high-frequency unit and a support, a low-frequency vibrating diaphragm is arranged on the upper wall of the low-frequency unit, the high-frequency unit is arranged above the low-frequency unit, a high-frequency vibrating diaphragm is arranged on the upper wall of the high-frequency unit, and the low-frequency vibrating diaphragm and the high-frequency vibrating diaphragm face the same direction and are coaxially arranged. The support extends from the low-frequency unit to the axis position of the low-frequency vibrating diaphragm and is attached to the low-frequency vibrating diaphragm, and the high-frequency unit is arranged on the upper wall of the support. The support is arranged between the low-frequency unit and the high-frequency unit, so that the low-frequency vibrating diaphragm and the high-frequency vibrating diaphragm of the low-frequency unit and the high-frequency unit are coaxially arranged and arranged in the same direction, good sound quality can be achieved with small size and thickness, the high-frequency unit and the low-frequency unit can be controlled separately, the resonance problem is reduced, and the sound quality is improved. The sound quality of the coaxial loudspeaker is improved, the control logic is simpler and more stable, and the coaxial arrangement enables the sound quality to be more stereoscopic.

Description

Technical Field

[0001] The present invention relates to the field of loudspeakers, in particular to a forward coaxial loudspeaker Background Art

[0002] Coaxial speakers are devices for high- and low-frequency sound signals. They consist of a single speaker capable of both high and low frequencies, effectively serving as two separate units. This means two speakers are mounted on the same axis, responsible for reproducing high frequencies and mid- and low-frequency frequencies, respectively. Furthermore, the diaphragms of these two speakers overlap, creating an ideal sound field for the reproduced music, as their physical positioning resembles a point sound source.

[0003] However, in the existing speaker design of wireless headphones, the coaxial speaker is affected by the headphone shell and its volume is relatively small, which in turn affects the volume of the coaxial speaker, so its sound quality will also decrease. Therefore, how to ensure the sound quality of the headphone without increasing the volume is the key to the design.

[0004] For example, Chinese patent 202110878961.2 realizes the independence of the first speaker unit and the second speaker unit through the base body, thereby improving the sound quality of the speaker. However, in actual production, the production cost of this special-shaped structure is relatively high, which affects the production of the speaker. At the same time, this structure also has limitations in smaller volumes.

[0005] Of course, there are also structures that use earphone shells to achieve independent high-frequency units and low-frequency units, such as Chinese patent 201610107713.7, but the sound holes are coaxially set, and for smaller earphones, the sound quality will also decrease. Summary of the Invention

[0006] The main purpose of the present invention is to propose a forward coaxial speaker, which aims to improve the speaker structure of existing wireless headphones, thereby achieving the independence of the high-frequency unit and the low-frequency unit, reducing its production cost while improving the frequency stability and increasing market share.

[0007] To achieve the above object, the present invention provides a forward coaxial loudspeaker, comprising:

[0008] A low-frequency unit, wherein a low-frequency diaphragm is provided on the upper wall of the low-frequency unit;

[0009] The high-frequency unit is arranged above the low-frequency unit, and a high-frequency diaphragm is arranged on the upper wall of the high-frequency unit.

[0010] The low-frequency diaphragm and the high-frequency diaphragm are oriented in the same direction and are coaxially arranged;

[0011] The bracket extends from the low-frequency unit to the axis position of the low-frequency diaphragm and fits together, and the high-frequency unit is arranged on the upper wall position of the bracket.

[0012] In the actual design, a bracket is set between the low-frequency unit and the high-frequency unit, so that the low-frequency diaphragm and the high-frequency diaphragm of the low-frequency unit and the high-frequency unit are coaxially set and in the same direction, so that better sound quality can be achieved with a smaller size and thickness, and the high-frequency unit and the low-frequency unit can be controlled separately, thereby reducing the resonance problem and improving the sound quality of the coaxial speaker. The control logic is simpler and more stable, and the role of the coaxial setting is to make the sound quality more three-dimensional, while also increasing the size of the low-frequency unit and the high-frequency unit without increasing the volume too much. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of the present invention;

[0014] Figure 2 Explosion of the present invention Figure 1 ;

[0015] Figure 3 Explosion of the present invention Figure 2 ;

[0016] Figure 4 This is a cross-sectional magnetic pole distribution diagram of the present invention;

[0017] Figure 5 It is a three-dimensional schematic diagram of the present invention;

[0018] Figure 6 It is a half-section schematic diagram of the present invention;

[0019] Figure 7 is a three-dimensional schematic diagram of the bracket;

[0020] Figure 8 This is a schematic diagram of the coordination between the low-frequency washer and the low-frequency housing;

[0021] Figure 9 It is a schematic diagram of the cross-sectional view of the low-frequency washer and the low-frequency shell;

[0022] Figure 10 Set up a magnetic flux comparison diagram for the low-frequency unit;

[0023] Figure 11 Set up the magnetic flux comparison plot for the high frequency unit.

[0024] In the figure,

[0025] 1 is the low frequency unit,

[0026] 11 is the low-frequency shell, 12 is the bottom washer, 13 is the low-frequency center lower magnet, 14 is the low-frequency center lower washer, 15 is the low-frequency center upper magnet, 16 is the low-frequency ring magnet, 17 is the low-frequency ring washer,

[0027] 18 is the low-frequency magnetic circuit gap, 19 is the low-frequency diaphragm, 101 is the low-frequency voice coil, 102 is the avoidance groove, 103 is the low-frequency welding foot,

[0028] 2 is the high frequency unit,

[0029] 21 is the high-frequency U iron, 22 is the high-frequency center magnet, 23 is the high-frequency ring magnet, 24 is the high-frequency diaphragm, 25 is the high-frequency center washer, 26 is the high-frequency voice coil, 27 is the high-frequency magnetic circuit gap,

[0030] 3 is a bracket, 30 is a magnetic frame, 31 is a positioning frame, 311 is a connecting portion, 312 is a supporting portion, 313 is a step portion, 4 is a notch,

[0031] 5 is the high-frequency soldering foot, 51 is the high-frequency cable, and 52 is the low-frequency cable. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] like Figures 1 to 11 As shown, a forward coaxial loudspeaker comprises:

[0036] A low-frequency unit 1, wherein a low-frequency diaphragm is provided on the upper wall of the low-frequency unit 1;

[0037] The high-frequency unit 2 is located above the low-frequency unit 1, and a high-frequency diaphragm 24 is provided on the upper wall of the high-frequency unit 2.

[0038] The low-frequency diaphragm and the high-frequency diaphragm 24 are oriented in the same direction and are coaxially arranged;

[0039] The bracket 3 extends from the low-frequency unit 1 to the axis of the low-frequency diaphragm and fits in with each other, and the high-frequency unit 2 is arranged on the upper wall of the bracket 3.

[0040] In the actual design, by arranging a bracket 3 between the low-frequency unit 1 and the high-frequency unit 2, the low-frequency diaphragm and the high-frequency diaphragm 24 of the low-frequency unit 1 and the high-frequency unit 2 are coaxially arranged and arranged in the same direction, so that better sound quality can be achieved with a smaller size and thickness, and the high-frequency unit 2 and the low-frequency unit 1 can be controlled separately, thereby reducing the resonance problem and improving the sound quality of the coaxial speaker. The control logic is simpler and more stable, and the role of the coaxial setting is to make the sound quality more three-dimensional, while also increasing the size of the low-frequency unit 1 and the high-frequency unit 2 without increasing the volume too much.

[0041] Specifically, the bracket 3 includes a magnetic conductive frame 30, which is provided on the top wall of the low-frequency diaphragm and the bottom wall of the high-frequency unit 2. The magnetic conductive frame 30 can apply a downward magnetic conductive force to the low-frequency magnetic circuit component of the low-frequency unit 1;

[0042] The magnetic conductive frame 30 can apply an upward magnetic conductive force to the high-frequency magnetic circuit components of the high-frequency unit 2 .

[0043] Different from the existing design, the magnetic conductive frame 30 is used as the base to form a magnetic field guidance for the low-frequency magnetic circuit component and the high-frequency magnetic circuit component, reducing the design of the washer between the high-frequency unit 2 and the low-frequency unit 1, and at the same time improving the magnetic product energy BL value of the low-frequency magnetic circuit component and the high-frequency magnetic circuit component.

[0044] For details, please refer to Figure 10 and Figure 11 ,

[0045] in Figure 10 The BL value changes of the dual-unit low-frequency unit 1 without and with the magnetic guide frame 30 are shown. The magnetic product energy BL value of the low-frequency unit 1 increases from 0.789 to 0.84 after the magnetic guide frame 30 is added.

[0046] in Figure 11 The BL value changes of the dual-unit high-frequency unit 2 before and after the magnetic conductive frame 30 is set are shown. The magnetic product energy BL value of the high-frequency unit 2 is increased from 0.234 to 0.267 after the magnetic conductive frame 30 is added.

[0047] Specifically, the magnetic conductive frame 30 is a hollow cylinder, and the bottom wall of the magnetic conductive frame 30 is in contact with the middle of the top wall of the low-frequency diaphragm.

[0048] Specifically, the bracket 3 further includes a positioning frame 31, and the positioning frame 31 includes a connecting portion 311 and a supporting portion 312 extending horizontally from the connecting portion 311. The lower end of the connecting portion 311 is arranged on the outer wall of the low-frequency unit.

[0049] Specifically, it is arranged on the outer wall of the low frequency bracket 3,

[0050] The bottom wall of the support portion 312 is in contact with the top wall of the magnetic guide frame 30 , and the top wall of the support portion 312 is in contact with the bottom wall of the high-frequency unit.

[0051] The positioning frame 31 is made of non-magnetic material. Specifically, the top wall of the support portion 312 is in contact with the bottom wall of the high-frequency U iron of the high-frequency unit, thereby improving the magnetic conductivity.

[0052] Specifically, the support portion 312 is provided with a step portion 313 extending into the hollow cylinder, and the support portion 312 and the magnetic frame 30 are fixed by glue or ultrasonic welding.

[0053] The bottom wall of the magnetic frame 30 is bonded to the low-frequency diaphragm by glue, and an inner groove is provided at the position where the low-frequency diaphragm and the magnetic frame 30 are bonded.

[0054] The connecting portion 311 is bonded to the low-frequency unit 1 via a slot.

[0055] The glue bonding method can effectively reduce resonance and play a role in vibration reduction. At the same time,

[0056] The setting of the step portion 313, the inner groove and the card slot effectively plays the role of support, precise positioning and stable installation, improves the coaxial setting effect, and at the same time makes assembly simpler, thereby improving production efficiency, reducing production costs, and at the same time causing little increase in volume.

[0057] Specifically, the low-frequency unit 1 includes a low-frequency housing 11, a bottom washer 12 provided at the bottom of the low-frequency housing 11, a low-frequency center lower magnet 13 provided in the middle of the bottom washer 12, a low-frequency center lower washer 14 provided on the upper wall of the low-frequency center lower magnet 13, a low-frequency center upper magnet 15 provided on the upper wall of the low-frequency center lower washer 14, a low-frequency annular magnet 16 provided on the inner wall of the low-frequency housing 11, and a low-frequency annular washer 17 provided on the upper wall of the low-frequency annular magnet 16.

[0058] A low-frequency magnetic circuit gap 18 is formed between the low-frequency lower magnet, the low-frequency upper magnet and the low-frequency annular magnet 16. The upper wall of the bracket 3 is provided with the low-frequency diaphragm 19. The low-frequency diaphragm 19 is provided with a low-frequency voice coil 101 extending into the low-frequency magnetic circuit gap 18.

[0059] The low frequency center upper magnet 15 is attached to the magnetic frame 30 through the low frequency voice coil 101.

[0060] The connecting portion 311 is installed on the side wall of the low-frequency housing 11. The low-frequency unit 1 is one of the embodiments.

[0061] Of course, it can also be improved according to the actual design.

[0062] That is, the low-frequency magnetic circuit component, the low-frequency voice coil 101 (driving component) and the vibration component (that is, the low-frequency diaphragm 19).

[0063] Specifically, the low-frequency housing 11 is made of plastic material, and the low-frequency housing 11 and the low-frequency ring washer are integrally injection-molded.

[0064] The low-frequency voice coil 101 is provided with two low-frequency welding feet which are integrally injection-molded.

[0065] The two low-frequency soldering feet are electrically connected to the positive terminal and the negative terminal of the low-frequency voice coil 101 respectively.

[0066] Specifically, the overall thickness of the low-frequency unit 1 can be reduced by the one-piece injection molding design. At the same time, the low-frequency ring washer and the low-frequency welding foot are injection molded as a whole, which can reduce resonance and assembly process.

[0067] At the same time, the structural stability is improved.

[0068] The low-frequency ring washer 17 can play a better supporting and magnetic conductive role.

[0069] Specifically, the low-frequency soldering feet and low-frequency ring washers are each formed by integrally injection-molding two offset sheets, stacked and then integrally formed. The low-frequency soldering feet are offset in height and radial directions, and then trimmed where they fit or connect. The two low-frequency ring washers are provided with two symmetrical escape grooves, with the upper ends of the low-frequency soldering feet positioned within the escape grooves.

[0070] Specifically, the high-frequency unit 2 includes a high-frequency U iron 21 with a high-frequency cavity, a high-frequency central magnet 22 provided in the high-frequency U iron 21, a high-frequency ring magnet 23 provided on the inner wall of the high-frequency U iron 21, and the high-frequency diaphragm 24 provided on the upper wall of the high-frequency U iron 21.

[0071] A high-frequency magnetic circuit gap 27 is provided between the high-frequency central magnet 22 and the high-frequency ring magnet 23;

[0072] The lower wall of the high-frequency diaphragm 24 is provided with a high-frequency center washer 25.

[0073] The high-frequency center washer 25 is in contact with the high-frequency diaphragm 24.

[0074] The bottom wall of the high-frequency center washer 25 is provided with a high-frequency voice coil 26, and the high-frequency voice coil 26 is tangent to the high-frequency magnetic circuit gap 27, that is, the high-frequency magnetic circuit component, the high-frequency voice coil 26 (driving component) and the vibration component (that is, the high-frequency diaphragm 24).

[0075] The high-frequency magnetic circuit gap is provided with an upward magnetic shear force. In another design, the Gaping center washer is set on the high-frequency diaphragm to change the design of the existing high-frequency unit, in which the high-frequency magnetic circuit gap is extremely small.

[0076] Specifically, the high-frequency center magnet 22 and the high-frequency ring magnet 23 are coaxial and arranged at the same height, and the high-frequency voice coil 26 is arranged above the high-frequency magnetic circuit gap 27, thereby ensuring uniform distribution of the magnetic flux direction.

[0077] Specifically, a notch 4 is provided on one side of the U iron, and two high-frequency welding feet 5 are provided on the notch 4 at intervals.

[0078] The two high-frequency soldering feet 5 are connected to the positive terminal and the negative terminal of the high-frequency voice coil 26 respectively.

[0079] The positioning frame 31 is used to install the high-frequency welding foot 5 and the high-frequency cable 51 and the low-frequency cable 52 of the low-frequency welding foot.

[0080] In the actual headphone speaker installation,

[0081] The position of the cable will also greatly affect the sound quality. Therefore, the arrangement of the positioning frame 31 can effectively avoid the resonance problem and improve the sound quality of the coaxial speaker.

[0082] The high-frequency magnetic circuit components (i.e., magnets and washers) and the low-frequency magnetic circuit components (i.e., magnets and washers) of the high-frequency unit 2 and the low-frequency unit 1 are coaxially arranged. The difference from the existing design lies in the arrangement of the magnetic guide frame 30. At the same time, the high-frequency unit 2 and the low-frequency unit 1 are preferably circular structures, but can also be elliptical structures.

[0083] The BL value, or electromechanical coupling coefficient, is an important parameter used in the field of acoustics to describe the performance of acoustic transducers such as speakers or microphones. It comprehensively considers the geometric dimensions of the magnetic circuit, the magnetic properties of the permanent magnet material, and the electrical parameters of the coil. The BL value is calculated as follows:

[0084] = × BL = B × L

[0085] Where B is the magnetic induction intensity and L is the effective length of the voice coil. In a loudspeaker, a high BL value indicates the use of high-performance permanent magnet materials and an appropriate coil length in the magnetic circuit design. This can more efficiently convert electrical energy into acoustic energy, thereby improving the speaker's sensitivity and power handling capability.

[0086] In practical applications, a larger BL value can enhance the driving force of the speaker, enabling it to produce a higher sound pressure level. At the same time, the BL value also affects the speaker's frequency response characteristics and distortion.

[0087] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A forward coaxial loudspeaker, characterized in that: include: A low-frequency unit, wherein a low-frequency diaphragm is provided on the upper wall of the low-frequency unit; The high-frequency unit is arranged above the low-frequency unit, and a high-frequency diaphragm is arranged on the upper wall of the high-frequency unit. The low-frequency diaphragm and the high-frequency diaphragm are oriented in the same direction and are coaxially arranged; A bracket, the bracket extending from the low-frequency unit to the axis of the low-frequency diaphragm and being in contact with each other, and the high-frequency unit is arranged on the upper wall of the bracket; The bracket includes a magnetic conductive frame, which is arranged on the top wall of the low-frequency diaphragm and the bottom wall of the high-frequency unit. The magnetic conductive frame can apply a downward magnetic conductive force to the low-frequency magnetic circuit component of the low-frequency unit; The magnetic conductive frame can apply an upward magnetic conductive force to the high-frequency magnetic circuit component of the high-frequency unit.

2. The forward coaxial loudspeaker according to claim 1, wherein: The magnetic conductive frame is a hollow cylinder, and the bottom wall of the magnetic conductive frame is in contact with the middle of the top wall of the low-frequency diaphragm.

3. The forward coaxial loudspeaker according to claim 2, wherein: The bracket further includes a positioning frame, which includes a connecting portion and a supporting portion horizontally extending from the connecting portion. The lower end of the connecting portion is arranged on the outer wall of the low-frequency unit.

4. The forward coaxial loudspeaker according to claim 3, wherein: The support portion is provided with a step portion extending into the hollow column, and the support portion and the magnetic frame are fixed by glue or ultrasonic welding. The bottom wall of the magnetic frame is bonded to the low-frequency diaphragm by glue, and an inner groove is provided at the position where the low-frequency diaphragm and the magnetic frame are bonded. The connecting portion is bonded to the low-frequency unit via a slot.

5. The forward coaxial loudspeaker according to claim 3, wherein: The low-frequency unit includes a low-frequency housing, a bottom washer arranged at the bottom of the low-frequency housing, a low-frequency center lower magnet arranged in the middle of the bottom washer, a low-frequency center lower washer arranged on the upper wall of the low-frequency center lower magnet, a low-frequency center upper magnet arranged on the upper wall of the low-frequency center lower washer, a low-frequency annular magnet arranged on the inner wall of the low-frequency housing, and a low-frequency annular washer arranged on the upper wall of the low-frequency annular magnet. A low-frequency magnetic circuit gap is formed between the low-frequency lower magnet, the low-frequency upper magnet and the low-frequency annular magnet; the low-frequency diaphragm is provided on the upper wall of the bracket; and the low-frequency diaphragm is provided with a low-frequency voice coil extending into the low-frequency magnetic circuit gap; The low-frequency center upper magnet is fitted with the magnetic frame through the low-frequency voice coil. The connecting portion is installed on the side wall of the low-frequency housing.

6. The forward coaxial loudspeaker according to claim 5, wherein: The low-frequency housing is made of plastic material, and the low-frequency housing and the low-frequency ring washer are integrally injection-molded. The low-frequency voice coil is provided with two low-frequency welding feet which are integrally injection-molded. The two low-frequency ring washers are provided with two symmetrical avoidance grooves. The upper ends of the low-frequency welding feet are located at the position of the avoidance grooves. The two low-frequency welding feet are electrically connected to the positive terminal and the negative terminal of the low-frequency voice coil respectively.

7. The forward coaxial loudspeaker according to claim 6, wherein: The low-frequency welding foot and the low-frequency ring washer are respectively formed by integrally injecting two sheets after staggered superposition. The low-frequency welding foot is staggered in height direction and radial direction.

8. The forward coaxial loudspeaker according to claim 5, wherein: The high-frequency unit includes a high-frequency U iron with a high-frequency cavity, a high-frequency central magnet arranged in the high-frequency U iron, a high-frequency ring magnet arranged on the inner wall of the high-frequency U iron, and the high-frequency diaphragm arranged on the upper wall of the high-frequency U iron. A high-frequency magnetic circuit gap is provided between the high-frequency center magnet and the high-frequency ring magnet, and the high-frequency magnetic circuit gap is provided with an upward magnetic shear force; a high-frequency center washer is provided on the lower wall of the high-frequency diaphragm, and the high-frequency center washer is in contact with the high-frequency diaphragm, and a high-frequency voice coil is provided on the bottom wall of the high-frequency center washer, and the high-frequency voice coil is tangent to the high-frequency magnetic circuit gap.

9. The forward coaxial loudspeaker according to claim 8, wherein: The high-frequency center magnet and the high-frequency ring magnet are coaxial and arranged at the same height, and the high-frequency voice coil is arranged above the high-frequency magnetic circuit gap.

10. The forward coaxial loudspeaker according to claim 8, wherein: A notch is provided on one side of the U iron, and two high-frequency welding feet are provided in the notch. The two high-frequency soldering feet are connected to the positive and negative terminals of the high-frequency voice coil respectively. The positioning frame is used for installing high-frequency cables and low-frequency cables of high-frequency welding feet and low-frequency welding feet.

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