A tweeter

Abstract

The present invention discloses a tweeter loudspeaker, which includes a magnetic circuit unit and a vibration unit. The magnetic circuit unit includes a pair of magnets and a pair of magnetic conductive plates. The pair of magnets are arranged in parallel and have the same magnetic pole direction. The pair of magnetic conductive plates are arranged on the inner side of the pair of magnets. A voice coil space is formed between the pair of magnetic conductive plates. The vibration unit includes a diaphragm and a voice coil. The diaphragm is arranged horizontally above the magnetic circuit unit. The voice coil is long and narrow. The axis of the voice coil is perpendicular to the diaphragm. One end of the voice coil is connected to the diaphragm, and the other end of the voice coil is placed in the voice coil space. The present invention constructs a voice coil space in the magnetic circuit unit and forms a closed magnetic line of force. The voice coil is made into a long and narrow shape and placed in the voice coil space. The diaphragm is driven by the magnetic circuit unit to vibrate and emit high-frequency sound. The structure makes the loudspeaker long and narrow, so that when it is installed in an electronic device, the diaphragm of the tweeter loudspeaker can be directly facing the sound outlet or the listening position, reducing the attenuation of the sound during the propagation process and improving the sound quality.

Description

Technical Field

[0001] The invention relates to the technical field of loudspeakers, and in particular to a tweeter loudspeaker used in electronic equipment. Background Art

[0002] The tweeter is an important component of the audio system of electronic equipment. It is responsible for generating and amplifying high-frequency sound signals, making the sound bright and penetrating, bringing users a clearer, more delicate and richer listening experience.

[0003] In order to meet the needs of portable electronic devices such as mobile phones, traditional speakers usually adopt a flat and lightweight design to save space and reduce weight. Figure 1 As shown, the magnetic circuit unit 130' is located in the voice coil 140', driving the voice coil to vibrate, thereby causing the diaphragm to produce sound.

[0004] However, for tweeters, the sound emitted by tweeters has a higher frequency, and these high-frequency sound waves are easily attenuated during propagation. Therefore, the flat design does not meet the needs of tweeters. It also proposes how to make the diaphragm of the tweeter directly face the sound outlet or listening position to reduce the attenuation of sound during propagation and ensure that the treble part can be clearly conveyed to the audience. Summary of the invention

[0005] The object of the present invention is to provide a tweeter speaker, aiming to make the diaphragm direction of the tweeter speaker consistent with the direction of the sound outlet in the flat device.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A tweeter loudspeaker, comprising:

[0008] A magnetic circuit unit, the magnetic circuit unit comprising a pair of magnets and a pair of magnetic conductive plates, the pair of magnets being arranged in parallel and having the same magnetic pole direction, the pair of magnetic conductive plates being arranged on the inner sides of the pair of magnets, and a voice coil space being formed between the pair of magnetic conductive plates;

[0009] A vibration unit, the vibration unit comprising a diaphragm and a voice coil, the diaphragm is horizontally arranged above the magnetic circuit unit, the voice coil is long and narrow, the axis of the voice coil is perpendicular to the diaphragm, one end of the voice coil is connected to the diaphragm, and the other end of the voice coil is placed in the voice coil space;

[0010] The upper and lower sides of the pair of magnetic conductive plates facing each other are thinned to form a concentrated magnetic conductive portion in the middle. The concentrated magnetic conductive portion is arranged corresponding to the position of the voice coil, and the height of the concentrated magnetic conductive portion is adapted to the stroke of the voice coil.

[0011] Preferably, it also includes a U-cup, wherein the U-cup has a pair of mounting slots running through it along its length direction, and clamping parts are formed on both sides of the magnetic conductive plate, and the pair of magnetic conductive plates are clamped one by one in the mounting slots through their respective clamping parts.

[0012] Preferably, the height of the upper edge of the side wall of the U cup is higher than the height of the magnetic circuit unit to form a diaphragm support for supporting the diaphragm, and the upper edge of the magnetic conductive plate forms a corresponding raised portion for filling the installation slot.

[0013] Preferably, the height of the diaphragm support is 0.3-0.5 mm.

[0014] Preferably, the clamping portion and the mounting notch are fixed by welding.

[0015] Preferably, it further comprises a PCB board connected to the lead of the voice coil, at least one end of the bottom side of the U cup forms a mounting notch which is in communication with the inner cavity of the U cup, and the PCB board is installed in the mounting notch.

[0016] Preferably, the pin ends of the PCB board correspond to the external settings of the U cup.

[0017] Preferably, a reserved expansion space is provided between the lower end of the magnetic conductive plate and the bottom of the inner cavity of the U cup, and the height of the reserved expansion space is 1-3 mm.

[0018] Preferably, the voice coil comprises a voice coil frame and an enameled wire wound on the voice coil frame, the voice coil frame is a solid lightweight hard tube, and the enameled wire is wound on the voice coil frame in a single layer or multiple layers.

[0019] After adopting the above technical solution, the present invention has the following advantages compared with the background technology:

[0020] 1. The present invention changes the shape and magnetic circuit structure of the traditional loudspeaker. The present invention constructs a voice coil space in the magnetic circuit unit and forms a closed magnetic line of force. The voice coil is made into a narrow and long shape and placed in the voice coil space. It is driven by the magnetic circuit unit, and then drives the diaphragm to vibrate and emit high-frequency sound. This structure makes the loudspeaker have a long and narrow shape with a large thickness but a thin width. Therefore, when installed in an electronic device, the diaphragm of the tweeter can directly face the sound outlet or the listening position, thereby reducing the attenuation of sound during the propagation process and improving the sound quality.

[0021] 2. Aiming at the short stroke of the tweeter diaphragm, the present invention provides a concentrated magnetic conductive part in the magnetic conductive plate to concentrate the magnetic field around the voice coil, forming a uniform and strong magnetic field environment, ensuring that the magnetic field generated by the magnet can flow along a predetermined path, which helps the voice coil to generate stable and efficient vibration when driven by an audio signal.

[0022] 3. The present invention makes it easy to install the magnetic conductive plate through the design of the installation slot, and fixes the magnetic conductive plate by welding, which simplifies the product structure and reduces the difficulty of assembly operation; at the same time, the installation slot also lengthens the suspension length of the voice coil lead, making the suspension wire less likely to break, and allows the voice coil to dissipate heat well without the need for magnetic fluid.

[0023] 4. The present invention increases the height of the U cup and uses the U cup to replace the basin frame as the diaphragm support, thereby further simplifying the product structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 For an existing flat speaker;

[0025] Figure 2 This is a schematic diagram of the assembly of the tweeter speaker of this application;

[0026] Figure 3 This is another schematic diagram of the assembly of the tweeter speaker of the present application;

[0027] Figure 4 This is a disassembly diagram of the tweeter speaker of the present application;

[0028] Figure 5 This is a schematic diagram of the installation of the magnetic conductive plate and U cup of the tweeter speaker of this application;

[0029] Figure 6 A cross-sectional view of the tweeter of the present application along the width direction;

[0030] Figure 7 A cross-sectional view of the tweeter of the present application along the length direction;

[0031] Figure 8 A schematic diagram of the magnetic field of the tweeter of this application;

[0032] Fig. 9 A schematic diagram of a magnetic conductive plate of a tweeter loudspeaker of the present application;

[0033] Fig.10 Schematic diagram of the voice coil of the tweeter of this application.

[0034] Description of reference numerals:

[0035] 110, magnet; 120, magnetic conductive plate; 121, concentrated magnetic conductive portion; 122, heightened portion; 123, voice coil space; 124, clamping portion;

[0036] 130, diaphragm; 140, voice coil; 141, voice coil frame; 142, enameled wire;

[0037] 150, U cup; 151, installation notch; 152, diaphragm support; 153, installation notch;

[0038] 160. PCB board. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention 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 invention and are not intended to limit the present invention. In addition, it should be noted that:

[0040] The terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0041] When an element is referred to as being “fixed to” or “disposed on” or “provided on” another element, it may 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 may be directly connected to the other element or indirectly connected to the other element.

[0042] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances. Example

[0043] Please refer to Figure 2-Figure 4 As shown, the present invention discloses a tweeter loudspeaker, which comprises a magnetic circuit unit and a vibration unit. The vibration unit vibrates and emits sound under the excitation of the magnetic circuit unit.

[0044] The magnetic circuit unit includes a pair of magnets 110 and a pair of magnetic conductive plates 120. The pair of magnets 110 are tile magnets, arranged in parallel and with the same magnetic pole direction. The pair of magnetic conductive plates 120 are arranged on the inner side of the pair of magnets 110 to conduct magnetism to the magnets 110 to form a uniform magnetic field. At the same time, a voice coil space 123 for placing the voice coil 140 is formed between the pair of magnetic conductive plates 120.

[0045] The vibration unit includes a diaphragm 130 and a voice coil 140. The diaphragm 130 is horizontally arranged above the magnetic circuit unit, and the voice coil 140 is long and narrow. The axis of the voice coil 140 is arranged perpendicular to the diaphragm 130. In other words, the axis direction of the voice coil 140 is consistent with the vibration direction of the diaphragm 130. This arrangement direction improves the force on the voice coil 140, so that the voice coil 140 can be either a single-layer voice coil or a multi-layer voice coil. At the same time, only a pair of magnets 110 is needed to drive the voice coil 140. One end of the voice coil 140 is connected to the diaphragm 130, and the other end of the voice coil 140 is placed in the voice coil space 123. In this way, please refer to Figure 8 As shown, a closed magnetic field is formed between a pair of magnets 110 to drive the voice coil 140 to vibrate up and down through the change of the magnetic field, thereby driving the diaphragm 130 to vibrate and produce high pitch.

[0046] In a preferred embodiment, the upper and lower sides of the pair of magnetic conductive plates 120 facing each other are thinned to form a concentrated magnetic conductive portion 121 in the middle, and the concentrated magnetic conductive portion 121 is arranged corresponding to the position of the voice coil 140. In a feasible implementation, the thinning thickness is 0.1-0.2mm, and the height of the concentrated magnetic conductive portion 121 is 0.5-1mm. Figure 8 As shown, a uniform and concentrated magnetic field is formed in the concentrated magnetic conductive portion 121 to act on the voice coil 140 in a concentrated manner, so that the voice coil 140 generates stable and efficient vibration when driven by a signal.

[0047] Please refer to Figure 1-Figure 4 As shown, the tweeter also includes a U-cup 150, which has a pair of mounting slots 151 running through it along its length direction. A clamping portion 124 is formed on both sides of the magnetic conductive plate 120. The pair of magnetic conductive plates 120 are clamped in the mounting slots 151 one by one through their respective clamping portions 124 and fixed by welding.

[0048] This structure not only simplifies the structure of the product and makes it easier to assemble, but also because there is no need to reserve space inside the U cup to install the magnetic plate 120, the inner cavity of the U cup 150 is longer, which is conducive to providing more winding space.

[0049] Please refer to Figure 4 and Figure 6 As shown, in a preferred embodiment, the height of the upper edge of the side wall of the U cup 150 is higher than the height of the magnetic circuit unit to form a diaphragm support 152 for supporting the diaphragm 130. In this way, no additional connection is required, and the heightened U cup 150 can be directly used to replace the basin frame as the diaphragm support 152. That is, the tweeter of the present application does not need to be provided with a basin frame, which further simplifies the product structure. In a feasible example, the height of the diaphragm support 152 is 0.3-0.5mm. Corresponding to the increase in the height of the U cup 150, the upper edge of the magnetic conductive plate 120 forms an increased portion 122 for filling the increased rear mounting slot 151.

[0050] At least one end of the bottom side of the U cup 150 is formed with a mounting notch 153 that is connected to the inner cavity of the U cup 150. The PCB board 160 is installed in the mounting notch 153. The lead of the voice coil 140 can be conveniently led from the inner cavity of the U cup 150 to the PCB board 160 and connected to the PCB board 160. At the same time, through this connection method, the suspension length of the lead of the voice coil 140 is increased, and it is not easy to break the wire during the vibration process. In addition, through this connection method between the mounting notch 153 and the PCB board 160, the pin end of the PCB board 160 is externally placed. When using the tweeter of the present application, more assembly contact methods such as spring foot contact, welding wire or FPC can be directly used, which provides convenience for subsequent operations such as frequency division.

[0051] In addition, the installation notch 153 is provided so that the tweeter speaker of the present application does not need magnetic fluid and can also dissipate heat well, thereby delaying the aging of the voice coil material and the adhesive.

[0052] Please refer to Figure 8 As shown, preferably, a reserved expansion space H is provided between the lower end of the magnetic conductive plate 120 and the bottom of the inner cavity of the U cup 150, and the height of the reserved expansion space H is 1-3 mm. By providing the reserved expansion space H, when it is needed to be combined with the mid-range to become a mid-high frequency speaker in the future, installation space is provided for the auxiliary vibration component.

[0053] Please refer to Fig.10 As shown, preferably, the voice coil 140 includes a voice coil frame 141 and an enameled wire 142 wound on the voice coil frame 141. The voice coil frame 141 is a solid light-weight hard tube, such as a carbon nanocomposite tube or an aluminum-magnesium alloy tube. The solid light-weight hard tube enables the voice coil 140 to have a certain rigidity and withstand the electromagnetic force of the magnetic field. The enameled wire 142 is wound on the voice coil frame 141 in a single layer or multiple layers.

[0054] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A tweeter loudspeaker installed in a flat device, characterized in that include: A magnetic circuit unit, the magnetic circuit unit comprising a pair of magnets and a pair of magnetic conductive plates, the pair of magnets being arranged in parallel and having the same magnetic pole direction, the pair of magnetic conductive plates being arranged on the inner sides of the pair of magnets, and a voice coil space being formed between the pair of magnetic conductive plates; A vibration unit, the vibration unit comprising a diaphragm and a voice coil, the diaphragm faces the sound outlet in the flat device, the diaphragm is horizontally arranged above the magnetic circuit unit, the voice coil is narrow and long, the axis of the voice coil is perpendicular to the diaphragm, one end of the voice coil is connected to the diaphragm, and the other end of the voice coil is placed in the voice coil space; The upper and lower sides of the pair of magnetic conductive plates facing each other are thinned to form a concentrated magnetic conductive portion in the middle. The concentrated magnetic conductive portion is arranged corresponding to the position of the voice coil, and the height of the concentrated magnetic conductive portion is adapted to the stroke of the voice coil.

2. The tweeter speaker according to claim 1, characterized in that: It also includes a U cup, which has a pair of installation slots running through it along its length direction. The two sides of the magnetic conductive plate form a clamping part, and the pair of magnetic conductive plates are clamped in the installation slots one by one through their respective clamping parts.

3. The tweeter speaker according to claim 2, characterized in that: The height of the upper edge of the side wall of the U cup is higher than the height of the magnetic circuit unit to form a diaphragm support for supporting the diaphragm, and the upper edge of the magnetic conductive plate forms a corresponding raised portion for filling the installation slot.

4. The tweeter speaker according to claim 3, characterized in that: The height of the diaphragm support is 0.3-0.5 mm.

5. The tweeter loudspeaker according to claim 2 or 3, characterized in that: The clamping portion and the mounting notch are fixed by welding.

6. The tweeter speaker according to claim 2, characterized in that: It also includes a PCB board connected to the lead of the voice coil, at least one end of the bottom side of the U cup forms a mounting notch that penetrates the inner cavity of the U cup, and the PCB board is installed on the mounting notch.

7. The tweeter speaker according to claim 6, characterized in that: The pin ends of the PCB board correspond to the external settings of the U cup.

8. The tweeter speaker according to claim 2, characterized in that: A reserved expansion space is provided between the lower end of the magnetic conductive plate and the bottom of the inner cavity of the U cup, and the height of the reserved expansion space is 1-3 mm.

9. The tweeter speaker according to claim 1, characterized in that: The voice coil comprises a voice coil frame and an enameled wire wound on the voice coil frame. The voice coil frame is a solid lightweight hard tube. The enameled wire is wound on the voice coil frame in a single layer or multiple layers.

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