Full-frequency linear acoustic oscillator

Abstract

The utility model discloses a full-frequency linear acoustic oscillator, and the structure of the oscillator comprises a housing which is internally provided with a cavity; the rotor assembly comprises a mass block, an upper elastic assembly and a lower elastic assembly are arranged on the upper surface and the lower surface of the mass block respectively, a through hole groove is formed in the mass block, a magnetic block is arranged in the hole groove, outer magnetic conductive pieces are arranged at the bottom and the top of the magnetic block, the stator assembly comprises a cover plate, and an iron core protruding upwards is arranged on the surface of the cover plate; a cavity is formed in the magnetic block, a coil is wound on the iron core, an inner magnetic conductive sheet covers the surface of the coil, the coil is sleeved in the magnetic block to form a magnetic circuit system, and the cover plate is sealed at the bottom of the cavity. The inner magnetic conductive sheet and the outer magnetic conductive sheet play a magnetic gathering role on a magnetic field near the iron core, and the magnetic gathering role can improve the magnetic field intensity of the oscillator; therefore, the broadband effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic conversion, and more specifically, to a full-frequency linear acoustic oscillator. Background Art

[0002] As a product that replaces traditional speakers, the oscillator is currently being used in the preliminary research of complete products such as mobile phones, cars and subways. The structure of the oscillator generally includes a stator component and a vibrator component. The stator component includes an elastic component and a shell. The vibrator component includes a magnetic circuit system and a mass block. The magnetic circuit system connects the circuit and provides power to the oscillator through the magnets in the magnetic circuit system to drive the mass block to move, and reciprocates in combination with the restoring force of the elastic component. One end of the elastic component is connected to the shell to transmit vibration to the outside world. This vibration acts on the carrier, and by pushing the carrier, the carrier and the air resonate to produce sound. In actual experience, it is found that the oscillator often performs poorly in wide frequency. In view of this, the utility model has improved the structure of the oscillator to achieve the broadband effect of changing the oscillator. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a full-frequency linear acoustic oscillator.

[0004] To achieve the above purpose, the innovative features of the utility model are as follows: its structure includes:

[0005] A shell body, wherein a cavity is provided inside the shell body;

[0006] The mover assembly includes a mass block, the upper and lower surfaces of the mass block are respectively provided with an upper elastic component and a lower elastic component, the mass block is provided with a through hole, a magnetic block is provided inside the hole, and an outer magnetic conductive sheet is provided at the bottom and top of the magnetic block, and the two outer magnetic conductive sheets are respectively flush with the top and bottom of the hole;

[0007] The stator assembly includes a cover plate, the surface of the cover plate is provided with an iron core protruding upward, a coil is surrounded by the iron core, the surface of the coil is covered with an inner magnetic conductive sheet, and the coil is sleeved inside the magnetic block to form a magnetic circuit system;

[0008] The cover plate is closed at the bottom of the cavity, one end of the upper elastic component is fixed to the left end of the mass block, the other end of the upper elastic component is fixed to the top inside the cavity, one end of the lower elastic component is fixed to the right end of the mass block, and the other end of the lower elastic component is fixed to the cover plate, and the mass block is suspended inside the cavity through the upper elastic component and the lower elastic component and vibrates up and down along the connecting line between the upper elastic component and the lower elastic component.

[0009] Furthermore, the magnetic circuit system is a single magnetic circuit system or a double magnetic circuit system.

[0010] Furthermore, the upper elastic component and the lower elastic component are both spring sheets, and the spring sheets are both provided with avoidance grooves, which are larger than the hole grooves.

[0011] Furthermore, the spring piece is in any one of a Z-shape, a U-shape, and a straight-line shape.

[0012] Furthermore, the cover plate and the top of the cavity are both provided with bosses, and one end of the lower elastic component and the upper elastic component are both fixed on the bosses.

[0013] Furthermore, positioning protrusions are provided on both sides of the other end of the lower elastic component, and symmetrical positioning grooves are provided on the inner wall of the bottom of the cavity, and the positioning protrusions are correspondingly fixed inside the positioning grooves.

[0014] Furthermore, symmetrical notches are provided at both ends of the mass block, and the two notches are respectively located below the other end of the lower elastic component and the upper elastic component.

[0015] Technical effects and advantages of the utility model: The utility model uses the inner magnetic conductive sheet and the outer magnetic conductive sheet to concentrate the magnetic field near the iron core. Preferably, the inner magnetic conductive sheet and the outer magnetic conductive sheet are made of pure iron or soft magnetic material. This magnetic concentration effect can increase the magnetic field strength of the oscillator, thereby improving the broadband effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the internal lateral side of the utility model.

[0017] Figure 2 It is an isometric drawing of the mass block of the utility model. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1 to Figure 2 A specific implementation of the utility model includes:

[0020] A housing 1, wherein a cavity 11 is provided inside the housing 1;

[0021] The movable subassembly includes a mass block 2, an upper elastic assembly 21 and a lower elastic assembly 22 are respectively provided on the upper and lower surfaces of the mass block 2, a through hole 23 is provided on the mass block 2, a magnetic block 24 is provided inside the hole 23, and an outer magnetic conductive sheet 25 is provided at the bottom and top of the magnetic block 24, and the two outer magnetic conductive sheets 25 are respectively flush with the top and bottom of the hole 23;

[0022] The stator assembly includes a cover plate 3, the surface of the cover plate 3 is provided with an iron core 31 protruding upward, a coil 32 surrounds the iron core 31, the surface of the coil 32 is covered with an inner magnetic conductive sheet 33, and the coil 32 is sleeved inside the magnetic block 24 to form a magnetic circuit system;

[0023] The cover plate 3 is enclosed at the bottom of the cavity 11, one end of the upper elastic component 21 is fixed to the left end of the mass block 2, the other end of the upper elastic component 21 is fixed to the top inside the cavity 11, one end of the lower elastic component 22 is fixed to the right end of the mass block 2, the other end of the lower elastic component 22 is fixed to the cover plate 3, and the mass block 2 is suspended inside the cavity 11 by the upper elastic component 21 and the lower elastic component 22 and vibrates up and down along the connecting line between the upper elastic component 21 and the lower elastic component 22.

[0024] In the utility model, the working principle of the oscillator is as follows: the coil 32 provides alternating current, and through alternating current commutation and control of the current size, the iron core 31 generates a changing magnetic field inside the magnetic block 24, thereby driving the mass block 2 to vibrate up and down along the connecting line between the upper elastic component 21 and the lower elastic component 22 inside the cavity 11. This oscillator is attached to other audio carriers such as glass, plates, etc., to drive the carrier to vibrate together, and then the carrier pushes the air to generate sound.

[0025] In the utility model, the inner magnetic conductive sheet 33 and the outer magnetic conductive sheet 25 play a role in focusing the magnetic field near the iron core 31. Preferably, the inner magnetic conductive sheet 33 and the outer magnetic conductive sheet 25 are made of pure iron or soft magnetic material. This magnetic focusing effect can increase the magnetic field strength of the oscillator, thereby improving the broadband effect.

[0026] In the present utility model, as a preferred solution, the magnetic circuit system is a single magnetic circuit system or a double magnetic circuit system.

[0027] In the present invention, regardless of whether it is a single magnetic circuit system or a dual magnetic circuit system, the working principles of the two are similar and both can be applied to the oscillator.

[0028] In the present invention, as a preferred solution, the upper elastic component 21 and the lower elastic component 22 are both spring sheets, and the spring sheets are both provided with an avoidance groove 4 , which is larger than the hole groove 23 .

[0029] In the present invention, the setting of the avoidance groove 4 can prevent the mass block 2 from colliding with the upper elastic component 21 or the lower elastic component 22 during the up and down vibration process, thereby ensuring the effect of the up and down vibration of the mass block 2.

[0030] In the present invention, as a preferred solution, the spring piece is in any one of a Z-shape, a U-shape, and a straight-line shape.

[0031] In the present invention, as a preferred solution, the cover plate 3 and the top of the cavity 11 are both provided with a boss 41 , and one end of the lower elastic component 22 and the upper elastic component 21 are both fixed on the boss 41 .

[0032] In the utility model, the setting of the boss 41 allows a certain distance between the upper elastic component 21 and the top of the cavity 11, and a certain distance between the lower elastic component 22 and the cover plate 3, thereby preventing the upper elastic component 21 from colliding with the top of the cavity 11 and the lower elastic component 22 from colliding with the cover plate 3 during the vibration of the oscillator.

[0033] In the present invention, as a preferred solution, positioning protrusions 5 are provided on both sides of the other end of the lower elastic component 22 , and symmetrical positioning grooves 51 are provided on the inner wall of the bottom of the cavity 11 , and the positioning protrusions 5 are correspondingly fixed inside the positioning grooves 51 .

[0034] In the present invention, the positioning protrusion 5 and the positioning groove 51 are fixed to fix and position the lower elastic component 22, thereby preventing the lower elastic component 22 from being offset during assembly and movement, thereby affecting the performance of the oscillator.

[0035] In the present invention, as a preferred solution, symmetrical notches 6 are provided at both ends of the mass block 2 , and the two notches 6 are respectively located below the other end of the lower elastic component 22 and the upper elastic component 21 .

[0036] In the present invention, the notch 6 can provide appropriate air damping, and provide appropriate damping for the up and down vibration of the upper elastic component 21 or the lower elastic component 22, thereby improving the broadband oscillation effect.

[0037] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0038] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0039] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A full-frequency linear acoustic oscillator, characterized in that: Its structure includes: A housing (1), wherein a cavity (11) is provided inside the housing (1); A mover assembly, the mover assembly comprising a mass block (2), the upper and lower surfaces of the mass block (2) being respectively provided with an upper elastic assembly (21) and a lower elastic assembly (22), the mass block (2) being provided with a through hole (23), a magnetic block (24) being provided inside the hole (23), the bottom and top of the magnetic block (24) being provided with external magnetic conductive sheets (25), the two external magnetic conductive sheets (25) being respectively flush with the top and bottom of the hole (23); A stator assembly, the stator assembly comprising a cover plate (3), the surface of the cover plate (3) being provided with an iron core (31) protruding upward, a coil (32) surrounding the iron core (31), the surface of the coil (32) being covered with an inner magnetic conductive sheet (33), the coil (32) being sleeved inside the magnetic block (24) to form a magnetic circuit system; The cover plate (3) is sealed at the bottom of the cavity (11); one end of the upper elastic component (21) is fixed to the left end of the mass block (2); the other end of the upper elastic component (21) is fixed to the top of the cavity (11); one end of the lower elastic component (22) is fixed to the right end of the mass block (2); the other end of the lower elastic component (22) is fixed to the cover plate (3); the mass block (2) is suspended inside the cavity (11) through the upper elastic component (21) and the lower elastic component (22) and vibrates up and down along the connecting line between the upper elastic component (21) and the lower elastic component (22).

2. A full-frequency linear acoustic oscillator according to claim 1, characterized in that: The magnetic circuit system is a single magnetic circuit system or a double magnetic circuit system.

3. A full-frequency linear acoustic oscillator according to claim 1, characterized in that: The upper elastic component (21) and the lower elastic component (22) are both spring sheets, and both spring sheets are provided with avoidance grooves (4), wherein the avoidance grooves (4) are larger than the hole grooves (23).

4. A full-frequency linear acoustic oscillator according to claim 3, characterized in that: The spring piece is in any one of a Z-shape, a U-shape and a straight line shape.

5. A full-frequency linear acoustic oscillator according to claim 3, characterized in that: The cover plate (3) and the top of the cavity (11) are both provided with a boss (41), and one end of the lower elastic component (22) and the upper elastic component (21) are both fixed on the boss (41).

6. A full-frequency linear acoustic oscillator according to claim 5, characterized in that: Positioning protrusions (5) are provided on both sides of the other end of the lower elastic component (22), and symmetrical positioning grooves (51) are provided on the inner wall of the bottom of the cavity (11), and the positioning protrusions (5) are correspondingly fixed inside the positioning grooves (51).

7. A full-frequency linear acoustic oscillator according to claim 5, characterized in that: Symmetrical notches (6) are provided at both ends of the mass block (2), and the two notches (6) are respectively and correspondingly located below the other end of the lower elastic component (22) and the upper elastic component (21).

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