Balanced armature drive unit

Abstract

The utility model discloses a balanced armature drive unit, including drive mechanism and maintenance mechanism, the drive mechanism includes a plurality of permanent magnet, the balanced armature that sets up between a plurality of permanent magnet, the coil that winds in the outside of balanced armature, maintenance mechanism, maintenance mechanism includes the magnetic separation pad that links to the adjacent two permanent magnet between, installs the magnetic separation board in the outside of magnetic separation pad. In the utility model, the coil is connected with outside power supply, then the magnetic field formed between a plurality of permanent magnet makes balanced armature steady suspension, then because permanent magnet distributes in the whole around of balanced armature, so balanced armature movement direction obtains the restriction, makes it only axial movement, improves the stability of balanced armature movement.

Description

Technical Field

[0001] This utility model relates to the field of balance armature technology, specifically a balance armature drive unit. Background Technology

[0002] A receiver, also called a handset, is an electroacoustic device that converts audio electrical signals into sound signals under conditions of no sound leakage (or according to the ITU standard type 3.2 high / low leakage ring). It is widely used in communication terminal equipment such as mobile phones, landline phones and hearing aids to realize audio (voice, music) playback.

[0003] Application number CN201921141268.1 discloses a moving-arm receiver for easy diaphragm positioning, including a housing, a balanced armature coil, and a diaphragm body. This moving-arm receiver features a fixed cover, a locking block, a spring, and a fixed base. The spring between the fixed cover and the fixed base allows for convenient positioning of the diaphragm body via the fixed cover. This application uses the magnetic fields of a first permanent magnet and a second permanent magnet to stably levitate the balanced armature, but this cannot prevent its reciprocating movement, resulting in instability during balanced armature movement. Utility Model Content

[0004] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the technical solution adopted by this utility model is as follows:

[0006] A balanced armature drive unit includes a drive mechanism and a maintenance mechanism. The drive mechanism includes a plurality of permanent magnets, a balanced armature disposed between the plurality of permanent magnets, and a coil wound around the outside of the balanced armature. The maintenance mechanism includes a magnetic shielding pad connected between two adjacent permanent magnets and a magnetic shielding plate installed on the outside of the magnetic shielding pad.

[0007] By adopting the above technical solution, the coil is connected to an external power source, and the magnetic field formed between multiple permanent magnets makes the balance armature float smoothly. Since the permanent magnets are distributed around the balance armature, the direction of movement of the balance armature is restricted, so that it can only move axially, thereby improving the stability of the balance armature's movement.

[0008] In a preferred embodiment, the present invention can be further configured such that the permanent magnet consists of two plastic shafts and a permanent magnet body, with both plastic shafts mounted on the outside of the permanent magnet body.

[0009] In a preferred embodiment, the present invention can be further configured such that: the outer side of the balance armature is provided with a housing, and the outer end of the plastic shaft is fixedly connected to the inner wall of the housing.

[0010] In a preferred embodiment, this invention can be further configured such that: multiple permanent magnets are arranged in a ring around the outside of the balance armature, and the vertical cross-section of the permanent magnets is set to be arc-shaped.

[0011] In a preferred embodiment, the present invention can be further configured such that: the two ends of the coil vertically penetrate the permanent magnet located at the top of the balance armature, and the two ends of the coil extend to the top of the outer casing.

[0012] In a preferred embodiment, the present invention can be further configured such that: two rods are installed on the outer side of the magnetic shielding plate, and the outer ends of the two rods are fixedly connected to the inner wall of the outer shell.

[0013] In a preferred embodiment, the present invention can be further configured such that: multiple bolts are connected between the magnetic shielding pad and the magnetic shielding plate, and the multiple bolts are equally spaced and arranged in two rows.

[0014] By adopting the above technical solution, the beneficial effects achieved by this utility model are as follows:

[0015] 1. In this utility model, the coil is connected to an external power source, and the magnetic field formed between multiple permanent magnets causes the balance armature to levitate smoothly. Since the permanent magnets are distributed around the balance armature, the direction of movement of the balance armature is restricted, so that it can only move axially, thereby improving the stability of the balance armature's movement.

[0016] 2. In this utility model, multiple magnetic shielding pads and magnetic shielding plates work together to reduce the influence of the external environment on the magnetic field and further stabilize and balance the movement of the armature. Attached Figure Description

[0017] Figure 1 This is a perspective view of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the drive mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the maintenance mechanism of this utility model.

[0020] Figure label:

[0021] 100. Drive mechanism; 110. Permanent magnet; 120. Balance armature; 130. Coil;

[0022] 200. Maintenance mechanism; 210. Magnetic shielding mat; 220. Magnetic shielding plate;

[0023] 300. Outer casing;

[0024] 400, rod;

[0025] 500, Bolt. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0027] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0028] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a balanced armature drive unit.

[0029] Example 1:

[0030] Combination Figure 1-3 As shown, the present invention provides a balance armature drive unit, including a drive mechanism 100 and a maintenance mechanism 200. The drive mechanism 100 includes a plurality of permanent magnets 110, a balance armature 120 disposed between the plurality of permanent magnets 110, and a coil 130 wound around the outside of the balance armature 120.

[0031] Maintenance mechanism 200 includes a magnetic shielding pad 210 connected between two adjacent permanent magnets 110 and a magnetic shielding plate 220 installed on the outside of the magnetic shielding pad 210.

[0032] Furthermore, the permanent magnet 110 is composed of two plastic shafts and a permanent magnet body. Both plastic shafts are installed on the outside of the permanent magnet body. The structural design of the permanent magnet 110 allows it to be stably installed inside the outer casing 300.

[0033] Furthermore, multiple permanent magnets 110 are arranged around the outside of the balance armature 120. The vertical cross-section of the permanent magnets 110 is set to be arc-shaped. The shape design of the permanent magnets 110 enables the multiple permanent magnets 110 to effectively construct a magnetic field, allowing the balance armature 120 to float stably.

[0034] Example 2:

[0035] Combination Figure 1 As shown, based on Embodiment 1, the outer side of the balance armature 120 is provided with a housing 300, and the outer end of the plastic shaft is fixedly connected to the inner wall of the housing 300. The housing 300 can protect the components involved in the drive mechanism 100 and the maintenance mechanism 200, and ensure the service life of each component.

[0036] Furthermore, the two ends of the coil 130 vertically penetrate the permanent magnet 110 located at the top of the balance armature 120, and the two ends of the coil 130 extend to the top of the outer shell 300. The connection method of the coil 130 can play the role of stabilizing the balance armature 120.

[0037] Furthermore, two rods 400 are installed on the outer side of the magnetic shielding plate 220. The outer ends of the two rods 400 are fixed to the inner wall of the outer shell 300. The rods 400 can reinforce the magnetic shielding plate 220 and enable the magnetic shielding plate 220 to stably maintain the magnetic field.

[0038] Example 3:

[0039] Combination Figure 1 and Figure 3 As shown, in the above embodiment, a plurality of bolts 500 are connected between the magnetic shielding pad 210 and the magnetic shielding plate 220. The plurality of bolts 500 are equally spaced and arranged in two rows. The bolts 500 can strengthen the connection between the magnetic shielding pad 210 and the magnetic shielding plate 220.

[0040] The working principle and usage process of this utility model are as follows: When this device is put into actual use, the coil 130 is connected to an external power source. Then, the magnetic field formed between the multiple permanent magnets 110 causes the balance armature 120 to float stably. Since the permanent magnets 110 are distributed around the balance armature 120, the direction of movement of the balance armature 120 is restricted, so that it can only move axially. During this period, the multiple magnetic isolation pads 210 and magnetic isolation plates 220 work together to reduce the influence of the external environment on the magnetic field and further stabilize the movement of the balance armature 120.

[0041] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A balanced armature drive unit, characterized in that, include: The drive mechanism (100) includes a plurality of permanent magnets (110), a balance armature (120) disposed between the plurality of permanent magnets (110), and a coil (130) wound around the outside of the balance armature (120). Maintenance mechanism (200) includes a magnetic shielding pad (210) connected between two adjacent permanent magnets (110) and a magnetic shielding plate (220) installed on the outside of the magnetic shielding pad (210).

2. The balanced armature drive unit according to claim 1, characterized in that, The permanent magnet (110) consists of two plastic shafts and a permanent magnet, with both plastic shafts mounted on the outside of the permanent magnet.

3. The balanced armature drive unit according to claim 2, characterized in that, The balance armature (120) is provided with a housing (300) on the outside, and the outer end of the plastic shaft is fixedly connected to the inner wall of the housing (300).

4. The balanced armature drive unit according to claim 1, characterized in that, Multiple permanent magnets (110) are arranged in a ring around the outside of the balance armature (120), and the vertical cross section of the permanent magnets (110) is set to be arc-shaped.

5. A balanced armature drive unit according to claim 3, characterized in that, The coil (130) is vertically inserted through the permanent magnet (110) located at the top of the balance armature (120) at both ends, and the coil (130) extends to the top of the outer shell (300).

6. A balanced armature drive unit according to claim 3, characterized in that, Two rods (400) are installed on the outside of the magnetic shielding plate (220), and the outer ends of the two rods (400) are fixed to the inner wall of the outer shell (300).

7. A balanced armature drive unit according to claim 1, characterized in that, The magnetic shielding pad (210) and the magnetic shielding plate (220) are connected by multiple bolts (500), which are equally spaced and arranged in two rows.

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