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KR-102964201-B1 - Slim Speaker

KR102964201B1KR 102964201 B1KR102964201 B1KR 102964201B1KR-102964201-B1

Abstract

The present invention relates to a slim speaker comprising: a magnetic circuit portion for forming a magnetic circuit; and a sound generating portion disposed on the magnetic circuit, wherein the magnetic circuit portion comprises a magnet for generating a magnetic field, an inner plate for providing a path for the movement of the magnetic field, and an outer plate disposed spaced apart from the inner plate, wherein the inner plate, the magnet, and the outer plate are disposed in the width direction.

Inventors

  • 박근도
  • 송봉주
  • 성지원

Assignees

  • 에스텍 주식회사

Dates

Publication Date
20260513
Application Date
20231025

Claims (10)

  1. A magnetic circuit part for forming a magnetic circuit; and It includes a sound generating unit disposed on the above magnetic circuit, and The above magnetic circuit section is, Magnet that generates a magnetic field, An inner plate providing a path for the movement of the magnetic field; and It includes an outer plate positioned to be spaced apart from the inner plate, and The inner plate, the magnet, and the outer plate are arranged in the width direction, and It includes a magnetic gap formed between the inner plate and the outer plate, The inner plate includes an inner induction member protruding toward the magnetic gap so that magnetic flux is concentrated in the magnetic gap, and The thickness of the inner plate is reduced based on the width direction by the amount to which the inner guiding member protrudes toward the magnetic gap, and The shortest first distance between the inner guide member and the outer plate is constant, and the shortest second distance between the inner plate and the outer plate is constant, and A slim speaker characterized by the first distance being smaller than the second distance.
  2. In paragraph 1, A slim speaker characterized by the magnet being positioned between the inner plate and the outer plate based on the width direction.
  3. In paragraph 1, It includes a plurality of the above magnets, A slim speaker characterized by the above magnets being arranged on both sides of the inner plate based on the width direction.
  4. In paragraph 3, A slim speaker characterized by the above magnets being arranged in axial symmetry with respect to a virtual centerline positioned with respect to the height direction perpendicular to the width direction.
  5. In paragraph 1, It includes a magnetic gap formed between the inner plate and the outer plate, and A slim speaker characterized in that at least a portion of the sound generating part is disposed in the magnetic gap.
  6. In paragraph 1, The above magnet and the above outer plate comprise a plurality of The magnets are arranged on both sides of the inner plate based on the width direction, and A slim speaker characterized by the above outer plates being positioned on both sides of the magnets based on the width direction.
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Description

Slim Speaker The present invention relates to a speaker, and more specifically, to a slim speaker having a thin structure. A speaker is an acoustic device that converts electrical signals into vibrations of a diaphragm to generate compressional waves in the air and radiate sound. Such speakers are also referred to as loudspeakers. Speakers in which the diaphragm is placed directly in the air are called radiating speakers, while those in which the diaphragm is placed inside a horn are called horn speakers. Direct radiating speakers are mostly cone speakers, which are commonly used in stereo radios, although some utilize metal diaphragms. These speakers are embedded in electronic devices such as TVs and audio equipment to serve as sound devices. Recently, as electronic devices containing speakers have become smaller, there is a growing demand for the miniaturization of speakers as well. FIG. 1 is a schematic cross-sectional view of a speaker (100) according to the prior art. Referring to FIG. 1, a speaker (100) according to the prior art may include a magnet (110) that generates a magnetic field, a plate (120) and a yoke (130) that provide a path for the movement of the magnetic field. In the speaker (100) according to the prior art, the magnet (110), the plate (120), and the yoke (130) may be arranged in a stacked manner based on the height direction (HD arrow direction). In this case, the magnet (110) and the plate (120) may be formed in a ring shape so as to be formed in a structure into which the pole (131) portion of the yoke (130) is inserted. Additionally, in the speaker (100) according to the prior art, a magnetic gap (G') may be formed between the yoke (130) and the plate (120) for inserting a voice coil (140). In order to miniaturize the structure of the speaker (100) according to the prior art based on the width direction perpendicular to the height direction (HD arrow direction) while maintaining the same volume, if the width of the magnet (110) is reduced and the thickness is increased in the height direction (HD arrow direction), there is a problem in that the magnetic flux density in the magnetic gap (G') decreases. FIG. 1 is a schematic cross-sectional view of a speaker according to the prior art. FIG. 2 is a schematic perspective view of a slim speaker according to the present invention. FIG. 3 is a schematic cross-sectional view illustrating a magnetic gap in a slim speaker according to the present invention. FIG. 4 is a schematic cross-sectional view of a slim speaker according to the present invention. FIG. 5 is a magnetic flux flow diagram in a slim speaker according to the present invention. FIG. 6 is a schematic cross-sectional view according to another embodiment of a slim speaker according to the present invention. Hereinafter, an embodiment of a slim speaker according to the present invention will be described in detail with reference to the attached drawings. Referring to FIG. 2, the slim speaker (1) according to the present invention is intended to generate sound. When current is applied to a voice coil (31) disposed on a magnetic circuit formed by a magnetic circuit part (2) of the slim speaker (1) according to the present invention, the voice coil (31) vibrates in the height direction (in the direction of the HD arrow). In this case, the slim speaker (1) according to the present invention generates sound as the diaphragm (32) coupled to the voice coil (31) vibrates. Referring to FIGS. 2 and FIGS. 3, the slim speaker (1) according to the present invention may include a magnetic circuit part (2). The above magnetic circuit section (2) is intended to form a magnetic circuit. The above magnetic circuit section (2) can form a path for the movement of a magnetic field. The above magnetic circuit section (2) may include a magnet (21), an inner plate (22), and an outer plate (23) to form a magnetic circuit. The magnet (21) generates a magnetic field. The magnet (21) can generate a magnetic field to form a magnetic circuit. The magnet (21) can be positioned between the inner plate (22) and the outer plate (23) with respect to the width direction (WD arrow direction). The magnetic field generated from the magnet (21) can travel along the inner plate (22) and the outer plate (23). Accordingly, the magnet (21), the inner plate (22), and the outer plate (23) can form a magnetic circuit. The strength of the magnetic field in the slim speaker (1) according to the present invention may vary depending on the size of the magnet (21). The magnet (21) may be a permanent magnet. The inner plate (22) provides a path for the movement of the magnetic field. The inner plate (22) may be placed inside the magnet (21). The inner plate (22) may be placed adjacent to the magnet (21) with respect to the width direction (WD arrow direction). Accordingly, the inner plate (22) may be magnetized by the magnet (21). The outer plate (23) is positioned so as to be spaced apart from the inner plate (22). The outer pla