KR102260759B1 - Water drainage structure for microspeaker - Google Patents

Abstract

Provided, in the present invention, is a microspeaker having a water draining structure capable of quickly discharging, to the outside, water that has entered the microspeaker. Water is discharged through a side surface and a bottom of a housing in a case of a woofer-twitter speaker and through the side surface of the housing in a case of a 1-way speaker.

Description

Water drainage structure for microspeaker

The present invention relates to a microspeaker drainage, that is, water draining or draining structure.

A speaker uses a principle opposite to that of a microphone that converts electrical signals into the form of sound waves. When current enters the coil, the magnet turns into an electromagnet with its own magnetic field, and it alternately produces sound waves by contacting the surrounding continuous magnetic field. It is an electronic product that generates sound waves and outputs sound by vibrating the coil by the force of attraction or repulsion that pulls or pushes, and vibrates the diaphragm.

Moisture or water degrades the performance of electronic components such as speakers, and many water-repellent or water-blocking structures have been proposed.

Korean Patent No. 10-2019-019267 discloses a structure that blocks the inflow of water by placing a partition wall inside the speaker. Korean Utility Model Registration No. 20-0412710 proposes a structure in which water is discharged to the side in the opposite direction by placing a multi-level step structure. Korean Publication No. 10-2019-0084403 discloses a process for forming a water repellent layer on a microspeaker component. From a different point of view, Korean Publication No. 10-2019-019267 discloses a technology that emits a specific frequency when there is moisture or foreign material in a part and moves the foreign material to the discharge pipe by vibration force.

However, as the speaker becomes a necessity, a microspeaker having a structure for draining the water entering the speaker in an environment where water ingress is unavoidable, such as raining weather, underwater, or hot regions, has not yet been proposed. The presence of water inside microscopic electronic components such as microspeakers adversely affects the overall performance of the device, so it is necessary to introduce a structure that discharges water quickly and efficiently.

The inventors have developed a microspeaker having a structure capable of efficiently discharging water that has entered the speaker in consideration of such circumstances.

Therefore, an object of the present invention is to provide a microspeaker capable of discharging the introduced water quickly and efficiently and protecting minute parts from the residual and permeation of water.

In order to achieve the above object, the present invention provides a woofer diaphragm, a first coil positioned between a center portion and a boundary portion of the woofer diaphragm, a main magnet disposed inside the first coil, and covering the upper portion of the main magnet. A first support including a column extending through the center of the space formed by the magnet, a sub-magnet installed outside the first coil, and a second support surrounding the sub-magnet from the outside, There is provided a micro-speaker provided with a first screen that extends to a height that covers the space between the upper surface of the second support and the lower part of the woofer diaphragm while covering and has an open window formed on the side surface for discharging water.

A woofer grill may be installed on the woofer diaphragm, and a second screen extending from the woofer grill to a height covering the space between the upper portions of the woofer diaphragm and having an open window for discharging water on the side thereof may be further installed.

A waterproof mesh may be installed on the upper portion of the column of the first support to prevent water from entering the inside of the driver.

The open windows of the first screen and the second screen may be formed to be spaced apart from each other by a predetermined distance based on a cut line in the center direction of the speaker.

In addition, the present invention is a tweeter diaphragm, a second coil disposed to surround the lower part of the column of the first support between the central portion and the boundary of the tweeter diaphragm, while supporting the lower surface of the main magnet and extending while being spaced apart from the lower surface of the sub-magnet, A micro speaker whose rim includes a lower plate bent so as to be compressed around the outer periphery of the tweeter diaphragm, and the outer surface of the lower plate is installed to face the inner surface of the second support at a predetermined distance to provide a water discharge path. to provide.

It may further include a ring structure having a flow path communicating the space (A) in which water discharged through the first and second screens is collected and the space (B) in which water is discharged through the outer surface of the lower plate. can

The second support may include a passage communicating a space (A) in which water discharged through the first and second screens is collected and a space (B) in which water is discharged through the outer surface of the lower plate. have.

In addition, the present invention includes a diaphragm, a first coil, a support ring for supporting the periphery of the diaphragm, a main magnet, and an upper plate, and a ring-shaped support plate with a lower surface extending in contact with the upper surface of the support ring is located on the outside. , A cap-shaped drain housing is located on the inner surface of the support plate, the upper surface of the drain housing covers the main magnet, drain holes are formed on both sides for draining, and the side surface under the drain hole is the inner surface of the support plate. We provide a micro speaker that is in close contact with the side.

The present invention is characterized in that each part of the micro speaker is subjected to a water-repellent coating treatment.

In addition, the present invention provides a woofer diaphragm, an upper coil positioned between the center portion and the boundary of the woofer diaphragm, a main magnet disposed inside the upper coil, a sub-magnet installed outside the upper coil, and a tweeter facing the woofer diaphragm. A micro speaker including a diaphragm, wherein the micro speaker has an upper casing that covers the top of the driver and a lower casing that covers the rest of the structure, and the woofer diaphragm is pressed between the side edge of the upper casing and the auxiliary ring. installed, a cylindrical lower coil is disposed upward between the central part and the boundary part of the tweeter diaphragm, and the upper surface is in contact with the upper part of the main magnet and extends downward in an empty cylindrical shape to be accommodated in the lower coil, and a mesh is provided on the upper surface of the cylinder It provides a micro speaker comprising a central support covered with, and a lower support for supporting the lower surface of the main magnet and closing the outer surface in contact with the tweeter diaphragm.

According to the present invention, water-repellent coating is applied to the internal parts of the micro speaker and the water inside the speaker housing, especially around the driver, is discharged quickly and efficiently, thereby exhibiting the effect of protecting the speaker from water.

It will be understood that the effect of the present invention is clearly an improvement over the existing technology, which does not have a water discharging structure so that water remains and has to wait for evaporation.

The water discharge structure of the present invention has versatility that can be applied to not only a 1-way structure but also a 2-way speaker.

1 is an external perspective view of a microspeaker according to a first embodiment of the present invention;
FIG. 2 is a front view of the speaker of FIG. 1 as viewed from the center;
3 is a perspective view for explaining the water discharge structure of the speaker in FIG. 2 in more detail;
4 is a front view of a speaker according to a second embodiment of the present invention, cut from the center;
5 is a perspective view for explaining the water discharge structure of the speaker in FIG. 4 in more detail;
6 is a front view of a speaker according to a third embodiment of the present invention, cut from the center;
7 is a front view of a speaker according to a fourth embodiment of the present invention, cut from the center; And
8 is a front view of a speaker according to a fifth embodiment of the present invention, viewed from the center cut.

Objects and effects of the present invention, and technical configurations for achieving them will become apparent with reference to the embodiments described in detail later in conjunction with the accompanying drawings. In the description of the present invention, if it is determined that a detailed description of a well-known function or configuration may unnecessarily flow the gist of the present invention, the detailed description thereof will be omitted.

Throughout the specification, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated. Meanwhile, in an embodiment of the present invention, each of the components, functional blocks or means may be composed of one or more sub-components.

Each embodiment of the water discharge structure of the micro speaker of the present invention will be described.

first embodiment

1 is an external perspective view of a microspeaker 1 of the present invention. The micro-speaker 1 is a 2-way speaker mainly composed of a dome-shaped upper case 2 covering a woofer and a lower case 4 which is an ear cap covering a tweeter. A drain hole 70 is formed in the lower side of the upper case 2 . At the center of the lower surface of the lower case 4, the sound outlet 6 is formed to be inserted into the user's ear.

FIG. 2 is a front view of the speaker of FIG. 1 viewed from the center; FIG. FIG. 3 is a perspective view for explaining the water discharge structure of the speaker in FIG. 2 in more detail. Since the woofer-tweeter structure constituting the 2-way speaker is known to those skilled in the art, it will be described within the necessary limits.

A disk-shaped woofer grill 8 is installed under the upper case 2 . A space for mounting hardware is provided above the woofer grill 8 . The first coil 12 is disposed between the central portion and the boundary portion of the woofer diaphragm 10 , and a ring-shaped main magnet 50 is disposed inside the first coil 12 . The first support 14a is installed to pass through the center of the space formed by the magnet ring while covering the upper portion of the main magnet 50 . The central column of the first support 14a is hollow, but a waterproof mesh 14c is installed on the upper part to prevent water from entering the inside of the driver.

A ring-shaped sub-magnet 52 is also installed outside the first coil 12 , and an upper plate 14b is disposed on the first coil 12 . A thick ring-shaped second support 30 is fixed to the step of the lower case 4 so as to surround the sub-magnet 52 and the upper plate 14b from the outside. The first and second supports 14a and 30 may form a yoke portion.

3, the upper support ring 40a at the upper part and the lower support ring 40b at the lower part press the border to support the edge of the woofer diaphragm 10, and the two support rings 40a , 40b) is supported by the side support ring (40c). The lower surface of the lower support ring 40b is installed to be spaced apart from the upper surface of the second supporter 30, which provides a water draining path.

According to the present invention, the height of the first screen 32 for providing a water draining path to at least cover the space between the second supporter 30 and the lower support ring 40b while covering the outer periphery of the second supporter 30 . installed to extend to As shown in FIG. 3 , the first screen 32 is installed to be spaced apart from each other with an interval d based on the cut line in the center direction of the speaker. An open space or window through which water is drained is provided by the gap d, and a water discharge path is formed through this space as shown in FIG. 2 .

According to the present invention, the second screen 34 for providing a water draining path extends to contact the woofer grill 8 in the vicinity of the boundary between the side support ring 40c and the upper and lower support rings 40a and 40b. has been As shown in FIG. 3 , the second screen 34 is installed to be spaced apart from each other by at least a distance d with respect to the central direction cut line of the speaker, like the first screen 32 . An open space or window through which water is drained is provided by the gap, and a discharge path of water is formed through this space as shown in FIG. 2 .

The upper, lower and side support rings 40a, 40b, 40c, and the second supporter 30 are all continuous ring-shaped, the center is not cut and the diaphragm is hermetically compressed, but the first and second screens 32 and 34 ) are installed split to provide spacing. The first and second screens 32 and 34 do not have to be half annular like a half ring, but may be a rectangular plate as shown.

Next, a tweeter diaphragm 16 is installed inside the lower case 4, and a second coil 18 is disposed between the central portion and the boundary portion thereof so as to surround the column-shaped lower portion of the first support member 14a. The lower plate 20 supporting the lower surface of the main magnet 50 extends while being spaced apart from the lower surface of the sub magnet 52 , and its rim is bent so as to be compressed around the outer periphery of the tweeter diaphragm 16 .

3 , the outer surface 20a of the lower plate 20 is installed to face the inner surface 30a of the second support 30 at a predetermined interval. This gap provides a path for the water to drain out through the sound outlet (6).

Above, when the water draining structure of the present invention is comprehensively described with reference to FIG. 2, first, due to the waterproof mesh 14c covering the upper part of the central column of the first support 14a, at least the main magnet 50 of the driver formed by Water cannot enter the space. Water existing on the outside of the driver flows sideways through the second screen 34 on the upper side and the first screen 32 on the lower side with respect to the woofer diaphragm 10, and flows into the space (A). Collected and discharged to the outside through the drain hole (70). In addition, water existing on the outside of the driver flows downward along the interval of the outer diaphragm with respect to the tweeter diaphragm 16, gathers in the space B, and is discharged to the outside through the sound outlet 6

Since the woofer diaphragm 10 is naturally wider than the tweeter diaphragm 16, and the tweeter diaphragm 16 is adjacent to the sound outlet 6, from the perspective of the woofer diaphragm 10, water is discharged through the side and the tweeter From the viewpoint of the diaphragm 16, it will be appreciated that it is expedient to discharge the water through the lower portion, that is, the sound outlet 6 as much as possible. This aspect forms the core of the first embodiment of the present invention, and the shape, size and arrangement of each part can be appropriately changed or deleted.

In the present invention as described above, a water-repellent coating may be applied to the parts to protect the parts.

Meanwhile, FIG. 3 shows an additional water draining path not shown in FIG. 2 . That is, a flow path 30b is formed through the inside of the second support 30, and a semicircular blocking deck 30c is formed on the inner upper surface of the lower case 4 to form a narrow channel communicating with the flow path 30b. are installing In particular, since this structure communicates the space (A) and the space (B), the water draining effect can be further improved.

second embodiment

4 is a front view of the speaker according to the second embodiment cut from the center, and FIG. 5 is a perspective view for explaining the water discharge structure of the speaker in FIG. 4 in more detail. The microspeaker 1 according to the second embodiment of the present invention will be mainly described with respect to the differences from the first embodiment.

The difference from the first embodiment is that the inner surface 4a of the lower case 4 is newly exposed by deleting the thick portion of the lower case 4 in which the second support 30 is fixed to the step of the lower case 4 . ) and the second support 30, the ring structure 80 for drainage is installed separately. The ring structure 80 includes a first portion 84 supporting the second support, and a second portion 86 in contact with the side surface 4a and providing a circular flow path 82 .

Since the space (A) and the space (B) are communicated through the flow path (82), the water draining effect can be further improved.

third embodiment

6 is a front view of the speaker according to the third embodiment as viewed from the center, and the illustration of the upper and lower cases 2 and 4 is omitted. The microspeaker 1 according to the third embodiment of the present invention will be mainly described with respect to the differences from the first embodiment.

The difference from the first embodiment is that the second support 30 is extended to the newly exposed space by deleting the thick portion of the lower case 4 that is fixed to the step of the lower case 4 . that has been installed. A vertical flow path 30c is formed in the expanded portion.

Since the space (A) and the space (B) are communicated through the flow path (30c), the water draining effect can be further improved.

4th embodiment

7 is a front view of the speaker according to the fourth embodiment, cut from the center; The fourth embodiment is a 1-way speaker, unlike the above-described embodiment, and the detailed structure of the 1-way speaker is known to those skilled in the art, so it will be described to the extent necessary.

The speaker 1 of the present invention according to the fourth embodiment includes a diaphragm 300, a first coil 12, a support ring 202 for supporting the outer 302 of the diaphragm 300, a main magnet 50 and and an upper plate 50a.

A ring-shaped support plate 200 with a lower surface extended so as to be in contact with the upper surface of the support ring 202 is located on the outside, and a cap-shaped drain housing 100 is located on the inner surface of the support plate 200 . The upper surface of the drainage housing 100 covers the main magnet 50 , and drainage holes 106 for drainage are formed on both sides thereof, and the side surface under the drainage hole 106 is the inner surface of the support plate 200 and the inner surface of the support plate 200 . are in close contact.

Therefore, as shown, the water entering the inside of the first coil 12 is blocked by the diaphragm 300 and is quickly discharged to the outside through the drain hole 106 of the drain housing 100 .

In the above embodiment of the present invention, a water-repellent coating may be applied to the parts to protect the parts. This will ensure the performance of the part until the water inside is completely drained.

5th embodiment

Next, FIG. 8 is a cross-sectional view of the microspeaker 1 according to another embodiment of the present invention.

The microspeaker 1 has an external appearance of an upper casing 2-1 covering the upper portion of the driver and a lower casing 2-2 covering most of the remaining structures. A woofer diaphragm 3-1 with a pressed edge is installed between the side edge of the upper casing 2-1 and the auxiliary ring 24-1.

A cylindrical upper coil 5-1 is disposed downward between the central part and the side part of the woofer diaphragm 3-1. A tweeter diaphragm 4-1 is installed opposite the woofer diaphragm 3-1 and adjacent to the sound outlet, and a cylindrical lower coil 30-1 is positioned between the central and side portions of the tweeter diaphragm 4-1. are placed The main magnet 7-1 is mounted inside the space formed by the upper and lower coils 5-1 and 30-1, and the sub magnet 8-1 is disposed outside the upper coil 5-1.

In the present invention, the central support 6-1 has an upper surface in contact with the upper portion of the main magnet 7-1 and extends downward in a cylindrical shape with an empty center and is accommodated in the lower coil 30-1. A mesh 10-1 is covered on the upper surface of the cylinder.

In the present invention, the lower support 9-1 supports the lower surface of the main magnet 7-1 and the outer surface contacts the tweeter diaphragm 4-1 and closes it.

In the present invention, the side supports are the first and second side supports 20-1 and 22-1, the third and fourth side supports 12-1 and 13-1, and the fifth side support 10-1 from the top. ) is made of The first and second side supports 20 - 1 and 22-1 are continuously installed so as to be in contact with the lower surface of the lower support plate 25 - 1 installed under the woofer diaphragm 301 . The third side support 12-1 is in contact with the inner side of the upper surface of the sub-magnet 8-1, the fourth side support 13-1 is adjacent to the third side support 12-1, and the sub-magnet 8 -1) extends downward to cover the entire outside and side surfaces of the remaining upper surface. The fifth side support 10-1 surrounds the outer surface of the lower support 9-1, while the upper surface is in contact with the lower surface of the sub-magnet 8-1, and the lower surface is in contact with the bent lower surface of the lower casing 2-2. .

Looking at the structure of the side support and the lower casing (2-2), the second side support (22-1), the fourth side support (13-1), and the fifth side support (10-1) are the lower casing ( 2-2) and installed to be separated from Accordingly, as shown by the arrow, a passage is formed through which the woofer jindeungohm is transferred to the lower part or the high-pressure air formed in the external auditory meatus flows upward.

In addition, at least the fifth side support 10-1 is installed to be spaced apart from the longitudinal center line of the cross-section at a fine distance, that is, to provide a passage. Accordingly, as shown by the arrow, a radiation sound transmission and ventilation path is formed between the main and sub-magnets 7-1 and 8-1.

The above-described embodiments are merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains may make various modifications and variations of this embodiment within the scope not departing from the essential characteristics of the present invention. It will be appreciated that variations are possible.

Claims (12)

The woofer diaphragm, the first coil positioned between the central portion and the boundary of the woofer diaphragm, the main magnet disposed inside the first coil, and the main magnet extending through the center of the space formed by the magnet while covering the upper part of the main magnet A first support including a column, a sub-magnet installed outside the first coil, and a second support surrounding the sub-magnet from the outside,
A first screen is installed that extends to a height that covers the space between the upper surface of the second support and the lower part of the woofer diaphragm while covering the outer periphery of the second support, and has an open window for discharging water to the side thereof,
A woofer grill is installed on the woofer diaphragm, and a second screen extending from the woofer grill to a height that covers the space between the upper parts of the woofer diaphragm and having an open window for discharging water on the side is further installed. speaker. delete The method of claim 1,
A waterproof mesh is installed on the upper portion of the column of the first support to prevent water from entering the inside of the driver, a micro speaker. The method of claim 1,
The open windows of the first screen and the second screen are formed to be spaced apart from each other so as to be spaced apart from each other by a predetermined distance based on a cut line in the center direction of the speaker. The method of claim 1,
A tweeter diaphragm, a second coil disposed to enclose the lower portion of the column of the first support between the central portion and the boundary of the tweeter diaphragm, extends while supporting the lower surface of the main magnet while being spaced apart from the lower surface of the sub-magnet, and the rim is the tweeter diaphragm It includes a lower plate bent to be compressed around the perimeter of the
The outer surface of the lower plate is installed to face the inner surface of the second support with a predetermined distance therebetween to provide a water discharge path. 6. The method of claim 5,
Further comprising a ring structure having a flow path communicating a space (A) in which water discharged through the first and second screens is collected and a space (B) in which water is discharged through the outer surface of the lower plate , micro speaker. 6. The method of claim 5,
The second support is provided with a flow path communicating a space (A) in which water discharged through the first and second screens is collected and a space (B) in which water is discharged through the outer surface of the lower plate, micro speaker. delete delete A woofer diaphragm comprising a woofer diaphragm, an upper coil positioned between the central portion and the boundary of the woofer diaphragm, a main magnet disposed inside the upper coil, a sub-magnet installed outside the upper coil, and a tweeter diaphragm facing the woofer diaphragm In a micro speaker,
The microspeaker consists of an upper casing that covers the top of the driver and a lower casing that covers the rest of the structure. A woofer diaphragm with a pressurized rim is installed between the side rim of the upper casing and the auxiliary ring, and the center and boundary of the tweeter diaphragm. A cylindrical lower coil is disposed between them, the upper surface is in contact with the upper part of the main magnet and extends downward in a hollow cylindrical shape to be accommodated in the lower coil, and the upper surface of the cylinder includes a central supporter covered with a mesh and the main magnet. It supports the lower surface and includes a lower support body whose outer surface is in contact with the tweeter diaphragm and closes it,
First and second side supports continuously installed so as to be in contact with the lower surface of the lower support plate installed under the woofer diaphragm, the third side support in contact with the inner side of the upper surface of the sub-magnet, and adjacent to the third side support, the remaining upper surface outside of the sub-magnet and a fourth side support extending downward to cover the entire side surface and a fifth side support in contact with the lower surface of the lower support, the upper surface of which is in contact with the lower surface of the sub-magnet, and the lower surface of which is in contact with the bent lower surface of the lower casing; Micro speaker comprising: . delete 11. The method of claim 10,
The second lateral support, the fourth lateral support, and the fifth lateral support are installed to be spaced apart from the lower casing, and at least the fifth lateral support is spaced apart from the longitudinal centerline of the cross-section at a fine distance to provide a passageway. Micro, speaker.

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