KR102260762B1 - Drum safety filter structure adapted for 2way type microspeaker - Google Patents

Abstract

The present invention provides a microspeaker of a 2 way type having a DSF structure capable of quickly and smoothly discharging high-pressure air present in the ear canal. The present invention discloses a path for guiding air to the inside of a driver and a path for guiding air to the outside of the driver. According to the present invention, a quality, performance, and marketability of the speaker can be improved, and may provide a pleasant atmosphere to the user.

Description

DSF structure of 2way type microspeaker {Drum safety filter structure adapted for 2way type microspeaker}

The present invention relates to a 2-way type micro speaker having a DSF (drum safety filter) of the 2-way type micro speaker, that is, a safety filter capable of effectively discharging high-pressure air formed inside the ear to protect the vibration drum of the ear.

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.

When the ear cap including the speaker's sound outlet is inserted into the ear canal, the ear is blocked from the outside except for the speaker, so high pressure is generated in the ear canal and the high-pressure air flows back into the speaker. There is a problem of deterioration. The wearer also tends to feel uncomfortable, and long-term high pressure may irritate the drum part of the ear and damage the sensitive function.

As a prior art for solving this problem, Utility Model Registration No. 20-0245053 discloses a structure for discharging high-pressure air by providing vent holes on the outer periphery of the ear cap. Korean Patent No. 10-1863540 of the applicant forms a vent hole directly in the center of the diaphragm so that high-pressure air passing through the vent hole flows along both sides of the driver and is discharged. Another Korean Patent No. 10-1958257 of the applicant discloses a structure in which the sound outlet is formed on the side of the driver rather than the front, so that the high-pressure air inside the ear flows and is discharged laterally along the top of the diaphragm without changing the path. . From a different point of view, for example, Korean Patent Laid-Open No. 10-2019-5816 discloses a technology for directly adjusting the air pressure by measuring the pressure inside the ear.

However, recently, a 2-way hybrid speaker that simultaneously implements the woofer-tweeter function has been developed, and therefore it is necessary to construct a DSF path having a structure different from that of the conventional single type speaker.

The inventors have developed a microspeaker capable of efficiently discharging high-pressure air inside the ear in consideration of the above environment.

Therefore, an object of the present invention is to provide a 2-way type microspeaker having a DSF structure that can quickly and efficiently induce high-pressure air inside the ear and discharge it to the outside.

In order to achieve the above object, the present invention provides a woofer diaphragm, a first coil positioned between a central portion and a boundary of the woofer diaphragm, a main magnet disposed inside the first coil, and a sub-magnet installed outside the first coil. and a tweeter diaphragm facing the woofer diaphragm, wherein a side support supports and surrounds a sub-magnet, an upper portion supports an edge of the woofer diaphragm, and a lower portion is in contact with an upper surface of the side support and high pressure air It provides a micro speaker of a 2-way type having a DSF (drum safety filter) structure having a first divided support in which an open window of a predetermined size is formed so that it can flow out.

It includes a lower support that supports the entire lower surface of the main magnet and closely presses the edge of the tweeter diaphragm, and the inner surface of the side support is spaced a predetermined distance from the outer end of the lower support to provide an inlet hole for high-pressure air.

A second divided support having an open window of a predetermined size may be provided so that the high-pressure air introduced through the inlet hole flows into the space between the main magnet and the sub-magnet.

At the end of the space formed by the first divided support, a first airflow control mesh capable of outflow of air may be installed.

In addition, the present invention provides a woofer diaphragm, a first coil positioned between a central portion and a boundary portion of the woofer diaphragm, a main magnet disposed inside the first coil, a sub-magnet installed outside the first coil, and the woofer A micro speaker comprising a tweeter diaphragm facing the diaphragm, comprising: a lower support that closely presses the edge of the tweeter diaphragm; a side plate that surrounds and presses the outer surface of the sub-magnet; The end of the lower surface bent inward is spaced apart from the outer surface of the lower support and has a DSF (drum safety filter) structure having an outer casing having an inlet hole of a predetermined size through which high-pressure air is introduced, a 2-way type micro speaker to provide.

By installing a third divided support to occupy at least a portion of the space between the inner surface of the outer casing and the outer surface of the side plate while closely surrounding the side plate from the outside, a channel through which the high-pressure air introduced through the inlet hole flows is provided and , It is possible to form an outlet hole of a predetermined size on the side of the outer casing, and cover the outlet hole with a third airflow control mesh.

It may further include an upper housing, an ear cap coupled to the upper housing and providing a sound outlet, and a second airflow control mesh may be installed on one side of the upper housing to form an outlet hole communicating with the outside and cover the outlet hole. .

It further includes an upper housing, an ear cap coupled to the upper housing and providing a sound outlet, and a woofer grill that divides the space of the upper housing to provide a space for hardware mounting may be integrally injection-molded in the lower part of the upper housing.

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 of a 2-way type, including a central support covered with and a lower support that supports the lower surface of the main magnet and closes the outer surface of the tweeter diaphragm in contact with it.

The present invention exhibits the effect of providing a speaker having a DSF structure capable of quickly and smoothly discharging high-pressure air from the ear in a 2-way microspeaker.

The present invention has the effect of providing a microspeaker having a DSF structure that induces high-pressure air not only inside the driver but also outside.

According to the present invention, it is possible to improve the quality, performance and marketability of the speaker and provide a pleasant atmosphere to the user.

1 is a perspective view of a microspeaker according to a first embodiment of the present invention, cut from the center in the longitudinal direction;
Fig. 2 is a front view of Fig. 1;
3 is a front view of the microspeaker of FIG. 1 in which the upper housing and the ear cap are combined, cut from the center in the longitudinal direction;
4 is a perspective view of a microspeaker according to a second embodiment of the present invention, cut from the center in the longitudinal direction;
Fig. 5 is a front view of Fig. 4;
6 is a front view of the microspeaker of FIG. 4 in which the upper housing and the ear cap are combined, cut from the center in the longitudinal direction;
7 is a perspective view of the microspeaker according to the first embodiment of the present invention for explaining the woofer grill, cut from the center in the longitudinal direction;
Fig. 8 is a front view of Fig. 7;
9 is a front view of the microspeaker of FIG. 7 in which the upper housing and the ear cap are combined, cut from the center in the longitudinal direction; And
10 is a front view of a microspeaker according to another embodiment of the present invention, cut from the center in the longitudinal direction.

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.

Hereinafter, the structure of the drum safety filter (DSF) of the micro speaker of the present invention will be described with reference to the drawings. The DSF structure of the microspeaker 1 of the present invention is characterized in that it uses the inner or outer space of the driver to discharge high-pressure air, and each case will be described.

FIG. 1 is a perspective view of a microspeaker 1 of the present invention cut from the center in the longitudinal direction, and FIG. 2 is a front view.

The microspeaker 1 of the present invention is a hybrid type of 2 way type, and the woofer diaphragm 20 is disposed on the upper part, and the tweeter diaphragm 24 is disposed on the lower part. A sound is emitted below the tweeter diaphragm 24 .

A disk-shaped cover 10 having a circular hole 12 formed in the center is positioned above the microspeaker 1 . Based on the woofer diaphragm 20, the upper support plate 14 is positioned above and the support ring 62 is positioned on the lower part. The upper support plate 14 covers the whole of the woofer diaphragm 20, and the rim 14a extending horizontally from the end of the side extending downward surrounds the dome-shaped portion relatively outside of the woofer diaphragm 20 to the outside. The edge (20a) located at the top is press-compressed. The support ring 62 pressurizes the rim 20a from the bottom. An annular band-shaped protective plate 16 is installed to surround the outer surface of the support ring 62 and the upper support plate 14 and extend to the lower surface of the cover 10 . As described above, since the woofer diaphragm 20 is tightly supported and closed by various members, it has a structure in which water or high-pressure air from the ear does not flow out through the center of the woofer diaphragm 20 as well as the outside thereof.

A first divided support 18 for supporting the support ring 62 from the lower surface is installed in the lower portion of the support ring 62 in a semi-ring shape. The first divided support 18 is installed such that a gap d exists with respect to the longitudinal center line as shown in FIG. 1 . Since the first divided support 18 of the same structure is also installed on the other side (not shown), a space or an open window that is twice the size of the interval d is provided as a whole. Then, high-pressure air flows through this space and is discharged.

A first coil 22 is installed at the boundary of the woofer diaphragm 20 . A main magnet 28 is disposed inside the first coil 22 , and a sub magnet 30 is disposed outside the first coil 22 . The upper plate 34 is installed on the upper part of the sub-magnet 30 .

Based on the tweeter diaphragm 24, the second coil 26 is installed at the boundary to extend upward.

The micro speaker 1 of the present invention has a main body 104 supporting the upper surface of the main magnet 28, and a pupil extending downward from the center of the main body 104 and disposed inside the second coil 26. It has a central support body (100c) comprising a formed column (102).

The tweeter diaphragm 24 has a first edge (24a) and a first edge (24a) positioned on the inside than the first edge (24a) and the first edge (24a) positioned on the outer side when viewed in a plan view by bending the outer edge twice around the relatively outer dome-shaped part. 2 edges 24b are provided. The micro speaker 1 of the present invention has a first edge portion 32a and a first edge portion 32a that are bent twice while supporting the entire lower surface of the main magnet 28 and positioned outside in a plan view. ) to provide a lower support body (32) having a second edge portion (32b) located on the inner side. Each edge of the tweeter diaphragm 24 is pressed into tight contact with each edge portion of the lower support. Accordingly, as previously described with respect to the woofer diaphragm 20, the tweeter diaphragm 24 also has a structure in which water or high-pressure air is not introduced or discharged through the outside as well as the center thereof.

In the present invention, as shown in FIG. 2, the side support 40 has an upper surface 40b in contact with the first divided support 18 and an inner surface 40a with a sub-magnet 30 and an upper plate 34 and It extends downward while in contact and is spaced apart from the outer end of the lower support 32 by a predetermined distance to provide an inlet hole. Since both ends of the edge of the tweeter diaphragm 24 are located inside the outer surface of the sub-magnet 30, it can be said that the inlet hole is provided naturally. Reference numeral 42 denotes a support casing for reinforcing the side support body 40 from the outside.

In the present invention, as shown in FIG. 2 , the second divided support 70 is installed in a semi-ring shape between the lower surface of the sub-magnet 30 and the upper surface of the lower support 32 . The second divided support 70 is also installed such that a predetermined interval exists with respect to the longitudinal centerline, like the first divided support 18 . Since the second divided support 70 of the same structure is also installed on the opposite side (not shown), a space or an open window that is twice the size of the interval as a whole is provided. And, the high-pressure air that has entered through the inlet hole between the lower support 32 and the side support 40 through this space flows upward. If the second divided support 70 is in the form of a continuous ring or plate that is not separated like other members, it will be understood that even if air enters through the inlet hole, it cannot proceed upward.

In the present invention, the lower end of the protective plate 16 does not extend to the first divided support 18, and thus a space equal to the height of the first divided support 18 is formed between the side support 40 and the upper surface. A first ventilation amount control mesh (M1) capable of outflow of air is installed on the outside of this space.

3 is a front view of the microspeaker 1 of the present invention in which the upper housing 100 and the ear cap 200 are combined, cut from the center in the longitudinal direction. A sound outlet 202 is formed in the lower center of the ear cap 200 . On one side of the upper housing 100 , an outlet hole communicating with the outside is formed and a second airflow control mesh M2 is installed to cover the outlet hole.

Based on the above description, the outflow path of the high-pressure air formed in the ear will be described with reference to FIG. 3 as follows.

The air introduced through the sound outlet 202 of the ear cap 200 enters through the hole between the side support 40 and the lower support 32, and flows through the space provided by the second divided support 70. It proceeds upward through the space between the main magnet 28 and the sub-magnet 30 and gathers. And it passes through the first airflow control mesh M1 along the path provided by the first divided support 18 and is discharged to the outside through the second airflow control mesh M2 of the upper housing 100 .

Next, a second embodiment of the DSF structure of the micro speaker of the present invention will be described with reference to FIGS. 4 to 6 .

4 is a perspective view of the microspeaker 1 of the present invention cut from the center in the longitudinal direction, FIG. 5 is a front view, and FIG. 6 is a microspeaker of the present invention in which the upper housing 100 and the ear cap 200 are combined. (1) is a front view viewed from the center in the longitudinal direction.

The second embodiment is different from the previous embodiment in that high-pressure air is discharged to the outside of the driver without passing through the inside of the driver. The upper surface of the main magnet 28 is supported by the main upper plate 28a, and the central support 100c does not exist. The height of the main magnet 28 and the sub-magnet 30 is the same, therefore, as in the first embodiment, the height to install the second division support 70 is insufficient, and if the space is forcibly formed, the volume of the speaker is excessively increased. do. In this structure, it is reasonable to exhaust the high-pressure air to the outside of the driver.

Accordingly, in the second embodiment of the present invention, the lower support member 32 seals the rim of the tweeter diaphragm 24 . The side plate 400 encloses and seals the outer surfaces of the sub-magnet 30 and the upper plate 34 . Therefore, the high-pressure air cannot enter the inside of the driver.

A large columnar outer casing 300 is installed to surround the entire outer surface of the microspeaker 1 . The outer casing 300 is installed so that its side surface 302 is spaced apart from the side plate 400, and the end of the inner curved lower surface 304 is spaced apart from the outer surface of the lower support body 32 to have an inflow of a predetermined size. A hole 312 is formed. The side 302 is formed with an outlet hole of a predetermined size, and the outlet hole is covered with a third airflow control mesh (M3).

However, since this structure alone has a limitation in rapidly discharging high-pressure air, the present invention further installs the third divided support 500 . The third divided support 500 occupies at least a portion of the space between the inner surface of the outer casing 300 and the outer surface of the side plate 400 while enclosing the side plate 400 in close contact with the outer surface of the side plate 400 . installed to do The third divided support 500, like the first and second divided supports 18 and 70, is installed such that a predetermined interval exists based on the longitudinal centerline to provide a narrow channel through which high-pressure air flows. The upper part 502 having a thick portion on the third divided support 500 closes the space between the upper surface of the side plate 400 and the support ring 62 to prevent high-pressure air from flowing through the upper empty gap At the same time, the woofer diaphragm 20 is more firmly supported.

When the outflow path of the high-pressure air formed in the ear is described with reference to FIG. 6 based on the above description, the air introduced through the sound outlet 202 of the ear cap 200 enters through the inlet hole 312 and is divided into a third The support 500 flows through a long channel provided in the height direction and passes through the third airflow control mesh M3 of the outer casing 300 and is discharged to the outside.

The DSF structure of the second embodiment of the present invention can be appropriately changed and applied to any internal structure of the driver other than those shown in the drawings.

Next, an installation structure of the woofer grill 1000 applicable to all embodiments of the present invention will be described with reference to FIGS. 7 to 9 based on the first embodiment.

Referring to these drawings together, a woofer grill 1000 is installed in the lower portion of the upper housing 100 to divide the space of the upper housing 100 while closely supporting the protection plate 16 from above, so that the upper surface of the woofer grill 1000 is installed. A fairly large space is provided between and the upper housing 100 . In this space, hardware components such as a Bluetooth battery and a PCB are mounted to achieve high density and compactness of the microspeaker 1 .

The joint portion 1002 of the woofer grill 1000 in contact with the upper housing 100 is formed to be hermetically sealed. For this purpose, a method of caulking or bonding may be used, but in the present invention, the woofer grill 1000 is injection molded integrally with the internal parts of the microspeaker 1 such as the upper housing 100 or the protective plate 16 , for example. It is preferable to do The sealing structure of the woofer grill 1000 contributes to preventing moisture such as water from penetrating into hardware such as a Bluetooth battery and PCB.

In particular, the woofer grill 1000 helps to quickly exhaust the high-pressure air through the outlet hole of the upper housing 100 without being diffused into the woofer grill 1000 in relation to the above-described embodiment of the present invention.

Next, FIG. 10 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, the woofer vibration ohm is transmitted to the lower portion or a passage through which the high-pressure air formed in the external auditory meatus flows out is formed.

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 (11)

A woofer diaphragm, a first coil positioned between a center portion and a boundary of the woofer diaphragm, a main magnet disposed inside the first coil, a sub-magnet installed outside the first coil, and a tweeter diaphragm facing the woofer diaphragm In a micro speaker comprising:
A side support supporting and surrounding the sub-magnet, an upper portion supporting the edge of the woofer diaphragm, a lower portion in contact with the upper surface of the side support, and a first divided support having an open window of a predetermined size so that high-pressure air can flow out and,
DSF (drum) which supports the entire lower surface of the main magnet and closely presses the edge of the tweeter diaphragm, and the inner surface of the side support is spaced apart from the outer end of the lower support by a predetermined distance to provide an inlet hole for high-pressure air Safety filter) structure, 2-way type micro speaker. delete The method of claim 1,
A two-way type micrometer having a DSF (drum safety filter) structure having a second divided support formed with an open window of a predetermined size so that the high-pressure air introduced through the inlet hole can flow into the space between the main magnet and the sub-magnet speaker. 4. The method of claim 3
A 2-way type micro speaker having a DSF (drum safety filter) structure in which a first airflow control mesh capable of air outflow is installed at the end of the space formed by the first divided support. A woofer diaphragm, a first coil positioned between a center portion and a boundary of the woofer diaphragm, a main magnet disposed inside the first coil, a sub-magnet installed outside the first coil, and a tweeter diaphragm facing the woofer diaphragm In a micro speaker comprising:
A lower support that closely presses the edge of the tweeter diaphragm, a side plate that surrounds and presses the outer surface of the sub-magnet, and the side is installed so as to be spaced apart from the side plate. A 2-way type micro speaker having a DSF (drum safety filter) structure having an outer casing that is spaced apart and has an inlet hole of a predetermined size through which high-pressure air is introduced. 6. The method of claim 5,
By installing a third divided support to occupy at least a portion of the space between the inner surface of the outer casing and the outer surface of the side plate while closely surrounding the side plate from the outside, a channel through which the high-pressure air introduced through the inlet hole flows is provided, and , Forming an outlet hole of a predetermined size on the side of the outer casing, and covering the outlet hole with a third airflow control mesh (M3), having a DSF (drum safety filter) structure, a 2-way type micro speaker. 6. The method of claim 1 or 5,
It further includes an upper housing, an ear cap coupled to the upper housing and providing a sound outlet, and a second airflow control mesh (M2) that forms an outlet hole communicating with the outside on one side of the upper housing and covers the outlet hole. A 2-way type micro speaker with a DSF (drum safety filter) structure installed. 6. The method of claim 1 or 5,
The DSF (DSF), which further comprises an upper housing and an ear cap coupled to the upper housing and providing a sound outlet, and integrally injection-molded with a woofer grill that divides the space of the upper housing to provide a hardware mounting space in the lower part of the upper housing. Drum safety filter) structure, 2-way type micro speaker.


delete delete delete

Images