KR102260763B1 - Drum safety filter structure adapted for 2way type microspeaker - Google Patents

Abstract

The present invention provides a two-way type microspeaker having a DSF structure for quickly and smoothly discharging high-pressure air present in an ear canal. The present invention discloses a path for directing air between the outside of a driver and an ear cap. According to the present invention, the quality, performance and marketability of the speaker can be improved and a user can be provided with a pleasant atmosphere. To this end, the microspeaker has the DSF structure including a side support supporting and surrounding a sub-magnet and a support casing pressing and supporting the outer surface of the side support, wherein an outside vent hole is formed on the upper surface of the support casing to discharge high-pressure air.

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 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, so the volume emitted from the diaphragm decreases and the sound quality is also reduced. 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, comprising: a side support supporting and surrounding a sub-magnet; and a support casing for pressing and supporting an outer surface of the side support, the support casing being vertically DSF (drum safety filter) structure, which includes an extended side surface and an externally extended upper surface to abut from the top of the side to the inner surface of the ear cap, and an external vent hole for discharging high-pressure air is formed on the upper surface of the support casing Eggplant provides a 2-way type micro speaker.

A block for ventilation of a predetermined volume is further formed on the inside of the ear cap, and the block comes into contact with the side of the support casing under the ear cap and extends upward to support it, and at the upper end of the block side of the support casing. It includes a block upper surface extending horizontally so as to abut and support the upper surface from the lower surface, and the block is installed on the opposite side at a predetermined distance from the longitudinal centerline to provide a path through which high-pressure air flows through the entire cut surface.

A fourth ventilation amount control mesh may be installed on the external ventilation hole.

In addition, the present invention provides 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 the woofer diaphragm. In the microspeaker including a tweeter diaphragm opposite to the diaphragm, a block having a side extending upward while pressing the sub-magnet from the outside, and an upper surface continuously extending outward from the top of the side to the inner surface of the ear cap is installed; , It provides a 2-way type micro speaker having a DSF (drum safety filter) structure, in which a ventilation channel is formed in the inside of the block to penetrate the entire height of the block and communicate to the upper surface.

It may further include an upper housing coupled to the upper portion of the ear cap, 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 coupled to the upper portion of the ear cap, and a woofer grill providing a hardware mounting space by dividing the space of the upper housing in the lower portion of the upper housing may be integrally injection-molded.

In addition, the present invention provides 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 woofer diaphragm facing the woofer diaphragm. A micro-speaker including a tweeter diaphragm, wherein the micro-speaker has an upper casing that covers the upper part of the driver and a lower casing that covers the rest of the structure, and a woofer diaphragm with an edge pressed between the side edge of the upper casing and the auxiliary ring is installed, and 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 a hollow cylindrical shape to be accommodated in the lower coil, and on the upper surface of the cylinder It provides a micro-speaker of a 2-way type, including a central support covered with a mesh, 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 the tweeter diaphragm.

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.

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 cross-sectional view of the microspeaker according to the second embodiment of the present invention for explaining the woofer grill, cut from the center in the longitudinal direction;
8 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
9 is a view of the microspeaker according to the third 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.

<Example 1 - Overall Structure>

First, the basic structure of the microspeaker 1 of the present invention 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. A ring-shaped 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 has 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 installed on the opposite side (not shown), a space or an open window that is twice the size of the interval 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 .

The present invention is characterized in that a DSF path is formed between the microspeaker inner module and the upper housing 100 and the ear cap 200 as in the following embodiment on the premise of the above structure.

<Example 1 - External pass-through DSF structure>

1 and 2, the support casing 42 of the present invention supports the entire outer surface of the side support body 40 by pressing. The support casing 42 includes a side surface 42a extending vertically and having a lower end bent inward, and an upper surface 42b horizontally extending outward from the upper end of the side surface 42a. 3, the upper surface 42b extends beyond the first airflow control mesh M1 to the step surface of the ear cap 200, and the external ventilation hole 42c is located beyond the microspeaker internal module. is formed A fourth ventilation amount control mesh (M4) is installed on the external ventilation hole (42c).

A block 204 for ventilation of a predetermined volume is formed inside the ear cap 200 of the present invention. The block 204 has a side surface 204a extending upward to abut and support the side surface 42a at the bottom of the ear cap 200, and the upper surface 42b at the upper end of the side surface 204a to abut from the bottom to support it. and a horizontally extending upper surface 204b. The block 204 is also spaced apart from the longitudinal centerline like the first divided support 18, and since the block 204 of the same structure is also installed on the opposite side (not shown), the entire illustrated front surface of the block 204 is subjected to high pressure. It provides a path for air to flow.

Accordingly, the air introduced through the sound outlet 202 of the ear cap 200 passes through the divided space of the block 204 providing a relatively wide channel and accelerates while passing through the external vent hole 42c having a relatively narrow diameter. After being diffused (Bernulli's Law), it is discharged to the outside through the second airflow control mesh M2 of the upper housing 100 .

The above-described module external high-pressure air outlet structure of the present invention may be installed as in the embodiment described with reference to FIGS. 1 to 3 to provide various outflow paths of high-pressure air, but of course, the outflow of high-pressure air into the module Of course, other suitable variants that do not provide a path at all are also applicable.

In addition, the ventilation block 204 may be manufactured integrally with the ear cap 200 or provided as a separate part.

<Example 2 - Overall structure and external pass-through DSF structure>

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 second embodiment of the present invention cut from the center in the longitudinal direction, FIG. 5 is a front view, and FIG. 6 is a view in which the upper housing 100 and the ear cap 200 are combined. It is a front view of the microspeaker 1 of the second embodiment of the present invention, cut from the center in the longitudinal direction.

The second embodiment is different from the previous embodiment by deleting the side support 40 and the support casing 42, and extending the block 204 installed in the ear cap 200 to the inside of the driver module to replace these roles that was made to do. That is, the side surface 204a of the block 204 extends while pressing the sub-magnet 30 and the upper plate 34 from the outside, and the upper surface 204b is the step surface of the ear cap 200 from the upper end of the side surface 204a. continues to extend outward until airtight contact with the A ventilation channel 204c communicating through the entire height of the block 204 to the portion of the upper surface 204b occupying an area beyond the first ventilation amount control mesh M1 is formed in the block 204 . A fourth ventilation amount control mesh (M4) is installed on the upper opening of the ventilation channel (204c).

The block 204 of the second embodiment is not divided and installed at intervals unlike the first embodiment, because the ventilation channel 204c exists inside the body.

In the second embodiment of the present invention, the air introduced through the sound outlet 202 of the ear cap 200 escapes through the ventilation channel 204c, which is a relatively narrow flow path, and is diffused, and then the first of the upper housing 100 is removed. 2 It is discharged to the outside through the ventilation amount control mesh (M2).

The above-described module external high-pressure air outlet structure of the present invention may be installed as in the embodiment described with reference to FIGS. 4 to 6 to provide various outflow paths of high-pressure air, but of course, the outflow of high-pressure air into the module Of course, other suitable variants that do not provide a path at all are also applicable.

Next, the installation structure of the woofer grill 1000 applicable to all embodiments of the present invention will be described with reference to FIGS. 7 to 8 based on the second 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 discharge high-pressure air through the outlet hole of the upper housing 100 without entering the woofer grill 1000 in relation to the above-described embodiment of the present invention.

<Example 3>

Next, FIG. 9 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 (9)

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 for supporting and enclosing the sub-magnet, and a support casing for supporting by pressing the outer surface of the side support, wherein the support casing is externally in contact with a side surface extending vertically and from the upper end of the side to the inner surface of the ear cap It includes an extended upper surface, and an external ventilation hole for discharging high-pressure air is formed on the upper surface of the support casing,
It further includes an upper housing coupled to the upper part of the ear cap, and the lower part of the upper housing divides the space of the upper housing and integrally injection-molded the woofer grill to provide a hardware mounting space, having a DSF (drum safety filter) structure. , 2-way type micro speaker. The method of claim 1,
A block for ventilation of a predetermined volume is further formed inside the ear cap, and the block comes into contact with the side of the support casing under the ear cap and extends upward to support it, and at the top of the block side, the block side of the support casing DSF (drum safety filter) comprising a block upper surface extending horizontally so as to abut and support the upper surface from the lower surface, and the block is installed on the opposite side at a predetermined distance from the longitudinal centerline to provide a path through which high-pressure air flows through the entire cut surface ) structure, 2-way type micro speaker. 3. The method of claim 2,
A 2-way type micro speaker with a DSF (drum safety filter) structure with a fourth airflow control mesh installed on the external ventilation hole. 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 block having a side extending upward while pressing the sub-magnet from the outside, and an upper surface continuously extending outward from the upper end of the side to the inner surface of the ear cap is installed, and the inside of the block penetrates the entire height of the block. Forming a ventilation channel communicating up to the upper surface,
It further includes an upper housing coupled to the upper part of the ear cap, and the lower part of the upper housing divides the space of the upper housing and integrally injection-molded the woofer grill to provide a hardware mounting space, having a DSF (drum safety filter) structure. , 2-way type micro speaker. 5. The method of claim 1 or 4,
DSF (drum safety) further comprising an upper housing coupled to the upper portion of the ear cap, and a second airflow control mesh (M2) is installed on one side of the upper housing to form an outlet hole communicating with the outside and cover the outlet hole filter) structure, 2-way type micro speaker.

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