KR20180036640A - Earphone housing for shielding outer sound and earphone having the same - Google Patents

Abstract

An earphone including an earphone housing of an external sound shielding and switching structure is disclosed. The earphone according to the present invention includes the earphone housing including: a housing body including an external sound transmission path and a sound source part; an external sound shielding and switching unit which is provided in the housing body and selectively shields the external sound transmission path; and an ear cap which is combined with the housing body and transmits at least one of an external sound and a sound source generated in the sound source part. Accordingly, the present invention can prevent a negligent accident by selectively shielding the external sound.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an earphone including an earphone housing of an external sound shielding switching structure,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earphone housing and an earphone. More particularly, the present invention relates to an earphone housing for selectively shielding an external sound and minimizing a change in a basic structure of a conventional earphone housing, Earphone.

In general, there are two ways in which humans can hear sound: air conduction and bone conduction.

Among them, the air conduction method transmits the vibration of the sound to the ear drum in the ear, and the vibration of the ear drum is transmitted to the screw worm through the three bones in the ear .

The wah is filled with a liquid called lymph fluid. The vibration of the liquid is converted into an electric signal, which is transmitted to the auditory nerve, and the human brain recognizes the sound.

Next, the bone conduction method omits the process of the vibration through the tympanic membrane and the osseol in the voice recognition mechanism, and the vibration of the voice is sent directly to the wah through the skull, so that even if the hearing loss is abnormal in the tympanic membrane or the ossicular bone, To the user.

Various kinds and forms of bone conduction earphones have been developed. Most bone conduction earphones include a frame that forms an appearance, a voice coil which is provided inside the frame and forms a magnetic field when an electrical signal is applied, At least a pair of magnets which interact with each other by a magnetic field to vibrate at a predetermined frequency, and a vibrating body for transmitting vibrations of the pair of magnets to the human body.

Accordingly, when an electrical signal is applied to the voice coil, a magnetic field proportional to the intensity of the electrical signal is formed in the voice coil, and the magnet interacts with the magnet so that the magnet oscillates with a predetermined frequency in the vertical direction. These vibrations are outputted through the vibrating body and transmitted to the human body, so that the human body recognizes a predetermined acoustic signal.

On the other hand, the air conduction type earphone and the headphone can not hear the outside noise by using the ears. Therefore, in the developed countries, the air conduction type earphone and the headphone which are used to block the ears are used, And so on.

In addition, the recent proliferation of digital sound and communication devices has increased the number of noise-induced hearing loss in adolescents around the world. In the age of global aging, the increase in the degree of senile hearing is also socially problematic. As a result, It is the present situation.

Therefore, the bone conduction speaker can prevent the hearing loss by using the bone conduction principle without the direct effect on the tympanic membrane, as it prevents the safety accident by receiving the ambient noise at the same time by using the ear by opening the ear.

The above-described technical structure is a background technique for assisting the understanding of the present invention, and does not mean the prior art widely known in the technical field to which the present invention belongs.

Korean Patent Registration No. 10-1039107 (Hiriya Co., Ltd.) 2011. 05. 30.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a headphone which selectively shields external sounds to prevent safety accidents, selectively applies to earphones of an air conduction type and a bone conduction type, The present invention provides an earphone including an earphone housing of an external sound shielding switching structure which can minimize the change of the basic structure of the housing.

According to the present invention, there is provided an electronic musical instrument comprising: a housing body having an external sound transmission passage and a sound source portion; An external sound shield switching part provided on the housing body to selectively shield the external sound transmission path; And an earphone housing coupled to the housing body and including an ear cap for transmitting at least one of a sound source generated from the sound source unit and an external sound, wherein the external sound shield switching unit includes a closed flange and a plurality of position fixing grooves A shielded switching body provided; An elastic body disposed between the closed flange and the housing body to apply an elastic force to the shielded switching body; And a position fixing member for fixing the shielding switching body by selectively engaging with the plurality of position fixing grooves, wherein the one side portion is coupled to the housing body and the other side portion is positionally fixed to the plurality of position fixing grooves.

Preferably, the housing body includes: a protrusion having the shielding switching body disposed therein and provided with an external sound inlet hole; The external sound transmission passage for transmitting an external sound introduced through the external sound inlet hole to the ear cap; A sound source transmission passage for transmitting a sound source generated from the sound source section to the ear cap and isolated from the external sound transmission passage; A lifting / lowering space provided as a lifting / lowering space of the shielded switching body and provided as a connection path between the external sound transmission passage and the sound source transmission passage; And the sound source unit disposed inside the housing body between the sound source transmission passage and the up / down space unit.

According to another aspect of the present invention, there is provided an electronic musical instrument comprising: a housing body having an external sound transmission passage and a sound source portion; An external sound shield switching part provided on the housing body to selectively shield the external sound transmission path; And an earphone housing coupled to the housing body and including an ear cap for transmitting at least one of a sound source and an external sound generated by the sound source unit, wherein the external sound shield switching unit is rotatably provided on the housing body A shielding switching body having a shielding hole for introducing an external sound into the inside of the housing body; And an engaging member provided on the shielding switching body and engaged with the housing body.

Preferably, the housing body includes: a rotation guide groove portion provided on an upper side of the housing body to guide rotation of the shielded switching body; An external sound transmission passage communicated with the shielding hole to transmit an external sound to the ear cap; A sound source transmission passage for transmitting a sound source generated from the sound source section to the ear cap and isolated from the external sound transmission passage; A coupling hole provided in the rotation guide groove and engaging the coupling member; And the sound source portion disposed inside the housing body between the sound source transmission passage and the engagement hole.

Further, according to the present invention, there is provided a sound output apparatus comprising: a housing body having an external sound transmission path and a sound source unit; An external sound shield switching part provided on the housing body to selectively shield the external sound transmission path; And an earphone housing coupled to the housing body and including an ear cap for transmitting at least one of a sound source generated from the sound source unit and an external sound, wherein the external sound shield switching unit includes an electromagnet provided on the protrusion of the housing body, ; An elastic body disposed between the electromagnet and the bottom of the protrusion; And a shielding valve disposed at the bottom of the protrusion for selectively shielding an external sound inlet hole provided at the bottom of the protrusion by the electromagnet and a side of the elastic body contacting the earlobe.

Embodiments of the present invention can provide an external sound transmission passage in a housing body and an external sound shield switching part selectively shielding an external sound transmission path to the housing body to selectively prevent external sound to prevent a safety accident , An air conduction type and a bone conduction type earphone, respectively. In addition, it is possible to minimize the time and cost of changing the basic structure of the existing earphone and earphone housing when applied .

1 is a perspective view schematically showing an earphone housing of an earphone according to a first embodiment of the present invention.
2 is an exploded perspective view of FIG.
3 is a cross-sectional view of Fig.
4 is a cross-sectional view illustrating that the shielding switching body shown in FIG. 3 is lowered and the external sound transmission path is shut off.
5 is a perspective view schematically showing an earphone housing of an earphone according to a second embodiment of the present invention.
6 is a partial cutaway perspective view of FIG.
7 is a partially cutaway perspective view showing that the shielding switching body shown in FIG. 6 is lowered and the external sound transmission passage is cut off.
8 is a perspective view schematically showing an earphone housing of an earphone according to a third embodiment of the present invention.
9 is a partially cutaway perspective view showing that the shielded switching body shown in FIG. 8 is rotated at a predetermined angle in a clockwise direction.
10 is a partially cutaway perspective view showing that the shield switching body shown in FIG. 9 is rotated clockwise by a predetermined angle to open the external sound transmission passage.
11 is a perspective view schematically showing an earphone housing of an earphone according to a fourth embodiment of the present invention.
12 is a partial cutaway perspective view of Fig.
FIG. 13 is a partially cutaway perspective view showing that the shielding valve shown in FIG. 12 is raised and the external sound inlet hole is opened.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with one embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which the claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Unless defined otherwise, all terms (including technical and scientific terms) used herein are to be construed in a manner that is commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not to be interpreted ideally or excessively unless explicitly defined otherwise.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention. Like reference symbols in the drawings denote like elements.

FIG. 1 is a perspective view schematically showing an earphone housing of an earphone according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, FIG. 3 is a sectional view of FIG. 1, Sectional view showing that the shielded switching body is lowered and the external sound transmission passage is cut off.

As shown in these figures, the earphone housing 1 of the earphone according to the present embodiment includes a housing body 100, and an external sound source (not shown) provided on the housing body 100 for selectively shielding the external sound transmission passage 120. [ And a ear cap 300 coupled to the housing body 100 to transmit at least one of a sound source generated from the sound source unit 160 and an external sound.

1, the housing body 100 may be formed in a cylindrical shape, and may have various shapes such as a polygonal shape. This can be applied to other embodiments as will be described later.

3, the housing body 100 includes a plurality of shielding protrusions 110, which are provided on the outer surface of the housing body 100 and to which the shielding protrusions 211 are selectively coupled, An external sound transmission path 120 which is shielded by a shielding protrusion 211 provided on the shield switching body 210 and a sound source 120 which is provided to communicate with the external sound transmission path 120 and is generated by the sound source unit 160, A guide groove 140 connecting the plurality of shielding protrusions 110 to guide the shielding protrusions 211 up and down, And a sound source unit 160 provided inside the housing body 100 between the external sound transmission path 120 and the housing body hole 170. The sound source unit 160 is provided in the housing body 100 between the external sound transmission path 120 and the housing body hole 170, And a housing body hole 170 provided in the housing body 100 at a position close to the elastic body 220.

As shown in FIG. 3, the external sound transmission passage 120 of the housing body 100 is provided inwardly from one side of the housing body 100 and communicates with the confluent passage 130. Accordingly, the external sound introduced into the external sound transmission path 120 can be transmitted to the ear cap 300 through the confluent passage 130 and transferred to the interior of the user.

In this embodiment, the external sound transmission path 120 may be blocked or blocked by the shielding protrusion 211 provided on the lowered shielded switching body 210, as shown in FIG.

The sound source unit 160 of the housing body 100 may be a speaker used in an air conduction system or a known bone conduction unit used in a bone conduction system. This can be applied to the following embodiments as they are.

The guide groove 140 of the housing body 100 may be provided at a lower depth than the shielding protrusion groove 110 as shown in FIG.

The housing body hole 170 of the housing body 100 may be provided as an air passage so that the shielding switching body 210 can smoothly move up and down together with the shielding switching body hole 212 provided in the shielding switching body 210 .

As shown in FIGS. 3 and 4, the external sound shield switching unit 200 is provided to be capable of moving up and down (raised and lowered) to the housing body 100 to selectively block the external sound transmission passage 120 do.

3, the external sound shield switching unit 200 is provided to surround the upper surface of the upper portion of the housing body 100 and is lifted and raised in the height direction of the housing body 100, A shield switching body 210 selectively engaged with the groove 110 and the external sound transmission path 120 and a shield switching body 210 disposed between the housing body 100 and the shield switching body 210, And an elastic body 220 for imparting an elastic force.

The operation of the external sound shield switching unit 200 of the present embodiment will be described below.

3, the external sound transmission path 120 is opened when the shield switching body 210 is raised.

4, when the shielding switching body 210 is lowered, the elastic body 220 is contracted, and the shielding protrusion 211 blocks the external sound transmission passage 120, and the external sound is transmitted to the housing body 100). ≪ / RTI >

The cap 300 may be detached from the housing body 100 by engaging the coupling protrusion 310 provided in the housing 300 with the coupling groove 150 of the housing body 100 as shown in FIG.

The structure of this embodiment minimizes the change of the design basic structure of the earphone housing of the conventional earphone, thereby reducing the cost of further development and realizing a shielded switching structure.

FIG. 5 is a perspective view schematically illustrating an earphone phone housing according to a second embodiment of the present invention, FIG. 6 is a partial cutaway perspective view of FIG. 5, FIG. 7 is a cross- Is a partially cutaway perspective view showing that the sound transmission passage is cut off.

The earphone housing 1a of the earphone according to the present embodiment includes a housing body 100a and an external sound shield switching unit 200a which is provided on the housing body 100a and selectively shields the external sound transmission path 120a, And an ear cap 300a coupled to the housing body 100a for transmitting at least one of a sound source generated from the sound source unit 160 and an external sound.

5 and 6, the housing body 100a includes a protrusion 185 provided at an upper end and having an external sound inlet hole 187 and an external sound inlet hole 184 through the inside of the protrusion 185. [ An external sound transmission path 120a which communicates with the external cap 120 and communicates the external sound to the ear cap 300a by communicating with the external cap 120, A lifting and lowering space 190 provided in the housing body 100a of the protruded area to provide a space in which the shielding switching body 210a is lifted and accommodated and a coupling protrusion 310 of the cap 300a, And a sound source unit 160 provided between the sound source transmission passage 180 and the lifting and lowering space unit 190.

The external tone transmission passage 120a and the sound source transmission passage 180 of the housing body 100a are isolated from each other and do not mix with each other before being joined together in the cap coupling flow passage 320 as shown in Fig.

The lifting and lowering space 190 of the housing body 100a provides a space in which the shielding switching body 210a can be lifted and lowered and an external sound introduced through the external sound inlet hole 187 is supplied to the sound source transmission passage 180, As shown in FIG.

6 and 7, the external sound shield switching unit 200a includes a shield switching body 210a having a sealing flange 213 and a plurality of position fixing grooves 214, a sealing flange 213, An elastic body 220 disposed between the housing body 100a and the elastic body 220 to apply an elastic force to the shielding switching body 210a and a lower portion coupled to the housing body 100a, And a position fixing member 230 for fixing the shielded switching body 210a.

When the shielding switching body 210a of the external sound shield switching unit 200a is in the position shown in FIG. 6, the sealing flange 213 provided in the shielding switching body 210a is connected to the external sound inlet hole 187 and the sound source The external noise introduced through the external sound inlet hole 187 is not transmitted to the sound source transmission passage 180 by blocking the lifting and /

In this state, when the user presses the shielding switching body 210a, the shielding switching body 210a is released from the catch, and the shielding switching body 210a is moved up and down as shown in FIG. In this case, the external sound inlet hole 187 and the sound source transmission channel 180 may communicate with each other, and the external sound may be transmitted to the ear cap communication channel 320 through the sound source transmission channel 180.

6, the lower end portion of the upper sound insulating member of the external sound shield switching portion 200a is inserted into the bottom portion of the lifting and lowering space portion 190 and the upper end portion thereof is inserted into a pair of the position fixing grooves 214, And the position of the shielding switching body 210a is fixed.

In this embodiment, the position fixing member 230 may have a pin shape in which the upper end portion and the lower end portion are bent.

6, the cap 300a can be engaged with the coupling groove 150 of the housing body 100a by the coupling protrusion 310 provided on the inner wall, and the external sound transmission passage 120a, And a sound-communicating passage 180 are joined to each other.

FIG. 8 is a perspective view schematically illustrating an earphone housing of an earphone according to a third embodiment of the present invention, FIG. 9 is a partially cutaway perspective view showing the shielded switching body shown in FIG. 8 rotated clockwise And FIG. 10 is a partially cutaway perspective view showing that the shielding switching body shown in FIG. 9 is rotated clockwise by a certain angle to open the external sound transmission passage.

The earphone housing 1b of the earphone according to the present embodiment includes a housing body 100b and an external sound shield switching part 200b which is provided on the housing body 100b and selectively shields the external sound transmission path 120a, And an ear cap 300b coupled to the housing body 100b to transmit at least one of a sound source generated from the sound source unit 160 and an external sound.

9, the housing body 100b includes a rotation guide groove portion 195 which is provided on the upper side and guides the rotation of the shielding switching body 210b, and a rotation guide groove portion 195 which is provided to communicate with the shielding hole 215, An external sound transmission path 120a for transmitting sound to the cap 300b and a sound source transmission path 180 for transmitting the sound source generated from the sound source unit 160 to the ear cap 300b and isolated from the external sound transmission path 120a. An engaging hole 197 formed in the rotation guide groove 195 to engage with the engaging member 240 and an engaging groove 150 to which the engaging projection 310 of the ear cap 300b is engaged, And a sound source unit 160 disposed inside the housing body 100b between the sound source transmission passage 180 and the coupling hole 197.

9, the rotation guide groove portion 195 of the housing body 100b is provided on the upper surface portion of the housing oceans to guide the shield switching body 210b to rotate smoothly.

9, a coupling hole 197 is formed in the rotation guide groove portion 195 in this embodiment, and a hook-shaped coupling member 240 is inserted into the coupling hole 197, .

The external sound shield switching portion 200b is rotated clockwise to selectively block the external sound transmission path 120a, as shown in Figs.

9, the external sound shield switching unit 200b includes a shielding hole 215 (see FIG. 9) that is rotatably provided on the housing body 100b and allows external noise to flow into the interior of the housing body 100b And a coupling member 240 provided on the shielding switching body 210b and hooked to the housing body 100b and having a hook shape.

The operation of the external sound shield switching unit 200b will be described below.

First, in the state shown in FIG. 8, the sound source transmission passage 180 is blocked, and no external sound is transmitted to the sound source transmission passage 180.

In this state, when the shield switching body 210b is rotated in the clockwise direction in the order shown in Figs. 9 and 10, the shielding hole 215 and the sound source transmission passage 180 are communicated with each other as shown in Fig. 10 The external sound may be transmitted to the ear cap confluence passage 320 through the sound source delivery passage 180.

In this embodiment, the shielding switching body 210b can be rotated clockwise or counterclockwise, and the user can conveniently rotate the shielding switching body 210b using the gripping member 216. [

9, the cap 300b can be engaged with the coupling groove 150 of the housing body 100b by the coupling protrusion 310 provided on the inner wall, and the external sound transmission passage 120a can be engaged with the coupling groove 150 of the housing body 100b. And a sound-communicating passage 180 are joined to each other.

FIG. 11 is a perspective view schematically showing an earphone housing of an earphone according to a fourth embodiment of the present invention, FIG. 12 is a partial cutaway perspective view of FIG. 11, Is a partially cutaway perspective view showing that the inflow hole is opened.

The earphone housing 1c of the earphone according to the present embodiment includes a housing body 100c and an external sound shield switching part 200c provided on the housing body 100c to selectively shield the external sound transmission path 120c, And an ear cap 300c coupled to the housing body 100c for transmitting at least one of a sound source generated from the sound source unit 160 and an external sound.

12 and 13, the housing body 100c includes a protrusion 185c which is provided at an upper end and has an external sound inlet hole 187c and a protrusion 185c which communicates with the external sound inlet hole 187c, An external sound transmission path 120c for transmitting external sound to the external sound transmission path 120c and the external sound transmission path 120c and a sound source transmission path 180 for isolating the external sound transmission path 120c from each other and transmitting the sound source to the ear cap 300c, A lifting and lowering space 190c provided in the body 100c to provide a space for accommodating the external sound shield switching unit 200c and an engaging groove 150 to which the engaging projection 310 of the ear cap 300c is engaged, And a sound source unit 160 provided between the sound source transmission path 180 and the up / down space unit 190c.

The external sound transmission path 120c and the sound source transmission path 180 of the housing body 100c are isolated from each other and do not mix with each other before they are merged in the ear coupling flow path 320 as shown in Fig.

The lifting and lowering space portion 190c of the housing body 100c serves as a transmission passage for providing a space for accommodating the external sound shield switching portion 200c and transmitting the external sound to the sound source transmission passage 180. [

12, the external sound shield switching unit 200c includes an electromagnet 250 provided on the protrusion 185c of the housing body 100c and provided with an electromagnet hole 251 serving as an external sound inlet passage, An elastic body 220 disposed between the electromagnet 250 and the bottom of the protrusion 185c and an electromagnet 250 selectively shielding the external sound inlet hole 187c disposed at the bottom of the protrusion 185c And a shielding valve 260 having a shielding valve hole 261 at one side of the elastic body 220.

The operation of the external sound shield switching unit 200c will be described below.

12, when the power supplied to the electromagnet 250 is cut off, the shielding valve 260 is lowered by the expansion of the elastic body 220 to block the external sound inlet hole 187c.

In this state, when power is supplied to the electromagnet 250, the shielding valve 260 is raised to open the external sound inlet hole 187c. The external sound introduced through the electromagnet hole 251 and the shield valve hole 261 can be transmitted to the ear cap confluent passage 320 through the external sound inlet hole 187c and the external sound transmission passage 120c .

In this embodiment, the control of the power supplied to the electromagnet 250 can be performed in a mobile device including a smart phone.

12, the cap 300c can be engaged with the coupling groove 150 of the housing body 100c by the coupling protrusion 310 provided on the inner wall, and the external sound transmission passage 120c, And a sound-communicating passage 180 are joined to each other.

The earphone housing of the above-described earphone of this embodiment is provided in a pair and can be connected by a cable C to be used as an earphone or wirelessly without a cable C.

As described above, according to the present embodiment, the external sound transmission path is provided in the housing body, and the external sound shield switching part selectively shielding the external sound transmission path is provided in the housing body to selectively shield the external sound, And can be selectively applied to the earphone of the air conduction type and the bone conduction type, and the change of the basic structure of the earphone housing of the conventional earphone can be minimized.

As described above, the present invention has been described herein with reference to specific details such as specific components and the like, and various various embodiments and drawings. However, it should be understood that the present invention is not limited to the above-described embodiments, and various changes and modifications may be made without departing from the scope of the present invention. Modifications and modifications are possible.

Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

1, 1a, 1b, 1c: earphone housing
100, 100a, 100b, 100c: housing body
200, 200a, 200b, 200c: external sound shielding switching section
300, 300a, 300b, 300c: Ear cap

Claims (5)

An external sound transmission passage, and a housing body provided with a sound source section; An external sound shield switching part provided on the housing body to selectively shield the external sound transmission path; And an earphone housing coupled to the housing body to transmit at least one of a sound source and an external sound generated by the sound source unit,
The external sound shield switching unit may include:
A shielding switching body having a closed flange and a plurality of position fixing grooves;
An elastic body disposed between the closed flange and the housing body to apply an elastic force to the shielded switching body; And
And a position fixing member coupled to the housing body at one side thereof and selectively fixed to the plurality of position fixing grooves to fix the shielding switching body in position. The method according to claim 1,
The housing body includes:
A protrusion provided with the shielding switching body and provided with an external sound inlet hole;
The external sound transmission passage for transmitting an external sound introduced through the external sound inlet hole to the ear cap;
A sound source transmission passage for transmitting a sound source generated from the sound source section to the ear cap and isolated from the external sound transmission passage;
A lifting / lowering space provided as a lifting / lowering space of the shielded switching body and provided as a connection path between the external sound transmission passage and the sound source transmission passage; And
And the sound source unit is disposed inside the housing body between the sound source transmission passage and the up / down space unit. An external sound transmission passage, and a housing body provided with a sound source section; An external sound shield switching part provided on the housing body to selectively shield the external sound transmission path; And an earphone housing coupled to the housing body to transmit at least one of a sound source and an external sound generated by the sound source unit,
The external sound shield switching unit may include:
A shielding switching body rotatably provided on the housing body and having a shielding hole for introducing an external sound into the interior of the housing body; And
And an engaging member provided on the shielding switching body and engaged with the housing body. The method of claim 3,
The housing body includes:
A rotation guide groove portion provided on an upper side of the housing body to guide rotation of the shielding switching body;
An external sound transmission passage communicated with the shielding hole to transmit an external sound to the ear cap;
A sound source transmission passage for transmitting a sound source generated from the sound source section to the ear cap and isolated from the external sound transmission passage;
A coupling hole provided in the rotation guide groove and engaging the coupling member; And
And the sound source portion disposed inside the housing body between the sound source transmission passage and the engagement hole. An external sound transmission passage, and a housing body provided with a sound source section; An external sound shield switching part provided on the housing body to selectively shield the external sound transmission path; And an earphone housing coupled to the housing body to transmit at least one of a sound source and an external sound generated by the sound source unit,
The external sound shield switching unit may include:
An electromagnet provided on a protrusion of the housing body;
An elastic body disposed between the electromagnet and the bottom of the protrusion; And
And a shielding valve disposed at the bottom of the protrusion and selectively shielding the external sound inlet hole provided at the bottom of the protrusion by the electromagnet, wherein one side of the elastic body is in contact with the shielding valve.

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