KR20190022138A - Portable sound equipment - Google Patents

Abstract

The present invention relates to portable sound equipment capable of properly maintaining electrical connection between the structures even if a rotating part rotates in a rotating module. The portable sound equipment includes: a body including an earbud holder; an earbud detachably attached to the earbud holder to output sound; an acoustic cable extending from the body and connected to the earbud; a main board positioned inside the body; and a rotation module including a fixed part fixed to the body and a rotation part rotating relative to the fixed part and winding and unwinding the acoustic cable. The fixed part includes: a shaft; and an auxiliary board having a main connection electrode for electrically connecting the acoustic cable and the board. The rotation part includes: a bobbin rotating about the shaft and having a concave portion for winding the acoustic cable; a spiral spring having an inner end connected to the shaft and an outer end connected to the bobbin to provide rotational force to the bobbin; and a connection terminal for electrically connecting the acoustic cable and the main connection electrode. A first end of the connection terminal is fixed to the bobbin and a second end of the connection terminal is in contact with the first connection electrode.

Description

[0001] PORTABLE SOUND EQUIPMENT [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a portable acoustic apparatus for receiving a sound signal from a terminal via wireless communication with a terminal and transmitting a control signal for controlling the terminal.

A sound device refers to a sound device that receives a sound signal from a terminal and transmits the sound information collected through the microphone to the terminal. Conventionally, a wired method has been used in which a terminal is connected to an earphone jack of a terminal to receive an acoustic signal. However, in view of mobility and ease of use, the demand for a wireless communication type portable acoustic device is increasing.

The portable sound device includes an audio output unit and can perform music playback, telephone conversation, and the like. It is possible to make a telephone call by connecting to the base station itself or directly to an external server to obtain sound data and to perform the function through connection with another terminal.

Portable audio equipment having a design considering portability such as a headphone type in which a user puts his / her head into a band shape so as to be portable to the user's body, an ear-type type and an ear-type type are being developed.

Particularly, in the case of a portable acoustic apparatus of the type that is carried (or stowed) in the body of a user, it is desirable to minimize the number of components and reduce the weight.

In addition, considering the design factors, the components of the portable audio equipment need to be made as compact as possible.

The present invention relates to a portable acoustical instrument for receiving a sound signal from a terminal via a wireless communication with a terminal and transmitting a control signal for controlling the terminal, wherein the electrical connection between the components can be well maintained And to provide a portable sound device.

It is another object of the present invention to provide a portable acoustic apparatus which can minimize the number of components provided in a rotary module.

It is another object of the present invention to provide a portable acoustic apparatus capable of compactly manufacturing a rotary module, which is one of major components, and reducing the manufacturing cost.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an earbud holder, An ear bud detachably attached to the ear bud holder and outputting sound; An acoustic cable extending from the body and connected to the earbud; A main board positioned inside the main body; And a rotating module including a fixed part fixed to the main body and a rotating part rotating about the fixed part and winding and loosening the audio cable.

At this time, the fixing portion includes a shaft; And an auxiliary board having a main connection electrode for electrically connecting the audio cable and the main board.

Wherein the rotary part includes: a bobbin having a concave part that rotates about the shaft and into which the acoustic cable is wound; A spring having an inner end connected to the shaft and an outer end connected to the bobbin to provide rotational force to the bobbin; And a connection terminal for electrically connecting the acoustic cable and the main connection electrode.

The first end of the connection terminal is fixed to the bobbin, and the second end of the connection terminal is in contact with the first connection electrode.

The auxiliary substrate may be formed in a circular disc shape. The main connection electrode may be disposed around the auxiliary substrate.

The auxiliary substrate may be disposed below the bobbin. The first end of the connection terminal may be fixed to the lower surface of the bobbin at a radially outer side of the auxiliary substrate.

The main connection electrode may be recessed toward the radial center of the auxiliary substrate and may have a groove extending along the longitudinal direction of the main connection electrode. At this time, the second end of the connection terminal can contact the groove as a free end.

The connection terminal may be formed of an elastic brush made of a metal having elasticity.

The connection terminal may include at least one bent portion, and the bent portion may contact the main connection electrode.

The bent portion may include a first bent portion for directing the second end of the connection terminal toward the main connection electrode and a second bent portion for contacting the main connection electrode.

And an auxiliary connection electrode provided on one side of the auxiliary substrate and electrically connected to the main connection electrode. The main connection electrode and the main substrate may be electrically connected through the auxiliary connection electrode.

The auxiliary substrate may be provided on the lower side of the bobbin, and the auxiliary connection electrode may be provided on the lower surface of the auxiliary substrate. The auxiliary connection electrode may be connected to the main board through a connection cable.

And an upper bracket covering the upper end of the rotation module and a lower bracket covering the lower end of the rotation module and coupled to the upper bracket. The shaft and the auxiliary board may be fastened to the upper surface of the lower bracket.

The connection cable may extend to a lower side of the lower bracket through a guide groove formed in the lower bracket.

The main connection electrode includes a first main connection electrode arranged to surround a part of the auxiliary substrate and a second main connection electrode arranged to surround the other part of the auxiliary substrate at the opposite side of the first main connection electrode, .

The connection terminal may include a first connection terminal in contact with the first main connection electrode and a second connection terminal in contact with the second main connection electrode.

The first main connection electrode and the second main connection electrode may be spaced apart from each other. The auxiliary substrate may include an insulating portion disposed between the first main connecting electrode and the second main connecting electrode.

The first connection terminal may be in contact with the first main connection electrode and the second connection terminal may be in contact with the second main connection electrode in a state where the acoustic cable is completely loosened from the rotation module.

The auxiliary connection electrode may include a first auxiliary connection electrode electrically connected to the first main connection electrode and a second auxiliary connection electrode electrically connected to the second main connection electrode.

The spring is disposed on the upper side of the bobbin, and the shaft extends upward through a through hole formed in a central portion of the bobbin. The radially inner end of the spring may be fastened to an incision formed in the shaft.

When the acoustic cable is pulled out, the portable acoustic apparatus fixes the rotation of the rotation unit in a state where the rotation unit is rotated in the first direction, and when the acoustic cable is pulled back and placed, the rotation unit rotates in the second direction, And a rotation guide unit for controlling the rotation of the rotation unit.

The rotation guide portion includes a ball track including a pair of circular tracks; A ball slot extending in one direction; And a ball interposed between the ball track and the ball slot and moving between the ball track and the ball slot when the rotation unit rotates.

The rotation unit may include a rotation guide body coupled to the bobbin at an upper portion of the bobbin. The ball track may be formed on an upper surface of the rotation guide body, and the ball slot may be formed on a lower surface of the upper bracket.

The spiral spring may be disposed between the rotation guide body and the bobbin. A concave attachment portion for the spring spring may be formed on the lower surface of the rotation guide body and the upper surface of the bobbin.

According to the present invention, it is possible to provide a portable acoustic apparatus in which the electrical connection between the structures can be well maintained even if the rotating portion rotates in the rotating module.

Further, according to the present invention, it is possible to provide a portable acoustic apparatus that can minimize the number of parts provided in the rotary module.

In addition, according to the present invention, it is possible to provide a portable acoustic apparatus which can compactly manufacture a rotary module, which is one of the main components, and can reduce manufacturing costs.

1 is a block diagram showing a configuration of a portable acoustic apparatus according to the present invention.
2 is a perspective view of a portable audio device according to an embodiment of the present invention, viewed from one direction.
3 is an exploded perspective view of a portable acoustic apparatus according to an embodiment of the present invention.
4 is an exploded perspective view of an elastic band of a portable acoustic apparatus according to an embodiment of the present invention.
5 is a view showing a coupling method of the elastic band and the housing of the portable acoustic apparatus according to an embodiment of the present invention.
6 is an exploded perspective view illustrating a rotation module of a portable acoustic apparatus according to an embodiment of the present invention.
7 is a bottom view of the rotation module shown in Fig.
8 is a view showing a ball track of the portable acoustic apparatus of the present invention.
9 and 10 are views for explaining an aspect in which the ball of the portable acoustic apparatus of the present invention moves along the ball track.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

1 is a block diagram of a portable acoustic device 300 according to an embodiment of the present invention. 2 is a perspective view of the portable acoustic device 300 according to an embodiment of the present invention, viewed from one direction. Reference is now made to Fig. 2 for convenience of explanation of the arrangements of the portable acoustic apparatus 300 according to Fig.

 The portable acoustic device 300 of the present invention includes a control unit 380, a wireless communication unit 385, an acoustic output unit 340, a sensing unit 375, a microphone 360, a user input unit 370, and a power supply unit 390, .

The sound output unit 340 is a device for outputting sound in accordance with a sound signal. As a representative example, there is an ear bud 340 that transmits sound by being inserted into a user's ear. The ear bud 340 may include an unshown sound output module.

The microphone 360 processes the external acoustic signal into electrical voice data. The processed voice data is transmitted to an external terminal or an external server through the wireless communication unit 385. The microphone 360 may be implemented with various noise reduction algorithms for eliminating noise generated in receiving an external sound signal.

The sensing unit 375 recognizes the state of the portable acoustic device 300 itself and its surroundings. The sensing unit 375 includes an illuminance sensor for sensing the brightness of the surroundings, a touch sensor for sensing the touch input, A gyro sensor for detecting an ear bud 340, an ear bud switch for detecting whether or not an ear bud 340 is positioned in the ear bud holder 325, and the like.

The user input unit 370 is an input unit for the user to control the portable acoustic device 300 and includes a call button 372, a button 373 for controlling the volume, a power button 371, and an acoustic cable 340, And a storage button 375 for storing the data in the storage unit 320.

The number of the user input units 370 may include only a call button 372 and a pair of volume control buttons 373, and may further include a play / stop button and a music order change button. Since the size of the portable audio device 300 is limited and the user input unit 370 often inputs without looking directly at the user, if the number of buttons is large, it is difficult to distinguish the functions of the respective buttons. The number of times of pressing and the number of times the button is pressed, and a plurality of buttons.

Since the portable audio device 300 maintains the wear state of the user, the risk of loss of the portable audio device 300 is small. However, the normal user terminal may be lost, and the user input unit 370 may perform an alarm function. For example, when two user input units 370 are simultaneously pressed for a predetermined time, an alarm of a terminal connected through Bluetooth can be called to find a lost terminal.

In addition, the voice recording function of the external terminal connected via Bluetooth can be activated to store the voice collected through the microphone 360 of the portable acoustic device 300.

In the related art, only the functions related to the call or the functions related to the playback of the sound media can be controlled by the portable sound device. However, the portable sound device of the present invention has an expanded control range.

2 is a perspective view of the portable acoustic device 300 according to an embodiment of the present invention, viewed from one direction. The main body of the portable acoustic device 300 of the present invention is composed of the elastic band 310 and the housing 320 and forms a C-shaped curve as shown in FIG.

At both ends of the elastic band 310 mounted behind the user's neck, a housing 320 forming an electric field part is provided. Since the elastic band 310 and the housing 320 are separated from each other mainly by function, the elastic band 310 and the housing 320 may be integrally formed without separating the elastic band 310 and the housing 320, .

The elastic band 310 is elastic and deformed within a predetermined range when a force is applied, and is returned to its original shape when the force is removed. When the distance between the housings 320 at both ends is not sufficient to pass through the neck, the elasticity of the elastic band 310 can be used to open each housing 320 to mount or unmount the neck 320.

The shape and length of the elastic band 310 are determined so as to minimize a foreign body feeling when the elastic band 310 is placed on the user's neck. For example, the elastic band 310 may be formed in a curved cylindrical shape, or may be provided in a twisted tape shape having a thickness and a thickness. In the case of the elastic band 310 in the form of a twisted tape, the inner side of the elastic band 310 is on the back side of the neck and the outer side faces the back side. A portion of the elastic band 310 and the connection of the housing 320 may be twisted so that the outer surface of each housing 320 faces the front or top surface of the user and the inner surface of the housing 320 faces the back or collarbone portion of the user.

The housing 320 is coupled to both ends of the elastic band 310 and is located at both ends of the C-shaped curve of the portable acoustic device 300. Various components such as a main board 381, a wireless communication unit 385, and a battery 391 rotation module 350 are inserted into the inside and the outside.

The C-shaped portable acoustic apparatus 300 can be worn on the user's neck as shown in FIG. At this time, the sensing unit 375 provided in the portable acoustic device 300 can detect whether or not the user wears the apparatus. For example, the sensing unit 375 may be provided in the elastic band 310 and may be implemented in the form of a displacement sensor that detects a change in curvature of the elastic band 310. The displacement sensor may sense that the user opens the housing 320 at both ends when the portable acoustic device 300 is worn. In this case, since the curvature of the elastic band 310 changes gently, it is determined that the user intends to use the portable acoustic device 300, and the power of the portable acoustic device 300 is turned on or synchronized with the external terminal.

The curvature after the change of the curvature of the elastic band 310 in the displacement sensor can be considered in order to more accurately determine whether the user wears it or whether it is worn on the mobile phone. When the curvature of the elastic band 310 is largely changed to the first size and then the curvature is fixed to a curvature of a second size that is gentler than that of the portable acoustic device 300, It is possible to judge that it is worn on.

In addition to the displacement sensor, a sensor such as a temperature sensor, a light sensor, or a heart sensor is provided on a wear surface of the wearer when the wearer worn the wearer's body, so that the temperature is in a person's body temperature range or brightness is darkened. The power of the portable audio-visual device 300 may be turned on, or the wireless communication unit 385 may be activated to synchronize with the external terminal.

Or a switch that is pressed in a physical manner so that the protruding switch is pressed to generate an ON signal when the user wears the switch. When the switch ON state is maintained for a predetermined time or more, the portable sound device 300 is powered on or synchronized with the external terminal .

The sensing unit 375 and the plurality of switches may be provided to accurately determine whether the sensing unit 375 is worn by combining a plurality of values.

3 is an exploded perspective view of a portable acoustic device 300 according to an embodiment of the present invention.

The housing 320 coupled to both ends of the elastic band 310 includes an upper case 321 and a lower case 324 and a main board 381 is interposed between the upper case 321 and the lower case 324, A wireless communication unit 385, a battery 391, a microphone 360, and a rotation module 350 are mounted.

The housing 320 is manufactured by injection molding a polymer material, and for example, a plastic product having strength such as polystyrene can be used. It may partially include a release material such as metal, glass, or leather.

The housing 320 may be formed of a rigid polystyrene (PS) material to protect the internal components and simultaneously coat the surface of the housing 320 with polyurethane so as to be in close contact with the user's body. When the polyurethane coating is applied to the surface of the housing 320, the integrated appearance of the portable acoustic device 300 can be formed, and both the elastic band 310 and the housing 320 are brought into close contact with the skin of the user, There is an advantage that it does not shake and it is comfortable.

Since the portable audio device 300 worn on the body is easily exposed to moisture such as sweat, the durability can be increased by adding a waterproof function. It is possible to form a rib that covers a gap between the upper case 321 and the lower case 324 or to prevent water from penetrating through the waterproof member. The upper case 321 and the lower case 324 can be brought into close contact with each other even if a separate waterproof member is not provided.

The main board 381 mounted in the housing 320 of the present invention includes a battery 391, a user input unit 370, an audio output unit 340, a wireless communication unit 385, a microphone 360, And the like. The components mounted on the housing 320 may be provided symmetrically with respect to the housing 320 on both sides or asymmetrically. A component provided only at one side of the housing 320 can be used through a signal line mounted on the elastic band 310. For example, when the wireless communication unit 385 is provided in the housing 320 of one side, the wireless communication unit 385 can transmit the acoustic signal received by the earbud 340 to the earbuds 340 on both sides using the signal line.

The wireless communication unit 385 may include an antenna pattern 386 mounted on the main substrate 381 or formed on the surface of the housing 320 to transmit and receive signals to / from an external terminal. A control signal and an acoustic signal are received from an external terminal by synchronizing with an external terminal using a local wireless communication method such as an external terminal and Bluetooth or input through a user input unit 370 or a microphone 360 of the portable acoustic apparatus 300 And transmits the received control command and sound signal to the external terminal.

The housing 320 may include a power button 371 for turning the power on / off, a button 372 for playing or talking, a direction key 373 for adjusting the sound, etc. Or may be used for the purpose of controlling to reproduce the music thereafter). The button may be a dome key that is physically pressed, or may be a touch key that senses a change in capacitance.

The position of the touch key is not limited, and the surface of the housing 320 can be variously used. When the touch key is implemented on the surface of the housing 320, the position of the touch key on the surface of the housing 320 and the function of the touch key can be displayed using the LED.

The earbud 340 is inserted into a user's ear to transmit sound, and the earbud 340 is connected to the main board 381 through an audio cable. The sound output module (not shown) can perform a function of directly generating sound at the ear bud 340. The sound output module refers to a configuration including a diaphragm and the like.

The main board 381 controls the ear bud 340 to control the sound output according to the acoustic signal.

4 is an exploded perspective view of the elastic band 310 of the portable acoustic device 300 according to another embodiment of the present invention. The elastic band 310 includes a shape memory alloy 311, covering portions 312 and 313, And includes a connection portion 315.

The shape memory alloy 311 has a property of restoring to a specific shape even if it is deformed. When the user applies a force to spread the body, the shape memory alloy 311 returns to the original shape even if the elastic band 310 is deformed. Thereby preventing deformation or damage of the shape of the portable acoustic device 300.

The elastic band 310 further includes covering portions 312 and 313 surrounding the shape memory alloy 311 and the covering portions 312 and 313 may be formed of thermoplastic polyurethane which is variable in shape . The thermoplastic polyurethane can be produced by dissolving in heat, and when hardened, has oil resistance, abrasion resistance, and elasticity like rubber.

And a connection part 315 having a fastening structure for coupling with the housing 320 located at both ends of the elastic band 310. [ The connecting portion 315 of the present invention extends in the left and right direction in the covering portions 312 and 313 so as to overlap with the housing 320 and partially covers the covering portions 312 and 313. That is, the cover portion is formed in the shape memory alloy 311 and the connecting portion 315 by a double injection method.

The shape memory alloy 311 and the second covering portion 312 covering the signal line are provided for accurately positioning the position of the shape memory alloy 311 on the connecting portion 315 and for fixing the signal line for transmitting and receiving signals on both sides of the housing 320 ). And both ends of the second covering portion 312 are joined to the pair of connection portions 315. A first covering portion 313 covering the connection portion 315, the second covering portion 312 and the shape memory alloy 311 is formed by a double injection molding method so that an elastic band Lt; RTI ID = 0.0 > 310 < / RTI >

5 is a view illustrating a coupling method of the elastic band 310 and the housing 320 of the portable acoustic device 300 according to another embodiment of the present invention. The shape memory alloy 311 (see FIG. 4) is exposed at both ends of the second covering portion 312 and both end portions of the shape memory alloy 311 (see FIG. 4) are bent into a hook shape to increase the fixing force, Can be combined. The connection portion 315 has a plurality of holes, and is fastened to the housing 320.

At least one area of the connection part 315 may be enclosed by the housing 320. The upper case 321 and the lower cases 322 and 324 may cover one side and the other side of at least one region of the connecting portion 315, respectively. Since the upper case 321 is exposed to the outside, one member extending from the portion of the elastic band 310 that engages with the connecting portion 315 to both ends of the body is used, and the lower case 322, A first lower case 322 surrounding the connection part 315 and a second lower case 324 on which the components are mounted.

One of the upper case 321 or the lower cases 322 and 324 and the connecting portion 315 penetrate through the fastening holes formed in the connecting portion 315 and are screwed into the upper case 321 or the lower cases 322 and 324, And the exposed portion of the head portion of the screw 316 can be fixed in such a manner that the opposite case covers and covers.

The length of the connecting portion 315 can be determined as necessary. In order to secure space and reduce weight, a minimum number of screws 316 can be applied. However, in this case, if the fastening force between the elastic band 310 and the housing 320 is weak and the elastic band 310 is repeatedly applied with a force, it may be damaged. Therefore, 316 can be used to increase the fastening force.

FIG. 6 is an exploded perspective view illustrating a rotation module 350 of the portable acoustic apparatus according to an embodiment of the present invention, and FIG. 7 is a bottom view of the rotation module 350. 6 (a) is an exploded perspective view of the rotation module 350 viewed from below, FIG. 6 (b) is an exploded perspective view of the rotation module 350 as viewed from above, and FIG. And a bottom view of the rotation module 350. [

The rotary module 350 is rotatably mounted inside the housing 320 and surrounds the acoustic cable while rotating to house the acoustic cable into the housing 320 (see FIG. 3), and the earbud 340 ) Is fastened to the ear bud holder (see Fig. 2).

The rotation module 350 may include a fixing portion 350a fixed to the housing 320 and a rotation portion 350b rotating relative to the fixing portion 350a. The fixing portion 350a may include brackets 3501 and 3502 located on the outer surface of the rotation module 350. [ The brackets 3501 and 3502 include an upper bracket 3501 that covers the upper end of the rotation module 350 and a lower bracket 3502 that covers the lower end of the rotation module 350 and is coupled to the upper bracket 3501. [ can do.

The fixing portion 350a may include a shaft 351 which serves as a rotation center axis of the rotation module 350. [ The shaft 351 may be fixed to the lower bracket 3502. For example, the shaft 351 may be fastened to the center of the lower bracket 3502.

The rotating portion 350b includes a cylindrical bobbin 353 to which the acoustic cable is wound. The bobbin 353 may include a concave portion 3531 which is drawn in the center direction for a space in which the acoustic cable 345 is wound.

A spring spring 355 may be provided on one side of the bobbin 353 to provide a force for driving rotation of the rotation module 350. For example, the spring 355 may be disposed on the upper side of the bobbin 353. The spiral spring 355 is a spiral-shaped leaf spring. The spiral spring 355 is fixed to the shaft 351 at its center, and its outer side is coupled to the rotating portion 350b. That is, the radially inner end of the coil spring 355 is fixed to the shaft 351, and the radially outer end of the coil spring 355 can be coupled to the rotation portion 350b. Specifically, the radially outer end of the coil spring 355 may be coupled to the bobbin 353.

Specifically, the shaft 451 may extend upward through a through hole 3530 formed in a central portion of the bobbin 353. The radially inner end of the coil spring 355 can be fastened to the cutout 3511 formed in the shaft 451. [

When the user pulls the acoustic cable, the bobbin 353 rotates in the first direction and the number of windings of the spring 355 is reduced to have a restoring force by elasticity. When the acoustic cable is released, the spring 355 is restored by the restoring force The bobbin 353 is rotated in the second direction opposite to the first direction and the acoustic cable is wound on the bobbin 353 and housed in the housing.

The rotation module 350 may further include a rotation guide 356 that controls rotation of the rotation portion 350b in the second direction by elasticity of the spring-loaded spring 355. [ The rotation guide 356 does not prevent the rotation part 350b from rotating in the first direction due to the user pulling the acoustic cable 345. [ Thereafter, when the user releases the audio cable, the rotation guide 356 prevents the rotation of the rotation part 350b in the second direction so as not to be housed in the housing 320 in a state in which the sound cable 345 is drawn out, And when the audio cable 345 is pulled back and pulled, the fixing is released to rotate in the second direction by the elasticity of the spring-loaded spring 355, so that the audio cable 345 is received.

The rotation unit 350b may further include a rotation guide body 352 coupled to the bobbin 353 at an upper portion of the bobbin 353. The rotation guide body 352 may include a coupling portion 3520 to which the upper end of the shaft 351 is coupled. The engaging portion 3520 may be recessed in the center of the lower surface of the rotation guide body 352.

The spiral spring 355 may be disposed between the rotation guide body 352 and the bobbin 353. Concave mounting portions 3522 and 3532 for positioning the spring springs 355 may be formed on the lower surface of the rotation guide body 352 and the upper surface of the bobbin 353. The mounting portions 3522 and 3532 may include a first mounting portion 3522 formed on the lower surface of the rotation guide body 352 and a second mounting portion 3532 formed on the upper surface of the bobbin 353.

As described above, the bobbin 353 includes a space for accommodating the spiral spring 355 at an upper portion thereof, and a recess 3531 through which the acoustic cable 345 is wound is formed at a lower portion thereof. When the concave portion 3531 is positioned at the lower portion, the acoustic cable can be wound round the floor, so that the problem that the acoustic cable 345 is wound around the bobbin 353 can be solved.

Even if the rotation unit 350b rotates, the acoustic cable 345 should be maintained connected to the main board 381 mounted on the housing 320.

The fixing portion 350a may include an auxiliary substrate 382 having main connection electrodes 3827 and 3828 for electrically connecting the acoustic cable 345 and the main substrate 381. [ The acoustic cable 345 may be electrically connected to the main board 381 through the main connection electrodes 3827 and 3828. The auxiliary substrate 382 may be penetrated by the shaft 351. That is, the shaft 351 can penetrate the central portion of the auxiliary substrate 382. The auxiliary substrate 382 may be fixed to the upper surface of the lower bracket 3502.

The rotation unit 350b may include connection terminals 3537 and 3538 for electrically connecting the acoustic cable 345 and the main connection electrodes 3827 and 3828. [ The first ends of the connection terminals 3537 and 3538 may be fixed to the bobbin 353 and the second ends may be in contact with the main connection electrodes 3827 and 3828.

Therefore, even if the bobbin 353 rotates, the electrical connection between the acoustic cable 345 and the main board 381 can be stably maintained.

Specifically, the auxiliary substrate 382 may be formed in the form of a circular disk. The main connection electrodes 3827 and 3828 may be disposed around the auxiliary substrate 382. That is, the main connection electrodes 3827 and 3828 may be curved along the side surface of the auxiliary substrate 382 formed in the form of a circular disk.

The second ends of the connection terminals 3537 and 3538 are held in contact with the main connection electrodes 3827 and 3828 even if the connection terminals 3537 and 3538 rotate according to the rotation of the rotation unit 350b .

The auxiliary substrate 382 may be disposed below the bobbin 353. That is, the auxiliary substrate 382 can be fastened to the upper surface of the lower bracket 3502 from below the encapsulation 353.

The first ends of the connection terminals 3537 and 3538 may be fixed to the lower surface of the bobbin 353. Specifically, the first ends of the connection terminals 3537 and 3538 may be fixed to the lower surface of the bobbin 353 at a radially outer side of the auxiliary substrate 382. Therefore, even if the connection terminals 3537 and 3538 rotate together with the bobbin 353, the second ends of the connection terminals 3537 and 3538, which face the periphery of the auxiliary substrate 382, , 3828).

The fixed connection electrodes 3533 and 3534 contacting the first ends of the connection terminals 3537 and 3538 may be fastened to the lower surface of the bobbin 353. The fixed connection electrodes 3533 and 3534 may be fastened to the lower surface of the bobbin 353 at a radially outer side of the auxiliary substrate 381. An acoustic cable 345 may be connected to the fixed connection electrodes 3533 and 3534. Therefore, the acoustic cable 345 may be electrically connected to the connection terminals 3537 and 3538 through the fixed connection electrodes 3533 and 3534. [ The electrical connection between the acoustic cable 345 and the connection terminals 3537 and 3538 can be stably maintained by the fixed connection electrodes 3533 and 3534.

Of course, since the first ends of the connection terminals 3537 and 3538 are fixed to the lower surface of the bobbin 353, the acoustic cable 345 can be connected to the fast terminals 3537 and 3538 without the fixed connection electrodes 3533 and 3534 Or may be connected directly to the first end of the second housing.

The main connection electrodes 3827 and 3828 may have grooves 3827 'and 3828' formed concavely toward the center of the auxiliary substrate 382. The recesses 3827 'and 3828' may be concave toward the radial center of the auxiliary substrate 382. The grooves 3827 'and 3828' may extend along the longitudinal direction of the main connection electrodes 3827 and 3828. For example, the recesses 3827 ', 3828' may extend over the entire length of the main connection electrodes 3827, 3828.

At this time, the second ends of the connection terminals 3537 and 3538 are free ends and can contact the grooves 3827 'and 3828'. That is, the second ends of the connection terminals 3537 and 3538 can be in contact with the main connection electrodes 3827 and 3828 while being inserted into the recesses 3827 'and 3828'. Therefore, even if the connection terminals 3537 and 3538 rotate together with the bobbin 353, the contact between the second ends of the connection terminals 3537 and 3538 and the main connection electrodes 3827 and 3828 is stably maintained .

The connection terminals 3537 and 3538 may be formed of a metal material having elasticity. For example, the connection terminals 3537 and 3538 may be formed in the form of an elastic brush or in the form of a pocopin. The short circuit between the connection terminals 3537 and 3538 and the main connection electrodes 3827 and 3828 can be prevented by the elasticity of the connection terminals 3537 and 3538 when the bobbin 353 is rotated.

 The connection terminals 3537 and 3538 may include at least one bent portion 3537 ', 3537', 3538 ', and 3538'. The bent portions 3537 ', 3537 ", 3538', and 3538" may be in contact with the main connection electrodes 3827, 3828. That is, the bent portions 3537 ', 3537 ", 3538', and 3538" may be disposed in the recesses 3827 ', 3828'. This is to stably maintain the contact between the connection terminals 3537 and 3538 and the main connection electrodes 3827 and 3828.

Specifically, the bent portions 3537 ', 3537 ", 3538', and 3538" are provided with first bent portions 3537 ', 3537', 3538 ', and 3538' for orienting the second ends of the connection terminals 3537, 3538 toward the main connection electrode, And second bending portions 3537 "and 3538" that are in contact with the main connection electrodes 3827 and 3828. The first bent portions 3537 'and 3538' may be disposed closer to the first ends of the connection terminals 3537 and 3538 than the second bent portions 3537 'and 3538'. The second bent portions 3537 "and 3538" may be disposed at the second ends of the connection terminals 3537 and 3538. Therefore, the second bent portions 3537 "and 3538" can be in contact with the main connection electrodes 3827 and 3828. That is, the second bent portions 3537 ", 3538" may be disposed in the recesses 3827 ', 3828'.

Meanwhile, the main connection electrodes 3827 and 3828 are electrically connected to the main substrate 381. Auxiliary connection electrodes 3535 and 3536 electrically connected to the main connection electrodes 3827 and 3828 may be provided on one side of the auxiliary substrate 382. [

The electrical connection between the main connection electrodes 3827 and 3828 and the auxiliary connection electrodes 3535 and 3536 may be established by connecting the connection terminals 3835 and 3536 between the main connection electrodes 3827 and 3828 and the auxiliary connection electrodes 3535 and 3536, (3537, 3538). That is, the first ends of the connection terminals 3537 and 3538 are fixed in contact with the auxiliary connection electrodes 3535 and 3536, and the second ends of the connection terminals 3537 and 3538 are fixed to the main connection electrodes 3827 , 3828, respectively.

In order to prevent interference with the bobbin 353, the auxiliary connection electrodes 3535 and 3536 may be provided on the lower surface of the auxiliary substrate 382. The main connection electrodes 3827 and 3828 may be electrically connected to the main substrate 381 through the auxiliary connection electrodes 3535 and 3536.

Specifically, the auxiliary connection electrodes 3535 and 3536 may be electrically connected to the main substrate 381 through a connection cable 383. At this time, the connection cable 383 may extend along the guide groove 3503 provided on the lower surface of the lower bracket 3502. That is, the connection cable 383 may extend to the lower side of the lower bracket 3602 through the guide groove 3503 and may be connected to the main board 381. This is to prevent interference between the rotation part 350b and the connection cable 383.

Therefore, an electric signal from the main board 381 is transmitted to the main board 381 through the connection cable 383, the auxiliary connection electrodes 3535 and 3536, the main connection electrodes 3827 and 3828, the connection terminals 3537 and 3538, And may be transmitted to the sound output unit 340 through the fixed connection electrodes 3533 and 3534 and the sound cable 345 sequentially.

On the other hand, the acoustic cable 345 may include at least two signal lines. The main connection electrodes 3827 and 3828, the auxiliary connection electrodes 3535 and 3536, the connection terminals 3537 and 3538 and the fixed connection electrodes 3533 and 3534 may be provided corresponding to the respective signal lines .

Specifically, the main connection electrodes 3827 and 3828 may include a first main connection electrode 3827 disposed to surround a part of the auxiliary substrate 382, and a second main connection electrode 3832 disposed on the opposite side of the second main connection electrode, And a second main connection electrode 3828 arranged to surround some other peripheries. The connection terminals 3537 and 3538 include a first connection terminal 3537 in contact with the first main connection electrode 3827 and a second connection terminal 3538 in contact with the second main connection electrode 3828 can do.

The first main connection electrode 3827 and the second main connection electrode 3828 are spaced apart from each other and the first main connection electrode 3827 and the second main connection electrode 3828 are spaced apart from each other, It is preferable that the insulating portions 3821 and 3822 are disposed between the insulating portions 3828 and 3828.

The insulating portions 3821 and 3822 may be provided on the auxiliary substrate 382. That is, the insulating portions 3821 and 3822 are provided around the auxiliary substrate 382 so as to isolate both ends of the first main connecting electrode 3827 and both ends of the second main connecting electrode 3828 .

The first connection terminal 3537 may be in contact with the first main connection electrode 3827 and the second connection terminal may be in contact with the second main connection electrode while the acoustic cable 345 is completely unwound. That is, in a state where the acoustic cable 345 is completely unwound, the first connection terminal 3537 is in contact with the first main connection electrode 3827, the second connection terminal is in contact with the second main connection electrode, The first main connection electrode 3827 and the second main connection electrode may be disposed around the auxiliary substrate 382.

The auxiliary connection electrodes 3535 and 3536 may include a first auxiliary connection electrode 3535 electrically connected to the first main connection electrode 3827 and a second auxiliary connection electrode 3535 electrically connected to the second main connection electrode 3828. [ And may include a connection electrode 3536. The first auxiliary connection electrode 3535 and the second auxiliary connection electrode 3536 may be spaced apart from each other on the lower surface of the auxiliary substrate 382. The connection cable 383 is provided with two signal lines and each signal line may be connected to the first auxiliary connection electrode 3535 and the second auxiliary connection electrode 3536 through soldering or the like. The first auxiliary connection electrode 3535 can electrically connect one of the two signal lines included in the connection cable 383 to the first main connection electrode 3827. The second auxiliary connection electrode 3536 may electrically connect the other of the two signal lines included in the connection cable 383 to the second main connection electrode 3828.

The connection terminals 3537 and 3538 may include a first connection terminal 3537 in contact with the first main connection electrode 3827 and a second connection terminal in contact with the second main connection electrode 3828. The first end of the first connection terminal 3537 is connected to the fixed connection electrodes 3533 and 3534 and the second end of the first connection terminal 3537 is connected to the first main connection electrode 3827 . The first end of the second connection terminal 3538 is connected to the fixed connection electrodes 3533 and 3534 and the second end of the second connection terminal 3538 is connected to the second main connection electrode 3828, .

The fixed connection electrodes 3533 and 3534 are connected to a first fixed connection electrode 3533 to which a first end of the first connection terminal 3537 is connected and a second fixed connection electrode 3533 to which a first end of the second connection terminal 3538 is connected And two fixed connection electrodes 3534. That is, the first fixed connection electrode 3533 can electrically connect one of the two signal lines included in the acoustic cable 345 to the first end of the first connection terminal 3537. The second fixed connection electrode 3534 may electrically connect the other of the two signal lines provided in the acoustic cable 345 to the first end of the second connection terminal 3538.

The rotation guide 356 includes a ball track 359 and a ball slot 359 located on one side of the fixed portion 350a and the rotation portion 350b and on the other side of the ball track 357, And a ball 358 disposed between the ball slot 359 and the ball slot 359. The ball track 357 and the ball slot 359 include concave depressions having a curved surface corresponding to the shape of the ball 358 so that the ball 358 can move along the ball track 357 and the ball slot 359 do.

The ball slot 359 extends in the direction of the center of rotation to control the ball 358 to move only along the ball slot 359, and the ball track 357 includes a circular track. When the ball track 357 is rotated by the rotation of the rotation guide body, the ball 358 moves along the ball slot 359 in accordance with the position on the ball track 357. The ball 358 moves relative to the component of the direction in which the ball slot 359 is formed, depending on the path of the fixed ball slot 359, with relative displacement along the locus of the rotating ball track 357.

Hereinafter, the driving principle of the rotation guide section 356 will be described more specifically with reference to other drawings.

9 and 10 illustrate an embodiment in which the ball 358 of the portable acoustical instrument of the present invention is moved along the ball track 357 Fig. The ball track 357 is located at the rotation part 350b and the ball slot 359 is positioned at the fixing part 350a for convenience of explanation. As the ball track 357 rotates, the ball 358 moves along the ball track 357 in the direction opposite to the rotating direction of the rotating portion 350b.

The ball track 357 includes a circular first track 3571 and a second track 3572 and a connecting track 3573 and a fixed track 3574 formed between the first track 3571 and the second track 3572 . The first track 3571 and the second track 3572 have different diameters and the first track 3571 and the second track 3572 have the track depth changed (inclined). The engaging portions 3571a and 3572a form a step to compensate for the depth difference between the first track 3571 and the second track 3572. [

9 is a diagram showing the positional relationship between the ball 358 and the ball track 357 and the ball slot 359 in a state in which the acoustic cable 345 is wound on the bobbin 353. [ The first track 3571 can continue to rotate along the first track 3571 when the ball 358 rotates in the first direction (the ball track 357 rotates in the second direction) when the ball 358 rotates in the second direction (the ball track 357 rotates in the first direction), the ball 358 is caught by the engaging portion 3571a to move along the connecting track 3573 to the second track (Fig. 8 (c), (d), and (e)).

10 is a view showing the positional relationship between the ball 358 and the ball track 357 and the ball slot 359 in a situation where the acoustic cable is fixed and released. The second track 3572 is inclined in a direction opposite to the first track 3571 and rotates along the second track 3572 when the ball 358 rotates in the second direction. 10 (a) and 10 (b), when the pulling force of the acoustic cable 345 is removed, the elasticity of the spring spring causes the ball track 357 to rotate in the second direction in the first direction And the ball 358 moves to the engaging fixed track 3574 in the engaging portion 3572a of the second track 3572. [

The fixed track 3574 is formed by a first portion 3574a extending in the first direction and a second portion 3574b extending in the second direction and has an elongated shape and has a first portion 3574a and a second portion 3574b, And stops at the corner portion 3574c to which the ball 3574b is connected to prevent the ball 358 from rotating in the first direction.

When the user again pulls the acoustic cable, the ball 358 moves in the second direction and moves to the first track 3571 along the second portion 3574b. ((C) and (d) of FIG. 10)

When the user shortly pulls the audio cable and then releases it again, the audio cable is wound on the bobbin 353 (Figs. 9A and 9B) as the ball 358 continues to rotate in the first direction on the first track 3571, When the user pulls the audio cable 345 longer, the first track 3571 moves along the connecting track 3573 to the second track 3572 so that the ball 358 moves in the second direction and the acoustic cable continues to be pulled out ((C), (d), and (e) of FIG. 9).

That is, when the audio cable is drawn out, the rotation part 350b rotates in the first direction so that the ball 358 moves in the second direction along the second track 3572, and when the audio cable is received, the rotation part 350b The ball 358 moves in the first direction along the first track 3571 because the ball 358 rotates in the second direction. The ball 358 is located inside the ball slot 359 when in the first track 3571 and outside the ball slot 359 when in the second track 3572 and the fixed track 3574 or connection And is located in the center of the ball slot 359 when it is located on the track 3573.

According to the present invention, it is possible to provide a portable acoustic apparatus in which the electrical connection between the structures can be well maintained even if the rotating portion rotates in the rotating module.

Further, according to the present invention, it is possible to provide a portable acoustic apparatus that can minimize the number of parts provided in the rotary module.

In addition, according to the present invention, it is possible to provide a portable acoustic apparatus which can compactly manufacture a rotary module, which is one of the main components, and can reduce manufacturing costs.

The foregoing detailed description should not be construed in any way as limiting and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

300: portable sound device 310: elastic band
311: shape memory alloy wire 312: second covering portion
313: first covering portion 315: connection portion
317: fastening hole 318: signal line hole
319: Signal line receiving part 320: Housing
321: upper case 322: first lower case
324: second lower case 325: ear bud holder
340: Earbud 345: Acoustic cable
350: rotation module 360: microphone
370: user input unit 375: sensing unit
380: control unit 381: main substrate
382: auxiliary substrate 385: radio communication section
390: power supply unit 391: battery
350a: Fixing portion 350b:
351: shaft 353: bobbin
355: spring-loaded spring 357: ball track
3571: first track 3572: second track
3573: Connection Track 3574: Fixed Track
358: Ball 359: Ball Slot

Claims (20)

A body including an ear bud holder;
An ear bud detachably attached to the ear bud holder and outputting sound;
An acoustic cable extending from the body and connected to the earbud;
A main board positioned inside the main body; And
And a rotation module including a fixed part fixed to the main body and a rotation part rotating about the fixed part and winding and loosening the sound cable,
Wherein the fixed portion comprises: a shaft; And an auxiliary board having a main connection electrode for electrically connecting the audio cable and the main board,
Wherein the rotary part includes: a bobbin having a concave part that rotates about the shaft and into which the acoustic cable is wound; A spring having an inner end connected to the shaft and an outer end connected to the bobbin to provide rotational force to the bobbin; And a connection terminal electrically connecting the acoustic cable and the main connection electrode,
Wherein a first end of the connection terminal is fixed to the bobbin, and a second end of the connection terminal is in contact with the first connection electrode. The method according to claim 1,
Wherein the auxiliary substrate is formed in a circular disc shape,
And the main connection electrode is disposed around the auxiliary board. 3. The method of claim 2,
Wherein the auxiliary substrate is disposed below the bobbin,
And a first end of the connection terminal is fixed to a lower surface of the bobbin at a radially outer side of the auxiliary board. The method of claim 3,
Wherein the main connection electrode is recessed toward the radial center of the auxiliary substrate and has a groove extending along the longitudinal direction of the main connection electrode,
And the second end of the connection terminal is in contact with the groove as a free end. 5. The method of claim 4,
Wherein the connection terminal is an elastic brush made of a metal material having elasticity. 6. The method of claim 5,
Wherein the connection terminal has at least one bent portion, and the bent portion is in contact with the main connection electrode. The method according to claim 6,
Wherein the bent portion includes a first bent portion for allowing the second end of the connection terminal to face the main connection electrode, and a second bending portion contacting the main connection electrode. The method of claim 3,
And an auxiliary connection electrode provided on one side of the auxiliary substrate and electrically connected to the main connection electrode,
And the main connection electrode and the main board are electrically connected through the auxiliary connection electrode. 9. The method of claim 8,
The auxiliary substrate is provided on the lower side of the bobbin, the auxiliary connection electrode is provided on the lower surface of the auxiliary substrate,
And the auxiliary connection electrode is connected to the main board through a connection cable. 10. The method of claim 9,
Further comprising an upper bracket covering the upper end of the rotation module and a lower bracket covering the lower end of the rotation module and coupled to the upper bracket,
And the shaft and the auxiliary board are fastened to the upper surface of the lower bracket. 11. The method of claim 10,
Wherein the connection cable extends to a lower side of the lower bracket through a guide groove formed in the lower bracket. 9. The method of claim 8,
The main connection electrode includes a first main connection electrode arranged to surround a part of the auxiliary substrate and a second main connection electrode arranged to surround the other part of the auxiliary substrate at the opposite side of the first main connection electrode, Including,
Wherein the connection terminal includes a first connection terminal in contact with the first main connection electrode and a second connection terminal in contact with the second main connection electrode. 13. The method of claim 12,
Wherein the first main connection electrode and the second main connection electrode are spaced apart from each other,
Wherein the auxiliary board includes an insulating portion disposed between the first main connecting electrode and the second main connecting electrode. 13. The method of claim 12,
Wherein the first connection terminal is in contact with the first main connection electrode and the second connection terminal is in contact with the second main connection electrode while the acoustic cable is completely loosened from the rotation module. 13. The method of claim 12,
Wherein the auxiliary connection electrode includes a first auxiliary connection electrode electrically connected to the first main connection electrode and a second auxiliary connection electrode electrically connected to the second main connection electrode. The method according to claim 1,
The spring is disposed on the upper side of the bobbin,
Wherein the shaft extends upward through a through hole formed in a central portion of the bobbin,
Wherein the radially inner end of the spring is fastened to the incision formed in the shaft. 11. The method of claim 10,
The rotation of the rotary part is fixed in a state where the rotary part is rotated in the first direction when the acoustic cable is pulled, and the rotary part is rotated in the second direction and wound on the bobbin when the acoustic cable is pulled back And a rotation guide unit for controlling the rotation of the rotary unit. 18. The method of claim 17,
The rotation-
A ball track comprising a pair of circular tracks;
A ball slot extending in one direction;
And a ball interposed between the ball track and the ball slot to move between the ball track and the ball slot upon rotation of the rotation unit. 19. The method of claim 18,
Wherein the rotation unit includes a rotation guide body coupled to the bobbin at an upper portion of the bobbin,
Wherein the ball track is formed on an upper surface of the rotation guide body, and the ball slot is formed on a lower surface of the upper bracket. 20. The method of claim 19,
Wherein the spiral spring is disposed between the rotation guide body and the bobbin,
Wherein a concave attachment portion for the spring spring is formed on the lower surface of the rotation guide body and the upper surface of the bobbin.

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