WO2020138565A1

WO2020138565A1 - Portable acoustic device

Info

Publication number: WO2020138565A1
Application number: PCT/KR2018/016880
Authority: WO
Inventors: 이민복; 박병덕; 조정현; 천세훈
Original assignee: 엘지전자 주식회사
Priority date: 2018-12-28
Filing date: 2018-12-28
Publication date: 2020-07-02

Abstract

Provided is a portable acoustic device comprising: a main body; a retractable module mounted inside the main body; a printed circuit board mounted inside the main body; a sound cable of which one end is connected to the printed circuit board and which is retracted into and withdrawn from the retractable module; and an ear bird connected to the other end of the sound cable, wherein the retractable module includes: a fixed roller; a movable bracket for moving between a first position adjacent to the fixed roller and a second position spaced in a first direction; a movable roller for moving along the movable bracket; a driving part which rotates by the elasticity of a spring, and restores the movable bracket to the second position; and a wire of which one end is coupled to the movable bracket and the other end is fixed to the driving part, and which is wound in proximity to the driving part, and the sound cable is wound while reciprocating between the fixed roller and the movable roller.

Description

Portable audio equipment

The present invention relates to a portable sound device for receiving a sound signal from a terminal through wireless communication with the terminal and transmitting a control signal for controlling the terminal.

A portable sound device means an audio device that receives sound signals from a terminal and transmits sound information collected through a microphone to the terminal. In the related art, a portable audio device has been used in a wired manner to receive an audio signal by inserting a terminal into the ear jack of a terminal, but in recent years, the demand for portable audio equipment of a wireless communication method has increased in terms of mobility and convenience of use.

The portable sound device has an audio output unit and can perform functions such as music playback and telephone conversation. It can connect itself to the base station to make a phone call, or directly connect to an external server to obtain sound data, and connect to another terminal to perform the above function through pairing.

In order to carry it on the user's body, a portable sound device having a design in consideration of portability has been developed, such as a headphone type fitted on the head in a band shape, a type hanging on the ear and a type fitted on the ear.

The acoustic cable that connects between the earbud that inserts into the user's ear and outputs the sound and the body that is mounted is in the form of a long string. It may be provided with a storage module for.

An object of the present invention is to provide a portable sound device having a slim structured storage module in a portable sound device that receives a sound signal from the terminal through wireless communication with the terminal and transmits a control signal to control the terminal.

main body; A retractable module mounted inside the main body; A printed circuit board mounted inside the main body; One end is connected to the printed circuit board and the acoustic cable is received and drawn into the storage module; And an earbud connected to the other end of the acoustic cable, the storage module comprising: a fixed roller rotating the first shaft as an axis; A moving bracket moving between a first position adjacent to the fixed roller and a second position spaced apart in a first direction; A moving roller which rotates a second shaft fixed to the moving bracket on an axis; A driving unit that rotates by the elasticity of the mainspring spring and restores the movable bracket to the second position; And one end is coupled to the mobile bracket, the other end is fixed to the driving unit and includes a wire wound around the driving unit, the acoustic cable is a portable acoustic device, characterized in that reciprocating and winding between the fixed roller and the moving roller Provides

The fixed roller and the moving roller may be formed along an outer circumference and may include a seating groove corresponding to the width of the acoustic cable.

The driving unit further includes a ball stopper for fixing the acoustic cable when the force for drawing out the acoustic cable is removed, and the ball stopper releases the fixing of the acoustic cable when a force for pulling the acoustic cable is applied for a short time. The acoustic cable may be received by the storage module.

The storage module further includes a module case containing the fixed roller, the movable bracket, and the movable roller and including an opening through which the sound cable passes at one end and the other end, and the driving unit is located outside the module case. Can.

It is located between the fixed roller and the moving roller and may further include a buffer stopper for fixing the sound cable when the moving bracket moves to the first position.

The buffer stopper includes a first rubber positioned on one side of an acoustic cable wound between the moving roller and the fixed roller; And a second rubber facing the first rubber located on the other side of the acoustic cable, and when the moving bracket reaches the first position, the gap between the first rubber and the second rubber decreases. The acoustic cable may be compressed by pressing the first rubber.

The first rubber may form an acute angle with a first surface contacting the wire and a second surface contacting the movable bracket.

The first rubber adjacent to the fixed roller may further include a fixing bracket hinged.

The effects of the portable sound device according to the present invention will be described as follows.

It is possible to form a storage module having a thickness that is thinner than that of the conventional storage module, so that the volume of the portable sound device can be reduced, and the configuration in which the sound cable is wound around the driving unit can be omitted, thereby reducing the defect of the sound cable being damaged.

In addition, it is possible to increase the reliability of the storage module and reduce the size to implement a portable sound device having a slim structure.

Further scope of applicability of the present invention will become apparent from the following detailed description. However, various changes and modifications within the spirit and scope of the present invention may be clearly understood by those skilled in the art, and thus, it should be understood that specific embodiments such as detailed description and preferred embodiments of the present invention are given by way of illustration only.

1 is a block diagram showing the configuration of a portable sound device of the present invention.

2 is a perspective view of a portable sound device according to an embodiment of the present invention as viewed from one direction.

3 is a view showing the interior of the housing of a portable sound device according to an embodiment of the present invention.

4 is a view showing the operation of the storage module of the portable sound device according to an embodiment of the present invention.

5 is a view showing a driving unit according to an embodiment of the present invention.

6 and 7 are views showing a stopper portion of a storage module of a portable sound device according to an embodiment of the present invention.

Hereinafter, exemplary embodiments disclosed herein will be described in detail with reference to the accompanying drawings, but the same or similar elements are assigned the same reference numbers regardless of the reference numerals, and overlapping descriptions thereof will be omitted. The suffixes "modules" and "parts" for the components used in the following description are given or mixed only considering the ease of writing the specification, and do not have meanings or roles distinguished from each other in themselves. In addition, in describing the embodiments disclosed in this specification, detailed descriptions of related well-known technologies are omitted when it is determined that they may obscure the gist of the embodiments disclosed herein. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed in the specification is not limited by the accompanying drawings, and all modifications included in the spirit and technical scope of the present invention , It should be understood to include equivalents or substitutes.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from other components.

When an element is said to be "connected" or "connected" to another component, it is understood that other components may be directly connected or connected to the other component, but other components may exist in the middle. It should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, the terms "comprises" or "have" are intended to indicate the presence of features, numbers, steps, operations, components, parts or combinations thereof described in the specification, one or more other features. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

1 is a block diagram of a portable sound device 300 according to an embodiment of the present invention. 2 is a perspective view seen from one direction of the portable sound device 300 according to an embodiment of the present invention. Reference is made to FIG. 2 for convenience of description of the components of the portable sound device 300 related to FIG. 1.

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

The sound output unit 340 is a device that outputs sound in accordance with an acoustic signal, and a typical example is an earbud 341 that transmits sound by inserting it into a user's ear.

The microphone 360 processes external sound signals as electrical voice data. The processed voice data is transmitted to an external terminal or an external server through the wireless communication unit 385. Various noise cancellation algorithms for removing noise generated in the process of receiving an external sound signal may be implemented in the microphone 360.

The sensing unit 375 is a device for recognizing the state of the portable sound device 300 itself and surroundings, and determines the illumination intensity of the surroundings, a touch sensor for detecting a touch input, and a tilt and position of the portable sound device. It may include a gyro sensor for detecting, an earbud switch for detecting whether the earbud 341 is located in the earbud holder 325 or the like.

The user input unit 370 is an input unit for the user to control the portable sound device 300, housing a call button 372, a button 373 for volume control, etc., a power button 371, and an acoustic cable 345 For example, a storage button 218 for receiving the inside may be exemplified.

The number of 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 change order of songs. The size of the portable sound device 300 is limited, and the user input unit 370 often enters the user without looking at it. If the number of buttons is large, it is difficult to distinguish the function of each button. The time and number of times of pressing and a combination of a plurality of buttons can be enlarged to a possible input command.

Since the portable sound device 300 maintains a worn state on the user's body, there is little risk of loss, but the user terminal 370 may perform an alarm function because a normal terminal may be lost. As an example, when two user input units 370 are simultaneously pressed for a certain period of time, an alarm of a terminal connected via Bluetooth can be sounded to find the lost terminal.

In addition, the voice recording function of the external terminal connected by Bluetooth is activated to store the voice collected through the microphone 360 of the portable sound device 300.

Conventionally, only a function related to a call or a function related to reproduction of sound media can be controlled by a portable sound device, but the portable sound device of the present invention is characterized in that its control range is expanded.

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

Both ends of the band 310 mounted behind the user's neck are provided with a housing 320 forming an electric field. Since the band 310 and the housing 320 are configured to mainly divide functions, the band 310 and the housing 320 may be integrally formed, or overlapping areas may be formed depending on the case.

The cross-sectional shape and length of the band 310 is determined in a form for minimizing foreign feeling when mounted on the user's neck. For example, the band 310 may be provided in a curved cylindrical shape, or may be provided in a twisted tape shape having a surface and a thickness. In the case of the twisted tape-shaped band 310, the inner surface of the band 310 becomes the back surface of the neck and the outer surface faces the back surface.

The band 310 has a wide surface facing the user's neck, and the housing 320 has a wide surface facing the upper surface to form a three-dimensional curve.

The housing 320 is coupled to both ends of the band 310 and is located at both ends of the C-shaped curve of the portable sound device 300. Various components such as the main substrate 381, the wireless communication unit 385, and the battery 391 storage module 200 are inserted inside and outside.

In the conventional portable sound device, in order to realize the storage structure of the sound cable 345, the band is thin, but the housings on both sides have to be formed relatively large. In order to solve this problem, the present invention can form the size of the housing 320 of the portable sound device 300 of the present invention thinner than in the prior art as shown in FIG. 2 by using a thin storage structure. The storage module of the present invention will be described in more detail later.

Whether it has a thickness similar to that of the band part, the housing is visually lighter because the part exposed to the front is thin, and a slim design that is recently preferred can be realized. In addition, when the portable sound device 300 is worn on the neck, the inconvenience caused by the housing 320 hitting the clavicle or the weight of the housing 320 may be eliminated.

The C-shaped portable sound device 300 may be worn on the user's neck and carried. In this case, the sensing unit 375 provided in the portable sound device 300 may detect whether the user wears the sensor. For example, the sensing unit 375 is provided in the band 310 and may be implemented in the form of a displacement sensor that detects a change in curvature of the band 310. The displacement sensor may detect that the user opens the housing 320 at both ends when the portable sound device 300 is worn. In this case, since the curvature of the band 310 changes gently, it is determined that the user intends to use the portable sound device 300, and the power of the portable sound device 300 is turned on or synchronized with an external terminal.

In addition to the displacement sensor, a sensor such as a temperature sensor, a light sensor, or a heart rate sensor is provided on a wear surface that comes into contact with the neck when the user wears it. And the portable audio device 300 is turned on or the wireless communication unit 385 is activated to synchronize with an external terminal.

The housing 320 may include an earbud holder 325 for seating the earbud 341. The earbud holder 325 is a groove corresponding to the shape of the earbud 341, and may have a magnet or hook structure to engage the earbud 341. The earbud holder 325 may be located at the end of the housing 320, and the earbud holder 325 is a housing so that the earbud 341 is not visible when the earbud 341 is coupled to the earbud holder 325. It is opened in the direction of the lower surface (the direction in contact with the user's body when worn by the user), and the front direction may be implemented in a form covered by the housing 320a.

The earbuds 341 are connected to the printed

circuit boards

381a and 381b located in the housing 320 through the acoustic cable 345, and the printed

circuit boards

381a and 381b are controlled through the acoustic cable 345 The sound output from the earbud 341 is controlled.

One end of the acoustic cable 345 is connected to the printed

circuit boards

381a and 381b, and the other side is exposed outside the housing 320. The housing 320 may include a cable hole through which the acoustic cable 345 penetrates. The cable hole may be formed in the earbud holder 325 to which the earbud 341 is coupled.

The acoustic cable 345 may move through the cable hole, and may include a storage module 210 for receiving the acoustic cable 345 inside the housing 320.

3 is a view showing the interior of the housing of the portable audio device 300 according to an embodiment of the present invention. The conventional storage module used a structure in which the acoustic cable 345 is wound around a circular wheel. However, since the conventional acoustic cable 345 has to be wound around the wheel, the acoustic cable 345 has a thin thickness. Since the thin acoustic cable 345 is poor in durability, defects in the acoustic cable 345 may occur, and the electrode connecting the acoustic cable 345 wound on the wheel and the main substrate 381 rotates together with the rotating module. There is a problem of low reliability. In addition, due to the size of the wheel, there is a limit in reducing the size of the housing 320, and as shown in FIG. 2, there is a problem that mounting on the slim housing 320 is impossible.

Accordingly, the portable sound device 300 of the present invention uses a thin storage module 210 instead of a form in which the sound cable 345 is wound on the wheel. 4 is a view for explaining the driving of the storage module 210 of the portable sound device 300 according to an embodiment of the present invention.

4 (a) is a state in which the acoustic cable 345 is accommodated in the storage module 210 of the portable audio device 300, and in FIG. 4 (b), the acoustic cable 345 is pulled out of the housing by pulling the earbuds. It is a diagram showing the state. The storage module 210 of the present invention includes a module case 211, a fixed roller 216, a moving bracket 215, a moving roller 214 and a driving unit 217.

The module case 211 is fixed to the housing 320 and includes a long interior space in the longitudinal direction of the housing. The fixing roller 216 is fixed to one side of the inner space, and the moving bracket 215 may have the storage module 210 reciprocating in the longitudinal direction (first direction). The moving bracket 215 moves between a first position (see Fig. 5(b)) adjacent to the fixed roller 216 and a second position (see Fig. 4(a)) that is most spaced from the fixed roller 216. .

The moving roller 214 is coupled to one side of the moving bracket 215 facing the fixed roller 216, and the acoustic cable 345 reciprocates between the fixed roller 216 and the moving roller 214, and the fixed roller 216 And the moving roller 214. The acoustic cable 345 may be reciprocally wound between the fixed roller 216 and the moving roller 214 a plurality of times to secure a sufficient length to allow the user to turn the head when the earbud 341 is worn.

Since the acoustic cable 345 is wound around the fixed roller 216 and the moving roller 214 a plurality of times, the seating groove formed along the outer circumferential surfaces of the fixed roller 216 and the moving roller 214 is prevented from being twisted between the acoustic cables. It can contain. The seating groove may be formed in proportion to the number of times the acoustic cable travels between the fixed roller 216 and the moving roller 214.

The fixed roller 216 and the moving roller 214 rotate around the

axes

214a and 216a in the second direction, which is a direction perpendicular to the first direction in which the moving roller and the moving bracket 215 move, and the fixed roller ( As the distance between the 216) and the moving roller 214 changes, the acoustic cable 345 may be accommodated inside the housing or drawn out. When the number of times that the acoustic cable 345 reciprocates between the fixed roller 216 and the moving roller 214 increases, the length of the entire storage module can be reduced, and the moving distance of the moving bracket 215 and the acoustic cable 345 ), the acoustic cable 345 may be drawn out twice as many times as the product of the number of times it is wound.

One end of the acoustic cable 345 extends to the outside of the housing and is connected to the earbuds, and the other end of the acoustic cable 345 extends to the other side of the storage module as shown in FIG. 4(b). 381).

When the user pulls the earbud 341, the acoustic cable 345 is pulled, and the moving bracket 215 moves to the first position. As the acoustic cable 345 is drawn out of the housing 320, the distance between the moving roller 214 and the fixed roller 216 is shortened, and as shown in FIG. 6, the moving bracket 215 is the first of the storage module 210. When the position is reached, the acoustic cable 345 is drawn to the maximum.

When receiving the acoustic cable 345, the moving bracket 215 is moved back to the second position by the rotational force of the driving unit 217, and the driving unit 217 is transmitted to the moving bracket 215 by the rotational force of the driving unit 217. ) And a wire 218 connecting between the movable bracket 215. The wire 218 induces a linear motion of the moving bracket 215 while being wound or unwound on the outside of the driving unit 217 according to the rotational direction of the driving unit 217. The wire 218 may be made of a flexible and rigid material such as an axle line, and the wire 218 may be more rigid and thin than the acoustic cable 345.

The conventional storage module 210 has a structure in which the acoustic cable 345 is wound directly on the rotating module, so that the number of times the driving unit 217 rotates in order to wind the entire acoustic cable 345, the main spring 2175 The size increases. In addition, since the acoustic cable 345 is thick and the diameter of the driving unit 217 becomes larger when the acoustic cable 345 is wound, the space in which the actual driving unit 217 is mounted increases.

However, since the length of the wire 218 wound on the outer surface of the driving unit 217 of the present invention corresponds to the movement distance of the movement bracket 215, that is, the distance between the first position and the second position, it is short and accordingly the spring spring ( The size of 2175) is also small, so the size of the driving unit 217 can be made smaller than in the prior art. Since the acoustic cable 345 is not directly wound on the driving unit 217, reliability can be improved, and even if the thickness is formed thicker than the conventional winding on the driving unit 217, the size of the portable acoustic device does not increase.

5 is an exploded perspective view showing the driving unit 217 of the portable sound device according to an embodiment of the present invention. The driving unit 217 is rotatably mounted inside the housing 320, and while rotating, the wire 218 is wound around the outside of the driving unit 217 to accommodate the acoustic cable 345 inside the housing 320, followed by The bud 341 (see FIG. 2) is fastened to the earbud holder 325 (see FIG. 2). The driving unit 217 includes a fixing unit 217a fixed to the housing 320 and a rotating unit 217b that rotates relative to the fixing unit 217a. The fixing part 217a may further include a case 2172 positioned on the exterior of the driving part 217.

The fixing part 217a includes a shaft 2171 that is a central axis of rotation of the driving part 217, and the rotating part 217b includes a cylindrical bobbin 2173 around which the wire 218 is wound. The bobbin (2173) is provided with a spring (2175) in the interior to provide a force to drive the rotation of the driving unit 217, the spring (2175) is a kind of spirally wound plate spring in the middle of the shaft (2171) It is fixed and the outer side is coupled to the rotating portion 217b.

When the user pulls the acoustic cable 345, the bobbin 2173 rotates in the first direction (counterclockwise on the drawing), so that the number of windings of the mainspring spring 2175 decreases, thereby having a restoring force due to elasticity. When the acoustic cable 345 is released, the mainspring 2175 rotates in the second direction (clockwise on the drawing) in which the bobbin 2173 is opposite to the first direction due to the restoring force, and the wire 218 is attached to the bobbin 2173. Is wound and housed inside the housing 320.

A rotation guide for controlling rotation of the rotating part 217b in the second direction by the elasticity of the spring spring 2175 may be further included. The rotation guide does not prevent the rotating part 217b from rotating in the first direction when the user pulls the wire 218 so that the rotating part 217b rotates naturally as the user pulls the wire 218 and the wire 218 It is withdrawn.

When the user removes the force pulling the acoustic cable 345 after the wire 218 is pulled out, the rotation of the rotating part 217b in the second direction is prevented from being received inside the housing 320 in the state where the wire 218 is pulled out. It may include a rotation guide for fixing the rotating portion (217b). In the rotation guide, when the wire 218 is pulled and released again, the fixing of the rotating portion 217b is released to rotate in the second direction by the elasticity of the spring spring 2175 so that the wire 218 is received.

The rotation guide includes a track 2177 and a bump 2179b, and the bump 2179b may be formed on the guide plate 2179. The track 2177 rotates like the rotation part 217b as part of the rotation part 217b, and the track 2177 moves on the track when rotating, causing a linear motion of the guide plate 2179. The track 2177 includes a concave recess to allow the bump 2179b to move along the track 2177. The guide plate 2179 moves according to the position on the track of the bump 2179b, and the shaft slot 2179a of the guide plate 2179 does not rotate, and performs linear motion.

The track 2177 includes a pair of circular tracks and a stop track positioned between the pair of circular tracks. When the rotating portion 217b is rotated, the bump 2179b moves along the circular track, and the bump 2179b is caught by the stop track to limit rotation of the rotating portion 217b.

The guide plate 2179 is a plate-shaped member and can be made by processing an injection material or a metal plate-shaped member. The guide plate 2179 is formed with a shaft slot 2179a, a bump 2179b, and a stopper boss 2179c. The shaft slot 2179a is an opening extending to one side of the guide plate 359, and the shaft 2171 passes through the shaft slot 2179a. The shaft slot 2179a serves to convert the rotational motion of the track 2177 into a linear motion, and the guide plate 2179 moves in the extending direction of the shaft slot 2179a.

A problem that the guide plate 2179 may rotate with the rotating portion 217b may occur, forming the guide slot 2178 extending in a direction parallel to the extending direction of the loft slot 2179a in the case 2172 which is a fixing portion. And by forming a guide boss (2179c) fastened to the guide slot (2178) on the guide plate (2179) can block the rotation of the guide plate (2179) and assist the linear motion in the direction of the shaft slot (2179a).

The guide boss 2179c has a longer rectangular or elliptical cross section in the extending direction of the guide slot 2178 so that the guide boss 2179c resists rotation of the rotating portion 217b and the guide plate 2179 stably moves linearly. Can.

6 is a view showing a case where the mobile bracket 215 reaches the first position in the storage module 210 of the present invention. As shown in (a) of FIG. 6, when the user pulls the acoustic cable 345 and the moving bracket 215 reaches the first position, the fixed bracket 212 and the movable bracket 215 to which the fixed roller 216 is fastened are There is a problem in that vibration caused by this collision is transmitted to the user's hand when it is pulled out to the maximum.

In addition, when such a collision occurs, an impact is applied to the acoustic cable 345 pulled by the user, so that the impact is concentrated on the portion 345a where the acoustic cable 345 is wound on the moving roller 214 and is bent, so that the acoustic cable 345 There is a problem that the reliability of.

In order to solve the above two problems, the present invention may further include a buffer stopper 213 as shown in FIG. 6(a). The buffer stopper 213 is located between the moving roller 214 and the fixed roller 216, and when the moving bracket 215 reaches the first point, the fixed bracket 212 and the impact can be relieved. In addition, the buffer stopper 213 compresses the acoustic cable 345 to prevent the force at which the withdrawal of the acoustic cable 345 is stopped from being concentrated in one place 345a.

7 is a view for explaining the operation of the buffer stopper 213 in more detail, the buffer stopper 213 is composed of a first rubber 2131 and a second rubber 2132 with an acoustic cable 345 therebetween. do. The second rubber 2132 can be attached to the module case 211 and the first rubber 2131 is hinged to the fixed bracket 212 to move the bracket 215 within a range that does not deviate from the fixed bracket 212. It can rotate according to the position of.

As shown in (a) of FIG. 7, before the moving bracket 215 moves to the first position, the first rubber 2131 does not squeeze the acoustic cable 345 so that the acoustic cable 345 freely follows the rotation of the roller. Move. As shown in (b) of FIG. 7, when the moving bracket 215 reaches the first position, the first rubber 2131 contacts the moving bracket 215 and compresses the acoustic cable 345. The first surface (2131a) and the second rubber (2132) for compressing the acoustic cable (345) are disposed to face each other, and the movable bracket (() is transmitted to the force applied by the movable bracket (215) to the first surface (2131a). 215) is in contact with the second surface (2131b) forms an inclined surface. That is, since the first surface 2131a and the second surface 2131b have an acute angle, the force applied to the second surface 2131b is transmitted to the first surface 2131a and the first surface of the first rubber 2131 ( As the distance between 2131a) and the second rubber 2132 is narrowed, movement of the acoustic cable 345 positioned therebetween is restricted.

When the moving bracket 215 reaches the first position, the moving bracket 215 stops and the force pulling the acoustic cable 345 is concentrated in one place 345a, but to the part fixed by the buffer stopper 213 By being added, the reliability of the acoustic cable 345 can be improved.

When the user pulls the acoustic cable 345 to the maximum, the shock absorber stopper 213 does not transmit unpleasant vibrations due to collision, thereby improving the feeling of use and preventing the disconnection of the acoustic cable 345, thereby increasing the reliability of the product. have.

When the length of the storage module 210 is decreased by increasing the number of times the acoustic cable 345 is wound, a space in which the main board 381 or the battery is mounted may be further secured, as shown in FIG. 2, and the band 310 In order to utilize the arrangement, the main substrate 381 may be divided into a plurality of unit substrates and connected to each of the flexible substrates to utilize the bent space to place components.

The portable sound device 300 of the present invention uses the simple storage module 210 instead of the conventional rotating storage module 210 to increase the reliability of the storage module 210 and reduce the size to make it slim. A portable audio device 300 having a structure can be implemented.

The above detailed description should not be construed as limiting in all respects, but should be considered illustrative. The scope of the invention should be determined by rational interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

Claims

main body;

A retractable module mounted inside the main body;

A printed circuit board mounted inside the main body;

One end is connected to the printed circuit board and the acoustic cable is received and drawn into the storage module; And

It includes an earbud connected to the other end of the acoustic cable,

The storage module

A fixed roller rotating the first shaft as an axis;

A moving bracket moving between a first position adjacent to the fixed roller and a second position spaced apart in a first direction;

A moving roller which rotates a second shaft fixed to the moving bracket on an axis;

A driving unit that rotates by the elasticity of the mainspring spring and restores the movable bracket to the second position; And

One end is coupled to the movable bracket, the other end is fixed to the driving unit and includes a wire wound around the driving unit,

The sound cable is a portable sound device, characterized in that reciprocating and winding between the fixed roller and the moving roller.
According to claim 1,

The fixed roller and the moving roller are formed along the outer circumference and include a seating groove corresponding to the width of the acoustic cable.
According to claim 1,

The driving unit further includes a ball stopper for fixing the acoustic cable when the force for drawing out the acoustic cable is removed,

The ball stopper is a portable sound device, characterized in that when the force for pulling the acoustic cable is shortly applied, the fixing of the acoustic cable is released and the acoustic cable is received by the storage module.
The method of claim 1

The storage module

Further comprising a module case containing the fixed roller, the movable bracket, the movable roller, and an opening through which the sound cable passes at one end and the other end,

The driving unit is a portable sound device, characterized in that located on the outside of the module case.
According to claim 1,

And a buffer stopper positioned between the fixed roller and the moving roller and fixing the sound cable when the moving bracket is moved to the first position.
The method of claim 5,

The buffer stopper

A first rubber positioned on one side of the acoustic cable wound between the moving roller and the fixed roller; And

And a second rubber located on the other side of the acoustic cable opposite to the first rubber,

When the mobile bracket reaches the first position, the portable sound device, characterized in that for compressing the sound cable by pressing the first rubber so that the gap between the first rubber and the second rubber decreases.
The method of claim 6,

The first rubber is a portable sound device, characterized in that the second surface contacting the mobile bracket with respect to the first surface contacting the wire forms an acute angle.
The method of claim 6,

A portable sound device further comprising a fixing bracket hinged to the first rubber adjacent to the fixing roller.