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11.发明申请公开(公告)号：US20210144462A1
公开(公告)日：2021-05-13
申请号：US17094090
申请日：2020-11-10
申请人： EM-TECH Co., Ltd.
发明人： Yong Hue Kim
IPC分类号： H04R1/10
摘要： Disclosed is a receiver unit having a pressure equilibrium structure and a compensation structure for a low frequency, including a receiver including a frame, a magnetic circuit, a voice coil, and a diaphragm, an upper casing covering an upper portion and a side surface of the receiver and having a sound insulation hole, and a lower casing attached to a lower surface of the receiver and coupled to the upper casing, wherein a ventilation recess is provided on an outer surface of the upper casing to allow air to flow between an upper space of the upper casing and a lower space of the lower casing, the receiver includes a back hole, and the lower casing includes a duct connecting the back hole and the lower space of the lower casing.
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公开(公告)号：US20210144461A1
公开(公告)日：2021-05-13
申请号：US17096011
申请日：2020-11-12
申请人： EM-TECH Co., Ltd.
发明人： Se Gwan Oh , Bae Nam Kim , Seung Kiu Jeong
IPC分类号： H04R1/10
摘要： Disclosed is an earbud including a head housing configured for insertion into a user's auricle and having a sound emitting hole, and a stick housing extending downward from the head housing, wherein the stick housing is inclined inward.
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公开(公告)号：US20210136484A1
公开(公告)日：2021-05-06
申请号：US17083942
申请日：2020-10-29
申请人： EM-TECH Co., Ltd.
发明人： Yong Ju Ji , Jun Hee Han , Young Seok Noh
摘要： Disclosed is a receiver module integrated with a duct. The present disclosure provides a receiver module integrated with a duct in which a back volume and a duct are provided at an outer circumference of a frame of a receiver.
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公开(公告)号：US10902984B2
公开(公告)日：2021-01-26
申请号：US16173775
申请日：2018-10-29
申请人： EM-TECH. Co., Ltd.
发明人： Ki Hyun Nam , Jae Baek Jang , Young Uk Jo
摘要： A linear actuator having an elastic injection-molded frame includes a yoke, a permanent magnet attached to a bottom surface of the yoke at a distance from a side surface of the yoke, a top plate attached to a top surface of the permanent magnet, a frame coupled to an outer periphery of the yoke and injection-molded with an elastic material, a protector disposed on the frame, and a coil secured to the protector, with a lower end positioned between the permanent magnet and the side surface of the yoke. The frame includes a yoke coupling portion coupled to the yoke, a fixing portion spaced apart from the yoke coupling portion and coupled to the protector, and two or more bridges for elastically connecting the yoke coupling portion and the fixing portion.
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公开(公告)号：US10863266B2
公开(公告)日：2020-12-08
申请号：US15888370
申请日：2018-02-05
申请人： EM-TECH. Co., Ltd.
发明人： Ji Hoon Kim , Gang Tae Kim , Jeong Seong Park
摘要： The present disclosure provides a reliable structure which can prevent disconnection of a voice coil lead wire, while employing a voice coil embodied as an aluminum coil to improve the mid-frequency band SPL of a slim high-pressure water resistant microspeaker. According to the present disclosure, there is provided a high-pressure water resistant microspeaker with an improved coil structure, including an FPCB attached to the outer surface of a frame, a pad of the FPCB extending inside the frame and another part of the FPCB extending outside the frame. The upper end of the voice coil is attached to an overlapping position of a side diaphragm and a center diaphragm, and the lower end of the voice coil is supported by the part of the FPCB extending inside the frame.
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公开(公告)号：US20190334076A1
公开(公告)日：2019-10-31
申请号：US16394170
申请日：2019-04-25
申请人： EM-TECH. Co., Ltd.
发明人： Cheon Myeong Kim , Ji Young Lee , Byung Ho Jung
摘要： A hybrid actuator is provided in which a piezoelectric element and an actuator are incorporated with each other. The hybrid actuator includes: a housing; a stator secured to the housing and having a coil; a vibrator having a permanent magnet configured to vibrate due to a mutual electromagnetic force with the stator; an elastic member configured to elastically support the vibrator relative to the housing; a piezoelectric element attached to one surface of the housing; and an F-PCB (flexible printed circuit board) applying an electric current to the piezoelectric element and the coil inside the housing. A part of the F-PCB extends outside the housing. Input terminals are formed on the part of the F-PCB which extends outside the housing. The input terminals are configured to receive a vibration signal and an audio signal so that the hybrid actuator can reproduce both the vibration signal and the audio signal.
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公开(公告)号：US20190260278A1
公开(公告)日：2019-08-22
申请号：US16280904
申请日：2019-02-20
申请人： EM-TECH Co., Ltd
发明人： Cheon Myeong Kim , Sung Chul Jung , Seul Ki Nam , Min Chul Kang
IPC分类号： H02K33/18
摘要： A mobile apparatus has a linear actuator configured to generate vibration and sound, and further includes: a display panel; a frame; and a linear actuator arranged on the frame and configured to vibrate at 50 to 300 Hz to generate a vibration signal or to vibrate at 50 to 20000 Hz to generate a sound signal. The frame encompasses a case for defining the external appearance with the display and an inner bracket on which electronic parts are to be arranged. As compared with a linear actuator that excites a display panel to generate only sound, the linear actuator that performs the vibration function should provide a strong vibration power, which may damage the display panel. This is the reason why the linear actuator is arranged on the frame, not on the display panel.
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公开(公告)号：US20190259362A1
公开(公告)日：2019-08-22
申请号：US16280945
申请日：2019-02-20
申请人： EM-TECH Co., Ltd
发明人： Cheon Myeong Kim , Sung Chul Jung , Seul Ki Nam
摘要： A hybrid actuator includes a housing for defining an external appearance, a stator having a coil, a vibrator having a permanent magnet which vibrates due to a mutual electromagnetic force with the stator, an elastic member for elastically supporting the vibrator relative to the housing, and a piezoelectric element attached to one surface of the housing.
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公开(公告)号：US20190131045A1
公开(公告)日：2019-05-02
申请号：US16173775
申请日：2018-10-29
申请人： EM-TECH. Co., Ltd.
发明人： Ki Hyun Nam , Jae Baek Jang , Young Uk Jo
摘要： A linear actuator having an elastic injection-molded frame includes a yoke, a permanent magnet attached to a bottom surface of the yoke at a distance from a side surface of the yoke, a top plate attached to a top surface of the permanent magnet, a frame coupled to an outer periphery of the yoke and injection-molded with an elastic material, a protector disposed on the frame, and a coil secured to the protector, with a lower end positioned between the permanent magnet and the side surface of the yoke. The frame includes a yoke coupling portion coupled to the yoke, a fixing portion spaced apart from the yoke coupling portion and coupled to the protector, and two or more bridges for elastically connecting the yoke coupling portion and the fixing portion.
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公开(公告)号：US20190104369A1
公开(公告)日：2019-04-04
申请号：US16136921
申请日：2018-09-20
申请人： EM-TECH. Co., Ltd.
发明人： Cheon Myeong Kim , Sung Chul Jung , Seul Ki Nam , Gyung Bo Ha
CPC分类号： H04R9/043 , H04R7/04 , H04R7/20 , H04R9/022 , H04R9/025 , H04R9/045 , H04R9/06 , H04R31/003 , H04R31/006
摘要： A sound converter includes a rectangular frame, a first suspension seated on an upper side of the frame to vibrate, a second suspension attached to a bottom surface of the first suspension and electrically connected to a voice coil to vibrate, a magnetic circuit including a center magnet, a plurality of sub-magnets spaced apart from the center magnet by a certain distance to define a magnetic gap, a plurality of top plates positioned above the center magnet and each sub-magnet, and a bottom plate positioned below the center magnet and each sub-magnet, and a third suspension connecting a lower end or a lower end lateral surface of the voice coil to the frame to vibrate. The voice coil is attached to a bottom surface of the second suspension. The third suspension is positioned through spaces defined by the sub-magnets being spaced apart from each other.
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