JP2010041199A - Slide type cellular phone terminal, echo canceling method, and cellular phone terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a slide type cellular phone terminal of a thin shape which certainly reduces echo which occurs at the time of speech. <P>SOLUTION: The cellular phone terminal has a first housing 110 with a microphone 111, and a second housing 130 which is connected to the first housing 110 so as to be freely slidable relative to the first housing 110, and has a dynamic type receiver 132 which generates sound in a front side of an opposite side of the surface facing the first housing 110. The second housing 130 has a tone guiding unit 142 which gives vibration of an inverse phase for a tone phase of the receiver 132 on a surface facing the first housing 110, and cancels the vibration from the receiver 132. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sliding portable terminal, an echo cancellation method, and a portable terminal in which a second casing including a receiver is slidably attached to a first casing including a microphone.

  2. Description of the Related Art Conventionally, as a mobile phone as a mobile terminal, a first casing as a transmitter with an operation unit and a microphone is slid onto a second casing as a receiver with a display surface and a receiver arranged on the upper surface. 2. Description of the Related Art A sliding mobile phone that is slidably joined via a rail is known.

  In a slide-type mobile phone, generally, a state in which the second housing covers the upper surface of the first housing and overlaps the first housing (closed state), and the second housing is longitudinal with respect to the first housing. The telephone can be talked both in the state where the operation key of the first housing is exposed (open state).

  The receiver used in the slide-type mobile phone generally uses a dynamic receiver, and is disposed in a receiver housing portion that partitions the second housing. The receiver housing part closes the back side of the installed receiver to form a resonance space, and the front side is covered with a front wall part having a sound generation hole, and the sound from the front side to the listener and the phase opposite to this sound. The sound from the back side, which is the sound of, is prevented from being heard.

  In this slide type mobile phone, when a call is made in the closed state, the voice of the other party from the receiver of the second casing is transmitted through the gap between the first casing and the second casing. Easy to enter the microphone. As a result, a phenomenon (echo) occurs in which the voice uttered by the other party is transmitted to the other party.

In order to reduce this echo, for example, in Patent Document 1, the gap between the operation unit casing (first casing) and the display unit casing (second casing) is separated from the gap between the operation unit casing (second casing). A protrusion is provided around the microphone hole provided on the top surface of the tip. Thus, when the display unit casing is stacked on the operation unit casing, the display unit casing is stacked on the operation unit casing by contacting the display unit and partitioning the microphone hole and the gap. This makes it difficult for voice to enter the microphone during a call in a state.
JP 2006-135889 A

  In recent years, there has been a demand for reducing the thickness of a slide-type mobile phone, and there is a desire to further reduce the thickness by eliminating even the protrusions in the configuration of Patent Document 1.

  Further, in the slide type mobile phone of Patent Document 1, in a state where the display unit casing is overlapped on the operation unit casing, the microphone hole surrounds the upper surface of the distal end portion of the operation unit casing that is continuous with the gap. Since the sound is exposed to the outside in a state surrounded by the protrusions, there is a possibility that sound transmitted through the gap may wrap around from the tip side and enter the microphone.

  The present invention has been made in view of such a point, and in a slide type mobile terminal such as a slide type mobile phone, a thin slide type mobile terminal, an echo cancellation method, and a mobile terminal that can reliably reduce echo generated during a call are provided. The purpose is to provide.

  A sliding portable terminal according to the present invention is connected to a first casing having a microphone, and is slidably connected to the first casing on the first casing, and is opposite to a surface facing the first casing. A vibration is applied to a second housing provided with a receiver that generates sound on the front surface side and at least one of the first housing and the second housing based on the sound of the receiver. The structure which has a vibration provision means to take is taken.

  A portable terminal of the present invention, a housing having a microphone, a receiver that is provided in the housing and generates sound to the outside through a sound emitting hole formed on one surface of the housing facing the sound generation surface; A configuration having vibration applying means configured by a wiring board located on the back side opposite to the sound generation surface of the receiver or a sound guide portion that guides the back plate portion of the housing to vibrate the back plate portion. take.

  The echo cancellation method of the present invention is an echo cancellation method for use in a portable terminal having a receiver and a microphone in a casing, and prevents echo generated when sound of the receiver enters the microphone during a call. Thus, a vibration having a phase opposite to the phase of the sound generation of the receiver is applied to a portion of the housing located on the back side of the receiver.

  ADVANTAGE OF THE INVENTION According to this invention, the thin slide type portable terminal which can reduce reliably the echo which generate | occur | produces at the time of a telephone call is realizable.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a main part showing a configuration of a sliding mobile phone as a sliding mobile terminal according to Embodiment 1 of the present invention, and FIG. 2 is an enlarged view of a receiver in the sliding mobile phone shown in FIG. . In this embodiment, front, rear, left, and right refer to the front, rear, and left when the direction in which the operation unit is slid by viewing the display surface of the sliding mobile terminal is viewed from above. , Means right.

  As shown in FIG. 1, the slide type mobile phone 100 is slidably attached via a slide movable unit 120 on the front side of the first case 110 having a microphone 111 and the first case 110, and a display surface 131. And a second housing 130 having a receiver 132, and a sound guide portion 142 (see FIG. 2) which is a vibration applying means.

  The first housing 110 has a rectangular plate shape, and a wiring board 112 on which the microphone 111 is mounted is disposed. The microphone 111 is disposed on one end (front end) 110a side of the end portions 110a and 110b that are separated in the longitudinal direction in the first housing 110, and is disposed below the sound hole 114 formed on the surface of the one end portion 110a. Has been.

  The first housing 110 is disposed on the surface of the other end portion (rear end portion) 110b among the end portions separated in the longitudinal direction, with the slide movable portion 120 being superimposed on the first housing 110. Two housings 130 are slidably mounted on the surface of the first housing 110. Note that the slide movable unit 120 has a first casing 110 and a second casing 130 disposed on the surface of the first casing 110 in one direction along the surface of the first casing 110, here. Slidably connected in the longitudinal direction. For example, the slide movable unit 120 includes a rail that is provided in one casing so as to extend in the movement direction, and a member that is provided in the other casing and slides on the rail.

  The second housing 130 has a rectangular plate shape that is substantially the same shape as the first housing 110, and has a liquid crystal unit 133 disposed on the surface facing the display panel serving as the display surface 131, a receiver 132, and the like. Is arranged.

  The receiver 132 is provided in the second housing 130 so as to sound toward the surface side at the end portion 130b on the side separated from the end portion 110a located on the microphone 111 in the longitudinal direction, here the rear end portion side. ing.

  The receiver 132 shown in FIG. 2 is a dynamic receiver, and the front surface 132a that is a sound generation surface is opposed to a sound emitting hole 134 formed on the surface (display surface 131) of the second housing 130. 2 is housed in a receiver housing portion 135 formed in the housing 130. The receiver 132 is hermetically sealed on the back side by being accommodated in the receiver accommodating portion 135. The receiver 132 is not limited to a dynamic type, and may be a ceramic type, for example.

  FIG. 3 is a view for explaining the arrangement position of the receiver accommodated in the second housing, and is a cross-sectional view taken along the line AA in FIG. 2.

  The receiver housing portion 135 that houses the receiver 132 includes a back plate portion 136 inside the second housing 130, a rear end wall portion 137 that is disposed orthogonal to the back plate portion 136, and both side partition wall portions. 138, the front partition wall 139, and the front wall 141 that is disposed to face the sound generation surface of the receiver 132 and includes a hole 141a that communicates with the sound emission hole 134.

  The second housing 130 in which the receiver 132 is arranged in this way is provided with a sound guide portion 142 that guides sound generation from the front side of the receiver 132 to the back plate portion 136 in which no sound emission hole is formed. Yes.

  The sound guide unit 142 is provided in at least one of the first housing 110 and the second housing 130, here the second housing 130, and the receiver 132 on the back plate portion 136, which is a surface facing the first housing 110. Vibration is applied based on the pronunciation of

  In other words, the sound guide portion 142 is provided on at least one of the first housing 110 and the second housing 130, here the second housing 130, and on the back plate portion 136 that is a surface facing the first housing 110. A vibration having a phase opposite to the sound generation phase of the receiver 132 is applied. The sound guide unit 142 imparts vibration to cancel the vibration of the receiver 132 to the back plate unit 136.

  Specifically, the sound guide 142 is a part of the display panel 131 that is located on the front side of the receiver 132, and a front wall 141 that is disposed facing the part 131a at a distance from the front wall 141. The front partition wall 139 is orthogonal to the front wall 141, and the support wall 143 is disposed to face the front partition wall 139 and supports the liquid crystal unit 133.

  Here, the front wall 141 and the upper part of the front partition wall part 139 and the rear end wall part 137 are made of separate members formed continuously, and the separate members are placed on the receiver 132 mounted on the back plate part 136 from the upper surface side. Covered. A lower end portion of the front partition wall portion 139 is airtightly joined to the back plate portion 136 via the cushion material 145.

  In addition, a cushion material 146 is interposed between the front wall 141 and the front surface of the receiver 132 so as to surround a hole portion 141 a communicating with the sound emission hole 134, and airtightness is maintained on the sound generation side of the receiver 132. Has been.

  As described above, the sound guide portion 142 communicates with the sound hole of the receiver 132, and at one end thereof, the sound guide portion 142 abuts on the back plate portion 136 and is partitioned by the back plate portion 136. That is, the sound generation of the receiver 132 is guided to the back plate part 136 by the sound guide part 142.

  In the slide-type mobile phone 100 configured as described above, when the receiver 132 generates a sound, a sound having a phase opposite to that of the sound generation is generated from the back surface of the receiver 132 from the sound generation surface side.

  In the present embodiment, sound emitted from the front surface of the receiver 132 is transmitted to the back plate part 136 via the sound guide part 142. In the back plate portion 136, vibration due to sound from the sound generation surface of the receiver 132 is added via the sound guide portion 142 to vibration due to the reverse phase sound from the back surface of the receiver 132.

  As a result, as shown in FIG. 2, the vibration from the back side of the receiver 132 transmitted to the back plate portion 136 is canceled by the reverse-phase vibration from the front side of the receiver 132. That is, the sound of the receiver 132 adds a vibration having an opposite phase to the vibration transmitted from the back side of the receiver 132 to the back plate portion 136 of the second housing 130, thereby reducing the resonance component that becomes an echo in the housing.

  In particular, in the case of a portable terminal having a slide-type housing, when the slide movable part is configured by a rail provided in one housing and a member provided in the other housing and sliding on the rail, the receiver Echoes are easily transmitted from the casing provided with the microphone to the casing provided with the microphone.

  In addition, in the sliding portable terminal, when the thickness is reduced, the thickness of the first casing and the second casing constituting the casing is reduced. Therefore, the volume inside the second housing on the receiver back side is reduced, and the back pressure at the time of sounding the receiver cannot be absorbed by the volume on the receiver back side, and the housing itself that houses the receiver 132 resonates greatly.

  In other words, the thickness of the casing itself is thin and easily shaken, and the back cabinet itself that is resonating on the back side of the receiver 132 is also reduced, and the pressure on the back side of the receiver 132 itself is increased during reception. 2 The housing 130 vibrates and an echo is likely to occur.

  On the other hand, in the present embodiment, vibration from the sound generation surface side during sound generation of the receiver 132 is transmitted to the back plate portion 136 of the second housing 130 that is the back surface of the receiver 132 via the sound guide portion 142. On the other hand, it is added as a vibration having a phase opposite to that of the vibration output from the back surface of the receiver 132 transmitted to the back plate portion 136.

  Thereby, regardless of the thickness of the housing, vibration transmitted from the second housing 130 with the receiver 132 to the gap G between the second housing 130 and the first housing 110 can be reduced. The resonance of the sound of the receiver 132 in the gap G between the two 110 and 130 can be reduced.

  As described above, in the sliding mobile phone 100, even when a call is made with the second housing having the receiver overlaid on the first housing 110 having the microphone 111, the microphone of the first housing has the second It is possible to realize a thin slide-type mobile phone in which sound from the receiver 132 of the housing 130 is difficult to enter and the generation of echoes is reduced.

  FIG. 4 is a diagram showing the echo level generated by the configuration of the present embodiment and the echo level of the conventional configuration.

  As shown in FIG. 4, in the present embodiment, in the back plate portion 136 on the back side of the receiver 132 that forms the gap G between the receiver 132 and the microphone 111, vibration generated from the back side of the receiver 132 is prevented. By applying anti-phase vibration from the sounding surface side of the receiver 132 by the sound guide unit 142, an echo of about 10 dB can be reduced.

  As described above, in the mobile phone 100, the sound guide 142 serving as the vibration applying unit causes the back plate 136 located on the back side of the receiver 132 in the second housing to have a phase opposite to the sounding phase of the receiver 132. Apply vibration. Thereby, the resonance of the case which consists of the 1st housing | casing 110 and the 2nd housing | casing 130 is reduced, and the echo which generate | occur | produces when the sound of the receiver 132 enters into the microphone 111 at the time of a telephone call can be reduced.

  As described above, in the present embodiment, unlike the conventional echo cancellation technology, it is not necessary to increase the number of parts by performing echo cancellation by signal processing using two microphones, and with a simple configuration, echo reduction can be achieved. realizable. In particular, unlike the conventional case, since no protrusion or the like is provided on the surface of the first housing that faces the second housing, the receiver 132 is in a state in which the second housing is closed by reducing the height by the height of the protrusion. It is possible to reduce the echo due to the pronunciation.

  In the present embodiment, the sound guide portion 142 in the second housing 130 is arranged along the front side of the receiver 132. However, the sound generation from the sound generation surface of the receiver 132 is referred to as the sound generation surface in the receiver 132. The configuration is not limited to this as long as the sound is guided to the back side, which is the opposite side, and may be formed at any position. For example, it may be formed along at least one of both sides of the receiver 132 as indicated by a broken line in FIG. 2 or may be formed along both sides.

(Embodiment 2)
FIG. 5 is a cross-sectional view schematically showing a main configuration of a sliding mobile phone as a sliding mobile terminal according to the second embodiment. In the present embodiment, front, rear, left, and right are the same as the slide type mobile phone 100 of the first embodiment, and the display unit of the slide type mobile terminal is viewed from above, and the operation unit is exposed by sliding. This means front, rear, left, and right when the direction to be moved is back. Note that the same components as those of the sliding mobile phone 100 of Embodiment 1 are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 5, the slide-type mobile phone 200 is slidably attached to the first casing 210 having the microphone 111 and the front side of the first casing 210 via the slide movable unit 120, and the display surface 131. And a second housing 230 having a receiver 132 and a speaker 212 as vibration applying means.

  The first casing 210 has a rectangular thin plate shape, and a wiring board 112 on which the microphone 111 is mounted is disposed. A speaker 212 that emits a ringtone or the like is mounted on the wiring board 112. Yes. The microphone 111 is disposed on one end (front end) 210a side of the first casing 210 that is separated in the longitudinal direction, and is disposed below the sound hole 114 formed on the surface of the one end 210a. .

  The speaker 212 is provided on at least one of the first casing 210 and the second casing 230 (here, the first casing 210) and faces the other (here, the second casing 230) (the first casing). A vibration is applied to the surface of the body 210 and the wiring board 112 based on the sound of the receiver 132.

  In addition, the speaker 212 is disposed apart from the microphone 111 in the first housing 210, and is arranged with the sound generation surface on the back side of the first housing 210 on the other end (rear end) 210 b side. . A sound hole 214 is formed in a portion of the back surface portion 210 c of the first housing 210 facing the speaker 212, and the speaker 212 is radiated through the sound hole 214. The speaker 212 transmits a vibration that cancels the vibration caused by the sound of the receiver 132 to the first casing 210 during the sound of the receiver 132. In other words, the speaker 212 transmits the opposite phase of the sound produced by the receiver 132 to the first housing 210 when the receiver 132 produces sound. That is, the speaker 212 is provided in the first casing 210 and vibrates in a phase opposite to the sounding phase of the receiver 132 on the surface of the first casing 210 facing the second casing 230 and the wiring board 112. It functions as a vibration applying means for applying.

  On the surface of the rear end portion 210 b of the first housing 210, a second housing 230 disposed on the first housing 210 is placed on the surface of the first housing 210 via the slide movable unit 120. It is slidably attached.

  The second housing 230 has a rectangular plate shape that is substantially the same shape as the first housing 210, and includes a liquid crystal unit 133 disposed on the surface facing the display panel 131 that serves as a display surface, and a receiver 132. Is arranged.

  The receiver 132 is arranged in the second housing 230 so as to emit sound toward the surface side of the second housing 230 with the sound generation surface facing the surface. Here, the receiver 132 is spaced apart from the end (front end) 230a on the side facing the microphone 111 in the second casing 230 in the longitudinal direction, similarly to the arrangement position of the second casing 130 in the first embodiment. It is provided on the rear end 230b side.

  The receiver 132 is a dynamic speaker, and is housed in a receiver housing portion 235 in which the periphery is partitioned by a partition wall portion so that a resonance space is formed on the back surface side in the second housing 230.

  FIG. 6 is an enlarged cross-sectional view of a main part showing a receiving part of the receiver 132.

  As shown in FIG. 6, the receiver 132 is disposed in a receiver accommodating portion 235 partitioned in the second housing 230.

  The receiver accommodating portion 235 is disposed so as to close a region surrounded by the back plate portion 233 of the second housing 230, the partition wall portion 236 disposed so as to rise from the back plate portion 233, and the partition wall portion 236, And a front wall portion 238 having a sound hole 238a. Here, one side wall portion of the partition wall portion 236 surrounding the receiver 132 is formed by the rear end wall portion 237 of the second housing 230 here.

  The receiver 132 is placed on the back plate portion 233 in the receiver accommodating portion 235, and a front wall portion 238 is disposed so as to face the front surface serving as a sound generation surface. A cushion material 146 is interposed between the front wall portion 238 and the receiver 132. A sound hole 238 a communicating with the sound emission hole 134 is formed in the front wall portion 238.

  A cushion material is interposed between the front wall portion 238 and the display surface 131, and the sound of the receiver 132 is emitted from the surface side of the second housing 230 via the sound hole 238 a and the sound emission hole 134. Sounded.

  FIG. 7 is a functional block diagram of the sliding mobile phone.

  As shown in FIG. 7, the sliding mobile phone 200 includes a wireless unit 241 that communicates with a communication partner, a voice control unit 243, a receiver driving unit 245 that drives the receiver 132, and a speaker driving unit 247 that drives the speaker 212. And a phase control unit 248 and an amplification unit 249 that amplifies the sound information collected by the microphone 111.

  In the sliding mobile phone 200, the wireless unit 241 transmits / receives information necessary for a call to / from a communication partner, and particularly outputs voice information from the communication partner to the voice control unit 243.

  The voice control unit 243 controls each function of the sliding mobile phone 200. When voice information is received from the communication partner via the voice call radio unit 241, the voice control unit 243 drives the receiver driving unit 245 to receive the receiver. The communication partner's voice is pronounced from 132. When the voice information from the communication partner is input, the voice control unit 243 outputs the voice information from the communication partner to the phase control unit 248. In addition, the voice control unit 243 transmits the voice from the microphone 111 amplified by the amplification unit 249 to the outside via the wireless unit 241. The phase control unit 248 inverts the phase of the input audio and outputs it to the speaker driving unit 247. The speaker driving unit 247 drives the speaker 212 to cause the speaker 212 to emit a sound having a phase opposite to that of the voice of the communication partner. As described above, when the voice from the communication partner is input, the voice control unit 243 drives the receiver driving unit 245 to generate the voice of the communication partner from the receiver 132, and the voice of the communication partner is output by the phase control unit 248. And the sound is generated from the speaker 212 via the speaker driving unit 247. The sound generation phase and volume of the speaker are adjusted by the audio control unit 243 using the phase control unit 248.

  Next, an operation during a call in a state in which the second casing 230 is overlapped with the first casing 210 in the sliding mobile phone 200 will be described.

  FIG. 8 is a diagram illustrating an operation during a call in a state where the second housing is overlapped with the first housing in the sliding mobile phone as the sliding mobile terminal according to the second embodiment.

  When voice information is input from a communication partner via the wireless unit 241 when a call is made with the second casing 230 superimposed on the first casing 210, the voice control unit 243 displays the input voice. Then, the receiver driving unit 245 is driven to generate sound from the receiver 132. At the same time, the voice control unit 243 drives the speaker drive unit 247 to generate the voice of the communication partner whose phase is reversed by the phase control unit 248 from the speaker 212.

  That is, the ring tone speaker 212 and the receiver 132 are simultaneously sounded in opposite phases.

  Accordingly, the vibration f1 transmitted from the back side of the receiver 132 due to the sound of the receiver 132 is transmitted to the second housing 230, and the back plate portion 233 of the second housing 230 resonates, and the first housing 210 is resonated. Is transmitted to the microphone 111 via the gap G between the first housing 210 and the microphone 111 via the wiring board 112 due to the sound of the receiver 132.

  As a result, the vibration G1 from the receiver 132 and the vibration f1 from the receiver 132 are in opposite phases on the gap G between the first housing 210 and the second housing 230, and on the front and back surfaces that are the sound generation surfaces of the microphone 111. The vibration f2 from the speaker 212, which is the vibration, is canceled out and resonance (echo component) of the housing is reduced.

  In the present embodiment, similarly to the sliding mobile phone 100 of the first embodiment shown in FIG. 4, in the case having a gap G between the receiver 132 and the microphone 111, An antiphase vibration is added to the vibration transmitted to one housing 210, and an echo of about 10 db can be reduced.

  As described above, according to the present embodiment, it is possible to reduce echo generated during a call in a closed state with a simple configuration without increasing the number of parts. Specifically, it is not necessary to provide a protrusion or the like on the surface of the first casing that faces the second casing, and the thickness of the protrusion can be reduced. Further, by using existing components such as a ring tone speaker and a receiver, echo can be reduced without using two microphones and performing echo canceller in signal processing.

  In other words, the speaker 212 as the vibration applying means applies a vibration having a phase opposite to the sounding phase of the receiver 132 to the first housing 210 that is a part located on the back side of the receiver 132. The resonance of one casing 210 can be reduced, and an echo generated when the sound of the receiver 132 enters the microphone 111 during a call can be prevented.

  The slide-type mobile phone according to the present invention is not limited to the above-described embodiments as a slide-type mobile terminal, and can be implemented with various modifications.

  In each of the above embodiments, the vibration applying means for applying vibration having a phase opposite to the sound generation phase of the receiver 132 to a portion of the housing facing the surface opposite to the sound generation surface of the receiver 132 is introduced. Although the sound unit 142 or the speaker 212 is applied to the slide-type mobile phones 100 and 200, the present invention is not limited thereto, and may be applied to a bar-type mobile terminal or a foldable mobile terminal.

  INDUSTRIAL APPLICABILITY The sliding mobile terminal, the echo cancellation method, and the mobile terminal according to the present invention have an effect of reliably reducing echo generated during a call in a sliding mobile terminal such as a sliding mobile phone, and are useful as a sliding mobile phone. It is.

Sectional drawing which shows the principal part which shows the structure of the sliding mobile telephone as a sliding mobile terminal which concerns on Embodiment 1 of this invention. Enlarged view of the receiver in the slide type mobile phone shown in FIG. Sectional drawing of the principal part explaining the arrangement position of the receiver accommodated in the second housing The figure which shows the echo level generate | occur | produced by the structure of this Embodiment, and the echo level of a conventional structure Sectional drawing which shows typically the principal part structure of the sliding mobile telephone as a sliding mobile terminal which concerns on this Embodiment 2. FIG. The principal part expanded sectional view which shows the accommodating part of a receiver Functional block diagram of the sliding mobile phone The figure which shows the operation | movement during a telephone call in the state which accumulated the 2nd housing | casing on the 1st housing | casing in the sliding mobile phone as a sliding mobile terminal of this Embodiment 2. FIG.

Explanation of symbols

100, 200 Sliding mobile phone 110, 210 First casing 111 Microphone 120 Slide movable section 130, 230 Second casing 132 Receiver 136, 233 Back plate section of second casing 142 Sound conducting section 212 Speaker 243 Audio control section 248 Phase controller G Gap

Claims (6)

A first housing having a microphone;
A second housing comprising a receiver that is slidably coupled to the first housing on the first housing and that generates a sound on the surface opposite to the surface facing the first housing;
Vibration applying means provided on at least one of the first housing and the second housing and applying vibration to a surface facing the other based on the sound of the receiver;
A slide-type portable terminal. The vibration applying means includes
A guide that is provided in the second housing and that vibrates the back plate by guiding the sound of the receiver to the back plate of the second housing located on the back side opposite to the sound generation surface of the receiver. The sliding portable terminal according to claim 1, comprising a sound part.   2. The sliding portable terminal according to claim 1, wherein the vibration applying unit is a speaker that is provided in the first housing and generates vibrations having a reverse phase of sound generation in the receiver. 3. The microphone is mounted to provide a contact point on a wiring board disposed in the first housing,
The speaker is mounted spaced apart in the longitudinal direction from the mounting position of the microphone on the wiring board, and receives an incoming call that produces a ringtone on the back side through a sound generation hole formed on the back side of the first housing. A speaker for sound,
Having a controller that sounds the speaker simultaneously with the sound from the receiver;
The sliding portable terminal according to claim 3, wherein the control unit adjusts a sound generation phase and a volume of the speaker. A housing having a microphone;
A receiver that is provided in the housing and generates sound through a sound emitting hole formed on one surface of the housing facing the sound generation surface;
Vibration applying means configured by a sound guide portion that guides the wiring board located on the back side opposite to the sound generation surface of the receiver or the back plate portion of the housing to vibrate the back plate portion;
A mobile terminal. An echo canceling method that is used in a portable terminal having a receiver and a microphone in a housing, and prevents echo generated by the sound of the receiver entering the microphone during a call,
An echo canceling method in which vibration applying means applies vibration having a phase opposite to the phase of sound generation of the receiver to a portion of the housing located on the back side of the receiver.

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