JP2006115272A - Portable terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable terminal for improving the holding/transmission performance of sound pressure and the degree of freedom in layout. <P>SOLUTION: A duct 12 is provided between a voice passage hole 11 of a casing 7a and the sound output 10a of a speaker 10 arranged in the casing 7a, and the sectional area of a voice passage hole side opening 19 is narrower than that of a voice output side opening 18 in the duct 12. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mobile terminal.

  Conventionally, a small mobile terminal such as a mobile phone or a PHS (simple mobile phone) has been used. As an example of the mobile terminal, as shown in FIG. On the front side of the body), in order from the top, the voice passage hole 3 through which the voice from the speaker 2 is emitted during a call, the display unit 4 on which letters, numbers, etc. are displayed, the input of telephone numbers and the setting of various modes, etc. And a microphone hole 6 for capturing a voice during a call. A rear case 1b (housing) is assembled on the back surface of the front case 1a (housing), and between the front case 1a and the rear case 1b, a liquid crystal display of the speaker 2 and the display unit 4 and Various components such as a printed circuit board are incorporated.

  In the portable terminal as shown in FIG. 9, a telephone number is input and various modes are set by pressing the operation key 5, and the contents are displayed on the display unit 4, while the speaker 2 is used during a call. Is emitted from the voice passage hole 3 and the voice of the speaker is captured by the microphone (not shown) through the microphone hole 6.

  As a conventional structure for mounting the speaker in such a portable terminal, a method of sandwiching the speaker with a housing and a screw, a method of sandwiching the speaker with a housing and a bracket, and fixing with a screw, a nail, etc., Alternatively, a rubber ring or the like is disposed between the sound output portion of the speaker and the sound passage hole of the housing to improve airtightness, but the distance between the sound output portion of the speaker and the sound passage hole of the housing. However, it is difficult to apply such a structure in a layout where the distance between them is far.

Therefore, the patent applicant applied for a portable device having the structure shown in Patent Document 1 first. In Patent Document 1, airtightness is improved by a structure in which a duct is attached to a speaker and the speaker is sandwiched between a cap and an elastic member.
JP 2001-119773 A

  However, in Patent Document 1, since the shape of the duct has a substantially constant cross section, further improvements have been desired in terms of sound pressure retention / transmission performance and layout flexibility.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a portable terminal capable of improving sound pressure holding / transmitting performance and layout flexibility.

  The portable terminal of the present invention has a duct between the sound passage hole of the housing and the sound output portion of the speaker disposed in the housing, and the duct has a sound passage hole with respect to the cross-sectional area of the sound output side opening. The side opening has a narrow cross-sectional area.

  In the portable terminal, it is preferable that the duct has a sectional area gradually decreasing from the sound output side opening toward the sound passage hole side opening, and at least one wall surface forming the duct forms a curved surface part.

  In the mobile terminal, a duct center line connecting the sound output side opening center and the sound passage hole side opening center of the duct may be inclined with respect to the normal line of the sound output part of the speaker.

  In the mobile terminal, at least one of the sound passage hole side opening and the sound passage hole of the duct may be inclined with respect to a plane orthogonal to the normal line of the speaker.

  In the portable terminal, it is preferable that the opening surface area of the voice passage hole side opening is larger than the minimum sectional area of the sectional areas of the duct.

  In the portable terminal, the duct is preferably a bracket that fixes the speaker to a housing.

  In the portable terminal, it is preferable that the casing has a curved surface portion corresponding to the curved surface portion of the duct.

  In the portable terminal, it is preferable that a coupling portion that couples the casing and the other casing is provided outside the curved surface portion of the duct.

  In the portable terminal, it is preferable to dispose a first elastic body between the duct and the sound passage hole side housing.

  In the portable terminal, it is preferable to dispose a second elastic body between the duct and the speaker.

  In the mobile terminal, it is preferable to dispose a third elastic body between the speaker and a housing facing the sound passage hole side housing.

  In the portable terminal, it is preferable that at least one of the first, second, and third elastic bodies is deformed.

  In the portable terminal, it is preferable that the duct has a guide portion for guiding the conductive wire.

  In the mobile terminal, it is preferable that a conducting wire is disposed in a space between the duct and the housing.

  In the portable terminal, it is preferable that the lead wire passes between the casing and the other casing through the coupling portion.

  According to the portable terminal of the present invention, since the cross-sectional area of the duct is gradually reduced from the sound output side opening toward the sound passage hole side opening, there is an effect that good sound pressure holding / transmitting performance can be ensured.

  Further, the duct cross-sectional area gradually decreases toward the sound passage hole side opening, and the duct is inclined with respect to the speaker, so that it can be applied to various layouts in which the positions of the speaker and the sound passage hole are changed. There is.

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

  1 to 3 show an example of an embodiment for carrying out the present invention, and a foldable mobile phone in which ends of a display-side housing 7 and a key-side housing 8 are connected to each other by a coupling portion 9 so as to be rotatable. Shows the case. The display-side casing 7 is composed of an inner casing 7a and an outer casing 7b when folded, and the end of the display-side casing 7 on the coupling portion 9 side is a key-side casing. It protrudes from the end of 8. A speaker 10 that emits a warning sound, ringtone, music or other sound is accommodated on the outer casing 7b side in the projecting portion of the display-side casing 7, and the sound emitted from the speaker 10 is projected from the inner casing 7a. A duct 12 for guiding to the sound passage hole 11 formed in the portion 7 a ′ is disposed between the speaker 10 and the sound passage hole 11. In FIG. 1, reference numeral 13 denotes a display unit provided in the housing 7 a of the display-side housing 7, and a liquid crystal display 14 is provided inside the display unit 13.

  As shown in FIG. 2, the coupling portion 9 is provided on one display side coupling portion 9 a of the display side coupling portions 9 a and 9 a ′ provided on the left and right sides of the display side housing 7 and on the left and right sides of the key side housing 8. The key-side coupling portions 9b and 9b ′ are connected to one key-side coupling portion 9b in a cantilever manner, and the other display-side coupling portion 9a ′ is a dummy including only the conductor hole 33. A lead wire is led from the key side joint portion 9b ′ to the key side housing 8 through a lead wire, which will be described later, into the lead wire hole 33 of the display side joint portion 9a ′.

  When the foldable mobile phone is placed on a desk in a folded state as shown in FIG. 1, a space is formed between the overhanging portion 7a ′ of the housing 7a and the desk, whereby the voice passage hole 11 is formed. Sounds such as warning sounds and ringtones emitted from the sound are transmitted to the outside through the interval, so that the sound can be heard outside. Further, as shown in FIG. 3 from the state of FIG. 1, when the display side housing 7 is opened upward with the coupling portion 9 as the center, the sound passage hole 11 faces upward. The sound from the sound passage hole 11 can be heard. In FIG. 3, 15 is a speaker hole for calling provided in the display-side casing 7, 16 is a microphone hole for calling provided in the key-side casing 8, and 17 is an operation key.

  In the foldable mobile phone, as described above, the speaker 10 and the connecting portion 9 are connected to the display-side housing as shown in FIG. 1 in order to be able to hear the sound when folded or opened. 7 need to be arranged on the same side end portion, and there is a problem that the speaker 10 and the coupling portion 9 interfere with each other.

  Because of this interference problem, as shown in FIG. 2, the display side coupling portion 9a is inserted into the lower side of the speaker 10 so as to be wrapped. For this reason, the sound passage hole 11 is formed at a position offset to the right side with respect to the speaker 10 as shown in FIG.

  Therefore, the duct 12 needs to guide the sound from the sound output portion 10a of the speaker 10 to the offset sound passage hole 11, and therefore the duct 12 outputs the sound that surrounds the sound output portion 10a of the speaker 10. A duct center line 20 connecting the center of the part side opening 18 and the center of the sound passage hole side opening 19 is inclined with respect to the normal S of the speaker 10 in the left-right direction at an angle α.

  Further, the duct 12 is formed with a curved surface portion 21 that is gently curved so as to avoid the display side coupling portion 9a. Accordingly, in the duct 12, the left and right widths of the flow path gradually decrease from the sound output side opening 18 toward the sound passage hole side opening 19, whereby the duct 12 passes the sound from the sound output side opening 18 through the sound. The cross-sectional area gradually decreases toward the hole side opening 19.

  On the other hand, as shown in FIG. 1, the speaker 10 is attached to the display-side housing 7 so as to be inclined, so that the duct 12 has the center of the sound output side opening 18 and the sound passage hole side opening 19. A duct center line 22 connecting the center of the speaker 10 is inclined with respect to the normal S of the speaker 10 in the front-rear direction (longitudinal direction of the display-side housing 7) at an angle β.

  Further, the duct 12 is formed with a curved surface portion 23 that is gently curved together with the housing 7a so as to avoid interference with the end of the key-side housing 8. Accordingly, the duct 12 also has a gently decreasing width in the front-rear direction of the flow path from the sound output side opening 18 toward the sound passage hole side opening 19. The cross-sectional area gradually decreases toward the hole side opening 19.

  In FIG. 1, the front and rear walls of the sound passage hole side opening 19 are shifted upward and downward so that the cross sectional area of the duct 12 that gradually decreases toward the sound passage hole side opening 19 is minimized. The opening surface area of the sound passage hole side opening 19 is made larger than the sectional area of the portion.

  As shown in FIG. 1, a large opening surface area is obtained by inclining the sound passage hole side opening 19 with respect to a surface (surface of the sound output portion 10a) orthogonal to the normal S of the speaker 10. Further, the sound passage hole 11 can also have a large opening surface area by being inclined with respect to a surface (surface of the sound output portion 10a) orthogonal to the normal line S of the speaker 10.

  A first elastic body 24 is disposed between the duct 12 and the sound passage hole side housing 7a, a second elastic body 25 is disposed between the duct 12 and the speaker 10, and the A third elastic body 26 is disposed between the speaker 10 and the outer casing 7b facing the voice passage hole casing 7a. The first, second, and third elastic bodies 24, 25, and 26 can be formed of sponge or rubber, and the first, second, and third can be formed by assembling the casing 7a and the casing 7b. At least one of the elastic bodies 24, 25, and 26 is compressed and deformed.

  4 is a plan view of a state in which the speaker 10 is attached to the duct 12. FIG. 5 is a rear view of the duct 12 in FIG. 4. The duct 12 has a support claw 27 for supporting the speaker 10. Further, a guide portion 30 for guiding the conducting wire 28 is provided at the top, and the conducting wire 29 is arranged in the outer space of the curved surface portions 21 and 23 of the duct 12, and the housing 7a is further provided. The projection 12 has a positioning hole 32 for positioning by fitting to the convex portion 31 (see FIGS. 6 to 8), and thus the duct 12 has a function as a bracket. As shown in FIGS. 4 and 5, the conductive wires 28 and 29 arranged along the duct 12 are integrated into the key-side housing 8 through the conductive hole 33 which is combined into one and constitutes the coupling portion 9 of FIGS. 6 to 8. It has come to be guided. 6 to 8, reference numeral 34 denotes a sub display unit that can be read from the outside of the outer casing 7b.

  Next, a procedure for assembling the above foldable mobile phone will be described.

  FIG. 6 shows a procedure for attaching the duct 12 to which the speaker 10 is attached and the conductors 28 and 29 to the housing 7a. First, the conducting wire 29 is arranged along a predetermined position of the housing 7 a, the contact 29 ′ at one end is connected to a predetermined portion of the housing 7 a shown in FIG. 8, and the other end is connected to the key housing 8 through the conducting wire hole 33. Lead to. Next, the duct 12 to which the speaker 10 is attached is inserted into the housing 7a and positioned so that the positioning hole 32 fits into the convex portion 31 of the housing 7a as shown in FIG. At this time, the above-mentioned conducting wire 29 is set along the outside of the curved surface portions 21 and 23 of the duct 12 as shown in FIG. Subsequently, the conductor 28 is arranged along the guide portion 30 of the duct 12 as shown in FIG. 8, the contact 28 'at one end is connected to a predetermined portion of the housing 7a, and the other end is connected to the key side through the conductor hole 33. Guide to housing 8.

  FIG. 7 shows the procedure for attaching the duct 12 to the housing 7a more specifically. First, a speaker is attached to the duct 12 via the second elastic body 25. Then, the duct 12 is attached to the housing 7 a via the first elastic body 24. At this time, since the duct 12 has a tapered shape toward the sound passage hole side opening 19, the duct 12 is easily positioned and attached to the sound passage hole side housing 7a. Can do.

  In the state of FIG. 8 in which the duct 12 is attached, the sound passage hole side casing 7a is connected to the key side casing 8 by the coupling portion 9, and the other ends of the conductors 28 and 29 are connected to the key side casing 8. Lead to the side.

  Next, when the third elastic body 26 of FIG. 7 is bonded to a position corresponding to the speaker 10 of the housing 7b, and then the housing 7b is assembled to the sound passage hole side housing 7a, FIGS. The folding cell phone is assembled.

  Next, the operation of the illustrated example will be described.

  When the foldable mobile phone is installed on a desk in a folded state as shown in FIG. 1, a space is formed between the overhanging portion 7a ′ of the housing 7a and the desk. Sound, ringtones, etc. can be heard outside, and when the display-side casing 7 is opened upward from the state of FIG. 1 as shown in FIG. The sound from the sound passage hole 11 can be heard in the same manner as the sound passage hole 11 faces upward.

  In the foldable mobile phone, since the sound of the speaker 10 is guided to the sound passage hole 11 through the duct 12, the distance between the sound output portion 10a of the speaker 10 and the sound passage hole 11 of the housing 7a is small. It can be easily applied to a distant layout.

  Further, in the above foldable mobile phone, in order to dispose the speaker 10 and the coupling portion 9 at the same side end portion of the display-side housing 7, the display-side coupling portion 9a is disposed below the speaker 10 as shown in FIG. Therefore, the sound passage hole 11 is arranged so as to be offset to the right side with respect to the speaker 10, and the duct 12 is connected to the display side so as to correspond to this arrangement. A curved surface portion 21 that is gently curved is formed so as to avoid the coupling portion 9a.

  Accordingly, the duct 12 has a shape in which the cross-sectional area is gradually reduced from the sound output side opening 18 toward the sound passage hole side opening 19 and the cross-sectional area is gradually reduced. The flow velocity of the sound wave in the vicinity of the passage hole side opening 19 is maintained high, and the sound wave is prevented from being disturbed, so that good sound pressure holding / transmitting performance is ensured.

  Further, as shown in FIG. 1, the duct 12 forms a curved surface portion 23 that is gently curved in the front-rear direction in order to avoid interference with the end portion of the key-side housing 8. The duct 12 has a cross-sectional area that gradually decreases from the sound output side opening 18 toward the sound passage hole side opening 19, so that the sound pressure holding and transmitting performance can be further improved.

  On the other hand, as shown in FIG. 1, the sound passage hole side opening 19 and the sound passage hole 11 are inclined with respect to a surface (surface of the sound output portion 10a) orthogonal to the normal S of the speaker 10 to increase the opening surface area. Therefore, the opening surface area becomes larger than the minimum cross-sectional area of the cross-sectional area of the duct 12 whose cross-sectional area gradually decreases toward the sound passage hole side opening 19 as described above. Can be improved.

  Further, a first elastic body 24 is provided between the duct 12 and the sound passage hole side housing 7 a, and a second elastic body 25 is provided between the duct 12 and the speaker 10. And the outer casing 7b facing the voice passage hole side casing 7a has a third elastic body 26, and the first, second and third elastic bodies 24, 25, 26 are provided. Is compressed and deformed by assembling the casing 7b and the sound passage hole side casing 7a, so that the positioning of the speaker 10 and the duct 12 in the thickness direction during assembly is facilitated, and the lateral The displacement of the direction can be prevented, and the number of steps such as screwing can be reduced or omitted, so that the assembling workability is greatly simplified.

  Further, since the sound output portion 10a of the speaker 10 and the sound passage hole 11 are securely adhered and sealed by the first, second, and third elastic bodies 24, 25, and 26, sound leakage due to the duct 12 is prevented. Can be prevented. Further, the elasticity of the first, second, and third elastic bodies 24, 25, and 26 can prevent chattering due to the resonance of the speaker 10, and can also absorb the impact when dropped.

  Further, as described above, the duct 12 has a tapered shape in which the cross-sectional area decreases toward the sound passage hole side opening 19, and as shown in FIG. The duct center line 20 is inclined in the left-right direction at an angle α with respect to the normal S of the speaker 10 as shown in FIG. Since it can respond easily to a case, it can be easily applied to various layouts in which the positions of the speaker 10 and the sound passage hole 11 are changed.

  The duct 12 has a function of a bracket for fixing the speaker 10 to the housing 7b. The duct 12 further includes a guide portion 30 for guiding the conductor 28, and further includes an outer periphery of the duct 12. Since the conducting wire is arranged between the housing and the casing, the portable terminal can be miniaturized by effectively using the duct 12 and the space.

  It should be noted that the present invention is not limited to the illustrated example described above, but can be applied to a portable terminal other than a folding cellular phone, the shape of a duct or the like is not limited to the illustrated example, and the present invention Of course, various changes can be made without departing from the scope of the present invention.

It is side sectional drawing of an example of the form which implements this invention. It is an II-II arrow equivalent view of FIG. It is a perspective view which shows the state which opened the portable terminal of FIG. It is a top view of the state which attached the speaker to the duct. It is a reverse view of the duct of FIG. It is explanatory drawing which shows the procedure which attaches the duct in which the speaker was attached, and conducting wire to a housing | casing. It is explanatory drawing which showed more specifically the procedure at the time of attaching a duct to a housing | casing. It is a top view of the housing | casing to which the duct was attached. It is a front view of a prior art example.

Explanation of symbols

7 Display-side housing 7a Housing 7b Housing 8 Key-side housing 9 Coupling portion 10 Speaker 10a Sound output portion 11 Sound passage hole 12 Duct 18 Sound portion opening 19 Sound passage hole side opening 20 Duct center line 21 Curved surface portion 22 duct center line 23 curved surface portion 24 first elastic body 25 second elastic body 26 third elastic body 28, 29 conducting wire 30 guide portion S normal line

Claims (15)

  There is a duct between the sound passage hole of the housing and the sound output portion of the speaker disposed in the housing, and the duct has a narrow cross-sectional area of the sound passage hole side opening relative to the cross-sectional area of the sound output portion side opening. A portable terminal characterized by that.   2. The mobile phone according to claim 1, wherein the duct has a cross-sectional area gradually decreasing from the sound output side opening toward the sound passage hole side opening, and at least one wall surface constituting the duct forms a curved surface part. Terminal.   The duct center line connecting the sound output side opening center and the sound passage hole side opening center of the duct is inclined with respect to the normal line of the speaker sound output part. Mobile device.   The at least one of the sound passage hole side opening of the duct and the sound passage hole is inclined with respect to a plane orthogonal to the normal line of the speaker. Mobile device.   The portable terminal according to any one of claims 1 to 4, wherein an opening surface area of the voice passage hole side opening is larger than a minimum sectional area of the sectional area of the duct.   The portable terminal according to claim 1, wherein the duct is a bracket that fixes the speaker to a housing.   The mobile terminal according to any one of claims 1 to 6, wherein the casing includes a curved surface portion corresponding to the curved surface portion of the duct.   The mobile terminal according to any one of claims 1 to 7, further comprising a coupling portion that couples the housing and the other housing outside the curved surface portion of the duct.   The portable terminal according to any one of claims 1 to 8, wherein a first elastic body is disposed between the duct and the sound passage hole side housing.   The portable terminal according to any one of claims 1 to 9, wherein a second elastic body is disposed between the duct and the speaker.   The mobile terminal according to any one of claims 1 to 10, wherein a third elastic body is disposed between the speaker and a housing facing the sound passage hole side housing.   The mobile terminal according to claim 1, wherein at least one of the first, second, and third elastic bodies is deformed.   The portable terminal according to claim 1, wherein the duct includes a guide portion that guides a conductive wire.   The portable terminal according to any one of claims 1 to 13, wherein a conducting wire is disposed in a space between the duct and the housing.   The portable terminal according to claim 1, wherein the conductive wire passes between the casing and the other casing through the coupling portion.

Images