JP2014209709A - Portable terminal holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable terminal holder which can ensure acoustic performance equivalent to conventional one while making more compact than conventional.SOLUTION: A portable terminal holder includes a resonance tube 30 where a reproduction sound from the speaker of a portable terminal 1 is enhanced at the resonant frequency, and a portable terminal holder body 11 provided in the resonance tube, and coupling the portable terminal and resonance tube while abutting the speaker and the inlet 31 of the resonance tube when mounting the portable terminal. The outlet 32 of the resonance tube is opened to the outside of the portable terminal holder body.

Description

  The present invention relates to a portable terminal holder as an accessory for a portable terminal that has an acoustic structure and amplifies reproduced sound emitted from a speaker unit of the portable terminal without using electric energy.

  In recent years, mobile terminals such as smartphones (mobile phones) and tablet terminals (information terminals) have been rapidly spread, and various accessories for mobile terminals have been provided accordingly. For example, when viewing a video downloaded from a video sharing site on a mobile terminal, the speaker unit built into the mobile terminal is very small in size, and the playback sound emitted from the speaker part of the mobile terminal may be small and difficult to hear. In addition, if the mobile device is placed flat on a desktop or the like, the screen of the mobile device may be difficult to see. However, this problem is solved and the playback sound emitted from the speaker of the mobile device becomes louder and easier to hear. In addition, a portable terminal holder that makes it easy to see the screen of the portable terminal has been proposed.

  This conventional portable terminal holder is placed on a horn as a sound structure that amplifies reproduced sound emitted from a speaker unit of a portable terminal without using electric energy, a tabletop, etc., and the portable terminal with respect to the mounting surface It is comprised from portable terminal holder main bodies, such as a holder and a stand which hold | maintain in the state which stood up and makes it easy to see the screen of a portable terminal. The horn is housed inside the portable terminal holder body, and the portable terminal holder body has a speaker portion of the portable terminal in order to efficiently put reproduced sound emitted from the speaker portion of the portable terminal into the horn when the portable terminal is mounted. The portable terminal and the horn are combined with the horn and the entrance of the horn facing each other. The role of the horn is to efficiently transmit the sound radiation from the speaker to the outside, and the horn has a divergent shape in which the cross-sectional area continuously increases from the entrance to the exit.

  Moreover, in this conventional portable terminal holder, directivity is generated by the horn, and the sound pressure in that direction is increased. Therefore, the outlet of the horn is open to the outside of the portable terminal holder body in the direction in which the screen of the portable terminal faces when the portable terminal is mounted, and the reproduction emitted from the speaker section regardless of the position of the speaker section. Sound can be emitted toward the user. Thereby, the reproduced sound emitted from the speaker unit of the portable terminal is further increased and is easy to hear.

  Examples of such conventional portable terminal holders include a “mobile phone horn” disclosed in Patent Document 1 and an “automobile portable terminal holder” disclosed in Patent Document 2. These horns and holders employ straight horns. Further, there are “sound dock for portable electronic device” disclosed in Patent Document 3 and “mobile terminal stand with sound amplification function” disclosed in Patent Document 4. In these docks and stands, an acoustic maze (labyrinth) type horn is adopted in which a straight type horn is folded and folded in the length direction. Furthermore, there are “speaker accessories for mobile terminals” disclosed in Patent Document 5 and “acoustic boxes for mobile phones” disclosed in Patent Document 6. In these accessories and acoustic boxes, a spiral horn obtained by spirally winding a straight horn in its length direction is employed.

Design Registration No. 1433941 Design Registration No. 1444564 US Pat. No. 8,320,597 Design Registration No. 1429383 JP 2007-110656 A JP 2005-184050 A

  In such a portable terminal holder, a compact size in which the place is not selected is preferable because of how it is used. The target size is such that the portable terminal holder can be placed and used if the target machine can be placed flat. This is because if the target device can be placed alone but cannot be placed by being mounted on the portable terminal holder, the convenience of the portable terminal is impaired by the portable terminal holder.

  Among the conventional portable terminal holders that house a horn as an acoustic structure that amplifies the reproduced sound emitted from the speaker portion of the portable terminal without using electric energy inside the portable terminal holder body, the overall size is the largest The reason why small and high acoustic performance can be obtained is that a spiral horn capable of forming the longest horn is adopted in the smallest space, referring to Patent Document 5, but the target machine is still a smartphone. The target size will be greatly exceeded.

  Such a portable terminal holder is required to be miniaturized, but a horn as an acoustic structure for amplifying reproduced sound emitted from a speaker portion of the portable terminal without using electric energy is provided inside the portable terminal holder body. When trying to further reduce the size of the conventional portable terminal holder to be accommodated, the length of the horn becomes short and the spread becomes small, so that there is a problem that the output sound pressure is lowered and the sound quality is deteriorated.

  Further, in Patent Document 6, the acoustic box is provided with a charging pin that can come into contact with a charging terminal of the portable terminal when the portable terminal is mounted, and also serves as a charger function. However, in a conventional portable terminal holder that houses a horn as an acoustic structure that amplifies reproduced sound emitted from the speaker unit of the portable terminal without using electric energy, inside the portable terminal holder body, Patent Documents 1 to 6, almost all of the internal space is occupied by the horn, and it is difficult to accommodate electronic / electrical components and the like that are electrically connected to the charging pins. Therefore, it is difficult to double as a charger function.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a portable terminal holder that can ensure acoustic performance equivalent to that of a conventional device while further reducing the size.

  The portable terminal holder of the present invention as a means for solving the above-mentioned problem is that a resonance tube is used as an acoustic structure that amplifies reproduced sound emitted from a speaker unit of a portable terminal that is a conventional horn without using electric energy. Adopted and realized by utilizing the audibility characteristics by optimizing the design of the resonance tube, ensuring the same acoustic performance as the conventional one while making it further smaller. Moreover, if the target machine is a smartphone, we are reducing the size that may be able to achieve the target size. It can also be used as a charging stand.

  Therefore, in the portable terminal holder of the present invention, if the reproduced sound emitted from the speaker unit of the portable terminal is put in the acoustic structure that amplifies reproduced sound emitted from the speaker unit of the portable terminal without using electric energy, A resonance tube that emphasizes the sound of the resonating frequency from the outlet, and the resonance tube is provided inside, and when the portable terminal is mounted, the speaker unit of the portable terminal and the inlet of the resonance tube are provided. A portable terminal holder main body that couples the portable terminal and the resonance tube in a butted state is provided, and an outlet of the resonance tube is open to the outside of the portable terminal holder main body.

  By adopting such a configuration, it is possible to efficiently put the reproduced sound emitted from the speaker unit of the portable terminal into the resonance tube when the portable terminal is mounted. In the resonance tube, the reproduction sound emitted from the speaker unit of the portable terminal enters, resonance (resonance) is generated in the tube, and the resonance frequency sound is emphasized (amplified) from the exit of the resonance tube. Therefore, the emphasized sound is easy to hear and can be heard loudly. That is, the reproduction sound emitted from the speaker unit of the mobile terminal becomes loud and easy to hear.

  Furthermore, in terms of human auditory characteristics, the sensitivity of bass is extremely poor, and the sensitivity of 2000 Hz to 5000 Hz is very good. For example, from the frequency characteristics of a general speaker unit built in a portable terminal (about 500 Hz). The reproduced sound can be heard from this frequency position.) By forming the resonance tube to resonate with a low sound, a low sound can be felt and the volume can be further increased. Moreover, the volume feeling can be further increased by forming a resonance tube that resonates with sound in a frequency band of about 2000 Hz to 5000 Hz. Therefore, the resonance tube is preferably formed so that the resonance frequency appears in the frequency band of about 500 Hz to 5000 Hz in order to use the auditory characteristics.

  In addition, the resonance tube has a normal type in which the cross-sectional area is constant and does not change from the inlet to the outlet, a tapered type in which the cross-sectional area does not change from the inlet to the outlet and does not change (continuously increases), Either can be used. Here, the horn also has a tip shape, but the horn and the tapered type resonance tube are completely different in principle.

  For the purpose of amplifying the sound of a specific frequency, the resonance tube is easier to design than the horn, and since the effect can be obtained with a smaller size, the overall size is further reduced from the conventional one. Can be Moreover, when the target machine is a smartphone, it is possible to achieve downsizing that may achieve the target size.

  In general, the main body size of a tablet terminal is about A4 to A5 size, while the main body size of a smartphone is about 60 mm to 70 mm in width and about 120 mm to 140 mm in height, compared to an A5 size tablet terminal. But it's pretty small. On the other hand, in the case of the resonance tube, the resonance frequency can be obtained by the sound speed: 340 m / second ÷ (4 × resonance tube length), and the length to obtain the resonance frequency in calculation is only ¼ of the sound speed. It will be. For example, the length of the resonance tube that resonates with a low sound of about 500 Hz is calculated to be about 170 mm, slightly exceeding the height of the smartphone, but by bending the resonance tube once, it will be less than the height of the smartphone with a margin. be able to. When the resonance tube is bent, the resonance effect may be weakened. However, if it is bent once, an effect that is almost the same as when it is not bent once can be obtained. Moreover, even if the resonance tube is a tapered type, it does not have a large spread like a horn. That is, in the case of the resonance tube, the effect can be obtained in a frequency band higher than about 500 Hz with a small size that can be accommodated within the plane area (width × height) of the smartphone.

  Moreover, as a portable terminal holder body, for example, it is placed on a desktop or the like in a home or office, or on a dashboard or the like in a car, and held in a state where the portable terminal is raised with respect to the mounting surface. A portable terminal holder such as a holder or a stand that makes it easy to see the screen of the mobile phone is adopted, and inside the portable terminal holder, a resonance tube is formed so that a resonance frequency appears in a frequency band of about 500 Hz to 5000 Hz. Even when the device and the resonance tube are combined, the overall size can be further reduced from the conventional one. Moreover, when the target machine is a smartphone, it is possible to achieve downsizing that may achieve the target size.

  In addition, the mobile terminal holder body is provided with a charging pin that can be contacted with the charging terminal of the mobile terminal when the mobile terminal is mounted, and the inside contains electronic and electrical components that electrically connect the charging pin. Even if it is designed to serve as a stand, the resonance tube can be accommodated in a surplus space inside the portable terminal holder body due to its small size, so that the portable terminal holder can also serve as a charging stand. it can. In other words, the charging stand can easily be equipped with an acoustic function that amplifies the reproduction sound emitted from the speaker unit of the mobile terminal without using electric energy, and it is also external to the existing charging stand. This is possible without having to change (design).

  Furthermore, when the mobile terminal is mounted, by directing the outlet of the resonance tube to the direction in which the screen of the mobile terminal faces, the reproduced sound emitted from the speaker part is directed to the user regardless of the position of the speaker part of the mobile terminal. It can be put out. Thereby, the reproduced sound emitted from the speaker unit of the portable terminal is further increased and is easy to hear.

  Moreover, the portable terminal holder of this invention WHEREIN: It is preferable that the said resonance tube has the horn part formed in the exit side. The sound (air vibration) radiation emphasized by the resonance tube can be efficiently transmitted to the outside. Thereby, the reproduced sound emitted from the speaker unit of the portable terminal is further increased and is easy to hear.

  Furthermore, in the portable terminal holder of the present invention, the portable terminal holder body includes a mounting surface for mounting the portable terminal, and a groove formed in the mounting surface, and the resonance tube includes the portable terminal. The portable terminal holder covering the groove so as to form the inlet and the outlet in cooperation with the groove of the terminal holder main body and the portable terminal holder main body and to open the inlet and the outlet to the outside It is also possible to configure using a cover attached to the mounting surface of the main body.

  According to the portable terminal holder of the present invention, it is possible to ensure acoustic performance equivalent to the conventional one while further reducing the size. Moreover, when the target machine is a smartphone, it is possible to achieve downsizing that may achieve the target size. It can also be used as a charging stand.

It is a figure which shows the portable terminal used as the object machine hold | maintained with the portable terminal holder as an attachment for portable terminals by the Example of this invention, Comprising: FIG. 1 (A) is the front view, FIG.1 (B) is FIG. It is a figure which shows the structure which looked at the portable terminal holder as an attachment for portable terminals by Example 1 of this invention from the side surface. It is a figure which shows the structure which looked at the portable terminal holder by Example 1 shown in FIG. 2 in the arrow X direction shown in the figure. It is a figure which shows the structure which looked at the portable terminal holder by Example 1 shown in FIG. 2 in the arrow Y direction shown in the figure. It is a figure which shows an internal structure in the state which cut | disconnected the portable terminal holder by Example 1 shown in FIG. 2 by the AA line shown in FIG. It is a figure which shows an internal structure in the state which cut | disconnected the portable terminal holder by Example 1 shown in FIG. 2 by the BB line shown in FIG. It is a perspective view which shows the external appearance of the resonance pipe (acoustic duct) which has in the portable terminal holder by Example 1 shown in FIG. It is a frequency characteristic comparison figure which shows the result of having measured the frequency characteristic of the portable terminal holder by Example 1 shown in FIG. 2, and the frequency characteristic of the portable terminal holder by a comparative example. FIGS. 9A and 9B are views showing first to third resonance tubes P1, P2, and P3, FIG. 9A is a perspective view showing an appearance of the first resonance tube P1, and FIG. 9B is a view of the second resonance tube P2. FIG. 9C is a perspective view showing the appearance of the third resonance tube P3. The result corresponding to the sound emitted from the speaker portion of the portable terminal shown in FIG. 1, and the sound emitted from the sound emission hole of the speaker portion of the portable terminal shown in FIG. 1 at the inlet 31a of the resonance tubes P0, P1, and P2 shown in FIG. Is a frequency characteristic comparison diagram showing respective results obtained by measuring the radiated sound from the outlet 32a with a microphone. FIG. 10 is a frequency characteristic comparison diagram showing the results of comparing the frequency characteristics of the first to third resonance tubes P1, P2, and P3 shown in FIG. 9 with the speaker unit 3 (without the resonance tube) of the mobile terminal 1 shown in FIG. . It is a frequency characteristic comparison figure which shows the analysis result of the simulation using the measurement result and the analysis model about the 1st resonance pipe P1 shown to FIG. 9 (A). It is a frequency characteristic comparison figure which shows the analysis result of the simulation using the measurement result and analysis model about the 2nd resonance pipe P2 shown in FIG.9 (B). It is a figure which shows 1st thru | or 5th analysis model C1, C2, C3, C4, C5, FIG. 14 (A) is a side view which shows 1st analysis model C1, FIG. 14 (B) is 2nd analysis model. FIG. 14C is a side view showing the third analysis model C3, FIG. 14D is a side view showing the fourth analysis model C4, and FIG. 14E is the fifth analysis. It is a side view showing model C5. FIG. 15 is a frequency characteristic comparison diagram showing analysis results of simulations using the first to fifth analysis models C1, C2, C3, C4, and C5 shown in FIG. It is a figure which shows the structure which looked at the portable terminal holder as an attachment for portable terminals by Example 2 of this invention from the side surface. It is a figure which shows the structure which looked at the portable terminal holder by Example 2 shown in FIG. 16 in the arrow X direction shown in the figure. It is a figure which shows the structure which looked at the portable terminal holder by Example 2 shown in FIG. 16 in the arrow Y direction shown in the figure. It is a figure which shows an internal structure in the state which cut | disconnected the portable terminal holder by Example 2 shown in FIG. 16 by the AA line shown in FIG. It is a figure which shows an internal structure in the state which cut | disconnected the portable terminal holder by Example 2 shown in FIG. 16 by the BB line shown in FIG. It is a perspective view which shows the external appearance of the resonance pipe (acoustic duct) which has in the portable terminal holder by Example 2 shown in FIG. It is a perspective view which shows the external appearance of the portable terminal holder as an attachment for portable terminals by Example 3 of this invention. It is a front view which shows the external appearance of the portable terminal holder by Example 3 shown in FIG. It is a figure which shows an internal structure in the state which cut | disconnected the portable terminal by Example 3 shown in FIG. 23 by the AA line shown in the figure.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing a portable terminal that is a target machine held by a portable terminal holder as an attachment for a portable terminal according to an embodiment of the present invention. FIG. 1 (A) is a front view thereof, FIG. B) is a rear view thereof. A portable terminal 1 shown in FIGS. 1A and 1B is a smartphone having a general size.

  As shown in FIG. 1A, a liquid crystal screen 2 that is a display unit that also serves as a touch operation unit is provided on the front side of the mobile terminal 1. Further, as shown in FIG. 1B, a sound emitting hole 4 of the speaker unit 3 is provided in the upper part on the back side of the mobile terminal 1. The speaker unit 3 includes a sound emitting hole 4, a cavity 5 that communicates with the sound emitting hole 4 and is formed inside the housing of the mobile terminal 1, and a speaker unit 6 that is accommodated in the cavity 5. In addition, a sound such as a ringtone or music reproduced by the speaker unit 6 is emitted from the sound emission hole 4. Further, as shown in FIG. 1B, a pair of charging terminals 7 are provided on the lower part on the back side of the mobile terminal 1.

  FIG. 2 is a diagram illustrating a configuration of a portable terminal holder as an attachment for a portable terminal according to the first embodiment of the present invention viewed from the side, and FIG. 3 illustrates the portable terminal holder according to the first embodiment shown in FIG. FIG. 4 is a diagram showing a configuration viewed in the direction of arrow X shown in FIG. 1, FIG. 4 is a diagram showing a configuration of the portable terminal holder according to Example 1 shown in FIG. 2 viewed in the direction of arrow Y, and FIG. The figure which shows an internal structure in the state which cut | disconnected the portable terminal holder by Example 1 shown in FIG. 2 by the AA line shown in FIG. 3, FIG. 6 shows the portable terminal holder by Example 1 shown in FIG. It is a figure which shows an internal structure in the state cut | disconnected by the BB line shown in FIG.

  For example, when viewing a video downloaded from a video sharing site or the like on the mobile terminal 1, if the mobile terminal 1 is simply placed flat on a desktop or the like, the liquid crystal screen 2 of the mobile terminal 1 is difficult to see, and the battery runs out during viewing. The speaker unit 6 built in the mobile terminal 1 is very small in size, and the reproduction sound emitted from the speaker unit 3 of the mobile terminal 1 is small and difficult to hear. The portable terminal holder 10 according to Example 1 is an attachment for the portable terminal 1 that is convenient to use.

  As shown in FIGS. 2 to 6, the portable terminal holder body 11 of the portable terminal holder 10 according to the first embodiment is placed on a placement surface G such as a tabletop, and the portable terminal 1 is placed on the placement surface G. It is held in an upright state and serves as a holder or a stand that makes it easy to see the liquid crystal screen 2 of the mobile terminal 1, and the horizontal width is the same as the height of the mobile terminal 1, and the vertical height is the horizontal width of the mobile terminal 1. A cradle 12 that is larger than the thickness of the portable terminal 1 and that has a thickness in the front-rear direction, and a triangular column or a quadrangular column laid sideways from the lower center of the back side of the cradle 12 And the base 13 is formed so that the bottom surface of the base 13 is in contact with the mounting surface G, so that the base 13 supports the base 12 from the back side, and the base 12 is supported on the mounting surface G. So that it can be stably placed on the mounting surface G in a state where it is inclined to the back side. You have me. In addition, on the front side of the cradle 12, there is a receiving recess 14 of the entire mobile terminal 1 and a pair of latching portions 15 formed to protrude inward from the front ends of the left and right inner wall surfaces of the receiving recess 14. Yes. In the portable terminal holder body 11 of the portable terminal holder 10 according to the first embodiment, the portable terminal 1 is placed in a predetermined lateral direction with the liquid crystal screen 2 of the portable terminal 1 in front (for charging the portable terminal 1 when the portable terminal 1 is mounted). The terminal 7 is in contact with a charging pin 17 described later, and the sound emitting hole 4 of the speaker unit 3 of the mobile terminal 1 faces the inlet 31 of the acoustic duct 30 described later on the same straight line. In the state where the upper end of the mobile terminal 1 is directed to the left and the lower end of the mobile terminal 1 is directed to the right.) After inserting one end in the longitudinal direction of the mobile terminal 1 under one of the latching portions 15, The other end of the terminal 1 in the longitudinal direction is pushed under the other latching portion 15, and the entire mobile terminal 1 is fitted and mounted in the receiving recess 14, so that the liquid crystal screen of the mobile terminal 1 is displayed on the front side of the cradle 12. 2 Inclined to the back side along the cradle 12 In an upright Te, so as to be capable of retaining the mobile terminal 1. The inclination angle θ of the cradle 12 is, for example, about 60 °. Further, the center of the upper side wall of the receiving recess 14 has a notch 16 that exposes the side surface of the mobile terminal 1 when the mobile terminal 1 is mounted. The portable terminal 1 can be taken out from the receiving recess 14 by placing a fingertip on the exposed side surface of the portable terminal 1.

  In addition, the portable terminal holder body 11 of the portable terminal holder 10 according to the first embodiment is provided with a charging pin 17 that can come into contact with the charging terminal 7 of the portable terminal 1 when the portable terminal 1 is mounted, and watching a moving image. The portable terminal 1 also serves as a charging stand, and the portable terminal holder body 11 of the portable terminal holder 10 according to the first embodiment has a pair of charging pins 17 and an AC adapter connector plug. A connector socket 18 for connecting the terminal 20 and a board 20 (PCB) for mounting other electronic / electrical components 19 and the like are accommodated, and a pair of charging pins 17 is a pair of the portable terminal 1 mounted in the receiving recess 14 in a normal orientation. Are disposed in the receiving recess 14 so as to be exposed from the bottom surface of the receiving recess 14 facing the charging terminal 7 (two locations at the right end when viewed from the front). Plug insertion port 18a of Tsu DOO 18 is disposed on one side of the base 13. When the mobile terminal 1 is mounted, the AC adapter connected to the power source is connected to the connector socket 18, so that the power source is supplied to the pair of charging terminals 7 of the mobile terminal 1 via the substrate (wiring) 20 and the pair of charging pins 17. The voltage can be supplied. The pair of charging pins 17 may be mounted on a dedicated board different from the board 20 on which the connector socket 18 is mounted, and connected to the board 20 on which the connector socket 18 is mounted using a cable. In addition, the charging pin 17 in the illustrated example is always elastically biased in the protruding direction, and the tip of the charging pin 17 is movable in accordance with the mounting / removal of the mobile terminal 1.

  The cradle 12 and the pedestal 13 constituting the outer shell of the mobile terminal holder body 11 of the mobile terminal holder 10 according to the first embodiment are integrally formed with the front plate and the peripheral side wall of the cradle 12 and opened to the back side. A rear case 22 integrally formed with the front case 21 and the entire base 13 and the back plate of the cradle 12 and opened to the front side, which is fixed to the front case 21 with screws or the like. It is configured. Each case 21 and 22 is formed of resin such as ABS. Moreover, each electronic / electrical component accommodated in the portable terminal holder main body 11 of the portable terminal holder 10 according to the first embodiment is attached to the front case 21 side. Specifically, the substrate 20 is fixed to the front case 21 with screws or the like along the inner surface of the receiving recess 14 of the front case 21. In addition, the front case 21 is provided with an inlet hole 23 and an outlet hole 25 for reproduced sound emitted from the speaker unit 3 of the mobile terminal 1. Specifically, the entrance hole 23 is located at one location on the bottom surface of the receiving recess 14 facing the sound emitting hole 4 of the speaker unit 3 of the mobile terminal 1 mounted in the receiving recess 14 in a normal orientation (from the front in the illustrated example). It is provided at one position on the left end when viewed. In addition, an annular packing 24 made of an elastic material such as rubber or silicon is stuck around the inlet hole 23. When the portable terminal 1 is mounted, the periphery of the sound emitting hole 4 of the speaker unit 3 of the portable terminal 1 is brought into close contact with the packing 24, so that the gap between the inlet hole 23 and the sound emitting hole 4 of the speaker unit 3 of the portable terminal 1 is removed. The sound leakage is prevented. On the other hand, in the lower part on the front side of the cradle 12, the receiving recess 14 is formed by being shifted to the upper part on the front side of the cradle 12, so that the opening surface of the receiving recess 14 is lower than the receiving recess 14. A sound emitting surface 26 is formed in the same plane as the liquid crystal screen 2 of the portable terminal 1 when the portable terminal 1 is mounted, and the outlet hole 25 has a horizontal width on the sound emitting surface 26. Widely formed. The sound emitting surface 26 may be provided with a cover for preventing intrusion of dust and the like from the outside through the outlet hole 25 inside the portable terminal holder body 11. Of course, the cover has sufficient air permeability and does not inhibit sound emission from the outlet hole 25 to the outside of the portable terminal holder body 11.

  The portable terminal holder 10 according to the first embodiment is provided inside the portable terminal holder body 11 and includes an inlet 31 connected to the inlet hole 23 and an outlet 32 connected to the outlet hole 25. And an acoustic duct 30 for restricting the path of propagation of the reproduced sound radiated from the inside to the outlet hole 25. When the portable terminal 1 is mounted, the outlet 32 of the acoustic duct 30 is provided in the direction in which the liquid crystal screen 2 of the portable terminal 1 faces. Regardless of the position of the speaker unit 3 of the mobile terminal 1 (in the illustrated example, the back side of the mobile terminal 1 opposite to the user side), the reproduced sound emitted from the speaker unit 3 is emitted toward the user side. Be able to. In addition, when the mobile terminal 1 is mounted, the sound emission hole 4 of the speaker unit 3 of the mobile terminal 1 faces the mobile terminal holder body 11, so that the reproduction sound pressure may be reduced due to interference with the reflected sound. can avoid. Thereby, the reproduction sound emitted from the speaker unit 3 of the mobile terminal 1 becomes loud and easy to hear. FIG. 7 is a perspective view showing the external appearance of an acoustic duct (resonance tube) included in the portable terminal holder 10 according to the first embodiment.

  Inside the portable terminal holder main body 11, the acoustic duct 30 has a shape (path) that avoids all electronic / electrical components including the connector socket 18 and the substrate 20 provided therewith, and from the speaker unit 3 of the portable terminal 1. The reproduced sound to be emitted is propagated from the inlet hole 23 to the outlet hole 25. In the acoustic duct 30, the receiving concave portion 14 is directed toward the right side from the inlet 31 (inlet hole 23) positioned at the left end of the receiving concave portion 14 when viewed from the front. A linear portion that extends horizontally to the center of the receiving recess 14 and a curved portion that extends in a U shape along the inner surface of the pedestal 13 as viewed from the side from the center of the receiving recess 14. In this shape, the speaker portion 3 of the portable terminal 1 is avoided by avoiding all electronic / electrical components including the connector socket 18 and the substrate 20 in this shape. Path to propagate is formed Luo the emitted reproduced sound from the inlet hole 23 to the outlet hole 25.

  The acoustic duct 30 provided inside the portable terminal holder main body 11 of the portable terminal holder 10 according to the first embodiment is also attached to the front case 21 side in the same manner as each electronic / electrical part. As shown in FIG. 7, the acoustic duct 30 is formed with a plurality of boss portions 33 for screwing, for example. The acoustic duct 30 is made of a resin such as ABS.

  When assembling the portable terminal holder 10 according to the first embodiment, it is completed by fixing the front case 21 to the front case 21 in the order of the board 20, the acoustic duct 30, and the rear case 22 with screws or the like.

  By the way, the portable terminal holder 10 according to the first embodiment is emitted from the speaker unit 3 of the portable terminal 1 as an acoustic structure that amplifies the reproduced sound emitted from the speaker unit 3 of the portable terminal 1 without using electric energy. If a reproduced sound is input, a resonance pipe that emphasizes and resonates the sound of the resonating frequency is provided from the outlet 32, and the above-described acoustic duct 30 is the resonance pipe. That's it.

  As shown in FIGS. 2 to 7, in the resonance tube 30 included in the portable terminal holder 10 according to the first embodiment, the resonance tube 30 extends in the U-shape toward the outlet 32 side, specifically, along the inner surface of the base 13. In the curved portion, a horn portion 30B having a widening shape whose cross-sectional area continuously increases as it goes forward is formed, and the straight portion extending from the inlet 31 becomes the original resonance tube portion 30A. The inlet 31 is provided open to the front side on the tube side wall near the closed end of the resonance tube 30A. In the illustrated example, the resonance tube portion 30A is a normal type in which the cross-sectional area is constant and does not change from the inlet 31 to the outlet 32A, but the cross-sectional area does not change from the inlet 31 to the outlet 32A and changes (continuously large). It may be a taper type with a taper shape. A curved portion extending in a U shape along the inner surface of the pedestal 13 can also be used as the resonance tube portion 30A. That is, the resonance tube 30 can be configured by only the resonance tube portion 30A.

  On the other hand, the portable terminal holder 10 according to the first embodiment is provided with the resonance tube 30 inside, and when the portable terminal 1 is mounted, the portable terminal holder 10 is in a state where the speaker unit 3 of the portable terminal 1 and the inlet 31 of the resonance tube 30 face each other. The portable terminal holding body 11 is provided as a portable terminal holding structure for connecting the terminal 1 and the resonance tube 30, and the outlet 32 of the resonance tube 30 is opened to the outside.

  Thus, in the portable terminal holder 10 according to the first embodiment having the resonance tube 30 and the portable terminal holder main body 11, when the portable terminal 1 is mounted, the reproduced sound emitted from the speaker unit 3 of the portable terminal 1 is resonated. 30 can be put efficiently. Then, in the resonance tube portion 30A of the resonance tube 30, the reproduced sound emitted from the speaker portion 3 of the portable terminal 1 enters it, resonance (resonance) occurs in the tube, and the sound having a frequency that resonates from the outlet 32 of the resonance tube 30. Is emphasized (amplified), making the emphasized sound easier to hear and louder. That is, the reproduction sound emitted from the speaker unit 3 of the mobile terminal 1 becomes loud and easy to hear. In the resonance tube 30, a horn portion 30 </ b> B is formed on the outlet 32 side, and sound (air vibration) emphasized by the resonance tube portion 30 </ b> A of the resonance tube 30 can be efficiently transmitted to the outside. As a result, the reproduced sound emitted from the speaker unit 3 of the portable terminal 1 becomes louder and easier to hear.

  Further, the resonance tube portion 30A of the resonance tube 30 is formed so that a resonance frequency appears in a frequency band of about 500 Hz to 5000 Hz. In terms of human auditory characteristics, the sensitivity of bass is extremely poor, and the sensitivity of 2000 Hz to 5000 Hz is very good. For example, about 500 Hz (from the frequency characteristics of a general speaker unit built in a portable terminal, Reproduction sound is heard from the frequency position.) By forming the resonance tube 30A of the resonance tube 30 that resonates with a low sound, a low sound can be felt and a volume feeling can be further increased. Further, by forming the resonance tube 30A of the resonance tube 30 that resonates with sound in a frequency band of about 2000 Hz to 5000 Hz, the volume feeling can be further increased.

  Further, in the case of the resonance tube portion 30A of the resonance tube 30, the resonance frequency can be obtained by sound velocity: 340 m / second ÷ (4 × resonance tube length), for example, a resonance tube that resonates with a low sound of about 500 Hz. The length is about 170 mm in calculation and slightly exceeds the height of the portable terminal 1 (about 120 mm to 140 mm), but the bending of the resonance tube portion 30A of the resonance tube 30 once allows the portable terminal 1 to have a sufficient height. Can be less. When the resonance tube 30A of the resonance tube 30 is bent, the resonance effect may be reduced. However, if it is bent once, an effect that is almost the same as when it is not bent once can be obtained. Moreover, the resonance tube portion 30A of the resonance tube 30 does not have a large spread like the horn portion 30B even if it is a tapered type. That is, in the case of the resonance tube 30, the effect can be obtained in a frequency band higher than about 500 Hz with a small size that fits within the plane area (horizontal width × height) of the mobile terminal 1.

  2 to 4, the overall size of the portable terminal holder 10 according to the first embodiment is such that the horizontal width is approximately the same as the height of the mobile terminal 1 and the depth in the front-rear direction is approximately the same as the horizontal width of the mobile terminal 1. A size that allows the portable terminal holder 10 according to the first embodiment to be placed and used in a place where the terminal 1 can be placed flat, that is, a target size of the portable terminal holder 10 according to the first embodiment is generally achieved. Moreover, although the portable terminal holder main body 11 of the portable terminal holder 10 according to the first embodiment also serves as a holder, a stand, and further a charging stand, the target size of the portable terminal holder 10 according to the first embodiment is nevertheless. Is almost achieved.

  According to the portable terminal holder 10 according to the first embodiment, it is possible to ensure the same acoustic performance as the conventional one while further reducing the size. Moreover, the target size is almost achieved when the target machine is a smartphone.

  Moreover, the acoustic performance of the portable terminal holder 10 according to the first embodiment is confirmed by actual measurement. FIG. 8 is a frequency characteristic comparison diagram showing measurement results of the portable terminal holder 10 according to the first embodiment shown in FIG. 2 and the portable terminal holder according to the comparative example (measurement conditions: in an acoustic box / front of the portable terminal 1). 200 mm) (measurement signal: white noise). The portable terminal holder according to the comparative example includes a portable terminal holder having the same structure as the portable terminal holder 10 according to the first embodiment, except that the inlet hole 23, the packing 24, the outlet hole 25, and the resonance tube 30 are not provided. Using. 8, the portable terminal holder 10 according to Example 1 can confirm an increase in sound pressure of 20 dB near 2000 Hz as compared with the portable terminal holder according to the comparative example. FIG. 8 also shows an analysis result by (computer) simulation of the resonance tube 30 alone using the analysis model of the resonance tube 30 shown in FIG. Similar to the measurement result, an increase in sound pressure of 20 dB can be confirmed around 2000 Hz.

  Further, in the resonance tube 30 included in the portable terminal holder 10 according to the first embodiment, it is possible to control the resonance frequency to appear in a specific frequency band by changing the shape of the resonance tube P0, This is confirmed by actual measurement using P1 and P2 and simulation using five types of analysis models.

  FIG. 9 is a view showing the first to third resonance tubes P1, P2, and P3. FIG. 9A is a perspective view showing the appearance of the first resonance tube P1, and FIG. FIG. 9C is a perspective view showing the appearance of the third resonance tube P3. FIG. 9C is a perspective view showing the appearance of the resonance tube P2. As shown in FIGS. 9A, 9B, and 9C, the first to third resonance tubes P1, P2, and P3 correspond to the inlet 31a and the outlet hole 25 corresponding to the inlet hole 23, respectively. The first resonance tube portion of the first resonance tube P1 shown in FIG. 9A is composed of first to third resonance tube portions 30a, 30b, and 30c having only different lengths. 30a, the resonance tube portion 30c of the third resonance tube P3 shown in FIG. 9C, and the second resonance tube portion 30b of the second resonance tube P2 shown in FIG.

  FIG. 10 shows the result corresponding to the sound emitted from the speaker unit 3 of the portable terminal 1 shown in FIG. 1 (without the resonance tube) and the inlets 31a of the first to third resonance tubes P1, P2, and P3 shown in FIG. FIG. 1 is a frequency characteristic comparison diagram showing respective results obtained by inputting the radiated sound from the sound emitting hole 4 of the speaker unit 3 of the portable terminal 1 shown in FIG. 1 (white circles) and measuring the radiated sound from the outlet 32a with a microphone. It is. In FIG. 10, a change is seen in the second peak appearing in the frequency band of 2000 Hz to 5000 Hz due to the first resonance tubes P1, P2, and P3. Specifically, the length of the resonance tube (resonance tube) from the inlet 31a to the outlet 32a is around 4000 Hz in the first resonance tube P1, around 2800 Hz in the third resonance tube P3, around 2300 Hz in the second resonance tube P2. It can be confirmed that the second peak position is shifted to the low band as the value becomes longer.

  FIG. 11 is a frequency characteristic showing the result of comparing the frequency characteristics of the first to third resonance tubes P1, P2, and P3 shown in FIG. 9 with the speaker unit 3 (without the resonance tube) of the mobile terminal 1 shown in FIG. FIG. From FIG. 11, it can be confirmed that the sound pressure increases in a specific frequency band due to the resonance effect of the first to third resonance tubes P1, P2, and P3.

  FIG. 12 is a frequency characteristic comparison diagram showing the measurement result and the analysis result of the simulation using the analysis model for the first resonance tube P1 shown in FIG. 9 (A). FIG. 13 is a frequency characteristic comparison diagram showing the measurement results and the analysis results of the simulation using the analysis model for the second resonance tube P2 shown in FIG. 9B. From FIG. 12 and FIG. 13, the measurement results of the first and second resonance tubes P1 and P2 and the analysis results are almost the same, and simulation of the measured characteristics of the first to third resonance tubes P1, P2 and P3 is possible with high accuracy. It can be confirmed.

  FIG. 14 is a diagram showing the first to fifth analysis models C1, C2, C3, C4, and C5. FIG. 14A is a side view showing the first analysis model C1, and FIG. 14C is a side view showing the third analysis model C3, FIG. 14D is a side view showing the fourth analysis model C4, and FIG. 14E is a side view showing the second analysis model C2. FIG. 10 is a side view showing a fifth analysis model C5. As shown in FIG. 14A, the first analysis model C1 is an analysis model of a resonance tube composed of only a normal type resonance tube portion 30d. As shown in FIG. 14 (B), the second analysis model C2 is a horn portion having a flared shape in which the cross-sectional area continuously increases toward the outlet side of the resonance tube portion 30d of the first analysis model C1. The resonance tube analysis model 30f is formed on the inlet side, and has a resonance tube portion 30e in which the length of the resonance tube portion 30d of the first analysis model C1 is shortened (resonance tube portion 30e +). Horn part 30f). As shown in FIG. 14C, the third analysis model C3 is a resonance tube analysis model in which the horn portion 30f of the second analysis model C2 is enlarged. A horn portion 30g having a larger spread than the horn portion 30f is formed, and a resonance tube portion 30e is provided on the inlet side (resonance tube portion 30e + horn portion 30g). As shown in FIG. 14D, the fourth analysis model C4 is a resonance tube analysis model in which the normal type resonance tube portion 30d of the first analysis model C1 is tapered. A horn part 30i having the same extent as the horn part 30f of the second analysis model C2 is formed on the outlet side with the outlet of the resonance pipe part 30h as the inlet (resonance tube 30h). Part 30h + horn part 30i). As shown in FIG. 14E, the fifth analysis model C5 is a resonance tube analysis model in which the length of the resonance tube portion 30d of the first analysis model C1 is increased. And a resonance tube portion 30d that is enlarged by extending the length of the resonance tube portion 30e to the same length as the resonance tube portion 30d, that is, the resonance tube portion 30d (resonance tube portion 30d + horn). Part 30f). 14A corresponds to the resonance tube portion 30a shown in FIG. 9, and FIG. 14B corresponds to the resonance tube 30 shown in FIG.

  FIG. 15 is a frequency characteristic comparison diagram showing analysis results of simulations using the first to fifth analysis models C1, C2, C3, C4, and C5 shown in FIG. From FIG. 15, in comparison with the overall length fixing and presence / absence of the horn portion (the length of the resonance tube portion is shortened), that is, FIG. 14B shows the first analysis model C1 shown in FIG. In the second analysis model C2 shown in FIG. 2, the resonance frequency is shifted to a high range. Further, in the comparison by fixing the entire length and changing the spread of the horn part, that is, the third analysis model C3 shown in FIG. 14C is near 2000 Hz with respect to the second analysis model C2 shown in FIG. There is a change in the first resonance frequency. Further, the comparison with the overall length fixing and the presence / absence of the taper of the resonance tube portion, that is, the fourth analysis model C4 shown in FIG. 14D is different from the second analysis model C2 shown in FIG. The position of has changed. Further, in the comparison by the change in the overall length (the length of the resonance tube portion becomes longer), that is, the resonance frequency is higher in FIG. 14E than in the second analysis model C2 shown in FIG. 14B. It has shifted to the area.

  From FIG. 9 to FIG. 15, it was confirmed that the resonance frequency of the resonance tube 30 included in the portable terminal holder 10 according to the first embodiment was changed due to the shape change. Then, it was confirmed that it is possible to control the resonance frequency to appear in a specific frequency band by changing the length and the inclination.

  16 is a diagram showing a configuration of a portable terminal holder as an attachment for a portable terminal according to a second embodiment of the present invention as viewed from the side, and FIG. 17 is a diagram showing the portable terminal holder according to the second embodiment shown in FIG. FIG. 18 is a diagram showing a configuration seen in the direction of arrow X shown in FIG. 16, FIG. 18 is a diagram showing a configuration seen in the direction of arrow Y shown in FIG. The figure which shows an internal structure in the state which cut | disconnected the portable terminal holder by Example 2 shown in FIG. 16 by the AA line shown in FIG. 17, FIG. 20 shows the portable terminal holder by Example 2 shown in FIG. It is a figure which shows an internal structure in the state cut | disconnected by the BB line shown in FIG. In addition, in the portable terminal holder by Example 2, the same structure as the portable terminal holder by Example 1 is attached | subjected the same code | symbol, detailed description is abbreviate | omitted, and a different structure is demonstrated below.

  In the portable terminal holder body 11 of the portable terminal holder 10 according to the first embodiment, a receiving recess 14 for the entire portable terminal 1 is formed on the front side of the cradle 12, and the entire portable terminal 1 is formed in the receiving recess 14. By fitting and mounting, the portable terminal 1 can be held on the front side of the cradle 12 with the liquid crystal screen 2 of the portable terminal 1 tilted to the back side along the cradle 12. On the other hand, the portable terminal holder body 41 of the portable terminal holder 40 according to the second embodiment has a receiving recess for the entire portable terminal 1 on the front side of the cradle 42 as shown in FIGS. 14 is not formed, and the cradle 42 is formed so that the entire front surface thereof is located in the same plane. In addition, on the front side of the pedestal 42, a pair of left and right pocket-shaped receptacles that open inward and inward, instead of the receiving recess 14 and the pair of left and right latching portions 15 of the entire mobile terminal 1. The portions 43 and 44 are formed to protrude. In the portable terminal holder main body 41 of the portable terminal holder 40 according to the second embodiment, the liquid crystal screen 2 of the portable terminal 1 faces the front, the portable terminal 1 is in a normal lateral state, and one end lower corner portion in the longitudinal direction of the portable terminal 1. Is inserted into one receiving portion 43 from above, and the other lower corner of the other end in the longitudinal direction of the mobile terminal 1 is inserted into the other receiving portion 43 from above, so that the mobile terminal 1 The portable terminal 1 can be held in a state where the liquid crystal screen 2 is tilted to the back side along the cradle 12.

  Moreover, in the portable terminal holder main body 41 of the portable terminal holder 40 according to the second embodiment, the pair of charging pins 17 are a pair of charging terminals of the portable terminal 1 that are attached to the front side of the cradle 42 in a regular orientation. 7 and exposed at two locations on the front side above the pair of left and right receiving portions 43, 44 of the receiving table 42 facing to 7 (in the illustrated example, two locations on the right end when viewed from the front). In addition, each electric / electronic component accommodated inside the portable terminal holder body 41 of the portable terminal holder 40 according to the second embodiment, a plug insertion port of a connector socket arranged on one side of the pedestal 13, and the like are illustrated. Is omitted.

  Moreover, in the portable terminal holder main body 41 of the portable terminal holder 40 according to the second embodiment, the pedestal 42 and the pedestal 13 constituting the outer shell are integrally formed with the flat front plate and the peripheral side wall of the pedestal 42. The front case 51 is open to the rear side, and the rear case 22 is configured. The entrance hole 23 is a front surface above the pair of left and right receiving portions 43 and 44 of the front case 51 facing the sound emitting hole 4 of the speaker portion 3 of the mobile terminal 1 mounted in a regular orientation on the front side of the cradle 42. It is provided at one place (in the figure, one place at the left end when viewed from the front). The exit hole 25 is a front surface below the pair of left and right receiving portions 43 and 44 of the front case 51, and is located in the same plane as the front surface above the pair of left and right receiving portions 43 and 44 of the front case 51. 56.

  Further, the portable terminal holder 40 according to the second embodiment includes an inlet 61 connected to the inlet hole 23 and an outlet 62 connected to the outlet hole 25, which is provided inside the portable terminal holder body 41. A resonance tube (acoustic duct) 60 that restricts a path for propagating reproduced sound radiated from the inside to the exit hole 25, and when the mobile terminal 1 is mounted, the resonance tube 60 faces in a direction in which the liquid crystal screen 2 of the mobile terminal 1 faces. The outlet 62 is directed. FIG. 21 is a perspective view showing the appearance of a resonance tube (acoustic duct) included in the portable terminal holder 40 according to the second embodiment.

  Inside the portable terminal holder main body 41, the resonance tube 60 has a shape (path) that avoids all electronic and electrical components including a connector socket and a board (not shown) accommodated together with the speaker tube 3 of the portable terminal 1. In the resonance tube 60, the front plate of the cradle 42 is viewed from the inlet 61 (entrance hole 23) located at the left end of the cradle 42 as viewed from the front. A first straight portion extending horizontally to the center of the cradle 42 along the inner surface of the cradle 42 and the inner surface of the front plate of the cradle 42 on the same plane as the first straight portion from the center of the cradle 42 The second straight portion extending downward is L-shaped to reach the outlet 62 (exit hole 25) located at the lower front side of the cradle 42. With this shape, all connector sockets and boards (not shown) are included. Electronic Avoiding gas components, the path for propagating the reproduced sound emitted from the speaker unit 3 of the portable terminal 1 from the inlet port 23 to outlet hole 25 is formed.

  The resonance tube 60 provided inside the portable terminal holder main body 41 of the portable terminal holder 40 according to the second embodiment is also attached to the front case 51 side in the same manner as each electronic / electrical component (not shown). The resonance tube 60 is formed with a plurality of bosses for screwing, for example, but is not shown.

  Incidentally, the portable terminal holder 40 according to the second embodiment is also emitted from the speaker unit 3 of the portable terminal 1 as an acoustic structure that amplifies the reproduced sound emitted from the speaker unit 3 of the portable terminal 1 without using electric energy. When the reproduced sound is input, a resonance tube is generated from the outlet 62 with the resonance frequency being emphasized, and the above-described resonance tube (acoustic duct) 60 is the resonance tube.

  As shown in FIGS. 16 to 21, also in the resonance tube 60 included in the portable terminal holder 40 according to the second embodiment, on the outlet 62 side, specifically, from the center portion of the cradle 42 to the same as the first straight portion. A horn portion 60B having a flared shape whose cross-sectional area continuously increases as it goes forward is formed in the second linear portion that extends downward along the inner surface of the front plate of the cradle 42 on a plane. The first straight line portion extending horizontally from 61 to the center of the cradle 42 toward the right side along the inner surface of the front plate of the cradle 42 is the original resonance tube portion 60A. The inlet 61 is provided open to the front side on the tube side wall near the closed end of the resonance tube 60A. In the illustrated example, the resonance tube portion 60A is a normal type whose cross-sectional area is constant and does not change from the inlet 61 to the outlet 62A. However, the cross-sectional area is not constant from the inlet 61 to the outlet 62A and changes (continuously increases). It may be a taper type with a taper shape. In addition, the second straight line portion extending downward along the inner surface of the front plate of the cradle 42 on the same plane as the first straight line portion from the center portion of the cradle 42 can also be used as the resonance tube portion 60A. That is, the resonance tube 60 can be configured by only the resonance tube portion 60A.

  On the other hand, the portable terminal holder 40 according to the second embodiment is provided with the resonance tube 60 inside, and when the portable terminal 1 is attached, the portable terminal holder 40 is in a state where the speaker unit 3 of the portable terminal 1 and the inlet 61 of the resonance tube 60 face each other. A portable terminal holding body 41 is provided as a portable terminal holding structure for connecting the terminal 1 and the resonance tube 60, and an outlet 62 of the resonance tube 60 is opened to the outside.

  Thus, in the portable terminal holder 40 according to the second embodiment having the resonance tube 60 and the portable terminal holder body 41, the portable terminal holder 10 according to the first embodiment having the resonance tube 30 and the portable terminal holder body 11. The same acoustic effect can be obtained.

  22 is a perspective view showing the appearance of a portable terminal holder as an attachment for a portable terminal according to Embodiment 3 of the present invention. FIG. 23 is a partial view of the appearance of the portable terminal holder according to Embodiment 3 shown in FIG. FIG. 24 is a diagram showing the internal structure of the portable terminal according to the third embodiment shown in FIG. 23 taken along the line AA shown in FIG. In addition, in the portable terminal holder by Example 3, the same structure as the portable terminal holder by Example 1 is attached | subjected the same code | symbol, detailed description is abbreviate | omitted, and a different structure is demonstrated below.

  The resonance tube of the portable terminal holder 10 according to the first embodiment is a resonance tube (acoustic duct) 30 configured separately from the portable terminal holder main body 11, whereas the portable terminal holder according to the third embodiment. As shown in FIGS. 22 to 24, the resonance tube 70 is a resonance tube (acoustic duct) 80 configured by using a part of the portable terminal holder main body 71.

  In the mobile terminal holder main body 71 of the mobile terminal holder 70 according to the third embodiment, the receiving recess 14 and the sound emitting surface 76 of the entire mobile terminal 1 are formed on the front side of the cradle 72 of the mobile terminal holder main body 71. Yes. Further, in the front side of the cradle 72 of the portable terminal holder main body 71, the first groove 77 and the second groove 77 are formed on the bottom surface 73 and the lower side wall surface 74 of the receiving recess 14 which is a mounting surface for mounting the mobile terminal 1. A groove formed by the groove 78 is provided. The 1st groove | channel 77 is provided in the bottom face 73 of the receiving recessed part 14, and is formed in the concave shape opened to the front side. The second groove 78 is provided in the lower side wall surface 74 of the receiving recess 14 and is formed in a concave shape that opens upward. The second groove 78 is further formed to be continuous with the first groove 77 on the bottom surface 73 side of the receiving recess 14 and to have a notch 79 at the center of the sound emitting surface 76. The second groove 78 is exposed to the outside on the front side by the notch 79.

  In addition, an entrance hole 23 is provided on the front side of the cradle 72 of the portable terminal holder main body 71. The entrance hole 23 is provided at one end of the first groove 77 and is opposed to the sound emission hole 4 of the speaker unit 3 of the portable terminal 1 that is mounted on the mounting surface in a normal orientation on the front side of the cradle 72. It is arranged at one location (one location near the right end when viewed from the front in the example) on the front side of the table 72 (the bottom surface 73 of the receiving recess 14). In addition, you may provide packing around the opening surface of the entrance hole 23, etc. for sealing between the portable terminal holder main body 71 and the portable terminal 1 at the time of the portable terminal 1 mounting | wearing.

  Further, the portable terminal holder 70 according to the third embodiment is provided in the portable terminal holder main body 71 and has an inlet 81 connected to the inlet hole 23 and an outlet 82, and reproduced sound radiated from the inlet 81 to the inside. Is provided with a resonance tube (acoustic duct) 80 that restricts the path of propagation to the outlet 82, and when the portable terminal 1 is mounted, the outlet 82 of the resonance tube 80 faces the direction in which the liquid crystal screen 2 of the portable terminal 1 faces. The resonance tube 80 is configured by using a portable terminal holder main body 71 and a cover 85, and is formed by attaching the cover 85 to a pedestal 72 of the portable terminal holder main body 71.

  The cover 85 cooperates with the first groove 77 and the second groove 78 to form the inlet 81 and the outlet 82 and covers the first groove 77 and the second groove 78 so as to open the inlet 81 and the outlet 82 to the outside. Are attached to the bottom surface 73 and the lower side wall surface 74 of the receiving recess 14. The cover 85 is made of resin or the like, and is formed in a film shape, a sheet shape, or a plate shape. The cover 85 includes a first cover portion that is airtightly attached to the bottom surface 73 of the receiving recess 14 and a second cover portion that is airtightly attached to the lower side wall surface 74 of the receiving recess 14 and is L-shaped. It is said that. The illustrated cover 85 is in the form of a film and the peripheral portions of the first cover portion and the second cover portion are installed on the bottom surface 73 and the lower side wall surface 74 of the receiving recess 14 respectively. A step portion is formed at the peripheral edge of the opening of the two grooves 78, and the first cover portion and the second cover portion are positioned on the same plane as the bottom surface 73 and the lower side wall surface 74 of the receiving recess 14 respectively. You may install the peripheral part of a cover part and a 2nd cover part in this step part. Further, the cover 85 of the illustrated example is configured by integrally connecting the first cover portion and the second cover portion. However, the cover 85 may be configured by a separate first cover portion and second cover portion. Good.

  The resonance tube 80 propagates reproduced sound emitted from the speaker unit 3 of the mobile terminal 1 from the inlet 81 to the outlet 82 through the inside of the first groove 77 and the second groove 78 covered by the cover 85. In the resonance tube 80, a first straight portion extending substantially horizontally from the inlet 81 (entrance hole 23) located near the right end of the cradle 72 when viewed from the front toward the left side toward the center of the receiving recess 14, and the cradle. 72, a second linear portion extending downward from the center of the first linear portion on the same plane as the first linear portion, and a third linear portion extending forward from the lower portion of the cradle 72 to the lower part on the front side of the cradle 72 A bent shape reaching the outlet 82 is formed, and in this shape, a path through which reproduced sound emitted from the speaker unit 3 of the mobile terminal 1 is propagated from the inlet 81 to the outlet 82 is formed.

  Incidentally, the portable terminal holder 70 according to the third embodiment is also emitted from the speaker unit 3 of the portable terminal 1 as an acoustic structure that amplifies the reproduced sound emitted from the speaker unit 3 of the portable terminal 1 without using electric energy. If a reproduced sound is input, a resonance tube is generated from the outlet 82 with the sound of the resonating frequency being emphasized, and the above-described resonance tube (acoustic duct) 80 is the resonance tube.

  As shown in FIGS. 22 to 24, also in the resonance tube 80 included in the portable terminal holder 70 according to the third embodiment, the outlet 82 side, specifically, the same as the first straight portion from the central portion of the cradle 42. On the second straight line portion extending downward on the plane, a horn portion 80B having a flared shape whose cross-sectional area continuously increases as it goes forward is formed at the center of the receiving concave portion 14 from the inlet 81 toward the left side. The first straight line portion extending substantially horizontally to the portion is the original resonance tube portion 80A. The outlet 82 communicates with the horn portion 80B through an open portion 80C formed in the third straight portion so as to have substantially the same lateral width as the widened end portion of the horn portion 80B. The resonance tube portion 80A in the figure is a normal type in which the cross-sectional area is constant and does not change from the inlet 81 to the outlet 82A of the resonance tube portion 80A, but the cross-sectional area does not change from the inlet 81 to the outlet 82A. It may be a taper type with a flared shape (which increases continuously). Further, the second straight portion and the third straight portion can also be the resonance tube portion 80A. That is, the resonance tube 80 can be configured by only the resonance tube portion 80A.

  On the other hand, the portable terminal holder 70 according to the third embodiment is provided with the resonance tube 80, and when the portable terminal 1 is mounted, the portable terminal 1 is in a state where the speaker unit 3 of the portable terminal 1 and the inlet 81 of the resonance tube 80 face each other. A portable terminal holding body 71 is provided as a portable terminal holding structure that couples the resonance tube 80 and the outlet 82 of the resonance tube 80 to the outside.

  Thus, in the portable terminal holder 70 according to the third embodiment having the resonance tube 80 and the portable terminal holder main body 71, the portable terminal holder 10 according to the first embodiment having the resonance tube 30 and the portable terminal holder main body 11. The same acoustic effect can be obtained.

  As mentioned above, although Example 1, 2, 3 of the portable terminal holder as an attachment for portable terminals concerning this invention was demonstrated, this invention is not limited to Example 1, 2, 3, The claim It can change suitably within the range of the invention described in the range.

1 Mobile device (smartphone)
2 screen 3 speaker unit 7 charging terminal 10, 40, 70 mobile terminal holder (accessory for mobile terminal)
11, 41, 71 Mobile terminal holder body 17 Charging pin 30, 60, 80 Resonant tube 31, 61, 81 Inlet 32, 62, 82 Outlet 30B, 60B, 80B Horn part

Claims (7)

  As a sound structure that amplifies the reproduced sound emitted from the speaker part of the portable terminal, if the reproduced sound emitted from the speaker part of the portable terminal is inserted into the acoustic structure, resonance at a frequency that resonates is emphasized from the outlet. A portable terminal holding unit that has a tube and has the resonance tube provided therein, and connects the portable terminal and the resonance tube in a state where the speaker unit of the portable terminal and the inlet of the resonance tube face each other when the portable terminal is mounted. A portable terminal holder, comprising: a tool body, wherein an outlet of the resonance tube is open to the outside of the portable terminal holder body.   The portable terminal holder according to claim 1, wherein the resonance tube is formed so that a resonance frequency appears in a frequency band of 500 Hz to 5000 Hz.   The portable terminal holder according to claim 1 or 2, wherein the outlet of the resonance tube is opened to the outside of the portable terminal holder body in a direction in which a screen of the portable terminal faces when the portable terminal is mounted.   The portable terminal holder according to any one of claims 1 to 3, wherein a horn portion is formed on an outlet side of the resonance tube.   The portable terminal holder according to any one of claims 1 to 4, wherein the portable terminal holder body holds the portable terminal in an upright state with respect to the placement surface.   The said portable terminal holder main body is provided with the charge pin which can be contacted with the terminal for charge of a portable terminal at the time of a portable terminal mounting | wearing, It serves as a charging stand. Mobile terminal holder. The mobile terminal holder body has a mounting surface for mounting the mobile terminal, and a groove formed in the mounting surface,
The resonance tube forms the inlet and the outlet in cooperation with the portable terminal holder main body and the groove of the portable terminal holder main body, and the groove is formed to open the inlet and the outlet to the outside. The portable terminal holder according to claim 1, wherein the portable terminal holder is configured using a cover that is covered and attached to a mounting surface of the portable terminal holder body.

Images