JP4230847B2 - Mobile terminal device - Google Patents

Description

  The present invention relates to a mobile terminal device such as a mobile phone or a PDA (Personal Digital Assistants), and more particularly to a mobile terminal device including a speaker for outputting a received voice or a ringtone.

  In general, this type of device has a configuration in which a speaker is arranged in the upper center portion of the front surface of the casing of the terminal, and the sound of the speaker is output from a sound emitting hole provided at a position facing the speaker on the front surface of the casing. ing. However, in recent years, mobile terminal devices are equipped with large liquid crystal display units for displaying characters and image information, and those equipped with cameras are increasing, and a speaker is installed at a desired position on the front surface of the terminal casing. It is difficult to secure enough space to do. Therefore, conventionally, for example, there has been proposed a portable terminal device in which an acoustic tube is provided in a speaker, and the sound output of the speaker is output through the acoustic tube to a sound emitting hole provided in a side portion or a rear portion of the terminal housing. (See Patent Document 1).

JP2003-111194A

However, the above-mentioned conventionally proposed devices are disadvantageous in that the speaker itself becomes complicated and large in size because a new acoustic tube is provided, and the cost of the portable terminal device employing this speaker as well as the speaker itself is increased. There is.
The present invention has been made by paying attention to the above circumstances, and the object of the present invention is to provide a portable terminal capable of efficiently outputting the sound of a speaker from a desired part of the housing while having a simple and inexpensive configuration. To provide an apparatus.

In order to achieve the above object, the present invention provides a mobile terminal device including a housing provided with a sound emitting hole, a component holder accommodated in the housing, and a speaker attached to the component holder. Then, at least one of the housing and the component holder is provided with a rib to form an acoustic duct that forms a closed space with the rib, the housing, and the component holder, and a plurality of the housing is formed along the acoustic duct. Sound emission holes are provided, and the sound generation of the speaker is guided to the plurality of sound emission holes by the acoustic duct.

Specifically, when the sound emission hole is provided at the center in the width direction of the housing and the speaker is attached to the width direction end of the component holder, the installation position of the speaker and the installation position of the sound emission hole An acoustic duct is formed at a position communicating with each other.
Therefore, according to the present invention, even if the speaker and the sound emitting hole are not opposed to each other in position, the sound output of the speaker is guided to the sound emitting hole through the acoustic duct and released outside the apparatus. For this reason, it becomes possible to emit the sound of the speaker efficiently. Moreover, since the acoustic duct is formed by using the surfaces of the existing casing and component holder only by providing a new rib, the acoustic duct can be configured easily and inexpensively. There is an advantage that can be realized without incurring a cost increase.
Further, in the present invention, a plurality of sound emitting holes are provided in the housing along the acoustic duct. For this reason, even if one of the sound emission holes is blocked by the speaker's ear, the pronunciation of the speaker will be emitted from the other sound emission holes, and the speaker can listen to the received voice. It becomes.

  In particular, when the rib is provided on the component holder by integral molding, the rib can be provided without requiring a new processing step or an assembling step, and the production can be simplified. Further, it is preferable to further provide an elastic member for airtightly holding the acoustic duct between the tip of the rib and the housing or the component holder. If it does in this way, the airtightness of an acoustic duct can be improved and, thereby, generation | occurrence | production of the sound leakage in an acoustic duct, the wobble sound by vibration of a housing | casing or a holder, etc. can be suppressed effectively.

  That is, according to the present invention, there is provided a portable terminal device capable of efficiently outputting sound generated from a speaker from a sound emitting hole provided in a desired portion of the casing, with a simple and inexpensive configuration. be able to.

1 is an exploded perspective view showing an embodiment of a portable terminal device according to the present invention, FIG. 2 is a perspective view showing an inner surface of a housing upper cover, and FIG. 3 is a state in which a component holder is accommodated in the housing upper cover. FIG.
A sound emitting hole is provided in the vicinity of the front upper end of the housing upper cover 1. The sound emission hole is for releasing sound generated from a speaker, which will be described later, to the outside of the apparatus. The two main sound emission holes 11 provided at the center in the width direction of the housing upper cover 1 and the housing It is comprised from the one auxiliary | assistant sound emission hole 12 provided in the position near the edge part of the width direction of the upper cover 1. The position of the auxiliary sound emission hole 12 is determined so as to face the speaker mounted on the component holder 2. Reference numeral 13 denotes a liquid crystal display window, which is composed of a transparent plastic plate.

  On the other hand, the component holder 2 is for holding a printed wiring board, a liquid crystal display, an antenna, etc. constituting the circuit of the portable terminal device, and having a metal plating attached to the surface of an integrally molded plastic product. Consists of. Further, a concave portion is provided at a position near the side of the front upper end portion of the component holder 2, and the speaker 3 is mounted in this concave portion. The speaker 3 is used for outputting the received sound of the other party's speaker received, the music sound reproduced by the audio, and the incoming sound or the melody sound depending on the case. When the speaker 3 is mounted, a rubber 31 as a buffer member is press-fitted into the gap between the speaker 3 and the component holder 2.

  By the way, on the front surface of the component holder 2, annular ribs 21 are provided so as to surround the speaker 3 and the sound emission holes 11 and 12 provided in the housing upper cover 1. The rib 21 is provided by integral molding when the component holder 2 is manufactured. The rib 21 together with the housing upper cover 1 and the component holder 2 forms an acoustic duct 4 that forms a closed space in the gap between the housing upper cover 1 and the component holder 2. The acoustic duct 4 plays a role of guiding the sound generated from the speaker 3 to the sound emitting holes 11 and 12.

  An annular sponge 14 made of an elastic member is attached to the inner surface of the housing upper cover 1 at a position facing the rib 21 as shown in FIG. The sponge 14 maintains the airtightness of the acoustic duct 4 by being interposed between the tip of the rib 21 and the housing cover 1. Reference numeral 15 denotes a net stretched in the sponge 14 to prevent dust from entering the housing from the main sound emitting hole 11 and the auxiliary sound emitting hole 12.

  Because of the configuration as described above, for example, the reception sound of the other party's speaker emitted from the speaker 3 during a call is guided by the acoustic duct 4 and emitted from the main sound emitting hole 11 as shown by the arrow in FIG. Is done. For this reason, even when the speaker 3 is disposed at a position near the side portion of the housing, the sound generation is efficiently and sufficiently made from the main sound emitting hole 11 provided in the central portion in the width direction of the housing upper cover 1. It can be released at volume. Moreover, since the auxiliary sound emission hole 12 is provided directly above the speaker 3 in addition to the main sound emission hole 11, even if a part or all of the main sound emission hole 11 is blocked by the speaker's ear, The pronunciation of the speaker 3 is emitted from the auxiliary sound emitting hole 12, and the speaker can listen to the received voice.

  Moreover, since the acoustic duct 4 is formed by using the surfaces of the existing casing upper cover 1 and the component holder 2 only by newly providing the rib 21 on the component holder 2, the acoustic duct 4 can be easily and inexpensively formed. It can comprise, and it can suppress the cost increase of the speaker 3 and a portable terminal device by this.

  The present invention is not limited to the above embodiment. For example, in the above embodiment, the case where the component holder 2 is provided with the rib 21 to form the acoustic duct 4 has been described as an example. However, the rib is provided on the inner surface of the housing upper cover 1 to form the acoustic duct. Also good.

  In the above embodiment, the rib 21 made of the same material as that of the component holder 2 is formed by integral molding. However, the rib is made of an elastic member such as rubber, and the rib made of the elastic member is attached to the component holder or the housing upper cover. It may be provided by bonding. If it does in this way, it will become possible to make the sponge for maintaining the airtightness of an acoustic duct unnecessary.

In addition, the speaker installation position, the position and number of sound emission holes, the shape and dimensions of the acoustic duct, the type and configuration of the portable terminal device, and the like are variously modified without departing from the scope of the present invention. it can.
In short, the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

The disassembled perspective view which shows one Embodiment of the portable terminal device concerning this invention The perspective view which shows the inner surface of a housing | casing upper cover The figure which shows the side cross-section of the state which accommodated the component holder in the housing | casing upper cover.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Housing top cover, 2 ... Parts holder, 3 ... Speaker, 4 ... Acoustic duct, 11 ... Main sound emitting hole, 12 ... Auxiliary sound emitting hole, 13 ... Liquid crystal display window, 14 ... Sponge, 15 ... Net, 21 ... ribs, 31 ... rubber.

Claims (6)

A portable terminal device comprising a housing provided with a sound emitting hole, a component holder accommodated in the housing, and a speaker attached to the component holder,
A rib is provided on at least one of the casing and the component holder to form an acoustic duct that forms a closed space by the rib, the casing, and the component holder, and a plurality of sound emission is provided to the casing along the acoustic duct. by arranging the holes, the portable terminal device characterized by directing sound of the speaker to the plurality of sound output holes by the acoustic duct. A portable terminal device comprising a housing provided with a sound emitting hole, a component holder accommodated in the housing, and a speaker attached to the component holder,
  A rib provided on at least one of the housing and the component holder;
  An acoustic duct that forms a closed space by the rib, the casing, and the component holder, and guides the sound of the speaker to the sound emitting hole;
Comprising
  A plurality of the sound emitting holes are provided in the housing along the acoustic duct. When the sound emitting hole is provided in the center in the width direction of the housing, and the speaker is attached to the width direction end of the component holder,
The portable terminal device according to claim 1 , wherein the acoustic duct is formed at a position that communicates between an installation position of the speaker and an installation position of the sound emission hole. The portable terminal device according to claim 1 , wherein the rib is provided on the component holder by integral molding. The portable terminal device according to claim 1 , further comprising an elastic member for airtightly holding the acoustic duct between a tip portion of the rib and the housing or the component holder. The mobile terminal device according to claim 1, wherein the plurality of sound emitting holes are provided on the same surface of the casing.

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