JP2010232960A - Sound insulator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently prevent the intrusion of noise and sound leakage. <P>SOLUTION: The sound insulator 10 includes a top plate 14 facing the upper surface 2c of a cellular phone body 1 with an ear piece 3 formed on the front surface 2a, and a pair of side plates 12 and 13 facing the left and right side faces 2d and 2e of the cellular phone body 1 respectively. The height of the side plates 12 and 13 with the front surface 2a of the cellular phone body 1 as a reference is gradually reduced toward the lower part, the front end faces 12a and 13a of the side plates 12 and 13 are inclined to the front surface 2a of the cellular phone body 1, the gradient of the front end face 13a of the side plate 13 to the front surface 2a of the cellular phone body 1 is gentler than the gradient of the front end face 12a of the side plate 12, and a distance from the front surface 2a of the cellular phone body 1 to the front end face 13a of the side plate 13 is longer than a distance to the front end face 12a of the side plate 12 at the same position in the vertical direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a sound insulator, and more particularly to a sound insulator for a receiving terminal.

  Some telephones are equipped with sound insulation (soundproofing equipment) so that the voice of the other party can be easily heard. For example, as described in Patent Document 1, a cover as a sound insulator is attached to a telephone, and the cover surrounds the upper surface from the side of the telephone, and a part of the cover is further forward from the front of the telephone. It protrudes. When making a call, cover the earpiece and ear of the phone with a cover.

JP-A-8-154119

  However, in the cover described in Patent Document 1, the protruding height from the front surface of the telephone to the edge of the cover is uniform, and the shape of the human head is not taken into consideration. The effect was not sufficient because it leaked into the cover and external noise entered into the cover.

  Therefore, a problem to be solved by the present invention is to more efficiently prevent noise intrusion and sound leakage.

  In order to solve the above-mentioned problems, according to the invention according to claim 1, the sound insulating device is opposed to the upper surface of the receiver terminal body in which the earpiece is formed on the front surface, and forward from the front surface of the receiver terminal body. And a pair of side plates facing the left and right side surfaces of the receiving terminal body and protruding forward from the front surface of the receiving terminal body, and the pair of the base plates with respect to the front surface of the receiving terminal body As the height of the side plate gradually decreases, the front end surfaces of the pair of side plates are inclined with respect to the front surface of the receiving terminal main body, and the gradient of the front end surface of one side plate with respect to the front surface of the receiving terminal main body is The slope of the front end surface of the other side plate relative to the front surface of the receiver terminal body is gentler, and the distance from the front surface of the receiver terminal body to the front end surface of the one side plate is the front in the same vertical position From the front of the receiver terminal body it was longer than the distance to the front end surface of the other side plate.

  According to the second aspect of the present invention, the sound insulating device is opposed to the upper surface of the receiver terminal body having the earpiece formed on the front surface, and projects from the front surface of the receiver terminal body to the front, and the receiver terminal. A pair of side plates facing the left and right side surfaces of the main body and projecting forward from the front surface of the receiver terminal main body, a rear plate disposed on the rear side of the receiver terminal main body, the rear plate and the receiver terminal main body A movable plate disposed between the rear surfaces and in contact with the rear surface of the receiver terminal main body; and an inclination adjusting unit that adjusts an inclination angle of the movable plate about two axes that are parallel to the front surface of the rear plate and orthogonal to each other; It was decided to provide.

  According to the first aspect of the present invention, in consideration of the shape of the human head, the periphery of the auricle can be covered as much as possible by the top plate and the pair of side plates, and noise intrusion and sound leakage can be more efficiently performed. Can be prevented. Therefore, the sound emitted from the earpiece is easily transmitted to the ear canal in the top plate and the pair of side plates, and the sound can be heard louder.

  According to the invention according to claim 2, by adjusting the inclination angle of the movable plate by the inclination adjusting unit, the relationship of the gradients of the front end surfaces of the pair of side surfaces can be made as in the invention according to claim 1. . Therefore, the same effect as that of the invention according to claim 1 is obtained. In addition, since the movable plate can be adjusted, this sound insulating device can be used for both the right and left ears.

It is drawing which showed the mobile telephone main body in 1st Embodiment of this invention. It is drawing which showed the sound insulation tool in the embodiment. It is the perspective view which showed the sound insulation tool in the embodiment. It is a side view of the state which attached the sound insulation tool to the mobile telephone main body in the embodiment. It is drawing which attached the sound insulation tool to the mobile telephone main body in the same embodiment, and showed the use condition. It is the graph which showed the result of having measured the frequency characteristic in the embodiment and the comparative example. It is drawing which showed the sound insulation tool in 2nd Embodiment of this invention. It is drawing which showed the sound insulation tool in the embodiment.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing. However, the embodiments described below are given various technically preferable limitations for carrying out the present invention, but the scope of the present invention is not limited to the following embodiments and illustrated examples.

[First Embodiment]
The mobile phone according to this embodiment includes the mobile phone body 1 shown in FIG. 1 and the sound insulation tool 10 shown in FIGS. 2 and 3.

  First, the mobile phone body 1 will be described. FIG. 1A is a front view, FIG. 1B is a side view, and FIG. 1C is a bottom view. FIG. 1B is an enlarged view of the receiver.

  As shown in FIG. 1, the mobile phone body 1 has a straight type. That is, the casing 2 of the mobile phone body 1 has a rectangular parallelepiped shape, and the thickness of the casing 2 in the front-rear direction is smaller than the length of the casing 2 in the vertical direction and the width of the casing 2 in the horizontal direction. The length in the direction is smaller than the width in the left-right direction of the housing 2. Therefore, the front surface 2a and the rear surface 2b of the housing 2 are rectangular, the left and right sides of the front surface 2a and the rear surface 2b are long sides, and the upper and lower sides of the front surface 2a and the rear surface 2b are short sides. The housing 2 is made of resin, particularly acrylic (PMMA).

  Inside the housing 2, an antenna and a circuit board are accommodated, and various electronic components (for example, an IC chip and a CPU) are mounted on the circuit board. Further, a display unit and a push button group are provided on the front surface 2 a of the housing 2. The earpiece 3 is formed in the upper part of the front surface 2 a of the housing 2, and the earpiece 3 penetrates to the inside of the housing 2. A receiving electroacoustic transducer 4 is attached to a portion inside the housing 2 and facing the earpiece 3. The electroacoustic transducer 4 is a receiver or a speaker. In addition, a mouthpiece is formed in the lower part of the front surface 2a of the housing 2, and an electroacoustic transducer (microphone) for sending is formed in a portion inside the housing 2 and facing the mouthpiece. Is attached.

The sound insulator 10 will be described.
2 and 3 are drawings showing a sound insulating device 10 attached to the mobile phone body 1. 2B is a side view, FIG. 2A is a cross-sectional view taken along the line AA shown in FIG. 2B, and FIG. 2C is a bottom view. FIG. 3 is a perspective view.

  The sound insulator 10 includes a rear plate 11, side plates 12 and 13, and a top plate 14. The rear plate 11 has a rectangular shape (including a square). Side plates 12 and 13 are connected to the left and right sides of the rear plate 11, respectively, and the side plates 12 and 13 are provided upright with respect to the rear plate 11. The side plates 12 and 13 are provided from the upper end to the lower end on both the left and right sides of the rear plate 11. The side plate 12 and the side plate 13 are parallel, and the distance between the side plate 12 and the side plate 13 is equal to the width in the left-right direction of the mobile phone body 1.

  A top plate 14 is connected to the upper side of the rear plate 11, and the top plate 14 is provided upright with respect to the rear plate 11. The upper ends of the side plates 12 and 13 are connected to the left and right sides of the top plate 14, respectively, and the side plates 12 and 13 and the top plate 14 form a U-shape when viewed from the front.

The height of the side plate 12 relative to the front surface 11 a of the rear plate 11 gradually decreases as it goes downward, and the front end surface 12 a of the side plate 12 is inclined with respect to the front surface 11 a of the rear plate 11.
The height of the top plate 14 with respect to the front surface 11a of the rear plate 11 gradually increases from the side plate 12 side toward the side plate 13 side, and the front end surface 14a of the top plate 14 is inclined with respect to the front surface 11a of the rear plate 11. Yes.
The height of the side plate 13 with respect to the front surface 11 a of the rear plate 11 gradually decreases as it goes downward, and the front end surface 13 a of the side plate 13 is inclined with respect to the front surface 11 a of the rear plate 11.

The height H ₁₃ at the upper end portion of the front end surface 13a of the side plate ₁₃ (based on the front surface 11a of the rear plate 11) is the height H ₁₂ at the upper end portion of the front end surface 12a of the side plate ₁₂ (the front surface 11a of the rear plate 11). Is higher than The height h ₁₃ at the lower end portion of the front end surface 13a of the side plate ₁₃ (based on the front surface 11a of the rear plate 11) is the height h ₁₂ at the lower end portion of the front end surface 12a of the side plate ₁₂ (the front surface 11a of the rear plate 11). Is higher than Further, the gradient from the upper end to the lower end of the front end surface 13 a of the side plate 13 is gentler than the gradient from the upper end to the lower end of the front end surface 12 a of the side plate 12.

  FIG. 4 is a side view of the state in which the sound insulator 10 is mounted on the mobile phone body 1. As shown in FIG. 4, the rear surface 2 b of the housing 2 faces the front surface 11 a of the rear plate 11, the upper surface 2 c of the housing 2 faces the top plate 14, and the left and right side surfaces 2 d and 2 e of the housing 2 are side plates 12 and 13. The housing 2 is fitted into a space surrounded by the side plates 12 and 13 and the top plate 14. The top surface 2 c of the housing 2 is brought as close as possible to the top plate 14, and preferably the top surface 2 c is in contact with the top plate 14.

  In a state where the rear surface 2 b of the housing 2 is in contact with the front surface 11 a of the rear plate 11, the side plates 12 and 13 and the top plate 14 of the sound insulating device 10 protrude forward from the front surface 2 a of the housing 2. The height of the side plate 12 with respect to the front surface 2 a of the housing 2 gradually decreases as it goes downward, and the front end surface 12 a of the side plate 12 is inclined with respect to the front surface 2 a of the housing 2. Further, the height of the top plate 14 with respect to the front surface 2a of the housing 2 gradually increases from the side plate 12 side toward the side plate 13 side, and the front end surface 14a of the top plate 14 is inclined with respect to the front surface 2a of the housing 2. is doing. Further, the height of the side plate 13 relative to the front surface 2 a of the housing 2 gradually decreases as it goes downward, and the front end surface 13 a of the side plate 13 is inclined with respect to the front surface 2 a of the housing 2. The distance from the front surface 2a of the housing 2 to the front end surface 13a of the side plate 13 is longer than the distance from the front surface 2a of the housing 2 to the front end surface 12a of the side plate 12 at the same vertical position.

  This sound insulator 10 is used when receiving a voice with the right ear. That is, as shown in FIG. 5, holding the sound insulator 10 and the mobile phone body 1 with the right hand, the front surface 2a of the mobile phone body 1 and the front surface of the sound insulator 10 (side plates 12, 13 and front end surfaces 12a of the top plate 14, 13a, 14a) is turned to the right profile, and the pinna 21 of the right ear is inserted into the space surrounded by the side plates 12, 13 and the top plate 14, and the earpiece 3 is brought close to the mouth of the ear canal of the right ear. At this time, the top plate 14 is set on the upper side (the top of the head), the side plate 12 is set on the front side (face side), and the side plate 13 is set on the rear side (back side of the head). The front end surfaces 12a, 13a, 14a of the side plates 12, 13 and the top plate 14 may be applied to the side of the face.

  In addition, although the said sound insulation tool 10 was used for a right ear, the sound insulation tool used on the left turns the sound insulation tool 10 right and left.

  Since the auricle 21 is covered with the side plates 12 and 13 and the top plate 14 and the external sound is blocked by the side plates 12 and 13 and the top plate 14, the electroacoustic transducer 4 can be used even in places where the external sound is loud, such as outdoors. The output sound can be heard clearly. In addition, the sound output from the electroacoustic transducer 4 is less likely to leak out of the side plates 12 and 13 and the top plate 14, and the sound is easy to hear.

In particular, the front end surfaces 12a, 13a, and 14a of the side plates 12 and 13 and the top plate 14 are inclined surfaces as described above with respect to the front surface 2a of the mobile phone body 1, so that the sound can be heard more clearly. be able to.
Further, since the height of the side plate 13 with respect to the front surface 2a of the housing 2 is higher than the height of the side plate 12 at the same vertical position, the front end surface 12a of the side plate 12 is applied to the cheek in front of the auricle 21. Also, the front end face 13 a of the side plate 13 can be applied to the rear part of the auricle 21. Therefore, the sound insulation effect by the side plates 12 and 13 is excellent.
Further, since the height of the side plates 12 and 13 with respect to the front surface 2a of the housing 2 gradually decreases, the side plates 12 and 13 are formed on the lower portion of the front surface 2a of the housing 2 even if the side plates 12 and 13 are present. The mouth can be brought closer to the mouth. For this reason, the generated voice is easily propagated to the mouthpiece, and noise hardly enters the mouthpiece.
Moreover, since the bottom plate facing the top plate 14 is not provided at the lower end portion of the rear plate 11, the sound insulating device 10 can be reduced in size and weight.

FIG. 6 is a graph showing the results of measuring frequency characteristics.
Specifically, the sound insulation 10 covers the auricle of a silicon auricle type for a dummy head (a silicon type in the shape of a human head, with a measuring instrument attached to the ear). The sound insulating device 10 and the cellular phone body 1 were set to (see FIG. 5), a sweep wave was input to the electroacoustic transducer 4, and the frequency characteristics were measured with a measuring instrument. The result is shown by the dotted line in FIG. 6 (legend “with cover (tilt)”).

  Further, as a comparative example, without using the sound insulator 10, only the mobile phone body 1 is set to a dummy silicon auricle type, a sweep wave is input to the electroacoustic transducer 4, and the frequency characteristics are measured with a measuring instrument. did. The result is shown by the thick line in FIG. 6 (legend “no cover”). Compared with the case where the sound insulator 10 was not used, the sound volume was greatly improved particularly in the region up to 2 kHz, and a maximum volume increase of 14 dB could be confirmed.

  Further, as a comparative example, a sound insulator different from the sound insulator 10 and the mobile phone body 1 are set to a dummy silicon auricle type, a sweep wave is input to the electroacoustic transducer 4, and a frequency characteristic is measured by a measuring instrument. did. The result is shown by a thin line in FIG. 6 (legend “with cover (equal)”). The sound insulation here has a rear plate, a top plate, and a pair of side plates, similar to the sound insulation device 10, but the front end surface of the top plate and the front end surface of the side plate are not inclined with respect to the front surface of the rear plate, It is parallel. Therefore, when the sound insulator is attached to the mobile phone body 1, the height of the top plate and the pair of side plates with respect to the front surface 2a of the mobile phone body 1 is uniform, and the side plates 12, 13 of the sound insulator 10 and It is equal to the average height of the top plate 14. When this sound insulator is used, the sound volume is greatly improved in the region up to 2 kHz as compared with the case where the sound insulator or sound insulator 10 is not used, but in the sound volume compared with the case where the sound insulator 10 is used. It turns out that it is inferior to 10 dB at the maximum.

[Modification]
Although the sound insulator 10 is an attachment type, the sound insulator 10 may be attached to the mobile phone body 1. That is, the top plate 14 may be attached to the upper surface 2c of the housing 2, and the side plates 12 and 13 may be attached to the left and right side surfaces 2d and 2e of the housing 2 to the side plates 12 and 13, respectively. In this case, the rear plate 11 may be omitted.
Here, the side plates 12 and 13 and the top plate 14 may be divided, and the side plates 12 and 13 and the top plate 14 may be connected to the housing 2 by hinges. Then, when not receiving, the side plates 12 and 13 and the top plate 14 are rotated to the back side of the housing 2 around the hinge, and the side plates 12 and 13 and the top plate 14 are placed on the rear surface 2b of the housing 2. The side plates 12, 13 and the top plate 14 do not get in the way. On the other hand, when receiving a call, the side plates 12 and 13 and the top plate 14 are rotated around the hinges so that the side plates 12 and 13 and the top plate 14 are brought into contact with the left and right side surfaces 2d and 2e and the top surface 2c of the housing 2, respectively. The side plates 12, 13 and the top plate 14 can be protruded forward from the front surface 2 a of the housing 2.

[Second Embodiment]
FIG. 7 shows the sound insulation tool 110 of the second embodiment. Here, FIG. 7A is a front view, and FIG. 7B is a side view.

  The sound insulation device 110 includes a rear plate 111, side plates 112 and 113, a top plate 114, a movable plate 115, and an inclination adjusting unit 116. The rear plate 111 has a rectangular shape (including a square). Side plates 112, 113 are connected to the left and right sides of the rear plate 111, respectively, and the side plates 112, 113 are provided upright with respect to the rear plate 111. The side plates 112 and 113 are provided from the upper end to the lower end on both the left and right sides of the rear plate 111. The side plate 112 and the side plate 113 are parallel.

  A top plate 114 is connected to the upper side of the rear plate 111, and the top plate 114 is provided upright with respect to the rear plate 111. The upper ends of the side plates 112 and 113 are connected to the left and right sides of the top plate 114, respectively. The side plates 112 and 113 and the top plate 114 form a U-shape when viewed from the front.

  The heights of the side plates 112 and 113 and the top plate 114 with respect to the front surface 111a of the rear plate 111 are uniform, and the front end surfaces 112a, 113a and 114a of the side plates 112 and 113 and the top plate 114 are flush with each other. At the same time, it is parallel to the front surface 111 a of the rear plate 111. A movable plate 115 is superimposed on the front surface 111 a of the rear plate 111. The movable plate 115 is a flat plate.

  The inclination adjusting unit 116 adjusts the inclination angle of the movable plate 115 with respect to the rear plate 111. Specifically, the inclination adjusting unit 116 adjusts the inclination angle of the movable plate 115 that is parallel to the front surface 111a of the rear plate 111 and is orthogonal to each other (hereinafter referred to as orthogonal two axes). is there. Here, the inclination adjusting unit 116 has four screws 116a to 116d. The screws 116a to 116d are screwed into the rear plate 111 while being passed through the rear plate 111 from the rear surface to the front surface 111a, and a movable plate 115 is provided at the tip of the screws 116a to 116d. These screws 116 a to 116 d are respectively arranged at the four corners of the rear plate 111.

  With respect to the sound insulator 110 as well as the sound insulator 10 of the first embodiment, the rear surface 2b of the housing 2 of the mobile phone body 1 faces the front surface 115a of the movable plate 115, and the upper surface 2c of the housing 2 faces the top plate 114. The housing 2 is fitted into a space surrounded by the side plates 112 and 113 and the top plate 114.

  Then, by rotating the screws 116a to 116d respectively and adjusting the height from the front surface 111a of the rear plate 111 to the tips of the screws 116a to 116d, the inclination angle of the movable plate 115 around the two orthogonal axes is adjusted. be able to.

For example, as shown in FIG. 8A, the height to the tip is increased in the order of the screw 116c, the screws 116b and 116d, and the screw 116a. Then, the height of the side plate 112 with respect to the front surface 115a of the movable plate 115 gradually decreases as it goes downward, and the front end surface 112a of the side plate 112 is inclined with respect to the front surface 115a of the movable plate 115 (the front surface 2a of the housing 2). The same applies to the above). The height of the top plate 114 with respect to the front surface 115a of the movable plate 115 gradually decreases from the side plate 112 side toward the side plate 113 side, and the front end surface 114a of the top plate 114 is inclined with respect to the front surface 115a of the movable plate 115. To do. Further, the height of the side plate 113 with respect to the front surface 115 a of the movable plate 115 gradually decreases as it goes downward, and the front end surface 113 a of the side plate 113 is inclined with respect to the front surface 115 a of the movable plate 115. The gradient of the front end surface 112a of the side plate 112 with respect to the front surface 115a of the movable plate 115 is gentler than the gradient of the front end surface 113a of the side plate 113 with respect to the front surface 115a of the movable plate 115. Furthermore, the distance from the front surface 115a of the movable plate 115 to the front end surface 112a of the side plate 112 is longer than the distance from the front surface 115a of the movable plate 115 to the front end surface 113a of the side plate 113 at the same vertical position.
In this case, it is suitable for receiving with the left ear.

  On the other hand, as shown in FIG. 8B, the height to the tip is increased in the order of the screw 116d, the screws 116a and 116c, and the screw 116b. In this case, similarly to the sound insulating device 10 in the first embodiment, it is suitable for the case of receiving with the right ear.

  Note that the number of screws used in the inclination adjusting unit 116 is not limited to four, and may be three or more. Further, as the tilt adjusting unit 116, a universal joint or a pan / tilt mechanism may be used instead of using three or more screws. For example, if a universal joint or a pan / tilt mechanism is provided between the movable plate 115 and the rear plate 111, the inclination angle of the movable plate 115 around two orthogonal axes can be adjusted. Moreover, although the movable plate 115 is a rectangular flat plate, if it is a circular flat plate, it is easy to adjust the inclination angle of the movable plate 115 around two orthogonal axes.

  In each of the above-described embodiments, the example of the mobile phone main body 1 is described as an example of the receiver terminal main body. However, the PHS mobile terminal main body, the stationary telephone receiver, the cordless phone cordless handset main body, 10,110 may be attached.

DESCRIPTION OF SYMBOLS 1 Cellular phone main body 2 Case 2d, 2e Side surface 2c Upper surface 3 Earpiece 4 Electroacoustic transducer 10, 110 Sound insulation device 11, 111 Rear plate 12, 13 Side plate 14, 114 Top plate 115 Movable plate 116 Tilt adjustment part

Claims (2)

A top plate that protrudes forward from the front surface of the receiver terminal body, while facing the upper surface of the receiver terminal body on which the earpiece is formed on the front surface,
A pair of side plates that face the left and right side surfaces of the receiver terminal body and protrude forward from the front surface of the receiver terminal body,
The height of the pair of side plates with respect to the front surface of the receiver terminal body is gradually reduced as it goes downward, and the front end surfaces of the pair of side plates are inclined with respect to the front surface of the receiver terminal body,
The slope of the front end face of one side plate with respect to the front surface of the receiver terminal body is gentler than the slope of the front end face of the other side plate with respect to the front face of the receiver terminal body, and the front end of the one side plate from the front face of the receiver terminal body The sound insulation device characterized in that the distance to the surface is longer than the distance from the front surface of the receiver terminal body to the front end surface of the other side plate at the same vertical position. A top plate that protrudes forward from the front surface of the receiver terminal body, while facing the upper surface of the receiver terminal body on which the earpiece is formed on the front surface,
A pair of side plates that face the left and right side surfaces of the receiver terminal body and protrude forward from the front surface of the receiver terminal body,
A rear plate disposed on the rear side of the receiver terminal body;
A movable plate disposed between the rear plate and the rear surface of the receiver terminal body, and abutting against the rear surface of the receiver terminal body;
A sound insulation device comprising: an inclination adjusting unit that adjusts an inclination angle of the movable plate around two axes that are parallel to the front surface of the rear plate and orthogonal to each other.

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