JP3088353B2 - Tool for adjusting sound quality of incoming calls for mobile phones - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone, a PHS
The present invention relates to a reception sound quality adjusting device for a mobile phone, which can be suitably used for mobile communication such as, for example, and can adjust the reception sound quality of an earpiece portion.

[0002]

2. Description of the Related Art In recent years, the development of the communication business has been remarkable. In particular, portable telephones used for mobile communications such as portable telephones and PHSs are required to be smaller and lighter. On the other hand, the acoustic circuit of a mobile phone becomes complicated in order to obtain better sound quality, the number of parts increases, and it is becoming difficult to simplify, downsize, and lighten the entire device including the circuit.

[0003] In such mobile communication, when a call is made using a mobile phone such as a mobile phone or a PHS, the situation and environment around the place where the mobile phone is used, and
It is convenient if the reception sound quality of the earpiece part can be changed depending on the mood when using the mobile phone. For example, when using a mobile phone, when the surrounding noise is loud, clear sound quality with good clarity is required, but when the user of the mobile phone is irritated, a high-pitched sound that can be heard is heard. The softer sound quality feels more comfortable than the sound quality.

FIG. 8 is a perspective view showing an example of a conventional portable telephone. In the figure, reference numeral 1 denotes a portable telephone, in which a handset, a main body circuit and the like are housed in a substantially rectangular parallelepiped casing 2. An earpiece 3, an operator 4 such as a numeric keypad, a small microphone 5, and the like are arranged on the front surface of the earpiece 2, and the earpiece 3 has a horizontally long sound hole 6 formed therein. In this mobile phone 1, after inputting the telephone number or the like of the recipient using the operating element 4, the user places the earpiece 3 against his / her ear to make a call. At this time, the volume of the sound from the sound hole 6 is adjusted to be optimal by adjusting the contact condition of the earpiece 3 to the ear.

[0005]

By the way, in the conventional portable telephone, in order to adjust the receiving sound quality of the earpiece 3, many electric circuits are added such as adding a filter circuit to the receiving circuit portion of the main circuit. Need, and
These circuits are not simple, and there is a problem that they become obstacles in reducing the size and weight.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and does not require the addition of an additional electric circuit such as a filter circuit, and has a simple configuration and is easy to handle. Is to provide.

[0007]

Here, as a result of various studies, the present inventor was able to obtain the following knowledge. In general, the size of the sound hole affects the quality of the received sound, and the smaller the sound hole, the higher the level of the high-frequency range. Therefore, the frequency characteristics can be changed by changing the sound hole area. This frequency characteristic is closely related to clarity, and controlling the frequency characteristic leads to adjustment of clarity. Therefore, if the area of the opening of the sound hole in the earpiece portion can be changed, the frequency characteristics can be changed and the clarity can be adjusted.

Accordingly, the present invention provides the following receiving sound quality adjusting device for a portable telephone in order to solve the above-mentioned problems. That is, the receiving sound quality adjusting device of the mobile phone according to the first aspect is a tool for adjusting the receiving sound quality of the earpiece portion by being attached to an earpiece portion provided in a housing of the mobile phone, and is formed on the earpiece portion. The sound quality adjusting member adjusts the area of the sound hole by inserting and removing the sound hole.

According to a second aspect of the present invention, there is provided a receiving sound quality adjusting device for a portable telephone, wherein a projection for adjusting an insertion depth is provided on a side surface of the sound quality adjusting member.

According to a third aspect of the present invention, there is provided a receiving sound quality adjusting device for a portable telephone, wherein a projection is provided along a circumferential direction of a side surface of the sound quality adjusting member to adjust an insertion depth.

According to a fourth aspect of the present invention, there is provided a receiving sound quality adjusting device for a portable telephone, wherein a plurality of the sound holes are formed.

According to a fifth aspect of the present invention, there is provided a receiving sound quality adjusting device for a portable telephone, wherein the plurality of sound holes are constituted by two or more kinds of sound holes having different areas.

The receiving sound quality adjusting device of the portable telephone according to the present invention has a sound quality adjusting member for adjusting the area of the sound hole by inserting and removing the sound hole from the sound hole formed in the earpiece portion. By inserting and removing the sound quality adjusting member into and out of the sound hole according to the above, the area of the sound hole changes, the frequency characteristics change, and the clarity can be adjusted. This makes it possible to easily adjust the clarity without affecting the configuration of the electric circuit, and to quickly respond to simplification, miniaturization, and weight reduction of the electric circuit.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a preferred embodiment of a receiving sound quality adjusting device for a portable telephone according to the present invention.

FIG. 1 shows a first embodiment of the present invention.
FIG. 2 is a cross-sectional view showing details of an earpiece part, and FIG.
Reference numeral 1 denotes a mobile phone, and an earpiece 13 is arranged on a relatively thick side of the front surface of the rectangular parallelepiped casing 12, and the earpiece 13 has a sound hole having a depth D of a mouthpiece of a receiver. It is divided into two, and the larger sound hole 14 and the smaller sound hole 15 are formed so as to be aligned in a horizontal direction.

The larger sound hole 14 is provided with a claw (projection) 16a having the same size as the sound hole 14 and protruding annularly along the circumferential direction of the side surface thereof. A (sound quality adjusting member) 16 is provided in the sound hole 14 so as to be able to be inserted and taken out. The housing 12 is made of a material
Protect the receiver, which will be described later,
2 which can be fixed to peripheral members such as 2 and has mechanical strength enough to withstand dropping, bending, twisting, etc., and as shown in FIG. 2, a rib 22 which is a fixing tool for fixing the receiver 21 is provided. Have been.

As shown in FIG. 2, the receiver 21 and the housing 1
By sandwiching the two layers of cushions 23 between them, the shock to the receiver 21 is reduced, and the receiver 21 and the housing 12 are more closely adhered to each other to prevent sound leakage. Furthermore, these cushions 23, 23 provide a waterproof / dustproof member that is a kind of waterproof / dustproof member having a thin and flexible thickness.
Both surfaces of the dustproof sheet 24 are sandwiched, and the receiver 21
The front is protected from water drops and dust.

The material of the cushion 23 is a sponge-like material, rubber or the like, which has elasticity, elasticity, and airtightness. By completely filling the gaps, a closed state can be obtained. Those having a low transmission rate and capable of preventing sound leakage are preferable. Waterproof and dustproof sheet 2
The material of 4 is excellent in water resistance like non-woven fabric etc.
Desirable is one that does not allow dust to pass through and has a good vibration propagation rate.

The ribs 22 may be any ribs as long as they can fix the receiver 21, depending on design restrictions. In particular, a cylindrical rib 22 is preferable because the receiver 21 can be securely fixed. The height of the rib 22 depends on the cushion 23 that protects the receiver 21 and the housing 12.
The height of the cushion 23 is large enough to provide an air chamber between the two, and the height is large enough to directly bond the cushion 23 to the housing 12.

On the other hand, the top 16 having the same size as the larger sound hole 14 is made of rubber or the like and has excellent elasticity and elasticity so that the sound hole 14 can be sealed. 3, a top 16 having a height H1 equal to or greater than the depth D of the sound hole 14, or a top having a height H2 equal to the depth D of the sound hole 14 as shown in FIG. (Sound quality adjusting member) 31 is used.

In the case of the top 16, the diameter is substantially the same as the diameter of the sound hole 14, and the height h is the same as the depth D of the sound hole 14.
Is provided with an annular claw 16a along the circumferential direction.
The waterproof / dustproof sheet 24 is prevented from being damaged due to excessive pressing when the sheet is inserted into the sheet 4.

On the other hand, in the case of the top 31, the diameter is
A ring-shaped claw (protrusion) 31 along the circumferential direction at a position of the same height H2 as the depth D of the sound hole 14 having a diameter R substantially equal to the diameter of the sound hole 14.
a, and a knob 31b is provided at the center of the upper surface of the top 31 so that it can be easily attached to and detached from the sound hole 14.
In addition to facilitating the insertion and removal of the frame 31, it is possible to prevent problems such as the inability to remove the top 31 due to excessive pressing when inserting into the sound hole 14.

Next, the operation of the portable telephone 11 will be described. The portable telephone 11 is characterized in that in the earpiece 13, the area of the larger sound hole 14 in which the sound hole having the depth D is divided into two, large and small, is adjusted.
As means for adjusting the area of the sound hole 14, it has the same shape as the sound hole 14, has a claw 16 a at the same height h as the depth D of the sound hole 14, and High height H1
Is used.

For example, when a call is made using a communication device including the mobile phone 11, sound quality with high clarity may be required depending on the surrounding situation and environment. In this case, it has the same shape as the sound hole 14 and the same height h as the depth D of the sound hole 14.
The sound hole area is adjusted by inserting the top 16 having the claw 16a at the position and the height H1 higher than the depth D of the sound hole 14 into the sound hole 14.

If the area of the sound hole is reduced, the level of the relatively high frequency component increases because the low frequency component is discarded, so that the frequency characteristics change and the clarity is improved.

In general, even if the low frequency components are considerably cut off, the intelligibility does not decrease so much and the influence on the sound quality is small. This is because a large amount of information is contained in a high frequency region. In order to accurately receive a large amount of information, it is necessary to increase the level of a high frequency component to improve clarity. In particular, Japanese is a word whose accent is less distinctive than English and American, and unless the clarity is increased, the intelligibility will decrease.

In this portable telephone 11, the earpiece 13
The sound hole area of the earpiece 13 is adjusted by inserting the frame 16 into the sound hole 14 having the larger value, thereby changing the frequency characteristic. When the area of the sound hole of the earpiece 13 is reduced, the level of the treble range is increased, so that the clarity is increased. Therefore, it is possible to adjust the received sound quality only by inserting the frame 16 into the sound hole 14, and the cost merit is also large. Here, the adjustment of the sound hole area is performed only with the larger sound hole 14,
This is not performed in the smaller sound hole 15.

FIG. 5 is a diagram showing a frequency characteristic between the frequency of the sound and the receiving level. A claw 16a is provided at the same height h as the depth D of the sound hole 14, and the depth D of the sound hole is higher. Frequency characteristics (A in the figure) when the top 16 having the high height H1 is inserted into the sound hole 14 and the sound hole area is adjusted, and when the sound hole area of the larger sound hole 14 is not adjusted. This is a comparison with frequency characteristics (B in the figure).

According to this figure, the frequency characteristic (A) when the sound hole area is adjusted by inserting the frame 16 into the sound hole 14 is compared with the frequency characteristic (B) when the sound hole area is not adjusted. It can be seen that the reception level is gently increasing in a high frequency region of about 3 kHz. From this result, top 16
When the sound hole area is adjusted by inserting the sound hole into the sound hole 14, it is apparent that a higher frequency component can be obtained and the clarity can be improved as compared with the case where the sound hole area is not adjusted.

According to the portable telephone 11, the ring-shaped claw 16a has the same shape as the sound hole 14, and has the annular claw 16a along the circumferential direction at the height h equal to the depth D of the sound hole 14. The top 16 having a height H1 higher than the depth D of the
The size of the sound holes 14 and 15 (sound hole area)
When the sound hole is made smaller by affecting the received sound quality, the lower frequency components are cut off, the level of the higher frequency components rises, the frequency characteristics change, the higher frequency components obtained increase, and the lower frequency components are easily reduced. Except high frequency components can be obtained. Therefore, clear sound quality with good clarity can be obtained, and intelligibility can be improved.

Further, the sound hole area can be easily changed only by inserting the frame 16 into the sound hole 14, and the frequency characteristic can be easily changed without adding a complicated electric circuit. Therefore, the intelligibility can be easily improved, and at the time of a call, the sound hole area of the earpiece 13 can be changed in accordance with the surrounding situation or environment, and the best receiving state can be obtained.

(Second Embodiment) FIG. 6 shows a second embodiment of the present invention.
FIG. 2 is a perspective view showing a mobile phone according to the embodiment of the present invention, and FIG.
Reference numeral 1 denotes a mobile phone, in which an earpiece 43 is disposed on one side of the front surface of the rectangular parallelepiped housing 42. The earpiece 43 has two large and small sound holes having a depth D of the earpiece of the receiver. The divided large sound holes 14 and small sound holes 15 are formed so as to be parallel to each other in the vertical direction. The top 31 already described in the first embodiment is provided in the larger sound hole 14 so as to be inserted into and removed from the sound hole 14.

In this portable telephone 41, an earpiece 43
In the above, the area of the larger sound hole 14 in which the sound hole having the depth D is divided into two, large and small, is adjusted. As means for adjusting the area of the sound hole 14,
Has an annular claw 31a along the circumferential direction at the same height h as the depth D of the sound hole 14, and a knob 31b at the center of the upper surface thereof so as to be easily attached to and detached from the sound hole 14. A top 31 provided and having the same height H2 as the depth D of the sound hole 14 is used.

For example, when a call is made using a communication device including the mobile phone 41, sound quality with high clarity may be required depending on the surrounding situation and environment. In this case, it has the same shape as the sound hole 14 and the same height h as the depth D of the sound hole 14.
A tab 31a is provided at the position, and a knob 31b is provided at the center of the upper surface so as to be easily attached to and detached from the sound hole 14, and the top 31 having the same height H2 as the depth D of the sound hole 14 is inserted into the sound hole 14. By doing so, it is possible to reduce the sound hole area, obtain high frequency components excluding low frequency components, obtain clear sound quality with good clarity, and improve intelligibility.

[0035]

As described above, according to the receiving sound quality adjusting device for a portable telephone of the present invention, the area of the sound hole is adjusted by inserting and removing the sound hole formed in the earpiece portion. Since the sound quality adjusting member is provided, the area of the sound hole can be changed, and the frequency characteristic can be changed by inserting and removing the sound quality adjusting member into and from the sound hole as necessary. The degree can be adjusted. Therefore, it is possible to easily adjust the clarity without affecting the configuration of the electric circuit,
It is possible to quickly respond to simplification, miniaturization, and weight reduction of electric circuits.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a mobile phone according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing an earpiece portion of the mobile phone according to the first embodiment of the present invention.

FIG. 3 is a side view showing an example of a frame of the mobile phone according to the first embodiment of the present invention.

FIG. 4 is a side view showing another example of the frame of the mobile phone according to the first embodiment of the present invention.

FIG. 5 is a diagram showing a frequency characteristic between a sound frequency and a reception level.

FIG. 6 is a perspective view showing a mobile phone according to a second embodiment of the present invention.

FIG. 7 is a sectional view showing an earpiece portion of a mobile phone according to a second embodiment of the present invention.

FIG. 8 is a perspective view showing a conventional mobile phone.

[Explanation of symbols]

 Reference Signs List 1 mobile phone 2 housing 3 earpiece 4 operator 5 small microphone 6 sound hole 11 mobile phone 12 housing 13 earpiece 14 larger sound hole 15 smaller sound hole 16 frames (sound quality adjusting member) 16a claws (protrusions) DESCRIPTION OF SYMBOLS 21 Receiver 22 Rib 23 Cushion 24 Waterproof / dustproof sheet 31 Frame (sound quality adjustment member) 31a Nail (protrusion) 31b Knob 41 Cellular phone 42 Housing 43 Earpiece A Frequency characteristic when sound hole area is adjusted B Sound hole area Frequency characteristics when not adjusted D Depth of sound hole H1 frame height H2 frame height h Position at the same height as sound hole depth R Frame diameter

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04M 1/02-1/23 H04B 7/00-7/26 H04Q 7/00-7/38 H04R 1 / 00 H04R 1/28

Claims (5)

(57) [Claims] 1. A tool for adjusting a receiving sound quality of an earpiece portion by attaching the earphone portion to an earpiece portion provided in a housing of a mobile phone, wherein the tool is inserted into and removed from a sound hole formed in the earpiece portion. A sound quality adjusting member for a mobile phone, comprising: a sound quality adjusting member for adjusting an area of the sound hole by using the sound quality adjusting member. 2. The receiving sound quality adjusting device for a mobile phone according to claim 1, wherein said sound quality adjusting member is provided with a projection for adjusting an insertion depth on a side surface thereof. 3. The receiving sound quality of a mobile phone according to claim 1, wherein said sound quality adjusting member is provided with a ridge for adjusting an insertion depth along a circumferential direction of a side surface thereof. Adjustment tools. 4. The apparatus according to claim 1, wherein a plurality of said sound holes are formed. 5. The receiving sound quality adjusting device for a mobile phone according to claim 4, wherein said plurality of sound holes are constituted by two or more kinds of sound holes having different areas.