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DESCRIPTION JPH0951598

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DESCRIPTION JPH0951598
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
electronic component attaching portion and an attaching method for attaching an electronic
component such as a piezoelectric acoustic device to an electronic device such as a receiver of a
telephone or other communication device.
[0002]
2. Description of the Related Art For example, in a piezoelectric acoustic device as described
above, a piezoelectric element is housed in a tray-like case having a step-like piezoelectric
element support portion at an intermediate portion on the inner peripheral side, and the
peripheral portion of the diaphragm is It mounts on the said piezoelectric element support part,
and it fixes with an adhesive agent. The piezoelectric element is one in which one of the
electrodes provided on both sides of a plate-like piezoelectric body is attached to the surface of
the diaphragm, and lead wires are connected to the electrode on the piezoelectric element and
the diaphragm, respectively. Is pulled out from the case.
[0003]
Such a piezoelectric acoustic device is accommodated in the housing of the electronic device and
attached with a screw or the like in consideration of the exchangeability in case of failure after
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being incorporated in the electronic device such as a mobile phone or a so-called cordless phone.
Further, the lead wire is connected to the circuit board in the housing by solder or the like. In
addition to such piezoelectric acoustic devices, for example, printed wiring boards and the like
are often screwed to the housing of electronic devices, and many of them must be considered to
be interchangeable.
[0004]
However, when screwing an electronic component to an electronic device as described above, a
step of inserting and screwing a plurality of screws into a screw hole when incorporating the
electronic component into a housing Need to Therefore, it takes time to incorporate the
electronic device into the housing. In addition, when replacing, it is necessary to loosen and
remove the screw and to fix a new one again, which is bothersome and troublesome.
[0005]
In view of the above-mentioned conventional problems, the present invention is an electronic
component attaching portion which is easy to attach the electronic component to the electronic
device, requires no trouble, and can cope with replacement etc. when the electronic component
breaks down. Provide a mounting method. Accordingly, it is an object of the present invention to
facilitate the incorporation or replacement of an electronic component into an electronic device.
[0006]
SUMMARY OF THE INVENTION In the present invention, in order to achieve the abovementioned object, a plurality of projecting locks are provided around the position where the
electronic component 1 of the resin housing 31 is attached without using screws. The protruding
pieces 34, 34 ... are disposed, and the electronic component 1 is placed between the locking
pieces 34, 34 ... to deform the tips of the locking pieces 34, 34 ... The electronic component 1
was held by .... The locking pieces 34 attach the electronic component 1 to the housing 31 using
only a part of the plurality, and when replacing the electronic component 1, the tip holding the
electronic component 1 is deformed. The locking pieces 34 ', 34',... Are cut out and unused
electronic locking pieces 34, 34,... Are used to fix the new electronic component 1 in the same
manner as described above.
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[0007]
That is, in the electronic component attachment portion and the electronic component
attachment method, a housing 31 is prepared in which a plurality of projecting locking pieces 34
project from a mounting location of the electronic component 1 on the wall surface. The
electronic component 1 is disposed between the locking pieces 34, 34, and the tips of the locking
pieces 34, 34 are deformed to hold the electronic component 1 by the locking pieces 34, 34. is
there. Here, among the plurality of locking pieces 34, 34 ..., only the upper ends of some of the
locking pieces 34, 34 ... are deformed to hold the electronic component 1, and the other locking
pieces 34, 34 ... are not yet The deformation or the deformation not to hold the electronic
component 1 is left.
[0008]
Further, when replacing the electronic component 1 due to a failure or the like, the locking
pieces 34 ', 34' ... which are deformed at the tip end are cut off and the electronic component 1 is
removed from the housing 31. Another electronic component 1 is disposed between the stop
pieces 34, 34, and the tip of some or all of the remaining locking pieces 34, 34 is deformed to
hold the electronic component 1. At this time, a weak portion having a weaker mechanical
strength than the other portions is formed on the proximal end side of the deformed distal end
portion of the locking pieces 34, 34... Cut off at part.
[0009]
In this case, it is preferable to insert an elastic member between the electronic component 1 and
the wall surface of the housing 31 and hold the electronic component 1 by the locking pieces 34
while the elastic member 35 is compressed. As a means for deforming the locking pieces 34, 34
... when fixing the electronic component 1 by deforming the tips of the locking pieces 34, 34 ..., a
tool of an ultrasonic transducer at the tips of the locking pieces 34, 34 ... It is generally possible
to use one that abuts on the horn a and the tip of a heater-heating type thermal deformation to
thermally deform the tip.
[0010]
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In the electronic component attaching portion and the attaching method according to the present
invention, when the electronic component 1 is attached to the inside of the housing 31 of the
electronic device, between the locking pieces 34, 34. , And the tip end of the locking pieces 34
may be deformed by the tool horn a of the ultrasonic transducer or the like, so that the
attachment of the electronic component 1 to the housing 31 by a screw or the like is not
necessary. When replacing the electronic component 1 due to a failure or the like, the electronic
component 1 can be taken out of the housing 31 by removing the deformed locking pieces 34.
Then, the new electronic component 1 is placed between the other locking pieces 34, 34, and the
tips of these locking pieces 34, 34, ... are deformed in the same manner as described above,
whereby the new electronic component 1 is obtained. Can be held. At this time, if fragile parts
are formed on the locking pieces 34, 34, and the locking pieces 34, 34 are cut off at this fragile
part, the locking pieces 34, 34 are cut out. Can be cut out at a fixed position.
[0011]
When the electronic component 1 is fixed to the housing 31 by the locking pieces 34, 34 ... in
this way, the electronic component 1 is held while compressing the elastic member 35 inserted
between the electronic component 1 and the housing 31, The electronic component 1 can be
fixed without backlash by the repulsive force of the elastic member 35. The elastic member 35
also has a function to absorb the vibration when the tips of the locking pieces 34 are deformed
by the tool horn a of the ultrasonic transducer, and to prevent the electronic component 1 from
being damaged by the ultrasonic vibration. Also have.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will
now be described in detail and specifically with reference to the drawings. FIGS. 1 and 2 show an
embodiment in which the present invention is applied to a case where a piezoelectric receiver as
the electronic component 1 is fixed to a housing of the electronic device. The electronic
component 1 which is this piezoelectric receiver includes a case 12 which is formed of resin or
the like in the form of a tray having an open top side, and a sound emission hole having a
plurality of small holes in the center of the bottom. 11 have been established. Further, the
piezoelectric element incorporated in the case 12 is provided with electrodes on both main
surfaces of a plate-like piezoelectric body 22 made of piezoelectric ceramic or the like, and one
electrode of the piezoelectric body 22 is made of a diaphragm 21 made of metal. And electrically
connected. The piezoelectric element is incorporated in the case 12 to constitute a piezoelectric
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receiver as the electronic component 1.
[0013]
On the other hand, the housing 31 of an electronic device such as a mobile phone or a cordless
phone incorporating such an electronic component 1 is also made of resin. A plurality of locking
pieces 34, 34... Are erected around the position at which the electronic component 1 is attached
inside the housing 31, and the opposing distance between the locking pieces 34, 34. Very
slightly larger than the external dimensions of the case 12. In the illustrated embodiment, the
case 12 forming the outer shape of the electronic component 1 is circular, and the locking pieces
34, 34 ... are arranged at regular intervals on the circumference of a diameter slightly larger than
the outer shape of the case 12 ing. In the illustrated example, six locking pieces 34 are arranged
at intervals of 60 ° around the position where the electronic component 1 is to be attached.
[0014]
Although three locking pieces 34 can be fixed to the housing of the electronic component 1 at
intervals of 120 °, they can be fixed at intervals of 60 ° as illustrated, considering replacement
of the electronic component 1. It is good to provide six. By this, as described later, after the
electronic component 1 is incorporated into the housing 31, the electronic component 1 can be
replaced only once. If nine locking pieces 34, 34,... Are provided, the electronic component 1 can
be replaced twice as described later.
[0015]
At the base of the locking pieces 34, 34, a recess 36 is provided to make the cross-sectional area
smaller than that of the other parts, whereby stress concentration occurs when the locking pieces
34, 34 are subjected to external force. The fragile part is formed. Such a fragile portion can be
formed not only in the recess 36 but also in the case where a thin kerf is inserted in the locking
pieces 34, 34, for example. Further, the fragile portion is not limited to the bases of the locking
pieces 34, 34, and may be closer to the base side than the tip portion to be deformed which will
be described later. However, in view of easy removal of the locking pieces 34, 34 ..., this fragile
portion is most preferably provided at the base of the locking pieces 34, 34 ....
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[0016]
In the illustrated embodiment, since the piezoelectric receiver is attached as the electronic
component 1, the sound output hole 32 is formed at the center of the portion surrounded by the
locking piece 34 of the housing 31, and the sound output hole 32 is waterproof and dustproof.
You may stretch the mesh for. Of course, when the electronic component 1 other than the
piezoelectric receiver is attached, it is not necessary to provide such a sound emission hole 32.
[0017]
In order to incorporate the electronic component 1 as described above into the housing 31, first,
as shown in FIG. 1, the housing 31 is arranged such that the locking pieces 34, 34. The elastic
members 35 are fitted to the inner bottoms of the locking pieces 34, 34. Next, the electronic
component 1 is disposed in the area surrounded by the locking pieces 34, 34. In this state, using
a tool horn a of an ultrasonic transducer shown by a two-dot chain line in FIG. 1 (b), the molten
head b is put on the tips of the locking pieces 34, 34. The electronic component 1 is pressed
against the wall surface of the housing 31 in a state where the elastic member 35 is
appropriately elastically compressed. In the melting head b, the contact portion has a required
shape so that the tips of the locking pieces 34, 34... Are deformed into a shape optimum for
fixing the electronic component 1 to the housing 31.
[0018]
At this time, as shown in FIG. 1A, the tips of only three locking pieces 34 are deformed every
other one of the six locking pieces 34,. .. Are left undeformed or deformed only to such an extent
that the electronic component 1 can not be fixed. Therefore, the tool horn a of the ultrasonic
transducer has melting heads b at intervals of 120 °. As a result, the electronic component 1 is
fixed to the housing 31 by the locking pieces 34 ', 34'. The vibration mode of the tool horn a of
the ultrasonic transducer may be any vibration such as longitudinal vibration or torsional
vibration, but the elastic member 35 absorbs the vibration of the tool horn a of the ultrasonic
transducer. To prevent damage to the electronic component 1 due to ultrasonic vibration. Then,
after the electronic component 1 is fixed to the housing 31, the electronic component 1 can be
held by the repulsive force of the elastic member 35, and can be fixed without rattling.
[0019]
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When replacing the electronic component 1 fixed to the housing 31 in this way, the locking
pieces 34 ′, 34 ′,... Whose tip is deformed are cut away to separate the electronic component 1
from the housing 31. When the locking pieces 34 ', 34', ... are cut out, the locking pieces 34 ', 34',
... can be easily cut out by bending the lock pieces 34 ', 34', ... outward and concentrating the
stress on the fragile portion by the recess 36. In FIG. 2, reference numeral 37 denotes a trace
obtained by cutting off the locking pieces 34 ', 34'.
[0020]
Next, a new electronic component 1 is placed between the remaining retaining pieces 34, 34, and
so on, and then the tips of the retaining pieces 34, 34 are deformed in the same manner as
described above, and the tips are deformed. The electronic component 1 is fixed to the housing
31 by the stop pieces 34 ′, 34 ′. At this time, since the locking pieces 34, 34 ... which deform
the tip are angularly shifted by 60 ° from the locking pieces 34, 34 ... which were deformed
when the electronic component 1 was first incorporated, the tool of the ultrasonic transducer
The horn a is also shifted by an angle of 60 ° about its axis so that its melting head b abuts on
the remaining retaining pieces 34, 34.
[0021]
When the electronic component 1 that may be replaced in this way is attached to the housing 31,
the deformed end portions of the locking pieces 34 may melt into the electronic component 1.
Make removal difficult. Generally, when a resin is ultrasonically melted, it is difficult to fuse
between different resin materials. Therefore, if the portions of the housing 31 and the electronic
component 1 at least in contact with the tip portions of the deformed locking pieces 34 ', 34', ...
are molded with different resin materials, welding becomes difficult. For example, handsets of
mobile phones and cordless phones are usually made of ABS resin. In this case, it is preferable to
mold the case 12 of the electronic component 1 using PBT resin, PEC resin, 66 nylon or the like.
In addition, since the tips of the locking pieces 34 'and 34' are difficult to fuse even to a material
having a melting point higher than that of the locking pieces 34, 34 to be deformed, the
deformed locking of the electronic component 1 from these viewpoints The material of the
portion in contact with the tip of the piece 34 ', 34' ... is determined. In addition, when attaching
the electronic component 1 which does not have to be replaced to the housing 31, since the fixed
fixing strength is obtained by the fusion of the tips of the deformed locking pieces 34 ', 34'. It
may be more desirable to select an easy-to-use material.
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[0022]
As described above, in the case of the illustrated embodiment, at least three locking pieces 34 are
necessary for one fixing of the electronic component 1, but four or more locking pieces are
required in one fixing. It is also possible to use pieces 34, 34. In particular, when the electronic
component 1 to be attached is a square, it is effective to use four locking pieces 34, 34 ... for one
fixing. Further, for example, when electronic parts 1 to be attached are circular, if nine locking
pieces 34 are provided at intervals of 40 °, electronic parts 1 are fixed twice to housing 31 and
then electronic parts 1 are exchanged twice. be able to.
[0023]
Next, the embodiment shown in FIG. 3 will be described. In this embodiment, instead of fixing the
electronic component 1 to the housing 31 only by the locking pieces 34, 34... 38 are provided in
an arc shape over an angle of about 60 °, and four locking pieces 34, 34. In this case, after one
edge of the electronic component 1 is fitted into the locking wall 38, the other outer peripheral
portion is inserted into the inside of the locking pieces 34, 34.
[0024]
In the case of this embodiment, among the four locking pieces 34, 34, the tips of every two other
locking pieces 34, 34 are deformed to fix the electronic component 1, and the remaining two
locks are fixed. The pieces 34, 34 are left undeformed. And when replacing | exchanging the
electronic component 1, two locking pieces 34 and 34 which deform | transformed the tip are
cut off, and the remaining two locking pieces 34 and 34 are used. That is, it differs from the
previous embodiment in that the locking wall 38 substitutes for the two locking pieces 34,34. In
this case, two or more locking pieces 34, 34 for deforming the tip may be sufficient.
[0025]
The example of the cross-sectional shape of the locking piece 34 is shown in FIG. In FIG. 4 (a), the
recess 36 is provided on both the inside and the outside of the locking piece 34, and in FIG. 4 (b),
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the recess 36 is provided only on the inside of the locking piece 34. The recesses 36 may be
provided on both sides of the locking piece 34. Further, as described above, the fragile portion of
the locking piece 34 may be a portion where stress concentrates when the locking piece 34 is
deformed, and therefore the fragile portion can be formed by a kerf or the like. In the above
embodiments, the piezoelectric receiver is mainly described as an example of the electronic
component 1 attached to the housing 31. In addition, piezoelectric sounders, printed boards,
speakers, power supply units, various switches, etc. Various electronic components can be
mounted to the housing 31 in the same manner.
[0026]
As described above, according to the present invention, the attachment of the electronic
component 1 to the housing 31 with a screw or the like is not necessary, and the incorporation
of the electronic component 1 into the housing 3 is facilitated. Also, when replacing the
electronic component 1 due to a failure or the like, the deformed locking pieces 34, 34 ... at the
tip are removed, and after the electronic component 1 is removed from the housing 1, another
locking piece 34, 34 By using ..., it becomes possible to attach the new electronic component 1 to
the housing 1 without requiring the attachment of the electronic component 1 to the housing 31
by a screw or the like. This facilitates assembly and replacement of the electronic component 1
into the housing 31.
[0027]
Brief description of the drawings
[0028]
1 is a plan view and a longitudinal sectional side view of the electronic component mounting
position of the electronic device showing the electronic component mounting portion and the
mounting method according to the embodiment of the present invention.
[0029]
2 is a plan view and a longitudinal cross-sectional view of the electronic component mounting
position of the electronic device after replacing the electronic component mounting portion
according to the embodiment of the present invention and the electronic component showing the
mounting method.
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[0030]
3 is a plan view and a longitudinal sectional side view of the electronic component mounting
position of the electronic device showing the electronic component mounting portion and the
mounting method according to another embodiment of the present invention.
[0031]
4 is a longitudinal side view of an essential part of the vicinity of the locking piece of the housing
of the electronic device in the embodiment.
[0032]
Explanation of sign
[0033]
DESCRIPTION OF SYMBOLS 1 Electronic component 31 Housing 34 Locking piece 34 'Locking
piece 35 whose tip is deformed Elastic member a Tool horn of ultrasonic transducer b Melting
head
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