JPS6231905Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a component mounting structure in a small electronic device such as a portable electronic watch.

2. Description of the Related Art Conventionally, a so-called portable electronic watch is known as a small electronic device, which includes a piezoelectric buzzer that generates an alarm sound, and a battery that drives the piezoelectric buzzer and other functions.

In this type of portable electronic timepiece, the piezoelectric buzzer and the battery are housed in separate housing cases, and these housing cases are each independently arranged within the watch case body.

Therefore, in the case of the portable electronic watch as described above, when the piezoelectric buzzer and the battery are stacked and arranged in the watch case body, the thickness of the watch case body is reduced by each of the storage cases. There is a problem that the watch case becomes thick, and when the storage cases are arranged side by side, the watch case main body becomes large. Furthermore, since the piezoelectric buzzer and the battery are housed in separate storage cases, the number of parts increases, and furthermore, the manufacturing and assembly work becomes troublesome. Furthermore, the structure of the watch case body that houses each of the storage cases becomes complicated.
It also had drawbacks such as being extremely troublesome to prepare.

This idea was made with the above points in mind, and its purpose is to make small electronic devices smaller and thinner, have a simple structure, have fewer parts, and It is an object of the present invention to provide a component mounting structure in a small electronic device that allows easy mounting work.

An embodiment of this invention will be described below based on the drawings. In the figure, 1 is a case of a portable electronic watch, and this case 1 consists of a box-shaped frame 2 made of synthetic resin with an open bottom, and a frame 2 made of synthetic resin.
It consists of a metal upper panel 3 attached to the upper part of the frame 2 and a metal lower panel 4 attached to the lower part of the frame 2. It has a structure that covers the The upper surface of the case 1, that is, the upper panel 3, includes a display section 5 that displays the time, various buttons 6 for setting the time, setting the alarm time, and stopping the alarm. Sound holes 7... are provided. In this case, the sound emitting holes 7 are formed in the upper panel 3 and the frame 2 arranged inside the upper panel 3.

As shown in FIGS. 2 and 3, an annular holding frame 8 surrounding the sound emitting holes 7 is formed on the inner surface of the frame 2. It is designed to hold a piezoelectric buzzer 9. Below this holding frame 8, a mounting plate 10 for housing and holding the piezoelectric buzzer 9 is arranged as follows. That is, the mounting plate 10
is a rectangular flat plate made of synthetic resin, and has insertion holes 12 formed at its four corners, into which the mounting screws 11 are inserted.
1... are inserted and the mounting screws 11... are screwed into screw holes 13... formed in the frame 2, whereby the mounting plate 10 is attached to the frame 2. Further, a buzzer housing section 14 for housing the piezoelectric buzzer 9 is integrally formed on the upper surface of the mounting plate 10, and a notch (not shown) through which the lead wires 9a and 9a of the piezoelectric buzzer 9 are inserted. ) are also formed. Further, a battery storage section 16 for storing a button-shaped lithium battery 15 is integrally formed on the lower surface of the mounting plate 10. This battery storage part 16 includes an annular storage frame 17 into which the lithium battery 15 fits, and a part of this storage frame 17 is cut out, and the lithium battery 15 is introduced into the center of the storage frame 17 from here.
A leaf spring-shaped electrode 18 that contacts one pole and another part of the storage frame 17 are cut out, and elastically protrudes from there into the inside of the storage frame 17 and contacts the ten poles of the lithium battery 15. The structure includes an electrode 19 that Furthermore, the above mounting plate 1
0 and on the side of the battery storage section 16 (the third
An elastic pressing portion 20 is also integrally formed on the left side in the figure. This elastic pressing portion 20 is connected to the mounting plate 1
a support wall 21 hanging down from the lower surface of the support wall 21, and two guide locking portions 22 and 22 projecting horizontally from the lower ends of both sides of the support wall 21 toward the battery storage section 16 side,
It is composed of an elastic part 23 that is stretched between the guide locking parts 22 and 22 and is elastically deformed by bending in the horizontal direction, and a pressing part 24 that is formed in the middle of this elastic part 23 to protrude toward the battery storage part 16 side. In addition, the support wall 21, the guide locking portion 22, 22,
The elastic part 23 and the pressing part 24 are integrally molded.

A rectangular opening 25 is formed in the lower panel 4 disposed below the mounting plate 10 and attached to the frame 2, and a battery cover 26 can be attached to and removed from the opening 25. It can be installed freely. This battery cover 26 is a flat metal plate, and has an inverted L-shaped insertion portion 27 at one end.
is formed, and two inverted L-shaped locking claws 28, 28 are formed at the other end. Therefore, the battery lid 26 has the elastic pressing portion 20
Due to the elastic force of the elastic part 23, the insertion part 27 is engaged with the guide engagement part 22.22 while the battery cover 26 is pressed toward the engagement part 29.29 formed on the frame 2. At the same time, the locking pawl 28.28 is configured to be locked to the locking portion 29.29. In addition, the battery cover 2
Anti-slip protrusions 30 are provided on the outer surface of 6. Note that a blind plate 31 is provided in the opening 25 so that the inside of the case 1 cannot be seen. That is, the blind plate 31 is obtained by press-deforming the lower panel 4 to the inside of the opening 25 by pressing, and has various openings formed therein.

Further, the lead wires 9a, 9a of the piezoelectric buzzer 9 and each electrode 18, 19 of the battery storage part 16 are connected to a printed circuit board (not shown) disposed inside the case 1.
It is connected to the.

Next, the case of assembling the portable electronic watch as described above will be explained. First, the piezoelectric buzzer 9 is housed in the buzzer housing 14 formed on the top surface of the mounting plate 10. At this time, the piezoelectric buzzer 9 is fixed with adhesive or double-sided tape. After that, lift the mounting plate 10 so that the piezoelectric buzzer 9 corresponds to the holding frame 8 formed on the frame 2, and insert the mounting screws 11 into the insertion holes 12 of the mounting plate 10. , screw hole 13 of frame 2
...screw it inside. As a result, the piezoelectric buzzer 9 is attached between the mounting plate 10 and the holding frame 8, and the sound emitting holes 7 formed in the frame 2...
Both are placed in corresponding locations. After that, the upper panel 3 and the lower panel 4 are attached to the upper and lower sides of the frame 2, respectively.
The lithium battery 15 is housed in the battery storage part 16 formed on the lower surface of the mounting plate 10 through the opening 25 of the cover plate 31 and the opening of the blind plate 31, and the battery cover 26 is attached to the opening 25.

Therefore, in the portable electronic watch configured as described above, the buzzer storage section 14 that stores the piezoelectric buzzer 9 and the battery storage section 16 that stores the lithium battery 15 are provided on one mounting plate 10. Since it is integrally formed, the number of parts can be reduced, and by simply attaching the mounting plate 10 to the frame 2, the two storage sections 14 and 16 can be placed inside the case 1 at the same time. , the installation work of each of the storage sections 14 and 16 can be easily performed. Furthermore, since the buzzer storage section 14 and the battery storage section 16 are integrally formed on the front and back surfaces of the single mounting plate 10, the mounting space for the piezoelectric buzzer 9 and the lithium battery 15 is reduced. The overall size of the case 1 can be reduced, and the thickness when the piezoelectric buzzer 9 and the lithium battery 15 are mounted can be reduced. As a result, the portable electronic watch can be made smaller and thinner. can be measured. Furthermore, since the mounting plate 10 is made of synthetic resin, each of the storage sections 1
4.16 can be molded at the same time, making it easy to manufacture. Furthermore, since the mounting plate 10 is configured to be easily mounted to the frame 2 using the mounting screws 11, it is only necessary to form the screw holes 13 in the frame 2.
The mounting structure of the frame 2 is simple, and in turn, the structure of the case 1 can be simplified.

In the above embodiment, only one battery storage section 16 is formed on the lower surface of the mounting plate 10, but the invention is not limited to this, and two or more battery storage sections 16 may be formed. .

Furthermore, this invention is not limited to the above-mentioned portable electronic watch, but can also be applied to desk-top electronic calculators, etc.
It can also be applied to electronic devices having other piezoelectric buzzers.

As explained in detail above, according to the component mounting structure for a small electronic device according to this invention, a ring-shaped holding frame is attached to the top surface of the case in which a plurality of sound emitting holes are formed on the top surface so as to surround the sound emitting holes. A buzzer storage recess is formed on the upper surface of the mounting plate arranged in the case, into which the holding frame on the upper surface of the case is inserted, and a battery storage recess is formed on the lower surface of the mounting plate, and the battery is stored in the buzzer storage recess. Since the periphery of the piezoelectric buzzer is sandwiched between the lower end of the holding frame and the periphery of the bottom of the buzzer storage recess, the piezoelectric buzzer and battery can be housed in one mounting plate, which not only makes it possible to make small electronic devices smaller and thinner. The number of parts can be reduced, and when the mounting plate with the piezoelectric buzzer attached is assembled into the case, the mounting plate can be easily positioned by inserting the ring-shaped holding frame formed on the case into the buzzer storage recess of the mounting plate. In addition, the piezoelectric buzzer can be fixed by sandwiching the peripheral portion of the piezoelectric buzzer between the lower end of the holding frame and the bottom of the buzzer storage recess.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a portable electronic watch according to this invention, Fig. 2 is an exploded perspective view of its main parts, Fig. 3 is a cross-sectional view of the assembled state of Fig. 2, and Fig. 4 is a third
FIG. 3 is a cross-sectional view of the lid shown in the figure in an open state. 1... Case, 2... Frame, 9... Piezoelectric buzzer, 10... Mounting plate, 14... Buzzer storage section, 15
...Lithium battery, 16...Battery storage section.

Claims (1)

[Claims for Utility Model Registration] A case having a plurality of sound emitting holes provided on the upper surface thereof and an annular holding frame projecting downward to surround the sound emitting holes and below the plurality of sound emitting holes. a case having a lower surface provided with an opening for inserting a battery; a buzzer housing recess formed in the upper surface of the case and into which the annular holding frame is inserted; a mounting plate in which a battery storage recess is formed to accommodate a battery corresponding to an opening on the bottom surface of the case; a lower end of a holding frame that is stored in the buzzer storage recess of the mounting plate and has an annular periphery; and the buzzer storage recess. A component mounting structure for a small electronic device, comprising: a piezoelectric buzzer held between a peripheral portion of a bottom surface; and a battery cover detachably attached to an opening on the bottom surface of the case.