JPS6244385Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a mounting structure for an electrical connection member that electrically connects a circuit board and connected objects stacked on the circuit board.

Recently, watches with an alarm function have been commercialized in which a piezoelectric element is attached to the inner surface of the back cover, and a voltage is applied to the piezoelectric element to cause the back cover to vibrate and generate a sound. In such wristwatches, a coil spring is used to electrically connect the terminals of the circuit board and the electrodes of the piezoelectric element, and this coil spring is bored in the housing to which the circuit board and electronic components are attached. The coil spring is fitted into the hole, and one end of the coil spring is brought into elastic contact with the terminal of the circuit board, and the other end is brought into elastic contact with the electrode of the piezoelectric element on the inner surface of the back cover, thereby electrically connecting the two.

However, with this connection structure, the coil spring is simply fitted into the hole in the housing, so the coil spring is not retained in the watch module state, and the coil spring may come off during the assembly process, making assembly work easier. It's bad.

Also, instead of a coil spring, a connecting member made of a metal plate is used, and this connecting member is fixed to the housing with screws so that one end contacts the connection terminal of the circuit board and the other end contacts the connected member. It is conceivable to fix the circuit board by using screws, but installation is troublesome if it is fixed by screws, and installation is easy if it is fixed by engagement. When attaching the back cover, force is applied from below, so the engaging part may come off during the assembly process, or it may wobble and become misaligned, making it impossible to make good contact with the connection terminal of the circuit board or the electrode of the piezoelectric element. .

In view of the above circumstances, an object of the present invention is to provide a mounting structure for an electrical connection member that electrically connects a circuit board attached to one side of a housing and a connected object arranged on the other side of the housing. Therefore, it is an object of the present invention to provide a mounting structure for an electrical connection member that can be easily and reliably mounted to a housing, and can also make good contact with a circuit board or an object to be connected.

This invention will be explained below with reference to the drawings.

In Fig. 1, 1 in the figure is a watch case;
A watch glass 2 is fitted into the upper opening of this watch case 1, and a back cover 3 is attached to the lower opening. Further, 4 is a watch module housed in the watch case 1, and this module 4 holds a circuit board 6 between an upper housing 5a and a lower housing 5b. The upper housing 5a accommodates a display panel 7 and an interconnector 8 that electrically connects display panel connection terminals (not shown) of the display panel 7 and the circuit board 6. Further, a battery 8 is attached to the lower housing 5b by a battery holding member 10 such that one pole contacts the battery connection terminal 9 of the circuit board 6. Holding member 1
0 is the + side electrode terminal, and this holding member 1
0 is electrically connected to the circuit board 6, and one end 10a of the holding member 10 is bent downward and brought into contact with the back cover 3, making the back cover 3 a reference potential. Further, an electrical connection member 11, the details of which will be described later, is attached to the lower housing 5b.

On the other hand, a piezoelectric element 13 is attached to the inner surface of the back cover 3. The piezoelectric element 13 has electrodes on its upper and lower surfaces,
The electrode on the lower surface is attached to the inner surface of the back cover 3 with a conductive adhesive, and is set to the same reference potential as the back cover 3. Further, the electrode on the top surface of the piezoelectric element 13 is electrically connected to the connection terminal 12 of the circuit board 6 by an electrical connection member 11, and is connected to the piezoelectric element 13 from the connection terminal 12 of the circuit board 6 via the electrical connection member 11. It is adapted to supply a drive signal.

Next, the electrical connection member 11 and its mounting portion will be explained in detail with reference to FIGS. 2 to 4.

The connecting member 11 is integrally formed of a thin metal plate, and includes a base 21, an elastic engagement portion 22 bent in a U-shape at one end of the base 21, and
A first terminal portion 23 extends from the center of the other end of the base 21 and is bent upward, and has a contact portion at its tip; and a first terminal portion 23 extends from both sides of the other end of the base 21 and is bent downward. and a second terminal portion 24 connected at the tip.

On the other hand, the lower housing 5b has an upper recess 2 in which the first terminal portion 23 of the connecting member 11 is arranged.
5 is formed with a lower recess 26 in which the base 21 and the second terminal part 24 are arranged. An engagement hole 27 is formed at one side edge of the lower recess 26 of the lower housing 5b to which the engagement portion 22 is engaged. A locking portion 27a that locks the tip is provided. Further, an insertion hole 29 through which the first terminal portion 23 is inserted is formed in the lower recess 26 on the side opposite to the engagement hole 27 by narrowing the support portion 28 on which the base 21 is supported, and extends through the upper recess 25 . is formed.

Next, this connecting member 11 is connected to the lower housing 5b.
The case of attaching the device to the device will be explained using FIGS. 5 to 7.

First, as shown in FIG. 5, the first terminal part 23 of the connecting member 11 is inserted into the insertion hole 29 from the lower side of the lower housing 5b and taken out upward, and the engaging part 22 is engaged with the engaging hole 27. . Then, as shown in FIG. 6, the base 21 is held by the support part 28, the tip of the engaging part 22 is locked by the locking part 27a, and the lower surface of the first terminal part 23 is held in the insertion hole 29. Edge 29
It is brought into contact with a. When the circuit board 6 is mounted on the upper side of the lower housing 5b as shown in FIG.
The terminal portion 23 of is deformed. However, since the back surface of the first terminal portion 23 contacts the edge 29a of the insertion hole 29 and the base portion 21 is supported by the support portion 28, the connection member 11 is stably held.
Then, the upper housing 5a, display panel 7, etc. are further attached to the lower housing 5b to assemble the watch module 4. Then, this watch module 4 is stored in the watch case 1, and the back cover 3 is attached. In this situation, as shown in Figure 3,
Electrode of piezoelectric element 13 of back cover 3 and second terminal portion 24
are in contact with each other, and the second terminal portion 24 is further pressed upward. However, since the base portion 21 of the connecting member 11 is supported by the support portion 28 and the tip of the engaging portion 22 is locked by the locking portion 27a, the connecting member 11 is stably held without moving. .

Therefore, the electrical connection member 11 of the present invention can be fixed simply by engaging the engagement portion 22 with the engagement hole 27 of the lower housing 5b, so that the connection member 11 can be easily attached. In addition, the lower housing 5b
When the circuit board 6 is attached to the circuit board 6, a downward force is applied to the first contact part 23, but the back surface of the first contact part 23 is in contact with the edge 29a of the insertion hole 29, and the board 21 is Since it is supported by the support part 28, when the circuit board 6 is attached, the connection member 11
The engaging portion 22 will not come off from the engaging hole 27 or wobble. Further, when attaching the back cover 3, an upward force is applied to the second contact portion 24, but the board 21 is supported by the support portion 28 and the tip of the engagement portion 22 is held by the locking portion 27a. Since it is supported, when the back cover 3 is attached, the holding member 11 is securely fixed without wobbling, and the contact between the connection terminal 12 of the circuit board 6 and the first contact part 23 and the piezoelectric Electrode of element 13 and second contact part 2
4 can be maintained in good condition.

In addition, in the above embodiment, the piezoelectric element 13 has the connecting member 11 of the present invention attached to the circuit board 6 and the inner surface of the back cover 3.
Although it is used for electrical connection with
The present invention can be applied to electrically connect a circuit board and objects to be connected arranged in a layered structure on the circuit board, such as connection with a piezoelectric element provided on the inner surface of a watch glass.

Further, the present invention can be widely applied not only to wristwatches but also to small electronic devices.

As explained above, according to the electrical connection member mounting structure of the present invention, although the electrical connection member can be easily installed, the connection member can be stably held, and the housing to which the connection member is attached can The connecting member does not wobble or come off before or after being assembled into the case, and the assembly work is easy and a good contact condition can be obtained.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Fig. 1 is a longitudinal sectional view showing an electronic wristwatch using the electrical connection member of the present invention, and Fig. 2 is a partially cutaway exploded view of the electrical connection member and its mounting part. 3 is an enlarged sectional view of the main part of FIG. 1, FIG. 4 is a view from the bottom of the housing with the electrical connection member attached to the housing, and FIGS. 5 to 7 are electrical It is a figure for explaining the attachment procedure of a connection member. 3...Back cover, 4...Watch module, 5b...
Lower housing, 6... Circuit board, 11... Connection member, 13... Piezoelectric element, 21... Base, 22...
...Engaging part, 23...First terminal part, 24...Second
Terminal part, 27...Engagement hole, 28...Support part, 2
9...Insertion hole.

Claims (1)

[Claims for Utility Model Registration] An electrical connection member for attaching to the housing an electrical connection member that electrically connects a circuit board attached to one side of the housing and an object to be connected arranged on the other side of the housing. The connection member mounting structure includes: an engagement hole and an insertion hole formed in the housing with a support portion sandwiched therebetween; a locking portion protruding from the engagement hole on a side opposite to the support portion; A protruding edge is formed on a wall opposite to the support part in the insertion hole, and the electrical connection member includes a base part that comes into contact with the other surface of the support part of the housing, and an edge part approximately extending from one end of the base part. an engaging portion that is bent into a U-shape and that engages with the engaging hole of the housing and whose tip is locked with the locking portion; and an engaging portion that extends from the other end of the base toward the one surface side. a first terminal portion which is inserted through the insertion hole of the housing and comes into elastic contact with the connection terminal of the circuit board, and whose back surface abuts an edge of the insertion hole; A mounting structure for an electrical connection member, comprising a second terminal portion that is formed to extend and comes into elastic contact with the object to be connected.