JP3842896B2 - Board connection spring arrangement structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a board connection spring arrangement structure used in a timepiece module.
[0002]
[Prior art]
A circuit board is disposed on one side of the circuit support base, the battery is stored in a recess formed on the opposite side of the circuit support base, and is electrically connected to at least one electrode of the battery and electrically connected to the circuit board. A watch module having a metal plate is manufactured.
[0003]
1 is a front view of the timepiece module, FIG. 2 is a rear view, and FIG. 3 is a right side view of the rear view. The liquid crystal display device 1 is used for the display unit. A circuit board 3 under the liquid crystal cell support frame 2 incorporating the liquid crystal display device 1, a circuit support base 4 under the circuit board 3, and a metal plate 5 under the structure (in the figure, upside down). However, the hooks 5 a, 5 b, 5 c, 5 d provided on the metal plate 5 are engaged with the protrusions 2 a, 2 b, 2 c, 2 d provided on the outer peripheral side surface of the liquid crystal cell support frame 2 so that the whole is integrated. Yes. On the lower surface side of the circuit support 4, a recess 4 a for storing the battery 6 is formed.
[0004]
4 is a bottom view of the metal plate, and FIG. 5 is a side view. In the hole 5e in which the battery 6 is accommodated, a spring part 5f that contacts the side surface of the accommodated battery 6 is formed. The metal plate 5 has a board connection spring 5g for establishing conduction with a pattern (not shown) formed on the circuit board 3 so that the tip of the board connection spring enters between the upper surface of the battery 6 and the circuit board 3. It is integrally formed.
[0005]
FIG. 6 is a top view of the circuit support base, and FIG. 7 is a cross-sectional view taken along line AA with the battery mounted.
[0006]
FIG. 8 is a cross-sectional view showing a state before and after the board connection spring is assembled. The liquid crystal cell support frame 2, the circuit board 3, and the circuit support base 4 are stacked and assembled integrally with the metal plate 5. The free state of the board connection spring 5g before assembly is the state indicated by the dotted line in the figure. When the board connection spring 5g is assembled, the board connection spring 5g is brought into contact with the circuit board 3 and pushed up to be in a state after installation. Thereafter, the battery 6 is assembled. A spring portion 5f formed on the metal plate 5 is in contact with the side surface of the electrode of the battery 6 by a spring force. Since the tip of the board connection spring 5g is pressed against the pattern (not shown) of the circuit board 3 by a spring force, the continuity between one electrode of the battery 6 and the pattern of the circuit board 3 is the spring part 5f, the metal plate, and the board. Secured via connection spring.
[0007]
[Problems to be solved by the invention]
When an impact in the vertical direction (dropping, wearing on the wrist, clapping, etc.) is applied to the watch module, the board connection spring 5g may be bent and may be momentarily separated from the pattern of the circuit board 3. By leaving, the power is instantaneously turned off.
[0008]
If the gap between the tip of the substrate connection spring 5g and the lower surface of the battery 6 is small, there is a possibility of short-circuiting at the time of impact. If the gap is increased, the timepiece module becomes thicker, and if the gap is reduced, the above-mentioned drawback occurs. In addition, there is a disadvantage that tolerance for variation in parts processing is reduced.
[0009]
[Means for Solving the Problems]
A circuit board is disposed on one side of the circuit support base , the battery is housed in a battery receiving portion on the lower surface of the recess formed on the opposite surface of the circuit support base, and is electrically connected to at least one electrode of the battery and the circuit board A timepiece module having a metal plate electrically connected to the metal plate is provided with a board connection spring as means for electrically connecting to the circuit board of the metal plate, and a tip of the board connection spring is provided between the battery and the circuit board. Further, a part of the battery receiving portion on the lower surface of the recess formed in the circuit support base is interposed between the tip of the board connection spring and the battery.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 9 is a cross-sectional view showing an embodiment of the present invention. The battery receiving portion 4b on the lower surface of the recess 4a of the circuit support base 4 is provided with a flange 4c, and the flange 4c is located at a portion interposed between the lower surface of the battery 6 and the tip of the substrate connection spring 5g. . The tip of the flange 4c is set at a position that does not reach the position (two-dot chain line in the figure) where the tip of the board connection spring 5g when assembled is in a free state.
[0011]
The liquid crystal cell support frame 2, the circuit board 3, and the circuit support base 4 are stacked and assembled integrally with the metal plate 5 as in the prior art. The tip of the board connection spring 5g is pushed up when it comes into contact with the circuit board 3, and is assembled so as to slide between the circuit board 3 and the flange 4c.
[0012]
【The invention's effect】
Since a saddle was provided between the battery and the tip of the board connection spring using a circuit support, it was possible to prevent a short circuit between the battery and the board connection spring. This is a partial change of the circuit support base, eliminating the need for separate parts and eliminating the shortcomings.
[0013]
Since a hook is interposed and the tip of the board connection spring is slid between the circuit board and the hook, the lift of the spring at the time of impact can be extremely reduced or eliminated.
[Brief description of the drawings]
1 is a front view of a watch module. FIG. 2 is a rear view of the watch module. FIG. 3 is a side view of FIG. 2. FIG. 4 is a bottom view of a metal plate. FIG. 7 is a cross-sectional view taken along the line AA with the battery installed. FIG. 8 is a cross-sectional view showing a state before and after the board connection spring is assembled. FIG. Sectional view showing the state before and after assembly [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Liquid crystal display device 2 Liquid crystal cell support frame 2a Protrusion 2b Protrusion 2c Protrusion 2d Protrusion 3 Circuit board 4 Circuit support stand 4a Recess 4b Battery receiving part 4c 庇 5 Metal plate 5a Hook 5b Hook 5c Hook 5d Hook 5e Hole 5f Spring part 5g Substrate connection spring 6 Battery

Claims (1)

A circuit board is disposed on one side of the circuit support base , the battery is housed in a battery receiving portion on the lower surface of the recess formed on the opposite surface of the circuit support base, and is electrically connected to at least one electrode of the battery and the circuit board A timepiece module having a metal plate electrically connected to the metal plate is provided with a board connection spring as means for electrically connecting to the circuit board of the metal plate, and a tip of the board connection spring is provided between the battery and the circuit board. And a part of the battery receiving part on the lower surface of the recess formed in the circuit support base is interposed between the tip of the board connection spring and the battery. Connection spring arrangement structure.

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