JPS6215831B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic timepiece module using a liquid crystal display element, an LED display element, or the like.

Generally, the module of an electronic watch has a three-layer structure. In other words, there is a module frame to which a display device such as a liquid crystal display board or an LED display board is attached, a board to which a large-scale integrated circuit (LSI) and a crystal resonator, etc. that make up a clock circuit are fixed, and this board is assembled into a module frame. It consisted of a back cover that was fixed to the Yule frame, and the back cover was screwed to the module frame. The back cover was also made of synthetic resin, similar to the module frame, to prevent short circuits between the case cover and the electrodes on the circuit board when the module was attached to the case. Therefore, since the back cover is secured with screws, it takes time to assemble it, resulting in poor productivity.Furthermore, since the back cover is made of synthetic resin, there is a limit to how thin it can be made.

SUMMARY OF THE INVENTION An object of the present invention is to provide a module for an electronic timepiece that eliminates the drawbacks of the prior art, is easy to assemble, and can be made thin. The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective assembly view showing an embodiment of the present invention.

In this embodiment, reference numeral 1 denotes a module frame made of synthetic resin, which is provided with a battery storage section 2 and a crystal resonator storage section 3, and further includes a module frame 1 for mounting a liquid crystal display board. A space 4 passing through the space 4 and a groove 5 into which a connector to be connected to the electrode of the liquid crystal display board is inserted are provided. 6 is a substrate, on one side of which a large-scale integrated circuit forming a clock circuit, a crystal oscillator, a trimmer capacitor, etc. are fixed, conductive paths for wiring these are provided on both sides, and on the other side. An electrode 7 is provided for supplying one power source to the circuit. 8 is an insulating film, and a window 9 is provided corresponding to the electrode 7 of the substrate 6. Reference numeral 10 denotes a board holding fitting having spring properties, and has four arms 1 bent at right angles.
1, each arm 11 has a hole 12 formed therein, and the board holding fitting 10 has a notch 1 corresponding to the battery storage part 2 provided in the module frame 1.
9 is provided, and a terminal 13 is provided from the cutout portion 19 to be connected to the electrode of the battery, and a tongue piece 14 that comes into contact with the electrode 7 of the substrate 6 is provided.

When assembling the module in the above configuration,
Module frame 1, substrate 6, insulation film 8
They are placed in this order, and finally they are fixed with the board holding fittings 10. An electrode 15 that serves as a switch for correction or display switching is provided on the side of the module frame 1, and this electrode 15 is bent at a right angle so that one bent side is on the substrate 6 side of the module frame 1. It is provided by being inserted into a groove of the module frame 1, and by placing the board 6 on it, connection is made with the switch electrode 16 provided on the board 6. Further, the board holding fitting 10 is fixed by forming a triangular protrusion 17 on the side surface of the module frame 1 corresponding to the arm 11.
It is fixed by hooking the hole 12 of No. 1. At this time, since the protruding portion 17 is triangular and inclined, the arm 11 is pressed by pressing the board holding fitting 10 from above.
The hole 12 widens and automatically catches the protrusion 17. Therefore, it can be fixed very easily without the need for screws.

Further, the board holding fitting 10 is insulated from the conductive paths of the board 6 by the insulating film 8, and only the window 9 provided in the insulating film 8 connects the electrode 7 of the board 6 and the tongue piece of the board holding fitting 10. 14 is connected,
Furthermore, the voltage of one of the batteries is supplied to the circuit of the board 6 so that the terminal 13 connected to the battery electrode provided on the board holding fixture 10 extends into the battery storage section 2 .

When the assembled module is attached to a metal case (not shown), the board holding fitting 10 is connected to the back cover of the case, and the potential of the case is set to the board holding fitting 1.
0, and the switch operation is performed by the movable rod provided in the case coming into contact with the electrode 15 of the switch.

In this way, the board holding fixture 10 has multiple functions, not only for simply fixing the board 6 but also for supplying battery voltage to the circuit and case. Therefore, the parts for this can be omitted,
Assembly is also easy.

FIG. 2 is a perspective assembly view showing another embodiment of the present invention, and the same parts as those in FIG. 1 are given the same numbers and their explanation will be omitted.

The feature of this embodiment is that a contact piece 18 is provided on the substrate holding fitting 10 so as to extend near the switch electrode 15 provided on the side surface of the module frame 1. The contact piece 18 is substantially perpendicular to the board holding fitting 10 and has spring properties. Normally, the contact piece 18 pushes out a movable rod provided in a case (not shown) while keeping a distance from the electrode 15 of the switch. When the movable rod is operated and pressed, the contact piece 18 connects to the electrode 1 of the switch.
5, the potential of the electrode 15 is the same as the substrate holding metal fitting 10.
, and the board holding fitting 10 is the same as the terminal 13.
The switch operation is performed because the terminal is connected to one electrode of the battery depending on the terminal.

By providing the contact pieces 18 on the board holding fixture 10 in this way, even if the case is an insulating material, such as a plastic case, it can be used without providing a conductive path, and the contact pieces 18 can be used with springs. Because of its flexibility, it is possible to omit the coil spring provided on the movable rod of the case, reducing the number of parts and greatly simplifying assembly.

As described above, according to the present invention, the board holding fixture is provided with an arm having a hole and is hooked onto the protruding part of the module frame, thereby making it possible to fix the board very easily without using screws. In addition, by providing various electrical contact pieces on the board holding bracket, the number of parts is greatly increased, simplifying assembly and reducing time. At the same time, clock operation can be tested using only the assembled module. Productivity improves. Furthermore, since the board holding bracket is made of a thin elastic metal plate, the overall thickness of the module is
It has the advantage that a thin electronic watch can be obtained, as it is determined only by the thickness of the module frame and the substrate.

[Brief explanation of the drawing]

FIG. 1 is a perspective assembly view showing an embodiment of the invention, and FIG. 2 is a perspective assembly view showing another embodiment of the invention. 1...Module frame, 2...Battery compartment, 6
... Substrate, 7... Electrode, 8... Insulating film, 9... Window,
10... Board holding fitting, 11... Arm, 12... Hole, 13
...terminal, 14...tongue, 15...switch electrode, 17
...Protrusion part, 18...Switch contact piece, 19...Notch part.

Claims (1)

[Claims] 1 comprises a module frame, a board on which a clock circuit, etc. is formed, and a board holding fitting that fixes the board to the module frame, the board holding fitting is bent at a substantially right angle, and the side surface of the module frame is bent. a plurality of arms each having a hole to be hooked to a triangular protrusion provided in the module frame; a notch provided in the module frame corresponding to the battery storage section; and one electrode of the battery. An insulator having a window provided at a position where an electrode provided on the substrate is selectively exposed is sandwiched between a terminal bent from the notch and the substrate at a position in contact with the terminal, A tongue piece provided at a position in contact with the electrode exposed in the window, and a tongue piece extending at a position in contact with a switch electrode provided on the side surface of the module frame and bent at a substantially right angle, when pressed from outside the module. A module for an electronic timepiece, comprising a switch contact piece that contacts the switch electrode.