JPH0119295Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a digital stopwatch. It is preferable that the stop watch is operated by arranging a push button on the side of the periphery and pushing the button. On the other hand, consider that the circuit board that controls the digital display receives the operation of a push button that operates parallel to the digital display surface and converts it into an electrical signal on the circuit board. Conventionally, side processing was done by transferring a pad to the side of the circuit board or soldering a U-shaped metal lead to the side of the circuit board, and the operation of the push button was made to collide with this. There were many formats. These have problems in terms of manufacturing cost, contact reliability, and even drop impact.

The present invention consists of a rotary lever that rotates in response to the linear movement of the push button, a conductive pattern divided into two planes rather than the side of the circuit board, and the rotary lever presses the conductive rubber of the rubber switch to connect the divided conductive pattern. An attempt is made to solve the above problem by adopting an electric signal for stopwatch operation. This will be explained below using the drawings.

FIG. 1 is a sectional view according to the present invention. FIG. 2 is a partial sectional view of FIG. 1. 1 is the back cover, 2 is the case, 3 is the bush that is sandwiched between 1 and 2, 4 is the cover glass, and 5 is the mechanical block, in this case, the liquid crystal cell, etc. are installed. Reference numeral 6 denotes a circuit board for displaying a liquid crystal cell or the like, which is held by the mechanical block 5 so as to be parallel to the display surface. 7 is a straight lever with a push button 8 fitted at its end.
Reference numeral 7-1 is a cylindrical portion that slides in the straight direction along the bush 3 of the straight lever 7. Reference numeral 5-1 denotes a gate integrally molded with the mechanism block 5, and the straight lever 7 is fitted and supported in a square hole penetrated through the gate 5-1 so as to slide in the straight direction. 18 is a rotating lever. 9-1 in Fig. 2 is the rotating lever 18
A rotary lever 18 is supported in a support hole 5-2 provided in the mechanism block 5 so as to freely rotate. Reference numeral 11 in FIG. 1 is a return spring made of metal, which is inserted into a slit 7-2 provided in the straight lever 7 from above.
In FIG. 2, the arm 9-4 of the rotary lever 18 is elastically deformed inward and the rotary lever 1 is inserted into the support hole 5-2.
8 is shown as being assembled.

The rotary lever 18 performs the following movements. The return spring 11 exerts a force on the straight lever 7 in the direction of the arrow 12. Under normal conditions, the rotary lever 18 receives the return force of the rubber switch 17 and is stable in the up position shown in FIG. When the user presses the push button in the direction of arrow 13, the straight lever 7 slides in the direction of arrow 13 against the force of the return spring 11. At this time, the resistance force of the return spring 11 reaches its peak during the sliding process, and the movement feels like a snap. Arrow 1
The sliding movement in three directions is performed by the end 7- of the straight lever 7.
3 comes into contact with the end 9-2 of the rotary lever 18 and presses it, causing the rotary lever 18 to rotate at high speed in the direction of the arrow 14. The operating end 19 of the rotary lever is indicated by arrow 1
It operates by converting pushes in three directions to right angles. The arrow 13 is parallel to the circuit board 6, but the operating end 19 of the rotary lever is intended to move substantially perpendicularly toward the circuit board 6. Facing the operating end 19, the circuit board 6 has a divided conductive pattern 6-1 in its plane.
It is equipped with Starting, stopping, resetting, etc. of the stopwatch are performed by conducting the divided conductive pattern 6-1 and applying an electric signal to the circuit constituting the stopwatch. The present invention utilizes conductive rubber for this continuity. 17 is a rubber switch having a conductive rubber 10 held on the circuit board 6, 18 is a rotary lever, and 19 is an operating end of the rotary lever.

FIG. 1 shows a normal state in which the conductive rubber 10 is not pressed, and the conductive rubber 10 is positioned away from the divided conductive pattern 6-1. When the straight lever 7 is pushed in the direction of arrow 13 from this state, the end 7-3 pushes the rotary lever 18, and the operating end 19 of the rotary lever moves in the direction of arrow 14, pushing the rubber switch 17 and deforming it. Rubber switch 17
The conductive rubber 10 integral with the is pressed to conduct the divided conductive patterns 6-1 of the circuit board. Next, when the user releases the push operation, the straight lever 7 returns to the spring 1.
1 in the direction of arrow 15. At the same time, the rotating lever 18 is pushed back in the direction of the arrow 20 by the restoring force of the rubber switch 17 and returns to its original position. When pushing, the stepped portion 2 provided on the straight lever 7
1 collides with the wall 22 of the mechanism block 5 and absorbs the shock there, making the structure safe and highly accurate in stroke and operation. 23 is an upper polarizing plate, 24 is an upper glass, 25 is a lower glass, and 26 is a connector.

FIG. 3 is a sectional view showing a second embodiment of the present invention, in which a rubber switch 17 is attached to the display side. The rubber switch 17 is assembled and positioned so as to fall into a recess 27 provided in the mechanism block 5, and is fixed between the circuit board 6 and the periphery of the recess 27. Mechanism block 5 has indicators 23, 2
The second embodiment is characterized in that it has an integral structure that supports the rubber switches 4, 25, 26, etc. and the rubber switch 17 at the same time.

As shown in the above embodiments, the present invention has a mechanism consisting of a rotary lever, etc., which converts the linear motion caused by pushing from the side of the stopwatch into a rotary motion, and the operating end of the rotary lever is approximately perpendicular to the circuit board. the circuit board has a split conductive pattern facing the working end of the rotary lever; and a rubber switch having conductive rubber is held on the circuit board between the rotary lever and the split conductive pattern. The push operation from the side presses the conductive rubber, and the conductive rubber conducts the divided conductive patterns, thereby operating the stopwatch.

From the above explanation, the effects of the present invention are as follows.

(1) Since it uses a rotating lever, it was easy to convert from straight travel to rotation.

(2) Since the conductive pattern is divided within the plane of the circuit board, manufacturing is easier compared to conventional side surface processing.

(3) A rubber switch with conductive rubber is held between the rotary lever and the divided conductive pattern, and this is pressed to make the divided conductive pattern conductive, thereby increasing the reliability of the contact.

Furthermore, as in the past, when a metal piece collides with a divided conductive pattern at high speed, the pattern or metal piece is damaged and the contact performance deteriorates, but this problem has been solved by using conductive rubber. Furthermore, the conductive rubber has appropriate elasticity, and in the process of denaturation, it connects reliably across the divided conductive patterns, so there is no possibility of operational errors. Furthermore, since the conductive rubber is sticky, the contacts will not jump and cause chattering. Also, this elasticity allows for wide tolerances in the mechanical dimensions of the contact stroke, making it easy to manufacture. Furthermore, the pushbutton of the stopwatch protrudes considerably from the side of the case, so if you accidentally drop it during operation, the pushbutton is likely to hit the floor, and excessive force from the floor will act to push the pushbutton. Even if this happens, the conductive rubber acts as a cushion and can prevent damage to the circuit board, etc.

It is in.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a first embodiment of the present invention;
2 is a sectional view of the main part of FIG. 1, and FIG. 3 is a sectional view of a second embodiment of the present invention. 6... Circuit board, 6-1... Divided conductive pattern, 10... Conductive rubber, 17... Rubber switch,
18... Rotating lever, 19... Operating end of the rotating lever.

Claims (1)

[Scope of utility model registration request] A digital stopwatch is equipped with a push button arranged on the peripheral side and a circuit board parallel to the digital display, and the direction of the push is parallel to the circuit board.The digital stop watch is equipped with a rotary lever that rotates in response to the linear movement of the push button. that the movement of the working end of the rotary lever is in a substantially perpendicular direction toward the circuit board; and that there is a divided conductive pattern in the plane of the circuit board facing the working end of the rotary lever. , the conductive rubber contact of the rubber switch is held on the divided conductive pattern, the conductive rubber is positioned away from the divided conductive pattern in the unpressed state, and the pressed state The digital stop watch is characterized in that the operating end of the rotary lever presses the conductive rubber toward the divided conductive pattern, and the conductive rubber conducts the divided conductive pattern.