JPS6136334B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes push buttons 1a and 1b protruding from the case 4 on the outside at both ends, and feed claws 2a and 2b on the inside at both ends.
The swinging rods 3, each of which is provided with a dial, are supported on one side of the case 4, the dial plate 6 is fixed on the circumferential body of the ratchet wheel 7, and the ratchet wheel 7 with the dial plate 6 fixed on the circumferential body is fixed. The swinging rod 3 is supported on a support shaft 5 in the center of the case 4.
The feed pawls 2a and 2b of the ratchet 7 are interlockably opposed to both sides of the ratchet 7, and a push spring 8 is pressed against the ratchet 7 so that the ratchet 7 clicks in either the forward or reverse direction. 3, feed claw 2a, 2
b relates to a digital switch characterized in that b is provided with means for returning to a neutral position that does not engage with either side of the ratchet wheel 7, and its purpose is to move the dial in either the addition direction or the subtraction direction. It also provides a digital switch that can be rotated.

The present invention will be explained in detail below based on the illustrated embodiments. As shown in FIGS. 2 and 3, there is a character window 9 on one side wall of the case 4, and buttonholes 10a and 1 with the character window 9 in between.
0b is provided. Inside the case 4, a swinging rod shaft 11, a support shaft 5, and a spring stop projection 12 are provided. The swinging rod 3 is supported by a swinging rod shaft 11, and push buttons 1a and 1b on the outside of both ends of the swinging rod 3 are supported.
are projected outward from the button holes 10a and 10b, respectively. Return springs 13a and 13b are suspended from the feed claws 2a and 2b of the swinging rod 3, respectively. And these return springs 13a, 13b
This serves as a means for returning the feed pawls 2a, 2b to a neutral position in which they do not engage with either side of the ratchet wheel 7.
The ratchet wheel 7 is fixed to the central part of the back side of the dial plate 6 (that is, the dial plate 6 is fixed to the circumferential body of the ratchet wheel 7), and is supported by the support shaft 5 of the case 4, so that the swinging rod It is positioned between two feed claws 2a and 2b of No.3. The push spring 8 is supported by the spring retaining protrusions 12, 12 of the case 4, and a chevron-shaped pushing bending portion 14 at the tip pushes the ratchet wheel 7 to clickly rotate the ratchet wheel 7 in either the forward or reverse direction. I'm starting to do that.

As shown in FIG. 1, a plurality of the digital switches are mounted one after the other inside the outer cover 15 and used as a digital timer, digital counter, etc., and their operation is as follows.

Operation 1 Pushing in one push button (FIG. 4a) For example, when the right push button 1a is pushed in, the entire swinging rod 3 begins to rotate clockwise around the swinging rod support shaft 11. Next, the feed pawl 2a at the tip of the pushed button 1a hits the ratchet wheel 7, causing the ratchet wheel 7 to rotate clockwise. The ratchet wheel 7 presses the push spring 8 downward while rotating under the force of the feed pawl 2a. When the feed pawl 2a reaches the ratchet wheel 7, the other feed pawl 2a
b has escaped outside the tooth tip circle of the ratchet wheel 7.

Operation 2 Push the push button all the way down and then release it (b in the same figure). When the push button 1a is pushed all the way down, the ratchet wheel 7
For convenience, the teeth marked with black circles have rotated beyond the pass (inflection point) of the pressing bending portion 14 of the pressing spring 8, and therefore receive a further clockwise rotation force due to the spring force.
On the other hand, the swinging rod 3 that has lost its operating force is the return spring 13
It tries to return to its original equilibrium state by receiving the force of counterclockwise rotation due to a.

Operation 3: State before operation (FIG. 3c) The swinging rod 3 returns to the center position by the force of the return spring 13a, and the ratchet wheel 7 rotates clockwise and comes to rest at the position where it is locked by the push spring 8. With this one action,
This means that the ratchet wheel 7 has advanced by one pitch, and the dial 6 is thereby advanced by one frame.

Operation 4 Reverse rotation If you press the left push button 1a in the opposite direction,
The ratchet wheel 7 is rotated to the left by the left feed pawl 2b. Then, the dial 6 is rotated one pitch to the left beyond the inflection point of the push spring 8, and the dial 6 is returned one frame.

FIG. 5 shows another embodiment. In this embodiment, elastic pieces extending from both ends of the swinging rod 3 are used as return springs 13a and 13b, and these are locked to stoppers 16a and 16b on both sides of the case 4, so that the swinging rod 3 is always balanced. The state is maintained, and the same operation as in the above embodiment can be performed.

As described above, the present invention includes a swinging rod having a push button protruding from the case on the outside at both ends and a feed claw on the inside at both ends, supported on one side inside the case, and a dial mounted on the drum of the ratchet wheel. A ratchet wheel with a dial fixed on the circumferential body is supported on a support shaft in the center of the case, and the feed pawls of the swinging rod are opposed to each other so that they can engage with both sides of the ratchet wheel, and the ratchet wheel is oscillated. The rod is equipped with a means for returning to the neutral position where the feed pawl does not engage with either side of the ratchet wheel, so by pressing either push button on the swing rod, the feed pawl can move the ratchet wheel forward or backward. Also, since a push spring is pressed against the ratchet wheel to cause the ratchet wheel to clickly rotate, the ratchet wheel can be rotated one pitch in either the forward or reverse direction by operating the push button mentioned above. It can be rotated by clicking, and as a result, the main dial, which is integrated with the ratchet wheel, can be rotated one frame at a time in either the addition direction or the subtraction direction.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. 2 is a front view of the mechanism inside the case, Fig. 3 is an exploded perspective view of the same, and Fig. 4 a, b, and c are the functions of the same. The explanatory diagram, FIG. 5, is a front view of a mechanism inside the case of another embodiment. In the figure, 1a and 1b are push buttons, 2a and 2b are feed claws, 3 is a swinging rod, 4 is a case, 5 is a spindle, 6 is a dial, 7 is a ratchet wheel, and 8 is a push spring.

Claims (1)

[Claims] 1 Push buttons protruding from the case on both ends,
A swinging rod with feed pawls provided on the inside of both ends is supported on one side of the case, a dial is fixed on the circumferential body of the ratchet wheel, and the ratchet wheel with the dial fixed on the circumferential body is attached to the case. The feed pawl of the swinging rod is supported on a support shaft in the center of the ratchet, and the feed claws of the rocking rod are opposed to each other so that they can engage with both sides of the ratchet, and a push spring is attached to the ratchet, so that the ratchet can be rotated by clicking in either the forward or reverse direction. A digital switch characterized in that the swinging rod is provided with means for returning the feed pawl to a neutral position in which the feed pawl does not engage with either side of the ratchet wheel.