JPS6334201Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wind-up timer that allows accurate time setting.

The wind-up timer that is commonly used in the past is
By rotating a cam attached to the main shaft that is linked to the rotating operation of the knob, the cam arm, which has fallen into the notch carved on the outer periphery of the cam, is lifted up to the outer periphery of the cam, and the contact point that follows the cam arm is raised. The timer is configured to start as soon as the cam arm is closed and the operator releases the operating knob, but the contact closes as soon as the cam arm is lifted from the cam notch, that is, immediately after the setting operation begins. As a result, if there is a delay in releasing the knob or if it takes time to operate, the contact may remain closed for a period of time outside the timer setting, especially when a short time limit setting is required. had the disadvantage of causing problems.

The object of the present invention is to fix a fixed cam having a convex part to a main shaft which uses a mainspring as a driving source and rotates at a constant rate. A floating cam with a notch carved in the cam is attached to the fixed cam via a spring so as to bias it in one direction, and the floating cam engages with the outer peripheral edge of the floating cam to operate a time contact and at the same time is connected to the clock mechanism. A cam lever is provided that moves into and out of contact with the impeller, and after setting a desired time period by rotating the main shaft, an operating rod is provided with a push button at one end and a conical engagement portion at the other end. Press and operate
To provide a timer that eliminates the above-described drawbacks of the conventional timer by sliding the cam lever along the slope of the conical engagement part to close the time contact and operate the clock mechanism. It is in.

An embodiment of the present invention will be described below based on the drawings. A main shaft 1 is rotatably supported by an upper machine frame 2 and a lower machine frame 3. Reference numeral 4 denotes a main gear that is slidably mounted in the middle of the main shaft 1 by a landing plate.A gear system (not shown) is connected to the main gear 4, and an engagement piece is provided at the final stage of the gear system. An impeller 5 with 5a is connected (FIG. 3). Reference numeral 6 denotes a mainspring attached to the main shaft 1. When the main shaft 1 is rotated in the direction of the arrow a shown in the figure, the mainspring 6 is wound, and the repulsive force of the mainspring 6 rotates the gear system, and the main shaft 1 is rotated at a constant speed in the direction of the arrow b. It is configured to rotate to. 7 is a fixed cam fixed to the upper end of the main shaft 1 and has a convex portion 8; 9 has a protrusion 10 that engages with the convex portion 8 of the fixed cam 7, and has a notch 11 carved in the periphery. A spring 12 having one end fixed to the fixed cam 7 and the other end fixed to the floating cam 9 is installed between the two cams 7 and 9 so as to bias the fixed cam 7 in one direction. There is. Reference numeral 13 denotes a cam lever whose one end is rotatably supported between the upper and lower machine frames 2 and 3. The cam lever 13 is formed into two stages, upper and lower, and a part in the middle of the upper stage engages with the outer peripheral edge of the floating cam 9. A mating engagement protrusion 14 is provided in a protruding manner, and the upper end portion 15 is formed with an engagement lever that slides and engages with an engagement portion 22 of a timer operating rod 20, which will be described later. Also, cam lever 1
A switch pressing portion 16 made of an insulating material is fixed to the middle of the lower stage of the blade 3, and a stopper piece 17 that engages and disengages from the engagement piece 5a of the impeller 5 is formed at one end. A switch S is composed of a movable contact piece 18 and a fixed contact piece 19, and is closed by the pressing action of the switch pressing portion 16 of the cam lever 13. The movable contact piece 18 is formed in a substantially U-shape, has appropriate elasticity, and constantly presses the cam lever 13 against the main shaft 1 via the switch pressing portion 16. Reference numeral 20 designates a timer operating rod having a push button 21 at one end and a conical engagement portion 22 whose peripheral edge is formed into an inclined surface at the other end. Engagement lever 1 at the extreme end
5 are configured to press into engagement with each other, and when the operating rod 20 is pressed, the engagement lever 15 engages with the conical engagement portion 22.
The cam lever 13 is formed to swing by sliding on the slope of the cam lever 13. Note that when the engagement lever 15 is located at the upper part of the circumferential surface of the engagement portion 22, the cam lever 13
The engaging protrusion 14 falls into the notch 11 of the floating cam 9, and the stopper piece 17 engages the engaging piece 5 of the impeller 5.
a, and when the engagement lever 15 is located at the lower part of the circumferential surface of the engagement portion 22, the cam lever 13
The engaging protrusion 14 is lifted up from the notch of the floating cam 9 to a height where it rides on the outer periphery of the cam, and the stopper piece 17 is separated from the engaging piece 5a of the impeller 5, and the movable contact piece 18 is pressed against the switch S. It is formed so that it closes.

Next, the operation of the above configuration will be explained.

1, 2, and 4, the timer is off, and the engaging protrusion 14 of the cam lever 13 is connected to the idler cam 9.
The stopper piece 17 locks the impeller 5 and the switch S is turned off. From this state, rotate the main shaft 1 in the direction of arrow a (180 degree winding in this example) to set the time length according to the scale plate (not shown) (5th
figure). At this time, only the fixed cam 7 rotates in conjunction with the main shaft 1, and the spring 12 installed between the fixed cam 7 and the floating cam 9 is wound and stores the force that urges the floating cam 9 to rotate in the direction of arrow a. Since the engaging protrusion 14 of the cam lever 13 is depressed into the notch 11 of the floating cam 9, the floating cam 9 does not rotate but is stopped. The mainspring 6 attached to the main shaft 1 is also wound, and the impeller 5 connected to the gear system is connected to the stopper piece 17.
Since the timer is locked, the timer does not operate. From this state, as shown in FIG. 6, if the push button 21 of the operating rod 20 is pushed in the direction of arrow c,
The engagement lever 15 of the cam lever 13 slides on the circumferential surface of the conical engagement part 22, pushes up the cam lever 13 in the direction of arrow d, and lifts the engagement part 14 to a height above the notch 11 of the floating cam 9 so that it rides on the outer periphery. .
At the same time, the floating cam 9 is rotated by the spring 12 in the direction of arrow a until the projection 10 comes into contact with the projection 8 of the fixed cam 7. Also, as the cam lever 13 moves in the direction of arrow d, the stopper piece 17
is detached from the impeller 5, the timer is activated, and the switch S is turned on. Thereafter, the main shaft 1 and the cams 7, 9 rotate at a constant speed in the direction of the arrow b, and after the set time has elapsed, the engagement protrusion 14 of the cam lever 13 falls into the notch 11 of the idler cam 9, and the switch S is turned off. The stopper piece 17 is the engagement piece 5 of the impeller 5
a is locked and the timer operation is stopped.

As described above, in the present invention, a fixed cam 7 having a convex part 8 is fixed to the main shaft 1 which uses a mainspring 6 as a driving source and rotates at a constant rate, and a protrusion that engages with the convex part 8 of the fixed cam 7. A floating cam 9 having a diameter of 10 and having a notch 11 carved in the circumferential edge is attached to a spring 12.
It is attached so as to bias the fixed cam 7 in one direction through the cam 7, and at the same time engages with the outer peripheral edge of the floating cam 9 to operate the time contact S, and at the same time contacts and separates from the impeller 5 linked to the clock mechanism. A cam lever 13 is provided, and a push button 21 is attached to one end of the cam lever 13.
By pressing the operating rod 20, which has a conical engagement portion 22 at the other end, it slides on the conical circumferential slope, closes the contact S, and operates the clock mechanism, so that the time setting operation can be performed as in the conventional method. Even if it takes some time, the time outside the timer setting time will not elapse with the contact S remaining closed, and even with a short-time timer, extremely accurate time can be obtained. In addition, the extremely simple addition of the floating cam 9 and the timer actuating rod 20 provides an accurate time setting function, which has the effect of making the parts compatible with conventional timers and reducing costs. Moreover, since the mechanism is simple, the timer can be made smaller. Furthermore, accurate timer time can be obtained through simple operation, its practical range is extremely wide, and it has practical effects not found in conventional timers.

[Brief description of the drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a perspective view, FIG. 2 is a plan view, FIG. 3 is a perspective view showing a main part, and FIGS. 4 to 6 are operational views. It is. 1... Main shaft, 5... Impeller, 6... Mainspring, 7
...Fixed cam, 8...Protrusion, 9...Idle cam, 1
0... Protrusion, 11... Notch, 12... Spring, 13... Cam lever, 20... Operating rod, 21
...Push button, 22...Conical engagement portion, S...Timed contact.

Claims (1)

[Scope of utility model registration request] A fixed cam with a convex portion is fixed to the main shaft, which uses a mainspring as a driving source and rotates at a constant rate, while a floating type has a protrusion that engages with the convex portion of the fixed cam and has a notch carved into the circumferential edge. The cam is mounted so as to bias the fixed cam in one direction via a spring, and at the same time engages with the outer peripheral edge of the floating cam and operates a time contact, and at the same time contacts and separates from the impeller connected to the clock mechanism. The cam lever is equipped with a push button at one end and has a conical engagement portion at the other end. By pressing an operating rod, the cam lever slides on a conical circumferential slope to close the contacts and operate the clock mechanism. A timer that features: