JPS6128368Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a timer having a structure in which, when the switch is activated after a set time has elapsed, the switch is operated quickly to prevent contact points from becoming rough.

Conventional timers of this type include a cam that is rotated in one direction by a timer motor, and a step with a gentle slope to lift the driven piece from the lower part of the cam to the higher part of the cam. , is provided with a step section with a steep slope to allow the driven piece to fall rapidly from a high step section to a low step section, and furthermore, between the cam and the contact plate of the switch provided on the outer circumferential side of the cam, there is a step section in the radial direction of the cam. Some have a driven piece that allows for free movement. (For example, see Japanese Patent Application Laid-Open No. 52-106479.) However, in this type of cam, the cam is I had a brain that could only turn in one direction. That is, when an attempt is made to turn the cam in the opposite direction, the stepped portion of the steep slope hits the driven piece, creating a gap there, which causes the problem that the cam cannot be rotated any further. If the stepped part for rapid falling was made to have a gentle slope, there was a problem that the desired rapid falling could not be achieved. Therefore, in order to solve the above-mentioned problems, we created play in the rotational direction between the main shaft and the cam, which are configured to allow forward and reverse rotation, and made the cam follow this movement using a step in the cam. When operating a switch, the cam is rotated in advance relative to the main shaft by a contact plate or other quick lever in the switch, and this causes the switch to move quickly. There was a drawback that the movement and the return rotation of the cam did not match. To solve this problem, a method has been devised in which a cam is fixed to the main shaft and a driven piece is provided between the cam and the contact plate of the switch to allow the cam to move freely in the tangential direction. In this case, a special spring is required to operate the driven piece, which has the disadvantage of increasing the number of parts.

Therefore, the present invention was designed to eliminate the above-mentioned drawbacks. Even if the cam is fixed to the main shaft so that both rotate together, the switch that is driven by the cam cannot move quickly. The purpose of the present invention is to provide a tire mer that can be moved without increasing the number of parts.

The drawings showing the embodiments of the present application will be described below. 1 to 3, 1 is a well-known base plate, 2 is a main shaft, 3 is a cam fixed to the main shaft 2,
It is made of a synthetic resin material with low friction, and has a high step part 4 and a low step part 5 formed on its outer periphery as shown in the figure. Note that this outer circumferential surface is formed to be smooth to reduce friction. Reference numeral 6 indicates a stepped portion between the high step portion 4 and the low step portion 5, and a part of the cam 3 is arranged so that the wall surface 6a of the stepped portion 6 coincides with the semi-longitudinal direction of the cam as shown in the figure. It is formed by lacking it. Note that 7 indicates the missing part.

Next, reference numeral 8 is a crown that constitutes a part of a well-known clock mechanism, and is pivotally attached to the main plate 1 about a shaft 9. 10 indicates a piece that is integrated with Tenfu 8. Next, 12 is a driven piece, which is made of a synthetic resin material with low friction. In this driven piece 12, 13 is a base;
It is disposed between the base plate 1 and the cam 3 so that the cam 3 prevents it from rising up from the base plate 1. Reference numeral 14 denotes a pivot rod, which is fitted into a long hole 15 in the radial direction of the cam bored in the base plate 1, so that the driven piece 12 moves in the radial direction of the cam 3, and the driven piece 12 moves in the radial direction of the cam 3. This allows for tilting around the axis. 16 and 17 are pressed pieces formed long in the tangential direction of the cam 3; 18 are cam contact pieces formed long in the radial direction of the cam 3; The side facing the wall surface 6a of the portion 6 has a wall surface 18a facing the cam 3 as shown in FIGS. 1A, C, and D.
It is cut out so that it coincides with the radial direction of. 1
9 indicates the missing part. 20 is a stop piece, the main plate 1
It is made to protrude to the side of the crown 8 through a through hole (not shown) bored in the. Next, reference numeral 21 denotes a switch, which, as is well known, is comprised of a holder 22 fixed to the base plate 1 and contact plates 23 and 24 held by the holder 22. Note that these contact plates 23, 2
4 is made of an elastic metal material as is well known. 25 and 26 are known contact plates, and 27 is a receiving piece of the contact plate 24.

Next, the operation of the above-described structure will be explained based on FIGS. 1A to 1D.

First, when the main shaft 2 is manually rotated in the time setting direction, that is, in the counterclockwise direction from the rest state of A, the cam 3 also rotates together, and at the beginning of the rotation, as shown in B, the cam Since the wall surface 6a of the stepped portion 6 of No. 3 pushes the wall surface 18a of the cam contacting piece 18 of the driven piece 12, the driven piece 12 tilts clockwise. When the cam 3 further rotates, the wall surface 18a is pushed by the apex 6b of the stepped portion 6, and the driven piece 12
moves in the direction of arrow 30, and the tip of the cam contact piece 18 comes into contact with the high step portion 4 of the cam 3. Note that in the process of tilting the driven piece 12 or moving in the direction of the arrow 30, the contact plate 23 is moved toward the contact plate 24 and the contact balls 25 and 26 come into contact with each other, and the switch 2
1 is in the closed state. In this way, the cam 3 is rotated by a desired angle, and the time setting is completed. Next, when the hand is released from the main shaft 2 in this state, the main shaft 2 is rotated in the timed rotation direction (return direction), that is, clockwise, by the clock mechanism. The cam 3 also rotates together with the main shaft 2. Then, the pressed piece 16 or 17 of the driven piece 12 is pressed toward the cam 3 by the contact plate 23, and as shown in C, the wall surface 18a of the cam contact piece 18 coincides with the radial direction of the cam 3. It comes into contact with the cam 3 in this state. (This state may occur due to the strength of the elasticity of the contact plate 23, the ratio of the length of the pressed pieces 16, 17 to the length of the cam contact piece 18, or the relationship between the cam contact piece 18 and the cam 3. Depending on various conditions such as the magnitude of friction, the driven piece 12 may rise to the high step 4 of the cam 3 immediately, or it may occur after the cam 3 has started rotating in the timed rotation direction. ) When the cam 3 rotates in this manner and the set time is about to end, the positional relationship between the cam 3 and the driven piece 12 becomes as shown in D. When the cam 3 further rotates, the cam abutting piece 18 of the driven piece 12 drops the step part 6 toward the lower step part 5 due to the urging force of the contact plate 23, and the state shown in A is reached and the switch is turned off. 21 is opened. In this case, the stepped portion 6 and the cam contact piece 18
Since the cam abutting piece 18 is formed in the above-described shape, the cam abutting piece 18 is allowed to fall without being hindered by anything, and the switch 21 is quickly closed. At the same time, the stop piece 20, which had been outside the swinging range of the lifting piece 10 at the top 8 as shown in B, C, and D, is moved to the lifting piece 10 as shown in A.
0, the swinging of the crown 8, that is, the operation of the clock mechanism is stopped. Note that the shapes of the stepped portion 6 and the cam abutting piece 18 may be other shapes as long as the above-described operations can be performed.

Next, FIGS. 4 and 5 show different embodiments of the present application. In the figure, a cam 31 rotates integrally with the cam 3e, and has a recess 32 in a part of its outer periphery. Reference numeral 33 denotes a switch, which is constructed using first to third contact plates 34, 35, and 36, and the contact plate 35 has a driven piece 3 at its tip.
7 is integrally provided and is adapted to follow the cam 31 mentioned above. A driven piece 38 is formed integrally with the driven piece 37, and is opposed to a push-up piece 39 formed integrally with the pressed piece 16e of the driven piece 12e. In the above configuration, the contact plates 34, 35 are connected to the operating circuit of the controlled device, and the contact plates 35, 36 are connected to the operating circuit of the controlled device.
is connected to the buzzer circuit.

In this connected state, when setting a time limit, when the driven piece 12e is tilted as shown in FIG. A connection is made;
Also, during the timed rotation, the driven piece 37 comes into contact with the high step part of the cam 31, as shown in C, and the contact plate 3
4 and 35 are maintained. Therefore, the controlled device becomes energized and follows.

Next, when the set time period ends, the driven piece 37 falls into the recess 32 as shown in D, and the contact plates 34, 3
5 is disconnected and the controlled device stops operating, and at the same time the contact plates 35 and 36 are connected and the buzzer sounds. After a further short period of time has elapsed, the cam abutting piece 18e of the driven piece 12e falls down the stepped portion 6e, resulting in a stopped state as shown in A.

It should be noted that the same reference numerals as those in the previous figure are appended with an alphanumeric letter "e" for parts that are functionally the same or equivalent to those in the previous figure, and redundant explanations are omitted.
(Furthermore, in the following figure, the same idea is given with an alphanumeric letter f, and redundant explanation will be omitted.) Next, FIGS. 6 and 7 show still different embodiments of the present application. 1 to 3, a cam 41 that rotates integrally with the cam 3f and one contact plate 43 are added, and a driven piece 44 provided at the tip of the contact plate 43 is added to the cam 41. This is an example of following the following. Incidentally, reference numerals 45 and 46 are a driven piece and a push-up piece that function similarly to those shown in FIGS. 4 and 5, respectively. Further, in the timer having such a configuration, for example, the contact plates 23f and 24f are connected to a controlled circuit, and the contact plate 43 is connected to a buzzer.

When connected in this way, as shown in FIG. 6D, the contact plate 43 becomes connected to the contact plates 23f and 24f, the buzzer sounds, and a short period of time elapses. When the time elapses, the state comes to a halt as shown in A.

As described above, in this invention, the cam 3 is fixed to the main shaft 2, so when the cam 3 is operated after setting the time, the main shaft 2 rotates in the timed rotation (rotation in the return direction). ), the cam 3 also starts its timed rotation at the same time. Moreover, even if the cam 3 is fixed to the main shaft 2 in this way, the stepped portion 6 of the cam may be removed after the set time period has elapsed.
When the driven piece is dropped to operate the contact plate 23, the stepped portion 6 of the cam 3 and the driven piece 12 are provided with the cutout portions 7 and 19 as described above, respectively, so the driven piece 12 is moved to the stepped portion 6. This does not prevent the contact plate from rapidly falling in the radial direction of the cam 3, which allows the contact plate and the switch 21 to move quickly, and has the effect of preventing the contact from becoming rough.

Furthermore, even though the present invention uses the driven piece 12 as described above, the driven piece 12 is moved near and far in the radial direction of the cam 3. When the contact plate 23 is in contact with the high stage part 4 of the cam 3, a biasing force is applied to the contact plate 23 via the driven piece 12, and when the driven piece 12 is directed down from the high stage part 4 of the cam 3 to the low stage part 5 as described above, This can be dropped by the biasing force stored in the contact plate 23, and the contact plate of the switch 21, which is unique to the timer, is sufficient without using an extra spring, and the conventional This has the effect of overcoming the disadvantage of an increased number of parts, which the conventional method had.

As described above, the time switch of the present invention (a) enables the main shaft 2 and the cam 3 to rotate together without rattling, and (b) the driven piece 12 is placed at a high stage of the cam 3. One step 6 between the part 4 and the low step 5 allows the driven piece 12 to move toward the low step 5 when turning the cam 3 in the time setting direction.
When the cam 3 is rotated in the timed rotation direction, the driven piece 12 is dropped from the high step 4 to the low step 5, and the switch 21 is opened and closed by the one step 6. (c) The force for urging the driven piece 12 toward the cam 3 utilizes the spring force of the contact plate 23 of the switch 21, which has three effects. Furthermore, it has the following advantages (d) and (e). (d) When rotating the cam 3 in the time setting direction via the main shaft 2 and lifting the driven piece 12 from the low step part 5 to the high step part 4 at one step part 6 of the cam 3, Even if the radial wall surface 6a of the stepped portion 6 and the radial wall surface 18a of the cam abutting piece 18 of the driven piece 12 are opposed to each other (in a structure where there is a possibility that the two may push against each other), ), when the cam 3 is turned in the time setting direction, the abutment piece 18 is pushed by the stepped portion 6 of the cam, and the driven piece 12 is pushed as shown in FIG. 1B.
rotates, and the wall surface 18a becomes an inclined surface with respect to the direction of rotation of the cam, and when the driven piece 12 is used as a guide surface using the inclined surface, it can be lifted to the high stage part 4 of the cam, and the light rotation of the main shaft There is an effect that the driven piece can be lifted with the use of operating force.

(e) Moreover, even if the driven piece 17 is configured to rotate freely as described above, the cam 3 is rotated in the time-limited rotation direction when the cam contact piece 18 is in contact with the high step 4 of the cam 3. When the switch 21 rotates, the pressed piece 17 along the contact plate 23 of the switch 21 maintains the wall surface 18a of the cam contact piece 18 in a state that coincides with the radial direction of the cam 3. In other words, the cam contact piece Since the switch 18 is prevented from falling down, the space between the contact plate and the cam 3 in the switch can be maintained constant. This has the effect of preventing fluctuations in the mutual positional relationship of the contact plates in the switch, and has the effect of stably maintaining the operating state of the switch.

Furthermore, since the wall surface 18a is maintained in a state that coincides with the radial direction of the cam 3 as described above, it is ensured that the driven piece 12 rapidly falls from the high step section 4 to the low step section 5 at the one step section 6. It has the effect of making you

[Brief explanation of the drawing]

The drawings show embodiments of the present application, and FIGS.
D is a front view showing the operation process, FIG. 2 is a sectional view taken along the line -- in FIG. 1 D, FIG. 3 is a view taken in the direction of the arrow in FIG. Figure 4 is a type diagram of Figure 1, and Figure 5 is similar to Figure 1.
The figure is a view in the direction of arrow V in Figure 4D, Figures 6 and 7 show further different embodiments, Figure 6 is a similar view to Figure 1, and Figure 7 is Figure 6D. The arrow direction view in . 2...Main shaft, 3...Cam, 4...High section, 5...
...Low step part, 6...Step part, 7... Missing part, 12...
...Driver piece, 19... Missing part, 21... Switch.

Claims (1)

[Scope of utility model registration request] A cam having a high step part and a low step part for dropping the driven piece around the periphery is fixed to the main shaft which is connected to the clock mechanism and can be rotated in forward and reverse directions, and the cam further includes:
After the contact plates of the switch are opposed to each other so that they can be driven via a driven piece disposed between the contact plate and the cam, and the cam is rotated in the time setting direction via the main shaft, the The mechanism rotates the cam via the main shaft in a timer rotation direction opposite to the timer setting direction, and the driven piece rotates the stepped portion between the high step and the low step from the high step to the low step. In the timer in which the contact plate is actuated by falling toward the stepped portion, the wall surface at the stepped portion between the high step portion and the low step portion of the cam is aligned with the radial direction of the cam. , On the other hand, the arrangement state of the driven piece is as follows.
The cam is arranged to move freely in the radial direction and rotate in a plane perpendicular to the main shaft, and the driven piece is arranged so that it can freely move in the radial direction of the cam and rotate in a plane perpendicular to the main shaft. a cam abutting piece that has a wall surface on the timed rotation direction side of the cam that coincides with the radial direction of the cam when in contact with the cam; and the cam abutting piece abuts the high step part. In order to maintain the state in which the wall surface of the cam contact piece coincides with the radial direction of the cam when the cam is in the cam contact position, the cam is provided with a pressed plate that extends in the timed rotation direction of the cam and extends along the contact plate. A timer featuring