JP2563800B2 - Timer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to solve the following problems.

(Field of industrial application) The present invention relates to a timer used for a reversing timer of a washing machine.

(Prior Art) In a conventional timer, as shown in FIG.
A first cam surface 11A for the first contact spring 16A and an intermediate cam surface 12A for the common contact spring 17A, which are formed side by side on the outer periphery of 3A.
And a second cam surface 13A for the second contact spring 18A, each having a sharp step, and when the cam 3A is rotated in the direction of the arrow by a clock mechanism (for example, a timer motor or a spring mechanism) not shown. , The switch mechanism 5A as shown in FIG.
The first contact spring 16A suddenly drops the stepped portion 11cA of the first cam surface 11A, the first contact 16aA abuts the common contact 17aA, and the common contact spring 17A is intermediate as shown in FIG. 6 (B). The step 12cA of the cam surface 12A suddenly drops and the common contact 17aA becomes the second contact 1
Since the first contact point 16aA comes into contact with the common contact point 17aA, the first contact point spring 16A and the common contact point spring 17A violently vibrate and a loud crackle is generated. Even when the common contact point 17aA contacts the second contact point 18aA, the common contact point spring 17A and the second contact point spring 18A violently vibrate, which causes a loud crackle.

(Problems to be Solved by the Invention) Except for the above-mentioned conventional problems, the present invention can prevent generation of vibration noise of the first contact spring, the intermediate contact spring, and the second contact spring when switching the contacts, and An object of the present invention is to provide a timer capable of maintaining the contact speed of the contact point of the contact point spring at a high speed, enabling accurate switching timing, and preventing contact roughness.

 The configuration of the present invention is as follows.

(Means for Solving Problems) The invention of the present application employs means as described in the claims, and its operation is as follows.

(Operation) When the cam rotates, the first cam surface and the intermediate cam surface move toward each other while supporting the first contact spring and the common contact spring, respectively, and bring the first contact and the common contact into contact with each other. Further, the intermediate cam surface and the second cam surface support the common contact spring and the second contact spring, and move closer to each other to bring the common contact and the second contact into contact with each other. When both contacts come into contact with each other as described above, both contact springs are supported by the cam surface, so that vibration of the contact springs is prevented.

(Example) Hereinafter, drawings showing an example of the present application will be described. Reference numeral 1 is a timer, which is configured as follows. 2 is a rotary shaft rotatably supported by a substrate (not shown), 3 is a rotary shaft 2
The cam is mounted so as to rotate integrally with the first cam surface 11, the intermediate cam surface 12, and the second cam surface 13 having unevenness on the peripheral surface.
And the center of rotation are formed in common. Reference numeral 4 is a timepiece mechanism for rotating the cam 3 in the direction of the arrow at regular intervals, which is configured by a timer motor or a mainspring as well known.
It is attached to the board. Reference numeral 5 denotes a switch mechanism which is operated by turning on and off by the cam 3. The cam 3 and the switch mechanism 5 form a switching contact mechanism.

Next, in the switch mechanism 5, reference numeral 15 is a contact stand fixed to the substrate, which is made of an insulating material.
Reference numeral 16 is a first contact spring having a first contact 16a at its tip, 17 is a common contact spring having a common contact 17a at its tip, 18 is a second contact spring having a second contact 18a at its tip, and these are respectively It is made of a conductive material having a spring property, and its base is supported by the contact block 15. The first contact spring
The tip end of 16 is elastically contacted with the first cam surface 11, the tip end of the common contact spring 17 is contacted with the intermediate cam surface 12, and the tip end of the second contact spring 18 is elastically contacted with the second cam surface 13, respectively. Has been done.

Next, the first cam surface 11, the intermediate cam surface 12, and the second cam surface 13
2, reference numerals 11a, 12a and 13a are descending slopes as shown in FIG. 2 (a), and when the cam 3 is rotated in the arrow direction, the first contact spring 16, the common contact spring 17 and the second contact spring It is formed so that it can be moved toward the center of rotation while supporting 18. Further, 11b, 12b, 13b are respectively lifting slopes, which support the first contact spring 16, the common contact spring 17 and the second contact spring 18 from the center of rotation when the cam 3 is rotated in the direction of the arrow. It is formed so as to move to the side away from it.

The relative positional relationship between the descending slopes 11a and 12a and the lifting slopes 11b and 12b is as shown in FIG. 3, when the descending slope 11a lowers the first contact spring 16, the lifting slope 12b has a common contact. The spring 17 is lifted to bring the contacts 16a and 17a into contact with each other, and when the lifting slope 11b lifts the first contact spring 16, the descending slope 12a lowers the common contact spring 17 to separate the contacts 16a and 17a from each other. Is set to. The relative positional relationship between the descending slopes 12a and 13a and the lifting slopes 12b and 13b is as shown in FIG. 3, when the descending slope 12a lowers the common contact spring 17, the lifting slope 13b contacts the second contact. When the spring 18 is lifted to bring the contacts 17a and 18a into contact with each other, and the lifting slope 12b lifts the common contact spring 17, the descending slope 13a lowers the second contact spring 18 to contact 1
7a and 18a are set to be separated from each other.

In the above structure, when the cam 3 is rotated in the direction of the arrow shown in FIG. 2 (a) by the timepiece mechanism 4 in the switching operation, first, as shown in FIG. 2 (b), 1
The descending slope 11a of the cam surface 11 lowers while supporting the free end of the first contact spring 16, and at the same time, the lifting slope of the intermediate cam surface 12.
12b lifts while supporting the free end of the common contact spring 17.
As a result, as shown in FIG. 2 (c), the first contact 16a and the common contact 17a come into contact with each other, and then the common contact spring 17 pushes up the first contact spring 16 integrally. As described above, the first contact 16a
And the common contact 17a come into contact with each other, the free ends of the first contact spring 16 and the common contact spring 17 are respectively connected to the descending slope 11a of the first cam surface 11.
And the intermediate slope 12b of the intermediate cam surface 12 are supported and moved toward each other, so that the first contact spring 16 and the common contact spring 1 when the first contact 16a and the common contact 17a come into contact with each other.
The vibration of 7 can be reduced to prevent the generation of vibration noise, and the contact speed of the first contact 16a and the common contact 17a can be increased to make the switching timing accurate and reduce the contact roughness. Further, as shown in FIG. 2 (b), the lifting slope 12b raises the common contact spring 17 and at the same time, the descending slope 13a moves to the second slope.
The free end of the contact spring 18 is supported and lowered. As a result, as shown in FIG. 2 (c), the common contact 17a and the second contact 1
8a leaves. In that case, the common contact spring 17 and the second contact spring
As shown in FIG. 3, the common contacts 17a and the second contacts 18a are moved away from each other as shown in FIG. You can

Next, as shown in FIG. 2 (d), the lifting slope 11b is the first
At the same time when the contact spring 16 is lifted, the descending slope 12a lowers while supporting the free end of the common contact spring 17, resulting in the first
The contact 16a and the common contact 17a are separated as shown in FIG. 2 (e). In that case, the first contact spring 16 and the common contact spring 17 are
Since the first contact 16a and the common contact 17a are moved away from each other as shown in the figure, the first contact 16a and the common contact 17a can be separated at a high speed, and the switching timing can be accurate. Also, as shown in FIG. 2 (e), the descending slope
12a lowers while supporting the free end of the common contact spring 17, and at the same time, lift-up slope 13b lifts while supporting the free end of the second contact spring 18. As a result, the common contact 17a and the second contact 18a come into contact with each other as shown in FIG. 2 (f), and thereafter, the second contact spring 18 pushes up the common contact spring 17 integrally as shown in FIG. . When the common contact point 17a and the second contact point 18a come into contact with each other as described above, the free ends of the common contact point spring 17 and the second contact point spring 18 are respectively moved to the descending slope 12a of the intermediate cam surface 12 and the lifting slope of the second cam surface 13. Since it is supported by 13b and moved toward and away from each other, vibration of the common contact spring 17 and the second contact spring 18 when the common contact 17a and the second contact 18a come into contact can be reduced, and vibration noise is prevented. Yes, the common contact 17a and the second
The contact speed of the contact 18a can be increased, the switching timing can be made accurate, and contact roughness can be reduced.

FIGS. 4 and 5 show different examples of the present application.
The shapes of the cam surface 11h, the intermediate cam surface 12h, and the second cam surface 13h are changed so that the cam surfaces 11h, 12h, 13h form the first contact spring 16h, the common contact spring 17h, and the second contact spring 18h as shown in FIG. It is designed to operate as shown in.

In addition, the parts which are considered to be the same or equivalent in structure to those in the previous figure in terms of function are denoted by the same reference numerals as those in the previous figure and the letters h in the alphabet.
And redundant description is omitted.

As described above, according to the present invention, when the first contact 16a is brought into contact with the common contact 17a, the first contact spring 16 is set to the first
Since the common contact spring 17 is moved to the common contact spring side while being supported by the cam surface 11, and the common contact spring 17 is moved to the first contact spring side while being supported by the intermediate cam surface 12, the first contact 16a and the common contact 17a are moved. It is possible to prevent the first contact spring 16 and the common contact spring 17 from vibrating violently when they come into contact with each other, and when the common contact 17a is brought into contact with the second contact 18a, the common contact spring 17 is supported by the intermediate cam surface 12. However, since the second contact spring 18 is moved to the common contact spring side while being supported by the second cam surface 13 toward the second contact spring side, when the common contact 17a and the second contact 18a contact each other. Moreover, it is possible to prevent the common contact spring 17 and the second contact spring 18 from violently vibrating. As a result, there is an effect that the generation of vibration noise at the time of switching the contacts can be made extremely small and the contacts can be switched quietly.

Further, as described above, the first contact spring 16 and the common contact spring 17 are relatively slowly moved while being supported by the first cam surface 11 and the intermediate cam surface 12, respectively, so that the first contact 16a and the common contact 17a.
Even when the first contact 16a and the second contact 18a are respectively brought into contact with each other, when the first contact 16a is brought into contact with the common contact 17a as described above, the first contact spring 16 and the common contact spring 17 Are moved toward each other and the common contact 17a is brought into contact with the second contact 18a, the common contact spring 17 and the second contact spring 18 are moved toward each other.
First contact 16a and common contact 17a and common contact 17a and second contact 1
The relative contact speed of 8a can be increased, the contact switching timing can be made accurate, and the roughness of each contact can be reduced.

[Brief description of drawings]

The drawings show an embodiment of the present application. FIG. 1 is a perspective view of a switching contact mechanism of a timer, FIGS. 2 (a) to 2 (f) are plan views showing the operation in order, and FIG. 3 is a movement of a contact spring. FIG. 4 is a plan view showing a different embodiment, and FIG.
Explanatory drawing which shows the movement of the contact spring of the example shown in FIG. 6, FIG. 6 (A), (B) is a top view which shows operation | movement of a prior art example. 3 ... Cam, 4 ... Clock mechanism, 5 ... Switch mechanism, 11
...... First cam surface, 12 ...... Intermediate cam surface, 13 ...... Second cam surface, 16 ...... First contact spring, 16a ...... First contact, 17 ...... Common contact spring, 17a ...... Common contact, 18 …… Second contact spring, 1
8a …… Second contact.

Claims (1)

(57) [Claims] 1. A substrate is provided with a rotatable cam, a timepiece mechanism for rotating the cam at a fixed time, and a changeover switch mechanism juxtaposed close to the cam, and the changeover switch mechanism is provided. A first contact point spring having a first contact point, a common contact point spring having a common contact point, and a second contact point spring having a second contact point, and between the first contact point and the common contact point by rotating the cam. And a timer configured to operate the changeover switch alternately between the common contact and the second contact,
On the peripheral surface of the cam, a first cam surface for operating the first contact point spring, an intermediate cam surface for operating the intermediate contact point spring, and a second cam surface for operating the second contact point spring are respectively provided as rotation centers. And the first contact spring, the common contact spring, and the second contact spring are respectively arranged so as to be common and aligned in the axial direction of the cam, and the first contact surface, the intermediate contact surface, and the intermediate contact surface, respectively. The first cam surface, the intermediate cam surface, and the second cam surface are tilted so as to be in contact with the second cam surface so that the cam itself can be moved toward and away from the center of rotation by the rotation of the cam. Is directed to a direction in which the first contact is brought into contact with the common contact, the first contact spring is moved toward the common contact spring side, and the common contact spring is moved toward the first contact spring side. When guiding the common contact in the direction of contacting the second contact, the common contact spring is moved toward the second contact spring, Timer, characterized in that is formed with second contact springs on the slope orientation to each moved to the common contact spring side.