JPS6323860Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an automatic return type switch in which the switch mechanism automatically returns to its original state when the operating force is released.

FIG. 1 shows an example of a conventional automatic return type switch. Reference numeral 11 designates a switch case, and fixed contact pieces 12 and 13 are provided at the inner bottom of the case 11, and a common contact piece 14 is provided at an intermediate portion thereof. This common terminal 14 is provided with a movable contact piece 15 that is curved so that the fixed terminal 13 side is higher. Further, a frame 17, a spacer 18, and a mounting plate 19 are sequentially provided in the upper opening 16 of the case 11. These frames 17, spacers 1
8. A through hole 20 is provided in communication with the mounting plate 19, and a sleeve 21 is provided in communication with this through hole 20. This sleeve 21 is the frame 1
7. It is integrally fixed to the spacer 18 and the mounting plate 19 by caulking. A manipulator 22 is provided inside the sleeve 21 so as to be tiltable, and the manipulator 22 is prevented from coming out by a holding member 23 press-fitted into the sleeve 21 . A recess 24 is provided along the axis of the operator 22, and a base end portion of an operating pin 25 is fitted into the recess 24. This recess 24
A spring 26 is provided inside, and the actuation pin 25
is urged toward the inner bottom of the case 11. A sliding member 27 made of resin is provided at the tip of the operating pin 25, and this sliding member 27 is connected to the movable contact piece 15.
is in sliding contact with the surface of the Furthermore, an operation button 28 is provided at the outer end of the sleeve 21 of the operator 22 .

In the above configuration, when the operation button 28 is not pressed, the operation element 22 and the movable contact piece 15 are moved to the first position.
In the state shown in Figure a, the fixed contact piece 12 and the common contact piece 14 are electrically connected. In this state, when a pressing force is applied to the operation button 28, the sliding member 27 slides on the movable contact piece 15 as the operator 22 tilts, and the movable contact piece 15 moves as shown in FIG. The fixed contact piece 13 and the common contact piece 14 are now electrically connected. From this state, the operation button 28
When the operating force applied to is released, the operating element 22 and the operating pin 25 are rotated along the curve of the movable contact piece 15 by the biasing force of the spring 26, and are automatically returned to the state shown in FIG.

With the above configuration, the basic performance as an automatic return switch can be obtained. However, since the shape of the movable contact piece 15 is extremely complex, variations in dimensional accuracy occur during component manufacturing. In addition, the common contact piece 14
When assembling the fixed contact pieces 12 and 13, some displacement may occur, and the movable contact piece 15 may be deformed due to arc wear. Therefore, there was a poor sense of moderation indicating that the switch state had changed reliably.

Therefore, an automatic return type switch using a cam as shown in FIG. 2 has been considered. In FIG. 2, the same parts as in FIG. 1 are designated by the same reference numerals, and their explanation will be omitted.

In FIG. 2, the fixed contact pieces 31, 32 and the common contact piece 33 are inserted from the inner bottom of the switch case 11 and arranged along the longitudinal side surface of the case 11. A partition wall 34 is provided in the center of the case 11, and a substantially V-shaped cam 35 is provided on the top surface of the partition wall 34, on which a sliding member 27 provided at the tip of the operating pin 25 slides. . A stepped portion 36 is provided at the center of one inclined surface of the cam 35 so as to coincide with the center of tilting of the operator 22 . Further, the actuation pin 25 is passed through the actuation member 37. This actuating member 37 moves toward the partition wall 3 as the actuating pin 25 tilts.
4 along the longitudinal direction of the switch case, and a movable contact piece 38 that slides on the fixed contact pieces 31, 32 and the common contact piece 33 is provided on the side surface of the operating member 37. Further, the actuating member 37 has a recess 3 into which a spring (not shown) is inserted to bias the movable contact piece 38 in the direction of the contact pieces 31 to 33.
9 and 40 are provided. In addition, 41 is the operating member 37
It is a presser plate.

In the above configuration, when the operating button 28 is pressed, the operating element 22 is tilted in the direction of the arrow A shown in the figure, and the sliding member 27 overcomes the stepped portion 36 of the cam 35 during the operation, and moderation occurs at this time. However, in such a configuration, in order to generate appropriate moderation, the stepped portion 36 is
must be made somewhat high and steep. For this reason, the force necessary for the sliding member 27 to get over the stepped portion 36 becomes large, and the operating feeling of the operating button 28 is poor. Further, since the stepped portion 36 and the sliding member 27 were subject to severe wear, the mechanical life was short.

This idea was made based on the above circumstances, and by providing a moderation member that instantly tilts in accordance with the operation of the operator on the inclined part provided inside the switch case, good moderation and operation feeling are achieved.
Furthermore, the present invention aims to provide an automatic reset type switch that has a long mechanical life.

An embodiment of this invention will be described below with reference to the drawings. Incidentally, the same parts as in FIG. 2 are given the same reference numerals, and the description thereof will be omitted.

In Fig. 3 a, b, c, switch case 1
1 has fixed contact pieces 51, 52, 53, 54 on the bottom part.
and common contact pieces 55 and 56 are inserted, and the inner ends of these are disposed on the side wall surface of the case 11. Further, a partition wall 57 is provided at the center of the inner bottom of the switch case 11 along the longitudinal direction. A long groove 58 into which the operating pin 25 and the sliding member 27 are inserted is provided in the upper surface of the partition wall 57. A slope portion 59 is provided at a part of the bottom of the long groove 58, the lower end of which is located on one end side of the case 11 with respect to the center of tilting of the operator, and the upper end of which is located on the other end side of the case 11. A recess 60 is provided in the center of the inclined portion 59, and the lower inclined edge of the recess 60 is located at the center of rotation of the operator 22. Moreover, engagement grooves 61, 61 are provided at the center of rotation of the operator 22 on opposing side surfaces of the long groove 58. Further, a moderation member 62 is provided inside the long groove 58. This moderation member 62 is, for example, curved as shown in the figure, and engagement pieces 63, 63 that are engaged with the engagement grooves 61, 61 are provided on both sides of the center portion. Thus, in the assembled state, the sliding member 27 is in sliding contact with the upper surface of the moderation member 62.

The partition wall 57 is formed separately from the switch case 11.
The operating member 68 is fixed by the fixed contacts 51 to 54 and the common contacts 55 and 56. The operating member 68 is fixed by the fixed contacts 51 to 54 and the common contacts 55 and 56. The operating member 68 is fixed by the fixed contacts 51 to 54 and the common contacts 55 and 56.
Further, the operating member 68 is provided with recesses 71 and 72 into which springs (not shown) are inserted for biasing the movable contacts 69 and 70 in the directions toward the fixed contacts 51 to 54 and the common contacts 55 and 56 .

In the above configuration, when no pressing force is applied to the operation button 28, the operation element 22 and the operation pin 2
5, the sliding member 27 and the joint member 62 are in the position shown in FIG.
6 and fixed contact pieces 51, 52 are movable contact pieces 69, 70
It is connected by. In this state, when a pressing force is applied to the operating button 28, the operating element 22 is tilted in the direction of arrow B in the figure, and the sliding member 27 is accordingly slid on the joint member 62.
When the sliding member 27 crosses the tilting center of the operator 22, the moderating member 62 instantaneously tilts in the direction shown by the arrow C in the figure, and the end of the moderating member 62 on the other end of the case 11 comes into contact with the inclined portion 59. come into contact with This is when moderation occurs. When the operation button 28 is pressed further from this state, the movable contacts 69 and 70 that are slid according to the operation of the operator 22 connect the common contacts 55 and 56 and the fixed contacts 53 and 54 of the switch mechanism. The state will be as follows. In this state, when the pressing force on the operating button 28 is released, the operating element 22 is tilted in the direction of arrow D in the figure by the biasing force of the spring 26. Along with this, the sliding member 27 slides down on the articulating member 62, and in the state where the sliding member 27 exceeds the tilting center of the operator 22, the articulating member 62 moves to the direction indicated by the arrow E.
Moderation occurs by instantaneously tilting in the direction. and,
Furthermore, in the tilted state of the operator 22, it is returned to the state shown in FIG.

According to the above configuration, the inclined part 59 is provided in the switch case 11, and the articulated member 62 is provided in the inclined part 59, and the articulated member 62 is connected to the operator 2.
Moderation is obtained by instantaneously tilting in response to the operation of step 2. Therefore, moderation can be obtained with less pressing operation force than in the past, and since there are no stepped portions, there is less wear and tear on the parts, making it possible to extend the mechanical life.

Furthermore, since the parts are extremely simple in shape, manufacturing and assembly are easy, and the product has the advantage of being less likely to have variations.

Note that this invention is not limited to the above embodiment, and the recess 6 of the sliding member 27 and the inclined portion 59
0 can be omitted. Further, the inclined portion 59 does not necessarily have to be provided on the partition wall 57, and only the inclined portion 59 may be provided inside the switch case 11.

Of course, various other modifications can be made without changing the gist of the invention.

As described in detail above, according to this invention, it is possible to provide an automatic return type switch that has good moderation and operation feel, and has a long mechanical life.

[Brief explanation of the drawing]

Figure 1 shows the configuration of a conventional automatic return type switch. Figures a and b are side sectional views showing different operating states, and Figure 2 shows a conventional automatic return type switch that is different from Figure 1. Figure 3 is a side cross-sectional view showing the structure of the automatic return type switch according to this invention. It is a figure showing the state seen from above. 11...Switch case, 22...Controller, 2
5... Actuation pin, 57... Partition wall, 59... Inclined portion, 62... Moderation member, 68... Actuation member.

Claims (1)

[Scope of utility model registration request] The switch mechanism includes an operator provided to be tiltable relative to the switch case, an operating pin provided to the operator so as to be freely removable and removable, and a switch mechanism that slides between one end and the other end of the case in conjunction with the operation of the operator. an actuating member that is provided in the switch case along the sliding direction of the actuating member, the lower end of which is located on one end of the case with respect to the center of tilt of the operator, and the upper end of which is located on the other end of the case; a sloped portion, and a tilting center provided on the sloped portion is located on a perpendicular line passing through the center of rotation of the operator to the bottom of the case, and the tip of the operating pin slides on the surface portion to respond to the operation of the operator. 1. An automatic return type switch comprising: a moderation member that is tilted on an inclined portion.