JPH0346437Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field] This invention is used as a switch for incandescent lamps, etc., and when an electric circuit is manually or automatically turned off or turned on, the electric circuit is switched on after a desired time elapses after this operation. The present invention relates to a delay switch for performing an on or off operation.

[Background technology]

Conventional delay switches use a combination of an oil dart pot and a magnet to determine the delay time.
Therefore, the delay time cannot be secured unless it is turned on for a certain period of time, the delay time changes if the temperature changes, the delay time changes if the surrounding metal changes, and the delay time changes depending on the mounting direction. There were drawbacks such as changes. Furthermore, due to its structure, it was not possible to make it smaller than a large square module for two units.

In order to solve this problem, the inventors conducted joint research and discovered a delay unit in the center of the box-shaped switch body, terminals on both sides of the delay unit, a handle on the top, and a handle on the bottom at both ends. A contact mechanism is provided for opening and closing between the children, and a cam is provided on the front surface of the delay unit, and this cam is always biased in the forward direction by a spring and rotated in the reverse direction by the handle. We have developed a delay switch that, when forced to rotate, slowly rotates due to the action of the delay unit and operates the contact mechanism after a predetermined period of time.

However, since the contact opening force depends only on the return force of the contact spring and is weak, there is a risk that welding may occur at the contact portion during load switching of the incandescent lamp, and the contact may not open.

[Purpose of invention]

In view of the above points, the object of this invention is to provide a delay switch that can prevent welding of the contact portion and ensure the opening of the switch even if the on/off operation is repeated arbitrarily.

[Disclosure of invention]

In order to achieve the above objectives, this invention has a delay unit in the center of the box-shaped switch body, terminals on both sides of this delay unit, a handle above, and a contact mechanism below that opens and closes between the two terminals. A cam is provided on the front surface of the delay unit, and this cam is always biased in the forward rotation direction by a spring, and when forced to rotate in the reverse direction by the handle, the delay unit rotates in the opposite direction. A delay switch that rotates slowly under the action of a delay unit and operates the contact mechanism after a predetermined time, wherein a contact spring of the contact mechanism is always biased in a direction to open the contact. The gist of the present invention is a delay switch characterized by having a contact mechanism pulled by a telescoping member.

This will be explained in detail below based on the drawings showing one embodiment thereof.

As shown in Figures 1 to 4, a box-shaped switch body 10 has a delay unit 2 in the center.
0 is provided, and insulating plates 30 and 31 are disposed to sandwich the upper and lower surfaces thereof. By providing these insulating plates 30 and 31, heat from other parts is cut off, and the delay unit 2 made of thermoplastic resin is
Even if heat is applied to the 0 frame, it will not burn.

The delay unit 20 has a lever 25 extending from the bottom surface. This lever 25 serves as a delay time adjustment lever for adjusting the delay time.
A small hole 11 is formed in the bottom wall of the switch body 10, and when the delay unit is stored in the switch body, the lever 25 is brought out of the switch body through this small hole 11, and the lever 25 is inserted from outside the switch body. It is now operational. Switch body 1
A gasket 12 is sandwiched between the delay unit 20 and the delay unit 20 to prevent dirt and dust from entering through the gap between the small hole 11 and the lever 25.

Two cams 4 are mounted on the front of the delay unit 20.
0 and 41 are mounted on the casing of the delay unit 20 such that the pivot point 21 thereof is eccentric from the transmission shaft 22 of the delay unit. The cam 40 closer to the delay unit has
An arc-shaped notch 42 is formed with the fulcrum 21 as the center, and a toothed portion 43 is formed on the edge near the fulcrum 21 to mesh with a gear 23 fixed to the end of the transmission shaft of the delay unit. ing. The notch 42 is formed so that when the cam 40 is rotated, it will not be interfered with by the gear 23 of the delay unit and its cover. Between the cam 40 and the delay unit 20 is a coil spring 50, which has one end fixed to a protrusion 46 formed on the back surface of the cam 40 and the other end fixed to a protrusion 25 of an extension 24 extending upward from the delay unit 20. is installed.
The cam 40 is always urged in the forward rotational direction (in the direction of the arrow in FIG. 1) by the coil spring 50. On the other hand, the cam 4 far from the delay unit
1 has a large notch 45 formed therein so that when the cam 41 is rotated like the cam 40, it will not be interfered with by the gear 23 of the delay unit and its cover. There is. The peripheral edge of the large notch 45 on the side farther from the fulcrum 21 bulges out in an arc shape, and a projection 44 formed on the front surface of the cam 40 fits into this bulge portion 45a. Even when the cam 40 rotates in the forward and reverse directions, the cam 41 does not follow the movement of the cam 40 as long as the protrusion 44 moves within the bulge 45a. However, the protrusion 44 has a bulged portion 45a.
When the cam 4 collides with the edge 46a or 46b of the cam 4,
1 rotates forward and backward according to the movement of the cam 40.

Both sides of the switch body 10 are provided with terminal parts, and lock springs 61a, which constitute the terminal parts,
61b, release buttons 62a, 62b, and terminal board 63
a, 63b, and 63c are housed in the positions indicated by broken line arrows in FIG. 1, respectively. A wire insertion opening 15 is provided in the lower wall of the terminal portion of the switch body 10. The terminal plates 63a and 63b have separate fixed contacts 64a and 64b, respectively, and the switch 1
Different contact mechanisms are formed in each individual. Terminal board 6
3c is formed by joining two opposing plates to a plate that connects them at their central portions. Terminal board 63
C is open at both the top and bottom. With a terminal board whose top is closed, the locking spring cannot be stored after the terminal board is stored in the switch body, so the locking spring is stored first. However, when doing this, the locking spring sometimes fell into the recess in the center of the switch body. Therefore, the locking spring and the terminal board had to be housed at the same time, making assembly very difficult. If the upper part is open like the terminal board 63c, the locking spring can be stored after the terminal board is stored in the switch body, making assembly easier. Terminal board 63
The upper part of the inner board of c is extended toward the center of the switch. A convex portion 66 is formed at its tip. On both sides of this convex portion 66, there are rising portions 66a (there are two) that protrude further than this.
is provided. Convex portions 67 are formed on both sides of the upper end of the inner plate. Locking springs 61a, 61
b is surrounded by terminal plates 63a, 63b, and 63c, respectively, and is in contact with the inner plate of each terminal plate. A presser plate 68 is provided above the terminal plate 63c. The holding plate 68 is fitted into a recess 12 formed in the switch body 10, and holds the delay unit 2.
When moved in the 0 direction (indicated by arrow A in FIG. 3), the edge abuts against the edge 12a of the recess 12, and movement in that direction is restricted.
This holding plate 68 is made of an insulating material, and the terminal plate 63
It covers the upper opening of c. A hole 69 is formed in the holding plate 68 and is engaged with the convex portion 67 of the terminal plate. The convex portion 67 protrudes from the presser plate 68. A rectangular cover 80 is placed over the switch body 10, and the pressing force of this cover 80 toward the switch body 10 causes the presser plate 6 to
8 is pressed into the recess 12.

The electric wire inserted from the electric wire insertion port 15 on the terminal plate 63c side is connected to the outer plate of the terminal plate 63c and the locking spring 6.
1b. The electric wire is pressed and fixed against the outer plate by the elastic force of the locking spring 61b. At this time, a reaction force of the elastic force that presses the electric wire is applied to the inner plate of the terminal plate 63c in the direction of the delay unit. This reaction force causes the terminal plate 63 to
c The upper part is about to expand. However, as described above, the protrusion 67 of the terminal plate 63c is engaged with the hole in the holding plate 68 whose movement in the direction of the delay unit is restricted, and the reaction force passes through the holding plate and finally Since the terminal 63c is received by the edge 12a of the switch body 10, it is possible to prevent the terminal 63c from spreading. Also,
In this embodiment, since the presser plate 68 is fixed in the vertical direction by the pressing force of the cover 80, it is also possible to prevent the locking spring from lifting up when inserting the electric wire. A plate-shaped contact spring 70 is provided at the bottom of the terminal plate 63c.
One end of the contact spring 70 is joined, and a presser 71 made of an insulating material is fixed to the center of the contact spring 70.
A movable contact 72 is formed at the bottom of the tip. The pusher 71 is pushed against the cam 4 by the elastic force of the contact spring 70.
It is always biased in the direction of contact with the periphery of 0 and 41. As shown in FIG. 3, the cam 41 normally fits into a notch 47 formed in the cam 41. As will be described in detail later, the pusher 71 moves up and down due to the forward and reverse rotation of the cams 40 and 41 and the elastic force of the contact spring 70, and accordingly, the movable contact 72 is attached to and detached from the fixed contact 64a of the terminal plate 63a. It's becoming like that. A tension spring 76 is attached between the contact spring 70s and the switch body 10 in order to increase the contact separation force of the contact spring 70. The tension spring 76 is a convex portion 23b provided on the front surface of the gear subbar 23a.
and a presser 7 fixed to the center of the contact spring 70.
1 is connected to the convex portion 17 provided thereon. The rising portions 66a (there are two) on the sides of the convex portion 66 engage with the notches 73a (there are two) of the rocking body 73. The swinging body 73 swings using the convex portion 66 as a fulcrum. Along with this, the movable contact 74 formed on the lower surface of the tip of the oscillator and the fixed contact 64 of the terminal plate 63b
b is designed to be detachable. Rising part 66
By engaging the notch 73a with the notch 73a, the rocking body 73 is prevented from shifting. The rising portion 66a is formed by coil springs 96a, 96, which will be described later.
It also serves to prevent the rocker b from shifting in both directions.

The cover 80 and the switch body 10 are assembled into an assembly frame 81
It is designed to be assembled by. A recess 82 is formed on the front and rear inner surfaces of the cover 80. A window 91 is formed in the handle 90, and the window 9
A transparent lid 92 that covers 1 is attached. A transparent card cover 93 is fitted into the handle 90 with the card 94 sandwiched therebetween. The handle 90 is housed in the cover 80, and the recess 82 engages with a vertically elongated protrusion 95 formed on the front and rear surfaces of the handle, thereby serving as a swinging fulcrum for the handle 90. Coil spring 96 on the bottom of the handle
a and 96b are fitted, and are received by the spring support portion 75 of the rocking body 73. The rocking body 73 is tilted in a direction opposite to the direction in which the handle is tilted by the action of coil springs 96a and 96b. Coil springs 96a, 9 at the end of the swing of the handle
6b is bent into a dogleg shape or an inverted dogleg shape,
The handle 90 is reliably fixed in that position by the restoring force of the coil springs 96a, 96b trying to return to the straight state. In other words, the handle of this switch is a tumbler button.

The neon lamps 97 are connected to the terminal plates 63a and 63c, respectively. On the terminal plate 63c side,
The lead wire of the neon lamp 97 can be wound around the convex portion 67 of the terminal plate 63c, making connection by soldering easy. When the neon lamp 97 is lit, the light leaks out through the transparent lid 92, making it easy to locate the switch even in the dark. The entire switch is sized to be housed within a large rectangular single module.

FIG. 3 shows the switch in the off state, from which the right side of the handle 90 is pushed to tilt the handle in the opposite direction. Then, the rocking body 7
3 is tilted in the opposite direction, the movable contact 74 formed on the oscillator comes into contact with the contact 64a on the terminal plate 63b, and this electric circuit is turned on. At the same time, the protrusion 90a formed on the lower part of the handle pushes the protrusion 40a on the upper part of the cam 40, forcing the cam 40 to rotate around the fulcrum 21. After a certain stroke, cam 4
The protrusion 44 of No. 0 abuts against one end 46a of the bulging portion of the cam 41, and the cam 41 is moved together.

The peripheral edge 40b of the cam 40 that is in contact with the presser 71 of the contact spring is located between the contact point of the presser 71 and the rotation fulcrum 21.
When the cam 40 is forcibly rotated (reversely rotated) against the biasing force of the coil spring 50, the protrusion 4
4 is inclined so as to gradually increase in size from when it leaves one end 46b of the bulged portion of the cam 41 until it abuts against the other end 46a. Therefore, the pusher 71 is pushed down together with the above-mentioned reverse rotation of the cam 40. The cam 40 has a protrusion 44 at the front end 46.
When it is rotated in the opposite direction to the position where it collides with a,
The cam 41 is made to follow the reverse rotation, but at this point, the presser 71 is sufficiently lowered by the inclined peripheral edge 40b of the cam 40, so the presser 71 It is possible to move over the step between and the notch 47 and move to a position in contact with this peripheral edge 41a. The presser 71 is the cam 4
When pushed down like this by 0,41,
The contact 72 of the contact spring is the contact 64a of the terminal plate 63a.
When the wire comes into contact with the wire, this electrical circuit turns on.

As described above, the state shown in FIG. 5 is reached.
If you press the left side of the handle 90 from the state shown in Figure 5,
Since the handle 90 is in the state shown in FIG. 3 and the protrusion 90a of the handle is released from the protrusion 40a of the cam 40, the cam 40 returns to the state shown in FIG. 3 by the restoring force of the coil spring 50. Rotate forward for this purpose. At this time, the speed of the cam 40 is controlled by the action of the delay unit 20, and the cam 40 slowly rotates forward. When the presser 41 comes to the position of the peripheral edge 40b of the cam 40 as the cam 40 rotates forward, the presser 7
1 is separated from the periphery of the cam 40 and remains only on the periphery of the cam 41. After a predetermined time, cam 40
When the protrusion 44 comes into contact with one end 46b of the bulge of the cam 41, the cam 41 is moved together with the cam 49. At this time, since a notch 47 is formed in the cam 41, when this part comes to the position of the presser 71, the presser 71 suddenly loses its support, and due to the restoring force of the contact spring 70 and the tension spring 76. It goes into the notch 47. And contact point 7
This quick opening/opening operation of the contact 72, in which the contact 72 is quickly separated from the contact 64a and this electrical circuit is turned off, improves arc breakage.

Instead of this tension spring 76, a stretchable material such as rubber may be used.

In this embodiment, the mechanism is such that it turns off after a predetermined period of time, but by providing the fixed contact of the terminal plate above the movable contact of the contact spring, the mechanism turns on after a predetermined period of time. Good too. Furthermore, although the holding plate is provided only on the terminal plate 63c side, if holding plates are also provided on the terminal plate 63a and 63b sides, the above-mentioned effects can be obtained with these terminal boards as well.

The delay unit used in this invention is
It may be a mechanism in which the different poles of the magnets are placed opposite each other and a conductor plate such as a steel plate is placed between them, and the eddy current generated in the conductor plate is used to delay (slow down) the forward rotation of the cam. It may be a mechanism for delaying by a combination of a gear train and a delay plate.

[Effect of idea]

Since the delay switch according to this invention has the structure described above, it can secure a specified delay time even if the on/off operation is repeated arbitrarily, there is no restriction on the mounting direction, and the overall size of the switch can be reduced. The size can be downsized to a single large square module. Moreover, it is possible to prevent the terminal board from expanding when the electric wire is inserted into the terminal portion. Moreover, no welding occurs at the contact portions, and separation of the contacts can be ensured.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing one embodiment of the delay unit according to this invention, Fig. 2 is a plan view showing the internal structure of the same in the assembled state, Fig. 3 is a front sectional view of the same, and Fig. 4 is FIG. 5 is a front sectional view showing the state after the handle is tilted in the opposite direction from the state shown in FIG. 3. DESCRIPTION OF SYMBOLS 10...Switch main body, 17...Protrusion provided on the presser, 20...Delay unit, 23a...
Gear cover, 23b... Convex portion provided on the front surface of gear cover, 40, 41... Cam, 50... Coil spring, 63a, 63b, 63c... Terminal plate, 64a, 64b... Fixed contact, 67... Convex portion, 68... Holding plate, 69... Hole, 70... Contact spring, 72, 74... Movable contact, 73... Rocking body, 76... Tension spring, 80... Cover, 90...
…handle.

Claims (1)

[Claims for Utility Model Registration] (1) A delay unit is provided in the center of the box-shaped switch body, terminals are provided on both sides of the delay unit, a handle is provided above, and a contact mechanism that opens and closes between the two terminals is provided below. A cam is provided on the front face of the delay unit, and this cam is always biased in the forward rotation direction by a spring, and when forced to rotate in the reverse direction by the handle, the delay unit is rotated in the opposite direction. It is a delay switch that rotates slowly under the action of a unit and operates the contact mechanism after a predetermined time, and the contact spring of the contact mechanism is an expansion/contraction switch that always biases the contact in the direction of opening and closing. A delay switch characterized in that it has a contact mechanism pulled by a member. (2) The delay switch according to claim 1, wherein one end of the telescoping member is fixed to the delay unit. (3) The delay switch according to claim 1 or 2, wherein the extensible member is a tension spring.