JPH0584008B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention is used as a switch for a ventilation fan in a toilet, and when an electric circuit is manually or automatically turned off or turned on, a desired time elapses after this operation. This invention relates to a delay switch that is turned on or off after the switch is turned on or off.

[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 installed a delay unit in the center of the box-shaped switch body.
This delay unit is provided with terminals on both sides, a handle above, and a contact mechanism below that opens and closes between the two terminals, and a cam is provided on the front of the delay unit, and this cam It is always biased in the forward rotation direction by a spring, and when forced to rotate in the reverse direction by the handle, it rotates slowly due to the action of the delay unit and operates the contact mechanism after a predetermined time. Developed a slow delay switch.

Incidentally, conventional switches have been provided with a rocking body that is associated with the handle via a spring, swings in response to the reversal operation of the handle, and stabilizes the handle in two stopped states of the reversal operation. In conventional switches, this oscillating body is supported by the terminal plate of the terminal section, and its displacement is prevented by
This was done by a rib provided in the center of the switch body.

However, in the above-described delay switch, since the delay unit is located in the center of the switch body, it is not possible to provide a rib to prevent the oscillating body from shifting, and the position of the oscillating body may shift when the handle is reversed. was. Due to this, the steering wheel lacked stability when the steering wheel was stopped.

[Purpose of the invention]

In view of the above points, the present invention can secure a predetermined delay time even if the on/off operation is repeated arbitrarily, has no restrictions on the mounting direction, and can downsize the entire switch. The object of the present invention is to provide a delay unit in which the handle is stabilized in two stop states of the reversing motion of the handle.

[Disclosure of the invention]

In order to achieve the above object, the present invention includes a delay unit in the center of a box-shaped switch body, terminal parts on both sides of this delay unit, a handle above, and a contact mechanism below to open and close 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 which rotates slowly under the action of a delay unit and operates the contact mechanism after a predetermined time; the delay switch is connected to the handle via a spring other than the spring; An oscillating body that oscillates in response to the reversing operation and stabilizes the handle in the two stop states of the reversing operation is supported by the terminal plate of the terminal portion, and both are engaged with each other, and the spring The handle is bent in a dogleg shape between the handle and the oscillating body, and another contact mechanism is provided above the terminal portion, and this contact mechanism is operated by tilting the oscillating body. The gist of the present invention is a delay switch characterized in that the entire delay switch is housed in a large rectangular single module. 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.

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. attached.
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, when the protrusion 44 abuts against the edge 46a or 46b of the bulge 45a, the cam 41
rotates forward and backward according to the movement of the cam 40.

A locking spring 6 is provided on both sides of the switch body 10.
1a, 61b, release buttons 62a, 62b, and terminal plates 63a, 63b, 63c, respectively, in FIG.
It is stored in the position indicated by the dashed arrow. The terminal plates 63a and 63b each have separate fixed contacts 64.
a and 64b, forming different contact mechanisms within one switch. One end of a plate-shaped contact spring 70 is joined to the terminal plate 63c, a presser 71 made of an insulating material is fixed to the center of the contact spring 70, and a movable contact 72 is formed at the lower part of the tip. The pressing element 71 is always urged by the elastic force of the contact spring 70 in a direction in which it comes into contact with the peripheral edges of the cams 40 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 presser 71
is moved up and down by the forward and reverse rotation of the cams 40, 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. Further, a lead plate 65 is bonded to the upper surface of the terminal plate 63c, and the lead plate 6 is a part of the terminal plate 63c. Notches 73a (there are two) on both sides of the oscillator 73 engage with rising portions 66a (there are two) on the sides of the convex portion 66 formed at the tip of the lead plate, and the convex portion 66 is used as a fulcrum. The oscillating body 73 oscillates, and a movable contact 74 formed on the lower surface of the tip of the oscillating body and a fixed contact 64b of the terminal plate 63b are attached to and detached from each other.

A square cover 80 is placed over the switch body 10, and this cover 80 and the switch body 1
0 is designed to be assembled using an assembly frame 81. A recess 82 is formed on the front and rear inner surfaces of the cover 80. The handle 90 has a window 91
A transparent lid 92 is attached to cover the window 91. And transparent card cover 93
is fitted into the handle 90 with a card 97 in between. 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. A coil spring 96 is fitted into the lower surface of the handle. That is, about the upper half of the coil spring 96 in the length direction is
It is fitted into a hole formed on the lower surface of the handle 90. Approximately the lower half of the coil spring 96 is exposed below the handle 90, and this exposed portion can be elastically bent. The lower end of the coil spring 96 is received by the spring support portion 75 of the rocking body 73. The rocking body 73 is actuated by a coil spring 96 so as to be tilted in a direction opposite to the direction in which the handle is tilted. At the end of the swing of the handle (in the stopped state), the coil spring 96 is bent into a dogleg shape or inverted dogleg shape, and the handle 90 is stabilized in the stopped state due to the restoring force of the coil spring 96 trying to return to its straight state. It's becoming like that. In other words, the handle of this switch is a tumbler button.

In this way, the rocking body 73 is related to the handle 90 via the coil spring 96, and
It oscillates according to the reversal operation of 0, and the 2 of the reversal operation
It functions to stabilize the handle 90 in two stopped states. If this rocking body 73 shifts,
The coil spring 96 may come off from the rocking body 73, or the coil spring 96 may not be bent when the handle 90 is stopped, and its restoring force may be lost. Therefore, the rocking body 73
It is necessary to make sure that it does not shift. Therefore, in this delay switch, as described above, the oscillator 73
is supported by the terminal plate 63c. That is, the oscillating body 73 is made to oscillate using the convex portion 66 formed at the tip of the lead plate 6, which is a part of the terminal plate 63c, as a fulcrum. The notch 73a of the rocking body 73 and the rising portions 66a on both sides of the convex portion 66
This is to prevent the oscillating body 73 from shifting and to determine the fulcrum of oscillation of the oscillating body 73. Further, the rising portions 66a prevent the coil spring 96 from coming off from both sides of the oscillator 73, but if the width between the rising portions 66a is made slightly wider than the outer diameter of the coil spring 96, the coil spring 96 can be 96 deviations can also be prevented. Even if two coil spring rings 96 are provided, the width is approximately equal to the width of the rising portion 66a, so that displacement of the coil spring 96 can be prevented.

The neon lamps 97 are connected to the terminal plates 63a and 63c, respectively. 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 rotated strongly (reversely rotated) against the biasing force of the coil spring 50, the distance between the protrusions 44
is separated from one end 46b of the bulging portion of the cam 41 and the other end 4
It is inclined so that it gradually becomes larger until it collides with 6a. 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 other end 46a.
When the cam 41 is rotated in the opposite direction to the position where it collides with the cam 40, the cam 41 is caused to follow the reverse rotation. Therefore, the presser 71 can move over the step between the peripheral edge 41a of the cam 41 and the notch 47 and move to a position in contact with the 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 period of time, when the protrusion 44 of the cam 40 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 the restoring force of the contact spring 70 causes the notch 47 to
Get into it. Then, the contact 72 is quickly separated from the contact 64a, and this electric circuit is turned off. This quick opening and opening action of the contacts 72 improves arc breakage.

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.

For example, this switch can be used as a switch for a toilet, etc., and the terminal on the oscillator 73 side can be used for lighting.
The terminal on the contact spring 70 side is connected to the ventilation fan. If you do this, the lights will be on and the ventilation fan will be running while you are using it, and when you turn off the lights after use, the ventilation fan will stop after a predetermined period of time, so you can stop the ventilation fan immediately. It is possible to eliminate the inconvenience that sometimes occurs, and also to obtain effects such as preventing forgetting to turn off the ventilation fan. This switch can also be used in various places other than the toilet. The delay time may be set according to the purpose of use, but the structure may be such that it cannot be adjusted.

The delay unit used in this invention is
By placing different poles of magnets facing each other and placing a conductive plate such as a copper plate between them, the eddy current generated in the conductive plate is used.
It may be a mechanism that delays (slows down) the forward rotation of the cam, or it may be a mechanism that delays the forward rotation of the cam by a combination of a gear train and a delay plate.

〔Effect of the invention〕

Since the delay switch according to the present invention has the structure described above, it can secure a predetermined 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, the rocking body does not shift,
The handle can be stabilized when the handle is stopped.

In particular, the spring that associates the handle with the rocking body is
Since it is attached in a dogleg shape so that it can be bent, both ends of the spring can be securely applied to both the handle and the oscillating body, even if the handle and the oscillating body are tilted in different directions. , it is possible to apply a biasing force in an appropriate direction.

In this invention, the rocking body not only has the function of simply stabilizing the handle in a stopped state, but also has the function of opening and closing the contacts of the contact mechanism that is directly actuated by the handle without performing a delayed operation. In order for the contact opening/closing of this contact mechanism to quickly switch between the open state and the closed state, and to maintain the switched state stably, the operating force of the handle must be applied via the spring to the rocking body. It is necessary for this state to be transmitted quickly and reliably, and to be stably maintained after the tilt of the rocking body has been switched.

Therefore, the aforementioned operating force can be transmitted quickly and reliably from the handle to the rocking body, and the tilted state of the handle and the rocking body can be stably maintained. It is extremely effective to adopt a spring structure that can be bent into a dogleg shape.

Moreover, as mentioned above, since the rocking body is engaged with the terminal plate, the spring is bent in a dogleg shape.
Even if a lateral acting force is generated that tries to return to the original state,
There is no need to worry about the rocking body shifting its position, and the spring bent into a dogleg shape can reliably apply the force that tends to return the rocking body to a straight line in a direction that stabilizes the rocking body and the handle in a stopped state.

Furthermore, since only a simple shaped spring is interposed between the handle and the rocking body and no other parts are required, the number of parts is small and the volume is also small.

As a result, together with the arrangement structure of the delay unit, cam, and two sets of contact mechanisms as described above, the overall structure of the switch can be simplified and downsized, and the delay switch can be integrated into a general-purpose embedded wiring connection device. This makes it possible to store the delay switch in the large rectangular single module of the mounting frame, improving the usability of the delay switch.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing one embodiment of the delay switch according to the present invention, FIG. 2 is a plan view showing the internal structure of the same in an assembled state, FIG. 3 is a front sectional view of the same, and FIG. 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. 10...Switch body, 20...Delay unit, 4
0, 41...Cam, 50...Coil spring (spring that biases the cam), 63a, 63b, 63c...Terminal plate, 64a, 64b...Fixed contact, 70...Contact spring, 72, 74...Movable contact, 73... Rocking moving object, 80
...Cover, 90...Handle, 96...Coil spring (spring that associates the rocking body with the handle).

Claims (1)

[Claims] 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, which is always biased by a spring in the forward direction of rotation, and when forced to rotate in the opposite direction by the handle, slowly rotates under the action of the delay unit; a delay switch configured to actuate the contact mechanism after a predetermined time; the delay switch is connected to the handle via a spring other than the spring, and is oscillated in response to a reversal operation of the handle; An oscillating body for stabilizing the handle in two stopped states of operation is supported by the terminal plate of the terminal section, and both are engaged with each other, the spring being arranged in a dogleg shape between the handle and the oscillating body. The delay switch is attached so as to be bendable, and is provided with another contact mechanism above the terminal portion, and this contact mechanism is operated by tilting the rocking body. A delay switch characterized by being housed in a large square module for one unit.