JPS6328817Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a switch device that reduces inrush current of, for example, a motor by changing the on-timing of two switch mechanisms.

As is well known, when driving an electric motor or the like, an inrush current as shown by A in FIG. 1 flows at the moment a switch is turned on. This inrush current returns to the rated current in about one second, but even momentarily it can reach a high current of about 80A. Therefore, in order to prevent damage to the electric motor etc., a switch as shown in FIG. 2 is used. This switch consists of a first switch mechanism 11 and a second switch mechanism 12, and this second switch mechanism 12 has a resistor 1.
3 are connected in series, and these are connected in parallel to the first switch mechanism 11. Lead wires 14, 15 are connected to these, and these lead wires 14, 1
5 is connected to a load such as a power source and a motor (not shown). In such a switch, when an operator (not shown) is driven, first, the second switch mechanism 1 is activated.
2 is turned on, and a little later than this, the first switch mechanism 11 is turned on. That is, when the second switch mechanism 12 is turned on, the rush current is suppressed by the resistor 13, and after that,
The first switch mechanism 11 is turned on and the resistor 1
3 is shorted. Therefore, although current fluctuations occur as the second and first switch mechanisms 12 and 11 turn on, as shown by B in FIG. 1, excessive inrush current is prevented.

By the way, in the switch shown in FIG. 2, in order to turn on the first and second switch mechanisms 11 and 12 with a time difference, conventionally, movable contact pieces in the first and second switch mechanisms 11 and 12 are used. Methods of changing the operating distance of the first switch mechanism 11 or delaying the operation of the movable contact piece in the first switch mechanism 11 by using a rubber piece or a viscous body have been adopted. However, if the operating distance is changed or rubber or the like is used, the switching speed of the movable contact piece becomes slow and damage to the contact piece due to arcing occurs. Furthermore, when using rubber or a viscous material, it is difficult to reliably shift the on timing of the first and second switch mechanisms 11 and 12 due to changes in these materials over time.

This idea was made based on the above circumstances, and the first switch mechanism has an elastic member that is compressed as the operator is driven, and the second switch mechanism resists the biasing force of this elastic member. A holding member is provided to stop the operation of the movable contact piece until the second switch mechanism is in the on state, and after the second switch mechanism is in the on state, the movable contact piece is instantly driven by the elastic member to switch the first switch mechanism. By turning on the first switch mechanism, the on state of the first switch mechanism is reliably changed to the second switch mechanism.
It is an object of the present invention to provide a switch device in which the operation speed of the movable contact piece in the first switch mechanism can be delayed from the ON state of the first switch mechanism, and the operation speed of the movable contact piece in the first switch mechanism is fast.

An embodiment of this invention will be described below with reference to the drawings.

In FIGS. 3 and 4, 21 and 22 are divided switch cases, and this case 21 and 22 are divided switch cases.
The interior is partitioned by a partition wall 23. A first switch mechanism S1 is provided on one side of the partition wall 23, that is, the side shown in FIG. 3, and a second switch mechanism _S1 is provided on the other side of the partition wall 23, that is, the side shown in FIG.
S ₂ is provided. In addition, the switch case 2
The interiors of 1 and 22 are partitioned by a partition plate 24,
An operator 25 is provided between the partition plate 24 and the case 22.
A shaft portion 26 is provided to be slidable in the directions of arrows C and D in the figure. A recess 27 is provided at the inner end of the case 26 , and a return spring 28 is provided between the recess 27 and the inner wall surface of the case 22 . Therefore, the operation element 25 is moved to the case 2 by this return spring 28.
2 is biased in the direction of protrusion. Further, a stepped portion 29 is provided on the upper surface of the inner end of the case 26, and the protruding position of the operator 25 is defined by this stepped portion 29 and a stepped portion 30 provided inside the case 22. In addition, the case 2 located around the shaft portion 26
2 and the partition plate 24 are provided with a recess 31 , and a dustproof member 32 that comes into contact with the peripheral surface of the shaft portion 26 is provided within the recess 31 . Furthermore, along the sliding direction of the shaft portion 26 in the partition plate 24,
As shown in FIGS. 3 and 4, elongated holes 33 and 34 are provided, and protrusions 35 and 36 provided at the inner end of the case of the shaft portion 26 pass through these elongated holes 33 and 34, respectively. In other words, these protrusions 35, 36
is provided so as to straddle the partition plate 24 and the partition wall 23.

Next, the first switch mechanism _S1 will be explained using FIG. A solid portion 37 is formed integrally with the partition wall 23 at the inner bottom of the switch case 21.
is provided, and external connection terminals 38 and 39 are buried in the bottom of this solid portion 37. This terminal 38,3
One end of the terminal 9 corresponds to the through holes 40, 41 provided in the bottom of the case 21, and the other end of the terminal 38, 39 is provided with one end of the first and second fixed contact pieces 42, 43. It will be done. These fixed contact pieces 42 and 43 are arranged in the cavity 44 of the case 21 along the inner wall surface of the case 21, and the other end of the first fixed contact piece 42 is bent along the solid part 37. Ru. Furthermore, an actuator 45 is provided within the empty space 44 . This actuator 45 is slidable along the driving direction of the operator 25, and at both ends of this actuator 45 there is a U-shaped first movable member that is in sliding contact with the first fixed contact piece 42. Both ends of the contact piece 46 are engaged. Furthermore, actuator 45
An operating pin 47 whose tip abuts against the first movable contact piece 46 is removably inserted into one end;
This actuating pin 47 is always urged in the direction of the movable contact piece 46 by a spring 48 embedded in the actuator 45. Therefore, the first movable contact piece 46 is pressed against the first fixed contact piece 42. Further, the other end of the actuator 45 is provided with a concave accommodating portion 49 into which a protrusion provided on the shaft portion 26 of the operator 25 is inserted. The housing portion 49 includes the protruding portion 35 and the housing portion 49.
An elastic member such as a coil spring 50 is placed between the inner wall surface of the
is interposed, and the biasing force of the spring 50 biases the actuator 45 and the first movable contact piece 46 in the direction of the second fixed contact piece 43. Further, a presser member 51 whose tip end passes through the first fixed contact piece 42 in the longitudinal direction of the solid portion 37 and is freely removable is inserted into the solid portion 37 .
The first movable contact piece 46 is biased by a spring 52 embedded therein. However, the operator 25
When the presser member 51 is in the protruded state as shown in FIG.
6 and actuator 45 are regulated. Note that the engagement state between the presser member 51 and the movable contact piece 46 is determined by the biasing force of the spring 50 such that the operating element 25 is driven in the direction of arrow C in the figure and, for example, the protrusion 35 is released at a position beyond the presser member 51. And the engagement force between the presser member 51 and the movable contact piece 46 is defined.

Next, the second switch mechanism _S2 will be explained using FIG. A solid portion 54 integrally formed with the partition wall 23 is provided inside the switch case 21, and external connection terminals 55, 56 are embedded in the bottom of the solid portion 54. This terminal 55, 56
One end corresponds to through holes 57 and 58 provided in the bottom surface of the case 21, and one end of third and fourth fixed contact pieces 59 and 60 are provided at the other end. These fixed contact pieces 59 and 60 are arranged in the cavity 61 of the case 21 along the inner wall surface of the case 21, and the other end portions are bent along the solid portion 54. Further, a contact 62 is provided at the other end of the third fixed contact piece 59,
Support portions 63 are provided on opposite sides of the other end of the fourth fixed contact piece 60 . (Note that only one of the support portions 63 is shown in FIG. 4) This support portion 63 is located closer to the operator 25 than the longitudinally intermediate portion of the solid portion 54. As shown in FIG. Further, this support portion 63 includes a middle portion of a second movable contact piece 65 which is made of a leaf spring and has one end fixed to the fourth fixed contact piece 60 and a contact 64 provided at the other end. It will be placed. That is, a locking piece 66 is provided on both sides of the intermediate portion of the movable contact piece 65, and this locking piece 66 engages with the recess 67 of the support portion 63.
engaged within. Further, the shaft portion 2 of the operator 25
The tip of the protrusion 36 provided at the second
An operating pin 68 that is in contact with the movable contact piece 65 is inserted and removably inserted into the protrusion 36 .
The movable contact piece 65 is biased by a spring 69 embedded in the movable contact piece 65 .

The operation in the above configuration will be explained. Operator 25
In the non-driving state, the operator 25 is in a state protruding from the cases 21 and 22 as shown in FIGS. 3 and 4, and the first and second switch mechanisms S ₁ and S ₂
is in the off state. In this state, when the operator 25 is driven in the direction of arrow C in the figure, the operating pin 68 in the second switch mechanism _S2 first climbs over the support part 63, and in this state, the second movable contact piece 65 is bent and the contact 62 and 69 are brought into contact. Therefore, first, the second switch mechanism is turned on.

On the other hand, in the above state, the first switch mechanism
At S ₁ , the spring 50 is compressed by the protrusion 35 as the operator 25 is driven. However, the pressing member 51
The movable contact piece 46 is engaged with the first movable contact piece 46.
And the actuator 45 is stopped. When the operator 25 is further driven in the direction of arrow C from this state and the biasing force of the spring 50 becomes stronger than the engagement force between the pressing member 51 and the movable contact piece 46, this engaged state is released and the movable contact piece 46 and actuator 45 are instantaneously driven in the direction of arrow C in the figure by the biasing force of spring 50. Therefore, as shown in FIG. 5, the movable contact piece 4
6, the first and second fixed contact pieces 42 and 43 are connected and turned on.

When the driving force of the operator 25 is released from the above state, the operator 25 is driven by the return spring 28 in the direction of arrow D in the figure. At this time, in the first switch mechanism S ₁ , the protruding portion 35 comes into contact with the inner wall surface of the accommodating portion 49 of the actuator 45 . Then, in this state, the actuator 45 and the first movable contact piece 46 are driven in the direction of arrow D in the figure, and are returned to the OFF state as shown in FIG. 3. In addition, in the second switch mechanism _S2 , the actuating pin 68 climbs over the support part 63 and reaches the fourth switch mechanism S2.
The switch is returned to the off state as shown in the figure.

Note that in actual use, terminals 41 and 5
7 is connected through a resistor, terminals 40 and 58 are directly connected, and a power source and a load are connected between terminals 40 and 41.

According to the above configuration, the presser member 51 is attached to the movable contact piece 4.
6, and stops the operation of the movable contact piece 46 until the second switch mechanism _S2 is turned on. Therefore, compared to the conventional case where the movement of the movable contact piece is restricted by a rubber piece or a viscous body, the ON state of the first switch mechanism _S1 is reliably delayed from the second switch mechanism _S2 . be able to.

Further, after the second switch mechanism S ₂ is turned on, the pressing member 51 and the movable contact piece 46 are moved together by the biasing force of the spring 50 that has been compressed as the operator 25 is driven. The engaged state is released, the movable contact piece 46 is instantly driven, and the first switch mechanism S ₁
is in the on state. Therefore, since the movable contact piece 46 is driven by the biasing force of the spring 50,
Compared to the conventional case in which a rubber piece or viscous material is used, the switching speed of the switch is very high, and the switch has the advantage that damage to the contact piece due to arcing is extremely small.

It should be noted that this invention is not limited to the above embodiment, and various switches such as a slide switch or a seesaw type switch can be applied as the second switch mechanism _S2 .

Further, the holding member 51 is connected to the through hole 53 of the movable contact piece 46.
Although the actuator 45 is engaged with the actuator 45, the actuator 45 may be engaged with the actuator 45. Furthermore, the location of the holding member 51 is not limited to the solid portion 37, but is also applicable to the switch case 21.
It is also possible to provide it on the partition wall 23.

It goes without saying that various other modifications can be made without departing from the gist of the invention.

As described in detail above, according to this invention, it is possible to reliably delay the on state of the first switch mechanism from the on state of the second switch mechanism, and moreover, the movable contact in the first switch mechanism It is possible to provide a switch device whose operation speed is high.

[Brief explanation of the drawing]

Fig. 1 is a diagram shown to explain the inrush current when the switch is turned on, Fig. 2 is a circuit diagram shown to explain the principle of the delay switch, and Figs. 3 to 5 are the switches related to this invention. One embodiment of the device is shown, and FIGS. 3 and 4 are side views of the switch viewed from different directions, and FIG. 5 is a side sectional view showing different operating states of FIG. 3. S ₁ , S ₂ ...first and second switch mechanisms, 21,
22...Case, 25...Operator, 35...Protrusion, 42, 43...First and second fixed contact pieces, 45
... Actuator, 46 ... First movable contact piece, 50 ...
Spring, 51...pressing member.

Claims (1)

[Scope of utility model registration request] A first and a second switch mechanism are provided in the switch case, and when the operator is driven, the second
In a switch device in which a first switch mechanism is turned on and then a first switch mechanism is turned on, first and second a fixed contact piece, an actuator provided in the switch case and slidable in the operating element driving direction, both ends of which are locked to the actuator, and one end of which is connected to the first fixed contact piece. a movable contact piece that is in sliding contact; a protrusion that protrudes from the operator and is disposed in a accommodating part provided in the actuator; an elastic member that biases the actuator and the movable contact piece in the direction of the second fixed contact piece; and an elastic member that is provided in the switch case and that pushes the movable contact piece against the urging force of the elastic member that occurs when the operator is driven. 1. A switch device characterized in that the first switch mechanism is constituted by a presser member that stops the operation of the switch until the second switch mechanism is turned on.