JPH031879Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a switching switch that selects one of the contacts connected to two different power sources and intermittently connects it to the load side contact.

Conventionally, as shown in FIG. 1, a conventional switch of this kind swings between two fixed contacts 101, 101 on the power supply side and selectively connects one of the fixed contacts 10.
The movable contact 10 on the load side is in contact with 1,101.
2 is installed, with the center OFF position and the left and right
The two power supply side fixed contacts 101,
There is a possibility that contact may occur between 101 and 101.

In order to eliminate the above-mentioned drawbacks of the conventional switching switch, the present invention arranges a load side fixed contact 3 between two power supply side fixed contacts 1 and 2 as shown in Fig. 2, and a movable contact located below. By making the switch 4 move in a substantially V-shape as shown by the arrow, sufficient switching time and switching distance can be obtained to interrupt the arc in a narrow space.

To explain an example of the implementation of the present invention with reference to the drawings, as shown in FIG. They are spaced apart from each other, and a load side contact 3 is provided between these two power supply side contacts 1 and 2.

Below these three fixed contacts, as shown in FIGS. 4 and 5, an operating shaft 6 is rotatably provided through the main body 5, and one end 36 of this operating shaft 6 is provided.
protrudes from the sides of the main body 5 and can be manually rotated, and switching levers 7, 7 are fixed to both sides. Both ends of a connecting rod 8 extending parallel to the operating shaft 6 are pivoted to the tip of the switching lever 7.
Three contact rods 10 are protruded from the connecting rod 8 at intervals from each other. Note that this embodiment is for a three-phase AC power supply.

A movable contact 4 having two contact parts 12, 12 on both sides passes through the tip of the contact rod 10 so as to be perpendicular thereto, and is constantly pressed in the tip direction by a pushing strip 14. It is now possible to tilt and restore.

The arrangement relationship between the three fixed contacts 1, 2, 3 and the movable contact 4 is such that, for example, when the movable contact 4 moves diagonally downward to the left from the position shown in FIG. 4, the first power supply side contact 1 opens first. , so that the load side contact 3 opens later, and conversely, when the movable contact 4 moves upward, it first contacts the load side contact 3 and then contacts the first power supply side contact 1. is moved slightly closer to the movable contact side.

As shown in FIGS. 6 and 8, at one end of the connecting rod 8, the base end of a plate 15 is fixed with a screw 11 so as to extend parallel to the contact rod 10 and operate integrally therewith. A sliding rod 16 is attached to the tip of this body plate 15, projecting in a direction perpendicular to the direction in which it extends. The sliding rod 16 is inserted into a substantially V-shaped guide hole 18 formed in the partition wall 17, and the same plate 15,
The contact rod 10 is also movable in a substantially V-shape. Here, it is understood that the body plate 15 merely acts as a substitute for the contact rod 10, and that even if the sliding rod 16 is attached directly to the tip of the contact rod 10, its operation can be moved first.

A switching plate 19 is mounted above the guide hole 18 of the partition wall 17 by a shaft 20, and a lower tip 21 of this switching plate 19 slightly protrudes into the central bent portion 22 of the guide hole 18. The upper protruding rod portion 23 is bent at a right angle, passes through the through hole 24 of the partition wall 17, and is inserted into the elongated hole 26 of the rotating body 25. This switching plate 19 is a sliding rod 16 that moves within the guide hole 18.
It is configured to contact the upper surface of the holder and rotate around a shaft 20.

The rotating body 25 has a cam surface 27 on the lower side, and the switching plate 1 is attached to the mounting plate 13 located on the opposite side of the partition wall 17.
9, and the other end of an expanding helical spring 28, whose one end is rotatably locked to the mounting plate 13, is rotatably locked to the side thereof. There is. And depending on the rotation angle of the rotating body 25,
Rotating force in the opposite direction is applied to the rotating body 25 with the dead center X as the boundary. The rotating body 25 can rotate left and right within the range of the elongated hole 26 independently of the switching plate 19, and the switching plate 19 can be rotated integrally with the rotating body 25 or independently within the range of the through hole 24 of the partition wall 17. It can be rotated left and right. The switching plate 19 disengages the tip 21 of the sliding rod 16 from the sliding rod 16 when the sliding rod 16 descends within the guide hole 18 and reaches the lowermost position in the center.
The tip 2 rotates together with the rotating body 25 by the springing force of the helical spring 28 and projects into the guide hole 18.
1 closes the passage of the guide hole 18 on the side from which the sliding rod 16 has descended, and causes the sliding rod 16 to ascend the ascending passage on the opposite side of the guide hole 18. Alternatively, the switching plate 19 and the rotating body 25 may be integrated. The outer circumferential surface 29 of the rotating body 25 is marked with a color-coded display, which can be seen through the display window provided in the outer box, and furthermore, even if this switch switch is installed upside down, the current connection state can be displayed. As can be seen, a rotary display body 34 of the same shape and size that is connected to this rotary body 25 by a connecting lever and rotates in the same way is provided on the back side, and similarly, other displays on the outer box Display the connection status from the window.

The intermediate portions of the switching levers 7, 7' attached to the operating shaft 6 for operating the switching are connected by penetrating shafts 38 to the ends of traction cores 40, 40' that protrude perpendicularly from a solenoid 39 attached to the bottom of the main body 5. The tip of a locking piece 14 that is pivoted and bent from the base end of one switching lever 7 and extended downward is connected to the other end of a trigger strip 42 that has one end fixed to the bottom of the main body 5. , the tip 43 of the switching lever 7 is always biased to rotate counterclockwise in FIG. In the case of manual switching operation, the operating lever 44 is fitted onto the protruding end 36 of the operating shaft 6 and rotated against the springing force of the triggering strip 42, as shown in FIG. In this case, the solenoid 39 is energized and the operating shaft 6 is similarly rotated.

Next, to explain the operation, when the operating shaft 6 is manually or automatically rotated in the direction of the arrow a in FIG. 8 from the state shown in FIG.
The sliding rod 16 of FIG. When it descends as shown in FIG. 10A and reaches the lowest end, that is, the central bent part 22 of the guide hole 18, as shown in FIG.
1 is disengaged, the switching plate 19 rotates slightly in the direction of the arrow b due to the spring force of the helical spring 28 together with the rotating body 25, and the tip 21 of the switching plate 19 is positioned on the left side of the guide hole 18 in the figure. Close the passage. During this time, the 8th
As shown in Figures 11 and 11, the contact rod 1
0 is lowered diagonally to the lower right in the figure together with the body plate 15, and the movable contact 4 first opens from the first power supply side contact 1 as shown in FIG. 9(b), and then as shown in FIG. 10(b). The load side contact 3 is opened to reach the neutral position shown in FIG. 11B, where it is not in contact with any of the contacts. The operations up to this point are performed by rotating the operating shaft 6 in the direction of arrow a while tilting the switching levers 7, 7' in the direction of arrow c in FIG. Next, when the operating shaft 6 begins to rotate back in the direction of the arrow d in FIG. Since the left side passage of the guide hole 18 is closed by the tip 21 of the switching plate 19, the moving rod 16 is guided to the right side and rises diagonally upward to the right. Then, the upper surface of the sliding rod 16 comes into contact with the cam surface 27 at the bottom of the rotating body 25 and pushes it up, and the rotating body 25 pushes it up against the expanding force of the helical spring 28 in the direction of the arrow e in FIG. When the helical spring 28 rotates while being compressed and passes the dead center X of the helical spring 28, as shown in FIG.
The expansion force is now in the opposite direction to the arrow e in Fig.
As shown in FIG. 14A, the sliding rod 16 reaches the upper right end of the guide hole 18 and stops. This joint point rod 10 also rises diagonally upward and to the right together with the body plate 15, as shown in FIGS. 12 to 14, respectively.
As shown in FIG. 13B, the movable contact 4 first contacts the load side contact 3, and then contacts the second power supply side contact 2.
Switching of the power supply is completed when it comes into contact with . Then, the power source is switched by repeating the same operation.

Next, to explain the control circuit when using the solenoid 39 and the switching mechanism of the switch in this control circuit, as shown in FIG. piece 46,
The notch 45 is pivoted so that its edges 47 and 48 substantially coincide with the lower edge of the guide hole 18. This switching piece 4
The angle of the V-shaped notch 6 is slightly narrower than the angle of the guide hole 18, so it is located slightly inward from the lower side of the guide hole 18, and the slider that has moved to the slopes on both sides of the guide hole 18. The switching piece 46 is pressed by the rod 16.
swings from side to side. By swinging the switching piece 46 to the right in the figure, the pair of pressing plate parts 37, 37' provided at the lower end part of the switching piece 46 is caused to face the partition wall 17 downward.
The contact protrusions 49 and 49' of the microswitches MS ₁ and MS ₂ attached to the microswitches MS 1 and MS 2 are pushed in, respectively.
The swinging of the switching piece 46 is limited to the range of relative movement between an elongated hole 51 bored at its upper end and a stopper 52 protruding from the partition wall 17 and inserted into this elongated hole 51. The switching piece 45 is connected to the stopper 52 and the elongated hole 51 by the expansion strip 53 which is locked at both ends.
are given rotational forces in opposite directions depending on their swing angles.

The micro switches MS ₁ and MS ₂ are interlocked as shown in Fig. 15, and have contacts MS ₁ a, MS ₂ a, and contacts, respectively.
It has MS ₁ b and MS ₂ b. H ₁ is a normally closed micro switch, which has a contact point H ₁ b, and a switch lever plate 5 that is pressed by the tip 43 of the switching lever 7.
4, when the contact projection 55 is pushed in, the circuit is opened.

The switch lever plate 54 is pivoted at its center to a supporting protrusion 56 fixed to the bottom of the main body 5, and has a pair of pressing protrusions 57, 58 protruding from the upper side at a distance from each other vertically. The lower tip faces into the bent part of the push plate 59, and when the tip 43 of the switching lever 7 contacts the lower pressing protrusion 58 and presses it down, it rotates and the push plate 59 presses the micro switch.
It is moved so as to push in the protrusion 55 of _H1 .

The pushing plate 59 has a horizontal portion 60 as shown in FIG.
, a downwardly bent bent part 61 following this, and an upright plate part 62 further following this, and a latch pawl 63 is protruded from the inner upper surface of the horizontal part 60 . movably passes through the support hole 65 of the support upright piece 64 protruding from the bottom of the main body 5, and since the support hole 65 is sufficiently large in the vertical direction, the horizontal portion 60 of the push plate 59 can be moved inside the support hole 65. It can swing up and down. An expanding strip 66 is interposed between the horizontal portion 60 of the pushing plate 59 and the bottom of the main body 5, so that the pushing plate 59 can swing vertically and return to its original state.

As a result, one pressing protrusion 58 of the switch lever plate 54 is pushed downward by the tip 43 of the switching lever 7, and the switch lever 54 is rotated to the left in FIG. Push in the protrusion 55 of switch _H1 , and at this time push plate 5
The latch claw 63 of No. 9 engages with the upper edge of the support hole 65,
Even after the left rotation of the switch lever plate 54 is finished and the right rotation starts, the push plate 59 does not return to its original state for a while, and then the switch lever plate 54 rotates clockwise and its tip touches the upper surface of the push plate 54. When the latch pawl 63 is removed from the upper edge of the support hole 65 by pressing it down, it returns to its original state while being pressed by the switch lever plate 54 and the projection 55.

The control circuit is configured as shown in FIG. 15, for example, and the second power supply side operating power is turned on from the state shown in FIGS. 3 and 4 in which the movable contact 4 is in contact with the first power supply side contact 1 side. Then, the normally open contacts MS ₁ a, MS ₂ a,
A voltage is applied to the rectifier Si via the normally closed contact H ₁ b,
Coil CC is energized, which causes iron core 40,4
0', rotate the swinging levers 7, 7' clockwise while energizing the triggering strip 42, and lower the sliding rod 16 at the position shown in FIG. 3 to the central bent part of the guide hole 18. Accordingly, the movable contact 4 moves away from the first power supply side fixed contact 1 to the central neutral position.
During this time, the contact protrusion 55 of the micro switch _H1 is pushed in by the push plate 59 moved by the rotation of the switching levers 7, 7', the micro switch _H1 opens its normally closed contact _H1b , and the solenoid coil CC
Cut off the excitation current. At this time, the latch claw 63 of the push-in plate 59 engages with the support hole 65 and cannot return, so the micro switch _H1 is held and remains open.

After waiting for energy to be released by the self-induction action of the solenoid coil C, the iron cores 40 and 40' are pulled out by the firing force of the triggering strip 42, and at the same time, the sliding rod 1 is pulled out.
6 is guided by the tip 21 of the switching plate 19 to the guide hole 1
8 on the right side in the figure, and on the way up, touches the edge 48 on the right side in the figure of the notch 45 of the switching piece 46 and presses it against the springing force of the pushing strip 53. By swinging the switching piece 46 to the center and right, the pressing plate portion 37 of the switching piece 46 separates from the contact protrusion 49 of the micro switch MS ₁ , and the pressing plate portion 37' presses the contact protrusion 49' of the micro switch MS ₂ , thereby closing those contacts. MS _1a ,
MS ₂ a opens and contacts MS ₁ b and MS ₂ b close. However, at this time, the push plate 59 is still latched and the contact H ₁ b of the micro switch H ₁ is open. After the switching piece 46 exceeds the maximum compression position of the pushing strip 53 during its swinging, a rotational force is applied to the switching piece 46 in the right direction in the figure. The lifting of the sliding rod 16 is completed,
During this time, the latch pawl 63 of the push plate 59 is removed by the switch lever plate 54, and the micro switch is activated.
The contact H ₁ b of H ₁ is closed, and the movable contact 4 is switched to the second power supply side contact 2 as shown by the phantom line in FIG.

In this state, when the first power supply side operation power is turned on, the contacts of micro switches MS ₁ and MS ₂
A voltage is applied to the rectifier Si via MS ₁ b, MS ₂ b, and micro switch H ₁ b, the solenoid coil CC is excited, the iron cores 40 and 40' are attracted, and the switching levers 7 and 7' are rotated. The sliding rod 16 located at the imaginary line in FIG. 3 is pulled down to the central bent portion 22 of the guide hole 18. During this time, the micro switch was
The normally closed contact H ₁ b of H ₁ opens, the solenoid coil CC is deenergized, the iron core 40 is restored, and the sliding rod 16 moves up the slope on the left side of the guide hole 18 in the figure. At this time, the sliding rod 16 is attached to the left edge 4 of the notch 45 of the switching piece 46.
7 and press it to swing the switching piece 46 to the left in FIG.
Close contacts MS ₁ a and MS ₂ a of MS ₁ and MS ₂ , and
Open MS ₁ b, MS ₂ b. At this time, the contact H ₁ b of the micro switch H ₁ is still open. Then, the sliding rod 16 further rises and completes its rise, the contact _H1b of the micro switch _H1 closes, and the movable contact 4 switches to the first power supply side contact 1 as shown by the solid line in Figure 4. .

As shown in FIGS. 4, 5, and 16, the solenoid 39 connects coils CC, CC, iron cores 40, 40' inserted into these, and these iron cores 40, 4.
0' and the switching levers 7, 7' on both sides, and a through shaft 38 forming a magnetic circuit between the iron cores 40, 40', and a magnetic frame 67 surrounding the coils CC, CC.
The solenoids are arranged so that their polarities are in series and the direction of the magnetic flux is as shown by the arrow in FIG. 16, so that a large starting force can be obtained with a small solenoid force. The conventional solenoid, as shown in FIG. 17, has a high minimum operating voltage and a small suction force.

In short, the present invention installs a load side fixed contact in the center between two different power supply side fixed contacts installed at a distance from each other, and selectively shorts one of the power supply side fixed contacts and the load side fixed contact. In a switching switch comprising a movable contact that moves in a substantially V-shape to make contact with and separate from the three fixed contacts, the substantially V-shape action is caused by protrusion of the iron cores of at least one pair of solenoids; The iron cores of these solenoids are connected by a through shaft that forms a magnetic circuit, the magnetic polarities of the pair of solenoids are made in series with each other, the through shaft and the movable contact are connected, and the iron cores of the solenoid Since the operation is transmitted to the movable contact, a large switching starting force can be obtained with a small solenoid, and a switching switch with a small size, simple structure, and reliable operation can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a conventional example, Fig. 2 is a front view showing an example of implementation of the present invention, Fig. 3 is a front view, Fig. 4 is a rear view, and Fig. 5 is a partially omitted plan view. figure,
6 is a cross-sectional view taken along the line A-A in FIG. 5 with some parts omitted; FIG. 7 is a side view with some parts omitted;
15 is a control circuit diagram, 16 is a side view showing the solenoid, and 17 is an explanatory diagram showing the operating sequence.
The figure is a side view showing a conventional solenoid. 1... First power supply side contact, 2... Second power supply side contact, 4... Movable contact, 38... Penetration shaft, 39...
Solenoid, 40, 40'... Iron core, CC... Solenoid coil.

Claims (1)

[Scope of utility model registration request] A load-side fixed contact is provided in the center between two different power supply-side fixed contacts that are spaced apart from each other, and the movable contact is freely movable and engaged along the inclined path of the approximately V-shaped guide hole. and in response to the reciprocating movement of the iron cores of the pair of solenoids, the three fixed contacts move in a substantially V-shape along the guide hole to alternately short-circuit any of the power supply side fixed contacts and the load side fixed contacts. A switching plate that can be brought into and out of contact with the contact and selectively closes either the left or right inclined passage of the guide hole to determine the direction of movement of the movable contact has its tip placed in the guide hole. The switching plate is provided so that it can be protruded and tilted to the left or right, and when the movable contact moves away from any of the fixed contacts, it is pushed by the movable contact and tilts alternately to the right or left to switch to either of the guide holes. The switching plate is provided with a switch plate that can close the inclined passage of
One end of a spring that biases it in the direction of selectively tilting it to the right or left is locked via a rotating body, and this spring alternately tilts the switching plate past the dead center in the middle of tilting the switching plate. The solenoid is provided so as to be inclined to the right or left, and the iron cores of the pair of solenoids are connected by a through shaft to form a magnetic circuit, so that the magnetic polarities of the pair of solenoids are in series with each other. Switch switch.