JP2559388Y2 - Opening structure of manual switch - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a manual opening and closing operation in which the opening operation of a manual switch is performed by the urging force of an opening spring even if the rotation operation of a handle is rotated to a predetermined position and stopped. The present invention relates to an opening urging structure of a vessel.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 8 and 9, the opening / closing torque link mechanism of a manual switch has a handle shaft 1 rotatably provided in the switch fixed to a central portion of a handle 2 for manual operation. A central portion of the first handle link 3 and a central portion of the second handle link 4 substantially perpendicular to the first huddle link 3 were fixed in parallel with the handle 2, and a movable contact of a switch was attached. A contact shaft 5 is rotatably provided in the switch in parallel with the handle shaft 1;
A central portion of a contact shaft link 6 is fixed to the contact shaft 5, and the contact shaft link 6 is provided side by side with the second handle link 4, and an appropriate support member in a switch is provided at each end of the first handle link 3. The other ends of the open / close springs 7, 7 whose one ends are rotatably attached to 13, 13 are rotatably attached, respectively.

[0003] Pins 4a, 6a provided at one end of the second handle link 4 and one end of the contact shaft link 6, respectively, pass through the flow holes 9a, 9b at both ends of the closing link 8, and are inserted into the flow holes 9a or 9a. 9b slidably and rotatably connected within
A pin 4b provided at the other end of the second handle link 4 passes through the flow hole 11 at one end of the open link 10, and the other of the open link 10 is connected between the other end of the contact shaft link 6 and the contact shaft 5. A roller 12 is rotatably connected to the contact shaft link 6, and a roller 12 is provided at one end of a pin 4 b at the other end of the second handle link 4, and the roller 12 is freely contactable with the other end 6 b of the contact shaft link 6. It is made.

[0004] Fig. 8 shows the positional relationship of each part in the closed state of the switch. When the handle 2 for manual operation is turned counterclockwise from this state, the handle shaft 1
Also rotates counterclockwise. At the same time, the first handle link 3 and the second handle link 4 also rotate integrally with the handle shaft 1. While the opening / closing springs 7 are compressed and stored by the rotation of the first handle link 3, the rotation of the second handle link 4
The second handle link 4 is freely rotated irrespective of the contact shaft link 6 by being absorbed by the flow holes 9a and 9b of the closing link 1 and the closing link 8. When each of the opening / closing springs 7 reaches a toggle point where the opening / closing springs 7 on both sides and the first handle link 3 are substantially aligned, the roller 12 at the other end of the second handle link 4 is turned to the other end 6b of the contact shaft link 6.
In this case, the contact shaft link 6 and the contact shaft 5 integral therewith rotate, whereby the movable contact of the switch is separated from the fixed contact (not shown).

[0005] After the toggle point, the second handle link 4 is rapidly rotated by the urging force of each open / close spring 7, and the contact is rapidly opened via the opening link 10 and the contact shaft link 6. This open state is shown in FIG. Completion of the opening is regulated by a stopper (not shown) separately provided on the contact shaft 6, and the open state is maintained by the accumulating force of each open / close spring 7 via the opening link 10.

In order to open the switch using the manual operation handle 2 from the open state of FIG. 9, the manual operation handle 2 is turned clockwise about the handle shaft 1, and at the same time, the first The handle link 3 and the second handle link 4 also rotate integrally with the handle shaft 1. The second handle link 4 rotates while each opening / closing spring 7 is compressed and stored by this rotation. However, this rotation is absorbed by the flow hole 9a of the closing link 8, and the contact axis link 6 does not move. Next, a pin 4 provided at one end of the second handle link 4 at the inner peripheral end of the flow hole 9a of the input link 8
As a result, the contact shaft 5 starts to rotate via the contact shaft link 6 with the movement of the handle 2. The rotation of the contact shaft 5 causes the movable contact to move toward the fixed contact (not shown).

When the movable contact comes near the entrance of the arc-extinguishing chamber of the fixed contact, each opening / closing spring 7 passes through a toggle point, and the second handle link 4 is rapidly rotated by its releasing force, and the closing link 8 is turned on. , The contact shaft 6 rotates rapidly and the movable contact is inserted into the fixed contact (not shown).
The completion of the closing is regulated by a stopper (not shown) separately provided on the contact shaft, and the closing state is maintained by the accumulating force of each open / close spring 7 via the closing link 8.

[0008]

However, in the case of this conventional structure, when opening from the closed state, the handle 2 for manual operation is turned, and the first handle link 3 and the two opening / closing springs 7, 7 are connected. When the handle is stopped at a so-called dead point, the switch is not opened. Therefore, the operator must turn the handle for manual operation to the end. However, there is a risk that the switch may be opened at the relevant location and the operation may be stopped, whereby the arc may continue between the contacts and the contacts may be damaged.

Therefore, in the present invention, in such a manual switch, even if the rotation operation of the handle for manual operation is stopped by rotating to a predetermined position, that is, a so-called dead center, the opening operation is automatically performed. Provide an open biasing structure to complete,
It is intended to solve the above problems.

[0010]

According to the present invention, in the above-mentioned conventional opening / closing torque link mechanism, a rotation supporting piece is rotatably provided at one end of the second handle link and one end of the contact shaft link, respectively. An opening spring is provided between the two rotation supporting pieces, the opening spring being biased to draw the second handle link and the contact shaft link.

[0011]

In the present invention, when the opening operation is performed from the closed state, if the handle for manual operation is turned counterclockwise, the handle shaft is also rotated counterclockwise. At the same time, the first handle link and the second handle link also rotate integrally with the handle shaft. Due to the rotation, the second handle link rotates while the open / close springs provided at both ends of the first handle link are compressed and stored. In this case, the movement of the second handle link is absorbed by the flow holes of the open link and the flow holes of the closing link, and the contact axis link does not move. Then, by turning the handle for manual operation, when the opening / closing springs on both sides and the first handle link reach a toggle point where they are substantially aligned, the roller at the other end of the second handle link hits the other end of the contact shaft link, and When pressed, the contact shaft link and the contact shaft integral therewith rotate.

As a result, the static frictional force of the movable contact of the switch becomes a kinetic frictional force and starts moving away from the fixed contact. At this time, the force of the release spring is acting, and one end of the contact shaft link is drawn to one end of the second handle link. Therefore, even when the rotation of the handle for manual operation is stopped, the contact shaft is rotated by the force of the release spring, and the movable contact is released from the fixed contact. When the handle for manual operation is further turned, the first handle link is tilted, and the contact shaft is not moved via the open link by the accumulating force of the open / close springs provided at both ends, and the open state is maintained.

When the manual operation handle is turned clockwise in the open state, the movable contact does not move at first when the handle is turned clockwise, and when the handle is further turned, the movable contact starts to move and reaches the vicinity of the entrance of the isolated room. When it moves, it becomes the above-mentioned dead center position. After that, when the restraining force of the manual operation handle is removed, the force of the opening / closing spring automatically increases via the second handle link, closing link, and contact axis link. Then, the contact shaft rotates, and the movable contact is applied to the fixed contact.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the method and apparatus according to the present invention. FIG. 1 shows a closed state of the open / close toggle link mechanism in the manual switch. This opening / closing toggle link mechanism has the same basic structure as the conventional opening / closing toggle link mechanism shown in FIGS. 8 and 9 and includes the following members. The pin 4a at one end of the second handle link 4 and the pin 6a at one end of the contact shaft link 6 are respectively connected to the rotation support pieces 14, 1
5 are provided rotatably, and these two rotation support pieces 14,
15, an open spring 16 urged to draw the second handle link 4 and the contact shaft link 6 is provided.
A locking piece 17 is provided in the switch for locking one end of the switch.

FIG. 6 is a partial sectional view of the switch 18 provided with the opening / closing torque link mechanism in a closed state.
A movable contact 19 is fixed to the contact shaft 5, and a fixed contact 21 connected to one side of the bushing 20 is provided in the isolated room 22, and the movable contact 19 is fixed in the isolated room 22.
Has been thrown in. Also, as shown by the two-dot chain line in FIG.
A contact pullback spring 25 is provided between a link 23 separately provided on the contact shaft 5 and a metal fitting 24 attached to an appropriate support.
And a moment in the opening direction (counterclockwise) is always applied to the shaft 5 by the force of the contact return spring 25.

In order to open the switch from the closed state of the opening / closing torque link mechanism in this embodiment, turning the manual operation handle 2 counterclockwise in FIG. 1 from this state, the handle shaft 1 is similarly turned counterclockwise. Rotate in the direction. At the same time, the first handle link 3 and the second handle link 4 also rotate integrally with the handle shaft 1. The rotation of the first handle link 3 causes the opening / closing spring 7 to rotate.
Is rotated and the second handle link 4 rotates. Thus, even if the second handle link 4 rotates, the flow hole 11 of the open link 10 and the flow hole 9a of the closing link 8,
The rotation is absorbed by 9b, and the contact axis link 6 does not move. Then, when the handle shaft 1 is rotated by about 31 degrees, one end of the rotation support piece 14 hits the locking piece 17 and the release spring 16 is pulled and starts to accumulate. However, at this time, the contact shaft 5 does not rotate due to the static friction force of the movable contact 19.

Each opening / closing spring 7 has passed a toggle point where the opening / closing springs 7 on both sides and the first handle link 3 are substantially aligned, and as shown in FIG. The contact 12 corresponds to the other end 9b of the contact shaft link 6, and the contact shaft link 6 and the contact shaft 5 integral therewith begin to rotate, whereby the movable contact 19 of the switch 18 starts to separate from the fixed contact 21 (not shown). ).

At this time, the static frictional force of the movable contact becomes a dynamic frictional force. As shown in FIG. 3, one end of the rotating support piece 14 is locked by the locking piece 17, and the contact shaft link is pulled by the pulling force of the opening spring 16. 6 is pulled so as to approach one end of the second handle link 4, and the contact shaft 5 integral with the contact shaft link 6 is rotated. Therefore, even if the rotation of the manual operation handle 2 is stopped, the contact shaft 5 rotates. Then, the movable contact 19 separates from the fixed contact 21 and is opened. Further, in the process from the state shown in FIG. 3 to the state shown in FIG. 4, a moment for rotating the contact shaft 5 to the position shown in FIG. In this case, as shown in FIG.
7, one end of the second handle link 4 and one end of the contact shaft link 6 are in proximity to each other due to the pulling force of the opening spring 16.

When the handle 2 for manual operation is further turned, a stopper (not shown) separately provided on the contact shaft 5 is provided.
The rotation is regulated by this, and in that state, as shown in FIG.
The first handle link 3 is inclined, and the contact shaft link 6 and the contact shaft are connected via the second handle link 4 and the open link 10 rotatably connected to the second handle link 4 by the accumulating force of the open / close springs 7 provided at both ends. 5 keeps the open state without moving.
FIG. 7 shows the movable contact 1 of the switch 18 in the open state.
9, the state of the fixed contact 21 and the handle 2 for manual operation is shown.

When the manual operation handle 2 is turned clockwise in the opening operation shown in FIG. 5, the movable contact 19 does not move at first, and when the handle 2 is further turned, the movable contact 19 starts to move. When the door 2 has moved to the vicinity of the entrance of the extinction chamber 22, the opening / closing spring 7 is located at a so-called dead center. The contact shaft 5 automatically rotates via the handle link 4, the closing link 8, and the contact shaft link 6, and the movable contact 19 is fixed to the fixed contact 2.
Entered into 1.

[0021]

The present invention has the above-described structure. In a manual switch, even if an operator stops the rotation operation of the handle for manual operation to a predetermined position, that is, a so-called dead point, the automatic operation can be performed automatically. The opening operation of the opening / closing toggle link mechanism is continuously continued, and the movable contact of the switch can be quickly and reliably opened from the fixed contact, so that the contact is not damaged and the operation safety is enhanced.

[Brief description of the drawings]

FIG. 1 is an explanatory front view showing a closed state of an opening / closing toggle link mechanism of the present invention.

FIG. 2 is an explanatory front view showing a process in which the opening / closing toggle link mechanism of the present invention is opened from the closed state.

FIG. 3 is an explanatory front view showing a process in which the opening / closing toggle link mechanism of the present invention is opened from the closed state.

FIG. 4 is an explanatory front view showing a process in which the opening / closing toggle link mechanism of the present invention is being opened from the closed state.

FIG. 5 is an explanatory front view showing an open state of the open / close toggle link mechanism of the present invention.

FIG. 6 is a partial sectional front view showing a closed state of the switch provided with the switching toggle link mechanism of the present invention.

FIG. 7 is a partially sectional front view showing an open state of a switch provided with the switching toggle link mechanism of the present invention.

FIG. 8 is an explanatory front view showing a closed state of a conventional open / close torque link mechanism.

FIG. 9 is an explanatory front view showing an open state of a conventional open / close torque link mechanism.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Handle shaft 2 Handle for manual operation 3 1st handle link 4 2nd handle link 5 Contact axis 6 Contact axis link 7 Opening / closing spring 8 Closing link 9a Flow hole 9b Flow hole 10 Open link 11 Flow hole 12 Roller 14 Rotation support piece 15 Rotation support piece 16 Release spring

Claims (1)

(57) [Scope of request for utility model registration] 1. A central portion of a handle for manual operation is fixed to a handle shaft rotatably provided in a switch, and a central portion of a first handle link is provided in parallel with the handle, and substantially perpendicular to the huddle link. A central portion of the second handle link is fixed, and a contact shaft to which a movable contact of the switch is attached is rotatably provided in the switch in parallel with the shaft,
A central portion of the contact shaft link is fixed to the contact shaft, and the contact shaft link is provided side by side with the second handle link, and one end of each of the first handle link is pivoted at an appropriate support in a switch at both ends of the first handle link. The other ends of the freely mounted open / close springs are rotatably mounted, respectively, and one end of the second handle link and one end of the contact shaft link are slidably and rotatably connected to the flow holes at both ends of the closing link, respectively. An open / close torque that slidably and rotatably connects the other end of the second handle link to a flow hole provided at the other end of the open link that has one end rotatably connected to the other end of the contact shaft link. In the link mechanism, a rotation support piece is rotatably provided at one end of the second handle link and one end of the contact axis link, and the second handle link and the contact axis link are provided between these two rotation support pieces. To attract Characterized in that a-energizing has been opening spring, opening biasing structure of a manual switch.