JP2506637Y2 - Switch contact device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a contactor device for a switch, and more particularly to a contactor device for an arc blow-out type switch.

[Prior Art] A conventional contact device for a switch will be described with reference to Figs. 7 and 8. FIG. 7 is a front view showing the fixed contact (1),
FIG. 8 is a partial cross-sectional view showing the fixed contactor (1) and the movable contactor (2) in a closed state. As shown in the figure, the fixed contactor (1) is divided into a plurality of pieces (for example, four pieces) by the groove (1a) in the direction perpendicular to the axis of the cylinder, and the root is planted on the pedestal (1d). A hole (1c) is provided in the center of the pedestal (1d) for gas communication, and a protrusion for contacting the movable contact (2) is provided inside the upper end of each divided piece (1e). (1b) is provided, and is configured to maintain a predetermined contact pressure with the fixed contact (2) by the elasticity of each piece (1e). The movable contactor (2) is a cylinder having a single diameter, and the tip end portion is hemispherical so as to facilitate the inserting operation with the fixed contactor (1).

[Problems to be Solved by the Invention] Since the contact device of the conventional switch is configured as described above, the movable contact (2) is in the same direction as the axial direction of the fixed contact (1). Since it can only operate, for example, the fifth
As shown in the figure, the movable contactor cannot be used for a switch that makes an arc motion, and the elasticity of the fixed contactor is used to obtain the contact pressure with the movable contactor, which causes arcing. In the contactor device of the container, the contact portion and the elastic portion have to be brazed with different materials, and there is a problem that the manufacturing is difficult and expensive.

The present invention has been made in order to solve the above problems, and provides a contact device for a switch, which has a degree of freedom in the moving direction of the movable contact and does not require elasticity in the fixed contact itself. Is intended to provide.

[Means for Solving the Problems] A contactor device for a switch according to the present invention is provided with a cylindrical body and a tip spherical body provided at one end of the cylindrical body and having a radius larger than that of the cylindrical body. A movable contactor that moves in an arc shape and is divided into at least two parts in the vertical direction, and the upper end is cylindrical with the upper end centered on the vertical surface where each divided member is in close contact A fixed contact that engages with the conductor at the lower end and has a void with an inner diameter larger than the smallest dimension with the minimum inner diameter equal to the diameter of the body, and engages with the lower end of the fixed contact Has an engaging portion for
A conductor formed in a shape that airtightly contacts the tip spherical portion of the movable contact when the movable contact is inserted and engaged, and the fixed contact divided into at least two parts are integrated with a predetermined force, and A spring that biases the fixed contact to maintain engagement with the conductor.

[Operation] The tip spherical portion of the movable contact is thrown in by pushing apart the divided pieces from the upper end of the gap of the fixed contact against the biasing force of the spring during the closing operation with the fixed contact, Contact with conductor. Since the inside of the void of the fixed contact is large enough to engage with the spherical end of the movable contact, each of the divided pieces of the fixed contact that is pushed and spread is The action restores the close contact state again. At the time of the opening / closing operation, similarly, the distal end spherical portion of the movable contact pushes against the spring and pushes apart the divided pieces of the fixed contact to separate them.

[Embodiment] An embodiment of a contactor device for a switch according to the present invention will be described.

FIG. 1 shows a vertical cross section of the fixed contactor (3), and FIG. 2 is a plan view of the fixed contactor (3) and the conductor (4). As shown in FIG. 2, the fixed contactor (3) is divided into two parts in the vertical direction, and is biased by a spring (5) with a predetermined pressure so as to be united. As shown in FIG. 1, the movable contactor (6) is composed of a spherical tip portion (6a) and a cylindrical body portion (6b) having a smaller radius than that, and is provided at the center of the fixed contactor (3). Approximate frustoconical void (3a)
Get stuck. The lower portion of the fixed contactor (3) engages with the conductor (4), and the central portion of the conductor (4) has a hole (4a) for contacting the tip spherical portion (6a) of the movable contactor (6) and A hole (4b) through which gas is conducted is provided. FIG. 3 shows a vertical cross section in a state where the fixed contactor (3) and the conductor (4) shown in FIG. 2 are not subjected to the biasing force of the spring (5). Engagement portions (3b) and (4c) are provided on the lower end circumference of the fixed contactor (3) and the upper outer periphery of the conductor (4), respectively, and the engagement portions (3b), (4c) and the spring are provided. Due to (5), the fixed contactor (3) and the conductor (4) are kept in the engaged state without coming off. In the close contact state in FIG. 2, the shape of the upper end portion (3c) of the void portion of the fixed contactor (3) has a shape similar to an ellipse or a rugby ball shape, and the dimension in the minor axis direction is the movable contactor ( It is set to be the same as the radius of the body portion (6b) of 6). As the spring (5), a leaf spring as shown in FIG. 4 bent into a C shape, or a wire rod as shown in FIG. 6 bent into an annular shape is used. C
In the case of the V-shape, the fixed contactor operates smoothly by aligning the opening with the direction of the dividing groove of the fixed contactor (3).

The fixed contactor (3), the conductor (4), the movable contactor (6) and the like are used by being attached to the switch shown in FIG. 5 (the spring (5) is omitted in the figure). In the figure, the conductor (4) is pressed into the cylinder (7) and holds the fixed contact (3). A nozzle (8) is fitted on the outside of the fixed contactor (3). A piston (9) for blowing out the insulating gas stored in the cylinder (7) is fitted to the rear part of the cylinder (7), and the piston (9) is linked by a pin (16). The link (10) is rotatably supported by the pin (17) on the link (10) and the link (12) by the pin (18) on the link (11). Also cylinder (7)
The link (13) is rotatably supported by the pin (21) on the, and the link (13) is rotatably supported.
Link (1) by pin (19) planted in link (13)
The guide groove (12a) in 2) is slidably fitted and supported. A spring (14) is attached between the hook (7a) of the cylinder (7) and the pin (19), and between the pin (20) and the pin (19) around the pin (20). A torsion spring (15) is attached. In FIG. 5, the movable contactor (6) is attached to the movable arm (22), and the pin (23) is attached to the movable side shaft terminal (25) via the boss (24).
It is rotatably attached by. A main movable contact (26) is rotatably attached to the boss (24), and is configured to be inserted into or separated from the main fixed contact (27). The main movable contact (26) is connected to the rod (2) by the pin (28).
9), and the movable arm (22) has an oval hole (2
2a) is provided and the oval hole (22a) is inserted into the pin (28).
Slides.

In the switch configured as described above, when the rod (29) is moved upward by the drive mechanism (not shown), the main movable contact (26) is rotated counterclockwise around the pin (23) together with the pin (28). It rotates and separates from the main fixed contact (27). However, the movable arm (22) does not move until the pin (28) contacts the upper end of the oval hole (22a) of the movable arm (22), and the movable contact (6) and the fixed contact (3) are in the closed state. It remains. When the rod (29) further moves upward in the figure, the tip spherical portion (6a) of the movable contactor (6) is divided into two fixed contactors (3) against the biasing force of the spring (5).
And spread it apart from the fixed contact (3). The link (13) is pin (21) in response to the movement of the main movable contact (26).
It starts to rotate clockwise around. Rotation of the link (13) clockwise causes links (12), (11) and (10)
The piston (9) linearly moves through the inside of the cylinder (7) from right to left in the figure via. The insulating gas or the like stored inside the cylinder (7) by the movement of the piston (9) is blown out from the hole (4b) of the conductor (4), so that the movable contact (6) and the fixed contact (3) are separated from each other. Blows out the arc that occurs during separation.

Next, by moving the rod (29) in the opposite direction, that is, in the downward direction in the figure, the main movable contactor (26) and the main fixed contactor (27) are moved slightly later in time and the movable contactor (6). ) And the fixed contactor (3) are introduced respectively. At this time, the piston (9) is restored to the state shown in the figure. Also in this closing operation, the tip spherical portion (6a) of the movable contactor (6) is inserted while pushing the divided fixed contactor (3) against the spring (5). The void (3a) of the fixed contactor (3) has the narrowest upper end, and the movable contactor (6) is inside.
Since the tip end spherical portion (6a) is large enough to be housed and engaged, the supporting tip spherical portion (6a) is housed in the space (3a) of the fixed contactor (3). Then, the two-divided fixed contactor (3) is brought into a close contact state as shown in FIG. 1 by the urging force of the spring (5). Here, the void (3
The opening of a) has an elliptical shape or a rugby ball shape, and the dimension of the opening in the short direction is made the same as that of the body portion (6b) of the movable contactor (6) to make fixed contact with the movable contactor (6). The airtightness of the movable contactor (6) and the conductor (4) when the child (3) is in the closed state is improved, and the arc can be extinguished efficiently by blowing out the insulating gas. Although the fixed contactor (3) is divided into two in this embodiment, it may be subdivided further.

[Advantage of the Invention] As described above, according to the present invention, the fixed contact is divided into at least two parts in the vertical direction, and the divided pieces are closely attached by the springs. The effect that no special processing is required and the manufacturing cost is reduced because it is not necessary, and that it can be applied to a switch of the type in which the movable contact moves in an arc shape as shown in FIG. Have.

[Brief description of drawings]

1 is a sectional view showing an embodiment of a contactor device for a switch according to the present invention, FIG. 2 is a plan view showing a fixed contactor (3) and a conductor (4), and FIG. 3 is a fixed contactor. FIG. 4 is a sectional view showing (3) and a conductor (4), FIG. 4 is a view showing an embodiment of a spring (5), and FIG. 5 is a state in which the embodiment of FIG. 1 is applied to an arc blow-out type switch. FIG. 6 is a view showing another embodiment of the spring (5), and FIGS. 7 and 8 are views showing a conventional contact device for a switch. In the figure, (3) is a fixed contact, (4) is a conductor, (5) is a spring, (6) is a movable contact, (6a) is a spherical tip portion, (6b).
Is the torso.

Claims (2)

(57) [Scope of utility model registration request] 1. A movable contact, which is composed of a columnar body and a tip spherical portion provided at one end of the columnar body and having a radius larger than that of the columnar body, and which moves in an arc, and a longitudinal surface. In the state where at least two divided members are in close contact with each other, the upper end with the vertical surface as the center is the minimum dimension portion having the minimum inner diameter equal to the diameter of the columnar body portion of the movable contact, and the lower end portion. A fixed contact having a void portion having an inner diameter larger than the minimum dimension of the upper end so as to engage with the spherical tip of the movable contact, and engages with the lower end of the fixed contact. A conductor formed in a shape that has an engaging portion for airtightly contacting with the tip spherical portion of the movable contact when the movable contact is inserted and engaged, and the at least two divided parts. The fixed contact is integrated with a predetermined force, Switchgear contact device comprising a spring, a biasing said fixed contact so as to maintain the engagement with the conductor et. 2. The spring according to claim 1, wherein the spring is formed by bending a plate-shaped spring material into a C-shape, and the opening is aligned with the direction of a groove for dividing at least one of the fixed contacts. A contact device for a switch according to claim 1 of the new patent registration.