JPS5929307Y2 - switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improvement of a switchgear having a movable contact that is tiltably supported within a window of a movable contact support.

Conventionally, in such switchgear, when the movable contact attached to both ends of the movable contact and the fixed contact provided opposite to the movable contact are simply butt-contacted, dust adhering to the surface of the contact may be removed. Since the contact cannot be removed, contact failure is likely to occur, and contact reliability is poor.

Conventionally, in order to solve this problem, a movable contact is provided with a protrusion on the contact surface, and this protrusion slides on the contact surface of the fixed contact to perform self-cleaning.

However, such conventional devices have the disadvantage of requiring specially shaped movable contacts, resulting in high costs.

This invention aims to improve the above-mentioned drawbacks.

An embodiment of this invention will be described below with reference to FIGS. 1 to 4.

In the figure, 1 is a movable contact (hereinafter referred to as a support), 1
a to 1h and 1 b' to l e/ are constituent parts of the support body 1 integrally molded from an insulating material, 1a is a window, 1b, 1b'
are both side surfaces of the window 1a, 1c to 1f, 1c' to 1f' are notches provided on the peripheral outer surface side of the side surfaces 1b and 1b',
1g is a stepped portion at the notch ends of the notched portions 1C to lf and 1c'-1f', and 1h is a shoulder portion on the opposite surface side of the stepped portion 1g.

2 is a movable contact, 2a. 2a' is a convex portion provided perpendicularly to the longitudinal direction of the movable contact and facing only one side near the center; 3 is a movable contact fixed to the movable contact 2;
4 is a pressing spring that presses the movable contact 2 within the window 1a and applies a predetermined contact pressure between the contacts; 5 is a fixed contact; 6
is a fixed contact fixed to a fixed contact.

The operating state of this switchgear configured as above is described in the sixth section.
This will be explained with reference to Figures A to 6C.

In the figure, the movable contact 2 attached to the window 1a of the support 1 engages the protrusion 2a with the notch 1C, and the protrusion 2a,'
is engaged with the notch 1c' (not shown) to have the effect of preventing removal from the support body 1.

Now, the support 1 is being moved by an external force such as an electromagnet (not shown).
When moving in the direction F shown by the arrow in FIG. 6A, the movable contact 2 moves together with the support, and the movable contact 3 comes into contact with the fixed contact 6 as shown in FIG. 6B.

When the support body 1 further moves, the movable contact 3 comes into contact with the fixed contact 6, and the movable contact 2 is pushed up against the spring pressure of the push spring 4, as shown in FIG. 2a, 2a
' collides with the step 1g at the end of the engaging notches 1c and 10', and finally the movable contact 2 tilts using the shoulder 1h on the side of the notches lc and lc' as a fulcrum, and the movable contact 3 slides on the contact surface of the fixed contact 6.

Note that, as shown in FIG. 7, in a normally closed type opening/closing device, a notch le is provided on the upper side of the window 1a of the support body 1.

By using 1e' or 1f, if', it is possible to similarly perform a sliding motion on the contact surface.

Another embodiment of this invention is shown in FIGS. 8 and 9.

In the figures, the same reference numerals as in FIGS. 1 to 5 indicate the same or corresponding parts, and 7 indicates the notch 1 c in the above embodiment.
, le, 1c', 1e' instead of the side 1b with the notch 7, the support with the side 7b with 7',
The notch 7k and TV are the notch 1c in the side surface 1b.
, 1e and ic/, ie/ are cut out from the bottom to the top of the window 1a.

Reference numeral 8 denotes a spring receiver formed in a U-shape and supporting the push spring 4. The push spring 4, the spring receiver 8, and the movable contact 9 are overlapped as shown by arrows G and H in FIG. 7, and are supported. body 7
When the spring receiver 80 is inserted, for example, as shown by arrow J, the ear-shaped protrusions 8a, 8a' and 8b, 8b' on both wings of the spring receiver 80 become cutouts 1d, 1d, respectively.
' and 7, 7 to'.

Next, when the support body 7 moves in the direction of arrow F due to an external force, the movable contact 9 is pushed up against the spring pressure of the push spring 4, as in the case of FIGS. 6A to 6C. Finally, the movable contactor 9 abuts against the step portion 1g on the side of the notch portions 1d and 1d′ via the convex portions 13a and 3a′ of the spring receiver 8, and is tilted using the shoulder portion 1h as a fulcrum. As a feature of this invention, sliding motion can be performed on the contact surface.

As described above, according to this invention, the contact moves by engaging with the notch provided on one side of the support, and during the closing operation, the contact is moved to the end of the notch provided on one of the sides. By tilting the movable contact against the fixed contact, the movable contact slides on the fixed contact and performs a self-cleaning action.

Moreover, since the movable contact has a standard shape such as an arcuate or semicylindrical cross section, it is possible to provide an inexpensive and highly reliable switching device.

[Brief explanation of the drawing]

Figures 1 to 7 show an embodiment of this invention. Figure 1 is a front view of the main part of the movable contact support, Figure 2 is a sectional view taken along the line ■-■ of Figure 1, and Figure 3A Figures to Figures 3C are cross-sectional views of I [A-IIIA to TIIC-IITC in Figure 1, and Figure 4
The figure is a perspective view of the movable contact, FIG. 5 is a perspective view of this embodiment, FIGS. 6A to 6C are explanatory diagrams showing the operating state of the contact, and FIG. 7 is a diagram showing the main parts of the normally closed contact. A front view showing the configuration, and FIGS. 8 and 9 show other embodiments. FIG. 8 is a perspective view showing the main components of the opening/closing device, and FIG.
FIG. 3 is a perspective view of the support body taken along the line X-■. In addition, the same reference numerals in the figures indicate the same or equivalent parts, 1 is a support, 1a is a window, 1g is a step, 2 is a movable contact, 2a
, 2a' is a convex portion, 3 is a movable contact, 4 is a push spring, 6
is a fixed contact.

Claims (1)

[Scope of utility model registration request] A switchgear including a movable contact that is pressed and supported by a push spring attached to a window of a support body, and a fixed contact that contacts the movable contact that is fixed to the movable contact,
An opening/closing device characterized in that a convex portion is formed on the side of the movable contact, and a step portion is provided in the window of the support body to abut against the convex portion and tilt the movable contact.