JPS6214588Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of the contact drive mechanism of a so-called balanced armature type relay in which the armature rotates in a seesaw manner.

Generally, in order to prevent welding of the relay contacts, as shown in Figure 1, the amount of rotation of the armature 1 is increased so that the contacts 5 and 6 come into contact with each other, and then the contact spring 2 is
By pushing the contacts 5 and 6, the contacts 5 and 6 were made to slide against each other to obtain a wiping effect. However, in this conventional method, even though the inclination angle θ of the contact spring 2 increases when the contact spring 2 is pushed in, the movable contact 5 only almost rolls on the fixed contact 6 at the point of contact between the contacts 5 and 6. However, there were problems in that the amount of sliding was very small and an effective wiping action could not be obtained, and there was also a limit to the amount of rotation of the armature, making it impossible to obtain a large pushing amount. In view of the above-mentioned problems, the purpose of the present invention is to provide a wiping mechanism that utilizes the structure of a balanced armature type relay and can obtain a large amount of contact sliding even if the amount of pushing by the armature is small. .

The present invention will be described in detail below with reference to embodiment drawings. In FIG. 2, a contact spring 2 is disposed on the side of an armature 1 whose central portion is rotatably supported on a seesaw, and one end of the armature 1 is provided with a contact spring 2. A pressing protrusion 3 protruding from the side surface is opposed to a portion near the tip of the contact spring 2, and a hook arm piece 4 protruding from the side surface of the other end of the armature 1 is engaged with a portion near the fixed end of the contact spring 2. It is something that

Figure 3 shows in more detail the structure of the balanced armature type relay used in the present invention. The permanent magnet 8 is magnetized in a direction perpendicular to the two magnetic plates 7. Reference numeral 9 denotes a U-shaped yoke with a coil wound around its center, which is housed in the yoke storage recess 11 of the vessel body 10, and both sides of both end magnetic pole pieces 12 protruding upward are connected to both magnetic plates at both ends of the armature 1. It faces the inner side of 7. A separator plate 13 insulates and isolates the coil portion and the contact portion, and an armature rotation shaft 14 is provided upright on the upper surface of the separator plate.
15 is a coil frame, 16 is a movable contact terminal plate insertion hole,
17 is a fixed contact terminal plate insertion hole.

Next, the operation of the relay according to the present invention will be explained with reference to Fig. 4. Fig. a shows a state in which the armature rotates in the opposite direction and is stable, and the contacts 5 and 6 are open. When the armature rotates in the positive direction due to the excitation of the coil, the contact spring 2 is first pressed by the pressing protrusion 3 and rotates as shown by the arrow in Fig. b, and the movable contact 5
comes into contact with the fixed contact 6, and when the armature rotates further, the part of the contact spring 2 near the fixed end is locked by the hook arm piece 4, as shown in Figure c.
The central part of the contact spring 2 is bent in a complicated manner, and thereby the movable contact 5 is pulled in the direction of the arrow, resulting in a large sliding amount.

The present invention is constructed as described above, and utilizes the movement of both ends of the balance armature to press the part near the tip of the contact spring and lock the part near the fixed end, so that it is movable. The contact not only simply rolls on the fixed contact but also fully slides, which provides an effective wiping action and has the advantage that the amount of rotation of the armature at that time is small.

[Brief explanation of the drawing]

Figures 1 a, b, and c are explanatory diagrams of the operation of a conventional relay, Figure 2 is a schematic top view of the relay according to the present invention, Figure 3 is an exploded perspective view of the same, and Figure 4 a, b, and c are the same as the above. It is an operation explanatory diagram. 1 is an armature, 2 is a contact spring, 3 is a pressing projection, 4 is a hooking arm piece, 5 is a movable contact, and 6 is a fixed contact.

Claims (1)

[Scope of utility model registration request] A contact spring is arranged on the side of the armature, whose center part is pivoted so that it can freely rotate with a seesaw, and a fixed contact is arranged opposite to a movable contact provided on the outer surface of the tip of the contact spring, so that one end of the armature is A pressing protrusion protruding from the side surface is opposed to a portion of the contact spring near the tip, and a hook arm piece protruding from the side surface of the other end of the armature is engaged with a portion of the contact spring near the fixed end. A balanced amateur type relay.