JPH0224198Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to an electromagnetic relay, and more particularly to a balanced armature type electromagnetic relay having a rotating support portion inside a coil bobbin.

(b) Background of the technology There is a desire to create electromagnetic relays with high sensitivity and low power consumption that can be incorporated into various electronic devices. A balanced armature type electromagnetic relay is known as an electromagnetic relay that is efficient and suitable for achieving such high sensitivity and low power consumption. However, conventional balanced armature type electromagnetic relays have a large number of component parts, and various improvements have been attempted to address this problem.

(c) Prior Art and Problems Figure 1 is a diagram showing the principle of a conventional electromagnetic relay using a four-gap balanced armature system having a rotating support section inside the bobbin.

The rotation support portion 2 of the armature 1 is located inside a coil bobbin 4 around which a coil 3 is wound, and both ends of the armature 1 passing through the coil bobbin 4 are disposed between opposing yokes 6 and 7. When the electromagnetic relay is in the recovery state, one end 1 of the armature 1 is
The end a is attracted to the yoke 6 side, and the other end 1b is attracted to the yoke 7 side for stability. Next, when a current flows through the coil 3 to excite the armature 1 and the electromagnetic relay is in operation, magnetic poles are generated at both ends of the armature 1 that repel the force of the magnet 5, and the armature 1 rotates around the rotation support 2 as a fulcrum. The moving end 1a is attracted to the yoke 7 side, and the other end 1b is attracted to the yoke 6 side and stabilized. A card 8 is inserted into one end 1a of the armature 1, and by turning on and off the current flowing through the coil 3, the card 8 drives a movable contact spring (not shown) to open and close the switch. I do. Furthermore, armature 1
A mechanism 9 is provided at both ends of the yokes 6 and 7 to prevent them from falling off.

Such an electromagnetic relay requires that the rotation support portion 2 of the armature 1 is provided inside the coil bobbin 4, and that a mechanism for preventing the armature 1 from falling off is provided separately.

Further, FIG. 2 is a principle diagram of a conventional balanced armature type electromagnetic relay in which a rotation support portion is provided outside the bobbin.

The armature 11 is located inside a coil bobbin 14 around which the coil 3 is wound, one end 11a is disposed between opposing yokes 16 and 17, and the other end 11b is rotated by the yokes 16 and 17. freely held. When the electromagnetic relay is in the recovery state, one end 11a of the armature 11 is
is attracted to the yoke 16 side, but when the armature 11 is excited by current flowing through the coil 3 and the electromagnetic relay is in operation, the armature 11
Magnetic poles that repel the force of the magnet 5 are generated at both ends of the armature 11, and the armature 11 rotates about the rotational support portion 11b as a fulcrum, and one end 11a of the armature 11 is attracted to the yoke 17 side. A card 8 is inserted into one end 11a of the armature 11,
By turning on and off the current flowing through the coil 3, the card 8 drives a movable contact spring (not shown) to open and close the switch.

Although this electromagnetic relay has a reduced number of parts because the yokes 16 and 17 serve as both a rotational support and a fall-off prevention mechanism, it has the disadvantage that it is difficult to construct an efficient four-gap balanced armature system.

(d) Purpose of the invention The purpose of the invention is to provide a four-gear balanced armature type electromagnetic relay that has a small number of component parts, is highly efficient, and is suitable for achieving high sensitivity and low power consumption. The goal is to provide a structure for

(e) Structure of the invention The purpose of this invention is to provide a balanced armature type electromagnetic relay having an armature rotatably supported inside a coil bobbin, the coil bobbin being integrally formed, and the armature having a coil bobbin at one end. The coil bobbin is inserted into the coil bobbin from one side by providing a step-shaped protrusion that serves as a stopper and a groove in the rotary support part when inserted into the coil bobbin. Achieved by an electromagnetic relay characterized in that a support body is inserted from the other side of the coil bobbin and has a protrusion that engages with a recess of the armature and rotatably supports the armature and prevents it from falling off the coil bobbin. be done.

(f) Examples of the invention Examples of the invention will be explained below with reference to the attached drawings.
Figure 3a is a perspective view showing one embodiment of the present invention.
Figure b is a modification thereof, Figure 4a is a perspective view showing another embodiment of the present invention, Figure 4b is a modification thereof, and Figure 5 is a diagram for explaining the operation of the electromagnetic relay according to the present invention. 6 are perspective views showing the appearance of the electromagnetic relay according to the present invention.

In Fig. 3a, the armature 22 has a V on the side.
The coil bobbin 20 has a groove 23 in the shape of a letter, and one end thereof is provided with a stepped protrusion 24 that is larger than the hole 21 through which the armature in the center of the coil bobbin 20 passes. On the other hand, the support body 25 includes a pair of opposing support pieces 27 having a V-shaped protrusion 26 that engages with the V-shaped groove 23, and a claw 28 that engages with the side wall of the coil bobbin 20. When this support body 25 is attached to the hole 21 that passes through the armature in the center of the coil bobbin 20 after coil winding, and the armature 22 is attached from the opposite side, a V-shaped groove 23 is formed.
The armature 22 is rotatably supported by engagement with the V-shaped projection 26, and the armature is prevented from falling off by the stepped projection 24 of the armature and the claw 28 of the support.

The armature 29 in FIG. 3b also has a groove 30 on the side surface and a coil bobbin 2 at one end.
Hole 21 for passing the armature in the center of 0
A larger stepped protrusion 31 is provided, and the support 32 is also provided with a support piece 34 having a protrusion 33 that engages with the groove 30 and a claw 35 that engages with the side wall of the coil bobbin 20. By mounting the support body 32 and the armature 29 in the hole 21 of the coil bobbin 20, the same effect as in the embodiment described above can be obtained.

4 and 5 are perspective views showing the appearance of a four-gap balanced armature type electromagnetic relay incorporating the armature support according to the present invention.

In the figure, both ends 22a and 22b of the armature 22 passing through the coil bobbin 20 are disposed between the opposing yokes 51 and 52, and when the electromagnetic relay is in the recovery state, they are below the coil 53 and are located between the yokes 51 and 52. One end 22a of the armature 22 is attracted to the yoke 51 side and the other end 22b is attracted to the yoke 52 side by the force of the magnet 54 sandwiched between the armatures 52 and 52, thereby stabilizing the armature 22. At this time, the card 55 inserted into the armature 22 presses the movable portion 56 against the break-side fixed contact 57. Next, when a current flows through the coil 53 to excite the armature 22 and the electromagnetic relay is in operation, magnetic poles are generated at both ends of the armature 22 that repel the force of the magnet 54, and the armature 22 rotates about the rotation support part 22c as a fulcrum. The moving end 22a is attracted to the yoke 52 side, and the other end 22b is attracted to the yoke 51 side and stabilized. At this time, the card 55 presses the movable portion 56 against the make side fixed contact 58.

Since the above-mentioned electromagnetic relay uses the armature support of the present invention as a rotating support for the armature, there is no need to add a mechanism to prevent the armature from falling off, which contributes to a reduction in the number of parts of the electromagnetic relay. It facilitates the construction of Yap balanced armature electromagnetic relays and contributes to the realization of highly efficient electromagnetic relays.

(g) Effects of the invention As described above, the invention provides a four-gear balanced amplifier that has a small number of components, is highly efficient, and is suitable for achieving high sensitivity and low power consumption. A structure of a multi-layer electromagnetic relay can be provided.

[Brief explanation of the drawing]

Fig. 1 is a principle diagram of a conventional electromagnetic relay with a rotating support part provided inside the bobbin, Fig. 2 is a principle diagram of a conventional electromagnetic relay with a rotating support part provided outside the bobbin, and Fig. 3a is a diagram of the principle of an electromagnetic relay with a conventional rotating support part provided outside the bobbin. FIG. 3B is a perspective view showing one embodiment, FIG. 3B is a modification thereof, FIG. 4 is a diagram for explaining the operation of the electromagnetic relay according to the present invention, and FIG. 5 is an external view of the electromagnetic relay according to the present invention. FIG. In the figure, 20 is a coil bobbin, 21 is a hole through which the armature passes, 22 and 29 are armatures, 22a and 22b are both ends of the armature,
22c is a rotating support part, 23 is a V-shaped groove, 24 and 31 are stepped projections, 25 and 32 are supports, 26
27 is a support piece having a V-shaped projection; 28 and 35 are claws that engage with the side wall of the coil bobbin; 30 is a side groove; 33 is a projection; 34 is a support piece having a projection; 51 and 52 are support pieces having a projection; York, 5
3 is a coil, 54 is a magnet, 55 is a card,
56 is a movable part, 57 is a fixed contact on the break side, 58
indicates the make-side fixed contact 58.

Claims (1)

[Scope of utility model registration request] In a balanced armature type electromagnetic relay having an armature that is rotatably supported inside a coil bobbin, the coil bobbin is integrally formed, and the armature has a stepped protrusion at one end that serves as a stopper when inserted into the coil bobbin. A groove is provided in the rotation support portion and inserted from one side of the coil bobbin, and a projection that engages with the recess of the armature is provided at the tip of the pair of support pieces facing the claw that engages with the side wall of the coil bobbin. An electromagnetic relay characterized in that a support body is inserted from the other side of the coil bobbin to rotationally support the armature and prevent it from falling off the coil bobbin.