JPS6326904Y2 - - Google Patents

Description

[Detailed explanation of the idea] 〔Technical field〕 This invention relates to an electromagnetic contactor.

[Background technology]

Conventional examples are shown in FIGS. 1 to 3. That is, in this electromagnetic contactor, a fixed iron core 2 with a coil 1 wound thereon is arranged at an intermediate position in the body A, a fixed contact 3 is arranged below it, and a movable frame 4 that can slide up and down is arranged on the movable iron core. 5 so that the movable core 5 faces the upper surface of the fixed core 2, and the movable frame 4
A movable contact 6 is attached to the front side of the fixed contact 3, and a pair of C-shapes are formed between the spring support protrusion 7 at the lower end of the movable frame 4 and the spring receiver 8 at the bottom side of the body A. The body 10 and both ends 11 of the return spring 9 are applied to provide a strong return force to the initial operation when the contact is opened.

This spring 9 is connected to the contact support portion 1 of the fixed contact 3 of the body A when the bottom cover 12 of the body A is opened.
3 is temporarily held on the lower surface of the body A, and the movable frame 4 is installed from the upper part of the body A to support it as shown in FIG. Easy to assemble and inspect.

However, this temporary holding of the spring 9 has the disadvantage that the work is troublesome because it is necessary to incorporate it into the body A in a spring-biased state.

Conventionally, both ends of the spring are connected to the joint between the movable frame and the movable iron core, and the body of the spring is rotatably engaged with the body to rotate the spring in reverse when loading the movable frame and the movable iron core. There were some devices in which the spring was installed in the return biased state (for example, Utility Model Application No. 54-50166). but,
It is difficult to assemble the spring because it requires a heavy movable frame and movable core to engage the spring with the body, and the body of the spring is located on both sides of the movable frame when loading the movable frame and movable core. Therefore, it is necessary to form a gap for the spring between the movable frame and the body. Therefore, there was a drawback that the movable frame had to be made smaller or the body had to be made larger.

[Purpose of invention]

The purpose of this invention is to provide an electromagnetic contactor in which a spring can be easily attached and does not require a gap between the movable frame and the body for the spring.

[Disclosure of invention]

The electromagnetic contactor of this invention includes a body, a movable frame that is attached to the body and opens and closes the contacts, a spring guide that is slidably supported by the body and presses the movable frame in the return direction, and a spring guide that presses the movable frame in the return direction. A C-shaped return spring whose both ends are rotatably attached to a guide, and a recess provided in the body to support the body of the spring are opened in the same direction as the return direction of the movable frame. a spring receiving portion facing the recess, one end protruding inward of the body in a direction perpendicular to the return direction than the spring receiving portion, and the other end rising in a direction approaching the recess. It is equipped with a spring temporary receiving part.

According to the configuration of this invention, when the spring guide is inserted into the body, the spring is guided by the spring temporary receiving part, and when the spring is reversed, it engages with the recessed part, and the spring guide can be biased in the return direction. . Therefore, the spring can be easily attached. Moreover, since the movable iron core is configured to be pushed in the return direction by the spring guide, there is no need for a gap for the spring between the movable frame and the body.

Embodiment An embodiment of this invention will be described based on FIGS. 4 to 6. In other words, this electromagnetic contactor is
A body 14, a movable frame 4 attached to the body 14 that opens and closes the contacts 6, a spring guide 17 that is slidably supported by the body 14 and presses the movable frame 4 in the return direction, and the spring guide 17. a C-shaped return spring 18 whose both ends 18a are rotatably attached;
Body part 1 of spring 18 provided in body 14
The spring receiving part 24 has a concave part 26 supporting the movable frame 4 opened in the same direction as the returning direction of the movable frame 4, and the one end part 23a facing the concave part 26 is opened in the direction perpendicular to the returning direction rather than the spring receiving part 24. body 1
4 and the other end 25 is in the recess 2.
6, and a spring temporary receiving part 23 that rises in the direction approaching 6.

As shown in FIG. 5, the body 14 has vertical guide protrusions 15, 15' formed on one opposing side of the bottom, and a spring consisting of a spring receiving part 24 and a spring temporary receiving part 23 on the other opposing side. Uke 1
6, 16' are formed.

As shown in FIG. 5, the spring guide 17 has a groove 21 formed in the vertical direction on one opposing side, and a spring engagement hole 22 formed between the end surfaces of the other opposing side, so that both ends 18a of the spring 18 can be rotated. It is attached so that it can move freely. The concave groove 21 is the guide protrusion 15,1.
5' so that it can slide freely.

The spring temporary support part 23 is a pair of plate-shaped bodies as an example, and is provided upright on each inner side of the body 14, and by cutting out the lower surface (bottom side) of the spring temporary support part 23, the other end is continuous with one end part 23a with a curved surface. 25.

The spring receiving parts 24 are arranged between the spring temporary receiving parts 23, respectively. Spring receiving part 2
As shown in FIG. 6, the mutual gap q between the spring temporary support portion 23 and the spring temporary support portion 23 is smaller than the wire diameter d of the spring 18 (q<d), and the gap between one side of the recess 26 and the other end portion 25 is smaller than the wire diameter d of the spring 18 (q<d). The distance L from the upper edge is set as L>d/2.

19 is a back damper, and 20 is a terminal. Further, since the same reference numerals as those in FIGS. 1 to 3 indicate the same parts as in FIGS. 1 to 3, the explanation thereof will be omitted.

This electromagnetic contactor has both ends 1 of a spring 18.
8a is engaged with the spring guide 17, insert the body 18b of the spring 18 into the one end 23 of the spring temporary receiving part 23 through the bottom opening 14a of the body 14.
a (indicated by the broken line in FIG. 6), and while the spring guide 17 is guided by the guide protrusions 15 and 15', push it in until the spring 18 is reversed. During this time, the body portion 18b of the spring 18 is
As shown in the figure, one end 23a of the spring temporary receiving part 23
The spring 18 slides inward due to the horizontal component force of the spring 18 (solid line state), is locked at the other end 25 until the spring 18 is in a horizontal state (dead center), and by further pushing the spring guide 17, the spring 18 is reversed from the inverted position to the return position,
As a result of the reaction, the body portion 18b jumps from the other end portion 25 to the recess 26 (as shown by the two-dot chain line), so that the spring guide 17 is supported by the contact support portion 13 of the body 14 using the recess 26 as a fulcrum. In this way, the installation of the spring 18 is completed. On the other hand, when the movable frame 4 is loaded from above the body 14, the movable frame 4
pushes the spring guide 17 and a return action is applied. Note that if the dimensional relationships d, q, and L are set as described above, the spring 18 will not come off due to the movement of the movable frame 4.

[Effect of idea]

According to the electromagnetic contactor of this invention, both ends of the spring are attached to the spring guide slidably supported by the body, and the body of the spring is engaged with the recess of the spring receiving part via the spring temporary receiving part. Spring installation is easier than in the past. Further, since the spring can be assembled into the body separately from the movable frame and the movable iron core, the work is easy and there is no need to form a gap for the spring between the body and the movable frame. Moreover, since one end of the spring temporary holder protrudes further into the body than the spring holder,
This makes it extremely easy to engage the spring body with the spring receiver, and the spring can be assembled with just one touch, making the work even easier.

[Brief description of the drawings]

Fig. 1 is a sectional view of the conventional example, Fig. 2 is a plan view of the spring, Fig. 3 is a partial sectional view of the body before the movable frame is attached, and Fig. 4 is a half sectional side view of an embodiment of the invention. FIG. 5 is an exploded perspective view of the main part thereof, and FIG. 6 is a sectional view of the main part showing the process of attaching the spring. 4...Movable frame, 6...Contact, 14...Body,
17... Spring guide, 18... Spring, 18a... Both ends, 18b... Body, 23...
...Spring temporary receiving part, 23a...One end part, 24...
...Spring receiving portion, 25...Other end portion, 26...Recessed portion.

Claims (1)

[Scope of utility model registration request] A body, a movable frame attached to the body that opens and closes contacts, a spring guide that is slidably supported by the body and presses the movable frame in the return direction, and both ends of the spring guide are rotatable. a C-shaped return spring attached to the body; a spring receiving part provided in the body and having a recess for supporting the body of the spring opened in the same direction as the return direction of the movable frame;
a spring temporary receiving part facing the recess, one end of which protrudes further inward from the body in a direction perpendicular to the return direction than the spring receiving part, and the other end rising in a direction approaching the recess; Equipped with an electromagnetic contactor.