JPH0594935U - Electromagnetic relay - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To improve magnetic efficiency and simplify the configuration to reduce the generation of slight noise and temperature rise during operation, and to improve its productivity. [Configuration] The movable iron piece M is formed sectional inverted L-shape bent is c ₃ notch in the middle, the engagement of the engaging portion k ₃ extending notch lower front, notch c ₃ Engagement parts k ₄ whose front ends are bent above the parts k ₃ are formed into elastic plates S, and a thin plate made of synthetic resin in which a plurality of notches c ₄ are formed behind the elastic parts S. An electric wire holding plate H and an insulating base T, which has a movable contact t ′ at its tip and is embedded and fixed as a movable contact Sn having a rear end as a connection terminal, are sequentially stacked and fixed to each other. The upper end is on the outside and the lower end is notched on the outside of c _1.
Via a fixed fixing plate K bending is fixed to exhibit a cross-sectional U-shaped downward, the lower surface S engaging portion k ₄ is engaging portion k ₁ of the yoke Y of the elastic piece KS, elastic piece The engaging portion k _{3 of} S is loaded so as to be pressed against the back surface of the engaging portion k ₂ extending downward through the notch c ₁ of the yoke Y.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a concrete structure of an electromagnetic relay, in particular, a yoke, a movable iron piece loosely fitted in the yoke, and an elastic piece elastically holding the movable iron piece on the yoke.

[0002]

[Prior Art]

 A known type of this type of electromagnetic relay will be described with reference to FIG. 3 showing only a main part as a side view. An Y-shaped yoke Y and a hinge (not shown) fixed to the upper end of the yoke. A movable iron piece M having ears e bent and formed on both sides is rotatably attached to a shaft, and a spring S ′ is attached to one end of the movable iron piece. Then, as soon as the coil C is energized, the magnetic pole P is excited, and the movable iron piece M is joined to the magnetic pole P against the elastic force of the spring S'as shown by the arrow in the figure.

[0003]

[Problems to be solved by the device]

 However, in the above configuration, since the ears e formed on both sides of the movable iron piece M are pivotally attached to the hinge fixed above the yoke Y, the magnetic pole P is not attached. In order to prevent contact due to residual magnetism during energization, the gap g (usually 0.3 to 0.5 [mm]) must be set, and the formation of the gap g leads to a decrease in magnetic efficiency. Of course, the sprinkle S'which is arranged on the side of the yoke Y has little space when the installation space is limited, which makes it difficult to install and considers the temperature rise. Further, accurately forming the bending angle (arrow portion in the figure) with respect to the movable iron piece M at a predetermined angle increases the number of man-hours as a practical problem, does not lead to a reduction in product cost, and cannot improve productivity efficiency. , And so on. The present invention is intended to eliminate the above-mentioned difficulties as much as possible. The yoke Y and the movable iron piece M are brought into direct contact with each other to improve the magnetic efficiency, and the structure is simplified to generate a slight noise during operation. The aim is to reduce the temperature rise and increase the productivity.

[0004]

[Means for Solving the Problems]

According to the present invention, the movable iron piece M having the cutouts c ₂ formed on both rear sides is bent in an inverted L-shape in cross section and has a cutout c ₃ formed in the middle thereof, and extends to the front side below the cutout. Conjunction unit k _3, engaging portion k ₄ for upwardly the tip is bent in front of the engaging portion k ₃ in the cutout c ₃ is an elastic piece S which is respectively formed a plurality at the back The thin wire holding plate H made of synthetic resin in which the notch c ₄ is formed, and the movable contact t ′ at the front end, and the rear end as the movable contact Sn that serves as a connection terminal are embedded and fixed. An insulating base T and an insulating base T are sequentially stacked and fixed to each other, and a fixing plate is bent and fixed to the outside of the yoke so that the upper end is in the front and the lower end is downward so as to have a U-shaped cross section through a notch c _1. K is is fixed, the the lower surface S of the engaging portion k ₁ of the engaging portion k ₄ is the yoke Y of the elastic piece KS, engaging portion k ₃ of the elastic strips S It is achieved by an electromagnetic relay, characterized in that is loaded so that through notch c ₁ of該継iron Y is pressed against the rear surface of the engaging portion k ₂ extending downward.

[0005]

【Example】

Hereinafter, with reference to FIG. 1 and FIG. 2, a detailed structure of the present invention will be described. FIG. 1 is an exploded perspective view showing the structure of the present invention. The same parts as those of the conventional type are designated by the same reference numerals, and only the structural features of the present invention will be described. Z is an insulating plate made of synthetic resin or the like having a plurality of fixed contacts t fixed in the vicinity of the upper part thereof so as to oppose the upper and lower parts, and K is parallel to the engaging part k ₁ and the lower part to the yoke Y. The fixed portion fixed to the rear surface of the yoke in which the notch c ₁ is formed at a portion of the engaging portion k ₂ that is bent and has a U-shaped cross section and which faces the engaging portion k _1. The plate has protrusions t ₁ formed on both sides above the yoke.

[0006] M, like the yoke Y, is made of a magnetic material, has a plate-like movable shape with a screw hole b'perforated substantially in the center of the left and right, and notches c ₂ formed in the vicinity of the left and right rear ends thereof. The iron pieces and S are elastic pieces made of a thin plate such as phosphor bronze and bent in an inverted L shape. Screw holes b'are punched on the entire left and right sides, a notch c ₃ is formed in the center, and the lower part is an engaging portion. k ₃ and by engaging portion k k ₃ a reverse (upward) to the fixing plate K a tip in contact with the engaging portion k ₁ L-shape and has been engaging portion k _4-out is the cut c of It is formed within ₃ . H is a thin plate-shaped electric wire holding plate made of such hard synthetic resin, the screw holes b 'at the center left and right notches c ₄ for a plurality of wire holding at its rear end, are formed respectively. T is an insulating base made of synthetic resin, in which a plurality of movable contact pieces Sn each having a movable contact t'on the upper and lower ends and a rear end serving as a connection terminal t "for holding an electric wire are embedded, f Is a pressing plate in which screw holes b'are punched on the left and right, and the screw holes b'of the movable iron piece M, the elastic piece S, and the wire holding plate H are aligned and fixed to the movable iron piece by screws.

[0007]

[Effect of the device]

 Since the present invention has a ridge structure, the operation and effects of the assembly will be described with reference to FIG. 1. First, as described above, the movable iron piece M, the elastic piece S, The electric wire holding plate H and the insulating base T are sequentially stacked, and since the screw holes are preliminarily drilled so that the screw holes b ′ are aligned with each other, screws (not shown) are inserted into the screw holes and fixed by pressure.

Next, the movable contact t ′ of the insulating base T is placed between the insulating plates Z facing each other on the magnetic pole P 1 assembled as shown in the lower part of FIG. Then, each notch c ₂ on the rear side of the movable iron piece M is brought close to each protrusion t ₁ on the upper portion of the yoke Y, and the engaging portion k ₄ of the elastic piece S is attached to the fixing plate K of the yoke. the lower surface of the notch k _1, the engaging portion k ₃ of the elastic piece is arranged to press the rear surface of the engaging portion k ₂ through c ₁ cutouts of the fixing plate, the notch of the movable iron piece M in this state It is assumed that c ₂ is placed between the protrusions t ₁ of the yoke Y, and finally the electric wire L is fixed to the connection terminal t ″ of the insulating base T, and each electric wire is attached to each notch c ₄ of the electric wire holding plate H. It is advisable to press fit into each of the wires and fix the other end of each of the electric wires to a predetermined portion. FIG. 2 shows an enlarged side view of the main part in this state.

In the electromagnetic relay thus constructed, the upper surface of the elastic piece S is fixed to the movable iron piece M, and the lower engaging portion k ₃ of the elastic piece is fixed to the yoke Y. Since the back surface of the engaging portion k ₂ is constrained, the open state of the magnetic pole P is elastically maintained as shown in FIG. 2 when the coil C is not biased. According to the present invention, as described above, the elastic piece S acting as a spring is obtained by simply punching out a thin plate, and the engaging portions k ₃ and k ₄ thereof are elastic to the fixed plate K. Since the movable iron piece M is directly fitted to the notch c ₂ and directly touches the yoke Y, it can be assembled quickly because it is only pressed against the yoke Y. Since it does not require a large gear gap g like the one described above, it not only has good permeability and reduces microvibration during operation, but also has a small number of man-hours and can improve productivity. It is possible to expect an excellent action and effect capable of sufficiently achieving the above.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing the configuration of the electromagnetic relay of the present invention.

FIG. 2 is an enlarged side view of essential parts showing an assembled state of the electromagnetic relay of the present invention.

FIG. 3 is an enlarged cross-sectional view of a main part showing an engaged state of a conventional movable iron piece and a yoke.

[Explanation of symbols]

b ′ screw hole C coil c ₁ , c ₂ , c ₃ , c ₄ notch f holding plate H electric wire holding plate K fixing plate k ₁ , k ₂ , k ₃ , k ₄ engaging part L electric wire M movable iron piece P magnetic pole S elastic piece Sn movable contact piece T insulation stand t fixed contact t'movable contact t "connection terminal t ₁ protrusion Y yoke Z insulating plate

Claims (1)

[Scope of utility model registration request] 1. An insulating base Z having a plurality of fixed contacts facing each other in the upper vicinity, and an L having a magnetic pole P and a coil C mounted thereon.
It is of a type composed of a yoke Y bent in a letter shape and a movable iron piece M which is movable above the yoke and attracted to the magnetic poles, and cutouts c ₂ are formed on both rear sides thereof. The movable iron piece M is bent into an inverted L-shaped cross section and has a notch c in the middle.
₃ is formed, and the engaging portion k ₃ extends in front of the cutout.
But notch engaging portion k ₄ for upwardly the tip is bent in front of the engaging portion k ₃ in the c ₃ is respectively formed elastic pieces S
And a thin electric wire holding plate H made of synthetic resin having a plurality of notches c ₄ formed behind it, and a movable contact Sn having a movable contact t ′ at the tip and a rear end serving as a connection terminal. And an insulating base T that is embedded and fixed in this order. The upper and lower ends of the yoke are folded so as to have a U-shaped cross section through the notch c ₁ on the outer side of the yoke. The bent fixing plate K is fixed, and the engaging portion k ₄ of the elastic piece KS is joined to the lower surface S of the engaging portion k ₁ of the yoke Y by the engaging portion k ₃ of the elastic piece S. An electromagnetic relay, wherein the electromagnetic relay is mounted so as to be pressed into contact with the back surface of an engaging portion k ₂ extending downward through the notch c ₁ of the iron Y.