JPS6231961Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an armature support structure for an electromagnetic relay, and its purpose is to provide an armature support structure that provides stable operation of an electromagnetic relay, and a method for inserting and attaching the armature. The goal is to reduce equipment installation costs and the number of man-hours required for insertion and installation. Also,
Another purpose is to reduce the cost by reducing the number of component parts. Generally, an electromagnetic relay consists of a magnetic circuit consisting of an excitation coil, an iron core, a yoke, an armature, etc., and a switching circuit consisting of a contact spring set, etc., and its operation is such that the armature is attracted to the iron core by energizing the excitation coil. The movement of the armature is transmitted to the opening/closing circuit via a contact driver (so-called card) locked to the armature, and acts to open and close the group of contact springs.

In such an electromagnetic relay, a conventional armature support structure includes, for example, providing a bent shoulder on the armature, and suspending the armature on a yoke by the shoulder.
A structure was adopted in which one end of the armature support member to which the armature was fixed was fixed to the yoke side together with the contact spring assembly block or by a mounting plate or the like.

However, in such a conventional support structure, it is necessary to fix the armature supporting member to both the armature and the yoke side, which requires a lot of man-hours to fix (install) the armature, and the excitation coil A return spring or the like was required to separate the armature from the iron core when the current was cut off.

The present invention makes useful proposals regarding the structure of an armature support member to improve these drawbacks, and the structure of a yoke and armature that make the application of the armature support member effective.

That is, in the present invention, the armature support member is composed of an elastic thin plate formed in a substantially U-shape on the sides with a pair of arms and a pair of stripes facing each other with a gap, and a yoke plate is attached to the tip of the arm. 90° against the plate surface of the arm so as to engage the side surfaces of both ends in the width direction and hold the yoke.
゜ A tongue-shaped holding and locking part is provided which is bent, and the tips of a pair of striped parts are connected to each other, and the connecting part is extended from the center of the connecting part in a direction that comes into contact with the upper surface of the armature. A protruding tongue-shaped pressing locking part is provided, and the base part (the base part formed in a U-shape on the side) that fixes the pair of arms and the pair of bullet parts apart from each other is provided with an extension of the arm part in the center. A tongue-shaped or claw-shaped pressing part that is biased in the opposite direction is provided, and after the armature is suspended on the yoke by its shoulder, the armature is press-fitted to the yoke by the armature support member. In addition, in order to suppress the movement of the armature and the movement of the armature in the front and back direction when it is separated, the pressing part provided at the center of the base is brought into pressure contact with the inner wall of the relay cover, and its elastic force causes The armature is suspended from the yoke by pressure contact, and the return force of the armature is obtained by the elastic force of a pair of elastic strips of the armature support member.

Hereinafter, the present invention will be described based on illustrated embodiments.

The drawings all show an electromagnetic relay according to an embodiment of the present invention: Fig. 1 is a side view, Fig. 2 is a front view, Fig. 3 is a perspective view of the armature support member, and Fig. 4 is the armature. FIG. 5 is a perspective view of the yoke, and FIG. 6 is a perspective view showing another embodiment of the armature support member.

In Figs. 1 to 6, 1 is an armature support member, 2 is an armature, 3 is a yoke, 4 is an exciting coil, and 5 is an armature support member.
is an iron core, 6 is a contact driver (so-called card), 7 is a board, 8 is a contact set, and 9 is a cover.

First, the main components of the embodiment of the present invention will be explained with reference to FIGS. 3, 4, and 5.

(A) Armature support member 1 As shown in Fig. 3, the armature support member 1 is an integrally bent thin plate elastic member having spring characteristics, and its shape is approximately U-shaped when viewed from the side. It is configured.

That is, a pair of arm portions 1 are provided above and below both sides of the base portion 14.
1 and a pair of bullet parts 12 are provided facing apart and extending in the same direction, and the tip 1 of the arm part 11
11 forms a free end, and from the outer side of the tip 111, a holding and locking part 15 that comes into contact with a yoke 3, which will be described later, is bent upward at approximately 90 degrees with respect to the surface of the arm part 11. established in the state. The pair of barring portions 12 are connected to each other by a connecting portion 13 at the distal end portion, and in the center of the connecting portion 13, a pressing locking portion 16 that presses into contact with the armature 2, which will be described later, is provided as an arm portion. A hole 161 is provided in the center of the press locking portion 16 to be engaged with a locking protrusion 23 of the armature 2, which will be described later.
is open. Further, the press locking portion 16 is connected to the virtual plane formed by the pair of bullet portions 12 and the pair of arm portions 1.
It is integrated with the connecting part 13 via a holding part 162 directed downward from the connecting part so as to be located between the virtual plane created by It is a long groove. The shape of this hole 161 facilitates the fitting work of the armature support member 1, which involves the work of engaging the hole 161 with the locking protrusion 23 provided on the armature 2, in the assembly process described later. It is shaped like this. That is, the locking protrusion 23 can be inserted into the hole 161 without bending the press locking portion 16.

Further, a tongue-shaped pressing portion 17 is provided at the center of the base portion 14 and is slightly bent in a direction opposite to the extension direction of the arm portion 11 to apply an elastic force.

(B) Armature 2 As shown in Fig. 4, the armature 2 is made by bending, for example, an electromagnetic soft iron plate into a substantially L shape, and one side is placed on the yoke 3 and a contact driver. The other surface forms a flat plate-shaped part to be attracted 22 which is attracted to the iron core 5.

A locking protrusion 23 is provided on the upper surface of the mounting portion 21, with which the press locking portion 16 of the armature support member 1 engages, and on both sides of the attracted portion 22, the armature An insertion space 2 formed by cutting out a concave shape into which the arm portion 11 of the support member 1 is inserted in a non-contact manner.
4 are provided.

(C) Yoke 3 As shown in Fig. 5, the yoke 3 is made by bending, for example, an electromagnetic soft iron plate into a substantially L shape, and one side has a flat armature on which the armature 2 is placed. A mounting portion 31 is formed, and the other surface forms a core fixing portion 32 to which the iron core 5 is fixed. The width of the armature mounting portion 31 is uniform in the length direction, and both end surfaces 3 of the armature mounting portion 31 are uniform in width.
11 is a flat surface.

Next, the dimensional relationship of each part of the armature support member 1, armature 2, and yoke 3 described above will be described.

(a) Tips 1 of the pair of arms 11 of the armature support member 1
The dimension a between the holding and locking parts 15 provided in the yoke 11 is set equal to the width b of the yoke 3.

(b) The vertical dimension c between the press locking portion 16 of the armature support member 1 and the pair of arm portions 11 is the same as that of the mounting portion 21 of the armature 2 in the natural state (state before assembly). It is set shorter than the total dimension of the thickness d and the thickness e of the armature mounting portion 31 of the yoke 3.

(C) The protruding length f of the pressing portion 17 of the armature support member 1 from the base 14 is the dimension g between the base 14 and the inner wall surface of the cover 9 when the electromagnetic relay is assembled in its natural state ( (see Figure 1).

(d) The dimension j between the bottom portions of the insertion space 24 provided in the attracted portion 22 of the armature 2 is the same as that of the armature support member 1.
It is set shorter than the inner dimension h of the pair of arm portions 11.

Next, with reference to FIGS. 1 and 2, the assembly of the armature support member 1, the armature 2, and the yoke 3, and the state after assembly will be explained.

The armature 2 is mounted on the yoke 3 with its mounting portion 21 in contact with the armature mounting portion 31 of the yoke 3 . At this time, the bent portion 25 on the inside of the shoulder portion of the armature 2 (the boundary line between the placed portion 21 and the attracted portion 22) is brought into contact with the upper edge 312 of the front end portion of the yoke 3.

The armature supporting member 1 is inserted into the armature 2 placed on the yoke 3 from the front side (the side of the attracted part 22) and engaged therewith. At this time, from the dimensional relationship in (a) above, the armature support member 1 and the yoke 3 engage, and
The hole 161 of the press locking part 16 of the armature support member 1 abuts and engages with the locking protrusion 23 of the armature 2, and from the dimensional relationship in (b) above, the armature 2 and the yoke 3 form a pair of arms. Part 1
1 and the press locking part 16, the arm part 11 and the bullet part 1
2 and the elastic force generated between the parts 2 and 2 creates a state in which they are pressed together. Further, in this state, the pair of arm portions 11 are inserted into the insertion space 24 of the armature 2, but the arm portions 11 do not contact the wall surface of the insertion space 24 due to the dimensional relationship (d) above.

The excitation coil 4 is fixed to the iron core 5 fixed to the iron core fixing part 32 of the yoke 3, and the yoke 3 is installed at a predetermined position on the board 7 on which the contact set 8 is provided, and then connected with the contact driver 6. After linking between the tip of the mounting portion 21 of the pole 2 and the movable contact spring of the contact set 8, a cover 9 is placed over it. Due to the dimensional relationship (c) above, the tip of the pressing part 17 of the armature support member 1 presses against the inner wall surface of the cover 9, and the hole 161 of the pressing locking part 16 presses against the locking protrusion 23 of the armature 2. Then, the armature 2 is pushed in the direction of the board 7, and the bent portion 25 on the inside of the shoulder is forcefully suspended on the upper edge 312 of the front end of the yoke 3, forming a shaft for movement of the armature 2. do. In this sense, the bent portion 25 is a rolling shaft portion of the armature 2, and the upper end 312 of the front edge portion is a fulcrum portion.

In the assembled state as described above, the deviation of the armature 2 in the left-right direction is caused by the engagement between the holding and locking part 15 of the armature support member 1 and the armature mounting part 31 of the yoke 3, and Locking protrusion 23 of pole 2 and armature support member 1
The displacement in the vertical direction is restricted by the elastic force obtained by the arm part 11 and the elastic part 12, and furthermore, the vertical displacement is Since the directional deviation is regulated by the elastic force of the pressing portion 17 of the armature support member 1, the armature 2 is correctly placed and held on the yoke 3, and its operation is also stable.

Furthermore, when the armature 2 is attracted to the iron core 5, the elastic force of the armature support member 1 must be appropriately set because the elastic force of the armature support member 1, especially the elastic portion 12, bends against the elastic force. Accordingly, the armature support member 1 can provide the necessary restoring force when restoring the electromagnetic relay.

Further, the arm portion 11 of the armature support member 1 is connected to the armature 2
The operating characteristics of the armature 2 are improved by setting the size of the insertion space 24 so as not to come into contact with the armature.

Next, another embodiment of the armature support member 1 will be described with reference to FIG.

The embodiment shown in FIG. 6 differs from the previous embodiment in two points: the shape of the pressing part 17 and the shape of the hole 161 provided in the pressing locking part 16, and the other points are the same as in the previous embodiment. .

The pressing portion 17 is formed of a pair of claw stripes that are cantilevered from the center of the base portion 14, and the protruding length of the tip thereof is set to be the same as the dimension f described in (c) above.

Further, the hole 161 of the press locking portion 16 is configured with a hole having a size in which the locking protrusion 23 of the armature 2 fits.

It should be noted that the two structures of the embodiment shown in FIG. 6 that are different from those of the previous embodiment can be adopted separately.

Furthermore, the relationship of engagement of the armature support member 1 to the electromagnetic relay shown in FIG. 6 is the same as in the previous embodiment and can be easily understood.

As explained above, according to the present invention, the armature can be mounted by a simple operation of placing the armature on the yoke and fitting the armature support member, and the armature can be mounted on the yoke at a specified position on the yoke. Since the armature is placed in a position that is elastically restricted, its operation is stable, and since the armature support member can also serve as a return spring, a separate return spring is not required. This is extremely effective in reducing relay assembly man-hours, stabilizing operation, and reducing the number of component parts.

[Brief explanation of the drawing]

The drawings all show an electromagnetic relay according to an embodiment of the present invention: Fig. 1 is a side view, Fig. 2 is a front view, Fig. 3 is a perspective view of the armature support member, and Fig. 4 is the armature. FIG. 5 is a perspective view of the yoke, and FIG. 6 is a perspective view showing another embodiment of the armature support member. Main symbols: 1; Armature support member; 11...Arm portion; 12...Stripe portion; 13...Connecting portion; 14...
Base, 15... Holding and locking part, 16... Pressing and locking part, 17... Pressing part, 2; Armature, 21... Placed part, 23... Locking protrusion, 3; Yoke, 31... Armature mounting portion, 312... Upper edge of front end, 9; Cover.

Claims (1)

[Claims for Utility Model Registration] 1. The shoulder inner bent portion 25 of the approximately L-shaped armature 2 is brought into contact with the upper edge 312 of the front end portion of the yoke 3, and the armature 2 is rotated around this contact portion as an axis. In an electromagnetic relay configured to roll, the armature 2 is attached to the yoke 3 in the arrangement described in the following (B) to (E) using the armature support member 1 described in the following (A). Electromagnetic relay. (A) A pair of arm parts 11 equipped with a holding and locking part 15 at the tip 111, and a base part 14 that stands up from the rear end of this arm part 11 and connects both arm parts 11 to the above-mentioned A pair of elastic strips 12 are formed so as to extend from the base 14, facing the pair of arm portions 11 at a predetermined distance, and connected to each other by a connecting portion 13 on the opposite side of the base 14. An armature supporting member 1 having a pressing part 17 formed in the above-mentioned manner and a locking pressing part 16 extending from the connecting part 13 toward the base 14; (C) The holding and pressing part 16 of the armature supporting member 1 is pressed against the upper surface of the armature 2 in a holding manner. (D) Due to the relationships in (B) and (C) above, the armature 2 and the yoke 3 are in contact with the arm portion 11 and the strip portion 12 of the armature support member 1. (E) The pressing part 17 of the armature support member 1 is brought into elastic contact with the inner wall surface of the cover 9 of the electromagnetic relay, and the shoulder part of the armature 2 is pressed against the shoulder part of the armature 2. Inner bent portion 25
2. The electromagnetic relay according to claim 1, wherein the armature support member 1 is integrally formed of an elastic thin plate. . 3. The electromagnetic relay according to claim 1 or 2, in which at least the strip portion 12 has an elastic force strong enough to restore the armature 2. 4 Holding and locking part 15 at the tips 11 of the pair of arm parts 11
1. The electromagnetic relay according to claim 1, which has been registered as a utility model, and is constructed by having tongue-shaped pieces erected perpendicularly to the surface of the arm portion 11 from side end portions that are outer sides of each other.