JP2000260284A - Electromagnetic relay and its assembly method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a relay as a whole by arranging coil connecting end parts of coil terminals connected to a coil on the inside surface of one flange and in a space inside in the coil axial direction of plate-like parts for contacts. SOLUTION: In this small electromagnetic relay 1, coil connecting end parts 12a, 13a of a first and second coil terminals are arranged on the inside surface of one flange 2b of a spool 2 and in a space inside in the coil axial direction of plate-like parts 9a, 11a for contacts of a first and second fixed terminals 9, 11. The coil connecting end parts 12a, 13a are arranged and received by effectively utilizing the space, so that the small electromagnetic relay 1 is miniaturized as a whole. When they are arranged in the space, a large insulation distance between the first and second coil terminals and the first and second fixed terminals 9, 11 can be secured while securing large widths of the first and second fixed terminals 9, 11. A trouble caused by the electrical connection between the fixed terminals and the coil terminals can be avoided with high reliability, and the current capacity of the fixed terminals can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay in which one flange of a spool is disposed inside a case opening, and a coil terminal is mounted on one flange of the spool adjacent to a fixed terminal. The present invention relates to an electromagnetic relay that can secure a large width dimension (current capacity) of a fixed terminal while maintaining a small size as a whole, and that can well mount and store a coil terminal (particularly, a coil connection end).

[0002]

2. Description of the Related Art In general, an electromagnetic relay has a movable contact or a fixed contact disposed on a side opposite to a terminal from which a connection end of a terminal is led out (hereinafter, sometimes referred to as a case back side). In many cases, the conductive state (contact state) of the fixed contact is switched by moving in the coil axis direction. In such an electromagnetic relay, as disclosed in JP-A-56-93234 (first conventional example) and JP-A-10-162712 (second conventional example), a spool around which an electromagnetic coil is wound is used. A coil terminal is attached to one of the flanges on the side of the terminal, and one end (an end on the back side of the case) of the fixed terminal disposed adjacent to the coil terminal is on the back surface of the other flange of the spool. A configuration in which a fixed contact is provided on the bent plate-like portion (contact-use plate-like portion) is usually used. Here, one end of the coil terminal is led out from the terminal side of the case to the outside, and is connected to a predetermined circuit conductor (such as a power supply line for supplying electricity to the coil). ), And the other end is a terminal serving as a coil connection end connected to a lead wire of the coil, and the lead wire is entangled with this coil connection end and soldered. It is common.

In recent years, small electromagnetic relays (having a small height of, for example, 20 mm or less) mounted on a circuit board or the like for a vehicle have been strongly required to be reduced in size and cost. For that purpose, it is important to further reduce the number of parts and to assemble the parts at a high density. Therefore, as disclosed in the second conventional example, a member called a base, which has been the basis of the conventional assembling, is abolished, and one flange of the spool is arranged inside the opening of the case. A type of relay that has also functioned as a base based on a flange has appeared. Usually, in this type of small electromagnetic relay, a sealed type relay (that is, a sealed type relay) is used in order to withstand washing or the like after mounting on a board and to secure predetermined waterproofness and dustproofness. Electromagnetic relays) have become mainstream. Especially the above washing,
Since the relay is soldered for mounting on the board, the relay will be rapidly cooled by the cleaning liquid from the heated state, and a pressure difference will occur between the inside and outside of the relay. Is easily sucked into the interior,
High airtightness is required.

[0004]

The above-mentioned conventional relay is
In order to reduce the size and cost, there are the following problems with respect to mounting and storing coil terminals (particularly, coil connection ends). That is, in the case of the first conventional example, first, the coil connection end of the coil terminal is provided so as to protrude from the side surface of one of the flanges of the spool, and the coil connection end in the protruding state is formed in a box-shaped base (the first base). The case is referred to as a case 11 in FIG. For this reason, the above-mentioned base is abolished, and the entire relay (except for the connection end of each terminal) is made up of the case (the cover 12 in FIG. 2 of the first prior art publication) and the one flange. In order to reduce the number of parts (and thus reduce the size and cost), the projecting portion of the coil connection end becomes an obstacle, and the entire relay cannot be sealed. . In addition, since the coil connection end protrudes in the lateral direction from the one flange, there is a problem that the lateral dimension of the relay is increased accordingly. Therefore, in the first conventional example, the coil connection end of the coil terminal becomes an obstacle, so that downsizing and cost reduction cannot be achieved.

On the other hand, in the case of the second conventional example, a subassembly (terminal plate assembly) in which fixed terminals are attached to a member (terminal plate) separate from the spool, and a movable contact spring (movable A sub-assembly (body assembly) to which a contact terminal and a coil terminal are attached is assembled and fitted together, and a case with one end opened (the cover is referred to as a cover 301 in the above publication) is put on the assembled sub-assembly. Constitute the entire relay. The coil connection end of the coil terminal is provided so as to protrude from the side surface of the body assembly, but is housed inside the relay by being covered with the concave portion of the terminal plate. In this second conventional example, a conventional base (for example, case 11 in FIG. 2 of the first prior art publication) is used.
Although the member corresponding to the above-mentioned terminal plate is abolished, another member called the above-mentioned terminal plate is separately required.
In addition, since the coil connection end protrudes in the lateral direction, size reduction and cost reduction cannot be achieved.

In order to reduce the size and cost beyond the conventional limit, the coil terminal is attached to one flange (terminal side flange) of the spool in a state where the coil terminal is simply brought close to the fixed terminal. A structure in which the coil connection end of the terminal is erected on the inner surface of the one flange is conceivable, but in this case, a reduction in the width of the fixed terminal becomes a problem. That is, a predetermined insulation distance between the fixed terminal and the coil terminal (for example, 0.4 m for a relay having a power supply voltage of 12 V).
m or more), if the coil connection end of the coil terminal is simply placed close to the fixed terminal, the width of the fixed terminal cannot be increased by that much, and the current that can flow through the fixed terminal can be increased. In other words, a problem arises in that it is not possible to secure a large amount (that is, current capacity). Further, in a structure in which the coil connection end is mounted upright on the inner surface of the flange at the end, there is also a problem that it becomes an obstacle when winding the coil.

Accordingly, the present invention is an electromagnetic relay in which one flange of a spool is disposed inside a case opening, and a coil terminal is mounted on one flange of the spool adjacent to a fixed terminal. An object of the present invention is to provide an electromagnetic relay capable of securing a large width dimension (current capacity) of a fixed terminal while maintaining a small size, and capable of favorably mounting and storing a coil terminal (particularly, a coil connection end).

[0008]

In order to achieve the above object, an electromagnetic relay according to claim 1 is covered with a case having an open end, and one flange of a spool around which a coil of an electromagnet is wound is provided with the case. Located inside the opening of the
The other flange of the spool is arranged on the back side of the case, and extends so as to extend on the back surface of the other flange.
A fixed contact is provided on a contact-shaped plate portion of a fixed terminal bent in a letter shape, and a coil terminal is attached to the one flange so as to be adjacent to the fixed terminal. The coil connecting end connected to the contact is disposed in a space on the inner surface of the one flange and inside the contact plate-shaped portion in the coil axial direction.

According to a second aspect of the present invention, in the electromagnetic relay, the coil connection end is vertically arranged on the inner surface of the one flange in an upright state, and the two vertical plate-like portions of the fixed terminal are provided. , And are arranged so as to surround the coil connection end.

According to a third aspect of the present invention, in the electromagnetic relay, grooves are formed in the one flange so as to extend inward from a side surface and open on the outer surface and the inner surface of the one flange, respectively, and are fitted in the grooves. The coil terminal is attached to the one flange, and one end of the coil terminal led inward from the inner surface opening of the groove is the coil connection end, and is led out from the outer surface opening of the groove. The other end of the coil terminal is an end for external connection, and an opening on the inner surface side of the groove is formed so as to extend into the space.

According to a fourth aspect of the present invention, in the electromagnetic relay, the groove has an L-shape as a whole as viewed from a side surface of the one flange, and a side opening on the inner surface extends in a lateral direction parallel to the flange. Extend, the side that opens to the outer surface is shaped to extend in the coil axis direction perpendicular to the flange, and one end of the fixed terminal is bent at the inner surface opening of the groove,
It is characterized in that it extends toward the back side of the contact-shaped plate portion to constitute the coil connection end.

According to a fifth aspect of the present invention, in the method for assembling an electromagnetic relay, the member constituting the coil terminal may be disposed such that one end of the member is led out of the space and is laterally parallel to the flange from a side of the one flange. Attach so that it protrudes, then wrap the coil lead wire around one end of this member, wind the coil around the spool, solder the one end, then bend the one end inward The entirety of the one end is disposed in the space, and the mounting of the coil terminal, the positioning of the coil connection end, the winding of the coil, and the connection of the coil lead wire are performed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention applied to a small electromagnetic relay (sealed relay) will be described below with reference to the drawings. First, the overall schematic configuration of the relay of the present example will be described. 1 to 5 are views showing a relay 1 of the present embodiment. FIGS. 1 and 2 are perspective views showing a step of attaching a coil terminal, FIG. 3 is a perspective view showing a step of attaching a fixed terminal, and FIG. FIG. 5 is an overall perspective view, and FIG. 5 is a cross-sectional view of the relay. In the following, the opening side of the case (the lower side in FIGS. 1 to 4) is sometimes referred to as the case opening side or the terminal side, and the inner side of the case (the upper side in FIGS. 1 to 4) is sometimes referred to as the case inner side. The axial direction of the spool 2, which will be described later, that is, the coil axial direction (vertical direction in FIGS. 1 to 4) is sometimes referred to as a vertical direction, and the direction orthogonal to the coil axial direction is sometimes referred to as a lateral direction.

As shown in FIG. 4, this relay 1 has a spool 2 having flanges 2a, 2b at both upper and lower ends and on which a coil 2c constituting an electromagnet is wound, and a longitudinal direction formed in the spool 2. Core 3 of electromagnet inserted in through hole
(Shown in FIGS. 3 and 5), an L-shaped yoke 4 connected to the end of the iron core 3 on the case opening side and serving as a path for the lines of magnetic force.
A movable iron piece 5 whose base end is joined to the yoke 4 and which is attracted to the iron core 3 when the coil is energized and whose distal end swings;
An L-shaped movable contact spring in which a lateral plate-shaped portion 6a on the back side of the case is a swingable leaf spring, and the lateral plate-shaped portion 6a is attached to an outer surface side (an upper surface side in the figure) of the movable iron piece 5. 6
And the movable contact 7 attached to the tip of the movable contact spring 6 and the N which the movable contact 7 presses when the coil is not energized.
A first fixed contact 8 which is a C contact, a first fixed terminal 9 which is attached to a lateral plate-like portion 9a (contact plate-like portion) on the back side of the case, A second fixed contact 10 which is a NO contact to which the movable contact 7 is pressed;
This second fixed contact 10 is a horizontal plate-like portion 11 on the back side of the case.
a (second plate-like portion for contact)
And a first coil terminal 12 having coil connection ends 12a and 13a connected to the respective lead wires of the coil 2c.
And a case (not shown) in which the second coil terminal 13 (shown in FIG. 1) and the assembly side (the lower side in FIG. 4) are open and covered so as to cover the entire relay (excluding the connection end of the terminal). )
And Note that the relay 1 of this example is of a type in which one flange 2b of the spool 2 is disposed inside the opening of the case, and also functions as a base.

Here, the first fixed terminal 9 and the second fixed terminal 1
As shown in FIG. 3, the fixed contacts 8 and 10 are fixed to lateral plate-like portions 9a and 11a (contact plate-like portions) bent in an L-shape at the distal end on the back side of the case, as shown in FIG. Vertical plate-like portions 9b, 11b extending from the horizontal plate-like portions 9a, 11a to the terminal side;
It has vertical plate-like portions 9c and 11c extending at right angles so as to surround the coil 2c from the side edges of the terminals b and 11b on the terminal side. Further, connecting ends 9d and 11d as fixed terminals extend from the terminal sides of the vertical plate portions 9c and 11c, and extend toward the case opening side from the flange 2b of the spool 2 at the time of assembly. When mounted on a substrate, it can be connected to a predetermined circuit conductor. In order to increase the current capacity of the fixed terminals 9 and 11, it is necessary to increase the length of the vertical plate-like portion 9 which is a passage for the current from the circuit conductor of the substrate to the fixed contacts 8 and 10.
b, 11b and width dimensions W1, W2 of 9c, 11c (FIG. 5)
It is necessary to secure a large value.

As shown in FIG. 1 (a), the first coil terminal 12 and the second coil terminal 13 are generally L-shaped before assembly, and
b, 13b from the outer end surfaces of the coil connection ends 12a,
13a extends in the horizontal direction, and the base plate portion 12b,
External connection ends 12c and 13c extend in the vertical direction from the inner end surface of 13b. These first coil terminals 1
2 and the coil connection ends 12a, 1 of the second coil terminals 13
3a is bent in a vertical direction in an attaching step as will be described later, and finally on the inner surface of the one flange 2b, as shown in FIG.
a, 11a are arranged vertically in a space inside (in the lower side in FIG. 4) in the coil axial direction. Note that fixed terminals 9, 1 are located at positions below the contact plate portions 9a, 11a in the figure.
1, the vertical plate-like portions 9b, 1 of the fixed terminals 9, 11
Although it is difficult to avoid the generation of a relatively large space surrounded by 1b than in the past, in the present relay, by arranging the coil connection ends 12a and 13a in this space, this space is effectively used. I have. The external connection ends 12c and 13c of the first coil terminal 12 and the second coil terminal 13 also extend toward the case opening side from the flange 2b in the assembled state, and can be connected to a predetermined circuit conductor when the board is mounted. It has become.

The first coil terminal 12 in the present embodiment
The mounting structure of the second coil terminal 13 is symmetric and the same, and is as follows. That is, on both sides of the one flange 2b, as shown in FIG. 1 (a), grooves 21 and 22 are formed which extend inward from the side surfaces and are respectively opened on the outer surface and the inner surface of the flange 2b. Groove 2
Each of the coil terminals 12 and 13 is attached to the flange 2b by being fitted into the corresponding one of the coil connection ends 12a and 12a.
13a is led inward, and the external connection ends 12c, 13c are led out from the outer openings of these grooves 21, 22 so that the inner openings of these grooves 21, 22 extend into the space. Is formed. In addition, the groove 2
When viewed from the side surface of the flange 2b, the flanges 1 and 22 have an L-shape as a whole, and the side opening to the inner surface is the flange 2b.
The flange 2 extends in the lateral direction parallel to
b, and extends in the coil axis direction (vertical direction) perpendicular to the coil connection end 12 of each of the fixed terminals 12 and 13.
a, 13a are bent at right angles at the inner side openings of the grooves 21, 22 (see FIGS. 3 and 4), and in this case, extend toward the back side of the contact plate portions 9a, 11a along the coil axis direction. ing.

Further, the first fixed terminal 9 and the second
The mounting structure of the fixed terminal 11 is basically the same structure that is symmetrical, and is as follows. That is, for example, the second fixed terminal 11 will be described. As shown in FIG. 3, the second fixed terminal 11 has a protruding portion 11e protruding from the plate portion 11c to the terminal side, and a protruding portion from the plate portion 11b to the terminal side. And a protruding portion 11f protruding therefrom. Meanwhile, spool 2
These projecting portions 11
e, 11f are provided with through holes 2d, 2e into which press-fitting is possible. Further, the other flange of the spool 2 (the flange 2a on the inner side of the case) is provided with the plate-shaped portion 11
An L-shaped (hook-shaped) engaging portion 2f is provided to engage with the side edge of b, and the second fixed terminal 11 is supported and fixed by the engaging portion and the press-fitting portion.

In this case, each of the coil terminals 12, 13
The coil 2c and the fixed terminals 9, 11 are simply attached as follows. That is, as shown in FIG. 1A, for example, the coil terminals 12 and 13 (L-shaped ones before assembly) are linearly and horizontally moved in parallel from the side of the flange b, and FIG. As shown in b), each is fitted into the grooves 21 and 22 as far as it will go. Next, in this state, a lead wire is connected to the coil connection end 12a or 13a, and the coil 2
A winding step of winding c is performed. At this time, since each coil connection end 12a, 13a extends laterally from the inner opening of the groove 21, 22 and projects from one side surface of the flange 2b, this winding step is performed, for example, by the following process. It can be easily performed as follows. That is, after the lead wire at one end of the coil 2c is entangled with the coil connection end of the coil 12c, the spool 2
After that, the lead wire at the other end of the coil 2c is tied to the coil connection end of the coil 13a, and finally, the two coil connection ends 12a,
13a is simultaneously immersed in a solder bath and soldered.

Next, as shown in FIG. 2 (c), a force is applied to each of the coil connection ends 12a and 13a projecting from one side surface of the flange 2b to apply a force to each of the coil connection ends 12a and 13a. Ends 12a and 13a are grooved 2
The inner ends of the coil connection ends 12a and 13a are bent at substantially right angles at the inner openings of the first and second openings, so that the entire coil connection ends 12a and 13a are accommodated in the aforementioned space. Then, as shown in FIG. 3, for example, the first fixed terminal 9 and the second fixed terminal 11 are moved straight in the vertical direction while being kept parallel to the coil axis direction,
While the side edges of the respective plate-like portions 9b and 11b are engaged with the engaging portions (for example, the engaging portions 2f) of the flange 2a, the aforementioned protruding portions (for example, the protruding portions 11e and 11f) are
b through holes (for example, through holes 2d, 2e)
The first fixed terminal 9 and the second fixed terminal 11 may be attached.

As described above, in the relay 1 of this embodiment,
Coil connection ends 12a, 13a of coil terminals 12, 13
Is disposed on the inner surface of one flange 2b of the spool 2 and in the space inside the contact plate portions 9a, 11a of the fixed terminals 9, 11 in the coil axial direction. For this reason, the coil connection ends 12a and 13a are arranged and stored by effectively utilizing the space previously vacated without providing a separate member, and the entire relay can be reduced in size.
In addition, if the fixed terminals 9 and 11 are arranged in this space,
Since the insulation distance between the coil terminals 12 and 13 and the fixed terminals 9 and 11 can be ensured while keeping the width dimension of the coil terminals large, it is possible to reliably avoid problems caused by conduction between the fixed terminals and the coil terminals. In addition, the current capacity of the fixed terminal can be increased (that is, the amount of heat generation can be reduced).

Particularly, in this embodiment, the coil connection ends 12a, 1
3a is vertically arranged on the inner surface of the flange 2b in an upright state, and two vertical plate-like portions 9b, 9c or 11b, 11c perpendicular to each other of the fixed terminals 9, 11 are connected to the coil connection end portions 12a. , 13a so as to surround each of the fixed terminals 9, 11 while securing a large insulation distance (for example, the width W shown in FIG. 5).
1, W2) can be secured larger.

Also, grooves 21 and 22 are formed on one flange 2b of the present embodiment and extend inward from the side surfaces and are respectively opened on the outer surface and the inner surface of the flange 2b. 12 and 13 are attached to the flange 2b, and one end of each of the coil terminals 12 and 13 led inward from the inner surface openings of these grooves are coil connection ends 12a and 13a. The other end led out is the external connection end 12.
c, 13c, and the inner side opening of the groove is formed to extend into the space. Therefore, the positioning of the coil terminals 12, 13 (at least the coil connection ends 12a, 13a and the external connection ends 12c, 13c) can be performed by a simple operation of fitting the members constituting the coil terminals 12, 13 all the way into the groove. (Positioning of a portion derived from the flange 2b) can be realized, which can contribute to facilitation of assembly.
That is, for example, in a structure in which a through hole is provided at a position in the space of the flange 2b, and members constituting the coil terminals 12, 13 are inserted or press-fitted therein,
Although there is a possibility that the other flange 2a may hinder the mounting operation, there is no such assembly obstacle in the configuration of this example.

In this embodiment, the grooves 21 and 22 are formed so as to be L-shaped as a whole when viewed from the side surface of one of the flanges 2b, and the side opening on the inner surface extends in the lateral direction parallel to the flange. , The side opening to the outer surface extends in the direction of the coil axis perpendicular to the flange.
One end of each of the grooves 2 and 13 is bent at the inner side opening of each of the grooves 21 and 22 and extends toward the back side of the contact plate portions 9a and 11a to form coil connection ends 12a and 13a.
Is configured. Therefore, as in the above-described assembling method, the fixed terminals 12, 13 (the L-shaped ones before bending) are first fitted into the grooves 21, 22 and then one end side is bent to make the coil connection ends 12a, By configuring 13a, these coil connection ends 12a and 13a can be attached in a state where they are fixed to the flange 2b. That is, in this example, one end of the fixed terminals 12 and 13 is
By being bent at the inner side opening of 1, 22,
Sufficient frictional force is generated between the fixed terminals 12 and 13 and the flange 2b, so that a special structure or operation for fixing such as press-fitting or caulking is unnecessary, and the cost can be further reduced. it can. In general, “crimping” refers to partially plastically deforming a member (mainly a metal member), for example, for the purpose of fixing two or more members to each other. In a relay, after a protrusion (convex portion) provided on one member is fitted into a hole (including an opening such as a notch) provided on the other member and penetrated, the tip of the protrusion is hit with a press machine or the like. This is a mounting method in which the members are fixed to each other by crushing and expanding the diameter.

In the present embodiment, as described above, the members (L-shaped members before bending) constituting the fixed terminals 12 and 13 are connected to one end side thereof (that is, the coil connection ends 12a and 1a).
3a) is drawn out from the space (in this case, the opening on the inner surface side of the grooves 21 and 22) and attached so as to protrude from the side surface of one of the flanges 2b in a lateral direction parallel to the flanges (see FIG. 1B). Next, a coil lead wire is wrapped around one end of this member, and a coil is wound around the spool 2, the one end is soldered, and then the one end is bent inward, so that the whole of the one end is bent. Are arranged in the space to form the coil connection ends 12a and 13a at predetermined positions. For this reason, the coil connection ends 12a and 13a do not hinder the winding of the coil. Further, when the coil connection ends 12a and 13a are in a protruding state, it is easy to immerse only the front end portion in a solder bath and perform soldering.
The work of soldering the tip portions (a lead wire entangled portion) of a and 13a is also facilitated. Therefore, although the coil connection end of the coil terminal is arranged in the space (the position inside the flange of the spool) located below the contact point, it seems to be difficult to assemble, but it is the same as the conventional one or Higher assemblability (easiness of assembling) can be secured.

FIGS. 6 and 7 are views showing a comparative example for comparatively explaining the main effects of the present invention (or the above embodiment). The same components as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted. Among them, FIG.
This embodiment employs a mounting method similar to the above embodiment.
That is, the coil terminals 32, 3 are inserted into the grooves formed in the flange 2b.
3 (before bending), and the coil connection ends 32a, 33a of the coil terminals 32, 33 on both sides of the flange 2b.
After the coil winding operation and the above-described soldering operation are performed in a state in which the coil connection ends 32a,
33a is bent inward at a substantially right angle. Also in this configuration, the entire relay can be sealed simply by covering the case without providing a separate member, and the entire relay can be reduced in size. However, in this case, the coil connection ends 32a, 33
a are arranged at both end edges of the flange 2b.
In order to interfere with the vertical plate-like portions (for example, the above-described vertical plate-like portions 9b and 11b) of the fixed terminal disposed here, a cutout is provided in the vertical plate-like portion, and the interference is prevented. It is necessary to avoid this, and as a result, the width dimension of the fixed terminal must be reduced. On the other hand, according to the present invention (or the above-described embodiment), the coil connection end is arranged in the space inside the inner surface of the flange 2b (that is, the above-mentioned space located below the contact point), which has been a conventional empty space. In addition, the above-described interference does not occur, and there is no need to provide a cutout or the like in the fixed terminal.

FIG. 7 shows, as in the second conventional example,
This is a type in which the coil connection end protruding from the side surface is covered with another member. That is, the coil connection ends 42a, 43a of the coil terminals 42, 43 are provided so as to protrude from the side surface of the flange 2b of the spool 2, and this portion is covered with a separately provided cover member 44. In this case, by covering a large case covering the whole including the cover member 44,
Although the entire relay can be sealed, the entire relay is significantly increased in size by the separately provided cover member 44. On the other hand, according to the present invention (or the above-described embodiment), the coil connection end is disposed in the above-mentioned space which has conventionally been a vacant space, and such a separate member is not required at all, so that the size can be significantly reduced. .

The present invention is not limited to the above embodiment. For example, the coil connection end of the coil terminal does not necessarily need to be upright in the direction perpendicular to the flange of the spool (that is, in the coil axis direction). As long as a predetermined insulation distance can be ensured between the fixed terminal and the terminal, and the member does not interfere with other members (for example, a case), the terminal is provided so as to extend obliquely at a predetermined angle, for example. Is also good. Further, the direction in which the coil connection end protrudes when the coil terminal is attached (when the coil is wound or the like is performed) is not limited to the above-described embodiment, and may be, for example, a comparative example shown in FIG. There may be a configuration that projects in the direction. That is, FIG.
Even with such a configuration, if the final position of the coil connection end after bending is arranged in the above-mentioned space below the contact point, basically the same effects as in the above embodiment can be obtained. However,
In the above-described embodiment, the two coil connection ends protrude side by side on the same side surface of the spool, so that the above-mentioned soldering operation can be performed simultaneously, which is advantageous.

Further, the coil terminals and the fixed terminals do not necessarily need to be mounted by linear parallel movement as described above, and are not limited to automatic assembly by an automatic machine, but may be mounted manually. However, if it can be mounted by linear translation as in the above embodiment,
Automatic assembly is easy and productivity is improved. The above embodiment is an example in which the present invention is applied to a so-called c-contact type (type having both a-contact and b-contact) electromagnetic relay.
It goes without saying that the present invention can be similarly applied to an a-contact type having only an a-contact and a b-contact type having only a b-contact.

[0030]

According to the electromagnetic relay of the present invention, the coil connection end of the coil terminal is provided on the inner surface of one of the flanges of the spool and in the space in the coil axial direction of the contact plate portion of the fixed terminal. , A space below the contact, which was previously an empty space). For this reason, without providing a separate member, the space previously vacant is effectively used, and the coil connection end is arranged and stored, and the entire relay can be reduced in size. In addition, by arranging in this space, it is possible to secure a large insulation distance between the coil terminal and the fixed terminal while securing a large width dimension of the fixed terminal. It is possible to increase the current capacity of the fixed terminal (i.e., to reduce the amount of generated heat) while avoiding the problem.

In particular, in the relay according to the second aspect, the coil connection end portion is vertically arranged on the inner surface of the one flange in an upright state, and the two vertical plate portions of the fixed terminal are connected to the coil connection portion. Since it is arranged so as to surround the end portion, it is possible to ensure a larger width dimension of the conductive portion of the fixed terminal while securing a large insulation distance.

Further, in the relay according to the third aspect, grooves are formed in the one flange so as to extend inward from the side surfaces and are respectively opened on the outer surface and the inner surface of the flange. A terminal is attached to the flange, one end of the coil terminal led inward from the inner surface opening of the groove is a coil connection end, and the other end led outward from the outer surface opening of the groove is used for external connection. The groove is formed as an end so that an opening on the inner surface side of the groove extends into the space. For this reason, the positioning of the coil terminal (at least the positioning of the coil connection end and the portion derived from the flange of the external connection end from the flange) can be realized by a simple operation of fitting the member constituting the coil terminal into the groove. , Which contributes to ease of assembly. That is, for example, in a structure in which a through hole is provided at a position in the space of the flange and a member constituting the coil terminal is inserted or press-fitted and mounted therein, the other flange becomes an obstacle and the mounting operation becomes difficult. Although there is a danger, with the configuration of this example, there is no such an assembly obstacle.

Further, in the relay according to the fourth aspect, the groove is formed so as to have an L-shape as a whole as viewed from a side surface of one of the flanges, and a side opening on the inner surface is formed in a lateral direction parallel to the flange. Extends, the side that opens to the outer surface is shaped to extend in the coil axis direction perpendicular to the flange, and one end of the fixed terminal is bent at the inner surface opening of this groove,
A coil connection end is formed to extend toward the back side of the contact plate. For this reason, as in the assembling method according to the fifth aspect, the fixed terminal (before bending) is first fitted into the groove, and then one end side is bent to form a coil connection end, thereby forming the coil connection. The end portion can be attached while being fixed to the one flange. That is, in the present relay, one end side of the fixed terminal is bent at the opening on the inner surface side of the groove, so that a sufficient frictional force is generated between the fixed terminal and the flange, and for fixing such as press-fitting and caulking. No special configuration or operation is required, and the cost can be further reduced.

Further, in the assembling method according to the fifth aspect, the member (before bending) constituting the coil terminal is connected to the lateral direction parallel to the flange from one side surface of one of the flanges, one end of which is led out of the space. Then, attach a coil lead wire to one end of this member, wind a coil around a spool, solder the one end, and then bend the one end inward. ,
The entirety of the one end is disposed in the space, and the mounting of the coil terminal, the positioning of the coil connection end, the winding of the coil, and the connection of the coil lead wire are performed. Therefore, the coil connection end (that is, the one end) does not hinder the winding of the coil. Further, when the coil connection end protrudes in the lateral direction, it is easy to immerse only this tip in a solder bath and solder it. Therefore, the tip of the coil connection end (lead wire entangled portion). Soldering work,
It will be easier. Therefore, although the coil connection end of the coil terminal is disposed in the above-mentioned space located inside the space between the flanges of the spool, it is a structure that seems to be difficult to assemble, but it is the same as or higher than the conventional one. Performance (ease of assembly) can be ensured.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a process of mounting a coil terminal of an electromagnetic relay.

FIG. 2 is a perspective view illustrating a process of attaching a coil terminal of the electromagnetic relay.

FIG. 3 is a perspective view illustrating a process of attaching a fixed terminal of the electromagnetic relay.

FIG. 4 is a perspective view showing the entire electromagnetic relay.

FIG. 5 is a cross-sectional view of the electromagnetic relay.

FIG. 6 is a diagram illustrating a comparative example of a coil terminal structure of an electromagnetic relay.

FIG. 7 is a diagram showing a comparative example of a coil terminal structure of an electromagnetic relay.

[Explanation of symbols]

 Reference Signs List 1 small electromagnetic relay 2 spool 2b one flange 2a other flange 2c coil 3 iron core 4 yoke 8 first fixed contact 9 first fixed terminal 9a contact plate 9b, 9c vertical plate 9d of first fixed terminal Connection end 10 Second fixed contact 11 Second fixed terminal 11a Contact plate 11b, 11c Vertical plate 11d Connection end of second fixed terminal 12 First coil terminal 12a Coil connection end 12c External Connection end 13 Second coil terminal 13a Coil connection end 13c External connection end 21, 22 Groove

Claims (5)

[Claims] An end of a spool, which is covered with a case having an open end, and on which a coil of an electromagnet is wound, is disposed inside an opening of the case, and the other flange of the spool is located on a back side of the case. A fixed contact is provided on a contact-shaped plate portion of the fixed terminal bent into an L shape so as to extend on the inner surface of the other flange, and the coil terminal is adjacent to the fixed terminal. In the electromagnetic relay attached to one of the flanges, the coil connection end of the coil terminal connected to the coil may be provided on the inner surface of the one flange and in the coil axial direction inside of the contact plate. An electromagnetic relay characterized by being arranged in a space. 2. The coil connection end is vertically disposed in an upright state on an inner surface of the one flange, and two vertical plate-like portions of a fixed terminal surround the coil connection end. The electromagnetic relay according to claim 1, wherein the electromagnetic relay is arranged as follows. 3. The one flange is formed with a groove extending inward from a side surface and opening to an outer surface and an inner surface of the one flange, respectively. Mounted on the flange,
One end of the coil terminal led inward from the inner opening of the groove is the coil connection end, and the other end of the coil terminal led outward from the outer opening of the groove is an external connection end. The electromagnetic relay according to claim 1, wherein an opening on the inner surface side of the groove is formed to extend into the space. 4. The groove has an L-shape as a whole as viewed from a side surface of the one flange, a side opening to the inner surface extends in a lateral direction parallel to the flange, and a side opening to the outer surface corresponds to the flange. One end of the fixed terminal bends at an opening on the inner surface side of the groove, and extends toward the back side of the contact-shaped plate-like portion, and extends along the coil connection end. 4. The electromagnetic relay according to claim 3, wherein the electromagnetic relay comprises a part. 5. A member constituting the coil terminal is mounted such that one end thereof is led out of the space and projects from a side surface of the one flange in a lateral direction parallel to the flange. After winding the coil around the spool and soldering the one end, the one end is bent inward, and the entire one end is placed in the space. hand,
Mounting of the coil terminal, arrangement of the coil connection end,
The method for assembling an electromagnetic relay according to any one of claims 1 to 4, wherein winding of a coil and connection of a coil lead wire are performed.