JP3943632B2 - Electromagnetic relay - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electromagnetic relay incorporated in an in-vehicle facility, an acoustic facility, a personal computer or the like mounted on an automobile or the like, and more particularly to a low operating sound type electromagnetic relay that prevents annoying sounds generated during operation from leaking to the outside. .
[0002]
In recent years, the range of use of electromagnetic relays has been expanded and installed in in-vehicle equipment, acoustic equipment, personal computers, etc., but when they are used in such a quiet environment, they occur when electromagnetic relays are restored. The operation sound is extremely harsh.
[0003]
This operating sound is the sound generated when the armature collides with the iron core during operation of the electromagnetic relay, or the sound generated when the movable contact collides with the fixed contact, and these impact sounds are generated by the air and the structure inside the electromagnetic relay. Propagated to the outside through members and lead terminals for supporting parts.
[0004]
Therefore, there is a demand for the development of a low operating sound type electromagnetic relay that does not leak the sound generated when the operation is restored.
[0005]
[Prior art]
FIG. 4 is a perspective view showing a main part of a conventional electromagnetic relay.
A low operating sound type electromagnetic relay in which sound generated at the time of operation restoration is not leaked to the outside has already been proposed by the group of inventors and the like, and as shown in FIG. 4, the electromagnetic relay main body 2 and the support portion 3 for supporting the electromagnetic relay main body 2 And an external substrate 1 made of a resin.
[0006]
The electromagnetic relay main body 2 has an internal substrate 21 made of resin and two movable contact springs 22 each having one end fixed to the internal substrate 21, and sandwiching the free end side of the movable contact spring 22 parallel to the internal substrate 21. The arranged fixed contact springs 23 and 24 are fixed to the internal substrate 21.
[0007]
In addition, it has an electromagnet 27 mounted on the inner substrate 21 so as to sandwich the movable contact spring 22 and an armature 26 fixed to the movable contact spring 22, and by energizing the coil 28 of the electromagnet 27, The opposing armature 26 is attracted and the movable contact spring 22 is driven.
[0008]
On the other hand, the support portion 3 includes a U-shaped spring 31 and a lead terminal 32, a plurality of external terminals 33 mounted on the external substrate 1, and a lower end of the U-shaped spring 31 that is bent in an L shape. And a plurality of relay terminals 34 fixed to the side where the lead terminal 32 is not provided.
[0009]
The internal substrate 21 of the electromagnetic relay main body 2 is supported substantially perpendicularly to the external substrate 1 by the external terminal 33 and the relay terminal 34 of the support portion 3, and includes a movable contact spring 22, fixed contact springs 23 and 24, and a coil 28 and an external terminal. 33 is electrically connected via the relay terminal 34.
[0010]
As described above, by interposing the L-shaped relay terminal and supporting the internal substrate of the electromagnetic relay main body substantially perpendicularly to the external substrate, the armature and the movable contact spring move in parallel with the external substrate during operation. A horizontal force is applied to the relay terminal that supports
[0011]
In addition, by connecting a plurality of lead terminals mounted on the external substrate and the L-shaped relay terminal via a U-shaped spring, the relay terminal is connected to the U-shaped spring when a horizontal force is applied. Rotating around the center of the arc portion, the direction of the force is changed to the vertical direction.
[0012]
In other words, the electromagnetic relay of the present invention has a support portion made of a spring having a long distance between the fulcrum and the action point, and improves the absorption of operation sound. In addition, the relay terminal made of a metal plate can be very easily formed into a lead frame, and the assembly of the electromagnetic relay can be automated.
[0013]
[Problems to be solved by the invention]
However, in the conventional electromagnetic relay, the electromagnetic relay body and the external terminal are connected via an L-shaped relay terminal as shown in the figure, and the lead terminal led out from the electromagnetic relay body is not shown in the figure. The space for connecting to the relay terminal is required and the size is increased.
[0014]
Also, since the relay terminals are concentrated on one side of the electromagnetic relay, it is difficult to secure a cross-sectional area of the conductor that satisfies the current carrying capacity, and because the relay terminals are interposed, the number of parts increases and the number of connection points increases. There was a problem that the time required increased.
[0015]
SUMMARY OF THE INVENTION An object of the present invention is to provide an electromagnetic relay that enhances the absorption of operation noise and is easy to be automated and reduced in size.
[0016]
[Means for Solving the Problems]
FIG. 1 is a perspective view showing a main part of an electromagnetic relay according to the present invention. Throughout the drawings, the same object is represented by the same symbol.
[0017]
The above-described problem has at least one drive unit 4, a fixed contact unit 5 to which the drive unit 4 is mounted, and a base 6 to which the fixed contact unit 5 is mounted. The drive unit 4 includes a coil terminal 41. A coil 43 wound around the bobbin 42 and having an end connected to the coil terminal 41, a yoke 45 attached to the top of the bobbin 42 and fixed to the tip of the iron core 44 passing through the bobbin 42, and one end A movable contact spring 48 having a movable contact 47 and the other end fixed to the yoke 45, and an armature 49 fixed to the movable contact spring 48 opposite to the open end surface of the iron core 44 and the yoke 45. The fixed contact unit 5 holds two fixed contact springs 51 and 52 to which at least a pair of fixed contacts 54 that oppose each other with the movable contact 47 interposed therebetween, and both ends of the fixed contact springs 51 and 52. An internal substrate 53 provided with holding grooves 55, 56, 57, 58,
Lead terminals 74, 77, 78, and 82 that are electrically connected to the movable contact spring 48, the coil terminal 41, and the fixed contact springs 51 and 52, respectively, are long plate-shaped plates having a thickness smaller than the plate width. A U-shaped spring 71 made of a member and bent in a U-shape so that the plate width surface is opposed to the intermediate portion, a lead portion 72 penetrating the base 6 in one portion of the U-shaped spring 71 is formed in the other portion. Connecting connecting pieces 73, 75, 76, 81 are integrally formed,
The lead terminals 77, 78, 82 connected to the fixed contact springs 51, 52 and the coil terminal 41 are arranged so that the arc portion of the U-shaped spring 71 faces the inside of the base 6, Connection pieces 75, 76, 81 are electrically connected to the fixed contact springs 51, 52 and the coil terminal 41 below the coil 43 of the drive unit 4, respectively, and the lead portion 72 connects the base 6 to the base 6. Penetrated and its end protruded from the back of the base as an external terminal,
The lead terminal 74 connected to the movable contact spring 48 is arranged so that the arcuate portion of the U-shaped spring 71 is directed toward the inside of the base 6 and the connecting connecting piece 73 is along the side surface of the drive portion 4. It is disposed and electrically connected to the movable contact spring 48 above the coil 43 of the drive unit 4 , the lead portion 72 penetrates the base 6, and its end portion projects from the back surface of the base as an external terminal. And
Only the lead terminals 74, 77, 78, 82 connected to the fixed contact springs 51, 52, the coil terminal 41, and the movable contact spring 48, respectively, support the fixed contact unit 5 and the drive unit 4. Achieved by the inventive electromagnetic relay.
[0018]
By adopting the L-shaped movable contact spring and mounting the fixed contact unit to which the drive unit is mounted in parallel with the base, the moving direction of the armature and the movable contact is the same as that of the conventional electromagnetic relay. It becomes parallel and it becomes possible to improve the absorption of operation sound.
[0019]
In addition, the use of a lead terminal having a lead portion that penetrates the base on one side with a U-shaped spring sandwiched on the other side reduces the number of parts and facilitates automatic assembly of the electromagnetic relay. It becomes possible to shorten the time required for connection.
[0020]
In addition, by installing the fixed contact unit parallel to the base, the lead terminals are arranged around the fixed contact unit, making it easy to secure the cross-sectional area of the lead terminals that satisfy the current carrying capacity and at the same time further reducing the size of the electromagnetic relay. It becomes possible to do.
[0021]
That is, it is possible to realize an electromagnetic relay that can improve the absorption of operation noise and can be easily miniaturized with automatic assembly.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. 2 is a perspective view showing details of the drive unit, and FIG. 3 is a perspective view showing details of the fixed contact unit.
[0023]
As shown in FIG. 1, the electromagnetic relay according to the present invention includes two driving units 4 and a fixed contact unit 5 to which the driving unit 4 is mounted. The fixed contact unit 5 is a space unlike an internal substrate of a conventional electromagnetic relay. Are mounted on the base 6 so as to face each other.
[0024]
As shown in FIG. 2, the drive unit 4 is wound around a bobbin 42 having a coil terminal 41 and both ends thereof are connected to the coil terminal 41, an iron core 44 passing through the bobbin 42, and an upper part of the bobbin 42. The L-shaped yoke 45 is fixed to the tip of the iron core 44 at one end.
[0025]
The iron core 44 whose tip is fitted into the yoke 45 has a crown 46 at the other end, and the crown 46 is usually circular in order to eliminate alignment during assembly. However, in the electromagnetic relay of the present invention, a square top is formed by header processing as means for improving magnetic characteristics.
[0026]
The drive unit 4 also has an L-shaped movable contact spring 48 having a movable contact 47 fixed to one end and the other end fixed to the back surface of the yoke 45, and the top 46 of the iron core 44 and the yoke 45. An armature 49 opposed to the open end is fixed to the side of the movable contact spring 48 having the movable contact 47.
[0027]
A lead terminal 74 having a lead portion 72 on one side with a U-shaped spring 71 and a connecting connection piece 73 on the other side is connected to the movable contact spring 48, and connecting connection pieces 75, 76 are connected to the other side of the U-shaped spring 71. The provided lead terminals 77 and 78 are connected to the coil terminal 41 on the bobbin 42, respectively.
[0028]
The connecting connection piece 73 of the lead terminal 74 and the movable contact spring 48 are inserted into the protrusions 80 of the yoke 45 and simultaneously crimped, and are overlapped as a means for improving the electrical connection. And the movable contact spring 48 are connected by spot welding.
[0029]
The connecting pieces 75, 76 for connecting the lead terminals 77, 78 and the coil terminal 41 are connected by press-fitting together into the slit 79 of the bobbin 42, and provided, for example, on the bobbin 42 as means for improving electrical connection. Both are welded by irradiating a laser beam from the hole.
[0030]
When one lead terminal 77 is connected to each of the coil terminals 41 of the two drive units 4, four lead terminals 77 are required. However, in the electromagnetic relay of the present invention, two adjacent coil terminals 41 are the same. The lead terminal 78 is connected to a connecting connecting piece 76.
[0031]
By connecting the adjacent coil terminals 41 of the two drive units 4 to the connecting connecting piece 76 of the same lead terminal 78 in this way, the number of lead terminals is reduced and the space occupied by the lead terminals is omitted, thereby reducing the size. This contributes to the reduction of parts costs and assembly relaxation.
[0032]
The fixed contact unit 5 includes two fixed contact springs 51 and 52 bent in a U-shape as shown in FIG. 3 and an internal substrate 53, and at least a pair of fixed contacts 54 opposed to each other with the movable contact 47 interposed therebetween. Are fixed to one side of the fixed contact springs 51 and 52, respectively.
[0033]
On the other hand, although not shown, the internal substrate 53 on which the drive unit 4 is mounted has a holding mechanism that engages with the bobbin 42 of the drive unit 4, and further engages and fixes both ends of the fixed contact springs 51 and 52. Holding grooves 55, 56, 57, 58 for holding the contact springs 51, 52 at predetermined positions are provided.
[0034]
That is, the two fixed contact springs 51 and 52 bent in a U-shape are positioned by being inserted into the holding grooves 55, 56, 57 and 58 at both ends, and the fixed contact 54 of the fixed contact springs 51 and 52 is fixed. One side opposite to the one side is fixed to the internal substrate 53 by, for example, heat caulking.
[0035]
A lead terminal 82 having a lead 72 on one side and a connecting connecting piece 81 on the other side of the U-shaped spring 71 and the fixed contact springs 51 and 52 are sandwiched between opposite sides of the fixed contact springs 51 and 52. Connection is made by caulking the connecting connecting pieces 81 to the intermediate sides.
[0036]
The electromagnetic relay according to the present invention differs from the conventional electromagnetic relay in that the drive unit 4 is mounted on the fixed contact unit 5 to be an intermediate completed body, and all lead terminals are mounted at predetermined positions in the intermediate completed body state. Assembly and intermediate tests are extremely easy.
[0037]
The base 6 to which the fixed contact unit 5 is mounted is formed with a plurality of through holes 61 that penetrate the lead portions of the lead terminals, and all the lead terminals provided at predetermined positions of the intermediate finished product are passed through the through holes 61. The assembly of the electromagnetic relay is completed by being inserted into.
[0038]
By adopting the L-shaped movable contact spring and mounting the fixed contact unit to which the drive unit is mounted in parallel with the base, the moving direction of the armature and the movable contact is the same as that of the conventional electromagnetic relay. It becomes parallel and it becomes possible to improve the absorption of operation sound.
[0039]
In addition, the use of a lead terminal having a lead portion that penetrates the base on one side with a U-shaped spring sandwiched on the other side reduces the number of parts and facilitates automatic assembly of the electromagnetic relay. It becomes possible to shorten the time required for connection.
[0040]
In addition, by installing the fixed contact unit parallel to the base, the lead terminals are arranged around the fixed contact unit, making it easy to secure the cross-sectional area of the lead terminals that satisfy the current carrying capacity and at the same time further reducing the size of the electromagnetic relay. It becomes possible to do.
[0041]
That is, it is possible to realize an electromagnetic relay that can improve the absorption of operation noise and can be easily miniaturized with automatic assembly.
[0042]
【The invention's effect】
As described above, according to the present invention, it is possible to provide an electromagnetic relay that can improve the absorption of operation sound, can be easily assembled automatically, and can be miniaturized.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a main part of an electromagnetic relay according to the present invention.
FIG. 2 is a perspective view showing details of a drive unit.
FIG. 3 is a perspective view showing details of a fixed contact unit.
FIG. 4 is a perspective view showing a main part of a conventional electromagnetic relay.
[Explanation of symbols]
4 Drive unit 5 Fixed contact unit 6 Base 41 Coil terminal
42 Bobbin 43 Coil
44 Iron core 45
46 Head 47 Moving contact
48 Movable contact spring 49 Armature
51, 52 Fixed contact spring 53 Internal board
54 Fixed contact 55, 56, 57, 58 Holding groove
61 Through hole 71 U-shaped spring
72 Lead 73, 75, 76, 81 Connection piece for connection
74, 77, 78, 82 Lead terminal 79 Slit
80 protrusions

Claims (1)

Having at least one drive unit, a fixed contact unit to which the drive unit is mounted, and a base to which the fixed contact unit is mounted;
The drive unit is wound around a bobbin provided with a coil terminal and has an end connected to the coil terminal, and one end attached to the top of the bobbin and fixed to the tip of an iron core passing through the bobbin. A yoke, a movable contact spring having a movable contact at one end and the other end fixed to the yoke, and an armature fixed to the movable contact spring against the open end surface of the iron core and the yoke Have
The fixed contact unit includes two fixed contact springs to which at least a pair of fixed contacts that oppose each other across the movable contact are fixed, and holding grooves that hold both ends of the fixed contact spring. A substrate,
The lead terminals that are electrically connected to the fixed contact spring, the coil terminal, and the movable contact spring are each composed of a long plate-like member having a plate thickness smaller than the plate width, and a plate width surface in the middle portion. A U-shaped spring bent in a U-shape so as to face each other, a lead portion that penetrates the base is formed in one part of the U-shaped spring, and a connecting connection piece is integrally formed in the other part,
The lead terminal connected to each of the fixed contact spring and the coil terminal is disposed so that the arc portion of the U-shaped spring is directed to the inside of the base, and the connecting connecting piece is more than the coil of the drive unit. It is electrically connected to each of the fixed contact spring and the coil terminal at the bottom, the lead portion penetrates the base, and the end portion projects from the back surface of the base as an external terminal,
The lead terminal connected to the movable contact spring, said as arcuate portion of the U-shaped spring toward the inside of the base, the drive unit the coupling connecting piece is arranged along the side surface of the drive unit Is electrically connected to the movable contact spring above the coil , the lead portion penetrates the base, and the end portion projects from the back surface of the base as an external terminal,
Only the lead terminal connected to each of the fixed contact spring, the coil terminal, and the movable contact spring supports the fixed contact unit and the drive unit.

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