KR100676345B1 - Silent relay - Google Patents

Abstract

The present invention relates to a relay that is widely applied to automobiles and other industrial equipment, and more particularly to provide a relay that reduces the contact noise generated when the movable steel piece of the relay rotates. The configuration of the present invention, in the relay, the coil winding coil; A yoke surrounding part of the bobbin portion; A movable iron piece positioned to face the other side of the bobbin portion; A leaf spring attached to the yoke and the movable iron piece to support the movable iron piece to move closer to or away from the bobbin portion; A movable contact portion formed at one end of the movable iron piece side of the leaf spring and having a movable contact; A catch portion formed on a side of the movable contact portion of the leaf spring; A fixed contact positioned to face the movable contact of the movable contact; And a stopper supporting the coil to limit a range in which the movable contact portion is moved outwardly as the current flows or stops in the coil.

The present invention has the effect of reducing the contact noise according to the operation of the relay by improving the shape of the movable iron piece, the leaf spring, the stopper and the like repeatedly making contact with the relay.

Description

Anti-noise Relay Structure

1 is a diagram illustrating a general relay structure.

2 is an exploded view illustrating a general relay structure.

3 is a diagram illustrating a general relay structure in plan view.

4 is a view showing a conventional movable iron piece, a leaf spring and the movable iron piece, the leaf spring of the present invention.

It is a figure which shows the state which the leaf spring of this invention is attached to the movable iron piece.

6 is an enlarged view of the engaging portion and the movable contact portion of the present invention.

Fig. 7 is a diagram showing the relay of the present invention with the cover on.

<Description of Symbols for Main Parts of Drawings>

10: bobbin part 12: stopper

14: fixed contact 16: coil

20: York 22: protrusion

24: fitting protrusion 30: movable iron

30a: rotating part 30b: reference part

32: locking protrusion 34: attachment hole

36: incision 38: groove

40: leaf spring 42: movable contact portion

43: movable contact 44: mounting hole

46: engaging portion 48: locking portion

50: wire 60: pin

70: cover

The present invention relates to a relay that is widely applied to automobiles and other industrial equipment, and more particularly to provide a relay that reduces the contact noise generated when the movable steel piece of the relay rotates.

A relay is a device that operates when an input reaches a value to open and close other circuits, such as a relay with a contact or a contactless relay without a contact, and a pressure, temperature, and optical relay. The structure of a general relay having a contact is disclosed in FIG. 1. Such a general relay generates a certain level of noise regularly. The configuration of the general relay and the cause of the noise in the relay will be described in detail.

Referring to FIG. 1, a relay having a contact generally includes a bobbin (10) and a base portion (11) coupled to a lower side of the bobbin portion (10) for fixing a plurality of contact terminals. And a bobbin fixed to the yoke 20 in a cylindrical state in which the yoke 20 is coupled to the bobbin part 10 and the base part 11, and the coil 16 is wound around the bobbin part 10. The iron core (not shown) mounted on the bobbin portion 10 and the yoke 16 in a form penetrating the bobbin and magnetized according to the power applied to the coil 16 wound on the bobbin, and one side of the yoke 20. The movable iron piece 30 is elastically movable in accordance with the magnetic force acting on the movable iron piece 30 while the movable iron piece 30 is coupled to the movable iron piece 30 and the movable iron piece 30 is connected to the yoke 20. It consists of a leaf spring 40 to control. The leaf spring 40 is coupled to the engaging portion 46 formed to extend in the yoke 20 side is fitted to the protrusion 22 formed on the yoke 20.

In addition, a movable contact portion 42 having a movable contact 43 in contact with the stationary contact 14 is formed at the end of the leaf spring 40, and the movable contact 43 is connected to the conductive wire 50. When the relay applies current to the coil 16 wound on the bobbin, electromotive force is generated, so that the iron core is magnetized to become an electromagnet. Accordingly, since the iron core sucks the movable iron piece 30 positioned on one side, the movable iron piece 30 is rotated while deforming the leaf spring 40 inward, and the movable contact portion 42 is attached to the leaf spring 40. Contact the fixed contact 14. That is, when power is supplied to the coils 16 wound on the bobbin, magnetic force is generated in the iron core and the moving iron pieces 30 are attracted to each other so that the energizing plate spring 40 attached to the moving iron pieces 30 is connected to the contacts. Connect the broken one wire and turn on the power.

 On the contrary, when the power flowing through the coil 16 is cut off, the magnetic force of the iron core is lost, and the movable iron piece 30 is separated from the iron core by the restoring force of the leaf spring 40. At this time, when the connection is broken by the restoring force of the leaf spring 40, the stopper 12 is provided to support the leaf spring 40 from the outside. The stopper 12 may be attached or formed on the side of the base portion 11, or may be formed by changing a part of the bobbin portion 10 as shown in FIG.

In order to explain such a conventional relay structure, a part of the configuration will be described. Referring to FIG. 2, the core 18 is exposed on one surface along the center of the coil 16 provided in the bobbin part 10. The stationary contact 14 and the stopper 12 are provided in one surface side.

The movable iron piece 30 is coupled to and supported by the yoke 20 by the leaf spring 40 so as to face one surface side. The base portion groove 36 is inserted into the fitting protrusion 24 formed at the end of the yoke 20, and serves as a center point of rotation in the state where the fitting protrusion 24 is inserted into the reference portion groove 36. At this time, the opposite end side in which the engaging protrusion 32 is formed is rotated, and the side in which the reference part groove 36 is formed is a reference center point of the rotation. Therefore, the side portion on which the reference portion groove 36 is formed based on the middle portion is referred to as the pivot portion 30a.

Rotating portion (30a) is to move closer to or away from the bobbin portion 10 side is fixed contact 14 is formed, the stopper 12 is formed to prevent the rotational portion (30a) side is completely separated. The stopper 12 is caught by the locking protrusion 32 of the movable iron piece 30.

The plate spring 40 is coupled to the movable iron piece 30, and the movable spring portion 42 is formed at the plate spring 40, and the movable contact 43 is formed at the movable contact portion 42 so that the fixed contact ( 14) comes into contact. A separate pin 60 (refer to FIG. 5) is inserted into the attachment hole 34 formed in the movable iron piece 30 and the attachment hole 44 formed in the leaf spring 40, thereby enabling coupling. Coupling portion 46 is elongated by 90 degrees is caught by the protrusion 22 formed in the yoke (20). As a result, the leaf spring 40 serves to support the movable iron piece 30 and the movable contact portion 42 in a direction away from the core 18 and the fixed contact 14.

On this conventional relay structure, noise due to impact and contact is somewhat generated. In particular, between the movable iron piece 30 and the core 18, between the stationary contact 14 and the movable contact 43, between the movable iron piece 30 and the leaf spring 40 and the locking portion 32 of the movable iron piece 30 The noise is mainly generated between the and the stopper 12. Referring to FIG. 3, (a) is a planar configuration diagram when the movable iron piece 30 is operated at the time of energization and the contacts come into contact, and (b) is the movable iron piece 30 is returned at the time of power loss. When the plan is a plan configuration drawing.

In the relay having such a configuration, noise occurs during operation and noise occurs upon return. In operation as shown in (a), the movable iron piece 30 contacts the core 18 and noise is generated, and the movable contact 42 contacts the fixed contact 14 and noise is generated. At the time of returning as shown in (b), while the movable iron piece 30 is pushed out by the elasticity of the leaf spring 40, the locking protrusion 32 contacts the stopper 12, thereby causing the locking protrusion 32 and the stopper 12 to rest. At the same time, noise is generated between the movable iron piece 30 and the leaf spring 40. This noise is measured at 52dB at a distance of 90cm.

 The present invention has been made to solve the above problems, an object of the present invention is to propose a silent relay structure that can reduce the contact friction sound by improving the shape of the movable iron piece and the leaf spring of the relay.

The configuration of the present invention for achieving the above object, in the relay, the coil winding bobbin; A yoke surrounding part of the bobbin portion; A movable iron piece positioned to face the other side of the bobbin portion; A leaf spring attached to the yoke and the movable iron piece to support the movable iron piece to move closer to or away from the bobbin portion; A movable contact portion formed at one end of the movable iron piece side of the leaf spring and having a movable contact; A catch portion formed on a side of the movable contact portion of the leaf spring; A fixed contact positioned to face the movable contact of the movable contact; And a stopper supporting the coil to limit a range in which the movable contact portion is moved outwardly as the current flows or stops in the coil.

The movable iron piece includes a reference portion serving as a pivot center, and a pivoting portion at an end portion that is rotated, and the leaf spring is attached to an outer surface of the movable iron piece, and the movable contact portion of the leaf spring is provided on the pivoting side. And the locking portion protrudes from an end boundary of the pivoting portion.

The movable iron piece is characterized by reducing the area of the movable iron piece in contact with the movable contact portion by cutting the rotating part in contact with the protruding movable contact portion.

The movable iron piece is characterized by reducing the area of the movable iron piece in contact with the engaging portion by cutting the rotating portion in contact with the protruding engaging portion.

The movable contact portion may be bent to approach the fixed contact direction facing each other.

The stopper is positioned to face the locking portion so that the locking portion is limited in rotation in the outward direction by the stopper, and the locking portion is bent to approach the stopper direction.

The stopper is formed integrally with the bobbin portion, characterized in that formed in a position close to the movable iron piece.

The thickness of the movable iron piece is reduced, characterized in that to form a thin.

The yoke, the bobbin portion and the structure of the main body including the movable iron piece are characterized by covering the cover using a silent characteristic.

The movable iron piece is characterized by reducing the area of the movable iron piece in contact with the movable contact portion by forming a groove in the rotating portion in contact with the protruding movable contact portion.

The movable iron piece is characterized by reducing the area of the movable iron piece in contact with the engaging portion by forming a groove portion in contact with the projecting engaging portion.

 Hereinafter, with reference to an embodiment of the present invention described in the accompanying drawings, it will be described in detail the configuration of the present invention.

 4 is a view showing a conventional movable iron piece, a leaf spring and the movable iron piece, the leaf spring of the present invention. Referring to Fig. 4, (a) is a conventional movable iron piece, and (b) and (c) are movable iron pieces of the present invention.

In the movable iron piece of the present invention, there is no locking protrusion 32 as in the related art, and a part of the pivoting portion 30a located outside the attachment hole 34 is cut to form the cutout portion 36, or the pivoting portion 30a. The groove 38 is formed in the groove. The cutout 36 may be provided at both sides, and the cutout 36 is to minimize the area of the rotating part 30a of the movable iron piece 30 that is in close contact with the leaf spring 40 based on the attachment hole 34. .

That is, by forming the cutouts 36 on both sides, the leaf spring 40 is fixed to the movable iron piece 30, while the leaf spring 40 is fixed to the movable contact portion 42 side and the engaging portion 48 side portion. The contact area is relatively reduced. Instead of the cutout 36, the groove 38 is formed so that the movable contact portion 42 side and the locking portion 48 side of the leaf spring 40 and the pivoting portion 30a of the movable iron piece 30 are spaced apart. It is also possible to prevent mutual contact.

On the other hand, (d) is a conventional leaf spring, and (e) is a leaf spring of the present invention. In the related art, the locking protrusion 32 is formed on the movable iron piece 30 so that the movable iron piece 30 is caught by the stopper 12, but the present invention allows the locking portion 48 to be formed on the leaf spring 40. Since the locking portions 48 of the thin and elastic leaf springs 40 are not in contact with the thick locking protrusions 32 of the movable iron piece 30, the stopper 12 contacts the stopper 12, thereby reducing noise.

It is a figure which shows the state which the leaf spring of this invention is attached to the movable iron piece. Referring to FIG. 5, a method of reducing the noise by improving the shape of the movable iron piece 30 and the leaf spring 40 is illustrated. (a) and (b) shows a state in which the conventional movable iron piece 30 and the leaf spring 40 is coupled, (c) and (d) is the movable iron piece 30 and the leaf spring 40 of the present invention This shows the combined state.

In (a) and (b), since the locking projection 32 is formed in the movable iron piece 30, not only does noise generate | occur | produce at the time of contact with the stopper 12, but also the rotation part 30a and the leaf spring 40 Secondary noise was generated at the contact portion between the), particularly at the contact portion located on the right side (in the drawing) than the attachment hole 44.

As shown in (c), when the locking protrusion 32 is removed from the movable iron piece 30, and both edge portions are cut to form the cutout 36, the area of the pivot 30a itself decreases and the leaf spring 40 is reduced. Since the contact area with) is reduced, the secondary noise is reduced. In addition, instead of contacting the stopper 12 with a thick and rigid movable iron piece 30 directly, the noise is reduced because it contacts the stopper 12 through the engaging portion 48 of the thin leaf spring 40 of the elastic material.

Spaced space between the plate spring 40 and the movable iron piece 30 on the right side (in the drawing) of the portion where the movable iron piece 30 and the leaf spring 40 are in close contact with each other by the pin 60 as shown in (d). The groove part 38 is formed so that this may exist. In this case, even when the movable contact 43 shakes in both directions when the movable contact 43 comes into contact with or falls from the fixed contact 14, no contact with the movable iron piece 30 occurs.

6 is an enlarged view of the engaging portion and the movable contact portion of the present invention. Referring to FIG. 6, the locking portion 48 or the movable contact portion 42 may be improved to minimize the gap between the fixed contact 14 and the movable contact 43 to reduce the contact strength and to reduce the contact force of the leaf spring 40. It also provides a configuration that reduces the shaking to reduce the occurrence of secondary noise.

(a) shows an enlarged configuration of the locking portion 48 and the stopper 12, and bends (part E) a predetermined portion of the leaf spring 40 toward the stopper 12 and protrudes toward the stopper 12. Be sure to Thus, even if only a slight rotation of the movable iron piece 30, the engaging portion 48 is in contact with the stopper 12 has the effect of reducing the moving range of the movable iron piece (30). Accordingly, the room for noise is reduced during operation and return of the movable iron piece 30.

(b) shows an enlarged configuration of the movable contact portion 42 and the fixed contact point 14, by bending a predetermined portion of the movable contact point 42 (F portion) to approach and project toward the fixed contact point 14. , The distance G between the movable contact 43 and the fixed contact 14 is reduced. As a result, the movable iron piece 30 allows the fixed contact 14 and the movable contact 43 to come into contact with each other even if only a slight approach toward the core 18 occurs. Therefore, similarly, the moving range of the movable iron piece 30 is reduced, and the noise is less likely to occur.

In addition to the above method, there is a method of bringing the stopper 12 closer to the bobbin portion 10 to reduce the moving range of the locking portion 48. In addition, there is a method of reducing the cost by reducing the thickness of the movable iron piece 30, and at the same time reduce the weight.

Fig. 7 is a diagram showing the relay of the present invention with the cover on. Referring to FIG. 7, a cover 70 having a silent characteristic covers a configuration of a main body including a yoke, a bobbin part, and a movable iron piece that generate noise to block noise from being generated. Due to the silent cover 70, the noise generated from the movable iron piece 30, the leaf spring 40 and the like is not only blocked by the cover 70, but also absorbed. To this end, the sound absorbing function is used as the material of the cover 70, and it is preferable to manufacture the cover 70 using a synthetic resin of a fine porous material.

Through the method as described above, it is an object to slightly reduce the noise generated in the relay. Relays used in car headlights produce 52dB of noise at a distance of 90cm, which can be reduced to less than 45dB. The noise reduction effect according to each method described above is summarized as follows (based on the relay for automobile headlights).

The improved shape, structure, and combination of the relay according to the present invention was shown to reduce the noise of about 6 ~ 10dB, it can be seen that unnecessary relay operation, return noise is reduced.

The present invention has the effect of reducing the contact noise according to the operation of the relay by improving the shape of the movable iron piece, the leaf spring, the stopper and the like repeatedly making contact with the relay.

Claims (11)

delete delete In the relay, A bobbin section to which a coil is wound; A yoke surrounding part of the bobbin portion; A movable iron piece positioned to face the other side of the bobbin portion; A leaf spring attached to the yoke and the movable iron piece to support the movable iron piece to move closer to or away from the bobbin portion; A movable contact portion formed at one end of the movable iron piece side of the leaf spring and having a movable contact; A catch portion formed on a side of the movable contact portion of the leaf spring; A fixed contact positioned to face the movable contact of the movable contact; And And a stopper supporting the coil to limit a range in which the movable contact portion is moved outwardly as a current flows or stops in the coil, The movable iron piece has a reference portion that is a pivot center, and a pivoting portion on the end side that is rotated, and the leaf spring is attached to an outer surface of the movable iron piece, The movable contact portion and the catching portion of the leaf spring protrude from an end boundary of the pivoting portion toward the pivoting portion, By cutting the rotating part of the movable iron piece in contact with the protruding movable contact portion, A silent relay, characterized in that the area of the movable iron piece in contact with the movable contact portion is reduced. In the relay, A bobbin section to which a coil is wound; A yoke surrounding part of the bobbin portion; A movable iron piece positioned to face the other side of the bobbin portion; A leaf spring attached to the yoke and the movable iron piece to support the movable iron piece to move closer to or away from the bobbin portion; A movable contact portion formed at one end of the movable iron piece side of the leaf spring and having a movable contact; A catch portion formed on a side of the movable contact portion of the leaf spring; A fixed contact positioned to face the movable contact of the movable contact; And And a stopper supporting the coil to limit a range in which the movable contact portion is moved outwardly as a current flows or stops in the coil, The movable iron piece has a reference portion that is a pivot center, and a pivoting portion on the end side that is rotated, and the leaf spring is attached to an outer surface of the movable iron piece, The movable contact portion and the catching portion of the leaf spring protrude from an end boundary of the pivoting portion toward the pivoting portion, By cutting the rotating part of the movable iron piece in contact with the protruding engaging portion, The silent type relay, characterized in that the area of the movable iron piece in contact with the engaging portion is reduced. The method according to claim 3 or 4, And the movable contact portion is bent to approach in the direction of the fixed contact facing each other. The method according to claim 3 or 4, The stopper is positioned facing the locking portion so that the locking portion is limited in rotation in the outward direction by the stopper, And the engaging portion is bent to approach the stopper direction. The method according to claim 3 or 4, The stopper is formed integrally with the bobbin portion, the silent relay, characterized in that formed in a position close to the movable iron piece. delete delete In the relay, A bobbin section to which a coil is wound; A yoke surrounding part of the bobbin portion; A movable iron piece positioned to face the other side of the bobbin portion; A leaf spring attached to the yoke and the movable iron piece to support the movable iron piece to move closer to or away from the bobbin portion; A movable contact portion formed at one end of the movable iron piece side of the leaf spring and having a movable contact; A catch portion formed on a side of the movable contact portion of the leaf spring; A fixed contact positioned to face the movable contact of the movable contact; And And a stopper supporting the coil to limit a range in which the movable contact portion is moved outwardly as a current flows or stops in the coil, The movable iron piece has a reference portion that is a pivot center, and a pivoting portion on the end side that is rotated, and the leaf spring is attached to an outer surface of the movable iron piece, The movable contact portion and the catching portion of the leaf spring protrude from an end boundary of the pivoting portion toward the pivoting portion, And a groove portion is formed in the pivoting portion of the movable iron piece which contacts the protruding movable contact portion, thereby reducing the area of the movable iron piece which is in contact with the movable contact portion. In the relay, A bobbin section to which a coil is wound; A yoke surrounding part of the bobbin portion; A movable iron piece positioned to face the other side of the bobbin portion; A leaf spring attached to the yoke and the movable iron piece to support the movable iron piece to move closer to or away from the bobbin portion; A movable contact portion formed at one end of the movable iron piece side of the leaf spring and having a movable contact; A catch portion formed on a side of the movable contact portion of the leaf spring; A fixed contact positioned to face the movable contact of the movable contact; And And a stopper supporting the coil to limit a range in which the movable contact portion is moved outwardly as a current flows or stops in the coil, The movable iron piece has a reference portion that is a pivot center, and a pivoting portion on the end side that is rotated, and the leaf spring is attached to an outer surface of the movable iron piece, The movable contact portion and the catching portion of the leaf spring protrude from an end boundary of the pivoting portion toward the pivoting portion, And a groove portion is formed in the pivoting portion of the movable iron piece which is in contact with the protruding locking portion, thereby reducing the area of the movable iron piece which is in contact with the locking portion.

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