KR100676346B1 - Anti-noise Relay Structure - 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 silent relay that reduces the contact noise generated when the movable steel piece of the relay rotates. The configuration of the present invention is a bobbin coil wound; A movable iron piece positioned to face one side of the bobbin; A leaf spring to which the movable iron piece is attached and supporting the movable iron piece so as to move closer to or away from the bobbin portion; A movable contact portion protruding from one end of the movable spring piece side of the leaf spring; A movable contact formed on the movable contact; A fixed contact positioned to face the movable contact; And an elastic stopper for 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 due to the operation of the relay by improving the shape of the movable iron piece, the leaf spring or the stopper, which makes repeated contact with the driving of 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 side view showing the operation of a general relay structure.

4 is a view showing a conventional stopper structure and the elastic stopper structure of the present invention.

It is a figure which shows the elastic stopper of this invention.

Figure 6 is a view showing a conventional leaf spring, the movable iron piece and the leaf spring, the movable iron piece of the present invention.

7 is an enlarged view of a portion of the movable iron piece of the present invention.

It is a figure which shows the conventional movable iron piece and the movable iron piece of this invention.

Fig. 9 is a diagram showing the relay of the present invention with the cover on.

10 is a view showing a configuration for bringing the fixed contact and the movable contact in close proximity of the present invention.

<Description of Symbols for Main Parts of Drawings>

100: bobbin section 110: yoke

120: coil 130: bobbin

132: fixed contact 140: movable iron

150: leaf spring 152: movable contact

154: movable contact 156: tongue

160: core 200: base portion

210: stopper 220: pin

230: base 300: elastic stopper

310: fixed end 320: contact end

400: cover

The present invention relates to a relay that is widely applied to automobiles and other industrial equipment, and more particularly, to provide a silent 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. The relay to be dealt with in the present invention has been disclosed in Patent Publication No. 1997-60286.

Such a relay can easily dissipate heat generated in a coil to the outside and has an excellent function of minimizing internal resistance by simplifying a current moving path in a circuit. A relay of this feature is shown in FIG. Referring to FIG. 1, the coil 120 is wound in a vertical direction, and a contact point for driving a relay is located below the bobbin 130 on which the coil 120 is wound. Even in the case of relays having such performance, a certain level of noise is generated regularly, and the cause of the configuration in which the noise is generated in the relay is examined in detail and the problem is explained.

The bobbin part 100 is a bobbin 130 to which the coil 120 is wound, a yoke 110 surrounding one side from the upper surface of the bobbin 130 with a memory, and a movable iron piece 140 positioned at the bottom surface of the bobbin 130. ), Supporting the movable iron piece 140, and includes a leaf spring 150 (Fig. 2) to enable rotation. The lower side of the bobbin portion 100 is coupled to the base portion 200, the base portion 200 is provided with a pin 220 downward, upward to support the rear of the movable contact portion 152 of the leaf spring 150 The stopper 210 is formed. This configuration will be described in more detail with reference to FIG. 2.

2 is an exploded view illustrating a general relay structure. Referring to FIG. 2, the movable iron piece 140 is positioned on the lower side of the bobbin 130, and the movable iron piece 140 is coupled to an upper side of the horizontal portion of the leaf spring 150 that is bent upwardly toward the rear side. The rear side of the leaf spring 150 is coupled to the outside of the rear side of the yoke 110 while the horizontal portion is bent upwards, and serves to support and rotate the movable iron piece 140 to receive a force in a predetermined direction.

The horizontal portion of the leaf spring 150 has a portion extending more protruding than the movable iron piece 140 while coupling the movable iron piece 140 to the upper side, which is referred to as the movable contact portion 152. When the movable iron piece 140 has magnetic force or loss due to the energization and interruption of the bobbin 130, the movable iron piece 140 is rotated as it moves toward or away from the bobbin 130, and at this time, the movable iron piece 140 ) Is coupled to the horizontal end portion of the leaf spring 150, that is, the movable contact portion 152 as well. A movable contact 154 is provided on the upper surface of the movable contact portion 152, and a fixed contact 132 (FIG. 3) is provided at a position facing the upper side of the movable contact 154 so that the movable contact 154 and the fixed contact are provided. 132 may be in contact with each other.

As a result, when a current is applied to the coil 120, the movable iron piece 140 moves upward due to the generated magnetic force, and at this time, the movable contact 154 of the movable contact part 152 is in contact with the fixed contact 132. It will act as a path of energization. After that, when the current is stopped in the coil 120, the movable iron piece 140 moves downward due to the force of the leaf spring 150, and at this time, the movable contact 154 of the movable contact portion 152 is a fixed contact 132 Fell apart).

When the movable contact 154 moves away from the fixed contact 132, the stopper 210 is placed on the base 200 at a corresponding position on the bottom surface of the movable contact 152 to limit the moving distance of the movable contact 154. Equipped. The stopper 210 plays a role of generating noise in the relay, and the cause thereof will be described in detail in the following drawings.

3 is a side view showing the operation of a general relay structure. Referring to Fig. 3, (a) shows the operation during energization, and (b) shows the operation during disconnection. When a current is applied to the coil 120, the core 160 is magnetized, and the movable iron piece 140 moves and contacts the core 160. At this time, the movable contact portion 152 of the leaf spring 150 connected to the movable iron piece 140 also moves upward, and the movable contact 154 located on the upper surface of the movable contact portion 152 is in contact with the fixed contact point 132.

When the current flowing through the coil 120 is stopped, the movable iron piece 140 moves downward by the restoring force of the leaf spring 150, and the lower surface of the movable contact part 152 contacts the stopper 210 to move. Will stop.

As the moving piece moves according to the energization and disconnection of the relay, it generates repetitive noise. At the time of energization, first, the fixed contact 132 and the movable contact 154 generates noise while contacting each other, and second, the movable iron piece 140 contacts the core 160 to generate noise. Third, when the power is cut off, the movable contact portion 152 of the leaf spring 150 and the stopper 210 are in contact with the A portion to generate noise, and fourth, the contact between the leaf spring 150 and the movable iron piece 140. Noise is generated in the part. Such noise is measured at about 54 dB at a distance of 90 cm, and this noise is often repeated regularly, and in a machine or device such as a passenger car in which quietness is emphasized, the user may be uncomfortable. Therefore, there is a need to reduce such contact noise.

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 stopper, the movable iron piece and the leaf spring of the relay.

The configuration of the present invention, in the relay, the coil is wound bobbin; A movable iron piece positioned to face one side of the bobbin; A leaf spring to which the movable iron piece is attached and supporting the movable iron piece so as to move closer to or away from the bobbin portion; A movable contact portion protruding from one end of the movable spring piece side of the leaf spring; A movable contact formed on the movable contact; A fixed contact positioned to face the movable contact; And an elastic stopper for 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 elastic stopper is characterized in that it comprises a contact end which is fixed by a fixed end at a position facing the leaf spring and extends in a direction proximate to the leaf spring from the fixed end.

The elastic stopper is characterized in that: a portion away from the fixed end is bent so that the contact end is inclined at an angle with respect to the fixed end.

The elastic stopper is characterized in that the contact end is bent relative to the fixed end such that the contact end is inclined contact with a predetermined position of the leaf spring.

The leaf spring is characterized in that for forming a tongue bent to protrude in the direction of the movable iron piece, at a predetermined position from the portion coupled with the movable iron piece to the movable contact portion.

The tongue is characterized in that the other part except the one portion is formed by cutting from the leaf spring in a state in which one portion is connected to the leaf spring.

The movable iron piece is characterized in that for forming a groove portion to be spaced apart from the leaf spring at the end portion of the leaf spring in the direction of the movable contact portion.

The movable contact portion is bent to approach the fixed contact facing each other.

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

The movable iron piece is characterized in that the thickness of the end portion of the leaf spring in the direction of the movable contact portion is made thin so as to have a stepped shape.

It is characterized in that the configuration of the main body including the bobbin portion and the movable iron piece using a cover of the silent characteristic.

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 stopper structure and the elastic stopper structure of the present invention. Referring to Figure 4, (a) has a conventional stopper 210 structure, (b) is a side view of a relay having a structure of the elastic stopper 300 of the present invention.

As described above, since the conventional stopper 210 is fixed to the base 230, the stopper 210 is strongly in contact with the movable contact portion 154 at the portion A by the restoring force of the leaf spring 150. In the present invention, an elastic stopper structure having elasticity and capable of buffering is employed, rather than a hard and rigid stopper structure.

Referring to (b), the elastic stopper 300 supports the lower surface of the horizontal portion of the leaf spring 150 and presses upward. At this time, the structure of the elastic stopper 300 is bent in the middle portion, and has a feature that is in contact with the leaf spring 150 at an oblique angle at a gentle angle. Since the elastic stopper 300 is a metallic material having elasticity, the elastic stopper 300 bent within the elastic range serves to cushion and support the movement of the movable iron piece 140. If the conventional stopper 210 serves only to limit the movement of the leaf spring 150 in the final position, the stopper 210 of the present invention is the plate spring 150 and the elastic stopper 300 in advance from the intermediate position In contact with the buffer.

Eventually, even if the movable iron piece 140 moves downward by the restoring force of the leaf spring 150, before the movable iron piece 140 has a large impact amount, the elastic stopper 300 gradually reduces its moving speed and limits the movement. As a result, the contact friction sound is relatively reduced. In order for the elastic stopper 300 to have a more effective cushioning action, the elastic stopper 300 is located close to the center side of the movable iron piece 140 rotation, that is, the bent portion where the vertical and horizontal portions of the leaf spring 150 meet. It is desirable to position. The configuration of the elastic stopper 300 to play this role is shown in FIG.

It is a figure which shows the elastic stopper of this invention. Referring to FIG. 5, the elastic stopper 300 is fixed to the base 230 by a fixed end 320 at a lower side thereof, and a contact end 310 extending upward from the fixed end 320 has a middle portion B. As shown in FIG. Is bent and formed obliquely. Since the elastic stopper 300 is a metallic material having elasticity, the contact end 310 is elastically movable in the vertical direction based on the bent portion (B).

Therefore, the lower surface of the horizontal portion of the leaf spring 150 is supported by the contact end 310, at which time the contact end 310 is buffered and pushed downward in the elastic range to support the leaf spring 150 upwards do. The leaf spring 150 and the contact end 310 may be spaced apart, and in some cases, the contact end 310 may always be in contact with the bottom surface of the leaf spring 150. The bending angle between the fixed end 320 and the contact end 310 is the distance between the leaf spring 150 and the surface of the base 230, the shape, the length of the leaf spring 150, the movable contact 154, the fixed contact ( 132 may be appropriately adjusted according to the size, interval, and the like.

Figure 6 is a view showing a conventional leaf spring, the movable iron piece and the leaf spring, the movable iron piece of the present invention. Referring to Figure 6, (a) is a view for showing a contact generated between the lower side of the conventional movable iron piece 140 and the upper side of the leaf spring 150, (b) to prevent such contact In order to show the contact of the state in which the shape of the movable contact part 152 side of the leaf spring 150 is deformed.

When the current flowing in the coil 120 is stopped, the movable iron piece 140 is rotated downward in accordance with the restoring force of the leaf spring 150, at which time the movement of the leaf spring 150 suddenly by the stopper 210 While being interrupted, collision occurs in the C portion between the movable iron piece 140 and the leaf spring 150 by inertia, thereby generating noise. This is because the movable iron piece 140 and the leaf spring 150 are not completely in contact with each other, and only a part of the movable iron piece 140 is coupled in a state where there is a minute gap.

In order to prevent this, as shown in (b), the tongue 156 is provided with a buffer function between the fine gaps. The tongue 156 is formed on the side of the movable contact portion 152 of the leaf spring 150 having a relatively large rotation angle and distance, and is bent at a predetermined angle relative to the original surface of the movable contact portion 152 to be in contact with the movable iron piece 140. It is desirable to. The tongue 156 may be connected to the leaf spring 150 only at one portion, such as the tongue, and the other portion may be separated and bent at a different angle from the other surface.

Since the tongue 156 is bent toward the movable iron piece 140 to be in contact with each other, the tension is always maintained between the movable iron piece 140 and the leaf spring 150, and the elasticity and cushioning of the tongue 156 is prevented even if there is an external impact. By the action, the impact amount becomes relatively small. The shape of the tongue 156 is not particularly limited and may be bent or protruded toward the movable iron piece 140 rather than the surface of the leaf spring 150 to maintain contact with the elastic force.

7 is an enlarged view of a portion of the movable iron piece of the present invention. Referring to FIG. 7, the tongue 156 is formed on the movable contact portion 152 side of the leaf spring 150, and the tongue 156 has an incision E other than the portion D, and is cut in relation to the portion D. The part is bent upward by a predetermined angle. Within the allowable bending stress of the portion D, the tongue 156 is able to buffer. The angle of bending the tongue 156 should be appropriately adjusted, and if excessively bent, the movable contact 154 is bent away from the fixed contact 132, so be careful to bend in the opposite direction, the contact force falls.

It is a figure which shows the conventional movable iron piece and the movable iron piece of this invention. Referring to FIG. 8, (a) is a view showing a state in which a conventional movable iron piece 140 is attached to the leaf spring 150 and the shape of the movable iron piece 140, and (b) is a movable iron piece of the present invention ( 140 is a view showing the state attached to the leaf spring 150 and the shape of the improved movable iron piece 140.

The conventional movable iron piece 140 has a thick t1 and a lot of weight. Therefore, when the friction between the movable iron piece 140 and the core 160, the impact amount is large and a lot of noise is generated. In addition, as described above, noise occurred between the movable iron piece 140 and the leaf spring 150.

Movable iron piece 140 of the present invention is to first reduce the thickness (t2) and reduce the overall weight, so that the impact amount at the time of friction between the movable iron piece 140 and the core 160. Secondly, a groove is formed at the end side of the movable iron piece 140 or a step is formed so that spaced spaces F are formed. In this case, even when the movable contact 154 is shaken in both directions when the movable contact 154 is in contact with the stationary contact 132, the movable contact 152 is not in contact with the movable iron piece 140. Such grooves and steps are formed on the movable contact portion 152 on the basis of the point where the movable iron piece 140 and the leaf spring 150 are coupled to each other.

Fig. 9 is a diagram showing the relay of the present invention with the cover on. Referring to Fig. 9, (a) and (b) are cross-sectional and longitudinal cross-sectional views of a relay having a cover, and (c) is a diagram showing an appearance. The upper configuration of the bobbin portion 100 and the base portion 200 where noise is mainly generated, that is, the structure of the main body including the movable iron piece 140, the leaf spring 150, and the elastic stopper 300 may include a cover having a silent characteristic. By covering the base 400 and coupled to the base 230, the noise is prevented from leaking outward.

In particular, by using the material having a silent feature as the material of the cover 400, the noise generated in the movable iron piece 140, the leaf spring 150, etc. are not only blocked by the cover 400, but also absorbed. To this end, a material having a sound absorption function and a configuration are used as the material of the cover 400, and it is preferable to manufacture the cover 400 using a synthetic resin of a fine porous material. In addition, the size of the cover 400 is reduced by about 20 to 30% so that the empty space in the cover 400 is minimized, so that the internal space is made small so that the internal noise does not leak out.

10 is a view showing a configuration for bringing the fixed contact and the movable contact in close proximity of the present invention. Referring to FIG. 10, (a) shows a state in which a distance g1 between the movable contact 154 and the fixed contact 132 is large in the conventional relay, and (b) shows the relay of the present invention. In this case, the distance g2 between the movable contact 154 and the fixed contact 132 is reduced. (c) is a method for reducing the distance (g2) between the movable contact 154 and the fixed contact 132 by the elastic stopper 300, (d) is formed by bending the movable contact portion 152 to the movable contact The distance g2 between 154 and the fixed contact 132 is reduced.

When the distance between the movable contact 154 and the fixed contact 132 is large, such as g1, the moving range of the movable iron piece 140 is widened during the operation of the relay to have a larger impact amount. At this time, if the narrowing between the movable contact 154 and the fixed contact 132, the moving range of the movable iron piece 140 is limited, the impact amount is negligible. Therefore, there is a need for a method for narrowing the gap between the movable contact 154 and the fixed contact 132.

Referring to (c), the elastic stopper 300 to reduce the distance g2 between the movable contact 154 and the fixed contact 132, that is, to bring the movable contact 154 closer to the fixed contact 132. ). Since the elastic stopper 300 is in contact with the lower surface of the horizontal portion of the leaf spring 150 to push the leaf spring 150 upward, the leaf spring 150 is upper by adjusting the shape of the elastic stopper 300. It is pushed further towards. That is, when the contact end 310 of the elastic stopper 300 is bent to maintain the state further raised upward, the leaf spring 150 is further pushed upward so that the movable located at the end of the leaf spring 150 The contact 154 is in close contact with the fixed contact 132, the moving range of the moving iron piece 140 is small, the impact amount is reduced.

Alternative methods may be used. Referring to (d), the predetermined position (G) toward the movable contact portion 152 of the leaf spring 150 is bent separately from the elastic stopper 300 so that the movable contact portion 152 bends toward the fixed contact point 132. You can also use the method. At this time, similarly, the moving range of the movable iron piece 140 is limited, thereby reducing the pressing force between the movable contact 154 and the fixed contact 132 at the contact point, and also reducing the noise due to the impact.

Through various configurations and methods as described above, it is possible to somewhat reduce the noise generated in the relay. Relays used in car headlights generate 54 dB of noise at a distance of 90 cm, which can be reduced to less than 45 dB. The noise reduction effect according to each method described above is summarized as follows (based on the relay for automobile headlights).

According to the present invention, an improved shape, structure, and combination of the relays reduce noise of about 10 dB, thereby preventing and reducing unnecessary relay operation and generation of return noise.

The present invention has the effect of reducing the contact noise due to the operation of the relay by improving the shape of the movable iron piece, the leaf spring or the stopper, which makes repeated contact with the driving of the relay.

Claims (11)

In the relay, Bobbin coiled; A movable iron piece positioned to face one side of the bobbin; A leaf spring to which the movable iron piece is attached and supporting the movable iron piece so as to move closer to or away from the bobbin portion; A movable contact portion protruding from one end of the movable spring piece side of the leaf spring; A movable contact formed on the movable contact; A fixed contact positioned to face the movable contact; And And an elastic stopper for supporting the coil to limit a range in which the movable contact portion is moved outward as current flows or stops. The leaf spring is a silent relay, characterized in that for forming a tongue that is bent to protrude in the direction of the movable iron piece, at a predetermined position from the portion coupled with the movable iron piece to the movable contact portion. The method of claim 1, wherein the elastic stopper is: In a position facing the leaf spring, And a contact end fixed by the fixed end and extending from the fixed end in a direction proximate to the leaf spring. The method of claim 2, wherein the elastic stopper is: A portion away from the fixed end is bent so that the contact end is inclined at a predetermined angle with respect to the fixed end. 4. The elastic stopper of claim 3 wherein: Silent relay, characterized in that the contact end is bent relative to the fixed end such that the contact end is inclined contact with a predetermined position of the leaf spring. delete The method of claim 1, wherein the tongue is: Silent relay, characterized in that the other part except the one portion is formed by cutting from the leaf spring in a state in which one portion is connected to the leaf spring. The movable iron piece according to any one of claims 1 to 4 or 6, wherein: Silent relay, characterized in that for forming a groove portion to be spaced apart from the leaf spring at the end portion of the leaf spring in the direction of the movable contact portion. The method according to any one of claims 1 to 4 or 6, And the movable contact portion is bent to approach the fixed contact facing each other. delete The movable iron piece according to any one of claims 1 to 4 or 6, wherein: And the thickness of the end portion of the leaf spring in the direction of the movable contact portion is made thin so as to form a stepped shape. The method according to any one of claims 1 to 4 or 6, Silent relay, characterized in that for covering the configuration of the main body including the bobbin portion and the movable iron piece using a cover of the silent characteristic.

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