Electromagnetic relay

Abstract

The utility model discloses an electromagnetic relay, which comprises a base and a magnetic circuit part, the magnetic circuit part comprises a coil rack, and the coil rack is arranged on the base; the base is provided with a first welding area, the coil frame is provided with a second welding area, and the first welding area and the second welding area are in contact and are welded together through ultrasonic waves. According to the utility model, the base and the coil rack are fixed by adopting ultrasonic welding, so that the base and the coil rack are reliably fixed, the consistency of product parameters is ensured, assembly plastic scraps are not generated, and the miniaturization design of products is also facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to an electromagnetic relay. BACKGROUND

[0002] The electromagnetic relay is an electronic control device, which is usually applied to an automatic control circuit, and it is actually a kind of ''automatic switch'' for controlling larger current with smaller current, so it plays the role of automatic regulation, safety protection, conversion circuit and the like in the circuit.

[0003] At present, the base and the coil holder of the electromagnetic relay of the prior art are usually fixedly connected by means of buckles or riveting. However, the riveting cannot guarantee that the base is tightly attached to the coil holder, causing a certain amount of movement of the base, thereby causing poor consistency of product parameters. In order to completely attach the base to the coil holder, a very large binding force is required, and the buckles need to be very large in size, so that the buckles are deformed to meet the pulling force requirement, making it difficult for the relay to realize miniaturization, and the buckles are prone to cause scratches. SUMMARY

[0004] The utility model provides an electromagnetic relay in view of technical problem of prior art, it adopts ultrasonic welding base and coil holder, makes base and coil holder reliable fixed.

[0005] The utility model adopts the technical scheme that: an electromagnetic relay, including base and magnetic circuit part, the magnetic circuit part includes coil holder, the coil holder is placed on the base, the base has first welding area, the coil holder has second welding area, the first welding area and the second welding area are contacted and are welded together through ultrasonic.

[0006] Further, the first welding area is provided as at least three places, and the three first welding areas are in triangular distribution; the second welding area is provided as at least three places, and the second welding area corresponds to the first welding area one by one.

[0007] Further, one of the first welding area and the second welding area is provided with at least one welding convex part, and the welding convex part and the other of the first welding area and the second welding area are fused together by ultrasonic welding.

[0008] Further, the other of the first welding area and the second welding area is provided with a welding groove, the welding convex part enters the welding groove, and the welding convex part and the groove bottom and / or groove wall of the welding groove are fused together by ultrasonic welding.

[0009] Further, the welding convex part and the groove bottom and / or groove wall of the welding groove are interference fit before fusion.

[0010] Further, the welding convex part is in the form of a rib.

[0011] Further, the cross-section of the welding convex part is in the shape of an outward convex arc.

[0012] Further, the first welding area and the second welding area are respectively provided with multiple welding convex parts, and the extending directions of the welding convex parts are consistent; at least one of the first welding area or the second welding area is provided with multiple welding convex parts, and the multiple welding convex parts are distributed in a direction perpendicular to the length direction of the welding convex part.

[0013] Further, the coil holder is arranged at one end of the base in the axial direction, and is provided with the second welding area.

[0014] Further, the magnetic circuit part further comprises a yoke, an armature, an iron core and a coil wound on the coil holder, the iron core is arranged in the coil holder, the yoke is in the shape of L, one side of the yoke is fixedly connected with one end of the iron core, and the other side of the yoke is matched with the outside of the coil holder; the armature is arranged at the cutting edge of the other side of the yoke in a rotating manner, and is located between the coil holder at one end in the axial direction and the base; the armature is connected with a moving spring piece, and the moving spring piece is provided with a moving contact point; the coil holder is provided with a static spring piece, and the static spring piece is provided with a static contact point matched with the moving contact point.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. Since the base is provided with the first welding area, and the coil holder is provided with the second welding area, the first welding area and the second welding area are welded together through ultrasonic waves, so that the base and the coil holder are fixed through ultrasonic welding, the base and the coil holder are fixed reliably, the consistency of product parameters is ensured, plastic debris is not generated during assembly, and the product is convenient for miniaturization design.

[0017] 2. The first welding area and the second welding area are respectively provided with at least three welding areas, and the three first welding areas are distributed in a triangular shape, so that the base and the coil holder are more stable after ultrasonic welding by utilizing the good stability of the triangular shape.

[0018] 3. One of the first welding area and the second welding area is provided with at least one welding convex part, and the welding convex part and the other of the first welding area and the second welding area are fused together through ultrasonic welding, so that the base and the coil holder of the utility model have a smaller joint surface during ultrasonic welding, can be fused together quickly, have lower energy consumption and higher efficiency. In particular, the welding convex part is in the shape of a rib, so that the fusion surface of the base and the coil holder is not too small, and the fusion of the joint surface is ensured to be fixed reliably.

[0019] 4. The other of the first welding area and the second welding area is provided with a welding groove, the welding convex portion enters the welding groove, and the welding convex portion and the groove bottom and / or groove wall of the welding groove are fused together through ultrasonic welding, so that the utility model can on one hand utilize the cooperation of the welding groove and the welding convex portion to pre-position the base and the coil holder, and on the other hand utilize the welding groove to accommodate the fused part of the welding convex portion.

[0020] 5. The welding convex portion and the welding groove are in interference fit before fusion, which can improve the fusion effect of the welding convex portion after ultrasonic welding, thereby further improving the fixing reliability of the base and the coil holder.

[0021] 6. The cross-sectional outer contour of the welding convex portion is in the form of a convex circular arc, so that the welding convex portion and the corresponding joint surface are rubbed faster, and instantaneous fusion joint is realized faster.

[0022] The utility model will be further described in detail in combination with the drawings and embodiments; but the electromagnetic relay of the utility model is not limited to the embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a three-dimensional structure schematic view of the electromagnetic relay of the utility model (without a shell);

[0024] Figure 2 is a three-dimensional structure schematic view of the base before ultrasonic welding;

[0025] Figure 3 is a top view of the base before ultrasonic welding;

[0026] Figure 4 is a three-dimensional structure schematic view of the coil holder before ultrasonic welding;

[0027] Figure 5 is a bottom view of the coil holder before ultrasonic welding;

[0028] Figure 6 is a bottom view of the electromagnetic relay of the utility model;

[0029] Figure 7 is Figure 6 A-A sectional view before fusion;

[0030] Figure 8 is Figure 7 the enlarged schematic view of the B part;

[0031] Figure 9 is Figure 6 A-A sectional view after fusion;

[0032] Figure 10 is Figure 9An enlarged schematic view of the middle C portion;

[0033] In the figure, 1, base, 11, first welding area; 111, welding convex part; 2, coil holder, 21, second welding area; 211, welding concave groove; 3, yoke; 4, armature; 5, core; 6, coil; 7, moving spring piece; 8, static spring piece. DETAILED DESCRIPTION

[0034] In the present utility model, the terms "first", "second" and the like are used only to distinguish similar objects, and are not used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance.

[0035] In addition, in the description of the present utility model, "a plurality of" means two or more, unless otherwise specified. "And / or" describes the relationship between the associated objects, indicating that there can be three relationships, for example, A and / or B can represent the three cases of A existing alone, A and B existing together, and B existing alone. The character " / " generally represents an "or" relationship between the front and rear associated objects.

[0036] Please see Figures 1-10 As shown in the figure, the utility model discloses an electromagnetic relay, which comprises a base 1 and a magnetic circuit part, wherein the magnetic circuit part comprises a coil holder 2, and the coil holder 2 is arranged on the base 1; the base 1 is provided with a first welding area 11, and the coil holder 2 is provided with a second welding area 21; the first welding area 11 is in contact with the second welding area 21 and is welded together through ultrasonic welding. Therefore, the base 1 and the coil holder 2 are fixed through ultrasonic welding in the utility model, so that the base 1 and the coil holder 2 are fixed reliably, thereby ensuring the consistency of product parameters, and plastic debris generated during assembly is avoided, and the product is also convenient for miniaturization design.

[0037] As a preferred mode, the first welding area 11 is provided with at least three first welding areas 11, and the three first welding areas 11 are in a triangular distribution. Correspondingly, the second welding area 21 is also provided with at least three second welding areas 21, and the second welding area 21 corresponds to the first welding area 11 one by one. In the embodiment, the first welding area 11 and the second welding area 21 are each taken as an example of three, but are not limited thereto. Therefore, the base 1 and the coil holder 2 are ultrasonically welded through the good stability of the triangular shape in the utility model, so that the cooperation of the base 1 and the coil holder 2 is more stable.

[0038] One of the first welding area 11 and the second welding area 21 is provided with at least one welding convex part 111, and the welding convex part 111 is fused together with the other of the first welding area 11 and the second welding area 21 through ultrasonic welding. In the embodiment, the first welding area 11 is taken as an example provided with the welding convex part 111, but is not limited thereto, and in other embodiments, the second welding area is provided with the welding convex part, or the first welding area and the second welding area are each provided with the welding convex part.

[0039] The welding protrusions 111 are in the form of ribs, and the cross-sectional outer profile of the welding protrusions 111 is in the form of a convex arc, specifically, in this embodiment, the cross-sectional outer profile of the welding protrusions 111 is in the form of a semicircle, but is not limited thereto. In other embodiments, the welding protrusions 111 are in the form of a convex calyx.

[0040] In this embodiment, the three first welding areas 11 are respectively provided with welding protrusions 111, and the extending directions of the welding protrusions 111 are consistent, specifically, the welding protrusions 111 respectively extend along the length direction of the base 1. As shown in FIG. 1 and FIG. 2, of the three first welding areas 11, two first welding areas 11 are arranged along the width direction of the base 1, and are respectively provided with one welding protrusion 111, and the remaining one first welding area 11 is located at one end of the base 1 in the length direction, and is provided with a plurality of welding protrusions 111, which are spaced apart along a direction perpendicular to the length direction of the welding protrusions 111, so that there is a gap between adjacent welding protrusions 111, thereby providing a flow space for the molten plastic. Figure 2 、 Figure 3 As shown in FIG. 1 and FIG. 2, of the three first welding areas 11, two first welding areas 11 are arranged along the width direction of the base 1, and are respectively provided with one welding protrusion 111, and the remaining one first welding area 11 is located at one end of the base 1 in the length direction, and is provided with a plurality of welding protrusions 111, which are spaced apart along a direction perpendicular to the length direction of the welding protrusions 111, so that there is a gap between adjacent welding protrusions 111, thereby providing a flow space for the molten plastic.

[0041] The other of the first welding area 11 and the second welding area 21 is provided with a welding recess 211, that is, the second welding area 21 is provided with a welding recess 211, and the welding protrusion 111 enters the welding recess 211, and is fused together with the bottom and / or the wall of the welding recess 211 by ultrasonic welding. On the one hand, the base 1 and the coil holder 2 can be pre-positioned by the cooperation of the welding recess 211 and the welding protrusion 111, and on the other hand, the molten part of the welding protrusion 111 can be accommodated in the welding recess 211. Specifically, the welding protrusion 111 and the bottom and / or the wall of the welding recess 211 are in an interference fit before fusion, so that the fusion effect of the welding protrusion 111 after ultrasonic welding is better.

[0042] In this embodiment, the coil holder 2 is in a vertical type, that is, the coil holder 2 is arranged at one end of the base 1 in the axial direction, and is provided with the second welding area 21. The magnetic circuit part includes the coil holder 2, the yoke 3, the armature 4, the iron core 5, and the coil 6 wound on the coil holder 2, the iron core 5 is arranged in the coil holder 2, the yoke 3 is in the form of an L-shaped, one side of the yoke 3 is fixedly connected with one end of the iron core 5, and the other side of the yoke 3 is matched with the outside of the coil holder 2; the armature 4 is arranged at the cutting edge of the other side of the yoke 3, and is located between the coil holder 2 at one end thereof in the axial direction and the base 1; the armature 4 is connected with a moving contact spring 7, and the moving contact spring 7 is provided with a moving contact; the coil holder 2 is provided with a stationary contact spring 8, and the stationary contact spring 8 is provided with a stationary contact matched with the moving contact. Therefore, the utility model forms a flip type snap relay, but the type of the relay of the utility model is not limited thereto.

[0043] In this invention, an electromagnetic relay is provided. Before ultrasonic welding of the base 1 and the coil frame 2, pressure is applied to ensure an interference fit between the welding protrusions 111 of the base 1 and the bottom of the corresponding welding grooves 211. Figure 7 , Figure 8 As shown; then, under appropriate pressure, the ultrasonic high-frequency vibrating welding head causes frictional heat to be generated at the joint surfaces of each welding protrusion 111 and the welding groove 211, resulting in instantaneous melting and bonding, as shown. Figure 9 , Figure 10 As shown, this ensures that the base 1 and the coil holder 2 are reliably fixed, guaranteeing the consistency of product parameters and preventing the generation of assembly plastic shavings, which is beneficial for miniaturized product design.

[0044] The electromagnetic relay of this utility model is identical to or can be implemented using existing technology for the parts not described herein.

[0045] The above embodiments are only used to further illustrate an electromagnetic relay of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. An electromagnetic relay, comprising a base and a magnetic circuit portion, the magnetic circuit portion including a coil holder disposed on the base; characterized in that: The base has a first welding area, and the coil frame has a second welding area. The first welding area and the second welding area are in contact and are welded together by ultrasonic waves.

2. The electromagnetic relay according to claim 1, characterized in that: The first welding area is set in at least three locations, and three of the first welding areas are arranged in a triangular pattern; the second welding area is set in at least three locations, and the second welding area corresponds one-to-one with the first welding area.

3. The electromagnetic relay according to claim 1 or 2, characterized in that: One of the first welding area and the second welding area is provided with at least one welding protrusion, which is fused together with the other of the first welding area and the second welding area by ultrasonic welding.

4. The electromagnetic relay according to claim 3, characterized in that: The first welding area and the second welding area are provided with a welding groove. The welding protrusion enters the welding groove and is fused together with the bottom and / or wall of the welding groove by ultrasonic welding.

5. The electromagnetic relay according to claim 4, characterized in that: The welding protrusion and the bottom and / or wall of the welding groove are in an interference fit before melting.

6. The electromagnetic relay according to claim 3, characterized in that: The welded protrusion is rib-shaped.

7. The electromagnetic relay according to claim 6, characterized in that: The cross-sectional outer contour of the welding protrusion is an outwardly convex arc shape.

8. The electromagnetic relay according to claim 6 or 7, characterized in that: The first welding area and the second welding area are provided in multiple locations, and the extension direction of each welding protrusion is consistent; at least one of the first welding area or the second welding area is provided with multiple welding protrusions, and the multiple welding protrusions are distributed at intervals along a direction perpendicular to the length direction of the welding protrusion.

9. The electromagnetic relay according to claim 1, characterized in that: The coil frame is placed at one end of its axial direction on the base and is provided with the second welding area.

10. The electromagnetic relay according to claim 9, characterized in that: The magnetic circuit section also includes a yoke, an armature, an iron core, and a coil wound around the coil frame. The iron core passes through the coil frame. The yoke is L-shaped, with one side of the yoke fixedly connected to one end of the iron core, and the other side of the yoke fitting to the outside of the coil frame. The armature is rotatably positioned at the knife edge on the other side of the yoke, and is located between one axial end of the coil frame and the base. A movable spring is connected to the armature, and the movable spring has a movable contact. A stationary spring is mounted on the coil frame, and the stationary spring has a stationary contact that cooperates with the movable contact.

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