Movable spring and yoke connecting structure and electromagnetic relay

Abstract

The utility model discloses a movable spring and yoke connection structure and an electromagnetic relay, the movable spring and yoke connection structure comprises a movable spring and a yoke, the movable spring comprises a main body part and a fixed part used for connecting the yoke, and a bending line is arranged between the fixed part and the main body part; a pre-positioning structure is arranged between the fixing part and the yoke; the fixing part is welded and fixed with the yoke, and at least part of the welding part of the fixing part and the yoke is not located between the pre-positioning structure and the bending line. According to the utility model, the welding part of the fixed part of the movable spring and the yoke is at least partially not positioned between the pre-positioning structure and the bending line, so that the stress of the movable spring can be shared by utilizing the pre-positioning structure, and the stress of the movable spring transferred to the welding part of the fixed part and the yoke is smaller; therefore, the probability that the welding part of the fixed part and the yoke is broken due to stress concentration can be reduced, and the mechanical strength of the movable spring can be improved.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, and in particular to a connection structure between a moving spring and a yoke, and an electromagnetic relay. Background Technology

[0002] In a current type of snap-fit ​​relay, the moving spring is bent and roughly L-shaped. One side of the moving spring is riveted to the yoke, and the other side is riveted to the armature. A moving contact is provided, connecting the moving spring and the armature to form a moving spring-armature assembly. However, riveting the moving spring to the yoke can cause deformation and internal stress in the moving spring and / or the yoke, affecting the mechanical parameters of the product. To address this, some relays weld the moving spring to the yoke. However, the welded area is close to the bending line of the moving spring, where there is significant stress. This makes the weld point prone to damaging the structure of the moving spring material itself, causing it to fall below the tensile strength of the moving spring. This can lead to breakage and failure in the later stages of mechanical durability testing, resulting in poor product quality. Utility Model Content

[0003] This utility model addresses the technical problems existing in the prior art by providing a connection structure between the moving spring and the yoke, as well as an electromagnetic relay. Through structural improvements, it not only achieves a stable connection between the moving spring and the yoke but also greatly improves the mechanical durability of the product.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a connection structure between a moving spring and a yoke and an electromagnetic relay, including a moving spring and a yoke. The moving spring includes a main body and a fixing part for connecting the yoke. A bending line is provided between the fixing part and the main body. A pre-positioning structure is provided between the fixing part and the yoke. The feature is that the fixing part is welded to the yoke, and the part where the fixing part is welded to the yoke is at least partially not located between the pre-positioning structure and the bending line.

[0005] Furthermore, the portions where the fixing part is welded to the yoke are not located between the pre-positioning structure and the bending line, or the area of ​​the portion where the fixing part is welded to the yoke outside the area between the pre-positioning structure and the bending line is greater than or equal to 2 / 3 of the area of ​​the portion where the fixing part is welded to the yoke.

[0006] Furthermore, the portion where the fixing part is welded to the yoke is at least partially located on the side of the prepositioning structure away from the bending line.

[0007] Furthermore, the portion where the fixing part is welded to the yoke is at least partially located on at least one side and / or in the middle of the direction parallel to the bending line of the prepositioning structure.

[0008] Furthermore, the fixing part and the yoke are laser welded to form a fused structure, the fused structure including multiple fused parts, which are arranged at intervals along a direction parallel or perpendicular to the bending line.

[0009] Furthermore, the molten portion is provided as at least three, and the molten portion is in the form of dots or lines.

[0010] Furthermore, the pre-positioning structure includes a pair of positioning protrusions and positioning holes, the positioning protrusions passing through the positioning holes and the two being tightly fitted; one of the fixing part and the yoke is provided with the positioning protrusion, and the other of the fixing part and the yoke is provided with the positioning hole.

[0011] Furthermore, the positioning holes are provided in multiple locations, and the multiple positioning holes are arranged at intervals along a direction parallel to the bending line. The positioning protrusions are provided in multiple locations, and the multiple positioning protrusions correspond one-to-one with the multiple positioning holes.

[0012] This utility model also provides an electromagnetic relay, including the connection structure between the moving spring and the yoke as described above.

[0013] Furthermore, it also includes a coil frame with a coil wound around it and an armature. An iron core is set in the coil frame. The yoke is L-shaped, with one side fixedly connected to one end of the iron core and the other side having the prepositioning structure between it and the fixing part of the moving spring, and welded and fixed to the fixing part of the moving spring. The armature is oscillating at the knife edge set on the other side of the yoke. The main body of the moving spring is connected to the armature and has a moving contact. The moving spring lead-out foot is set on the yoke.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This utility model welds the fixed part of the moving spring to the yoke, which avoids the deformation of the moving spring and yoke caused by riveting. Furthermore, the part where the fixed part of the moving spring is welded to the yoke is at least partially not located between the pre-positioning structure and the bending line. This allows the utility model to share the stress of the moving spring using the pre-positioning structure between the moving spring and the yoke, resulting in a smaller stress on the part where the fixed part is welded to the yoke. This reduces the probability of breakage due to stress concentration at the welded part, thereby improving the mechanical strength of the moving spring.

[0016] 2. The parts where the fixing part is welded to the yoke are not located between the pre-positioning structure and the bending line, or the area of ​​the part where the fixing part is welded to the yoke outside the pre-positioning structure and the bending line is greater than or equal to 2 / 3 of the area of ​​the part where the fixing part is welded to the yoke. This allows the present invention to use the pre-positioning structure to share most of the stress of the moving spring, so that the part where the fixing part is welded to the yoke is only subjected to a small amount of stress. The part where the fixing part is welded to the yoke will not break due to stress concentration, thereby further improving the mechanical strength of the moving spring.

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the connection structure between the moving spring and the yoke and the electromagnetic relay of the present invention are not limited to the embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a utility model, as shown in the embodiment. Figure 1 ;

[0019] Figure 2 This is Example 1 Figure 1 An enlarged schematic diagram of part A in the middle;

[0020] Figure 3 This is Example 1 Figure 1 The main view;

[0021] Figure 4 This is a three-dimensional structural schematic diagram of the movable spring of this utility model, as shown in the embodiment.

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of a utility model, as shown in the embodiment. Figure 2 (Excluding the moving spring);

[0023] Figure 6 This is the front view of the utility model in Embodiment 2;

[0024] Figure 7 This is the front view of the utility model in Embodiment 3;

[0025] In the diagram, 1 is the moving spring, 11 is the main body, 12 is the fixing part, 121 is the positioning hole, 122 is the bending edge, 13 is the bending line, 14 is the moving contact, 2 is the yoke, 21 is the positioning protrusion, 3 is the molten part, 4 is the coil frame, 5 is the coil, 6 is the armature, and 7 is the iron core. Detailed Implementation

[0026] In the description of this utility model, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0027] Example 1

[0028] Please see Figures 1-5 As shown, this utility model discloses a connection structure between a movable spring and a yoke, comprising a movable spring 1 and a yoke 2. The movable spring 1 includes a main body 11 and a fixing part 12 for connecting the yoke 2. A bending line 13 is provided between the fixing part 12 and the main body 11. The fixing part 12 is attached to the surface of the yoke 2, and a pre-positioning structure is provided between the fixing part 12 and the yoke 2 to pre-position them before welding. The fixing part 12 is welded to the yoke 2, and at least partially, the welded portion of the fixing part 12 and the yoke 2 is not located between the pre-positioning structure and the bending line 13.

[0029] As a preferred embodiment, the portions where the fixing part 12 is welded to the yoke 2 are not located between the pre-positioning structure and the bending line 13, or the area of ​​the portion of the fixing part 12 welded to the yoke 2 outside the pre-positioning structure and the bending line is greater than or equal to 2 / 3 of the area of ​​the portion where the fixing part is welded to the yoke 2. Specifically, in this embodiment, the portions where the fixing part 12 is welded to the yoke 2 are not located between the pre-positioning structure and the bending line 13, and the portions where the fixing part 12 is welded to the yoke 2 are all located on the side of the pre-positioning structure away from the bending line 13. However, this is not a limitation. In other embodiments, the portions where the fixing part 12 is welded to the yoke 3 are partially located on the side of the pre-positioning structure away from the bending line, while the remaining portions are located on at least one side and / or in the middle of the direction parallel to the pre-positioning structure and the bending line 13.

[0030] The aforementioned fixing part 12 and yoke 2 are fixedly connected by laser welding, and the welded portion of the fixing part 12 and yoke 2 forms a molten structure. The aforementioned pre-positioning structure is located between the bending line 13 and the molten structure, that is, the molten structure is located on the side of the pre-positioning structure away from the bending line 13. The molten structure includes multiple molten parts 3, which are spaced apart along a direction parallel to the bending line 13, and each molten part 3 is dot-shaped, but not limited to this. In other embodiments, each molten part 3 is line-shaped; in other embodiments, the multiple molten parts are spaced apart along a direction perpendicular to the bending line 13. Specifically, the number of molten parts 3 is at least three, preferably three, so that the laser welding area is small, the damage to the moving spring 1 is small, and the mechanical strength of the moving spring 1 can be improved while satisfying the current carrying reliability.

[0031] The aforementioned pre-positioning structure includes a pair of positioning protrusions 21 and positioning holes 121, with the positioning protrusions 21 passing through the positioning holes 121 and the two being tightly fitted together. One of the fixing part 12 and the yoke 2 is provided with a positioning protrusion 21, and the other of the fixing part 12 and the yoke 2 is provided with a positioning hole 121. Specifically, in this embodiment, the positioning hole 121 is provided on the movable spring 1, and the positioning protrusion 21 is provided on the yoke 2, but it is not limited to this. In other embodiments, the positioning hole is provided on the yoke, and the positioning protrusion is provided on the movable spring.

[0032] Furthermore, multiple positioning holes 121 are provided, and the multiple positioning holes 121 are arranged at intervals along a direction parallel to the bending line 13. Multiple positioning protrusions 21 are provided, and the multiple positioning protrusions 21 correspond one-to-one with the multiple positioning holes 121. Specifically, in this embodiment, two positioning holes 121 and two positioning protrusions 21 are used as examples, but it is not limited to this.

[0033] like Figure 2 , Figure 4 As shown, a plurality of bent edges 122 are provided on one side of the positioning hole 121 at intervals along its circumference. The plurality of bent edges 122 respectively press against the outer surface of the positioning protrusion 21 to form anti-retraction barbs for preventing the positioning hole 121 from disengaging from the positioning protrusion 21. In this embodiment, the number of bent edges 122 is three as an example, but is not limited to this. In other embodiments, the positioning protrusion 21 and the positioning hole 121 are interference-fitted.

[0034] When the relay is engaged and disengaged, the moving spring 1 will generate stress. Because the moving spring 1 and the yoke 2 are engaged through a pre-positioning structure, and the part where the fixing part 12 is welded to the yoke 2 is not entirely or mostly located between the pre-positioning structure and the bending line 13, this utility model can utilize the pre-positioning structure to distribute most of the stress of the moving spring 1. As a result, only a small portion of the stress is transferred to the part where the fixing part 12 is welded to the yoke 2. Therefore, the part where the fixing part 12 is welded to the yoke 2 will not break due to stress concentration, thereby greatly improving the mechanical strength of the moving spring.

[0035] Example 2

[0036] The present invention provides a connection structure between a moving spring and a yoke, which differs from the first embodiment described above in that: the portion where the fixing part 12 is welded to the yoke 2 is partially located between the pre-positioning structure and the bending line 13, partially located on the side of the pre-positioning structure away from the bending line 13, and the remaining portion is located on at least one side and / or in the middle of the direction parallel to the pre-positioning structure and the bending line 13. Specifically, taking the formation of three molten portions 3 by laser welding of the fixing part 12 and the yoke 2 as an example: the three molten portions 3 are arranged at intervals along a direction perpendicular to the bending line 13, with one molten portion 3 located between the pre-positioning structure and the bending line 13, one molten portion 3 located on the side of the pre-positioning structure away from the bending line 13, and the remaining one located in the middle position in the direction parallel to the pre-positioning structure and the bending line 13. Figure 6 As shown. In other embodiments, a plurality of molten portions are arranged at intervals along a direction perpendicular to the bending line 13, and among the plurality of molten portions, a portion is located on the side of the prepositioning structure away from the bending line 13, while the remaining portions are located on at least one side and / or in the middle of the direction of the prepositioning structure parallel to the bending line 13.

[0037] Example 3

[0038] The present invention provides a connection structure between a moving spring and a yoke, which differs from any of the above embodiments in that the portion where the fixing part 12 is welded to the yoke 2 is located on at least one side and / or in the middle of a direction parallel to the pre-positioning structure and the bending line 13. Specifically, taking the formation of three molten portions 3 by laser welding of the fixing part 12 and the yoke 2 as an example: the three molten portions 3 are arranged at intervals along a direction parallel to the bending line 13, with one molten portion 3 located on one side of the direction parallel to the pre-positioning structure and the bending line 13, one molten portion 3 located on the other side of the direction parallel to the pre-positioning structure and the bending line 13, and the remaining molten portion 3 located in the middle position of the direction parallel to the pre-positioning structure and the bending line 13. Figure 7 As shown.

[0039] Example 4

[0040] Please see Figures 1-7 As shown, this utility model discloses an electromagnetic relay comprising the moving spring and yoke connection structure described in any of the above embodiments. The utility model also includes a coil frame 4 with a coil 5 wound around it, and an armature 6. An iron core 7 is disposed within the coil frame 4. The yoke 2 is L-shaped, with one side fixedly connected to one end of the iron core 7, and the other side having a positioning protrusion 21, which is laser-welded to the fixing part 12 of the moving spring 1. The armature 6 is oscillatingly positioned at a knife-edge on the other side of the yoke 2. The main body 11 of the moving spring 1 is connected to the armature 6 and has a moving contact 14; the yoke 2 has a moving spring lead-out foot (not shown in the figure).

[0041] The present invention relates to a connection structure between a moving spring and a yoke, and an electromagnetic relay. The parts not described herein are the same as or can be implemented using existing technologies.

[0042] The above embodiments are only used to further illustrate a connection structure between a moving spring and a yoke and an electromagnetic relay of the present invention. However, 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. A connection structure between a movable spring and a yoke, comprising a movable spring and a yoke, the movable spring including a main body and a fixing part for connecting the yoke, a bending line being provided between the fixing part and the main body; a pre-positioning structure being provided between the fixing part and the yoke; characterized in that: The fixing part is welded to the yoke, and the part where the fixing part is welded to the yoke is at least partially not located between the prepositioning structure and the bending line.

2. The connection structure between the moving spring and the yoke according to claim 1, characterized in that: The portions where the fixing part is welded to the yoke are not located between the pre-positioning structure and the bending line, or the area of ​​the portion of the fixing part that is welded to the yoke outside the area between the pre-positioning structure and the bending line is greater than or equal to 2 / 3 of the area of ​​the portion where the fixing part is welded to the yoke.

3. The connection structure between the moving spring and the yoke according to claim 1 or 2, characterized in that: The portion where the fixing part is welded to the yoke is at least partially located on the side of the prepositioning structure away from the bending line.

4. The connection structure between the moving spring and the yoke according to claim 1 or 2, characterized in that: The portion where the fixing part is welded to the yoke is at least partially located on at least one side and / or in the middle of the direction parallel to the bending line of the prepositioning structure.

5. The connection structure between the moving spring and the yoke according to claim 1 or 2, characterized in that: The fixing part and the yoke are laser welded to form a fused structure. The fused structure includes multiple fused parts, which are arranged at intervals along a direction parallel or perpendicular to the bending line.

6. The connection structure between the moving spring and the yoke according to claim 5, characterized in that: The molten portion is provided as at least three, and the molten portion is in the form of dots or lines.

7. The connection structure between the moving spring and the yoke according to claim 1, characterized in that: The pre-positioning structure includes a pair of positioning protrusions and positioning holes, the positioning protrusions passing through the positioning holes and the two being tightly fitted; one of the fixing part and the yoke is provided with the positioning protrusion, and the other of the fixing part and the yoke is provided with the positioning hole.

8. The connection structure between the moving spring and the yoke according to claim 7, characterized in that: The positioning holes are provided in multiple ways, and the multiple positioning holes are arranged at intervals along a direction parallel to the bending line. The positioning protrusions are provided in multiple ways, and the multiple positioning protrusions correspond one-to-one with the multiple positioning holes.

9. An electromagnetic relay, characterized in that: It includes the connection structure between the moving spring and the yoke as described in any one of claims 1-8.

10. The electromagnetic relay according to claim 9, characterized in that: It also includes a coil frame with a coil wound around it and an armature. An iron core is set in the coil frame. The yoke is L-shaped, with one side fixedly connected to one end of the iron core and the other side having the prepositioning structure between it and the fixing part of the moving spring, and is welded and fixed to the fixing part of the moving spring. The armature is oscillating at the knife edge set on the other side of the yoke. The main body of the moving spring is connected to the armature and has a moving contact. The moving spring lead-out foot is set on the yoke.

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