Electromagnetic relay with bent coil pin

Abstract

The utility model provides an electromagnetic relay with bent coil pins, and belongs to the technical field of electromagnetic products. According to the utility model, the coil pins comprising the winding ends and the pin ends are arranged on the two sides of one end of the framework in an injection molding manner, one end of each winding end and one part of the pre-bent end of each pin end are arranged in the framework in an injection molding manner, the other part of each pre-bent end and the other end of each winding end are arranged in the base in an injection molding manner, and the winding ends and the pin ends are of an integrated structure; compared with the prior art, the coil pin has the advantages that the structure strength is higher, the problem of poor contact is avoided, meanwhile, a plurality of limiting parts are formed through the pre-bending ends, the connection strength of the coil pins is improved, the structure is more stable and reliable, the distance between the rear bending ends of every two adjacent coil pins is larger, and the insulation effect is better; and the rear bending end of the coil pin is formed by bending again after injection molding is completed, and can be used as a framework positioning structure during injection molding, so that a positioning structure does not need to be additionally arranged, and production and manufacturing are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic product technology, specifically to an electromagnetic relay with bent coil pins. Background Technology

[0002] Electromagnetic relays are typically used as circuit switching control structures. When a coil is energized, it attracts an armature, causing the armature to make corresponding changes in motion. The movement of the armature enables the connection between the moving and stationary contacts.

[0003] Currently, commercially available electromagnetic relays, such as the integrated relay disclosed in patent CN219842934U, typically include a movable component and an integrated base structure. The movable component swings relative to the integrated base structure. Furthermore, a coil is wound around the outer side of the iron core of the integrated base structure. First insulating frames are injection-molded at both ends of the iron core, and a second insulating frame is injection-molded around the coil and the first insulating frame. Several leads are simultaneously injection-molded onto the second insulating frame to form an integrated structure. In this case, the integrated base structure also includes coil terminals for electrical connection with the coil. The coil terminals include conductive sheets and coil leads connected to the conductive sheets. The coil leads protrude from the second insulating frame. The first insulating frame is injection-molded onto the iron core and conductive sheets to integrate them into a single unit. The coil leads are installed later during the injection molding of the second insulating frame and contact the conductive sheets to achieve electrical conduction. While this structure meets the usage requirements, the separation of two independent structures into a single electrical connection can lead to poor contact issues. In addition, since the second insulating frame is injection molded to wrap around the coil and the first insulating frame later, it is not only necessary to set a positioning structure for the coil lead in the injection mold, but it is also easy for the coil lead to fall off during later use, resulting in inconvenience in production and manufacturing and poor structural strength. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, the aim is to provide an electromagnetic relay with a bent coil pin. The bent coil pin has a winding end and a pin end at both ends. The winding end is directly injection molded onto the frame with the coil wound on it, and after injection molding, it is further bent to form the pin end. The pin end is injection molded with the outer base, eliminating the need for additional positioning, which facilitates manufacturing. At the same time, it also ensures the structural strength of the bent coil pin, making the structure more stable and reliable.

[0005] The specific technical solution is as follows:

[0006] An electromagnetic relay with bent coil pins includes an iron core, a coil, end injection molded parts, coil pins, a base, and several contact pins. The iron core has end injection molded parts at both ends to form a frame. The coil is wound around the iron core. One end of the coil pin is injection molded on both sides of one end of the frame. The base is wrapped around the frame with the coil. The coil pins and several contact pins are injection molded on the base. The coil pins are integrally formed, with the two ends of the coil pins being a winding end and a pin end, respectively. The winding end is integrally molded on the frame, and the end of the winding end opposite to the pin end extends outside the frame and is wound with the end of the coil wire. The pin end includes a pre-bent end and a rear-bent end. The two ends of the pre-bent end are connected to the winding end and the rear-bent end, respectively. One end of the pre-bent end is injection molded inside the frame, and the other end extends outside the frame and is integrally molded with the base. A clearance groove is provided on the outer wall of the base, and one end of the rear-bent end is bent and embedded in the clearance groove.

[0007] The aforementioned electromagnetic relay with bent coil pins includes a pre-bent end comprising a vertical portion, a horizontal portion, and a transition portion. The lower end of the vertical portion is connected to one end of the winding end located within the frame. The upper end of the vertical portion is connected to one end of the transition portion. The other end of the transition portion is connected to one end of the horizontal portion. The other end of the horizontal portion is connected to one end of the rear-bent end. Furthermore, both ends of the vertical portion are perpendicular to the winding end and the transition portion, respectively. The transition portion is perpendicular to the winding end and is horizontally arranged. The horizontal portion is arranged parallel to the winding end.

[0008] The aforementioned electromagnetic relay with a bent coil pin has a base with an inwardly sloping bottom, and the rear bent end, located at the bottom of the base, bends inward toward the base and continues to extend vertically downward.

[0009] In the aforementioned electromagnetic relay with bent coil pins, frame positioning plates are provided on both sides of the frame opposite to the end where the coil pins are located, and the two frame positioning plates are symmetrically arranged with the two coil pins.

[0010] In the aforementioned electromagnetic relay with bent coil pins, the skeleton positioning piece has the same structure as the winding end and pre-bent end of the coil pin.

[0011] In the aforementioned electromagnetic relay with bent coil pins, the skeleton positioning piece further includes a section corresponding to the end connected to the horizontal part at the rear bent end.

[0012] In the aforementioned electromagnetic relay with bent coil leads, one end of the winding extending outside the frame is integrally injection molded with the base.

[0013] In the aforementioned electromagnetic relay with a bent coil pin, the end of the winding end extending outside the frame and the rear bent end are spaced apart in the width direction of the base.

[0014] In the aforementioned electromagnetic relay with bent coil leads, a winding groove is provided at the bottom of the end of the frame where the coil leads are located.

[0015] The positive effects of the above technical solution are:

[0016] The aforementioned electromagnetic relay with bent coil pins features an integrated coil pin with a winding end and a lead end at each end, resulting in higher overall structural strength. The lead end includes a pre-bent end and a post-bent end. The winding end and the pre-bent end are integrally molded with the frame. The post-bent end is formed by further bending after the base is molded. This allows the pre-bent end and the post-bent end to serve as positioning structures for the frame during base injection molding, eliminating the need for a separate positioning structure and simplifying manufacturing. Furthermore, the bending angle between the winding end and the pre-bent end, coupled with simultaneous injection molding into the frame and base, enhances the connection strength of the coil pins, reducing the likelihood of detachment and poor contact, and resulting in a more stable and reliable structure. Attached Figure Description

[0017] Figure 1 This is a structural diagram of an embodiment of the electromagnetic relay with bent coil pins according to the present invention;

[0018] Figure 2 This is a schematic diagram of the coil leads being mounted on the frame according to a preferred embodiment of the present invention;

[0019] Figure 3 This is a structural view of the coil pins of a preferred embodiment of the present invention.

[0020] Figure 4 This is a structural diagram of the coil pin from another perspective of a preferred embodiment of the present invention;

[0021] Figure 5 This is a structural diagram of the skeleton positioning piece according to a preferred embodiment of the present invention.

[0022] In the attached diagram: 1. Iron core; 2. Coil; 3. End injection molded part; 4. Coil foot; 41. Winding end; 42. Pin end; 421. Pre-bent end; 422. Rear-bent end; 4211. Vertical part; 4212. Horizontal part; 4213. Transition part; 5. Base; 6. Contact pin; 7. Frame; 71. Winding groove; 8. Frame positioning piece; 9. Housing. Detailed Implementation

[0023] To make the technical means, creative features, objectives, and effects of this utility model easier to understand, the following embodiments are provided in conjunction with the appendix. Figure 1 To be continued Figure 5 The technical solution provided by this utility model is described in detail, but the following content is not intended to limit this utility model.

[0024] Figure 1 This is a structural diagram of an embodiment of the electromagnetic relay with bent coil pins according to the present invention; Figure 2 This is a schematic diagram of the coil leads being mounted on the frame according to a preferred embodiment of the present invention; Figure 3 This is a structural view of the coil pins of a preferred embodiment of the present invention. Figure 4 This is a structural diagram of the coil pins from another perspective, representing a preferred embodiment of the present invention. (See diagram below.) Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the electromagnetic relay with bent coil leads provided in this embodiment includes: an iron core 1, a coil 2, end injection molded parts 3, coil leads 4, a base 5, several contact leads 6, and a frame positioning piece 8. At this time, end injection molded parts 3 are injection molded at both ends of the iron core 1 to form a frame 7, and the coil 2 is wound around the iron core 1 to form an electromagnetic structure capable of generating a magnetic field. Furthermore, one end of the coil lead 4 is injection molded on both sides of one end of the frame 7, allowing the coil lead 4 to be fixed by the frame 7 and form an integrated structure, improving the connection stability of the coil lead 4. In addition, the wire ends of the coil 2 are wound around the two coil leads 4 respectively, providing conditions for subsequent external power supply to the coil 2. Furthermore, the base 5 is wrapped around the frame 7 containing the coil 2, achieving an integrated external arrangement of the product through the base 5, which not only meets the requirements for external positioning and protection but also ensures a more stable overall product structure. Meanwhile, the coil pin 4 and several contact pins 6 are injection molded onto the base 5, creating injection-molded connection points between the coil pin 4 and the frame 7 and base 5. This further enhances the connection strength and stability of the coil pin 4, preventing it from easily detaching. Additionally, the contact pins 6 facilitate the connection of the control circuit, simplifying wiring.

[0025] Specifically, coil pin 4 is a one-piece structure, which makes the coil pin 4 itself highly structurally strong, less prone to detachment after injection molding, and ensures the best circuit conductivity, avoiding contact problems. At this time, the two ends of coil pin 4 are a winding end 41 and a lead end 42, respectively, making the two ends of coil pin 4 distinct and meeting different functional requirements. In addition, the winding end 41 is integrally injection molded onto the frame 7, realizing the injection molding of coil pin 4 onto the frame 7, improving the connection strength of coil pin 4. Furthermore, the end of winding end 41 opposite to lead end 42 extends outside the frame 7 and is wrapped with the wire end of coil 2. That is, while the winding end 41 is fixed to the frame 7 by injection molding, its extended end also facilitates the subsequent winding operation of the wire end of coil 2. In addition, the lead end 42 of the coil lead 4 includes a pre-bent end 421 and a rear-bent end 422. The two ends of the pre-bent end 421 are connected to the winding end 41 and the rear-bent end 422 respectively. That is, the pre-bent end 421 serves as an intermediate connection structure between the winding end 41 and the rear-bent end 422. This pre-bent end 421 component exists between the winding end 41 and the rear-bent end 422. The multiple bends of the pre-bent end 421 can provide more bending angles, which provides conditions for improving the connection strength between the coil lead 4 and the frame 7 and the base 5. In addition, the pre-bent end 421 also increases the spacing between the coil leads 4 on both sides of the frame 7, resulting in better insulation performance. It also provides bending allowance and space for the subsequent bending of the rear-bent end 422, which is convenient for processing. Furthermore, one end of the pre-bent end 421 is injection-molded into the frame 7, while the other end of the pre-bent end 421 extends outside the frame 7 and is integrally injection-molded with the base 5. This makes the pre-bent end 421 integral with both the frame 7 and the base 5, thereby improving the overall structure, resulting in higher structural strength, reliability, and stability. Moreover, the rear-bent end 422 is formed by bending the base 5 after injection molding. This means that when the base 5 is injection-molded outside the frame 7, since the winding end 41 and the pre-bent end 421 are both injection-molded onto the frame 7, the frame 7 can be positioned using the winding end 41, the pre-bent end 421, and the rear-bent end 422, eliminating the need for additional positioning structures and simplifying manufacturing. In addition, a clearance groove is provided on the outer wall of the base 5. At the same time, one end of the rear bent end 422 is bent and embedded in the clearance groove. That is, the clearance groove on the base 5 provides a space for the rear bent end 422 of the coil pin 4, which provides a condition for ensuring the flatness of the outer surface of the base 5. This facilitates the subsequent installation of the outer shell 9 on the base 5. In addition, the clearance groove also allows the coil pin 4 to be hidden and installed in the base 5, which increases the insulation between the coil pin 4 and other contact pins 6. The structural design is more reasonable.

[0026] More specifically, the pre-bent end 421 of the lead end 42 includes a vertical portion 4211, a horizontal portion 4212, and a transition portion 4213. The vertical portion 4211, the horizontal portion 4212, and the transition portion 4213 are obtained by bending the same strip of material multiple times. At this time, the lower end of the vertical portion 4211 is connected to one end of the winding end 41 located in the frame 7, that is, the vertical portion 4211 is injection molded into the frame 7. Furthermore, the upper end of the vertical portion 4211 is connected to one end of the transition portion 4213, so that the transition portion 4213 is also injection molded into the frame 7. In addition, the other end of the transition portion 4213 is connected to one end of the horizontal portion 4212, and the other end of the horizontal portion 4212 is connected to one end of the rear-bent end 422, so that the coil lead 4 has at least three bending points in the frame 7. Furthermore, the two ends of the vertical portion 4211 are perpendicular to the winding end 41 and the transition portion 4213, respectively. The transition portion 4213 is perpendicular to the winding end 41 and is horizontally arranged. The horizontal portion 4212 is parallel to the winding end 41. This creates a gap between the winding end 41 and the horizontal portion 4212 in both the horizontal and vertical directions, placing them in different spaces. This increases the number of limiting points between the coil feet 4 and the frame 7, further improving the installation stability and reliability of the coil feet 4 and effectively preventing accidental detachment during use. In addition, the pre-bent end 421 also increases the spacing between the two coil feet 4, resulting in better insulation.

[0027] More specifically, the bottom of the base 5 is arranged in an inward-sloping shape, that is, the bottom of the base 5 gradually shrinks. At this time, the rear bend end 422, located at the bottom of the base 5, is bent inward towards the inside of the base 5 and then continues to extend vertically downward. This allows the rear bend end 422 to shrink inward in sync with the shrinking bottom of the base 5, which facilitates the wiring of the subsequent pin end 42, avoids the expansion of the overall volume, and makes the structural design more reasonable.

[0028] Figure 5 This is a structural diagram of the skeleton positioning piece according to a preferred embodiment of the present invention. Figure 1 , Figure 2 as well as Figure 5 As shown, two skeleton positioning pieces 8 are provided on both sides of the end of the skeleton 7 opposite to the end where the coil foot 4 is provided. The two skeleton positioning pieces 8 are symmetrically arranged with the two coil foot 4. That is, the two ends of the skeleton 7 are respectively connected by the coil foot 4 and the skeleton positioning pieces 8, so that when the skeleton 7 needs to be accurately positioned in the injection mold by the base 5 on the outside of the injection molding, it can be accurately positioned by the coil foot 4 and the fixed positioning pieces, thereby ensuring product quality.

[0029] More specifically, the skeleton positioning piece 8 located at the other end of the skeleton 7 has the same structure as the winding end 41 and pre-bent end 421 of the coil foot 4. That is, when the skeleton positioning piece 8 is used as the positioning structure of the skeleton 7, its positioning effect is exactly the same as that of the coil foot 4, so that the two ends of the skeleton 7 can be positioned synchronously and accurately, resulting in a better positioning effect. At the same time, the skeleton positioning piece 8 can also be installed stably and reliably on the skeleton 7 without loosening or falling off, ensuring the effectiveness of subsequent positioning.

[0030] More specifically, the skeleton positioning piece 8 also includes a section at the end corresponding to the connection between the rear bent end 422 and the horizontal part 4212. That is, compared with the coil pin 4, the skeleton positioning piece 8 only lacks the section where the rear bent end 422 extends downward to the base 5. This allows the fixing positioning piece to be manufactured and installed using the same processing technology as the coil pin 4, except that it does not require wiring. There is no need to develop additional equipment for production and installation, thus reducing costs.

[0031] More specifically, the end of the winding end 41 extending outside the frame 7 is integrally molded with the base 5 by injection molding. That is, the winding end 41 and the wound wire end are completely wrapped by the injection molding process of the base 5, which can not only improve the connection stability and prevent the problem of falling off, but also achieve external insulation, waterproofing and other external protection, thus improving safety.

[0032] More specifically, the end of the winding end 41 extending outside the skeleton 7 and the rear bent end 422 are spaced apart in the width direction of the base 5, so that the base 5 can enter the gap between the two during injection molding, thereby completely covering the end of the winding end 41 with the wire end wrapped around it, further improving the protective effect.

[0033] More specifically, a winding groove 71 is provided at the bottom of the end of the skeleton 7 where the coil foot 4 is located, so that when the wire end of the coil 2 is wound around the winding end 41 of the coil foot 4 on its side, the wire can be routed through the winding groove 71, realizing a hidden arrangement of guidance, which facilitates the subsequent injection molding of the outer base 5.

[0034] The electromagnetic relay with bent coil leads provided in this embodiment includes an iron core 1, a coil 2, an end injection molded part 3, coil leads 4, a base 5, and several contact leads 6. Coil leads 4 are injection molded on both sides of one end of the frame 7 containing the iron core 1 and the coil 2. Each coil lead 4 includes a winding end 41 and a lead end 42. One end of the winding end 41 and a portion of the pre-bent end 421 of the lead end 42 are injection molded into the frame 7. The other portion of the pre-bent end 421 and the other end of the winding end 41 are injection molded into the outer base 5. After injection molding, the rear bend end 422 of the lead end 42 is further bent. The coil is bent to form the pins for external wiring, and the winding end 41 and the pin end 42 are integrated into one structure, resulting in higher structural strength and eliminating contact problems. At the same time, multiple bending of the pre-bent end forms multiple limiting parts, which improves the connection strength of the coil pin 4 within the frame 7 and the base 5, making the structure more stable and reliable. It also makes the spacing between the back-bent ends of two adjacent coil pins 4 larger, resulting in better insulation. In addition, the back-bent end 422 of the coil pin 4 is formed by bending after injection molding, and can be used as a positioning structure of the frame 7 during injection molding, eliminating the need for additional positioning structures and simplifying manufacturing.

[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electromagnetic relay with bent coil leads, comprising an iron core, a coil, end-molded parts, coil leads, a base, and a plurality of contact leads, wherein the iron core has end-molded parts at both ends to form a frame, the coil is wound around the iron core, and one end of the coil lead is molded on both sides of one end of the frame, the base is wrapped around the frame containing the coil, and the coil lead and the plurality of contact leads are all molded on the base, characterized in that, The coil lead is an integral structure, with a winding end and a pin end at both ends. The winding end is integrally injection molded onto the frame, and the end of the winding end opposite to the pin end extends out of the frame and is wound with the end of the coil wire. The pin end includes a pre-bent end and a rear-bent end. The two ends of the pre-bent end are respectively connected to the winding end and the rear-bent end. One end of the pre-bent end is injection molded inside the frame, and the other end extends out of the frame and is integrally injection molded with the base. An avoidance groove is provided on the outer side wall of the base, and one end of the rear-bent end is bent and embedded in the avoidance groove.

2. The electromagnetic relay with bent coil leads according to claim 1, characterized in that, The pre-bent end includes a vertical part, a horizontal part, and a transition part. The lower end of the vertical part is connected to one end of the winding end located within the skeleton. The upper end of the vertical part is connected to one end of the transition part. The other end of the transition part is connected to one end of the horizontal part. The other end of the horizontal part is connected to one end of the rear-bent end. Furthermore, both ends of the vertical part are perpendicular to the winding end and the transition part, respectively. The transition part is perpendicular to the winding end and is arranged horizontally. The horizontal part is arranged parallel to the winding end.

3. The electromagnetic relay with bent coil leads according to claim 1, characterized in that, The bottom of the base is arranged in an inward slope, and the rear bent end, located at the bottom of the base, bends inward toward the base and continues to extend vertically downward.

4. The electromagnetic relay with bent coil leads according to claim 2, characterized in that, The skeleton is provided with skeleton positioning pieces on both sides of the end opposite to the coil foot, and the two skeleton positioning pieces are symmetrically arranged with the two coil feet.

5. The electromagnetic relay with bent coil leads according to claim 4, characterized in that, The skeleton positioning piece has the same structure as the winding end and the pre-bent end of the coil foot.

6. The electromagnetic relay with bent coil leads according to claim 5, characterized in that, The skeleton positioning piece also includes a section corresponding to the end where the rear bent end connects to the horizontal part.

7. The electromagnetic relay with bent coil leads according to claim 1, characterized in that, The end of the winding end that extends outside the skeleton is integrally injection molded with the base.

8. The electromagnetic relay with bent coil leads according to claim 1, characterized in that, The end of the winding end extending outside the skeleton and the rear bending end are spaced apart in the width direction of the base.

9. The electromagnetic relay with bent coil leads according to claim 1, characterized in that, The bottom of the end of the frame where the coil foot is located has a winding groove.

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