Coil structure and relay

Abstract

The utility model discloses a coil structure and a relay, the coil structure comprises a coil rack and a coil leading-out end integrated with the coil rack through injection molding, the coil leading-out end leads out a coil end portion on the coil rack to facilitate connection, and the coil leading-out end is integrated with the coil rack through an integrated injection molding technology. The process of inserting the coil soldering lug is effectively reduced, and the production efficiency of the coil is improved.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, specifically to a coil structure and a relay. Background Technology

[0002] As attached Figure 6 As shown, a prior art coil structure has a coil frame 1' with several slots, and coil solder pieces 2' for connecting to the beginning and end of the coil are inserted and fixed in the slots of the coil frame 1'. During the production process, the coil solder pieces 2' need to be inserted into the corresponding slots on the coil frame 1' one by one. On the one hand, the assembly process is not easy and inefficient. On the other hand, the insertion process may also scrape the inner wall of the slot of the coil frame 1' and generate plastic debris. If the plastic debris is not cleaned up, it may fall into the contact part during the use of the relay, thereby affecting the contact reliability of the contact part. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a coil structure and a relay. By using a coil lead-out end integrally injection molded with the coil frame, the coil end on the coil frame is led out for easy connection, and the process of inserting and soldering coil pieces is reduced, while increasing the winding space.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0005] A coil structure includes a coil frame and coil leads integrally injection molded with the coil frame.

[0006] Furthermore, the coil frame includes a hollow column and a first side plate and a second side plate located at both ends of the hollow column. The coil lead-out end is provided with a vertical through-passage channel that connects to the second side plate for threading.

[0007] Furthermore, the through holes on the second side plate open laterally towards the outer edge of the second side plate, thereby forming a clearance through groove.

[0008] Furthermore, the clearance groove is U-shaped or V-shaped in the transverse direction.

[0009] Furthermore, a stepped clearance groove corresponding to the clearance through groove is provided on the inner end of the second side plate.

[0010] Furthermore, the cross-section of the step avoidance groove has a fan-shaped structure.

[0011] Furthermore, a winding groove is provided on the outer periphery of the coil lead-out end on the side away from the second side plate for tinning and fixing the coil winding through the wire passage.

[0012] Furthermore, the lower wall of the winding groove has a socket or slot for the coil to pass through.

[0013] Furthermore, the coil leads are made of conductive metal.

[0014] Based on the same inventive concept, this utility model also provides a relay, including the above-described coil structure.

[0015] The above technical solution has the following advantages or beneficial effects:

[0016] In the coil structure described in this utility model, the coil on the coil frame is led out through the coil lead-out end, which is integrally injection molded with the coil frame, to facilitate connection and reduce the process of inserting coil soldering pieces; and the coil is led out through the wire passage, saving winding space and making it suitable for relays with limited space. In addition, the coil of this structure can be directly connected to an external power source without the need to add other lead-out ends for conversion, making the structure simpler. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the coil structure according to an embodiment of the present invention.

[0018] Figure 2 This is a side view of the coil structure according to an embodiment of the present invention.

[0019] Figure 3 yes Figure 2 AA section view in the image.

[0020] Figure 4 This is a front view of the coil structure according to an embodiment of the present invention.

[0021] Figure 5 yes Figure 4 BB section view in the middle.

[0022] Figure 6 It is a coil frame structure based on existing technology.

[0023] Labeling explanation: 1. Coil frame, 11. Hollow column, 12. First side plate, 13. Second side plate, 131. Clearance slot, 132. Step clearance slot, 2. Coil lead-out end, 21. Wire passage, 22. Winding slot, 23. Slot. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Please refer to the appendix. Figure 1 To be continued Figure 5 One embodiment of this utility model provides a coil structure, including a coil frame 1 and a coil lead-out end 2 integrally injection molded with the coil frame 1. It can be understood that in this embodiment, the coil end on the coil frame 1 is led out through the metal coil lead-out end 2 for easy connection, and the coil lead-out end 2 is integrally connected with the coil frame 1 through the integral injection molding process, which effectively reduces the terminal insertion process and helps to improve the production efficiency of the coil.

[0027] Please refer to the appendix. Figure 1 To be continued Figure 3 In one preferred embodiment, the coil frame 1 includes a hollow column 11 and a first side plate 12 and a second side plate 13 located at both ends of the hollow column 11. The coil lead-out end 2 is provided with a vertical through hole that connects to the second side plate 13, so as to allow the coil start and end points on the coil frame 1 to be led out through a wire passage 21. By leading out the start / end points of the coil through the wire passage 21, the wire threading method is changed, saving winding space, making the structure compact, easy to arrange, and suitable for relays with limited space. It is understood that in this embodiment, the wire passage 21 is coaxially arranged with the through hole, and the coil frame 1 has at least one integrally injection molded pair of correspondingly arranged coil lead-out ends 2. One coil lead-out end 2 leads out the start point of the coil, and the other coil lead-out end 2 leads out the end point of the coil. The start / end points of the coils led out through the coil lead-out ends 2 are fixed with tin by the winding. Preferably, the two coil lead-out ends 2 are positioned 180° opposite each other on the second side plate 13.

[0028] Please refer to the appendix. Figure 5 In one preferred embodiment, the through hole on the second side plate 13 is laterally opened towards the outer edge of the second side plate 13, thereby forming a clearance groove 131. After the coil is wound on the coil holder 1, its end is inserted into the threading channel 21 through the clearance groove 131 to avoid interference between the coil and the second side plate 13, which would prevent the end of the coil from being inserted into the threading channel 21 or cause the end of the coil to rub against the coil holder 1, resulting in damage to the varnish film and short circuit.

[0029] Please refer to the appendix. Figure 5In one preferred embodiment, the clearance groove 131 is U-shaped or V-shaped in the lateral direction. This facilitates the extraction of the mold slider from the side during one-piece injection molding, solving the problem of undercutting during injection molding. Those skilled in the art should understand that in other embodiments, the shape of the clearance groove 131 is not limited to the specific implementation disclosed in this embodiment, and can also be other polygons.

[0030] Please refer to the appendix. Figure 5 In one preferred embodiment, a stepped clearance groove 132 corresponding to the clearance groove 131 is provided on the inner end of the second side plate 13, which facilitates wire threading after winding and avoids short circuits between turns due to enamel film damage in the coil. Preferably, the recessed depth is greater than the diameter of the enameled wire to facilitate wire threading. Preferably, the groove wall of the clearance groove 131 and the groove wall of the stepped clearance groove 132 smoothly transition to avoid enamel film damage caused by friction between the enameled wire and the coil frame 1.

[0031] Please refer to the appendix. Figure 5 In one preferred embodiment, the cross-section of the clearance groove 132 is fan-shaped, forming a large clearance space, which further prevents the enameled wire from being scratched, improves the inter-turn withstand voltage performance of the coil, and reduces the risk of coil short circuit.

[0032] Please refer to the appendix. Figure 2 To be continued Figure 4 In one preferred embodiment, the coil lead-out end 2 has a winding groove 22 on its outer periphery away from the second side plate 13 for tinning and fixing the coil winding through the threading channel 21. After the beginning / end of the coil passes through the threading channel 21, it is wound and tinned in the winding groove 22. This arrangement reduces the space occupied. Preferably, the lower wall of the winding groove 22 has a hole or slot 23 for the beginning / end of the coil to pass through, so that the beginning / end of the coil can reach the winding groove 22 for tinning and fixing.

[0033] One embodiment of this utility model also provides a relay, including the coil structure described in the above embodiment.

[0034] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A coil structure comprising a coil former (1), characterized by: The coil lead-out end (2) is integrally injection molded with the coil support (1); The coil support (1) comprises a hollow column (11) and a first side plate (12) and a second side plate (13) arranged at two ends of the hollow column (11), and the coil lead-out end (2) is provided with a threading channel (21) vertically penetrating through and communicating with the second side plate (13) for threading. The through hole on the second side plate (13) is transversely open towards the outer edge of the second side plate (13) to form a clearance slot (131).

2. The coil structure of claim 1, wherein: The clearance slot (131) is U-shaped or V-shaped in the transverse direction.

3. The coil structure of claim 1, wherein: A stepped clearance groove (132) corresponding to the clearance slot (131) is arranged on the inner side end of the second side plate (13).

4. The coil structure of claim 3, wherein: The clearance groove (132) has a fan-shaped structure in the transverse direction.

5. The coil structure of claim 1, wherein: The coil lead-out end (2) is provided with a winding groove (22) on the outer periphery away from the second side plate (13) for fixing the coil winding by tin dipping.

6. The coil structure of claim 5, wherein: The lower groove wall of the winding groove (22) has a jack or slot (23) for the coil to pass through.

7. The coil structure according to any one of claims 1 to 6, characterized in that: The coil lead-out end (2) is a metal lead-out end structure made of conductive material.

8. A relay characterized by: The coil structure comprises any one of claims 1 to 7. The coil structure comprises any one of claims 1 to 7.

Images