Capacitor

Abstract

The utility model discloses a capacitor, which comprises a capacitor core, a packaging shell, filling resin and an extraction electrode, the capacitor core comprises at least one capacitor core and two polar plates, one ends of the two polar plates are respectively welded on metal spraying surfaces at two ends of the capacitor core, and the other ends of the two polar plates are used for being connected with extraction electrodes; the inner ends of the two extraction electrodes are respectively connected to the two polar plates, and the outer ends of the two extraction electrodes extend out of one end of the packaging shell; the outer end of the extraction electrode comprises at least one plugging pin, the plugging pin is provided with an elastic structure, the elastic structure is provided with a deformation hole penetrating through the two ends, and the elastic structure is used for being in interference fit with a circuit board welding hole. By arranging the plug pins with the elastic structures on the capacitor, when the capacitor is installed, only the plug pins need to be inserted into the welding holes of the circuit board in an aligned manner, and interference assembly with the welding holes of the circuit board can be realized by utilizing extrusion deformation of the elastic structures, so that the capacitor is firmly fixed on the circuit board.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors. Background Art

[0002] With the rapid development of power electronics technology, metallized film capacitors are increasingly used in industrial control, new energy, automotive electronics, rail transit, power grid and other fields.

[0003] The traditional film capacitor structure is generally composed of a capacitor core (including plates, dielectrics and metal layers sprayed on both end surfaces), lead electrodes (usually leads, solder tabs or busbars), a packaging shell, and a filling resin (such as epoxy resin).

[0004] The installation of capacitors is generally to screw the ear of the package shell to the customer's box, and connect the lead electrode to the external circuit board through welding or screwing. The installation operation is laborious and time-consuming. Utility Model Content

[0005] The utility model aims to provide a capacitor which has the advantage of being easy to install.

[0006] In order to achieve the above purpose, the solution of the utility model is:

[0007] A capacitor comprises a capacitor core, a packaging shell, a filling resin and a lead electrode;

[0008] The capacitor core comprises at least one capacitor core and two pole plates, one end of the two pole plates is respectively welded to the gold-sprayed surface at both ends of the capacitor core, and the other end is used to connect with the lead-out electrode; the capacitor core is installed in the packaging shell and is sealed and fixed by filling resin;

[0009] There are two lead-out electrodes, and the inner ends of the two lead-out electrodes are respectively connected to the two electrode plates, while the outer ends of the two lead-out electrodes extend out of one end of the packaging shell;

[0010] The outer end of the lead-out electrode includes at least one plug pin, the plug pin has an elastic structure, the elastic structure has a deformation hole passing through both ends, and the elastic structure is used for interference assembly with the welding hole of the circuit board.

[0011] Furthermore, the elastic structure is integrally formed or separately connected to the plug pin.

[0012] Furthermore, the elastic structure includes a plug-in portion, a bulged portion and a connecting portion connected in sequence; the connecting portion and the plug-in pin are integrally formed or fixed by welding or riveting; the bulged portion includes two symmetrically arranged arc-shaped outer arch portions, and the deformation hole is between the two arc-shaped outer arch portions; the plug-in portion and the bulged portion are connected in an arc-shaped transition, the width of the plug-in portion is not greater than the width of the circuit board welding hole, and the widest width of the bulged portion is greater than the width of the circuit board welding hole.

[0013] Furthermore, reinforcing ribs are respectively provided on the opposite inner sides of the two arc-shaped outer arches, and the two reinforcing ribs are both located in the deformation hole and spaced apart from each other; one side of the two reinforcing ribs is flat, and the other side of the reinforcing ribs is directly connected to the inner side of the corresponding arc-shaped outer arch as a whole.

[0014] Furthermore, the width of the end of the bulging portion is smaller than the width of the connecting portion, and an arc-shaped limiting surface is formed between the end of the bulging portion and the connecting portion.

[0015] Furthermore, the inner end of the lead-out electrode is a connecting plate, and the outer end includes more than two plug-in pins, and the plug-in pins are arranged at intervals.

[0016] Furthermore, the outer ends of the lead electrodes extend out of the packaging opening of the packaging shell respectively; and plug-in pins are symmetrically arranged on both sides of the packaging opening.

[0017] Furthermore, the two lead-out electrodes are divided into a first lead-out electrode and a second lead-out electrode; the two pole plates are divided into a first pole plate and a second pole plate, the upper end of the first pole plate is welded to the gold-sprayed surface of the upper end of the capacitor core, and the lower end of the first pole plate extends to the side wall of the capacitor core and is connected to the inner end of the first lead-out electrode; the top surface of the second pole plate is welded to the gold-sprayed surface of the lower end of the capacitor core, and the bottom surface of the second pole plate is connected to the inner end of the second lead-out electrode.

[0018] Furthermore, it also includes insulating paper, and the insulating paper ring is arranged on the outer periphery of the side wall of the capacitor core.

[0019] Furthermore, there are two capacitor cores arranged side by side in the horizontal direction; the number of capacitor cores corresponding to the electrode plates is four, the number of capacitor cores corresponding to the lead-out electrodes is four, and they are symmetrically arranged.

[0020] After adopting the above technical solution, by setting the plug pin with elastic structure on the capacitor, when installing the capacitor, it is only necessary to insert the plug pin into the welding hole of the circuit board, and utilize the extrusion deformation of the elastic structure to achieve interference fit with the welding hole of the circuit board, so that the capacitor is firmly fixed on the circuit board. The inner wall of the welding hole can have a metal bushing, and there is no need to weld or screw the capacitor, which can greatly improve the installation efficiency of the capacitor. In addition, the packaging shell does not need to be designed with mounting ears to fix the capacitor, which can save materials and facilitate the reduction of the size of the packaging shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of an embodiment of the utility model;

[0022] Figure 2 A side view of an embodiment of the utility model;

[0023] Figure 3 An exploded view of an embodiment of the utility model;

[0024] Figure 4 It is a partial structural diagram of an embodiment of the utility model.

[0025] Explanation of reference numerals: capacitor core 1, capacitor core 11, gold-sprayed surface 111, electrode 12, first electrode 12a, second electrode 12b, packaging shell 2, packaging opening 21, filling resin 3, lead-out electrode 4, first lead-out electrode 4a, second lead-out electrode 4b, plug-in pin 41, elastic structure 42, deformation hole 421, plug-in portion 422, bulging portion 423, arc-shaped outer arch portion 4231, reinforcing rib 4232, connecting portion 424, arc-shaped limiting surface 425, connecting plate 43, insulating paper 5. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] like Figures 1 to 4 As shown, a capacitor of the utility model comprises a capacitor core 1, a packaging shell 2, a filling resin 3 and a lead electrode 4.

[0028] The capacitor core 1 comprises at least one capacitor core 11 and two pole plates 12, one end of the two pole plates 12 is respectively welded to the gold-sprayed surface 111 at both ends of the capacitor core 11, and the other end is used to connect with the lead-out electrode 4; the capacitor core 1 is installed in the packaging shell 2 and is sealed and fixed by the filling resin 3;

[0029] There are two lead-out electrodes 4, and the inner ends of the two lead-out electrodes 4 are respectively connected to the two electrode plates 12, while the outer ends extend out of one end of the packaging shell 2;

[0030] The outer end of the lead-out electrode 4 includes at least one plug pin 41, and the plug pin 41 has an elastic structure 42. The elastic structure 42 has a deformation hole 421 passing through both ends. The elastic structure 42 is used for interference fitting with a solder hole (not shown) of a circuit board.

[0031] Thus, by providing the plug pin 41 with the elastic structure 42 on the capacitor, when installing the capacitor, it is only necessary to insert the plug pin 41 into the welding hole of the circuit board, and utilize the extrusion deformation of the elastic structure 42 to achieve interference fit with the welding hole of the circuit board, so that the capacitor is firmly fixed on the circuit board. The welding hole can have a metal bushing, and there is no need to weld or screw the capacitor, which can greatly improve the installation efficiency of the capacitor. In addition, the packaging shell 2 does not need to be designed with mounting ears to fix the capacitor, which can save materials and facilitate the reduction of the size of the packaging shell 2.

[0032] In order to save costs, the elastic structure 42 can be designed to be separately connected to the plug pin 41, so as to mass produce the elastic structure 42, and the elastic structure 42 can be connected and fixed to the plug pin 41 by welding or convex point riveting. Of course, the elastic structure 42 can also be integrally formed with the plug pin 41.

[0033] like Figure 2 In this embodiment, the elastic structure 42 includes a plug-in portion 422, a bulging portion 423 and a connecting portion 424 connected in sequence; the connecting portion 424 and the plug pin 41 are integrally formed or welded or riveted; the bulging portion 423 includes two symmetrically arranged arc-shaped outer arches 4231, and the deformation hole 421 is between the two arc-shaped outer arches 4231; the plug-in portion 422 and the bulging portion 423 are connected in an arc-shaped transition, the width of the plug-in portion 422 is not greater than the width of the circuit board welding hole, and the widest width of the bulging portion 423 is greater than the width of the circuit board welding hole. In this way, the bulging portion 423 is conveniently inserted into the circuit board welding hole through the guidance of the plug-in portion 422.

[0034] In order to avoid excessive deformation and maintain the structural strength of the elastic structure 42, in this embodiment, reinforcing ribs 4232 are respectively provided on the inner sides of the two arc-shaped outer arches 4231, and the two reinforcing ribs 4232 are both located in the deformation hole 421 and are spaced apart from each other; the opposite side of the two reinforcing ribs 4232 is a plane, and the other side of the reinforcing ribs 4232 is directly connected to the inner side of the corresponding arc-shaped outer arch 4231 as a whole. Therefore, when the two arc-shaped outer arches 4231 of the bulging part 423 are pressed toward the deformation hole 421 to a certain extent, the planes of the two reinforcing ribs 4232 will abut against each other, limiting the bulging part 423 from further deformation.

[0035] Meanwhile, the width of the end of the bulging portion 423 is smaller than the width of the connecting portion 424 , and an arc-shaped limiting surface 425 is formed between the end of the bulging portion 423 and the connecting portion 424 .

[0036] See also Figure 3 and Figure 4The inner end of the lead-out electrode 4 is a connecting plate 43, and the outer end includes more than two plug-in pins 41, and each plug-in pin 41 is arranged at intervals.

[0037] like Figure 1 The outer ends of the lead electrodes 4 extend out of the package opening 21 of the package shell 2, and the two sides of the package opening 21 are symmetrically provided with plug pins 41. In this way, the capacitor has plug pins 41 on both sides to ensure the balance and stability of the capacitor after plugging.

[0038] Specifically, in this embodiment, there are two capacitor cores 11 arranged side by side in the horizontal direction; the number of the electrode plates 12 corresponding to the capacitor cores 11 is four, the number of the lead-out electrodes 4 corresponding to the capacitor cores 11 is four, and they are symmetrically arranged on the left and right of the two capacitor cores 11.

[0039] The two lead electrodes 4 of each capacitor core 11 are divided into a first lead electrode 4a and a second lead electrode 4b; the two plates 12 of each capacitor core 11 are divided into a first plate 12a and a second plate 12b (the two second plates 12b in this embodiment are of an integrated design), the upper end of the first plate 12a is welded to the gold-sprayed surface 111 of the upper end of the capacitor core 11, and the lower end of the first plate 12a extends to the side wall of the capacitor core 11 and is connected to the inner end of the first lead electrode 4a; the top surface of the second plate 12b is welded to the gold-sprayed surface 111 of the lower end of the capacitor core 11, and the bottom surface of the second plate 12b is connected to the inner end of the second lead electrode 4b. Insulating paper 5 is provided on the outer periphery of the side wall of the capacitor core 11 to insulate different plates 12 and lead electrodes 4.

[0040] Of course, the number of the capacitor cores 11 can be selected and set according to needs, and the arrangement of the corresponding plug pins 41 can also be adjusted for applicability, and is not limited to that shown in this embodiment.

[0041] The above is only a preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, equivalent changes and modifications without departing from the principle of the utility model should still fall within the protection scope of the utility model.

[0042] In the description of the embodiments of the present application, it should be understood that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use, or is the orientation or position relationship commonly understood by technical personnel in this field. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

Claims

1. A capacitor, characterized in that: It includes a capacitor core, a packaging shell, a filling resin and a lead electrode; The capacitor core comprises at least one capacitor core and two pole plates, one end of the two pole plates is respectively welded to the gold-sprayed surface at both ends of the capacitor core, and the other end is used to connect with the lead-out electrode; the capacitor core is installed in the packaging shell and is sealed and fixed by filling resin; There are two lead-out electrodes, and the inner ends of the two lead-out electrodes are respectively connected to the two electrode plates, while the outer ends of the two lead-out electrodes extend out of one end of the packaging shell; The outer end of the lead-out electrode includes at least one plug pin, the plug pin has an elastic structure, the elastic structure has a deformation hole passing through both ends, and the elastic structure is used for interference assembly with the welding hole of the circuit board.

2. A capacitor according to claim 1, characterized in that: The elastic structure is integrally formed or separately connected to the plug pin.

3. A capacitor according to claim 2, characterized in that: The elastic structure includes a plug-in portion, a bulged portion and a connecting portion which are connected in sequence; the connecting portion and the plug-in pin are integrally formed or fixed by welding or riveting; the bulged portion includes two symmetrically arranged arc-shaped outer arch portions, and the deformation hole is between the two arc-shaped outer arch portions; the plug-in portion and the bulged portion are connected in an arc-shaped transition, the width of the plug-in portion is not greater than the width of the circuit board welding hole, and the widest width of the bulged portion is greater than the width of the circuit board welding hole.

4. A capacitor according to claim 3, characterized in that: Reinforcing ribs are respectively arranged on the opposite inner sides of the two arc-shaped outer arches. Both reinforcing ribs are located in the deformation hole and are spaced apart from each other. One side of the two reinforcing ribs is a plane, and the other side of the reinforcing ribs is directly connected to the inner side of the corresponding arc-shaped outer arch as a whole.

5. A capacitor according to claim 3, characterized in that: The width of the end of the bulging portion is smaller than the width of the connecting portion, and an arc-shaped limiting surface is formed between the end of the bulging portion and the connecting portion.

6. A capacitor according to claim 1, characterized in that: The inner end of the lead-out electrode is a connecting plate, and the outer end includes more than two plug-in pins, and the plug-in pins are arranged at intervals.

7. A capacitor according to claim 1, characterized in that: The outer ends of the lead-out electrodes extend out of the packaging opening of the packaging shell respectively; and plug-in pins are symmetrically arranged on both sides of the packaging opening.

8. A capacitor according to claim 1, characterized in that: The two lead-out electrodes are divided into a first lead-out electrode and a second lead-out electrode; the two pole plates are divided into a first pole plate and a second pole plate, the upper end of the first pole plate is welded to the gold-sprayed surface of the upper end of the capacitor core, and the lower end of the first pole plate extends to the side wall of the capacitor core and is connected to the inner end of the first lead-out electrode; the top surface of the second pole plate is welded to the gold-sprayed surface of the lower end of the capacitor core, and the bottom surface of the second pole plate is connected to the inner end of the second lead-out electrode.

9. A capacitor according to claim 8, characterized in that: It also includes insulating paper, and an insulating paper ring is arranged on the outer periphery of the side wall of the capacitor core.

10. A capacitor according to claim 8, characterized in that: There are two capacitor cores arranged side by side in the horizontal direction; there are four capacitor cores corresponding to the pole plates, and there are four capacitor cores corresponding to the lead-out electrodes, and they are symmetrically arranged.

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