Flexible chip electrolytic capacitor

Abstract

The utility model discloses a flexible chip electrolytic capacitor, which comprises a capacitor body, a base, pins and a flexible connecting flat cable, wherein the capacitor body comprises a core bag with a polarity leading-out wire, a polarity leading-out wire guide pin led out from the core bag, and a packaging metal shell wrapping the core bag; the base comprises a mounting surface for mounting the capacitor body and a welding surface opposite to the mounting surface, and a pin through hole for communicating the mounting surface with the welding surface is formed in the base; the flexible connecting flat cable comprises a connecting end connected with the pins, a welding end welded on the circuit board, and a flexible lead main body connected between the welding end and the connecting end. The flexible SMD electrolytic capacitor is simple in structure and convenient to install and use.

Description

Technical Field

[0001] The utility model belongs to the technical field of capacitors, and in particular relates to a flexible patch electrolytic capacitor that is easy to install and use. Background Art

[0002] In the production of electronic products, surface mount technology (SMT) is often used to achieve high assembly density and reduce the size and weight of electronic products. It requires that electronic components be patch components. Generally, after using SMT, electronic products have high reliability, strong vibration resistance, low solder joint defect rate, good high-frequency characteristics, reduced electromagnetic and radio frequency interference, easy to realize automation, improve production efficiency, save materials, energy, equipment, manpower, time, etc.

[0003] Due to the above advantages of SMD components, electrolytic capacitor manufacturers are currently exploring the development of SMD electrolytic capacitors. By adding a base, the electrolytic capacitor is installed on the base, and then soldered to the printed circuit board through the lead wire. However, the current lead wire welding quality is poor, or the welding process is cumbersome, and the welding is time-consuming and labor-intensive, which greatly increases the production cost of the capacitor.

[0004] Therefore, in view of the defects of the above-mentioned chip electrolytic capacitors, it is necessary to carry out research and development to propose a technical solution to solve this problem and provide a flexible chip electrolytic capacitor that is easy to install and use.

[0005] The disclosure of the above background technology content is only used to assist in understanding the utility model concept and technical solution of the utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Utility Model Content

[0006] The purpose of the embodiment of the utility model is to provide a flexible electrolytic capacitor that is easy to install and use.

[0007] The technical solution of the embodiment of the utility model is achieved as follows:

[0008] A flexible chip electrolytic capacitor comprises a capacitor body, a base, pins and a flexible connecting cable; wherein the capacitor body comprises a core package with polarity lead wires, polarity lead wire guide pins led out from the core package, and a packaging metal shell wrapping the core package; the base comprises a mounting surface for mounting the capacitor body and a welding surface opposite to the mounting surface, and a pin through-hole connecting the mounting surface and the welding surface is provided on the base; the flexible connecting cable comprises a connecting end connected to the pin, a welding end welded on a circuit board, and a flexible lead body connected between the welding end and the connecting end.

[0009] In some embodiments, the bottom of the packaged metal shell adopts a sandwich design, and an explosion-proof patch is arranged between the bottom of the packaged metal shell and the bottom of the core package.

[0010] In some embodiments, one end of the flexible lead body is bent multiple times to form the connection end; the connection end is provided with a connection groove, and the pin of the capacitor is electrically connected to the flexible lead body through the connection groove.

[0011] In some embodiments, the pin is fixed to the connecting groove by welding or riveting.

[0012] In some embodiments, the width of the connection groove is greater than or equal to the width of the pin, and the length of the connection groove is greater than or equal to the length of the pin.

[0013] In some embodiments, the flexible lead body is provided with a positive lead circuit and a negative lead circuit corresponding to the positive and negative pins of the electrolytic capacitor, respectively.

[0014] In some embodiments, an isolation groove is provided between the positive lead circuit and the negative lead circuit.

[0015] In some embodiments, the flexible connecting cable is L-shaped, and the depth of the connecting groove is less than or equal to the thickness of the pin.

[0016] In some embodiments, the pin through hole is disposed in the middle of the base.

[0017] In some embodiments, the core package is circular in design and includes a positive polarity aluminum foil, electrolytic paper disposed on both sides of the positive polarity aluminum foil, a negative polarity aluminum foil, an electrolyte, and an electronic tape.

[0018] Compared with the prior art, the flexible patch electrolytic capacitor of the utility model has a simple structure and is easy to install and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a three-dimensional structural diagram of a flexible patch electrolytic capacitor according to an embodiment of the utility model.

[0021] Figure 2 It is a partial structural schematic diagram of a flexible chip electrolytic capacitor according to an embodiment of the utility model.

[0022] Figure 3 It is a partial structural decomposition schematic diagram of a flexible patch electrolytic capacitor according to an embodiment of the utility model.

[0023] Figure 4 It is a partially exploded diagram of a flexible chip electrolytic capacitor according to an embodiment of the utility model.

[0024] Figure 5 It is a schematic diagram from another angle of the flexible patch electrolytic capacitor of one embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the utility model clearer and more understandable, and to enable people in the technical field to better understand the solutions of the utility model, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0026] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for fixing or for circuit connection.

[0027] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the utility model and simplifying the description, and do 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 utility model.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, unless otherwise clearly specified and defined, the meaning of "multiple" is two or more, and the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0029] Reference Figure 1-5 As shown, the utility model flexible patch electrolytic capacitor 100 includes a capacitor body 1, a base 2, pins 3 and a flexible connecting cable 4; wherein, the capacitor body 1 includes a core package (not shown) with polarity lead wires, a polarity lead wire guide pin (not shown) led out from the core package, and a package metal shell 10 wrapping the core package, the bottom of the package metal shell 10 adopts a sandwich design, and an explosion-proof patch (not shown) is arranged between the bottom of the package metal shell 10 and the bottom of the core package; the flexible connecting cable 4 includes a connecting end 40 connected to the pin 3, a welding end 41 welded on the circuit board, and a flexible lead body 42 connected between the welding end 41 and the connecting end 40.

[0030] Please refer to Figure 1 , Figure 4 , Figure 5As shown, in some embodiments, the flexible lead body 42 is an FPC soft flat cable; one end of the flexible lead body 42 is bent to form the connection end 40; the connection end 40 is provided with a connection slot 401, and the pin of the capacitor is electrically connected to the flexible lead body 42 through the connection slot 401. In some embodiments, the pin 3 is fixed to the connection slot 401 by welding or riveting, the width of the connection slot 401 is greater than or equal to the width of the pin, and the length of the connection slot 401 is greater than or equal to the length of the pin. In some embodiments, the connection slot is square. It should be noted that in some other embodiments, the pin can also be fixed to the connection slot by other means. In the embodiment of the utility model, there are two connection slots to connect the positive and negative pins respectively. The welding end is in the same plane as the flexible lead body, and the welding end 41 is provided with a welding hole 410, which is welded on the circuit board through the welding hole 410, so as to realize the electrical connection between the flexible lead body 42 and the circuit board. In some embodiments, there are two welding holes 410 to correspond to the positive and negative pins of the electrolytic capacitor respectively. The flexible lead body 42 includes a positive lead circuit 420 and a negative lead circuit 421, which correspond to the positive and negative pins of the electrolytic capacitor respectively. An isolation groove 422 is arranged between the positive lead circuit and the negative lead circuit. In some embodiments, the isolation groove 422 is a square groove, and a plurality of through holes 4220 are arranged in the square groove, so as to increase the flexibility of the flexible lead body and facilitate bending.

[0031] In some embodiments, the flexible connecting cable is L-shaped, and the depth of the connecting groove is less than or equal to the thickness of the pin.

[0032] Reference Figure 2 , Figure 3 , Figure 4As shown, the base 2 includes a mounting surface 20 for mounting the capacitor body 1 and a welding surface 21 opposite to the mounting surface, and a pin through-hole 22 connecting the mounting surface 20 and the welding surface 21 is opened on the base 2; in some embodiments, the pin through-hole 22 is arranged in the middle position of the base 2; in some embodiments, there are two pin through-holes 22, respectively corresponding to the positive and negative pins of the capacitor; an arc-shaped support block 23 is provided on the mounting surface 20, and there are four arc-shaped support blocks 23, which are respectively arranged at the four corners of the mounting surface 20, and the inner side surfaces of the four arc-shaped support blocks 23 are arc-shaped surfaces, and the inner side surfaces of the four arc-shaped support blocks 23 enclose an inner circular cavity adapted to the outer circle of the capacitor body 1, and when the capacitor body 1 is installed on the base 2, the capacitor body 1 is supported and fixed by the inner circular cavity. In some embodiments, the outer side surfaces of two arc-shaped support blocks 23 are on the same vertical plane as the side walls of the base, and the outer side surfaces of the other two arc-shaped support blocks are perpendicular to the mounting surface 20 of the base, thereby forming two right-angled triangular positioning surfaces on the mounting surface.

[0033] In some embodiments, the pin 3 is connected to the polarity lead-out wire guide pin of the capacitor, and the tail end of the pin 3 is designed to be fishtail-shaped, and the solder paste climbs and covers the fishtail-shaped part of the tail end of the pin during welding. Specifically, the tail end of the pin is the solder foot. Due to the structure of the fishtail-shaped soldering surface of the solder foot, during the high temperature process of reflow soldering, the wetting effect of the tin liquid will crawl from the belly of the solder foot to the back of the solder foot, forming a covering crawling. In some embodiments, the lead-out end of the solder foot is designed to be a bevel fan-shaped or a trapezoidal soldering surface, so that the end of the pin is helpful for tin climbing, forming an encircling tin wall and a tin cap to pull, prevent components from falling off, and weld more firmly, so the vibration resistance is better, the conductivity is more stable, and the oxidation resistance life of the solder point is longer. The capacitor body 1 is installed on the mounting surface 20 of the base 2, and the pin 3 of the capacitor is inserted into the pin through-hole 22 on the base to extend out of the soldering surface 21, and the pin is bent and accommodated in the lead groove 212 on the soldering surface 21, and the capacitor is soldered to the printed circuit board by reflow soldering. Specifically, the pin 3 includes a connecting portion, a bending portion and a welding portion; the connecting portion is connected to the polarity lead-out wire guide pin of the core package, the bending portion is accommodated in the lead groove 212 on the welding surface after being bent from the connecting portion, and the thickness of the bending portion is equal to the depth of the lead groove 212, so that after the bending portion is accommodated in the lead groove 212, its surface is in the same horizontal plane as the welding surface 21; the welding portion extends out of the lead groove 212; the connection between the welding portion and the bending portion is provided with a vertical step transition; in some embodiments, the connection between the welding portion and the bending portion can also be provided with a smooth transition of an inclined surface. In some embodiments, the welding portion protrudes out of the notch 24 of the side wall of the base and extends outward.

[0034] In the embodiment of the utility model, the package metal shell 10 is an aluminum shell; the explosion-proof patch is made of special high-purity aluminum. The core package is circular in design, and includes positive polarity aluminum foil, electrolytic paper arranged on both sides of the positive polarity aluminum foil, negative polarity aluminum foil, electrolyte and electronic tape (not shown). The negative polarity aluminum foil is arranged on the outermost layer of the core package, close to or in contact with the metal shell that wraps the core package. The explosion-proof patch corresponds to the circular design of the core package.

[0035] It is understandable that the above content is a further detailed description of the utility model in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several substitutions or modifications to these described embodiments, and these substitutions or modifications should be deemed to belong to the scope of protection of this patent. In the description of this specification, the description of reference terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model.

[0036] In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples without contradicting each other. Although the embodiments of the utility model and their advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made herein without departing from the scope defined by the appended claims.

[0037] Furthermore, the scope of the present invention is not intended to be limited to the specific embodiments of the processes, machines, manufactures, compositions of matter, means, methods, and steps described in the specification. One of ordinary skill in the art will readily appreciate that the above disclosures, processes, machines, manufactures, compositions of matter, means, methods, or steps currently existing or to be developed that perform substantially the same functions as the corresponding embodiments described herein or obtain substantially the same results as the embodiments described herein may be utilized. Therefore, the appended claims are intended to include such processes, machines, manufactures, compositions of matter, means, methods, or steps within their scope.

Claims

1. A flexible electrolytic chip capacitor, characterized in that: It includes a capacitor body, a base, pins and a flexible connecting cable; wherein the capacitor body includes a core package with polarity lead wires, polarity lead wire guide pins led out from the core package, and a packaging metal shell that wraps the core package; the base includes a mounting surface for mounting the capacitor body and a welding surface opposite to the mounting surface, and the base is provided with a pin through-hole connecting the mounting surface and the welding surface; the flexible connecting cable includes a connecting end connected to the pin, a welding end welded on a circuit board, and a flexible lead body connected between the welding end and the connecting end.

2. The flexible electrolytic chip capacitor according to claim 1, characterized in that: The bottom of the packaged metal shell adopts a sandwich design, and an explosion-proof patch is arranged between the bottom of the packaged metal shell and the bottom of the core package.

3. The flexible electrolytic chip capacitor according to claim 1, characterized in that: One end of the flexible lead body is bent multiple times to form the connection end; the connection end is provided with a connection groove, and the pin of the capacitor is electrically connected to the flexible lead body through the connection groove.

4. The flexible electrolytic chip capacitor according to claim 3, characterized in that: The pin is fixed to the connecting groove by welding or riveting.

5. The flexible electrolytic chip capacitor according to claim 4, characterized in that: The width of the connecting groove is greater than or equal to the width of the pin, and the length of the connecting groove is greater than or equal to the length of the pin.

6. The flexible electrolytic chip capacitor according to claim 1, characterized in that: The flexible lead body is respectively provided with a positive lead circuit and a negative lead circuit corresponding to the positive and negative pins of the electrolytic capacitor.

7. The flexible electrolytic chip capacitor according to claim 6, characterized in that: An isolation groove is provided between the positive electrode lead circuit and the negative electrode lead circuit.

8. The flexible electrolytic chip capacitor according to claim 3, characterized in that: The flexible connecting cable is L-shaped, and the depth of the connecting groove is less than or equal to the thickness of the pin.

9. The flexible electrolytic chip capacitor according to claim 1, characterized in that: The pin through hole is arranged at the middle position of the base.

10. The flexible electrolytic chip capacitor according to claim 1, characterized in that: The core package is circular in design and includes positive polarity aluminum foil, electrolytic paper arranged on both sides of the positive polarity aluminum foil, negative polarity aluminum foil, electrolyte and electronic tape.

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