CN212570742U

CN212570742U - Plug-in type aluminum electrolytic capacitor

Info

Publication number: CN212570742U
Application number: CN202021588428.XU
Authority: CN
Inventors: 熊军; 黄某辉; 林薏竹
Original assignee: Capxon Electronic Shenzhen Co ltd
Current assignee: Fengbin Electronic Technology Co ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-02-19
Anticipated expiration: 2030-07-31

Abstract

The utility model belongs to the technical field of the condenser, especially, relate to a plug-in components formula aluminum electrolytic capacitor, including capacitor body and two lead wires of being connected with the positive negative pole electricity of capacitor body respectively, the one end that capacitor body was kept away from to the lead wire has flat face of weld, and flat face of weld is used for welding on the circuit board so that the lead wire is connected with the circuit board electricity. The flat welding surface is arranged at the tail end of the lead, so that when the capacitor body is welded on the circuit board, the flat welding surface is attached to the specified position on the circuit board for welding, the contact area between the lead and the circuit board is greatly improved, the lead can be welded on the circuit board more stably, the capacitor body is welded on the circuit board and is less influenced by external vibration, the condition that the lead is welded on the circuit board in a false welding mode is effectively reduced, and the welding reliability is high; and the capacitor body is also convenient to be welded on the circuit board in a lying posture.

Description

Plug-in type aluminum electrolytic capacitor

Technical Field

The utility model belongs to the technical field of the condenser, especially, relate to a plug-in components formula aluminum electrolytic capacitor.

Background

The plug-in type aluminum electrolytic capacitor generally leads out two positive and negative leads from the capacitor body, and when in use, the two positive and negative leads are welded on a circuit board. However, when the conventional plug-in aluminum electrolytic capacitor is soldered to a circuit board, a cold solder is likely to occur, which results in poor vibration resistance characteristics and poor reliability of the plug-in aluminum electrolytic capacitor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a plug-in components formula aluminum electrolytic capacitor, when aiming at solving the plug-in components formula aluminum electrolytic capacitor among the prior art welding on the circuit board, technical problem that welded reliability is not high.

In order to achieve the above object, the utility model adopts the following technical scheme: a plug-in aluminum electrolytic capacitor comprises a capacitor body and two leads respectively electrically connected with the positive electrode and the negative electrode of the capacitor body, wherein one end, far away from the capacitor body, of each lead is provided with a flat welding surface, and the flat welding surfaces are used for being welded on a circuit board so that the leads are electrically connected with the circuit board.

Optionally, each of the two leads includes a conductive connector and a flat welding body electrically connected to the conductive connector, the two conductive connectors are electrically connected to the positive electrode and the negative electrode of the capacitor body, and the two opposite flat surfaces on the flat welding body form the flat welding surfaces.

Optionally, the conductive connector is in a straight strip shape.

Optionally, the conductive connecting body is bent.

Alternatively, the flat welded body is formed by press molding.

Optionally, the capacitor body includes a metal shell having a unidirectional opening, a primary core and a sealing assembly, the primary core is installed in the metal shell, the sealing assembly covers the opening of the metal shell, and the two leads are respectively electrically connected to the positive electrode and the negative electrode of the primary core and extend to the outside of the metal shell through the sealing assembly.

Optionally, the sealing assembly includes a rubber elastic member, the rubber elastic member covers the opening of the metal shell, and the two lead wires pass through the rubber elastic member and extend to the outside of the metal shell.

Optionally, the sealing assembly further includes a resin member, and the resin member covers the opening of the metal shell and is located at one end of the rubber elastic member far away from the element core.

Optionally, a shallow waist is provided at an end of the metal shell near the sealing assembly.

Optionally, the axial distance between the shallow girdling waist and the opening of the metal shell is one fifth of the axial distance of the metal shell.

The embodiment of the utility model provides a plug-in components formula aluminum electrolytic capacitor's beneficial effect: compared with the prior art, the plug-in type aluminum electrolytic capacitor of the utility model has the advantages that the flat welding surface is arranged at the tail end of the lead, when the capacitor body is welded on the circuit board, the flat welding surface is jointed with the appointed position on the circuit board for welding, so that the contact area between the lead and the circuit board is greatly improved, the lead can be more stably welded on the circuit board, the capacitor body is less influenced by external vibration when being welded on the circuit board, the condition of insufficient welding when the lead is welded on the circuit board is effectively reduced, and the welding reliability is high; and, through set up the flat welding face in the end of lead wire, also do benefit to with the posture welding of lying on the back of the body of capacitor on the circuit board.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a plug-in aluminum electrolytic capacitor according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the aluminum electrolytic capacitor of FIG. 1;

FIG. 3 is a schematic structural diagram of an application state of the plug-in aluminum electrolytic capacitor of FIG. 1;

fig. 4 is another schematic structural diagram of a plug-in aluminum electrolytic capacitor provided in an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an application state of the plug-in aluminum electrolytic capacitor of fig. 4.

Wherein, in the figures, the respective reference numerals:

10-a capacitor body;

11-a metal shell; 12-a biscuit core; 13-a seal assembly; 14-shallow girdling; 131-a rubber elastic member; 132-a resin member;

20-a lead;

21-a conductive connector; 22-flat welded body; 221-flat weld face;

30-circuit board.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to fig. 1-5 are exemplary and intended to be used to illustrate the invention, but should not be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1, 2 and 3, a description will now be given of a plug-in aluminum electrolytic capacitor according to an embodiment of the present invention. The plug-in aluminum electrolytic capacitor comprises a capacitor body 10 and two leads 20 respectively electrically connected with the positive electrode and the negative electrode of the capacitor body 10, wherein one end of the lead 20 away from the capacitor body 10 is provided with a flat welding surface 221, and the flat welding surface 221 is used for welding on a circuit board 30 so as to electrically connect the lead 20 with the circuit board 30.

Compared with the prior art, the plug-in type aluminum electrolytic capacitor provided by the embodiment of the utility model, through setting up flat welding face 221 at the end of lead wire 20, when welding capacitor body 10 on circuit board 30, make flat welding face 221 and circuit board 30 on the assigned position laminate mutually and weld, make the area of contact between lead wire 20 and circuit board 30 obtain great improvement like this, thus make lead wire 20 weld on circuit board 30 more firmly, can make capacitor body 10 weld receive external vibration's influence less on circuit board 30, reduced the lead wire 20 effectively and welded the condition that the rosin joint appears on circuit board 30, the reliability of welding is high; further, providing the flat bonding surface 221 at the end of the lead 20 also facilitates the bonding of the capacitor body 10 to the circuit board 30 in a lying posture.

In another embodiment of the present invention, as shown in fig. 1, 2 and 4, each of the two leads 20 includes a conductive connecting body 21 and a flat welding body 22 electrically connected to the conductive connecting body, the two conductive connecting bodies 21 are electrically connected to the positive electrode and the negative electrode of the capacitor body 10 respectively, and two opposite flat surfaces of the flat welding body 22 form a flat welding surface 221. Specifically, the conductive connecting body 21 and the flat welding body 22 are integrally formed, and the flat welding body 22 is arranged at the tail end of the lead 20, so that when the capacitor body 10 is welded on the circuit board 30, any flat welding surface 221 on the flat welding body 22 can be attached to the circuit board 30, and the use is convenient.

In another embodiment of the present invention, as shown in fig. 1, 2 and 3, the conductive connecting body 21 is in a straight strip shape. Specifically, when the conductive connecting body 21 is in a straight strip shape, the flat soldering body 22 and the conductive connecting body 21 are on the same straight line, that is, the flat soldering surface 221 is located at the side of the conductive connecting body 21, which is beneficial to soldering the capacitor body 10 on the circuit board 30 in a lying posture, and the soldering reliability is high.

In another embodiment of the present invention, as shown in fig. 1, 4 and 5, the conductive connecting body 21 is bent. Specifically, when the conductive connecting body 21 is bent, it is also advantageous to solder the capacitor body 10 to the circuit board 30 in a lying posture or solder the capacitor body 10 to the circuit board 30 in another posture by providing the end of the lead 20 as the flat solder body 22 which is flat.

In another embodiment of the present invention, the flat welded body 22 is formed by press molding. Specifically, the end of the lead 20 away from the capacitor body 10 is flattened by punching the end of the lead 20, so that the end of the lead 20 has two flat welding surfaces 221, thereby facilitating the welding of the lead 20 and facilitating the processing.

In another embodiment of the present invention, as shown in fig. 2, the capacitor body 10 includes a metal shell 11 having a one-way opening, a primary core 12 and a sealing assembly 13, the primary core 12 is installed in the metal shell 11, the sealing assembly 13 is covered at the opening of the metal shell 11, and two leads 20 are respectively electrically connected to the positive electrode and the negative electrode of the primary core 12 and pass through the sealing assembly 13 to extend to the outside of the metal shell 11. Specifically, the sealing assembly 13 is arranged at the opening of the metal shell 11, so that the opening is sealed by the sealing assembly 13, external impurities are prevented from entering the metal shell 11 to influence the element core 12, and the probability of electric leakage of the element core 12 is reduced; meanwhile, when external vibration acts on the lead 20, the sealing component 13 can fix the lead 20 and form a buffering effect, so that the external vibration is effectively absorbed, the external vibration is greatly reduced from being transmitted to the element core 12, the influence of the external vibration on the element core 12 is reduced, and the capacitor body 10 can be ensured not to cause structural change due to external stress generated by machining.

In another embodiment of the present invention, as shown in fig. 2, the sealing assembly 13 includes a rubber elastic member 131, the rubber elastic member 131 covers the opening of the metal shell 11, and the two leads 20 pass through the rubber elastic member 131 and extend to the outside of the metal shell 11. Specifically, the rubber elastic member 131 is arranged at the opening of the metal shell 11 for sealing, so that the rubber elastic member 131 can well form a buffer effect by utilizing the elastic property of the rubber elastic member, and absorb the external vibration; moreover, the rubber elastic member 131 has good sealing performance, and can prevent foreign matters from entering the metal shell 11.

In another embodiment of the present invention, as shown in fig. 2, the sealing assembly 13 further includes a resin member 132, and the resin member 132 covers the opening of the metal shell 11 and is located at one end of the rubber elastic member 131 away from the element core 12. Specifically, a certain distance is provided between one end of the rubber elastic member 131 away from the element core 12 and the opening of the metal shell 11, that is, a cavity is formed between the rubber elastic member 131 and the opening of the metal shell 11, and then liquid resin is poured into the cavity, so that the resin is cured and molded to form the resin member 132 after filling the cavity, so that the resin member 132 can further seal the opening of the metal shell 11; also, the resin member 132 has a better hardness so that the resin member 132 can better fix the lead wire 20 and protect the rubber elastic member 131. Thus, the opening of the metal shell 11 has a good sealing effect under the double sealing of the rubber elastic member 131 and the resin member 132; the lead 20 is fixed by the rubber elastic element 131 and the resin element 132, so that the lead 20 can be effectively prevented from loosening under external pulling, external vibration can be well prevented from being transmitted to the element core 12, and the element core 12 is effectively protected.

In another embodiment of the present invention, as shown in fig. 1 and 2, a shallow girdling waist 14 is provided at one end of the metal shell 11 near the sealing assembly 13. Specifically, by providing a shallow girdling 14 on the metal shell 11, wherein the shallow girdling 14 is an annular groove formed by recessing the outer side of the metal shell toward the inner side of the metal shell, the shallow girdling 14 can serve to fix the position of the seal assembly 13 on the metal shell 11, preventing the seal assembly 13 from moving relative to the inner wall of the metal shell 11 within the metal shell 11.

In another embodiment of the present invention, the axial distance between the shallow girdling 14 and the opening of the metal shell 11 is one fifth of the axial distance of the metal shell 11. Specifically, by setting the axial distance between the shallow girdling waist 14 and the opening of the metal shell 11 to one fifth of the axial distance of the metal shell 11, the sealing member 13 is restricted from exceeding this position to protect the element core 12 from being pressed by the sealing member 13 against the element core 12.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A plug-in type aluminum electrolytic capacitor is characterized in that: the capacitor comprises a capacitor body and two leads respectively electrically connected with the positive electrode and the negative electrode of the capacitor body, wherein one end, far away from the capacitor body, of each lead is provided with a flat welding surface, and the flat welding surfaces are used for being welded on a circuit board so that the leads are electrically connected with the circuit board.

2. The card-type aluminum electrolytic capacitor of claim 1, characterized in that: the two leads respectively comprise a conductive connector and a flat welding body electrically connected to the conductive connector, the two conductive connectors are respectively electrically connected with the positive electrode and the negative electrode of the capacitor body, and the two opposite flat surfaces on the flat welding body form the flat welding surfaces.

3. The card-type aluminum electrolytic capacitor of claim 2, characterized in that: the conductive connector is in a straight strip shape.

4. The card-type aluminum electrolytic capacitor of claim 2, characterized in that: the conductive connector is bent.

5. The card-type aluminum electrolytic capacitor of claim 2, characterized in that: the flat welding body is formed by punching.

6. The plug-in aluminum electrolytic capacitor according to any one of claims 1 to 5, characterized in that: the capacitor body comprises a metal shell with a one-way opening, a primary core and a sealing assembly, wherein the primary core is arranged in the metal shell, the sealing assembly covers the opening of the metal shell, and the two leads are respectively electrically connected with the positive electrode and the negative electrode of the primary core and penetrate through the sealing assembly to extend to the outside of the metal shell.

7. The card-type aluminum electrolytic capacitor of claim 6, characterized in that: the sealing assembly comprises a rubber elastic part, the rubber elastic part covers the opening of the metal shell, and the two lead wires penetrate through the rubber elastic part and extend to the outside of the metal shell.

8. The card-type aluminum electrolytic capacitor of claim 7, wherein: the sealing assembly further comprises a resin piece, and the resin piece covers the opening of the metal shell and is located at one end, far away from the element core, of the rubber elastic piece.

9. The card-type aluminum electrolytic capacitor of claim 6, characterized in that: and a shallow beam waist is arranged at one end of the metal shell close to the sealing component.

10. The card-type aluminum electrolytic capacitor of claim 9, wherein: the axial distance between the shallow beam waist and the opening of the metal shell is one fifth of the axial distance of the metal shell.