CN217847706U - High-reliability sealed direct-insertion type film capacitor - Google Patents

Abstract

The utility model discloses a high reliable sealed formula film capacitor that cut straightly, including capacitor case, capacitor core group, lead-out wire and apron, the lower extreme of two relative curb plates of capacitor case is equipped with the shell recess of two ascending concave yield respectively, and the lead-out wire is including transversely drawing forth straightway and vertical straightway of drawing forth, and four straightways of drawing forth of lead-out wire pass four shell recesses respectively, and the apron is arranged the lower extreme in the capacitor case in, and the apron is equipped with vertical apron through-hole. The utility model discloses can realize the installation of cut straightly formula, can form the straight-line section of transversely drawing forth that is used for the location fixed again, under the long-term effect of mechanical vibration stress and operating temperature stress, the lead-out wire is because itself fixed and do not draw forth from sealed glue surface and can not appear and sealed the problem of ftractureing between the glue, ensures that the condenser performance is not influenced, has strengthened the environmental suitability of condenser, and the cost is saved and lead-out wire positioning accuracy is high to the sealed preceding location frock of glue that no longer needs of embedment simultaneously.

Description

High-reliability sealed direct-insertion type film capacitor

Technical Field

The utility model relates to a film capacitor especially relates to a high reliable sealed formula film capacitor that cut straightly belongs to film capacitor's production technical field.

Background

The film capacitor is also called an organic dielectric film capacitor, and a direct-insert structure is usually adopted, that is, the film capacitor is mainly installed on a circuit board in a plug-in welding mode, which is called a direct-insert film capacitor for short.

As shown in fig. 1 and fig. 2, the conventional direct-insertion type film capacitor includes a package housing 1, a capacitor core 2 and straight outgoing lines 3, wherein two straight outgoing lines 3 form a group, two groups of straight outgoing lines 3 are respectively connected with two ends of the capacitor core 2, the capacitor core 2 is placed in the package housing 1 and sealed and fixed by epoxy resin 4, and the straight outgoing lines 3 directly penetrate out of the epoxy resin 4 to serve as external outgoing electrodes; the straight lead-out wires 3 are usually tinned copper wires and are connected to the gold-sprayed end faces of the capacitor cores 2 in a welding manner to form electrical connections inside the capacitor.

The above-described conventional in-line thin film capacitor has the following drawbacks:

because the straight lead-out wire 3 directly penetrates out of the end face of the epoxy resin 4, the material of the straight lead-out wire 3 is generally a tinned copper wire, the bonding capability between the tinned copper wire and the epoxy resin 4 made of an organic polymer material is poor, the straight lead-out wire 3 and the epoxy resin 4 are easy to crack under the long-term action of mechanical vibration stress and working temperature stress, the sealing reliability is reduced, a fine channel for external substances to enter the interior is formed, the performance of the capacitor is reduced, and the environmental adaptability of the capacitor is influenced; meanwhile, before potting, an additional positioning tool is needed to position the straight outgoing line 3 to complete the potting of the product, and the positioning accuracy of the straight outgoing line 3 is difficult to achieve an ideal state.

In addition, as shown in fig. 3, in practical applications, in order to improve the space utilization rate in the entire chassis, the direct-insert type film capacitors 5 are usually mounted on both sides of the printed board 6, and in the process of double-sided mounting, because the distance between two groups of straight outgoing lines 3 and the distance between two straight outgoing lines 3 of each group are the same, the welding positions are the same during double-sided mounting, so that only the staggered mounting and the contraposition mounting of the two direct-insert type film capacitors 5 are caused, as shown in fig. 3, which greatly reduces the space utilization rate in the chassis.

SUMMERY OF THE UTILITY MODEL

The present invention aims to solve the above problems and provide a highly reliable and sealed direct-inserted film capacitor that does not crack between the lead-out wire and the sealant (generally epoxy resin).

The utility model discloses a following technical scheme realizes above-mentioned purpose:

the utility model provides a high reliable sealed formula film capacitor that cut straightly, includes capacitor case, capacitor core group and lead-out wire, two the lead-out wire is a set of, two sets of the lead-out wire respectively with the both ends of capacitor core group are connected, capacitor core group arranges in the capacitor case and sealed fixed through sealed glue, the lead-out wire stretches out outside sealed glue, high reliable sealed formula film capacitor that cut straightly still includes the apron, establishes capacitor case's open end is downwards, the lower extreme of two lateral walls of capacitor case is equipped with the shell recess of two indent upwards respectively, the lead-out wire is from being close to the position of shell recess begins to transversely buckle 90 formation outside earlier and transversely draws forth the straightway, again bends 90 downwards and forms vertical extraction straightway, four the horizontal extraction straightway of lead-out wire passes four shell recess respectively, and is horizontal shape of apron with the horizontal shape of capacitor case lower extreme is the same, the horizontal size of apron slightly is less than the horizontal size of capacitor case lower extreme, the apron is arranged in lower extreme in capacitor case and with the inner wall in close contact with the capacitor case lower extreme, four the horizontal extraction straightway of lead-out wire respectively with the upper surface contact of apron, four vertical extraction wires of lead-out of apron are equipped with the outside of capacitor case, the through-hole of the cover board respectively.

Preferably, in order to achieve the connection reliability between the cover plate and the capacitor shell and achieve more stable and reliable positioning and supporting of the outgoing line, two convex bosses are respectively arranged on the outer walls of two opposite sides of the cover plate, the four bosses are respectively arranged in the four shell grooves and are in close contact with the four shell grooves, and the outer walls of the bosses are flush with the corresponding outer walls of the capacitor shell.

Preferably, in order to realize more stable and reliable positioning and fixing of the outgoing lines, the width of the upper end of the shell groove is reduced to be slightly larger than the outer diameter of the outgoing lines to form a shell threading groove, a concave boss groove is formed in the upper surface of the boss, the shell threading groove and the corresponding boss groove form a circular threading hole together, and the four transverse outgoing straight-line segments of the outgoing lines respectively penetrate through the four threading holes.

Preferably, in order to facilitate the arrangement of the boss and improve the stability of connection between the cover plate and the capacitor case, two sides of the boss on the cover plate are provided with convex edges protruding upwards, the boss is arranged on the outer wall of the corresponding convex edge, the upper surface of the convex edge is provided with a convex edge groove corresponding to the boss groove, the bottom of the boss groove is as high as the bottom of the corresponding convex edge groove, and the transverse leading-out straight line segments of the leading-out wires are respectively arranged in the corresponding boss groove and the convex edge groove.

Preferably, in order to facilitate the implementation of double-sided alignment mounting on the same circuit board to save mounting space, the capacitor case is provided with a first case side wall and a second case side wall on two side walls of the case groove, and a distance between the two case grooves formed in the first case side wall is greater than a distance between the two case grooves formed in the second case side wall.

The beneficial effects of the utility model reside in that:

the utility model discloses a carry out twice 90 buckles with the lead-out wire, can realize the direct insert installation, can form the horizontal straightway of drawing forth that is used for fixing a position fixed again, fix a position the horizontal straightway of drawing forth through setting up the shell recess on capacitor case, support the location to the horizontal straightway of drawing forth through increasing the apron, and the lead-out wire is not drawn forth from sealed glue surface, so, under the long-term effect of mechanical vibration stress and operating temperature stress, the lead-out wire can not appear and sealed problem of splitting between glue because itself is fixed and not drawn forth from sealed glue surface, the outside material can not invade the condenser inside, ensure the condenser performance not influenced, the environmental suitability of condenser has been strengthened; simultaneously, no longer need other location frock to fix a position the lead-out wire before sealed glue of embedment, saved manufacturing cost, the positioning accuracy of lead-out wire is high moreover. Through with two sets of lead-out wires dislocation positioning, can realize the two-sided counterpoint installation on same circuit board, save installation space, improve the space utilization in the quick-witted case.

Drawings

FIG. 1 is an exploded perspective view of a conventional in-line thin film capacitor prior to assembly;

FIG. 2 is a perspective view of a conventional in-line thin film capacitor after assembly;

FIG. 3 is a perspective view of a conventional in-line film capacitor in a double-sided mounting;

fig. 4 is a perspective exploded view of the high reliability sealed in-line thin film capacitor of the present invention before assembly;

fig. 5 is an enlarged view of "a" in a perspective exploded view of the high reliability sealed in-line thin film capacitor of the present invention before assembly;

fig. 6 is a perspective view of the assembled high reliability sealed in-line thin film capacitor of the present invention;

fig. 7 is a perspective view of the high-reliability sealed direct-insert film capacitor of the present invention during double-sided installation.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 4-6, the highly reliable sealed direct-insert film capacitor of the present invention comprises a capacitor case 7, a capacitor core assembly 12, two groups of lead-out wires 13 and a cover plate 19, wherein the two groups of lead-out wires 13 are connected to two ends of the capacitor core assembly 12 respectively, the capacitor core assembly 12 is disposed in the capacitor case 7 and is sealed and fixed by a sealant 20, the lead-out wires 13 extend out of the sealant 20, the open end of the capacitor case 7 is set to be downward, the lower ends of two opposite sidewalls (i.e. a first case sidewall 9 and a second case sidewall 8) of the capacitor case 7 are respectively provided with two case grooves 11 which are recessed upward, the outgoing lines 13 are bent from positions close to the shell grooves 11 to the outside for 90 degrees to form transverse outgoing line sections 14, and then bent downwards for 90 degrees to form vertical outgoing line sections 15, the transverse outgoing line sections 14 of the four outgoing lines 13 penetrate through the four shell grooves 11 respectively, the transverse shape of a transverse cover plate 19 is the same as that of the lower end of the capacitor shell 7, the transverse size of the cover plate 19 is slightly smaller than that of the lower end of the capacitor shell 7, the cover plate 19 is arranged at the lower end of the capacitor shell 7 and is in close contact with the inner wall of the lower end of the capacitor shell 7, the transverse outgoing line sections 14 of the four outgoing lines 13 are in contact with the upper surface of the cover plate 19 respectively, the vertical outgoing line sections 14 of the four outgoing lines 13 are arranged on the outer sides of the capacitor shell 7 and the cover plate 19 respectively, and the cover plate 19 is provided with vertical cover plate through holes 18.

As shown in fig. 4-6, preferably, in order to achieve the connection reliability between the cover plate 19 and the capacitor shell 7 and achieve more stable and reliable positioning and supporting of the outgoing line 13, two convex bosses 17 are respectively arranged on the outer walls of two opposite sides of the cover plate 19, the four bosses 17 are respectively arranged in the four shell grooves 11 and are in close contact with the four shell grooves 11, and the outer walls of the bosses 17 are flush with the corresponding outer walls of the capacitor shell 7; in order to realize more stable and reliable positioning and fixing of the outgoing lines 13, the width of the upper end of the shell groove 11 is reduced to be slightly larger than the outer diameter of the outgoing lines 13 to form a shell threading groove 10, a concave boss groove 16 is arranged on the upper surface of the boss 17, the shell threading groove 10 and the corresponding boss groove 16 jointly form a circular threading hole, and the transverse outgoing straight line sections 14 of the four outgoing lines 13 respectively penetrate through the four threading holes; in order to facilitate the arrangement of the boss 17 and improve the stability of connection between the cover plate 19 and the capacitor case 7, two sides of the cover plate 19 on which the boss 17 is arranged are provided with convex edges 23 protruding upwards, the boss 17 is arranged on the outer wall of the corresponding convex edge 23, the upper surface of the convex edge 23 is provided with a convex edge groove 24 corresponding to the boss groove 16, the bottom of the boss groove 16 is as high as the bottom of the corresponding convex edge groove 24, and the transverse lead-out straight line segments 14 of the lead wires 13 are respectively arranged in the corresponding boss groove 16 and the convex edge groove 24; in order to facilitate the double-sided alignment mounting on the same circuit board (see the circuit board 22 in fig. 6) to save the mounting space, the two side walls of the capacitor case 7 with the case grooves 11 are respectively the first case side wall 9 and the second case side wall 8, and the distance between the two case grooves 11 on the first case side wall 9 is greater than the distance between the two case grooves 11 on the second case side wall 8.

As shown in fig. 4-7, in use, two high-reliability sealed in-line thin film capacitors 21 are inserted into the mounting holes from two opposite sides of the circuit board 22 in an aligned manner, so that the first housing sidewall 9 of the first high-reliability sealed in-line thin film capacitor 21 and the second housing sidewall 8 of the second high-reliability sealed in-line thin film capacitor 21 are located on the same side, the vertical outgoing straight line segment 15 of the two outgoing lines 13 on the second high-reliability sealed in-line thin film capacitor 21, which are closer to each other, is located between the vertical outgoing straight line segments 15 of the two outgoing lines 13 on the first high-reliability sealed in-line thin film capacitor 21, which are farther from each other, the vertical outgoing straight line segments 15 of the two outgoing lines 13 on the first high-reliability sealed in-line thin film capacitor 21, which are closer to each other, are located between the vertical outgoing straight line segments 15 of the two outgoing lines 13 on the second high-reliability sealed in-line thin film capacitor 21, and the welding of the two high-reliability sealed in-line thin film capacitors 21 is not affected, thereby realizing the double-side-line in-line installation of the two high-reliability sealed in-line thin film capacitors 21 on the circuit board 22.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not to the limitation of the technical solution of the present invention, as long as the technical solution can be realized on the basis of the above-mentioned embodiment without creative work, all should be regarded as falling into the protection scope of the right of the present invention.

Claims (5)

1. The utility model provides a high reliable sealed formula film capacitor that cut straightly, includes capacitor case, capacitor core group and lead-out wire, two the lead-out wire is a set of, and is two sets of the lead-out wire respectively with the both ends of capacitor core group are connected, capacitor core group arranges in sealed fixed through sealed glue in the capacitor case, the lead-out wire stretches out outside sealed glue its characterized in that: the high-reliability sealed direct-insert type film capacitor further comprises a cover plate, wherein the open end of the capacitor shell is arranged downwards, the lower ends of two side walls of the capacitor shell are respectively provided with two shell grooves which are recessed upwards, the outgoing lines are bent outwards at 90 degrees from the positions close to the shell grooves to form transverse outgoing straight lines, then bent downwards at 90 degrees to form vertical outgoing straight lines, the transverse outgoing straight lines of the four outgoing lines penetrate through the four shell grooves respectively, the transverse shape of the transverse cover plate is the same as that of the lower end of the capacitor shell, the transverse size of the cover plate is slightly smaller than that of the lower end of the capacitor shell, the cover plate is arranged at the lower end in the capacitor shell and is in close contact with the inner wall of the lower end of the capacitor shell, the transverse outgoing straight lines of the four outgoing lines are in contact with the upper surface of the cover plate respectively, the vertical outgoing straight lines of the four outgoing lines are arranged at the outer sides of the capacitor shell and the cover plate respectively, and the cover plate is provided with vertical cover plate through holes.

2. A highly reliable sealed in-line thin film capacitor according to claim 1, wherein: the outer walls of two opposite sides of the cover plate are respectively provided with two convex bosses, the four bosses are respectively arranged in the four shell grooves and are in close contact with the shell grooves, and the outer walls of the bosses are flush with the corresponding outer walls of the capacitor shell.

3. A highly reliable sealed in-line film capacitor according to claim 2 wherein: the width of the upper end of the shell groove is reduced to be slightly larger than the outer diameter of the outgoing line to form a shell threading groove, a concave boss groove is formed in the upper surface of the boss, the shell threading groove and the corresponding boss groove jointly form a circular threading hole, and the four transverse outgoing line segments of the outgoing line respectively penetrate through the four threading holes.

4. A highly reliable sealed in-line film capacitor according to claim 3 wherein: be equipped with on the apron the both sides of boss are equipped with bellied chimb that makes progress, the boss is located and is corresponded the outer wall of chimb, the upper surface of chimb be equipped with the chimb recess that the boss recess corresponds, the tank bottom of boss recess with correspond the tank bottom of chimb recess is equal height, the correspondence is arranged respectively in to the horizontal straightway of drawing forth of lead-out wire the boss recess with in the chimb recess.

5. An in-line thin film capacitor with high reliability of sealing according to any one of claims 1 to 4, wherein: the capacitor shell is provided with two side walls of the shell groove, namely a first shell side wall and a second shell side wall, and the distance between the two shell grooves arranged on the first shell side wall is larger than the distance between the two shell grooves arranged on the second shell side wall.

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