JP2013187290A - Capacitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a capacitor which inhibits bubbles from remaining in a resin even when a guide body for guiding an external connection terminal is included in a case opening.SOLUTION: In a capacitor, a capacitor element 20 is housed in a case 10. Further, an external connection terminal 40 is led out to the exterior of the case 10 through an upper lid 50 attached to a case opening 13 and a resin 60 fills the case 10. The upper lid 50 includes: a frame body 51 arranged along an opening end part 12a of the case 10; a guide body 52 guiding the external connection terminal 40 at the inner peripheral side of the frame body 51; and connection members 53 which radially extend from the guide body 52 toward the frame body 51 and connect the guide body 52 with the frame body 51. A communication part 54, allowing the interior of the case 10 to communicate with the exterior, is provided in a part enclosed by the frame body 51, the guide body 52, and the connection members 53.

Description

  The present invention relates to a capacitor in which a terminal is pulled out of a case and the case is filled with resin.

  The capacitor element is housed in the case, filled with resin, and in the capacitor by pulling out the terminal part of the electrode plate connected to the capacitor element to the outside of the case, the lead-out position of the terminal part to the outside of the case is always constant. For the main purpose, attaching an upper lid provided with a guide hole for guiding the terminal portion to the case opening and drawing the terminal portion out of the case from the guide hole has been conventionally performed as shown in Reference 1, for example. It has been broken.

  The capacitor is formed by filling the case with resin from a resin filling hole provided at the center of the upper lid after the upper lid is attached to the case opening.

JP 2006-49556 A

  However, in the capacitor configured as described above, when the resin is filled in the case, there is a possibility that bubbles may accumulate on the lower surface (case bottom side) of the upper lid. It is desirable to eliminate bubbles remaining in the resin because they cause cracks and reduce moisture resistance of the capacitor. However, since the case opening is almost closed by the top lid, it is necessary to remove the bubbles. It was difficult.

  Therefore, the present invention has been made to solve the above-described problem, and suppresses the remaining of bubbles in the resin while providing a guide body for guiding a terminal for external connection in the case opening. An object of the present invention is to provide a capacitor that can be used.

  In order to solve the above-described problem, the capacitor of the present invention accommodates the capacitor element 20 in the case 10 and draws the external connection terminal 40 to the outside of the case 10 through the upper lid 50 attached to the case opening 13. In the capacitor formed by filling the resin in the case 10, the upper lid 50 guides the frame body 51 along the opening end 12 a of the case 10 and the terminal 40 for external connection on the inner peripheral side of the frame body 51. A guide body 52 and a connecting member 53 that extends radially from the guide body 52 toward the frame body 51 and connects the guide body 52 and the frame body 51, and includes the frame body 51, the guide body 52, and the connecting member 53. A communication portion 54 that communicates the inside and the outside of the case 10 is provided in a portion surrounded by.

  According to the capacitor of the present invention, the terminal for external connection is guided by the guide body connected to the frame body via the connecting member, so that the lead-out position of the terminal can be always constant with respect to the case, The product can be made uniform easily, and the communication part that connects the inside and the outside of the case is provided in the part surrounded by the frame body, guide body and connection member. The air inside the case can be removed, the bubbles remaining in the resin can be suppressed, and the occurrence of cracks due to the bubbles can be suppressed.

It is a perspective view which shows the assembly-like body of the capacitor | condenser which concerns on embodiment of this invention. Similarly, it is a sectional view of the capacitor. Similarly, it is a sectional view of the capacitor. It is the perspective view which looked at the upper cover from the lower side. It is a perspective view showing a capacitor concerning an embodiment of the present invention.

  Next, an embodiment of a capacitor of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 to 5, the capacitor 1 according to the present invention has a case 40 in which a capacitor element 20 is housed in a case 10 and a terminal 40 connected to the capacitor element 20 via an electrode plate 30 is attached to the case opening 13. In addition, the case 10 is pulled out to the outside of the case 10 through the upper lid 50 and filled with a resin 60 in the case 10. Hereinafter, the components of the capacitor 1 will be described in detail.

  As shown in FIGS. 1 and 5, the case 10 includes a case bottom 11 and case side walls 12 that extend from the four sides of the bottom substantially orthogonal to the case bottom 11. An opening 13 for accommodating the capacitor element 20 and the electrode plate 30 in the internal space of the case 10 is provided on the surface facing the bottom 11. In addition, as a material of case 10, various things, such as metals, such as resin and aluminum, can be used. Further, the shape may be various shapes such as a cylindrical shape as long as the capacitor element 20 and the electrode plate 30 can be accommodated in the internal space.

  The capacitor element 20 is a film capacitor formed by winding a metallized film in which a metal is vapor-deposited on an insulating film, for example. As shown in FIGS. Electrode portions 20a and 20a formed by thermal spraying are formed. The capacitor element 20 is not limited to a film capacitor, and various capacitors may be used, and the shape may be various shapes such as a cylindrical shape and a rectangular shape. 2 and 3, a plurality of capacitor elements 20 are provided, but one capacitor element 20 may be provided.

  As shown in FIG. 3, the electrode plate 30 is a metal plate provided along the case side wall 12, and the case opening 13 side is bent so as to be substantially parallel to the case opening 13. Has been. The bent portion 31 is provided with a through hole 31a through which the terminal 40 can be inserted.

  As shown in FIGS. 1 to 5, the terminal 40 has a cylindrical shape, and a screw hole 40 a for connecting to an external electric component is formed in the shaft center portion. A small-diameter portion 41 extends from an end opposite to the screw hole 40 a (the lower side in FIGS. 2 and 3), and the small-diameter portion 41 is inserted into the through hole 31 a of the electrode plate 30. In addition, as what connects with an external electrical component, you may project a male screw other than the screw hole 40a, and can change suitably according to the connection structure of an external electrical component.

  As shown in FIGS. 1 and 4, the upper lid 50 includes a frame body 51 formed in an annular shape along the opening end 12 a of the case 10 and a guide body 52 including a guide hole 52 a through which the terminal 40 can be inserted. And a connecting member 53 that connects the frame body 51 and the guide body 52 to each other.

  Specifically, as shown in FIGS. 1 to 4, the frame 51 includes an outer peripheral portion 51 a that contacts the outer peripheral surface of the opening end 12 a of the case 10 and an inner periphery of the opening end 12 a of the case 10. The inner peripheral part 51b contact | abuts to a surface and the connection part 51c which connects the upper end part of the outer peripheral part 51a, and the upper end part of the inner peripheral part 51b are comprised. As shown in FIGS. 2 and 3, the inner peripheral portion 51 b extends longer than the outer peripheral portion 51 a toward the lower side (case bottom 11 side). Moreover, the lower end side of the inner peripheral part 51b is inclined in the direction of decreasing its diameter, and the attachment of the frame 51 to the case opening 13 is easy.

  As shown in FIGS. 1 and 4, the guide body 52 is positioned approximately at the center of the frame body 51 on the inner peripheral side of the frame body 51. Further, the shape thereof is substantially oval in plan view, and two guide holes 52a for inserting the terminals 40 are formed. As shown in FIGS. 2 and 3, the guide hole 52a is tapered so as to increase in diameter toward the lower side (case bottom 11 side), and the guide hole 52a of the terminal 40 from below is guided to the guide hole 52a. Easy to insert. Further, the periphery of the guide hole 52a is extended in the vertical direction in order to improve the guide function. Further, a substantially V-shaped inclined portion 52b is provided on the lower surface side (case bottom portion 11 side) of the guide body 52 in order to suppress the accumulation of bubbles.

  As shown in FIGS. 1 and 4, the connecting member 53 is a narrow rod-like body, and is extended radially from the guide body 52 toward the vicinity of the substantially central portion of each side of the frame body 51. Yes. Further, a substantially V-shaped inclined portion 53a is provided on the lower surface side (case bottom 11 side) of the connecting member 53 in order to suppress the accumulation of bubbles. Further, as shown in FIGS. 2 and 3, the connecting member 53 is positioned below (case bottom 11 side) compared to the frame body 51 and the guide body 52. This is because if the connecting member 53 is positioned across the inside and outside of the resin 60, cracks may occur starting from the connecting member 53, and the connecting member 53 is reliably positioned within the resin 60 (below the resin surface). It is the structure for. In addition, although the four connection members 53 are provided as shown in FIG. 1, three or less or five or more may be sufficient. Moreover, although it extended in the approximate center part of the edge | side of the frame 51, you may extend in the corner | angular part. Further, the radial shape means that all the angles formed by the connecting members 53 adjacent to each other are substantially the same angle (for example, the number of the connecting members 53 is four and the angles are each about 90 degrees). The present invention is not limited, and includes ones each having a different angle (for example, three connecting members 53 having three angles of about 90 degrees, about 90 degrees, and about 180 degrees).

  In addition, the part enclosed by the inner peripheral part 51b of the frame 51, the guide body 52, and the connection member 53 is opening, and when the upper cover 50 is attached to the case opening part 13 as shown in FIG. In this case, the inside and the outside of the case 10 are in communication. Hereinafter, the opening will be referred to as a communication portion 54 for the sake of explanation.

  Next, the assembly procedure of the capacitor 1 of the present invention will be described in detail. First, the small-diameter portion 41 of the terminal 40 is inserted into the through hole 31a provided in the bent portion 31 of the electrode plate 30 and connected with solder or the like. Next, the electrode plates 30 and 30 are connected to the electrode portions 20a and 20a of the capacitor element 20, respectively. When the capacitor element 20 and the electrode plate 30 are connected, the capacitor element 20 and the electrode plate 30 may be directly connected by solder or the like, or may be connected by interposing a lead wire or the like. . The integrated capacitor element 20 and the electrode plates 30 and 30 are housed in the case 10 from the case opening 13 such that the terminals 40 are located on the case opening 13 side.

  Next, the upper lid 50 is attached to the case opening 13. At this time, the opening end 12a of the case 10 is interposed between the outer peripheral portion 51a and the inner peripheral portion 51b of the frame 51, and the opening end 12a is brought into contact with the connecting portion 51c. In addition, since the inner peripheral part 51b of the frame 51 is formed long, when the upper cover 50 is attached to the case opening 13, the capacitor element 20 or the electrode plates 30, 30 and the inner peripheral surface of the case 10 are interposed. The inner peripheral portion 51b is interposed, and insulation is ensured even when the case 10 is formed of a conductive material. At this time, the terminal 40 is inserted into the guide hole 52 a of the guide body 52 and protrudes from the guide body 52 toward the outside of the case 10.

  After the attachment of the upper lid 50 to the case opening 13 is completed, the resin 60 is filled into the case 10 from the communication portion 54. At this time, filling is performed until the connecting member 53 is positioned below the resin surface. And the assembly of the capacitor | condenser 1 is completed when the filled resin 60 hardens | cures.

  In the capacitor 1 having the above configuration, the terminal 40 for external connection is guided by the guide body 52 coupled to the frame body 51 via the coupling member 53, so that the lead-out position of the terminal 40 is always constant with respect to the case 10. In addition, it is possible to easily equalize the product, and to communicate with the inside and the outside of the case 10 in a portion surrounded by the frame body 51, the guide body 52, and the connecting member 53. 54 is provided, the air inside the case 10 can be removed from the communication portion 54, the bubbles remaining in the resin 60 can be suppressed, and the occurrence of cracks due to the bubbles can be suppressed. Can do.

  Although specific embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. For example, in the above embodiment, the inclined portions 52 b and 53 a are provided on the lower surface of the guide body 52 and the lower surface of the connecting member 53, but a curved surface that protrudes downward may be used. Further, the connecting member 53 may be provided with a hole for removing bubbles. Further, in assembling the capacitor 1, after filling the resin 60, the bubbles remaining in the resin 60 may be removed by tilting the case 10 or applying vibration.

  1 .. Capacitor 10.. Case 20.. Capacitor element 40.. Terminal 50.. Top cover 51.. Frame body 52. Guide body 53.. Connecting member 54. 60..Resin

Claims (1)

  The capacitor element (20) is accommodated in the case (10), and the external connection terminal (40) is pulled out of the case (10) through the upper lid (50) attached to the case opening (13). (10) In the capacitor formed by filling the resin (60) in the upper lid (50), the frame (51) along the opening end (12a) of the case (10) and the frame (51) A guide body (52) for guiding the external connection terminal (40) on the inner peripheral side, and radially extending from the guide body (52) toward the frame body (51), the guide body (52) and the frame body A connecting member (53) for connecting (51) to a portion surrounded by the frame (51), the guide body (52), and the connecting member (53); A communication section (54) for communicating Capacitors.