JPH0287509A - Terminal structure of capacitor - Google Patents

Abstract

PURPOSE:To simplify the connection process of a capacitor and an external wiring, and improve the connection state by installing a terminal plate wherein one end is fixed with a rivet penetrating a closing member, and the other end is bent almost parallel to an end surface of the closing member, and a fastener for a screw member or the like which is inserted into a through hole provided to the tip part of the terminal plate, and fixed. CONSTITUTION:One end of a terminal plate 9 is fixed to a closing member 5, and the other end-portion is bent so as to be parallel to the end surface of the closing member 5. In the tip part of the terminal plate 9, a through hole 11 is formed, into which the fastener of a screw member 4 or the like is inserted. A substrate 15 is arranged between the screw member 4 and the terminal plate 9, and connected electrically by tightening the screw member 4. Thereby, the tip part of the terminal 1 can be moved in the vertically inclined direction setting the bent part as a fulcrum. Since, e.g., a nut 10 to fix the screw member 4 is bonded to the terminal plate 10, the up and down movement of the terminal plate 9 is followed. As a result, errors in vertical direction in the wiring process are compensated by the buffering due to the up and down movements of the terminal plate 9 and the nut 10, and a desired connection state can be easily obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to improvements in capacitors, and particularly to a terminal structure for external connection that maintains electrical connection with other electronic components or wiring.

[Conventional technology]

A normal capacitor, for example a large electrolytic capacitor, has a capacitor element wound with electrode foil and electrolytic paper, which is housed in a bottomed cylindrical outer case, and the opening end of the outer case is made of Bakelite, elastic rubber, etc. It is sealed with a sealant. In order to lead the electrodes of the capacitor element to the outside, the sealing body is fixed with an external connection terminal consisting of a rivet penetrating the sealing body and a connecting portion fixed to the sealing body by the rivet.

In such large electrolytic capacitors, so-called screw terminals, in which a screw portion is formed on the terminal for external connection, are sometimes used in order to improve the connection state with the substrate. When wiring a capacitor with such a terminal structure, place a board with a through hole that matches the position of the terminal placed on the capacitor on the terminal, and insert a screw member into the through hole of the board and the screw part of the terminal. I'm tightening it up. By tightening this screw member, the capacitor and the board are fixed and electrically connected.

[Problem to be solved by the invention]

Incidentally, in recent years, automation has progressed in the wiring of electronic components to circuit boards and devices, and mounting is now being carried out using automatic mounting devices such as so-called robots. When connecting to a board using such an automatic mounting device, the arrangement of the screw members and the position of the screw terminal of the capacitor may not match, making the connection difficult. Conventionally, as a means to improve such inconveniences, for example, as in the device disclosed in Japanese Utility Model Application No. 60-137421 or No. 61-142429, external connection terminals have been provided with a movable but non-rotatable structure. It was considered to supplement the operational accuracy of the automatic mounting device by arranging a square nut in the state.

In the wiring process using a robot, etc., a screw member held by a screw tightening device installed at the tip of the operating arm of the robot is transferred to a through hole provided at the tip of the board and terminal plate.
Furthermore, the nut is tightened by the rotational action of this screw tightening device.

However, the position of the board and the terminal board of the capacitor depends on the vertical dimension of the capacitor body, the shape of the terminal board, the flat state of the board,
A slight deviation in the vertical direction may occur due to various factors such as the vertical dimensions of other adjacent electronic components and the accuracy of movement of the robot's operating arm.

In the above-mentioned invention, although the lateral error of the threaded member is corrected, such a longitudinal error cannot be corrected.

Therefore, in some cases, the screw member may not be able to reach the nut, or may not be able to make sufficient contact with the nut for tightening, making it impossible to obtain the desired connection state.

An object of the present invention is to simplify the process of connecting a capacitor to external wiring and to improve the connection state.

[Means to solve the problem]

This invention relates to a terminal structure for a capacitor, including a terminal plate whose one end is fixed by a rivet passing through the sealing body, and whose other end is bent approximately parallel to the end surface of the sealing body.
It is characterized by comprising a through hole provided at the tip of the terminal board, a fixing means formed in the through hole, and a fastener such as a screw member inserted through the through hole and fixed by the fixing means.

Further, the fixing means formed in the through hole of the terminal plate is a nut joined to the tip of the terminal plate, or a spiral groove provided on the inner peripheral surface of the through hole at the tip of the terminal plate. It is said that

Furthermore, on the end surface of the sealing body that overlaps the through hole at the tip of the terminal board,
A feature is that a recess is formed with a diameter larger than the diameter of a fastener such as a screw member.

[For production]

As shown in the drawing, one end of the terminal plate 9 has a sealing body 5.
The other end is bent so as to be substantially parallel to the end surface of the sealing body 5. A through hole 11 through which a fastener such as a screw member 4 is inserted is formed at the tip of the terminal plate 9 that is bent substantially parallel to the sealing body 5. 20 A fixing means for fixing the screw member 4, such as a nut 10, is connected to the through hole 11, and the screw member 4 inserted through the through hole 11 is fixed to the terminal plate 9. Substrate 15
is arranged between the screw member 4 and the terminal plate 9, and is electrically connected by tightening the screw member 4.

In such a terminal 1, only one end thereof is fixed to the sealing body 5, so that the tip portion of the terminal 1 can be moved diagonally up and down using the bent portion as a fulcrum. The means for fixing the screw member 4, for example, the nut 10, is connected to the terminal plate 9.
Since the terminal plate 9 is joined to the terminal plate 9, it follows the movement of the terminal plate 9 in the vertical direction.

Therefore, errors in the vertical direction during the wiring process are corrected by buffering due to the vertical movement of the terminal plate 9 and the nut 10, making it possible to easily obtain a desired connection state.

Furthermore, even if the vertical dimensions of adjacent electronic components are slightly different, the difference will be corrected by the bending of the terminal board 10.

〔Example〕

Next, embodiments of the invention will be described with reference to the drawings.

FIG. 1 is a partial sectional view showing a first embodiment of the invention, and FIG. 2 is a partial sectional view showing a second embodiment of the invention.

A tab 2 protrudes from an end surface of a capacitor element (not shown) and is electrically connected to a terminal 1 for external connection. A hard sealing body 5 made of laminated Bakelite 7, elastic rubber 6, etc. is attached to the opening of the exterior case that houses the capacitor element, and seals the inside of the capacitor.

The terminal 1 for external connection has a rivet 8 that penetrates the sealing body 5.
The terminal plate 9 is fixed to the sealing body 5 by the rivet 8, and the tab 2 is connected to the rivet 8 protruding from the back side of the sealing body 5 by pressing or other means to lead the electrode of the capacitor element to the outside. , the terminal plate 9 is made of aluminum, iron, copper, etc., and has a through hole 11 formed at its tip. A fastener such as a screw member 4 is inserted through the through hole 11 to lock the external board 15 to the terminal 1.

Furthermore, a fixing means such as a nut 10 is joined to the through hole 11 of the terminal plate 9. This nut 10 is joined so that the hole of the nut 10 overlaps the through hole 11 at the tip of the terminal plate 9, forming a negative through hole. The joining means may be any means such as welding or adhesive.

In the wiring process, the screw member 4 held by a screw tightening device or the like provided at the tip of the operating arm of the robot is inserted through the washer 3 into the through hole 11 at the tip of the substrate 15 and the terminal plate 9. Further, the screw member 4 is fixed to the nut 10 by tightening by the rotational operation of a screw tightening device, and the terminal 1 of the capacitor and the board 15 are electrically connected.

At this time, for example, if the vertical dimension of this capacitor is slightly shorter than the vertical dimension of another adjacent electronic component, if the screw member 4 is in contact with the nut 10 even slightly, the terminal plate 9 will be tightened as the screw member 4 is tightened. If the terminal plate 9 is bent upward, or if the terminal plate 9 is bent upward in advance, the terminal plate 9 will come into contact with the board 15, and the screw member 4 will be tightened properly.

FIG. 2 is a partial sectional view showing a second embodiment of the invention. In this embodiment, similarly to the first embodiment, a hard sealing member 5 is attached to the opening of the exterior case housing the capacitor element.

The sealing body 5 is equipped with a terminal plate 12 for external connection fixed at one end by a rivet 8 passing through the sealing body 5, and a spiral groove is formed on the inner circumferential surface at the tip of the terminal plate 12. It has a through hole 13.

Furthermore, the through hole 13 of the terminal plate 12 is formed on the surface of the sealing body 5.
A recess 14 is formed at a position that coincides with the above.

This recess 14 is formed to be larger than the diameter of a fastener such as a screw member disposed in the through hole 13 of the terminal plate 12.

In this embodiment, external wiring is placed in a through hole 13 provided at the tip of the terminal board 12 together with a fastener such as a screw member. Then, a screw tightening device is used to rotate and fit into the spiral groove provided on the inner circumferential surface of the through hole 13 and fix it. The tip of the stopper is then accommodated in the recess of the sealing body 5.

In this embodiment, compared to the first embodiment, parts such as nuts are not required, and therefore the process of forming the terminal 1 for external connection can be simplified.

Furthermore, a recess 14 is formed on the surface of the sealing body 5 in which the tip of the stopper is accommodated. Therefore, compared to the first embodiment, the distance between the tip of the terminal 1 and the sealing body 5 is shortened, and the vertical dimension of the entire capacitor can be reduced.

In the embodiment, the screw member 4 was used as a fastener for connecting the board 15 and the terminal 1, but a rivet-like fastener could be inserted into the through hole 11 of the terminal plate 9 and pressed to fix it. Good too.

〔Effect of the invention〕

As described above, in the terminal structure of a capacitor, the present invention includes a terminal plate whose one end is fixed by a rivet penetrating the sealing body and whose other end is bent almost parallel to the end surface of the sealing body, and the terminal plate of the terminal plate. It is characterized by consisting of a through hole provided at the tip, a fixing means formed in the through hole, and a fastener such as a screw member inserted through the through hole and fixed by the fixing means, so that external wiring can be avoided. Even if an automatic mounting device such as a robot is used to fix the capacitor to the terminal with a fastener such as a screw member, the capacitor may be damaged due to various factors such as the vertical dimension of the capacitor body, the shape of the terminal plate, and the movement accuracy of the robot's operating arm. The misalignment between the terminal and the board is compensated for by the flexure of the terminal board, making it easy to obtain the desired connection state.

Further, the fixing means formed in the through hole of the terminal plate is a nut joined to the tip of the terminal plate, or a spiral groove provided on the inner peripheral surface of the through hole at the tip of the terminal plate. Therefore, external wiring can be firmly fixed to the terminal using a screw member.

Furthermore, on the end surface of the sealing body that overlaps the through hole at the tip of the terminal board,
The feature is that a recess is formed that has a diameter larger than the diameter of the fastener such as a screw member, so the distance between the tip of the terminal board and the sealing body is smaller than the vertical dimension of the fastener that fixes the external wiring. It can be formed short, and the vertical dimension of the terminal as a whole can be shortened.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view showing a first embodiment of the invention, and FIG. 2 is a partial sectional view showing a second embodiment of the invention. 1...Terminal, 2...Tab, 3...Washer, 4...
... Screw member, 5... Sealing body, 6... Elastic rubber, 7
... Bakelite, 8... Rivet, 9.12...
・Terminal board, 10...nut, 11.13...through hole,
14... Concavity, 15... Substrate.

Claims (5)

[Claims] (1) A terminal plate whose one end is fixed by a rivet passing through the sealing body and whose other end is bent almost parallel to the end surface of the sealing body, and a through hole provided at the tip of this terminal plate;
A capacitor terminal structure comprising a fixing means formed in a through hole and a stopper inserted through the through hole and fixed by the fixing means. (2) Claim 1 characterized in that the fastener is a screw member.
Terminal structure of the capacitor described. (3) The capacitor terminal structure according to claim 2, wherein the fixing means formed in the through hole of the terminal plate is a nut joined to the tip of the terminal plate. (4) The capacitor terminal structure according to claim 2, wherein a spiral groove is provided on the inner peripheral surface of the through hole at the tip of the terminal plate. (5) On the end surface of the sealing body that overlaps the through hole at the tip of the terminal board,
2. The capacitor terminal structure according to claim 1, further comprising a recess having a diameter larger than that of the stopper.