JP2000260663A - Structure for liquid-tightly planting terminal metallic part to insulating plate and plating method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To plant a flanged terminal metallic part to an insulating plate with good liquid- tightness and allow the terminal metallic part to be tightly connected by screwing to an external conductor by inserting the flanged terminal metallic part made of a ductile metal into a hole formed in an insulating plate so that a rubber ring provided on the surface of a flange portion of the flanged terminal metallic part touches the hole, integrating the circumferential edge portion of a projection from the insulating plate with a flange portion while spreading by drawing and caulking the circumferential edge portion using the hole edge of an extruding die. SOLUTION: A noncircular flat recess 3 is formed so as to be continuous to a hole 2 of a plastic-formed, hard insulating plate 1, and a ductile terminal metallic part 5 having a flange 4 whose contour is the same as that of the recess 3 and made of a spreadable metal is inserted into the hole 2 so as to be accommodated in the recess 3 with a rubber ring 6 provided on the inner surface of the flange 4 touches the recess 3. Then, a circumferential edge portion 7A of a terminal metallic part projection 7 projecting from the plate 1 is forcibly scraped and spread out by drawing in the direction of the flange 4 using the hole edge of an extruding die 9 having a hole 8 whose diameter is one size smaller than the flat contour of the portion 7A, to form a flange 10 press fit to the surface of the insulating plane by caulking to prevent the rotation of the part 5. Additionally, by compressing the ring 6 while tightly clamped between the flange 4 and the plate 1, the part 5 and the plate 1 are maintained in a liquid-tight state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid-tight planting structure of a terminal fitting suitable for use in a case where a conductive terminal of a hermetically sealed capacitor or other hermetically sealed electric component is planted in an insulator in a liquid-tight manner. Regarding planting method.

[0002]

2. Description of the Related Art Conventionally, as a terminal adopting structure of this kind, there has been one disclosed in, for example, Japanese Utility Model Publication No. 55-105936. In this conventional technique, a pin-shaped terminal tube having a hollow end portion and a flange at a center portion is inserted through a superposed plate of a hard insulating plate and a rubber plate, and a peripheral edge of the flange portion is bitten into the synthetic rubber plate. The lower end of the terminal tube is crushed and crimped so as to ensure airtightness and liquid tightness, and the end of this crimping stop portion is brought into electrical contact with the capacitor main body directly or through a (chrysant) washer, Also, a terminal plug device for a capacitor in which an external conductor is inserted into the hollow portion at the other end of the terminal tube, and the terminal tube at the peripheral edge thereof is crushed with a crimping tool or the like to firmly couple the other end of the terminal tube and the external conductor.

[0003]

In the prior art described above, a pin-shaped terminal metal tube having an outer flange is inserted into a hole of an insulating plate, and a terminal tube portion protruding from the insulating plate is simply crushed by the insulating plate. By crimping, the terminal metal tube is merely implanted on the insulating plate, and since there is no rotation stopping portion of the terminal tube with respect to the insulating plate, it is important to screw the external conductor to the terminal tube. There is an essential and serious problem that the terminal tube rotates together with the screw and the external conductor cannot be screw-connected to the terminal tube.

[0004] In addition to this, a roulette (Roulette) which is usually called a "knurl" and is used for stopping rotation on the outer surface.
Although a terminal fitting having a te) cut out and implanted into an insulating plate by insert molding is also conventionally known, in this conventional example, a minute gap due to the roulette or the like occurs between the terminal fitting and the insulating plate. Therefore, there is a problem that the liquid-tightness is incomplete and cannot be used as a terminal plug of a sealed electric component such as a large-capacity electrolytic capacitor.

According to the present invention, in order to eliminate the above-mentioned problems, a terminal with an outer flange made of extensible metal is inserted through a hole formed in an insulating plate up to a rubber ring disposed on the flange surface. By pressing the peripheral portion of the protruding portion of the terminal fitting from the insulating plate at the edge of the hole of the die and spreading and caulking to integrally form the flange, the terminal fitting is planted with good liquid tightness on the insulating plate,
It is an object of the present invention to allow an external conductor to be tightly screwed to the terminal fitting.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to insert a terminal fitting having an outer flange into a hole of an insulating plate and to caulk a protruding portion of the terminal fitting protruding from the insulating plate to the insulating plate. In planting the terminal fitting on the insulating plate,
Forming a hole and a non-circular flat recess connected to this hole in a plastic molded hard insulating plate, and forming a terminal metal made of an extensible metal having an outer flange having the contour of the recess in the hole of the insulating plate. Inserting the outer flange into the flat recess by inserting the rubber ring disposed on the inner surface of the outer flange into the flat recess, and forming the outer peripheral portion of the terminal fitting protruding portion protruding from the insulating plate with a vertical hole one size smaller than the plane profile of the push die. By pressing and shaping in the direction of the outer flange at the hole edge and spreading and caulking and forming a flange portion pressed against the insulating plate surface, the outer flange is deeply inserted into the non-circular flat recess and the terminal fitting is prevented from rotating. This can be achieved by compressing the rubber ring with the outer flange and the insulating plate tightly sandwiched therebetween to maintain a liquid-tight space between the terminal fitting and the insulating plate.

In addition, a rubber ring in which a terminal fitting made of extensible metal and having an outer flange and the above-mentioned hole contour portion is disposed in a non-circular hole penetrated through the insulating plate and disposed on the inner surface of the outer flange, the hole contour portion is sandwiched. The terminal fittings may be inserted to prevent rotation of the terminal fittings.

[0008]

Embodiments of the present invention will be described with reference to the drawings. First, in the first embodiment of the present invention, as shown in FIGS. 1 and 2A and 2B, a terminal fitting 5 having an outer flange 4 is inserted into a hole 2 of an insulating plate 1. Then, by crimping a terminal portion protruding from the insulating plate 1 to the insulating plate 1, the terminal fitting 5 is connected to the insulating plate 1 as shown in FIG.
When planting in an insulation board, the insulation board 1 is made by molding with a plastic such as phenol resin or polyphenylene sulfide.
As shown in FIG. 2 (a), a hole 2 and a non-circular flat recess 3 such as a square or an ellipse are formed in the hole 2 of the insulating plate 1 as shown in FIG. As shown in FIG. 3, a terminal fitting 5 made of a spreadable metal formed by cold forging or casting and having an outer flange 4 having the above-mentioned concave contour is inserted into a rubber ring 6 disposed on the inner surface of the outer flange as shown in FIG. The flange 4 is placed shallowly in the flat recess 3, and a fixing die D is applied to the outer surface of the outer flange 4.

Next, as shown in FIG. 2 (b), the peripheral portion 7A of the protruding portion 7 of the terminal fitting 5 protruding from the insulating plate 1 has a vertical hole 8 which is slightly smaller than its plane contour, and is used for a hydraulic press machine or the like. As shown in FIG. 4 and FIG. 5, the movable body moves strongly by a predetermined size by a well-known means, and is pressed and cut in the direction of the outer flange as shown in FIGS. Pressing part 1 pressed against the insulating plate surface as shown in FIG.
By forming the outer flange 4 deeply into the non-circular recess 3 to prevent the terminal fitting 5 from rotating, the outer ring 4 allows the rubber ring 6 to be insulated by the outer flange 4.
The terminal metal 5 and the insulating plate 1 can be maintained in a liquid-tight manner by tightly contacting with each other, and if the pressing die 9 is removed by opening it, a product according to the present invention as shown in FIG. 1 can be obtained. .

In the example shown in FIG. 2, the case where the contour of the flat recess 3 is a quadrangle has been described. However, the contour of the flat recess 3 may be a polygon such as a hexagon or an ellipse in addition to a square. Or a non-circular recess 3 such as an oval shape, and the outer flange 4 having the same contour slightly smaller than the recess contour of each of these shapes is inserted into the recess 3 of the various contours. ,
The rotation of the terminal fitting 5 with respect to the insulating plate 1 (rotation prevention) was realized.

The reference numeral 7B in FIG. 1 denotes a pilot projecting portion for guiding the vertical movement of the vertical hole 8 of the press die 9 as shown in FIGS. 3 to 5, and further, the reference numeral n1 in FIG. Shown is a male screw screwed into the screw hole n2 of the terminal fitting 5, and the external conductor L is connected to the terminal fitting 5 by the male screw n1.
For example, it can be used by tightly tightening and conducting to the outer surface of the outer flange 4.

As described above, the liquid-tight planting structure and the planting method of the terminal fitting to the insulating plate of the terminal fitting according to the present invention are described below. A rubber ring having a non-circular flat recess 3 formed therein, and a terminal fitting 5 with an outer flange 4 having the above-described recess contour formed of extensible metal formed in the hole 2 of the insulating plate 1 on the flange surface. 6
Until the outer flange 4 is inserted into the recess 3 and the terminal fitting 5
The peripheral edge portion 7A of the insulating plate protrusion 7 is pressed and spread at the hole edge of the die 9 and caulked to form the flange portion 10, so that the non-circular outer flange 4 enters the same non-circular recess 3 and is localized. As a result, the external conductor L can be tightly screwed and connected to the terminal fitting 5, and the liquid-tightness of the large-capacity electrolytic capacitor or the like requiring a large charge / discharge current can be secured. As a terminal plug, an external conductor L can be connected with good conductivity to a capacitor element or the like in a sealed case via another lead piece connected to the end of the terminal fitting 5 opposite to the outer flange by spot welding or the like.

As a second embodiment of the present invention, as shown in FIGS. 7A and 7B, a non-circular hole 2 having a rectangular shape or the like, The terminal fitting 5 having an outer flange having an arbitrary contour and the hole contour part 5A is inserted through the rubber ring disposed on the inner surface of the outer flange up to the hole contour part 5A as shown in each of the above figures. The peripheral edge portion 7A of the terminal fitting protruding portion 7 protruding from the insulating plate 1 is pressed in the process direction from FIG. 3 to FIG. 6 in the process sequence from FIG. 3 to FIG. The terminal fitting 5 can be implanted in the insulating plate 1 in a non-rotating state as in the previous example shown in FIG. 1 and the rubber ring 6 can be connected to the outer flange and the insulating plate 1 by forming the flange portion 10 in pressure contact with the outer flange. A second embodiment of the present invention in which the terminal fitting and the insulating plate are held in a liquid-tight manner by being pressed tightly with each other. It could be realized liquid Dense setting structure of the terminal fitting with respect to the insulating plate by Tairei and its tying method.

The contour of the hole 2 is not limited to the above quadrangle, but may be a hole 2 having a detent 2A as shown in FIG. 7 (c) or a round shape as shown in FIG. 7 (d). A hole 2 having a stop convex portion 2B or a long diameter portion 2 as shown in FIG.
A non-circular hole 2 such as an elliptical shape or an oval shape having C can be adopted, and a ridge 5B or a concave groove 5C having the same contour shape slightly smaller than the non-circular hole 2 having various contour shapes is used. By inserting the hole contour 5A of the terminal fitting 5 into the various non-circular holes 2, the terminal fitting 5
Could be planted in a detented state. The external conductor L can be screwed and connected to the terminal fitting 5 according to this example as in FIG.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The terminal fitting 5 according to each embodiment of the present invention.
For example, as shown in FIG. 8, a perforated lead piece 12 passing through the metal fitting 5 is applied to the outer surface of the flange portion 10 with a washer W interposed therebetween, as shown in FIG. The terminal fitting 5 is crushed by the crushed portion 7C as shown by a dashed line in FIG.
The lead piece 12 is tightly pressed against the outer surface of the flange 10 so that conduction can be secured. Further, the lead piece 12 may be spot-welded to the end of the terminal fitting 5 electrically or ultrasonically at the welding portion y.

Further, in the case where the pilot projections 7B are provided at the ends of the crimping projections 7 of the terminal fitting 5 as shown in the above-mentioned drawings, respectively, as in the inventions of claims 5 and 6 of the present invention. The vertical hole 8 of the push die 9 which moves up and down this projection 7B
, And the positioning of the edge of the press die hole with respect to the crimping projection 7 of the terminal fitting 5 can be easily and surely performed. In this example and each of the above-described examples, the example in which the pressing die 9 is movable and the fixed die D is fixed and the protruding portion 7 of the terminal fitting 5 is pressed by the hole edge of the pressing die 9 and spread by swaging has been described. The same effect is obtained when the die 9 is fixed and the fixed die D is a movable die.

[0017]

According to the first and third aspects of the present invention, a hole 2 and a non-circular flat recess 3 connected to the hole are formed in the insulating plate 1, and the hole of the insulating plate 1 is formed. 2, a terminal metal 5 made of an extensible metal having the outer flange 4 having the concave contour shape is inserted through a rubber ring 6 disposed on the inner surface of the outer flange, and
Is placed in the flat recess 3, and the peripheral edge portion 7 </ b> A of the terminal fitting protruding portion 7 protruding from the insulating plate 1 is moved in the outer flange direction by a hole edge of a push die 9 having a vertical hole 8 which is slightly smaller than its plane profile. The outer flange 4 was deeply penetrated into the non-circular flat recess 3 in a single caulking step, so that the terminal metal fitting was formed. 5, the rubber ring 6 can be held tightly between the outer flange 4 and the insulating plate 1 and compressed to maintain the liquid-tightness between the terminal fitting and the insulating plate. This has the second effect that the external conductor L can be tightly screw-connected to the terminal fitting.

According to the second and fourth aspects of the present invention, a non-circular hole 2 penetrated through an insulating plate 1 is provided with an outer collar 4 made of extensible metal and the hole contour 5A. A peripheral portion of the terminal fitting protruding portion 7 protruding from the insulating plate 1 is provided by inserting the terminal fitting 5 having the rubber ring 6 disposed on the inner surface of the outer flange thereof into the hole contour portion 5A to prevent the terminal fitting 5 from rotating. 7A could be formed with the flange portion 10 pressed and scraped in the outer flange direction at the hole edge of the press die 9 having the vertical hole 8 slightly smaller than its plane contour and pressed against the insulating plate surface.
The contour of the terminal fitting 5 can be arbitrarily selected from among various types of non-circular shapes, and the terminal fitting 5 can be implanted in the insulating plate 1 in a detented state.
The first effect is that the rubber ring 6 can be screwed to the outer flange 4 and the insulating plate 1 so as to be pressed tightly and pressed between the terminal fitting and the insulating plate.
Has the second effect that it is not necessary to form a flat recess in which the outer flange of the terminal fitting enters.

According to the fifth and sixth aspects of the present invention, in addition to the above-described effects, a pilot projection 7B is provided at the end of the crimping projection 7 of the terminal fitting 5 in each of the drawings. As a result, the protrusion 7B can be used as a pilot guide pin for the vertical hole 8 of the press die 9, and the position of the press die hole edge with respect to the crimping protrusion 7 of the terminal fitting 5 is facilitated. The effect that the protrusion 7B can be used also as an external conductor connection part was added.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing an example of a first embodiment of the present invention.

FIG. 2 is a perspective view showing an example of a related state between the insulating plate and the terminal fitting according to the first embodiment of the present invention.

FIG. 3 is a vertical sectional view showing a process sequence for obtaining the product of the present invention shown in FIG. 1;

FIG. 4 is a vertical sectional view showing a process sequence for obtaining the product of the present invention shown in FIG. 1;

FIG. 5 is a vertical sectional view showing a process sequence for obtaining the product of the present invention shown in FIG. 1;

FIG. 6 is a vertical sectional view showing a final step for obtaining the product of the present invention shown in FIG. 1;

FIG. 7 is a perspective view showing an example of a main part of a second embodiment of the present invention.

FIG. 8 is a vertical sectional view showing an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Insulation plate 2 hole 2A Non-rotating concave part 2B Non-rotating convex part 2C Long diameter part 3 Non-circular flat concave part of insulating plate surface for non-rotating terminal fitting 4 Outer flange of terminal fitting 5 Terminal fitting 5A Hole contour of terminal fitting Reference Signs List 6 rubber ring 7 projecting portion of terminal fitting projecting from insulating plate 7A peripheral portion of projecting portion 7B pilot projecting portion 7C crushing portion 8 vertical hole of pushing die 9 pushing die 10 flange of terminal fitting formed by spreading and crimping 11 insulating plate Press-contact part of the flange surface against 12 Lead piece L External conductor

Claims (6)

[Claims] 1. A terminal fitting having an outer flange is inserted into a hole of an insulating plate, and a protruding portion of the terminal fitting protruding from the insulating plate is caulked to the insulating plate, whereby the terminal fitting is planted on the insulating plate. An extensible metal having a hole 2 formed in an insulating plate 1 and a non-circular flat recess 3 connected to the hole, and having an outer flange 4 having the contour of the recess in the hole 2 of the insulating plate 1. The terminal flange 5 is inserted into the rubber ring 6 disposed on the inner surface of the outer flange, the outer flange 4 is placed in the flat recess 3, and the peripheral portion 7A of the terminal fitting protrusion 7 protruding from the insulating plate 1 is removed. The outer flange 4 is formed by pressing and shaping in the direction of the outer flange at the hole edge of the pressing die 9 having the vertical hole 8 which is slightly smaller than the planar contour and crimping the outer flange 4 to press the outer flange 4 against the insulating plate surface. The terminal fitting 5 is prevented from rotating by being inserted deeply into the circular flat recess 3, and The outer ring 4 and the insulating plate 1
And a liquid-tight planting structure of the terminal fitting on the insulating plate, which is compressed tightly and kept liquid-tight between the terminal fitting and the insulating plate. 2. A terminal fitting having an outer flange is inserted into a hole of the insulating plate, and a protruding portion of the terminal fitting protruding from the insulating plate is caulked to the insulating plate, whereby the terminal fitting is planted on the insulating plate. In a non-circular hole 2 penetrated through an insulating plate 1,
A terminal metal member 5 made of extensible metal and having an outer flange 4 and the hole contour portion 5A is inserted into the hole contour portion 5A with a rubber ring 6 disposed on the inner surface of the outer flange interposed therebetween to prevent the terminal metal member 5 from rotating. The peripheral portion 7A of the terminal fitting protruding portion 7 protruding from the insulating plate 1 is pressed in the outer flange direction at the hole edge of the press die 9 having a vertical hole 8 slightly smaller than its plane profile, and is spread and caulked. By forming with the flange 10 pressed against the surface,
The terminal fitting 5 is implanted in the insulating plate 1 in a non-rotating state, and the rubber ring 6 is pressed tightly between the outer flange 4 and the insulating plate 1 so as to be in a liquid-tight state between the terminal fitting and the insulating plate. Liquid-tight planting structure of terminal fittings to the insulating plate. 3. A terminal fitting having an outer flange is inserted into a hole of the insulating plate, and a protruding portion of the terminal fitting protruding from the insulating plate is caulked to the insulating plate, so that the terminal fitting is planted on the insulating plate. In the method, a hole and a non-circular flat recess connected to the hole are formed in the insulating plate, and a terminal metal made of a spreadable metal having an outer flange having the contour of the recess is formed in the hole of the insulating plate. Insertion of the outer flange into the flat recess by inserting up to the rubber ring arranged on the inner surface of the flange, and the hole of the push die having a vertical hole slightly smaller than the plane outline of the peripheral portion of the terminal fitting protrusion protruding from the insulating plate. By pressing and shaving in the outer flange direction at the edge and spreading and caulking and forming a flange portion pressed against the insulating plate surface, the outer flange is deeply inserted into the non-circular flat recess to prevent the terminal fitting from rotating, and The rubber ring is tightly sandwiched between the outer flange and the insulating plate A method of planting a terminal fitting in a liquid-tight manner on an insulating plate that is compressed and liquid-tightly held between the terminal fitting and the insulating plate. 4. A terminal fitting with an outer flange is inserted into a hole of the insulating plate, and a protruding portion of the terminal fitting protruding from the insulating plate is caulked to the insulating plate, so that the terminal fitting is planted on the insulating plate. In the method, a terminal fitting made of extensible metal and having an outer flange and the hole contour portion is inserted into a non-circular hole penetrated through the insulating plate to the hole contour portion with a rubber ring disposed on the inner surface of the outer flange interposed therebetween. The terminal fitting is prevented from rotating, and the peripheral edge portion of the terminal fitting protruding portion protruding from the insulating plate is pressed and spread in the outer flange direction with a hole edge of a push die having a vertical hole slightly smaller than its plane contour. By crimping to form a flange portion pressed against the insulating plate surface, the terminal fitting is implanted in a non-rotating state on the insulating plate, and the rubber ring is tightly sandwiched between the outer flange and the insulating plate and pressed into contact with the terminal fitting. To an insulating plate that maintains liquid-tightness between the Liquid-tight planting method for terminal fittings. 5. A pilot projection 7B for guiding a vertical hole 8 of the push die 9 at an end of a projection 7 of a terminal fitting 5 projecting from the insulating plate 1. Liquid-tight planting structure of terminal fittings to insulating plate. 6. A terminal fitting for an insulating plate according to claim 3, wherein a pilot projecting portion for guiding a vertical hole of the push die is projected from an end of the projecting portion of the terminal fitting protruding from the insulating plate. Liquid-tight planting method.