JP4595234B2 - Airtight installation of terminal fittings to insulating plate - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for hermetically implanting terminal fittings on an insulating plate suitable for use by hermetically implanting terminal fittings serving as conductive terminals for hermetically sealed capacitors and other hermetically sealed electrical components in an insulator.
[0002]
[Prior art]
Conventionally, this type of terminal planting structure is disclosed in, for example, Japanese Utility Model Publication No. 55-105936.
In this conventional technique, a pin-shaped terminal tube having a hollow end and having a flange at the center is inserted into a superposed plate of a hard insulating plate and a rubber plate, and the periphery of the flange is tightly bitten into the synthetic rubber plate. In order to ensure airtightness and liquid tightness, the lower end of the terminal tube is crushed and swaged, and the end of the swaged portion is brought into electrical contact with the capacitor main body directly or via a (chrysanthemum) washer. Further, the terminal plug device for the capacitor is formed by inserting the external conductor into the hollow portion at the other end of the terminal cylinder, and then crushing the terminal cylinder at the periphery with a crimping tool or the like to firmly bond the other end of the terminal cylinder and the external conductor.
[0003]
[Problems to be solved by the invention]
In the conventional technique described above, a pin-shaped terminal metal cylinder with an outer casing is inserted into the hole of the insulating plate, and the terminal tube portion protruding from the insulating plate is crushed and pressed against the insulating plate rubber surface as an airtight holding packing. The terminal metal cylinder is liquid-tightly planted on an insulating plate by caulking, and the terminal plate's liquid-tight and air-tight holding against the insulating plate requires a superposed plate of a hard insulating plate and a rubber plate. A liquid and airtight failure accident occurs due to the above, and the above-mentioned hard insulating plate and rubber plate are more expensive than simple hard insulating plates, and the maintenance and management are troublesome. There are points.
[0004]
In addition to this, a round pin-shaped terminal fitting in which a roulette called a knurl, which is usually called a knurling, is implanted on a plastic insulating plate by insert molding is also well known. In this conventional example, a minute gap has occurred between the terminal fitting and the insulating plate due to “sink” or the like accompanying resin cooling after insert molding. There has been a problem that it cannot be used as a terminal plug for sealed electric parts such as electrolytic capacitors.
[0005]
In order to solve this point, the peripheral portion of the round pin-shaped terminal fitting is hard-insulated, as described in the utility model registration No. 3061547 previously proposed by the present applicant or as described in Japanese Patent Application Laid-Open No. 2000-294453. It is also well known that it is planted by spreading and crushing on the board, but these conventional examples still require a packing member such as a rubber ring or rubber packing to keep the terminal fittings liquid-tight and airtight against the insulating board, and forgetting to put it in It is easy to cause airtight failure accidents due to aging, and also causes liquid-tight airtight failure accidents due to aging of the packing members, and there are problems of liquid resistance of rubber and synthetic resin as packing members, as well as packing such as the above rubber rings There is an essential and big problem that the management and maintenance of the members are troublesome and the cost is increased by the amount of the packing members.
[0006]
In order to eliminate the above-mentioned conventional problems, the present invention inserts a required portion of a terminal fitting into an insulating plate and molds the insulating plate after cooling and solidifying the insulating plate. Only the peripheral part of the protruding terminal part is pushed and squeezed and squeezed with the hole edge of the die to form a flange part that is uniformly and strongly airtightly contacted with the recessed surface of the insulating plate and the peripheral part around the terminal fitting. It is an object of the present invention to make it possible to firmly and firmly implant a terminal fitting with respect to an insulating plate without using a packing member such as a ring.
[0007]
[Means for Solving the Problems]
The object of the present invention is to form a terminal part protruding from a cooled and solidified insulating board after insert molding a required part of the terminal fitting and molding the insulating board when molding the insulating board with thermoplastic plastic. When the terminal fitting is hermetically planted on the insulating plate, the terminal fitting made of a substantially ductile metal, which is softer than the cooled and solidified insulating plate, is used as the retaining portion. The insulating plate is prevented from coming off and insert-molded and planted, and an annular recess is formed on the surface of the insulating plate around the insulating plate protruding portion of the terminal fitting, and the insulating plate protruding portion of the terminal fitting is formed. Only the peripheral edge is pushed and squeezed evenly with the hole edge of the push die having a vertical hole that is slightly smaller than 60 to 95% of the planar contour, while being scraped in a ring shape in the direction of the retaining portion. By forming a flange that is strongly airtightly welded to the surface of the insulating plate annular recess and the periphery of the recess, the terminal fitting is kept airtight to the insulating plate without using an airtight holding member such as a rubber ring or a packing member. This was achieved by planting with caulking.
In addition, the terminal fitting is installed against the insulating plate by the anti-rotation part so that the terminal fitting does not rotate with respect to the insulating plate, and the terminal fitting is kept airtight to the insulating plate and secured. May be.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
First, as shown in FIGS. 1 to 3, the basic form of the present invention is that an insulating plate is formed by insert-molding a required portion of a terminal fitting 5 when the insulating plate 1 is formed of thermoplastic plastic. After fixing the terminal fitting 5 to the insulating plate 1 by crimping the terminal portion protruding from the cooled and solidified insulating plate 1 to the insulating plate 1, phenol resin, polyphenylene sulfide, etc. 2 made of hard reinforced plastic made of hard reinforced plastic as shown in Fig.2 The terminal plate 5 is secured to the insulating plate 1 by the retaining portion 4 and is insert-molded and planted, and is annularly formed on the surface of the insulating plate 1 around the insulating plate protruding portion 6 of the terminal bracket 5. Where 3 was formed as in FIG. 2, against the fixed die D as shown in FIG. 3 will to the lower surface of the terminal fitting 5 after cooled and solidified.
[0009]
Next, only the peripheral edge portion 6A of the protruding portion 6 of the terminal metal fitting 5 protruding from the surface of the annular recess 3 of the insulating plate 1 has a vertical hole 7 that is slightly smaller than about 60 to 95% of its planar outline, The direction of the retaining portion 4 at the edge of the pre-aligned hole of the push die 8 that has been moved by an accurate predetermined size by a well-known means such as a press machine or a mechanical press machine, and that has been vertically divided and closed. That is, the flange 9 is uniformly and strongly airtightly contacted with the surface of the insulating plate annular recess 3 and its rising peripheral edge 3A as shown in FIG. In the present invention, the terminal die 5 is removed from the insulating plate 1 by airtight and liquid-tight sealing as shown in FIG. Product by the method can be obtained, Packing member of rubber ring or the like for the gas-tight seal was required in the example becomes unnecessary in the present invention.
[0010]
That is, especially the outer periphery of the flange portion 9 of this product is shown in the inner peripheral surface of the insulating plate recess 3 and its rising peripheral edge 3A for airtight holding of the terminal fitting 5 because the insulating plate 1 is hard. 1. As shown in FIG. 5, the airtight pressure contact was uniformly distributed, and the terminal metal fitting 5 was stably and surely airtight and liquid tight with respect to the insulating plate 1 and was caulked.
Further, even when the insulating plate annular recess 3 is an annular recess 3 having, for example, a chamfered inclined surface 3a that is inclined obliquely from the recess peripheral edge 3A to the center as shown by a chain line in FIG. The metal fitting 5 was stably and surely hermetically sealed with respect to the insulating plate 1 and was able to be caulked.
Further, ring-shaped irregularities may be formed on the bottom surface of the annular recess 3 of the insulating plate or the slope 3a.
[0011]
In addition, although the part shown with the code | symbol 6B in each figure is a pilot protrusion which engages in the upper small diameter part (not shown) of the push die vertical hole 7, and raises / lowers the push die 8 in an exact raising / lowering position, The pilot protrusion 6B can be omitted if a press machine capable of accurately and finely setting the raising / lowering position of the push die 8 is used.
In addition, a portion indicated by reference numeral 10 in FIG. 1 is a detent portion for preventing the terminal fitting 5 from rotating with respect to the insulating plate 1. In this illustrated example, a part of the outer peripheral surface of the terminal fitting 5 is partially provided. An example in which the terminal fitting 5 is hermetically implanted so as not to rotate with respect to the insulating plate 1 by pouring the insulating plate resin into the provided recess 10A and insert molding is shown. It is also possible to prevent rotation by insert-molding the insulating plate 1 using the same.
[0012]
Further, the anti-rotation portion 10 may be one in which the planar contour of the annular recess 3 is non-circular and the outer flange 9 is uniformly crushed and caulked and hermetically pressure-welded. The terminal metal fitting 5 is prevented from coming off and prevented from rotating with respect to the insulating plate 1 by means of a retaining / rotating stopper 4A formed by partial recesses or projections such as a cross shape as shown in FIG. Can be insert-molded and implanted so as to be immobile with respect to the insulating plate 1.
Further, a non-circular outer casing (not shown) having a planar outline formed in advance on the terminal fitting 5 is embedded in the insulating plate 1 and insert-molded, so that the terminal fitting 5 is prevented from coming off from the insulating plate 1. It is possible to insert and form the terminal metal fitting 5 so that the terminal metal fitting 5 does not move with respect to the insulating plate 1.
[0013]
6 is a male screw screwed into the screw hole n2 of the terminal fitting 5 which has been prevented from rotating and coming off as described above, and the external conductor L is shown in FIG. As shown in FIG. 6, it can be used by tightly tightening and conducting to the outer surface of the terminal fitting 5.
Even at the time of tightening, the terminal fitting 5 does not rotate unless the above-mentioned detent is provided to the insulating plate, and the airtightness is not impaired.
[0014]
【Example】
As described above, the product as shown in FIG. 5 obtained by the method of hermetically implanting the terminal fitting with respect to the insulating plate of the present invention was hermetically implanted as described above on the hard insulating plate 1 used as a lid plate for a sealed electrical component or the like. After inserting the hole of the external conductor L and the lead piece 11 into the caulking connecting small projection 6C which is projected in advance as shown in FIG. 5 in the terminal fitting 5, the small projecting portion 6C is crushed and the caulking portion 6D is crushed. As a gas-tight liquid-tight terminal plug with a large current required for charging / discharging of a large-capacity electrolytic capacitor, other leads welded to the terminal fitting protruding portion 6 by spot welds y as shown by chain lines in FIG. By connecting to the capacitor element electrode or the like through the piece 11, the capacitor element electrode or the like can be connected to the external conductor L with good conductivity.
[0015]
In addition, depending on the hardness of the insulating plate 1 and the terminal fitting 5, the corner of the annular recess peripheral edge 3A of the insulating plate 1 may be slightly crushed by the pressing pressure when the flange 9 is formed. The airtight and liquid-tight performance of the terminal fitting 5 with respect to the insulating plate 1 withstood the pressure of 8 kg / cm ² for a long time as measured by pressurization with an air compressor, and had no practical problem.
[0016]
Further, the planar contour of the annular recess 3 may be oval, elliptical or polygonal in addition to the circular shape shown in FIG. As shown in FIG. 7, the vertical rib 3B having a polygonal or circular crater contour shape is formed on the surface of the insulating plate 1 in the peripheral portion, and the concave rib 3B and the rib peripheral edge 3D in the vertical rib 3B The widened flange 9 may be tightly airtightly pressed to ensure the airtightness of the terminal metal 5 to the insulating plate.
[0017]
Further, when the pilot protrusion 6B is provided as shown in each of the above figures at the outer end of the caulking protrusion 6 of the terminal fitting 5 in the present invention, this protrusion 6B can be used as a connection part, As described above, the pilot guide of the vertical hole 7 of the push die 8 can also be used as a lifting guide, and the position of the edge of the push die with respect to the caulking protrusion 6 of the terminal fitting 5 can be easily and reliably established.
[0018]
In this example and each of the above examples, the pressing die 8 is movable, the fixed die D is fixed, the protruding portion 6 of the terminal metal fitting 5 is pushed and spread in a ring shape at the hole edge of the pressing die 8, and then crimped. As described above, the pressing die 8 is fixed, and the fixed die D is also effective as a movable die.
Further, the shape of the terminal fitting 5 itself may be a prismatic or oval / oval-shaped column, an end-sealed tube, or a tube that can be hermetically sealed, in addition to the substantially round pin shape described above. The planar shape of the recess 3 and the outline of the vertical hole 7 of the push die 8 may be determined corresponding to the above.
[0019]
【The invention's effect】
According to the first aspect of the present invention, when the insulating plate is formed of thermoplastic plastic, a required portion of the terminal fitting 5 is insert-molded and implanted on the insulating plate, and then the cooled and solidified insulating plate. By crimping the terminal portion protruding from 1 to the insulating plate 1, when the terminal metal fitting 5 is hermetically implanted in the insulating plate 1, it is substantially columnar with a ductile metal that is softer than the cooled and solidified insulating plate 1. A terminal fitting 5 made in the above manner is inserted into the insulating plate 1 with a retaining portion 4 so as to prevent the insulating plate 1 from being detached and insert-molded, and on the surface of the insulating plate 1 around the insulating plate protruding portion 6 of the terminal fitting 5. The annular recess 3 is formed, and only the peripheral edge portion 6A of the insulating plate protrusion 6 of the terminal fitting 5 is a hole edge of the pressing die 8 having a vertical hole 7 that is slightly smaller than 65 to 95% of the planar outline, Push in a ring shape toward the outer cage It is possible to form a flange 9 that is uniformly and tightly welded to the surface of the insulating plate annular recess 3 and the peripheral edge 3A of the insulating plate, and is necessary in each of the conventional examples. In the present invention, the terminal metal fitting 5 is securely and securely crimped to the insulating plate 1 without being used at all in the present invention.
[0020]
Therefore, according to the present invention, there is no occurrence of an airtight failure due to forgetting to insert the packing member, and the rubber ring is used in all aspects such as manufacture, storage, distribution, sale, purchase, use and maintenance of sealed electric parts. It is not necessary to take into account the aging and liquid resistance deterioration of packing materials such as, and it is simplified, and the product cost can be reduced by the amount of the packing material, and parts management and maintenance inspection are also simplified. Has a positive effect.
[0021]
According to the inventions of claims 2 to 6 according to the present invention, in addition to the above-mentioned effects, the terminal fitting 5 can be non-rotatably and hermetically implanted with respect to the insulating plate 1 by the anti-rotation portion 10. With respect to the terminal metal fitting 5 implanted in the insulating plate 1, the external conductor L can be tightened to the terminal metal fitting 5 in a state where the insulating plate 1 is fixed and can be used in an electrically conductive manner.
[0022]
In particular, according to the invention of claim 6 of the present invention, the detent of the terminal fitting 5 with respect to the insulating plate 1 is strongly hermetically pressure-welded to the noncircular peripheral edge 3A as well as the surface of the noncircular recess 3 of the insulating plate 1. Since the outer peripheral surface of the flange 9 is automatically pressed strongly against the periphery of the non-circular annular recess 3 when the metal flange 9 is pressed, the terminal metal 5 can be prevented from rotating against the insulating plate 1. The press work was sufficient, and in addition to the fact that the positioning of the terminal fitting 5 with respect to the insulating plate molding die could be simplified, the effect of being able to be carried out with good workability could be added.
[0023]
According to the invention of claim 7 of the present invention, the terminal metal fitting 5 is prevented from being detached from the insulating plate 1 by the retaining and anti-rotation portion 4A formed by the partial recess or projection formed in the terminal metal fitting 5. In addition to the above-mentioned effects, the single retainer-and-circumferential rotation can be carried out in order to prevent the terminal metal fitting 5 from rotating with respect to the insulating plate 1. Only the stopper 4A can prevent the terminal metal 5 from coming off from the insulating plate 1 and prevent it from rotating, and the effect of simplifying the processing of the terminal metal 5 can be added.
[0024]
Furthermore, according to the invention of claim 8 in the present invention, in addition to the above-mentioned effects, the annular recess 3 is formed as a recess by, for example, a chamfered inclined surface 3a from its peripheral edge toward the center lower portion. It is possible to add the effect that the flange portion 9 is easily inserted into the bottom of the annular recess 3 deeply through the slope 3a, and the terminal fitting 5 is easily maintained in an airtight manner against the insulating plate 1.
[0025]
Furthermore, according to the invention of claim 9 of the present invention, in addition to the above effects, the pilot protrusion 6B is provided at the end of the caulking protrusion 6 of the terminal fitting 5, so that the protrusion 6B is It can be used as a pilot guide pin for the vertical hole 7 of the push die 8, and it is easy to align the edge of the push die hole with the caulking protrusion 6 of the terminal fitting 5, and the protrusion 6B can also be used as an external conductor connecting portion. I was able to add the effect of being able to do it.
[0026]
According to the invention of claim 10 in the present invention, in addition to the effects described above, a vertical hole 5A is formed in the terminal metal fitting 5, and the vertical hole can be sealed with another conductor. As a result, it was possible to add an effect that a terminal-related portion for an electric double layer capacitor could be created by a simple process.
[Brief description of the drawings]
FIG. 1 is a vertical sectional elevational view showing an example of an embodiment of the present invention. FIG. 2 is a perspective view showing an example of a state in which a terminal fitting is inserted into an insulating plate used in the present invention. Fig. 4 is a vertical elevation view showing the process sequence of the present invention. Fig. 5 is a vertical elevation view showing an example of a product obtained by the present invention. Fig. 6 is another product obtained by the present invention. FIG. 7 is a perspective view showing another example of the example shown in FIG.
DESCRIPTION OF SYMBOLS 1 Hard insulating board 3 The annular recess 3A formed in the insulating plate surface The peripheral edge 3B of the annular recess The vertical rib 3C of the crater outline The surface 3D in the vertical rib The peripheral edge 3a of the vertical rib The chamfered slope 4 of the annular recess The terminal for the insulating plate Detachment part 4A of the metal fittings to prevent the terminal metal from coming off and used as a non-rotating part 5 The terminal metal fitting 5A which is softer than the hard insulation plate 6A vertical hole 6 of the terminal metal fitting Peripheral edge portion 6B of the metal fitting projection Pilot projection 6C Small protrusion 6C for caulking connection Crushing caulking portion 7 for the caulking connection 7 Vertical hole 8 of the press die 9 Push die 9 Clamping terminal 10 Detent 11 for terminal fitting against lead lead L External conductor

Claims (10)

When an insulating plate is molded from thermoplastic plastic, a required portion of the terminal metal fitting 5 is insert-molded and implanted in the insulating plate, and then the terminal portion protruding from the cooled and solidified insulating plate 1 is caulked to the insulating plate 1. In the method of hermetically implanting the terminal metal fitting 5 on the insulating plate 1 by fastening, the terminal metal fitting 5 made in a substantially columnar shape with a softer and extensible metal than the cooled and solidified insulating plate 1 is used as its retaining portion. 4, the insulating plate 1 is prevented from coming off and insert-molded and planted, and an annular recess 3 is formed on the surface of the insulating plate 1 around the insulating plate protruding portion 6 of the terminal fitting 5. Only the peripheral edge portion 6A of the insulating plate projection 6 is formed in a ring shape in the direction of the retaining portion 4 at the hole edge of the pressing die 8 having the vertical hole 7 that is slightly smaller than the flat outline by 60 to 95%. Even though it is pushed away By forming the flange 9 that is crushed and formed into a tight airtight pressure contact with the surface of the annular recess 3 and the peripheral edge 3A of the insulating plate, the terminal can be used without using an airtight holding member such as a rubber ring or a packing member. An airtight implantation method for terminal fittings on an insulating plate, wherein the metal fitting 5 is planted in an insulating plate 1 while being kept airtight and crimped. The terminal metal fitting 5 is prevented from rotating with respect to the insulating plate 1 by the anti-rotation portion 10 so that the terminal metal fitting 5 is kept airtight to the insulating plate 1 so that the terminal metal fitting 5 does not rotate with respect to the insulating plate 1. 2. The method of hermetically implanting terminal fittings on an insulating plate according to claim 1, wherein the terminal fittings are implanted. The terminal metal fitting 5 is hermetically clamped and planted so that the terminal metal fitting 5 does not rotate with respect to the insulating plate 1 by means of a detent 10 formed by a partial recess or protrusion formed in the terminal metal fitting 5. A method of hermetically implanting terminal fittings on the insulating plate according to claim 2. As the anti-rotation portion 10, a non-circular outer casing having a non-circular planar outline formed in advance on the terminal fitting 5 is embedded in the insulating plate 1 and insert-molded, and the terminal fitting 5 is attached to the insulating plate 1. 3. The method of hermetically implanting terminal fittings on an insulating plate according to claim 2, wherein the terminal fittings are planted in a state that the terminal fittings are kept airtight to the insulating plate 1 so as not to rotate. As the anti-rotation part 10, a terminal metal 5 having a non-circular cross section is embedded in the insulating plate 1 and insert-molded to prevent rotation, so that the terminal metal 5 does not rotate relative to the insulating plate 1. 3. The method of hermetically implanting terminal fittings on an insulating plate according to claim 2, wherein said insulating plate is planted while being airtightly secured to the insulating plate. As the anti-rotation part 10, the planar contour of the annular recess 3 is formed in a non-circular shape, and the anti-rotation is applied by the crimped flange part 9 of the terminal metal fitting 5 that is uniformly airtightly pressed in the recess 3. 3. A method of hermetically implanting terminal fittings on an insulating plate according to claim 2, wherein the terminal fittings are planted in an insulating plate with airtight and crimping. The terminal metal fitting 5 is prevented from coming off from the insulating plate 1 by the partial recess or protrusion 4A formed by the partial recess or protrusion formed in the terminal metal fitting 5, and the terminal metal fitting 5 is rotated around the insulating plate 1. 2. The method of hermetic implantation of terminal fittings on an insulating plate according to claim 1, wherein the planting is carried out while maintaining airtightness and crimping. The method of hermetic implantation of terminal fittings on an insulating plate according to claim 1, wherein the annular recess 3 is a slope 3 a extending from the peripheral edge 3 </ b> A toward the center. 9. A pilot protrusion 6B is provided at an end of the insulating plate protrusion 6 of the terminal fitting 5, and the protrusion 6B is used as a pilot guide for the vertical hole 7 of the push die 8. The airtight installation method of the terminal metal fitting with respect to the insulation board of description. 10. The terminal fitting 5 has a vertical hole 5 </ b> A formed in the terminal fitting 5, and the vertical hole can be sealed with another conductor. Close planting method.

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